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Registro de publicaciones indizadas en Revistas Scopus con filiación UNI 2018

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Registro de publicaciones indizadas en Revistas Scopus con filiación UNI 2018

AutoresTítuloRevistaDOIResumenTipo de documentoLink
Cabrera J., Acosta D., López A., Candal R.J., Marchi C., García P., Ríos D., Rodriguez J.M.1D TiO2 nanostructures prepared from seeds presenting tailored TiO2 crystalline phases and their photocatalytic activity for Escherichia coli in waterInternational Journal of Photoenergy10.1155/2018/1862597TiO2 nanotubes were synthesized by alkaline hydrothermal treatment of TiO2 nanoparticles with a controlled proportion of anatase and rutile. Tailoring of TiO2 phases was achieved by adjusting the pH and type of acid used in the hydrolysis of titanium isopropoxide (first step in the sol-gel synthesis). The anatase proportion in the precursor nanoparticles was in the 3-100% range. Tube-like nanostructures were obtained with an anatase percentage of 18 or higher while flake-like shapes were obtained when rutile was dominant in the seed. After annealing at 400°C for 2 h, a fraction of nanotubes was conserved in all the samples but, depending on the anatase/rutile ratio in the starting material, spherical and rod-shaped structures were also observed. The photocatalytic activity of 1D nanostructures was evaluated by measuring the deactivation of E. coli in stirred water in the dark and under UV-A/B irradiation. Results show that in addition to the bactericidal activity of TiO2 under UV-A illumination, under dark conditions, the decrease in bacteria viability is ascribed to mechanical stress due to stirring. © 2018 Julieta Cabrera et al.artículohttps://www.scopus.com/inward/record.uri?eid=2-s2.0-85052687369&doi=10.1155%2f2018%2f1862597&partnerID=40&md5=20e69de03d78a6d6fbaf8fd86f84b7e9
Moreno-Vera F., Len-Vera L., Guizado-Vsquez J., Vera-Panez M.A comparison of the adaptive behavior from kids to adults to learn Block programmingCEUR Workshop ProceedingsSin DOIBlock programming presents an interactive and very simple way to learn to program, today block programming applications allow you to develop and program the electronic hardware components such as sensors and motors, whose relationship between hardware, software and mobile applications are fundamental in this technological age. In this article we present a study on how much the speed of learning differs and how much information retention capacity children, adolescents and adults have in the same conditions of learning, environment, tools and teaching system with the topic of creating robots through simulation of electronic circuits. In addition, the manipulation of electronic components such as sensors, motors and bluetooth is presented. © 2018 CEUR-WS. All Rights Reserved.conferenciahttps://www.scopus.com/inward/record.uri?eid=2-s2.0-85053671122&partnerID=40&md5=472ec28b72aee9be55e551f2894d9549
Vizcarra G., Mauricio A., Mauricio L.A deep learning approach for sentiment analysis in Spanish TweetsLecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics)10.1007/978-3-030-01424-7_61Sentiment Analysis at Document Level is a well-known problem in Natural Language Processing (NLP), being considered as a reference in NLP, over which new architectures and models are tested in order to compare metrics that are also referents in other issues. This problem has been solved in good enough terms for English language, but its metrics are still quite low in other languages. In addition, architectures which are successful in a language do not necessarily works in another. In the case of Spanish, data quantity and quality become a problem during data preparation and architecture design, due to the few labeled data available including not-textual elements (like emoticons or expressions). This work presents an approach to solve the sentiment analysis problem in Spanish tweets and compares it with the state of art. To do so, a preprocessing algorithm is performed based on interpretation of colloquial expressions and emoticons, and trivial words elimination. Processed sentences turn into matrices using the 3 most successful methods of word embeddings (GloVe, FastText and Word2Vec), then the 3 matrices merge into a 3-channels matrix which is used to feed our CNN-based model. The proposed architecture uses parallel convolution layers as k-grams, by this way the value of each word and their contexts are weighted, to predict the sentiment polarity among 4 possible classes. After several tests, the optimal tuple which improves the accuracy were . Finally, our model presents %61.58 and %71.14 of accuracy in InterTASS and General Corpus respectively. © Springer Nature Switzerland AG 2018.conferenciahttps://www.scopus.com/inward/record.uri?eid=2-s2.0-85054825905&doi=10.1007%2f978-3-030-01424-7_61&partnerID=40&md5=e1ca93d3b1e5847d0f35bf606ab35e16
Felix R., Unsihuay-Vila C.A Model to optimize Mix Power Generation Selection of Distributed Renewable Plants for Expansion Planning with Reliability Criteria: An Application in Puno, PeruProceedings of the 2018 IEEE PES Transmission and Distribution Conference and Exhibition - Latin America, T and D-LA 201810.1109/TDC-LA.2018.8511762This paper proposes a dynamic optimization mathematical approach to obtain the optimum mix of distributed generation plants with renewable energy resources (RER) necessary to provide reliability to critical electrical systems. This model takes as inputs the energy potential ofwater, wind and solar resources available and injectable in each area, investment and operation and maintenance (OM) cost ofthese plants and related infrastructure; as well as parameters of existing electrical grid and conventional generation plants. The proposed model is performed for the 8760 hours of a typical year within which it is considered out-of-service states for existing transmission lines and power plants. A robust approach is contemplated though a cost sensibility analysis. The results of the application performed in a real case in Puno, Peru evidence an improvement of approximately 81% and 68% in reliability indexes SAIDI and SAIFI, respectively. © 2018 IEEE.conferenciahttps://www.scopus.com/inward/record.uri?eid=2-s2.0-85057056951&doi=10.1109%2fTDC-LA.2018.8511762&partnerID=40&md5=1cbf2ad32be92f3bcf3253626108a605
Rueda D., Furukawa R., Fuentes P., Comina G., Rey De Castro N.G., Requena D., Gilman R.H., Sheen P., Zimic M.A novel inexpensive electrochemical sensor for pyrazinoic acid as a potential tool for the identification of pyrazinamide-resistant Mycobacterium tuberculosisInternational Journal of Mycobacteriology10.4103/ijmy.ijmy_63_18Introduction: Tuberculosis (TB) is a significant cause of morbidity and mortality worldwide. The patient compliance with the long treatment regimens is essential for successful eradication. Pyrazinamide (PZA) shortens these regimens from 9 to 6 months, and therefore, improves treatment completion rates. Although PZA is a first-line medication for the treatment of TB, no simple or reliable assay to determine PZA resistance is yet available. In the presence of PZA, only susceptible Mycobacterium tuberculosis strains release pyrazinoic acid (POA). Therefore, the measurement and quantification of released POA is an indicator of PZA resistance. Methods: Two electrochemical sensors were constructed and tested with alternative working electrodes in conjunction with a portable potentiostat to measure the current produced when a potential difference of 2 V is applied to varying concentrations of POA in controlled solutions. Results: The large (13.2 mm) electrochemical sensor was able to detect POA at a minimum concentration of 40 ?M to a statistically significant level (P = 0.0190). Similar graphical trends were obtained when testing the electrochemical sensor in the supernatant of a negative microscopic observation drug susceptibility assay culture, irrespective of the presence of PZA. Conclusion: Inexpensive and reusable electrochemical sensors with a portable potentiostat are a promising tool for the detection of POA, a biomarker of PZA susceptible M. Tuberculosis. © 2018 International Journal of Mycobacteriology | Published by Wolters Kluwer - Medknow.artículohttps://www.scopus.com/inward/record.uri?eid=2-s2.0-85053128180&doi=10.4103%2fijmy.ijmy_63_18&partnerID=40&md5=14cdde69077f65eaa26cdc378e7864b2
Rosales-Huamaní J.A., Castillo-Sequera J.L., Montalvan-Figueroa J.C., Andrade-Choque J.A prototype of speech interface based on the google cloud platform to access a semantic websiteSymmetry10.3390/sym10070268The main restriction of the Semantic Web is the difficulty of the SPARQL language, which is necessary for extracting information from the Knowledge Representation also known as ontology. Making the SemanticWeb accessible for people who do not know SPARQL is essential for the use of friendlier interfaces, and a good alternative is Natural Language. This paper shows the implementation of a friendly prototype interface activated by voice to query and retrieving information from websites built with Semantic Web tools. In that way, the end users avoid the complicated SPARQL language. To achieve this, the interface recognizes a speech query and converts it into text, it processes the text through a Java program and identifies keywords, generates a SPARQL query, extracts the information from the website and reads it in a voice for the user. In our work, Google Cloud Speech API makes Speech-to-Text conversions and Text-to Speech conversions are made with SVOX Pico. As a result, we have measured three variables: the success rate in queries, the response time of query and a usability survey. The values of the variables allow the evaluation of our prototype. Finally, the interface proposed provides us with a new approach in the problem, using the Cloud like a Service, reducing barriers of access to the SemanticWeb for people without technical knowledge of SemanticWeb technologies. © 2018 by the author.artículohttps://www.scopus.com/inward/record.uri?eid=2-s2.0-85050377054&doi=10.3390%2fsym10070268&partnerID=40&md5=69318c9e0cd58f7bc7a119bfc58ecfb8
Fernandez D.N.A Real-Time Recognition System for User Characteristics Based on Deep LearningProceedings of the 2018 IEEE 25th International Conference on Electronics, Electrical Engineering and Computing, INTERCON 201810.1109/INTERCON.2018.8526381This paper describes an implementation of a novel real-time recognition system which is capable to identify important information from a single user such as gender, age, emotions and hand gestures. The key of this recognition system is the classification process. This is carried out by using several convolutional neural networks that were designed to achieve a high accuracy rate and acceptable response time making use of low computational resources. As a result, this recognition system could be useful in numerous applications like human-computer interaction, person identification, security control and others. © 2018 IEEE.conferenciahttps://www.scopus.com/inward/record.uri?eid=2-s2.0-85058039108&doi=10.1109%2fINTERCON.2018.8526381&partnerID=40&md5=c0950fd52179c7296093a0af57a50832
León M.Z.D., Christian Sologuren R.A Simple and Efficient Method to Calculate the Magnetic Field Generated by Power Transmission Lines in Real SituationsProceedings of the 2018 IEEE PES Transmission and Distribution Conference and Exhibition - Latin America, T and D-LA 201810.1109/TDC-LA.2018.8511689In the present work the available investigations on the calculation of the magnetic field produced by the current of the conductors of high voltage transmission lines are reviewed. Based on this review, a new simple and efficient method is developed to calculate said magnetic field considering the buckling of the conductors, as well as the change of trajectory of the line. For this purpose, the conductors are modeled as a set of horizontal segments that follow the path of the transmission line. The magnetic field is calculated in a very simple way by applying the Biot-Savart Law to each segment and, subsequently, the superposition principle. This method was applied in many configurations of real transmission lines found in different papers, resulting a good approximation of the rigorous analysis and, at the same time, more accurate than the approximate method found in the literature. The development of the algorithm proposed by the present method is simpler than those available and requires less computational time to obtain the same results. © 2018 IEEE.conferenciahttps://www.scopus.com/inward/record.uri?eid=2-s2.0-85056999090&doi=10.1109%2fTDC-LA.2018.8511689&partnerID=40&md5=d7e4251a43216a69a18dcfd6c02e4cd8
Bedia J., Belver C., Ponce S., Rodriguez J., Rodriguez J.J.Adsorption of antipyrine by activated carbons from FeCl3-activation of Tara gumChemical Engineering Journal10.1016/j.cej.2017.09.161Activated carbons were synthesized by FeCl3-activation of Tara gum at different temperatures (400–1000 °C). The activating agent and the precursor were physically mixed at different ratios (r = FeCl3:precursor, 0.5–3.0 wt). At r = 2 and 800 °C the most developed porosity was achieved, with a BET surface area of 1680 m2·g?1 and a pore volume near 1 cm3·g?1, corresponding mostly to micropores (?75%). The carbons were fully characterized and tested for the aqueous-phase adsorption of antipyrine, used as model emerging pollutant. The kinetic curves and adsorption isotherms at 20, 40 and 60 °C were obtained, which fitted well to hyperbolic and Langmuir equations, respectively. At 20 °C, the saturation adsorption capacity was around 275 mg·g?1 AC. The free energy of adsorption varied from ?40.2 to ?35.7 kJ·mol?1, while values close to ?3 kJ·mol?1 and 112 J·mol?1·K?1, were obtained for the enthalpy and entropy of adsorption, respectively. © 2017 Elsevier B.V.artículohttps://www.scopus.com/inward/record.uri?eid=2-s2.0-85033442168&doi=10.1016%2fj.cej.2017.09.161&partnerID=40&md5=edced6ab54dd0264081c93ab1869baf4
Gran R., Betancourt M., Elkins M., Rodrigues P.A., Akbar F., Aliaga L., Andrade D.A., Bashyal A., Bellantoni L., Bercellie A., Bodek A., Bravar A., Budd H., Vera G.F.R.C., Cai T., Carneiro M.F., Coplowe D., Da Motta H., Dytman S.A., Díaz G.A., Felix J., Fields L., Fine R., Gallagher H., Ghosh A., Haider H., Han J.Y., Harris D.A., Henry S., Jena D., Kleykamp J., Kordosky M., Le T., Leistico J.R., Lovlein A., Lu X.-G., Maher E., Manly S., Mann W.A., Marshall C.M., McFarland K.S., McGowan A.M., Messerly B., Miller J., Mislivec A., Morfín J.G., Mousseau J., Naples D., Nelson J.K., Nguyen C., Norrick A., Nuruzzaman, Olivier A., Paolone V., Patrick C.E., Perdue G.N., Ramírez M.A., Ransome R.D., Ray H., Ren L., Rimal D., Ruterbories D., Schellman H., Salinas C.J.S., Su H., Sultana M., Falero S.S., Valencia E., Wolcott J., Wospakrik M., Yaeggy B., (MINERvA Collaboration)Antineutrino Charged-Current Reactions on Hydrocarbon with Low Momentum TransferPhysical Review Letters10.1103/PhysRevLett.120.221805We report on multinucleon effects in low momentum transfer (artículohttps://www.scopus.com/inward/record.uri?eid=2-s2.0-85048238612&doi=10.1103%2fPhysRevLett.120.221805&partnerID=40&md5=b0610da9e5341ff92e6f6f9864b1d81f
Nakata I.M., Fernández F.G., Carrillo A.T., Haro P.E., Pinaud L.A.Application of the Monte Carlo method to estimate the uncertainty in the compressive strength test of high-strength concrete modelled with a multilayer perceptron Revista de la Construccion10.7764/RDLC.17.2.319The use of artificial neural networks as a modeling tool for the physic-mechanical properties of diverse materials has experienced great advances in the last ten years, mainly due to the increased in computing capacities of computers. This technique has been used in many different fields of science and its effectiveness is sufficiently proven. Its application in the particle board industry complies with the requirements of the test regulations for the use in production control, as an alternative method to normalized one. However, in spite of providing a result with a great approximation, they do not indicate anything about the uncertainty of the result. This last point is crucial when the results have to be compared with a product standard. There are internationally accepted deterministic techniques for obtaining the uncertainty of a test result, always starting from the knowledge of the function that relates the measure with the measurement parameters. However, these techniques are not entirely adequate for the case of excessively complex functions such as an artificial neural network. In these cases, the use of stochastic simulation methods such as the Monte Carlo method is more appropriate. In this article, an artificial neural network will be developed to obtain the compressive strength of high-strength concrete to later obtain the uncertainty by a Monte Carlo simulation. © 2018 Pontificia Universidad Catolica de Chile, Escuela de Construccion Civil.La utilización de las redes neuronales artificiales como herramienta de modelización de las propiedades físico-mecánicas de muy diversos materiales ha experimentado un gran avance en los últimos diez años debido principalmente al incremento de las capacidades de cálculo de los ordenadores. Esta técnica ha sido empleada en muy diversos ámbitos de la ciencia y su efectividad está suficientemente acreditada. Su aplicación en la industria de tableros de partículas cumple con los requisitos de las normativas de ensayo para la utilización en el control de producción de métodos alternativos al normalizado. Sin embargo, pese a proporcionar un resultado con una gran aproximación, no indican nada sobre la incertidumbre de dicho resultado. Y este último punto es crucial cuando se compara el resultado con la especificación del producto. Existen técnicas deterministas, aceptadas internacionalmente, para la obtención de la incertidumbre de un ensayo, siempre partiendo del conocimiento de la función que relaciona el mensurando con los parámetros de medida. Sin embargo estas técnicas no son del todo adecuadas para el caso de funciones excesivamente complejas como es el caso de una red neuronal artificial. En estos casos es más adecuado la utilización de métodos estocásticos de simulación como el método de Montecarlo. En este artículo se va a desarrollar una red neuronal artificial para la obtención de la resistencia a compresión del concreto para posteriormente obtener la incertidumbre mediante una simulación de Montecarlo. © 2018 Pontificia Universidad Catolica de Chile, Escuela de Construccion Civil.artículohttps://www.scopus.com/inward/record.uri?eid=2-s2.0-85052597109&doi=10.7764%2fRDLC.17.2.319&partnerID=40&md5=4f6a80f6876d0634cd6711b595563ae2
Delgado A., Aguirre A., Palomino E., Salazar G.Applying triangular whitenization weight functions to assess water quality of main affluents of Rimac riverProceedings of the 2017 Electronic Congress, E-CON UNI 201710.1109/ECON.2017.8247308The Rimac river watershed is characterized by its over exploitation of natural resources, such as mining activities and hydroelectric power, this fact makes necessary to assess water quality on its main affluent rivers. In this work, we apply the center-point triangular whitenization weight functions (CTWF) method, which is based on the grey systems theory that is an approach from artificial intelligence. In the case study, we analyze the following Rimac river affluents: Blanco river, Aruri river, Rimac river, Mayo river, and Santa river. The monitoring data on each affluent were obtained from Water National Authority of Peru (ANA). The CTWF method was applied using parameters of water quality such as O2, DBO, DQO, SS, NH3, and NO3. Then, the results were ranked using the Prati scale. Consequently, the results showed that all affluents classified as uncontaminated within the Prati scale, which means that these should be treated by conventional methods to be purified. However, the affluent Blanco river was more vulnerable to be contaminated. Finally, the results of this study could be used by local authorities or central government to make the best decision on the Rimac river watershed management. © 2017 IEEE.conferenciahttps://www.scopus.com/inward/record.uri?eid=2-s2.0-85049561369&doi=10.1109%2fECON.2017.8247308&partnerID=40&md5=ab86351c42dae3d5189b844c3a70e1fa
Delgado A., Vriclizar D., Medina E.Artificial intelligence model based on grey systems to assess water quality from Santa river watershedProceedings of the 2017 Electronic Congress, E-CON UNI 201710.1109/ECON.2017.8247310Water resources quality assessment is a topic very complex, as it demands a great variety of parameters to be analyzed. In this context, the grey clustering method, which is based on grey systems theory, offers an interesting alternative to assess water quality using artificial intelligence criteria. In this study, we assess water quality from Santa river watershed according to parameters stablish by MINAM-Peru (DS N° 015-2015). In addition, we analyze monitoring data from water national authority from Peru (ANA), which was collected, in the study area, in 2013. Twenty-one monitoring points from Santa river watershed were analyzed. The results showed that 47.6% of the monitoring points presented good water quality to consumption of the population, which indicated that could be purified by applying disinfection; 33.3% of the monitoring points presented moderate water quality to consumption of the population, which indicated that could be purified by applying conventional treatment; and 19.1% of the monitoring points presented low water quality to consumption of the population, which indicated that could be purified by applying special treatment. The grey clustering method showed interesting results and could be applied to others studies on water quality or environmental quality in general. © 2017 IEEE.conferenciahttps://www.scopus.com/inward/record.uri?eid=2-s2.0-85049553781&doi=10.1109%2fECON.2017.8247310&partnerID=40&md5=c665450bc26418edf2df2c39b333cea2
Morales G., Kemper G., Sevillano G., Arteaga D., Ortega I., Telles J.Automatic segmentation of Mauritia flexuosa in unmanned aerial vehicle (UAV) imagery using deep learningForests10.3390/f9120736One of the most important ecosystems in the Amazon rainforest is the Mauritia flexuosa swamp or "aguajal". However, deforestation of its dominant species, the Mauritia flexuosa palm, also known as "aguaje", is a common issue, and conservation is poorly monitored because of the difficult access to these swamps. The contribution of this paper is twofold: the presentation of a dataset called MauFlex, and the proposal of a segmentation and measurement method for areas covered in Mauritia flexuosa palms using high-resolution aerial images acquired by UAVs. The method performs a semantic segmentation of Mauritia flexuosa using an end-to-end trainable Convolutional Neural Network (CNN) based on the Deeplab v3+ architecture. Images were acquired under different environment and light conditions using three different RGB cameras. The MauFlex dataset was created from these images and it consists of 25,248 image patches of 512 × 512 pixels and their respective ground truth masks. The results over the test set achieved an accuracy of 98.143%, specificity of 96.599%, and sensitivity of 95.556%. It is shown that our method is able not only to detect full-grown isolated Mauritia flexuosa palms, but also young palms or palms partially covered by other types of vegetation. © 2018 by the authors.artículohttps://www.scopus.com/inward/record.uri?eid=2-s2.0-85057842228&doi=10.3390%2ff9120736&partnerID=40&md5=ba0c54d23cc46258a38351305eaba7e0
Huamani-Palomino R.G., Jacinto C.R., Alarcón H., Mejía I.M., López R.C., Silva D.D.O., Cavalheiro E.T.G., Venâncio T., Dávalos J.Z., Valderrama A.C.Chemical modification of alginate with cysteine and its application for the removal of Pb(II) from aqueous solutionsInternational Journal of Biological Macromolecules10.1016/j.ijbiomac.2018.09.096It has been synthesized, characterized and tested a new biomaterial AlgS (sodium alginate functionalized with cysteine) to remove Pb(II) in aqueous media. The maximum Pb(II)-sorption capacity of AlgS (Qmax = 770 mg·g?1) is between almost two and nine times higher than other alginate-materials reported in the literature. Techniques, such as TGA/DSC, SEM/EDS, BET, FTIR, UV–Vis, XRD and 13C solid state-NMR have been used to study the chemical-modification of alginate at oxidation and aminofication stages. The formation of the imine intermediate (–C=N–), after 24 h of reaction was identified by a UV band at 348 nm. Typical IR-bands of AlgS were identified at 2970, 955, 949 and 1253 cm?1 which are associated to C–H, S–Pb, S–H and C–N stretching vibrations, respectively. 13C solid state-NMR spectra of AlgS, show peaks at 33–38 ppm and 55–60 ppm associate to ? (HS-CH2-) of cysteine and ? (C–N) respectively. The ?H° and ?G° negative values for Pb(II) sorption indicate that it is an exothermic process and occur spontaneously. Finally, it was found that the Pb(II) sorption on AlgS is significantly affected by the presence of cationic (Na+, Mg2+ and Al3+) and anionic (Cl?, NO3 ?) co-ions. © 2018 Elsevier B.V.artículohttps://www.scopus.com/inward/record.uri?eid=2-s2.0-85056193084&doi=10.1016%2fj.ijbiomac.2018.09.096&partnerID=40&md5=93f92a13aed62600204ec66f472f66de
Córdova B.M., Jacinto C.R., Alarcón H., Mejía I.M., López R.C., de Oliveira Silva D., Cavalheiro E., Venâncio T., Dávalos J.Z., Valderrama A.C.Chemical modification of sodium alginate with thiosemicarbazide for the removal of Pb(II) and Cd(II) from aqueous solutionsInternational Journal of Biological Macromolecules10.1016/j.ijbiomac.2018.08.095A new material (AlgOx–TSC), based on alginate (Alg) chemically modified with thiosemicarbazide (TSC), has been synthesized and tested as an effective biomaterial to remove Pb(II) and Cd(II) ions in aqueous solutions. The synthesis was carried out by controlling the following steps, i/partial oxidation process of alginate in NaIO4 to obtain AlgOx, ii/reacting of AlgOx, at 40–45 °C, with TSC in NaBH4. AlgOx–TSC has been characterized by Field Emission Scanning Electron Microscopy (FESEM/EDS), Fourier Transform Infrared Spectroscopy (ATR-IR), solid state 13C NMR spectroscopy and Point of Zero Charge (pHPZC) measuremenmts. In order to enhance the sorption process, the effect of contact time, sorbent dosage, initial concentration and reusability of the novel sorbent were investigated becoming the AlgOx–TSC a promising material capable of removing high concentrations of heavy metal ions such as Pb(II) (up to 950 mg/g at pH 3) and Cd(II) (up to 300 mg/g at pH 7) in aqueous solutions. © 2018 Elsevier B.V.artículohttps://www.scopus.com/inward/record.uri?eid=2-s2.0-85054407865&doi=10.1016%2fj.ijbiomac.2018.08.095&partnerID=40&md5=a3ef1ac1e3ca8c78e8fc846100bc4abe
Riveros R.Chemical treatment and reuse applications for latex paint industry wastewaterDesalination and Water Treatment10.5004/dwt.2018.21932Latex paint industries in Peru produce high volumes of wastewater discharges. This wastewater shows high concentration of suspended solids (>5,000 ppm), COD > 1,000 ppm and bacterial content (>100,000 CFU/mL). This study describes a suitable treatment technology for latex paint industry wastewater that allows treated water reuse in latex paint production. Treatment of these effluents consisted on a physicochemical treatment, using aluminium polychloride (PAC) as coagulant and anionic polyacrylamide (PAM) as flocculant. Process worked with 3 m3/h treatment flow in following doses: 1,200 ppm PAC and 2 ppm PAM, and hydraulic retention time of 5 h. Clarified water, after disinfection treatment with sodium hypochlorite (10 ppm and 1 h of contact), met the following standards: TSS = 12 ppm, TDS = 680 ppm, free chlorine = 0.6 ppm, pH = 7.3 and bacterial content lower than 1,000 CFU/mL. Three types of acrylic latex paintings with treated water, and quality standards such as pH, viscosity, and density fell within the quality limits, were produced. Up to 56 % of raw wastewater production was obtained and wastewater recycling is a profitable activity due to the economic savings. © 2018 Desalination Publications. All rights reserved.artículohttps://www.scopus.com/inward/record.uri?eid=2-s2.0-85044733048&doi=10.5004%2fdwt.2018.21932&partnerID=40&md5=3e2b252510d132d1d6f6c611f55f52f8
Leonardo Castillo N., Arturo Ortega M., Luyo J.E.Climate conditions of the "el Nino" phenomenon for a hydro-eolic complementarity project in PeruIOP Conference Series: Earth and Environmental Science10.1088/1755-1315/154/1/012002Northern Peru is threatened by the consequences of a natural phenomenon called "El Nino", mainly during the months of December to April. In the summer of 2017, this event reported strong climatic variations with intense rains, increasing the water levels of the Chira and Piura rivers, filling the Poechos reservoir, together with flooding and mudding. However, from an energetic perspective, these climatic alterations have a strong potential to increase the availability of the wind and hydro renewable energies in northern Peru. This work performs an evaluation of the hydro-eolic complementarity as part of the sustainability of energy systems. The study includes evaluation of historical records of wind velocity and water flow rates. It then evaluates correlation, analysis, and estimates the hydro and wind energy potentials generated by this phenomenon. The implications of the «El Nino» phenomenon are mostly negative. Nonetheless, it is possible to take advantage of higher wind and water flow rates with a hybrid energy system. The results obtained show a high degree of complementarity both normal and «El Nino» phenomenon condition in northern Peru. © Published under licence by IOP Publishing Ltd.conferenciahttps://www.scopus.com/inward/record.uri?eid=2-s2.0-85048402581&doi=10.1088%2f1755-1315%2f154%2f1%2f012002&partnerID=40&md5=c5f9b8454faaa7369466b480943b3fac
Morales G., Huamán S.G., Telles J.Cloud detection in high-resolution multispectral satellite imagery using deep learningLecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics)10.1007/978-3-030-01424-7_28Cloud detection in high-resolution satellite images is a critical step for many remote sensing applications, but also a challenge, as such images have limited spectral bands. The contribution of this paper is twofold: We present a dataset called CloudPeru as well as a methodology for cloud detection in multispectral satellite images (approximately 2.8 meters per pixel) using deep learning. We prove that an agile Convolutional Neural Network (CNN) is able to distinguish between non-clouds and different types of clouds, including thin and very small ones, and achieve a classification accuracy of 99.94%. Each image is subdivided into superpixels by the SLICO algorithm, which are then processed by the trained CNN. Finally, we obtain the cloud mask by applying a threshold of 0.5 on the probability map. The results are compared with manually annotated images, showing a Kappa coefficient of 0.944, which is higher than that of compared methods. © Springer Nature Switzerland AG 2018.conferenciahttps://www.scopus.com/inward/record.uri?eid=2-s2.0-85054806879&doi=10.1007%2f978-3-030-01424-7_28&partnerID=40&md5=79bfee12c74c48b24ae450a0255ce9f8
Torre A., Villavicencio A., Arrieta J.Comparative permeability analysis of straight concrete and concrete with addition of microsilica and metakaolinREHABENDSin DOIIn the rate of deterioration of concrete, permeability is the parameter that directly influences, especially in situations where concrete is exposed to moisture. Currently there are no reference values that allow to know the degree of permeability of concrete with additions, which is known that improve by additions, such as microsilica (MS) and Metakaolin (MK). The purpose of the present work is to quantify the effect of small amounts of MS (5-10%) and MK (10-15%) on concrete permeability. The mixtures, which were use, correspond to w/c ratios of 0, 40 to 0, 60 and tests were carried out at 28 and 56 days. The permeability coefficient k was measured by applying a hydrostatic pressure difference between the two faces of the specimens. The flow of water passing through the specimens, or the depth of penetration in the material, was measure and the results show a significant reduction in k with MS and MK additions. For 10%MS the K parameter obtained was 0.95×10-13m/s;in case of 15% MK this K value was 0.61x10-13m/s. © 2018, University of Cantabria - Building Technology R&D Group. All rights reserved.conferenciahttps://www.scopus.com/inward/record.uri?eid=2-s2.0-85058001282&partnerID=40&md5=4df1cda66f8525b75fb9d2f721ec1043
López J., Mauricio A., Rojas A., Dianderas E., Vargas-Machuca J., Rodríguez R.Comparative study of autonomous aerial navigation methods oriented to environmental monitoringMechanisms and Machine Science10.1007/978-3-319-67567-1_29Autonomous robots have allowed automation of a wide range of environmental monitoring processes, these include spatial extension mapping, remote sensing and acquisition of environmental data. Among these applications, the acquisition of environmental data has received a growing interest because of its scientific and social importance. The collected information could be air pollution data to evaluate air quality or impacts of environmental disasters, or humidity and speed of winds data to evaluate quickly and directly climate anomalies. Motivated by fast paced advances in this priority area, this work develops and compares the most used techniques of path planning in autonomous robots under physical constraints of environmental monitoring. © 2018, Springer International Publishing AG.conferenciahttps://www.scopus.com/inward/record.uri?eid=2-s2.0-85031313835&doi=10.1007%2f978-3-319-67567-1_29&partnerID=40&md5=0cb8a0d462b9e9dadbdd06e344b14498
Sacasqui M.Comparison of Methodologies: Analytical Hierarchy Process and Grey Clustering with Entropy Weight for the Multicriteria Assessment of the Energy Sources of PerúProceedings of the 2018 IEEE PES Transmission and Distribution Conference and Exhibition - Latin America, T and D-LA 201810.1109/TDC-LA.2018.8511700This article introduces a comparison among decision making methodologies applied to energetic policies. Every country has a challenge that is choice the most suitable energetic source in order to the common welfare, it is the reason for use decision making supported by structured methods that can be Analytical Hierarchic Process, Grey Clustering with Entropy Weight (both used in this research) or another. The result shows the differences and similarities due each methodology and for the same case analyzed also the Peruvian energetic sources were qualified. According both methodologies, the most important sources are: hydraulic, natural gas and fuel (saving order). The important sources are: or solar, geothermic, biomass, eolic or geothermic, solar, biomass, eolic (respectively for each method). The less important are: or liquid hydrocarbons, carbon, bio-fuels, sea-wave, tidal, uranium or liquid hydrocarbons, carbon, bio-fuels, uranium, tidal, sea-wave (respectively for each method). Finally this research could be used for improve the decision making in energetic policy topics trough the new method Grey Clustering with Entropy Weight. © 2018 IEEE.conferenciahttps://www.scopus.com/inward/record.uri?eid=2-s2.0-85057036717&doi=10.1109%2fTDC-LA.2018.8511700&partnerID=40&md5=092b8ddce63a8f981002a6ebedfab179
Cruz G.J.F., Gómez M.M., Solis J.L., Rimaycuna J., Solis R.L., Cruz J.F., Rathnayake B., Keiski R.L.Composites of ZnO nanoparticles and biomass based activated carbon: adsorption, photocatalytic and antibacterial capacitiesWater science and technology: a journal of the International Association on Water Pollution Research10.2166/wst.2018.176Composite material (AC-ZnO) was prepared by growing ZnO nanoparticles during the production of biomass based-activated carbon (AC) via the incorporation of zinc acetate in the process. Comprehensive analyses confirmed the presence of ZnO nanoparticles over the AC surface and described the particular nature of the composite adsorbent. Methylene blue (MB) equilibrium data fitted the Dubinin-Radushkevich model. The MB adsorption capacity was higher for the bare activated carbons (197.9-188.7 mg/g) than the activated carbons with ZnO nanoparticles (137.6-149.7 mg/g). The adsorption of the MB on the adsorbents is physical because the mean adsorption energy (E) is between 1.76 and 2.00 kJ/mol. Experiments that combine adsorption and photocatalysis were carried out with different loads of adsorbents and with and without UV-light exposure. Photocatalytic activity was identified mostly at the first stage of the adsorption process and, in the case of experiments with less load of the composite AC-ZnO, because the light obstruction effect of the activated carbon is more for higher loads. The ZnO grown over AC improves the adsorption of cations such as Pb, Al and Fe in aqueous phase (polluted river water) and provides antibacterial capacity against Escherichia coli and Salmonella typhimurium.artículohttps://www.scopus.com/inward/record.uri?eid=2-s2.0-85050849099&doi=10.2166%2fwst.2018.176&partnerID=40&md5=4380fbc042ef97c1ffe9f54c269970e7
Huamaní L.A.N.Computación Evolucionaria para Estimar VolatilidadProceedings of the LACCEI international Multi-conference for Engineering, Education and TeCHIology10.18687/LACCEI2018.1.1.436A performance evaluation study is implemented between the methods of Genetic Algorithms with Floating Point representation and some traditional optimization methods, in the task of estimating the parameters of a GARCH (1,1) Normal process, using artificial data obtained by simulation. The results show that the approximate solutions obtained by means of Genetic Algorithms present a better stability and precision with respect to the traditional optimization methods. The choice of the initial point in numerical optimization methods is not a critical condition in the use of Genetic Algorithms as a method to find the solution. Finally, Genetic Algorithm method is illustrated in the finding of the solution of the vector of parameters of the likelihood function of a GARCH (1,1) t-Student model, using data of rates of exchange returns of the Sol against to the Dollarconferenciahttps://www.scopus.com/inward/record.uri?eid=2-s2.0-85057504417&doi=10.18687%2fLACCEI2018.1.1.436&partnerID=40&md5=cb59a2f6642fe805fcae1bdc928e9ffa
Proaño A., Bui D.P., López J.W., Vu N.M., Bravard M.A., Lee G.O., Tracey B.H., Xu Z., Comina G., Ticona E., Mollura D.J., Friedland J.S., Moore D.A.J., Evans C.A., Caligiuri P., Gilman R.H., Cabrera L., Varela M., Vigil-Romani F., Chacaltana J., Cabrera J.L., Salas A., Llanos F., Ñavincopa M., Kirwan D.E., Datta S., Rothstein J.D., Doria N.A., Hérnandez-Córdova G., Oberhelman R., Coronel J., Caviedes L., Zimic M., Oren E., Tuberculosis Working Group in Peru*Cough Frequency During Treatment Associated With Baseline Cavitary Volume and Proximity to the Airway in Pulmonary TBChest10.1016/j.chest.2018.03.006Background: Cough frequency, and its duration, is a biomarker that can be used in low-resource settings without the need of laboratory culture and has been associated with transmission and treatment response. Radiologic characteristics associated with increased cough frequency may be important in understanding transmission. The relationship between cough frequency and cavitary lung disease has not been studied. Methods: We analyzed data in 41 adults who were HIV negative and had culture-confirmed, drug-susceptible pulmonary TB throughout treatment. Cough recordings were based on the Cayetano Cough Monitor, and sputum samples were evaluated using microscopic observation drug susceptibility broth culture; among culture-positive samples, bacillary burden was assessed by means of time to positivity. CT scans were analyzed by a US-board-certified radiologist and a computer-automated algorithm. The algorithm evaluated cavity volume and cavitary proximity to the airway. CT scans were obtained within 1 month of treatment initiation. We compared small cavities (? 7 mL) and large cavities (> 7 mL) and cavities located closer to (? 10 mm) and farther from (> 10 mm) the airway to cough frequency and cough cessation until treatment day 60. Results: Cough frequency during treatment was twofold higher in participants with large cavity volumes (rate ratio [RR], 1.98; P =.01) and cavities located closer to the airway (RR, 2.44; P =.001). Comparably, cough ceased three times faster in participants with smaller cavities (adjusted hazard ratio [HR], 2.89; P =.06) and those farther from the airway (adjusted HR, 3.61;, P =.02). Similar results were found for bacillary burden and culture conversion during treatment. Conclusions: Cough frequency during treatment is greater and lasts longer in patients with larger cavities, especially those closer to the airway. © 2018 The Authorsartículohttps://www.scopus.com/inward/record.uri?eid=2-s2.0-85047322507&doi=10.1016%2fj.chest.2018.03.006&partnerID=40&md5=23f5bd6204b1ecc49c4cc2523b14812d
Guccione J.A., Guccione J.J., Valqui C.Cyclic homology of cleft extensions of algebrasJournal of Algebra and its Applications10.1142/S0219498818500913Let k be a commutative algebra with Q ⊆ k and let (E,p,i) be a cleft extension of A. We obtain a new mixed complex, simpler than the canonical one, giving the Hochschild and cyclic homologies of E relative to ker(p). This complex resembles the canonical reduced mixed complex of an augmented algebra. We begin the study of our complex showing that it has a harmonic decomposition like the one considered by Cuntz and Quillen for the normalized mixed complex of an algebra. © 2018 World Scientific Publishing Company.artículohttps://www.scopus.com/inward/record.uri?eid=2-s2.0-85030871746&doi=10.1142%2fS0219498818500913&partnerID=40&md5=d0e821d34a4207fe620d02513200dbcd
Apolinario Lainez M.P.E., Huaman Bustamante S.G., Orellana G.C.Deep Learning Applied to Identification of Commercial Timber Species from PeruProceedings of the 2018 IEEE 25th International Conference on Electronics, Electrical Engineering and Computing, INTERCON 201810.1109/INTERCON.2018.8526457Automatic identification of timber species is a necessity and a challenge in several aspects, especially for government institutions in charge of monitoring forestry resources. In this paper, we propose a methodology to develop an efficient computational model to identify wood samples of seven commercial timber species chosen according to availability of samples properly classified by specialists. For this, we created image sets of wood of seven timber species using a portable digital microscope connected to a personal computer. These images were divided into patches and grouped into training, validation and test sets, with which a convolutional neuronal network was trained. It consist of four layers: two convolutional layers with max pooling and two fully connected layers at the output. Previously, three image patch sizes were evaluated to find the highest accuracy value, precision and sensitivity for the identification. The results show a good performance of the computational model with an accuracy of 94.05% and precision and sensitivity values around 90%, under proposed conditions. © 2018 IEEE.conferenciahttps://www.scopus.com/inward/record.uri?eid=2-s2.0-85058062081&doi=10.1109%2fINTERCON.2018.8526457&partnerID=40&md5=e06d9eb74d80d2ceaccb9239afe6bf34
Bautista S., Morales C.A., Villavicencio H.Descriptive set theory for expansive systemsJournal of Mathematical Analysis and Applications10.1016/j.jmaa.2017.12.014Kato [5] and Artigue [3] merged the theory of expansive systems [10] and foliations with the continuum theory [14]. Here we merge the expansive systems but with the descriptive set theory [6] instead. More precisely, we define meagre-expansivity for both homeomorphisms and measures by requiring the interior of the dynamical balls up to some prefixed radio to be either empty or with zero measure respectively. We first prove that every cw-expansive homeomorphism of a locally connected metric space without isolated points is meagre-expansive (but not conversely). Second that a homeomorphism of a metric space is meagre-expansive if and only if every Borel probability measure is meagre-expansive. Next that the space of meagre-expansive measures of a homeomorphism of a compact metric space X is an Fσ subset of the space of Borel probability measures equipped with the weak* topology. In the sequel we prove that every homeomorphism with a meagre-expansive measure of a compact metric space has an invariant meagre-expansive measure. Also that the set of periodic points of every meagre-expansive homeomorphism of a compact metric space has empty interior. In the circle or the interval we prove that there are no meagre-expansive homeomorphisms of the circle or the interval. Moreover, the meagre-expansive measures of an interval homeomorphism or a circle homeomorphism with rational rotation number are precisely the finite convex combinations of Dirac measures supported on isolated periodic points. A circle homeomorphism with irrational rotation number has a meagre-expansive measure if and only if it is a Denjoy map. In such a case the meagre-expansive measures are precisely those measures supported on the unique minimal set of the map. To obtain some of our results we will consider a measurable version of the classical Baire Category. © 2017 Elsevier Inc.artículohttps://www.scopus.com/inward/record.uri?eid=2-s2.0-85039792832&doi=10.1016%2fj.jmaa.2017.12.014&partnerID=40&md5=128b814a13a2bea2a23b079292719ff9
Collazos V.T., Toma Jiga E., Camaco A.C.Design and Implementation of a Graphical User Interface for a Radar SystemProceedings of the 2018 IEEE 25th International Conference on Electronics, Electrical Engineering and Computing, INTERCON 201810.1109/INTERCON.2018.8526367The current work presents the implementation of a GUI (Graphical User Interface) for a small radar system. The GUI was built using three different platforms: Matlab, Octave and Java. In this paper, we describe each of them and accomplish a comparative study of the performance of these three implementations. © 2018 IEEE.conferenciahttps://www.scopus.com/inward/record.uri?eid=2-s2.0-85058037589&doi=10.1109%2fINTERCON.2018.8526367&partnerID=40&md5=d70089ebdfafb192ee449f5bb68e69de
Jordán D., González-Chávez D., Laura D., León Hilario L.M., Monteblanco E., Gutarra A., Avilés-Félix L.Detection of magnetic moment in thin films with a home-made vibrating sample magnetometerJournal of Magnetism and Magnetic Materials10.1016/j.jmmm.2018.01.088This paper explores the optimization of an array of pick-up coils in a home-made vibrating sample magnetometer for the detection of magnetic moment in thin films. Sensitivity function of a 4-coils Mallinson configuration was numerically studied for the determination of the physical dimensions that enhance the sensitivity of the magnetometer. By performing numerical simulations using the Biot-Savart law combined with the principle of reciprocity we were able to determine the maximum values of sensitivity and the influence of the separation of the coils on the sensitivity function. After the optimization of the pick-up coils, the vibrating sample magnetometer was able to detect the magnetic moment of a 100 nm-thickness Fe19Ni81 magnetic thin film along and perpendicular to the in-plane anisotropy easy axis. The implemented vibrating sample magnetometer is able to detect changes in the magnetic moment of ?2 × 10-4 emu. © 2018 Elsevier B.V.artículohttps://www.scopus.com/inward/record.uri?eid=2-s2.0-85041549307&doi=10.1016%2fj.jmmm.2018.01.088&partnerID=40&md5=19f0d6a5336320c989ab4db9dc51dcdd
Peñaloza-Aponte D., Clemente-Arenas M.Directivity enhancement to antipodal Vivaldi antenna with slot edges using zero-index metamaterials for S-band SAR applicationIET Conference Publications10.1049/cp.2018.0541In this paper, Antipodal Vivaldi antennas with enhanced directivity using Anisotropic Zero Index Metamaterial (AZIM) are presented. These antennas are needed in order to implement a compact small Synthetic Aperture Radar (SAR) that operates at 3.35 GHz. The main goal is to enhance the antenna's directivity using AZIM with the Antipodal Vivaldi antenna with a size shorter than 3?0 (?0 is the corresponding wavelength of the operational frequency), which is a typical size in many publications. Challenges and disadvantages to carry out this research are presented. A discussion on making a comparison among three antenna prototypes where AZIM was embedded is also presented. © 2018 Institution of Engineering and Technology.All Rights Reserved.conferenciahttps://www.scopus.com/inward/record.uri?eid=2-s2.0-85057295286&partnerID=40&md5=0938ac11f7de2497821731619d4f2cc9
Sacasqui M.Double K-means methodology to determine Grey Classes in electric frequency variationProceedings of the 2018 IEEE 25th International Conference on Electronics, Electrical Engineering and Computing, INTERCON 201810.1109/INTERCON.2018.8526427This article shows how the Double K-means methodology can be used for the proper determination of grey classes over a set of electrical frequency deviation measurements. The Double K-means methodology to determine grey classes has the quality of being automated which allows the execution of its algorithm simultaneously with the input of measurements (online) or with stored measurements (offline). It is a contribution to science by the researcher as it is useful for the analysis of large amounts of oscillating data such as the electrical frequency deviation indicator and other Power Quality parameters using the Grey clustering and Entropy Weight methodology, which allows decision making or qualification of the behavior, service or phenomenon. © 2018 IEEE.conferenciahttps://www.scopus.com/inward/record.uri?eid=2-s2.0-85058057177&doi=10.1109%2fINTERCON.2018.8526427&partnerID=40&md5=78a960eace6bf9e68b6f89cb3a8930ef
Vargas W.E., Juan Quispe H.C.Economic Benefit and Improve of Stability in the Power System through the Ultra-High Speed Fault Clearing in Transmission LinesProceedings of the 2018 IEEE 25th International Conference on Electronics, Electrical Engineering and Computing, INTERCON 201810.1109/INTERCON.2018.8526425Ultra-high speed fault clearing in transmission lines is a topic that has been developing for many years. The main objective for this work is to show improve of stability of the power system and show the economic benefits through an economic dispatch that is achieved through the increase of the maximum power transfer capacity in the transmission lines, that is, it increases the capacity limit for stability in transmission lines through ultra-high speed fault clearing. For the simulation was used an electrical system as an example implemented in the software DIgSILENT and MATLAB with different events and fault clearing times from 2 cycles to 6 cycles that will compare ultra-high speed fault clearing and conventional fault clearing. These benefits allows improving the economic dispatch. © 2018 IEEE.conferenciahttps://www.scopus.com/inward/record.uri?eid=2-s2.0-85058047897&doi=10.1109%2fINTERCON.2018.8526425&partnerID=40&md5=261f3e0cfe1f0686454bbac1c2cee73a
Coneo-Rodríguez R., Baena-Moncada A., Acevedo D.F., Morales G.M., Planes G.A., Barbero C.A.Electrocatalysis of As(III) oxidation by cobalt oxide nanoparticles: measurement and modeling the effect of nanoparticle amount on As(III) oxidation potentialJournal of Solid State Electrochemistry10.1007/s10008-017-3842-6The performance of electrodes modified with electrochemically generated cobalt oxide nanoparticles for the oxidation of As(III) species was investigated by cyclic voltammetry (CV) and rotating disk voltammetry (RDV). The oxide nanoparticles were made by electrodeposition from cobalt oxides using CV without the reduction of water or anions. Controlling deposition parameters, different values of surface concentration (?) can be obtained. Electrochemical experiments (CV and RDV at different rotation rate) showed a shift in the As(III) oxidation potentials to lower values; when the coverage surface increased, these differences in the surface concentration produced a potential shift of up to 150 mV. This phenomenon depends on the ratio of the electrode active area to the geometric area (?). The Levich and Koutecký-Levich analysis of RDV voltammetric data confirmed that the oxidation of As(III) on modified electrodes is controlled by mass transport. It was also demonstrated that different values of surface concentration produces different kinetic current values. © 2017, Springer-Verlag GmbH Germany, part of Springer Nature.artículohttps://www.scopus.com/inward/record.uri?eid=2-s2.0-85039043247&doi=10.1007%2fs10008-017-3842-6&partnerID=40&md5=41362eac7ba6f737aa8e17a7a5041912
Ruiz-Córdova G.A., Khan S., Gonçalves L.M., Pividori M.I., Picasso G., Sotomayor M.D.P.T.Electrochemical sensing using magnetic molecularly imprinted polymer particles previously captured by a magneto-sensorTalanta10.1016/j.talanta.2017.12.085The determination of 1-chloro-2,4-dinitrobenzene (CDNB) was used as a proof-of-concept to a simple analytical practical configuration applying magnetic molecularly imprinted particles (mag-MIPs). Mag-MIPs were captured from an emulsion by a home-made magneto-sensor (where a small magnet was entrapped by a graphite-epoxy composite) and then, this sensor, was transferred to the solution containing the analyte, where, after binding to the mag-MIPs, the analyte was directly analysed using differential pulse voltammetry (DPV) since the magneto-sensor acted as the working electrode. After optimization, a detection limit of 6.0 ?mol L?1 with a RSD of 2.7% was achieved along with suitable recoveries and selectivity. This methodology offers a different approach for electroanalytical methodologies using mag-MIPs. © 2017 Elsevier B.V.artículohttps://www.scopus.com/inward/record.uri?eid=2-s2.0-85039955235&doi=10.1016%2fj.talanta.2017.12.085&partnerID=40&md5=6d9b6ba3b1b4be877e8fd82f4380139a
R. Berenguer, C. Quijada, A. La Rosa-Toro, E. MorallónElectro-oxidation of cyanide on active and non-active anodes: Designing the electrocatalytic response of cobalt spinelsSeparation And Purification Technology10.1016/j.seppur.2018.05.024The feasibility of the electrochemical technologies for wastewater treatment greatly relies on the design of efficient but inexpensive electrocatalysts. It is generally accepted that the so-called “non-active” anodes (like the  boron-doped diamond (BDD) or SnO2-based anodes), producing highly oxidizing hydroxyl radicals, are the most promising candidates for pollutants abatement. In this work, the electrocatalytic performance of various cobalt oxides, pure and doped with Cu or Au, for CN? oxidation has been studied and compared with that of conventional graphite, BDD, SnO2-Sb and SnO2-Sb-Pt. The metal oxide electrodes were prepared by thermal decomposition of the salt precursors onto Ti. For the M-doped Co3O4 electrodes, the nominal M/Co ratios were Cu/Co=0.07–1.00; and Au/Co=0.05–0.20. The electrodes were characterized by different techniques (XRD, SEM, EDX, XPS) and their electrocatalytic response was studied by cyclic voltammetry and galvanostatic electrolysis in a H-type cell in aqueous 0.1M NaOH. The obtained results show that the nature of the dopant plays a key role on the electrocatalytic behavior of cobalt spinels. Thus, while Cu catalyzes the CN? electro-oxidation, Au declines it. This is explained by the fact that, unlike Au (which segregates as Au-rich particles), Cu is effectively incorporated into the spinel structure by forming a solid solution (CuxCo3-xO4). In this solid solution, atomic scale Cu(spinel)-CN? specific interactions occur to catalyze the reaction, whereas in segregated Au particles the oxidation is hindered probably by a too-strong adsorption of cyanide and/or its inaccessibility to oxide active sites. Electrolysis runs have revealed that “active” over-saturated Cu-doped spinels (Cu/Co=1.00) exhibit higher current efficiencies than conventional graphite and “non-active” BDD and SnO2-based anodes. Hence, we hereby demonstrate that an inexpensive “active” electrocatalyst can show even higher efficiency than the most powerful BDD anode. These results highlight the significance of anode design in the application of the electrochemical technique for wastewater treatment.artículohttps://www.sciencedirect.com/science/article/pii/S1383586618308736
Dávalos J.Z., Valderrama-Negrón A.C., Barrios J.R., Freitas V.L.S., Ribeiro Da Silva, M.D.M.C.Energetic and Structural Properties of Two Phenolic Antioxidants: Tyrosol and HydroxytyrosolJournal of Physical Chemistry A10.1021/acs.jpca.8b00457Theoretical and experimental studies on the energetic, structural and some other relevant physicochemical properties of the antioxidant tyrosol (1), hydroxytyrosol (1OH) molecules and the corresponding radicals 1rad• and 1Orad• are reported in this work. The experimental values of the gas-phase enthalpy of formation, ?fHm0(g), in kJ·mol-1, of 1 (-302.4 ± 3.4) and 1OH (-486.3 ± 4.1) have been determined. Quantum chemical calculations, at DFT (M05-2X) and composite ab initio G3 and G4 levels of theory, provided results that served to (i) confirm the excellent consistency of the experimental measurements performed, (ii) establish that the stabilizing effect of H-bond of hydroxyethyl chain and aromatic ring (OH···? interaction) is smaller in radicals than in parent molecules, (iii) deduce - combining experimental data in isodesmic reactions - ?fHm0(g) of radicals 1rad• (-152.3 ± 4.4 kJ·mol-1) and 1Orad• (-370.6 ± 3.8 kJ·mol-1), (iv) estimate a reliable O-H bond dissociation enthalpy, BDE of 1 (368.1 ± 5.6 kJ·mol-1) and of 1OH (333.7 ± 5.6 kJ·mol-1), and (v) corroborate - using "BDE criteria" - than 1OH is a more effective antioxidant than 1. © 2018 American Chemical Society.artículohttps://www.scopus.com/inward/record.uri?eid=2-s2.0-85046032814&doi=10.1021%2facs.jpca.8b00457&partnerID=40&md5=b82aa5f69052c486c4fb92c93a3b3414
Huamán Bustamante S.G., Cavalcanti Pacheco M.A., Lazo Lazo J.G.Estimation of the displacements among distant events based on parallel tracking of events in seismic traces under uncertaintyComputers and Geosciences10.1016/j.cageo.2018.04.011The method we propose in this paper seeks to estimate interface displacements among strata related with reflection seismic events, in comparison to the interfaces at other reference points. To do so, we search for reflection events in the reference point of a second seismic trace taken from the same 3D survey and close to a well. However, the nature of the seismic data introduces uncertainty in the results. Therefore, we perform an uncertainty analysis using the standard deviation results from several experiments with cross-correlation of signals. To estimate the displacements of events in depth between two seismic traces, we create a synthetic seismic trace with an empirical wavelet and the sonic log of the well, close to the second seismic trace. Then, we relate the events of the seismic traces to the depth of the sonic log. Finally, we test the method with data from the Namorado Field in Brazil. The results show that the accuracy of the event estimated depth depends on the results of parallel cross-correlation, primarily those from the procedures used in the integration of seismic data with data from the well. The proposed approach can correctly identify several similar events in two seismic traces without requiring all seismic traces between two distant points of interest to correlate strata in the subsurface. © 2018 Elsevier Ltdartículohttps://www.scopus.com/inward/record.uri?eid=2-s2.0-85046772735&doi=10.1016%2fj.cageo.2018.04.011&partnerID=40&md5=9e421ef59baa53bf723b18d83a2a093b
Soldevilla F.R.C., Huerta F.A.C.Estimation of Transmission Lines Parameters Using Particle Swarm OptimizationProceedings of the 2018 IEEE PES Transmission and Distribution Conference and Exhibition - Latin America, T and D-LA 201810.1109/TDC-LA.2018.8511793The identification of the values with good accuracy of physical parameters of transmission systems is very important because using very different values from the real ones seriously distorts the evaluation of the planning, design, operation, maintenance and commercialization of the transmission systems. The present work describes the identification of physical parameters of a real transmission system using a mathematical model with variable values of the physical parameters. The identification is done by comparing the real operation of the system with the simulated operation of the model, varying iteratively the physical parameters values of the mathematical model. To this purpose two different techniques were applied, a classical and a modern meta-heuristic technique to 47 high voltage transmission lines of the Peruvian electrical system. The real operation is obtained from the database of the measurements of the operating variables of the transmission system. The correct values of the physical parameters will be those that correspond to the simulated operation identified. This paper is organized as follows: Section II describes the philosophy of the parameter estimation problem, here is included the symbology, the model of the transmission system, the formulation of the problem and its solution. In section III, the results of the identified parameters are presented and discussed. Finally, in section IV the conclusions are presented. © 2018 IEEE.conferenciahttps://www.scopus.com/inward/record.uri?eid=2-s2.0-85057044275&doi=10.1109%2fTDC-LA.2018.8511793&partnerID=40&md5=abc49f72e5e943f47d3a55bc7a98bcf8
Rosado-Salazar M., Dionicio-Acedo J., Flores-Mego J., Vásquez F., Cosio L., Aguirre-Velarde A.Fatty acids profile and energy content in muscle of juvenile of peruvian rock sea bass (Paralabrax humeralis) conditioned to captivity Revista de Investigaciones Veterinarias del Peru10.15381/rivep.v29i1.14196The fatty acids profile and energy content in muscle of juveniles of Paralabrax humeralis conditioned at three temperatures (12, 17 and 22 °C) for a period of 90 days was evaluated. For this purpose, 2 m3 fiberglass tanks connected to water recirculation systems with temperature control were used. The fishes were fed with commercial balanced feed (pellets) of 4 mm diameter, 42% protein and 12% fat twice a day. Every 30 days the weight and length of all fishes was recorded. In addition, six fish per acclimation temperature were sacrificed to measure fatty acids concentrations and energy content of muscle tissue. The observations showed that P. humeralis quickly accepts the artificial feed reaching a 95% survival during the evaluation period. The muscle concentration of linoleic and linolenic acids increased more than 100% in the three temperature groups. Contrarily, the concentration of docosahexaenoic acid (DHA), arachidonic acid (ARA), docosapentaenoic acid (DPA) and eicosapentaenoic acid (EPA) decreased by 48, 45, 26 and 20% respectively. The energy content in muscle increased 13% during the conditioning period. It is concluded that P. humeralis adapts quickly to the conditions of captivity; however, the feed provided must contain higher amounts of ARA, EPA, DPA and DHA. © 2018 Universidad Nacional Mayor de San Marcos. All Rights Reserved.artículohttps://www.scopus.com/inward/record.uri?eid=2-s2.0-85045919383&doi=10.15381%2frivep.v29i1.14196&partnerID=40&md5=8ecbdf037c1a6bb1756d364f794e6b2e
Le T., Tran H., Fernandez R., Solano Salinas C.J., Laal N., Bringas R., Quispe J., Segundo F., La Rosa A.H.Finite element method analysis of whispering gallery acoustic sensingJournal of Physics: Conference Series10.1088/1742-6596/1143/1/012014Whispering Gallery Acoustic Sensing (WGAS) has recently been introduced as a sensing feedback mechanism to control the probe-sample separation distance in scanning probe microscopy that uses a quartz tuning fork as a sensor (QTF-SPM) [1]. WGAS exploits the SPM supporting frame as a resonant acoustic cavity to monitor the nanometer-sized amplitude of the QTF oscillations. Optimal WGAS sensitivity depends on attaining an exact match between the cavity's frequency peak response and the TF resonance frequency. However, two aspects play against this objective: i) the unpredictable variability of the TF resonance frequency (upon attaching a SPM-probe to one of its tines), and ii) cavities of arbitrary geometry tend to display complicated (multiple peaks) frequency response, making difficult to identify which cavity dimension control which peak. Practical matching frequency procedures are needed then to operate the Shear-force Acoustic Near-field Microscopy (SANM) more efficiently. As a first step, here we undertake finite-element method (FEM) analysis to find out cavities of simple frequency response and, ideally, easy frequency tuning ability. Based on previous results we focus our studies in analyzing the frequency response of conical cavities within a range around the 32 kHz operating frequency. To first validate our numerical simulation studies, we reproduce the experimental results obtained from a specific conical cavity. Then we proceed to simulate the response of cavities of slightly different geometries, and investigate the dependence on the young modulus, poison ratio, and slight changes in dimensions. This initial success encourages to undertake studies of cavities having more sophisticated geometries. © Published under licence by IOP Publishing Ltd.conferenciahttps://www.scopus.com/inward/record.uri?eid=2-s2.0-85059446774&doi=10.1088%2f1742-6596%2f1143%2f1%2f012014&partnerID=40&md5=3fcae2841ae9be00c71b1ec295020542
Carlos L.R., Loro H., Lago A.F., Dávalos J.Z.Gas-phase proton affinity and basicity of hydroxybenzophenonesChemical Physics Letters10.1016/j.cplett.2018.10.033The gas-phase Proton Affinity (PA) and Basicity (GB) of 2-, 3- and 4-hydroxybenzophenone isomers have been experimentally determined by the Extended Kinetic Cooks Method (EKCM), using ESI-TQ Mass Spectrometry. Our results show that 4-hydroxybenzophenone isomer (PA = 912.6 ± 8.4 kJ·mol?1) is in the order of 10 kJ·mol?1 more basic than the 2- and 3-hydroxybenzophenones isomers. The results have been rationalized and discussed by means of computational DFT calculations at B3LYP/6-311++G(d,p) level of theory. © 2018artículohttps://www.scopus.com/inward/record.uri?eid=2-s2.0-85054821801&doi=10.1016%2fj.cplett.2018.10.033&partnerID=40&md5=a2af055d8db90ab7f4d493e28221b709
Garcia-Chavez G., Muñoz-Panduro E.Global control for the Furuta Pendulum based on Partial Feedback Linearization and stabilization of the Zero DynamicsIEEE International Conference on Automation Science and Engineering10.1109/COASE.2017.8256125This study presents a global hybrid controller to perform swing-up and balance for the Furuta Pendulum and the problem generated by the Zero Dynamics created when Partial Feedback Linearization is performed is solved. The device is an underactuated 2-link system with one actuator on the first link. The Dynamic Analysis is performed with Lagrange Equation. With PFL, we define a state space model where we can easily control it as a simple inverted pendulum. Then, an energy-based controller is developed to reach a neighborhood of the vertical position, and we develop a new strategy of an inclination-based controller to deal with the Zero Dynamics due to PFL keeping the pendulum near to the upright position. Finally, an LQR control is used to balance the pendulu, so the resulting hybrid control assures us global stability of the system. Results were obtained from numerical simulation. This work is important because it is a base and a reference of how to deal with Unstable Zero Dynamics of an underactuated system with PFL. © 2017 IEEE.conferenciahttps://www.scopus.com/inward/record.uri?eid=2-s2.0-85044949287&doi=10.1109%2fCOASE.2017.8256125&partnerID=40&md5=4071ffdf34f68b095eb57bffc05f6ef9
Núñez Fernández D., Kwolek B.Hand posture recognition using convolutional neural networkLecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics)10.1007/978-3-319-75193-1_53In this work we present a convolutional neural network-based algorithm for recognition of hand postures on images acquired by a single color camera. The hand is extracted in advance on the basis of skin color distribution. A neural network-based regressor is applied to locate the wrist. Finally, a convolutional neural network trained on 6000 manually labeled images representing ten classes is executed to recognize the hand posture in a sub-window determined on the basis of the wrist. We show that our model achieves high classification accuracy, including scenarios with different camera used in testing. We show that the convolutional network achieves better results on images pre-filtered by a Gabor filter. © Springer International Publishing AG, part of Springer Nature 2018.conferenciahttps://www.scopus.com/inward/record.uri?eid=2-s2.0-85042226699&doi=10.1007%2f978-3-319-75193-1_53&partnerID=40&md5=d29d8d0d23e347e68ef569395fe09e44
Mauricio A., López J., Huauya R., Diaz J.High-resolution generative adversarial neural networks applied to histological images generationLecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics)10.1007/978-3-030-01421-6_20For many years, synthesizing photo-realistic images has been a highly relevant task due to its multiple applications from aesthetic or artistic [19] to medical purposes [1, 6, 21]. Related to the medical area, this application has had greater impact because most classification or diagnostic algorithms require a significant amount of highly specialized images for their training yet obtaining them is not easy at all. To solve this problem, many works analyze and interpret images of a specific topic in order to obtain a statistical correlation between the variables that define it. By this way, any set of variables close to the map generated in the previous analysis represents a similar image. Deep learning based methods have allowed the automatic extraction of feature maps which has helped in the design of more robust models photo-realistic image synthesis. This work focuses on obtaining the best feature maps for automatic generation of synthetic histological images. To do so, we propose a Generative Adversarial Networks (GANs) [8] to generate the new sample distribution using the feature maps obtained by an autoencoder [14, 20] as latent space instead of a completely random one. To corroborate our results, we present the generated images against the real ones and their respective results using different types of autoencoder to obtain the feature maps. © Springer Nature Switzerland AG 2018.conferenciahttps://www.scopus.com/inward/record.uri?eid=2-s2.0-85054798854&doi=10.1007%2f978-3-030-01421-6_20&partnerID=40&md5=e55a2f7ce4ae4e89c576a276ec1cc424
Lopez A.M., Metzger R.J., Morales C.A.Homoclinic Orbits and Entropy for Three-Dimensional FlowsJournal of Dynamics and Differential Equations10.1007/s10884-017-9579-1We prove that every C1 three-dimensional flow with positive topological entropy can be C1 approximated by flows with homoclinic orbits. © 2017, Springer Science+Business Media New York.artículohttps://www.scopus.com/inward/record.uri?eid=2-s2.0-85011655219&doi=10.1007%2fs10884-017-9579-1&partnerID=40&md5=abbf384bf39b32cdc0eb8b041f9d295c
Lovón-Melgarejo J., Tenorio-Trigoso A., Castillo-Cara M., Miranda D.Identificación de zonas de riesgo para la Seguridad Vial mediante algoritmos de aprendizaje no supervisadoProceedings of the LACCEI international Multi-conference for Engineering, Education and TeCHIology10.18687/LACCEI2018.1.1.413The following work applies Machine Learning algorithms as a tool for a possible solution to the problem of citizen security in a South American city. This application aims to reduce the threat risk to the physical integrity of pedestrians through the geolocation, in real time, using safer places to walk. A database of free disposal for the user is the Open Data San Isidro, district of Lima, Peru, which has been used in the development of this work. This database keeps records of different accidents types (most of the automobile type) occurring in different places of this district, this data will be used to determine safe areas in the route from one place to another, decreasing the probability of suffering an accident. For this work, techniques of non-supervised learning algorithms of Clustering type: k-Means have been used. Likewise, a reduction of dimensions has previously been made using the Principal Component Analysis (PCA) techniqueconferenciahttps://www.scopus.com/inward/record.uri?eid=2-s2.0-85057447347&doi=10.18687%2fLACCEI2018.1.1.413&partnerID=40&md5=757c3becfa63fe4f1fd6b4c9ffd2f3c2
Chirinos H.D., Barra J.A., Cruz D.D., Huallpamayta G.M.Improvement of the transesterification parameters using oil blends: Crude fish oil & frying oil Periodico Tche Quimicasin DOITo improve the parameters of the transesterification process by the basic route for the production of biodiesel, crude fish oil (AP), obtained from the viscera of fish, and residual vegetable oils (AR) blenders were used. Because the AP contains high percentages of long chain polyunsaturated fatty acids that are responsible for its instability is that it was mixed with increasing percentages of AR. This translated into a higher conversion performance to biodiesel by the basic route, also depending on the level of free fatty acids. The index of methyl esters obtained from the blends and the original oils was analyzed. The calculation of the performance of each reaction is made based on the produced esters. The analysis is complemented by measuring the kinematic viscosity of the blends and the pure oils, as well as the biodiesel produced. The results showed yields higher than 90% when using the process of transesterification of the blends by the basic route. The standardization of blends by its acidity index is of great importance reaching a maximum value of 3.5 mgrKOH / gr. On the other hand, the viscosity of the biodiesel produced, from the blends, is kept within international standards; In addition, the process conditions are improved. © 2018. Porto Alegre, RS. Brasil.artículohttps://www.scopus.com/inward/record.uri?eid=2-s2.0-85051091646&partnerID=40&md5=a076087b8896ea529f7b499bee5bf8c9
Montoya M., Rivera A.Influence of neutron emission on the charge distribution of final fragments from thermal-neutron-induced fission of 233UResults in Physics10.1016/j.rinp.2018.09.039We use a Monte Carlo simulation method to calculate the effect of neutron emission on the distribution of mass, charge and kinetic energy of final fragments (after they emit neutrons) from the thermal-neutron induced fission of 233U. For the simulation input data we assume (i) the distribution of mass, kinetic energy, neutron number of primary fragments previously used to reproduce the corresponding experimental distribution of final fragments (ii) a yield of charge (for a given mass) independent of kinetic energy and equal to the corresponding to the highest kinetic energy window (cold fission, where there is no neutron emission) measured in 1988 by U. Quade et al. From the output data of simulation we obtain a yield of charge as a function of kinetic energy of final fragment which approximately reproduce the trends of experimental data obtained by those authors at different kinetic energies. © 2018 The Authorsartículohttps://www.scopus.com/inward/record.uri?eid=2-s2.0-85054158772&doi=10.1016%2fj.rinp.2018.09.039&partnerID=40&md5=186337b09918c604f9b219ba374a3125
Hu J., Romero Abujetas D., Tsoutsi D., Leggio L., Rivero F., Martín Rodríguez E., Aguilar Torres R., Sánchez-Gil J.A., Loro Ramírez H., Gallego D., Lamela Rivera H., Rivera Gil P., Alfonso F., García Solé J., Jaque D.Invited Article: Experimental evaluation of gold nanoparticles as infrared scatterers for advanced cardiovascular optical imagingAPL Photonics10.1063/1.5027907The tremendous impact that cardiovascular diseases have in modern society is motivating the research of novel imaging techniques that would make possible early diagnosis and, therefore, efficient treatments. Cardiovascular optical coherence tomography (CV-OCT) emerged as a result of such a demand, and it has already been used at the clinical level. Full utilization of CV-OCT requires the development of novel contrast molecular agents characterized by a large scattering efficiency in the infrared (800-1400 nm). Gold nanoparticles (GNPs) seem to be the best candidates, but their scattering properties in the infrared are hardly known. In most of the cases, scattering properties are extracted from numerical simulations. This knowledge gap here is covered by providing an experimental evaluation of the infrared scattering properties of different GNPs (nanoshells, nanostars, and nanorods). These GNPs display remarkable extinction coefficients in the first and second biological windows, including the particular CV-OCT wavelength. We use a unique combination of techniques (thermal loading experiments, infrared optical coherence tomography, infrared dark field microscopy, and optoacoustic spectroscopy) to experimentally determine the scattering efficiency at three different near-infrared wavelengths (808 nm, 980 nm, and 1280 nm), lying in the first and second biological windows. Consequently, this work determines experimentally the influence of particle morphology on the infrared scattering efficiency of GNPs and evidences the existence of remarkable discrepancies between experimental data and numerical simulations. © 2018 Author(s).artículohttps://www.scopus.com/inward/record.uri?eid=2-s2.0-85055401902&doi=10.1063%2f1.5027907&partnerID=40&md5=c44fc6be9f68f4c8401d07aabadeb1d5
Sal Y Rosas D., Frey D., Schanen J.-L., Ferrieux J.-P.Isolated single stage bidirectional AC-DC converter with power decoupling and reactive power control to interface battery with the single phase gridConference Proceedings - IEEE Applied Power Electronics Conference and Exposition - APEC10.1109/APEC.2018.8341078An isolated single stage bidirectional AC-DC converter with a series-connected buffer to power decoupling is proposed to interface battery with the single phase grid. None electrolytic capacitor is used in the proposed structure. The converter is a modified AC-DC DAB series-resonant single phase converter where a third active bridge is used to power decoupling and it is series-connected with the rectified grid voltage active bridge. A very practical bidirectional power decoupling technique which controls the voltage amplitude in the series-connected buffer (SCB) is proposed. Unlike existing structures, two independent time-variant duty ratios is applied on both AC active bridges (rectified grid and the series-connected buffer) and fixed duty ratio on DC side (battery). The proposed modulation allows the power decoupling of the low frequency AC grid voltage variations in the series-resonant circuit. As a result, the steady-state response of the proposed AC-DC converter with SCB is equivalent of a DC-DC DAB with a series-resonant circuit. Decoupled close loop control for the grid current and for the SCB voltage are implemented. Furthermore, reactive power in the grid is compensated in the tank circuit with fixed duty ratio on DC side. Bidirectional power flow is controlled with phase shift modulation. High efficiency is obtained due to Zero Voltage Switching (ZVS) in all MOSFETs. Finally, the 1kW prototype is validated experimentally. © 2018 IEEE.conferenciahttps://www.scopus.com/inward/record.uri?eid=2-s2.0-85046935251&doi=10.1109%2fAPEC.2018.8341078&partnerID=40&md5=fec55775e4142901ba3eb2467da5cb38
Vivasc M.C., Collado E.A.D.Jatropha oil plant for biodiesel production with a biorefinery processing perspectiveTechConnect Briefs 2018 - Advanced Materialssin DOIBiodiesel production from Jarropa Curcas in Peru is interest in the regional government of Tarapoto and other regions of Peru. The advantages of the easy cultivation of this species make it possible to maintain a supply of raw material for the production of biodiesel from Jatropha Curcas with a biorefinery processing perspective. Biodiesel can be produced at small and medium scale, having the potential to be an option for energy supply in isolated rural areas, especially in the Amazon rainforest. With the local production of biodiesel, the standard of living in rural communities can be improved, reducing migrations and fixing the rural population in the countryside. Transesterification reaction defined the production of biodiesel.conferenciahttps://www.scopus.com/inward/record.uri?eid=2-s2.0-85050859286&partnerID=40&md5=4c6856572ab59e6b77dba8ae258ff5c9
Medina-Ramos C., Carbonel-Olazabal D., Pilco-Barrenechea M.Laguerre Model to Identify Formaldehyde Pollution in the Phenolic Resin Reactors EnvironmentProceedings of the 2018 IEEE 25th International Conference on Electronics, Electrical Engineering and Computing, INTERCON 201810.1109/INTERCON.2018.8526455Nowadays, formaldehyde has become a ubiquitous element in the environment, which is also being used in the manufacture of phenolic resin by chemical reaction of phenol-formaldehyde. These processes are related to high levels of formaldehyde contamination and, consequently, to a dangerous risk to human health. To which must consider that at a global level labor and safety regulations do not yet include this gas as a human carcinogen. In this research, several tests have applied to the reactor, such that its thermal signals plus formaldehyde pollution around the environment of the reactor have been used for a successful identification by a mathematical procedure using the Laguerre functions. Another goal is to find the thermal condition that triggers formaldehyde pollution. Finally has been to find a model endowed enough capability to will be using it in pollution control tasks in such industrial facilities. © 2018 IEEE.conferenciahttps://www.scopus.com/inward/record.uri?eid=2-s2.0-85058024605&doi=10.1109%2fINTERCON.2018.8526455&partnerID=40&md5=c1c01a48ebff0c2a811e8bc490ad64b3
Amaris H., Molina Y.P., Alonso M., Luyo J.E.Loss allocation in distribution networks based on aumann-shapleyIEEE Transactions on Power Systems10.1109/TPWRS.2018.2844740This paper outlines a procedure for loss allocation in both radial and meshed distribution networks with distributed generation that could be regulated in various ways. The method is analytically developed based on the theory of electrical circuits combined with game theory based on Aumann-Shapley, which guarantees both the electrical principles and the fair axioms of game theory. The proposed method obtains unitary participation coefficients for each network user based on the currents demanded/injected by each user and the network topology. The proposed allocation method based on Aumann-Shapley has been compared with other traditional allocation methods, is adaptable to distribution networks, and shows great potential and ease of implementation. Moreover, it can be applied to any kind of distribution network (radial or meshed) with distributed energy resources. © 1969-2012 IEEE.conferenciahttps://www.scopus.com/inward/record.uri?eid=2-s2.0-85048148648&doi=10.1109%2fTPWRS.2018.2844740&partnerID=40&md5=3ba53c6813454234953ee2da855db3c9
Morales C.A., Thieullen P., Villavicencio H.Lyapunov exponents on metric spacesBulletin of the Australian Mathematical Society10.1017/S0004972717000703We use the pointwise Lipschitz constant to define an upper Lyapunov exponent for maps on metric spaces different to that given by Kifer ['Characteristic exponents of dynamical systems in metric spaces', Ergodic Theory Dynam. Systems 3(1) (1983), 119-127]. We prove that this exponent reduces to that of Bessa and Silva on Riemannian manifolds and is not larger than that of Kifer at stable points. We also prove that it is invariant along orbits in the case of (topological) diffeomorphisms and under topological conjugacy. Moreover, the periodic orbits where this exponent is negative are asymptotically stable. Finally, we estimate this exponent for certain hyperbolic homeomorphisms. © 2017 Australian Mathematical Publishing Association Inc..artículohttps://www.scopus.com/inward/record.uri?eid=2-s2.0-85030854420&doi=10.1017%2fS0004972717000703&partnerID=40&md5=c6d2e8fb7b50f9b4f1c41e19b40360ef
Vitorino H.A., Ortega P., Alta R.Y.P., Zanotto F.P., Espósito B.P.Magnetite nanoparticles coated with oleic acid: accumulation in hepatopancreatic cells of the mangrove crab Ucides cordatusEnvironmental Science and Pollution Research10.1007/s11356-018-3480-2The field of nanotechnology had enormous developments, resulting in new methods for the controlled synthesis of a wide variety of nanoscale materials with unique properties. Efficient methods such as thermal decomposition for efficient size control have been developed in recent years for the synthesis of oleic acid (OA)-coated magnetite (Fe3O4) nanoparticles (MNP-OA). These nanostructures can be a source of pollution when emitted in the aquatic environment and could be accumulated by vulnerable marine species such as crustaceans. In this work, we synthesized and characterized MNP-OA of three different diameters (5, 8, and 12 nm) by thermal decomposition. These nanoparticles were remarkably stable after treatment with high affinity iron chelators (calcein, fluorescent desferrioxamine, and fluorescent apotransferrin); however, they displayed pro-oxidant activity after being challenged with ascorbate under two physiological buffers. Free or nanoparticle iron displayed low toxicity to four types of hepatopancreatic cells (E, R, F, and B) of the mangrove crab Ucides cordatus; however, they were promptly bioavailable, posing the risk of ecosystem disruption due to the release of excess nutrients. © 2018, Springer-Verlag GmbH Germany, part of Springer Nature.artículohttps://www.scopus.com/inward/record.uri?eid=2-s2.0-85055741434&doi=10.1007%2fs11356-018-3480-2&partnerID=40&md5=5a4ce1fdd1032f1d56698c76bb867504
Jhino S., Lincol V., Josue L., Junior Q., Carlos M.Maneuverability study of a vehicle with rear wheel steeringMechanisms and Machine Science10.1007/978-3-319-67567-1_52Steering of current vehicles, forward steering, has remained quasi-constant along years. Hence, few times a vehicle with steering different, as rear wheel steering, was put under analysis. The kinematic study that happens when changing the steer to the rear position will be develop in the following paragraphs, as well as some simulations of maneuverability of a vehicle with these features. The purpose is to give to know that a vehicle with rear wheel steering has kinematic features that are advantageous against another vehicles with front wheel steering. © 2018, Springer International Publishing AG.conferenciahttps://www.scopus.com/inward/record.uri?eid=2-s2.0-85031310013&doi=10.1007%2f978-3-319-67567-1_52&partnerID=40&md5=7b0ef292f43289c8f542d28578b1509a
Lu X.-G., Betancourt M., Walton T., Akbar F., Aliaga L., Altinok O., Andrade D.A., Ascencio M., Bellantoni L., Bercellie A., Bodek A., Bravar A., Budd H., Cai T., Carneiro M.F., Chaves J., Coplowe D., Da Motta H., Dytman S.A., Díaz G.A., Felix J., Fields L., Fine R., Gago A.M., Galindo R., Gallagher H., Ghosh A., Gran R., Harris D.A., Henry S., Jena S., Jena D., Kleykamp J., Kordosky M., Le T., Maher E., Manly S., Mann W.A., Marshall C.M., McFarland K.S., McGowan A.M., Messerly B., Miller J., Mislivec A., Morfín J.G., Mousseau J., Naples D., Nelson J.K., Nguyen C., Norrick A., Nuruzzaman, Olivier A., Paolone V., Patrick C.E., Perdue G.N., Ramírez M.A., Ransome R.D., Ren L., Rimal D., Rodrigues P.A., Ruterbories D., Schellman H., Sobczyk J.T., Salinas C.J.S., Su H., Sultana M., Valencia E., Wark D., Weber A., Wolcott J., Wospakrik M., Yaeggy B., (MINERvA Collaboration)Measurement of Final-State Correlations in Neutrino Muon-Proton Mesonless Production on Hydrocarbon at E? ©=3 GeVPhysical Review Letters10.1103/PhysRevLett.121.022504Final-state kinematic imbalances are measured in mesonless production of ??+A??-+p+X in the MINERvA tracker. Initial- and final-state nuclear effects are probed using the direction of the ? - p transverse momentum imbalance and the initial-state momentum of the struck neutron. Differential cross sections are compared to predictions based on current approaches to medium modeling. These models underpredict the cross section at intermediate intranuclear momentum transfers that generally exceed the Fermi momenta. As neutrino interaction models need to correctly incorporate the effect of the nucleus in order to predict neutrino energy resolution in oscillation experiments, this result points to a region of phase space where additional cross section strength is needed in current models, and demonstrates a new technique that would be suitable for use in fine-grained liquid argon detectors where the effect of the nucleus may be even larger. © 2018 authors. Published by the American Physical Society.artículohttps://www.scopus.com/inward/record.uri?eid=2-s2.0-85049938388&doi=10.1103%2fPhysRevLett.121.022504&partnerID=40&md5=3a861b47a48aca2a94fc927748f3c23e
Patrick C.E., Aliaga L., Bashyal A., Bellantoni L., Bercellie A., Betancourt M., Bodek A., Bravar A., Budd H., Caceres G.F.R.V., Carneiro M.F., Chavarria E., Da Motta H., Dytman S.A., Díaz G.A., Felix J., Fields L., Fine R., Gago A.M., Galindo R., Gallagher H., Ghosh A., Gran R., Han J.Y., Harris D.A., Henry S., Hurtado K., Jena D., Kleykamp J., Kordosky M., Le T., Lu X.-G., Maher E., Manly S., Mann W.A., Marshall C.M., McFarland K.S., McGowan A.M., Messerly B., Miller J., Mislivec A., Morfín J.G., Mousseau J., Naples D., Nelson J.K., Norrick A., Nowak G.M., Nuruzzaman, Paolone V., Perdue G.N., Peters E., Ramírez M.A., Ransome R.D., Ray H., Ren L., Rodrigues P.A., Ruterbories D., Schellman H., Solano Salinas C.J., Sultana M., Sánchez Falero S., Teklu A.M., Valencia E., Wolcott J., Wospakrik M., Yaeggy B., Zhang D., (MINERnu A Collaboration)Measurement of the muon antineutrino double-differential cross section for quasielastic-like scattering on hydrocarbon at Eν∼3.5 GeVPhysical Review D10.1103/PhysRevD.97.052002We present double-differential measurements of antineutrino charged-current quasielastic scattering in the MINERvA detector. This study improves on a previous single-differential measurement by using updated reconstruction algorithms and interaction models and provides a complete description of observed muon kinematics in the form of a double-differential cross section with respect to muon transverse and longitudinal momentum. We include in our signal definition zero-meson final states arising from multinucleon interactions and from resonant pion production followed by pion absorption in the primary nucleus. We find that model agreement is considerably improved by a model tuned to MINERvA inclusive neutrino scattering data that incorporates nuclear effects such as weak nuclear screening and two-particle, two-hole enhancements. © 2018 authors.artículohttps://www.scopus.com/inward/record.uri?eid=2-s2.0-85044849470&doi=10.1103%2fPhysRevD.97.052002&partnerID=40&md5=d0fb805b55efbc45e5ae452dcb1cabc4
Mislivec A., Higuera A., Aliaga L., Bellantoni L., Bercellie A., Betancourt M., BodeK A., Bravar A., Budd H., Caceres G.F.R.V., Cai T., Martinez Caicedo D.A., Carneiro M.F., Chavarria E., Da Motta H., Dytman S.A., Díaz G.A., Felix J., Fields L., Fine R., Gago A.M., Galindo R., Gallagher H., Ghosh A., Gran R., Harris D.A., Hurtado K., Jena D., Kleykamp J., Kordosky M., Le T., Maher E., Manly S., Mann W.A., Marshall C.M., McFarland K.S., Messerly B., Miller J., Morfín J.G., Mousseau J., Naples D., Nelson J.K., Nguyen C., NorricK A., Nuruzzaman, Paolone V., Perdue G.N., Ramírez M.A., Ransome R.D., Ray H., Ren L., Rimal D., Rodrigues P.A., Ruterbories D., Schellman H., Solano Salinas C.J., Sultana M., Sánchez Falero S., Tagg N., Valencia E., WospakriK M., Yaeggy B., Zavala G.Measurement of total and differential cross sections of neutrino and antineutrino coherent π± production on carbonPhysical Review D10.1103/PhysRevD.97.032014Neutrino induced coherent charged pion production on nuclei, ??A??±? A, is a rare inelastic interaction in which the four-momentum squared transferred to the nucleus is nearly zero, leaving it intact. We identify such events in the scintillator of MINERvA by reconstructing |t| from the final state pion and muon momenta and by removing events with evidence of energetic nuclear recoil or production of other final state particles. We measure the total neutrino and antineutrino cross sections as a function of neutrino energy between 2 and 20 GeV and measure flux integrated differential cross sections as a function of Q2, E?, and ??. The Q2 dependence and equality of the neutrino and antineutrino cross sections at finite Q2 provide a confirmation of Adler's partial conservation of axial current hypothesis. © 2018 authors.artículohttps://www.scopus.com/inward/record.uri?eid=2-s2.0-85043390147&doi=10.1103%2fPhysRevD.97.032014&partnerID=40&md5=88fc5c98ef7f8a7cf65bfa6cdf8314f5
Aguirre C.A., Achic H.B., Barba-Ortega J.Mesoscale vortex pinning landscapes in a two component superconductorPhysica C: Superconductivity and its Applications10.1016/j.physc.2018.08.010We considered several mesoscale pinning/anti-pinning landscapes simulated with the parameter ?(T) in the Ginzburg Landau free-energy density in a mesoscopic superconducting square of size L2. We analyzed the effects of the size, local critical temperature, position and number of the pinning/anti-pinning centers on the vortex configurations and magnetic response for several values of the Ginzburg-Landau parameter ? ([1 ? ? ? 8]). We shown that the fields depends strongly on the local critical temperature, configuration and number of the defects on the sample. © 2018 Elsevier B.V.artículohttps://www.scopus.com/inward/record.uri?eid=2-s2.0-85053075642&doi=10.1016%2fj.physc.2018.08.010&partnerID=40&md5=0c0898a4038d905ba2e8a34c40f311e9
Clemente-Arenas M., Urbina J., Lakhtakia A.Metasurfaces with thermal hysteresisProceedings of the 2018 20th International Conference on Electromagnetics in Advanced Applications, ICEAA 201810.1109/ICEAA.2018.8520495As temperature cycles between 58 °C and 72 °C, VO2 undergoes a hysteretic transformation between the monoclinic phase and rutile phases, leading to a cyclical change in the complex refractive index that is indicative of semiconductor?metal transitions. We simulated the visible/near-infrared spectra of the specular reflectance and transmittance of a metasurface incorporating a VO2 sheet and found that the extrema in both spectra blueshift from the cooling to the heating phases at a fixed temperature. This phenomenon is attractive for sensing temporal gradients of temperature. © 2018 IEEE.conferenciahttps://www.scopus.com/inward/record.uri?eid=2-s2.0-85057402449&doi=10.1109%2fICEAA.2018.8520495&partnerID=40&md5=e60c5550c98c6299afd2d2265ad862cc
Cruz J.F., Cruz G.J.F., Ainassaari K., Gómez M.M., Solís J.L., Keiski R.L.Microporous activation carbon made of sawdust from two forestry species for adsorption of methylene blue and heavy metals in aqueous system -case of real polluted water Revista Mexicana de Ingeniera Quimica10.24275/uam/izt/dcbi/revmexingquim/2018v17n3/CruzActivated carbon samples were prepared and characterized from two novel forestry precursors by one-step chemical activation with ZnCl2. The adsorption capacities of the adsorbents were tested with methylene blue in monocomponent synthetic solution and with heavy metals from polluted river water. The specific surface areas (SBET) of the produced activated carbons were 1278 and 1404 m2/g. Further characterization was carried out by FTIR, RAMAN spectroscopy, XRD and FESEM analysis. The pore structure of both activated carbons was predominantly microporous with presence of mesopores. The maximum methylene blue (MB) adsorption capacities for both activated carbons were 250 mg/g and 357 mg/g. MB kinetic experiments were carried out and the influence of the initial MB concentration and the activated carbon dosage was evaluated. The samples reached removal levels close to 100% during the first 5 min of experiments with dissolved As(V) and Pb(II) in the polluted river water, reducing the concentration of these elements until levels below the local water quality standards. © 2018, Universidad Autonoma Metropolitana Iztapalapa. All rights reserved.artículohttps://www.scopus.com/inward/record.uri?eid=2-s2.0-85053010652&doi=10.24275%2fuam%2fizt%2fdcbi%2frevmexingquim%2f2018v17n3%2fCruz&partnerID=40&md5=56c979fee61ba5fb400ec6d0cd600d0a
Andrade J., Sal Rosas D., Frey D., Ferrieux J.-P.Modified triple active bridge DC/AC three-phase converter with a series-resonant LC circuit on the AC-sideProceedings - 2017 IEEE Southern Power Electronics Conference, SPEC 201710.1109/SPEC.2017.8333612A novel three-port, isolated, and single-stage DC/AC three-phase converter is proposed. This converter aims at interfacing a renewable energy source, a battery pack, and the three-phase electric grid. The battery and grid ports have bidirectional power flow capability. It is comprised of three active bridges, a HF AC-link three-winding transformer, and a series-resonant LC circuit in the AC-port. In contrast to the conventional three-port series-resonant converter, this structure only includes one LC tank, which makes it more reliable and less complex. The proposed modulation consists in phase shift control under a high and fixed switching frequency. Duty ratio depending of the grid phase is introduced on the AC-side. An extra phase angle is added to control real and reactive power transfer. This topology can be considered as the superposition of a DAB DC/DC and a series-resonant DC/AC three-phase converter. As a result, the currents flowing through the transformer's windings are quasi-sinusoidal and trapezoidal waves, which permits low rms and peak current magnitudes. Steady-state analysis, design procedure, and simulation results are presented for a 1kW converter. © 2017 IEEE.conferenciahttps://www.scopus.com/inward/record.uri?eid=2-s2.0-85049154151&doi=10.1109%2fSPEC.2017.8333612&partnerID=40&md5=cd25e9999d7385a54a511f3352c6f606
Felix R., Luyo J.Multistage Transmission Expansion Planning considering Redesign, Repowering and Technical Losses: An Application in Lima, PeruProceedings of the 2018 IEEE PES Transmission and Distribution Conference and Exhibition - Latin America, T and D-LA 201810.1109/TDC-LA.2018.8511803This paper proposes a novel approach for the transmission expansion planning (TEP) problem establishing a new mathematical DC model that allows a multistage planning considering within its formulation the calculation of technical losses of active power and the redesign and repowering of existing and added network elements. The model takes as a base the disjunctive model formulation which is then complemented with three main groups of constraints regarding the mentioned criteria. A study case is performed on a real electrical system existing in Lima, Peru where a flexible expansion plan is obtained, similar to real options valuation method, that contributes to maximize economic and technical efficiency of public and private investments in TEP. © 2018 IEEE.conferenciahttps://www.scopus.com/inward/record.uri?eid=2-s2.0-85057065617&doi=10.1109%2fTDC-LA.2018.8511803&partnerID=40&md5=8b9dd03100ffb96b793151ad2a522bed
Hipólito-Ricaldi W.S., vom Marttens R.F., Fabris J.C., Shapiro I.L., Casarini L.On general features of warm dark matter with reduced relativistic gasEuropean Physical Journal C10.1140/epjc/s10052-018-5840-yReduced relativistic gas (RRG) is a useful approach to describe the warm dark matter (WDM) or the warmness of baryonic matter in the approximation when the interaction between the particles is irrelevant. The use of Maxwell distribution leads to the complicated equation of state of the Jüttner model of relativistic ideal gas. The RRG enables one to reproduce the same physical situation but in a much simpler form. For this reason RRG can be a useful tool for the theories with some sort of a “new Physics”. On the other hand, even without the qualitatively new physical implementations, the RRG can be useful to describe the general features of WDM in a model-independent way. In this sense one can see, in particular, to which extent the cosmological manifestations of WDM may be dependent on its Particle Physics background. In the present work RRG is used as a complementary approach to derive the main observational features for the WDM in a model-independent way. The only assumption concerns a non-negligible velocity v for dark matter particles which is parameterized by the warmness parameter b. The relatively high values of b (b2? 10 - 6) erase the radiation (photons and neutrinos) dominated epoch and cause an early warm matter domination after inflation. Furthermore, RRG approach enables one to quantify the lack of power in linear matter spectrum at small scales and in particular, reproduces the relative transfer function commonly used in context of WDM with accuracy of ? 1 %. A warmness with b2? 10 - 6 (equivalent to v? 300 km/s) does not alter significantly the CMB power spectrum and is in agreement with the background observational tests. © 2018, The Author(s).artículohttps://www.scopus.com/inward/record.uri?eid=2-s2.0-85046676242&doi=10.1140%2fepjc%2fs10052-018-5840-y&partnerID=40&md5=0f15cf9ce53ac224df18e371d9edca50
Naupari D.Z., Molina Y.P., Coronel A.Optimal Sizing of Photovoltaic Systems in Distribution Networks using Particle Swarm OptimizationProceedings of the 2018 IEEE PES Transmission and Distribution Conference and Exhibition - Latin America, T and D-LA 201810.1109/TDC-LA.2018.8511782This paper presents a new method for the optimal sizing of photovoltaic systems in distribution networks, in order to reduce energy losses and improve the voltage profile. The DIgSILENT PowerFactory software, specifically the DIgSILENT programming language (DPL) was used for implementation of this method. Photovoltaic systems are modeled as constant power, and the optimization method has the ability to determine the sizing for distributed generation units. The effectiveness of the method was tested in the 60-bus insolated electrical system of Iquitos with excellent results, which are discussed and commented. © 2018 IEEE.conferenciahttps://www.scopus.com/inward/record.uri?eid=2-s2.0-85057035514&doi=10.1109%2fTDC-LA.2018.8511782&partnerID=40&md5=d65fad8a7c71414874d0a84d7f29ed49
Chirinos Collantes H.D., Perez Alarcon R.J.Optimization process parameters to obtained two-way catalyst La2O3/Cu/AlPeriodico Tche QuimicaSin DOIThe surface methodology of response to the factorial design was used to relate the catalytic activity in a two-way catalyst and the following process parameters: concentration ratio La2O3 / Cu and La2O3 / Al; matrix weight; impregnation time; the calcination temperature. The factors that influenced directly under the CO reduction efficiency were studied. The objective was to identify the process factors, which had the greatest effect, in the adition to evaluating the interaction between them. It was observed that there is an increase of 0.195%, on average of the CO reduction when the concentration ratio varies from 0.5g to 1.25g and there is an increase of 0.47%, on average, of the CO reduction when the impregnation time varies from 6h to 12h. It is also observed that the effect of the block is significant but negative, there is a significant decrease of 3,7%, in average, in the reduction of CO when using the ratio La2O3 / Al confirming that the catalyst with the aluminum metal presents higher catalytic efficiency in CO reduction. It was also observed that there is an interaction between the immersion time and the calcination temperature and that it had a synergic effect. The linear correlation was determined by the following mathematical equation: y = 2,41 + 0,04x1 + 0,18x2 ? 0,218x3 (±0, 027) (±0,055) (±0,055) (±0,055) © 2018. Porto Alegre, RS. Brasil.artículohttps://www.scopus.com/inward/record.uri?eid=2-s2.0-85051091908&partnerID=40&md5=d2ee02f9013d9adf4c9bf6d3912fb4d1
Suffredini I.B., Paciencia M.L.B., Santana B.V., Frias H.V., Alves C.D.S., Díaz I.E.C., Bernardi M.M.Phenotype behavioral impairment after the administration of Xylopia aromatica to male Balb-c mice and cytotoxicity to breast and cancer cell linesPharmacognosy Magazine10.4103/pm.pm_373_17Background: Crude extract obtained from the stem of Xylopia aromatica (Annonaceae, EB149) known as pimenta-de-macaco, a traditional Brazilian medicinal and edible plant, showed cytotoxicity against leukemia cell lines. Despite the initial findings, no information regarding its influence on behavioral phenotype (BP) has been previously reported. Objective: The objective was to assess the effect on EB149 on BP in male mice and to perform a bioguide-fractionation aimed at the verification of the cytotoxic potential against breast and prostate cancer cell lines. Materials and Methods: BP was assessed by observation in an open cage and subsequent analysis in an open field (OF) at 15, 30, 60, 120, and 180 min, after intraperitoneal administration of X. aromatica, in a two-stage experimental delineation. Results: EB149 impaired general activity, piloerection, defecation, breathing, auricular and corneal reflexes, tail squeeze, response to touch, hindquarter fall, surface-righting reflex, body tone, and grip reflex in the first stage. In the second stage, general activity, tail squeeze, touch response, and breathing were impaired, and a decrease in locomotion frequency in OF was also observed. All behavioral changes were recovered during the period of experiment in both stages. The LD50 of EB149 was 1.944 g/kg. Two fractions obtained from EB149 named FSIST, which contains sitosterol and stigmasterol as major compounds, and total alkaloid fraction, which contains total alkaloids, showed cytotoxicity against breast and prostate cancer cell lines. Conclusions: The traditional plant X. aromatica EB149 organic extract showed cytotoxicity against breast and prostate cancer cell lines and the recovery of behavioral impairment related to general activity, tail squeeze, touch response, breath, and locomotion frequency, causing no harm to male lab mice. © 2018 Pharmacognosy Magazine | Published by Wolters Kluwer-Medknow.artículohttps://www.scopus.com/inward/record.uri?eid=2-s2.0-85053510127&doi=10.4103%2fpm.pm_373_17&partnerID=40&md5=2d9f6d80be3485f59904f37918bbad90
Colorado M., Bedrinan M.F.Planning of must-run units and optimal load shedding to maintain the security in power systemsProceedings of the 2018 IEEE PES Transmission and Distribution Conference and Exhibition - Latin America, T and D-LA 201810.1109/TDC-LA.2018.8511699Determining generation units that provide security to the system under normal operating conditions and contingencies is a task of the planner to avoid emergencies. It is more critical when the system is operated with local areas with reduced voltage support. This work presents a practical method based on the monitoring of the security of the system in points of its load duration curve to determine the generation units to beput into service by reliability, named ReliaUility Must Run (RMR) units. For this, a Security Constrained Optimal Power Flow (SCOPF) is formulated as economic dispatch and solved using genetic algorithms (GA), which incorporates constraints such as voltage limits in load Uus, reactive power limits in generation and power flows limits in the lines. Likewise, power dispatch ofthe RMR units to cover the local area for non-severe contingencies and load shedding to avoid the collapse in this area under severe contingencies is required. A payment mechanism for reactive power support is included through a reactive power band of generators. © 2018 IEEE.conferenciahttps://www.scopus.com/inward/record.uri?eid=2-s2.0-85057002830&doi=10.1109%2fTDC-LA.2018.8511699&partnerID=40&md5=2e9048c2a4ef4ec0b6e889f6cf397b1a
Paredes-Doig A.L., Sun-Kou M.D.R., Picasso-Escobar G., Doig-Camino E., Rosa-Toro A.L.Preparation, characterization, and application of Pd-SnO sensors as an electronic nose in peruvian wine classification and its comparison with chromatographic techniques Revista Colombiana de Quimica10.15446/rev.colomb.quim.v47n1.63070SnO-based sensors doped with palladium (0, 1, 3, 5 and 7%) were prepared by the wet impregnation method. To characterize them, the techniques ofinfrared spectroscopy with Fourier transform (FTIR), adsorption and desorption of N2 (BET), XRD, scanning electron microscopy (SEM), and X-ray dispersive energy (EDX) spectroscopy were used. The sensors were evaluated with ethanol to form, together with two commercial sensors, an electronic nose (E-nose) that could detect volatile aroma components in Peruvian wines. The results were interpreted through principal component analysis (PCA) to find a technique that complemented the information collected by gas chromatography (GC) and liquid chromatography (HPLC), and by comparing the PCAs obtained from GC, and HPLC with those resulting from E-nose. It was found that the latter classified the samples better. It was possible to differentiate both wines from the same grape and from a different strain, and to detect adulterated wines, which contributes to the wine industry in controlling its production to improve the quality of this drink for the consumer. © 2018, Universidad Nacional de Colombia. All rights reserved.artículohttps://www.scopus.com/inward/record.uri?eid=2-s2.0-85042049723&doi=10.15446%2frev.colomb.quim.v47n1.63070&partnerID=40&md5=a8a24f9c746122536f35ac607dec439e
Ygnacio-Espinoza A., Penaloza-Aponte D., Alvarez-Montoya J., Mesco-Quispe A., Clemente-Arenas M.Quasi-transparent meshed and circularly polarized patch antenna with metamaterials integrated to a solar cell for S-band CubeSat applicationsProceedings of the 2018 20th International Conference on Electromagnetics in Advanced Applications, ICEAA 201810.1109/ICEAA.2018.8520522This study presents a quasi-transparent circularly polarized patch antenna integrated to a solar cell using metamaterial. The disadvantages and challenges related to patch antennas and solar cell integration are point out. Then, in order to compensate these detriments to antenna performance metamaterials with reactive impedance surface (RIS) are proposed. A report of the benefits introduced by these elements is shown. Finally, in order to accomplish quasi- transparency, the antenna is meshed adding slots where the currents densities are insignificant. A final prototype with a meshing that do not influence the antenna parameters was achieved and their features are presented. © 2018 IEEE.conferenciahttps://www.scopus.com/inward/record.uri?eid=2-s2.0-85057409046&doi=10.1109%2fICEAA.2018.8520522&partnerID=40&md5=99b93e64840293ba359c286f05ac3071
Borja Borja M.G.Real-time operating system to control multiple industrial plants through process schedulingProceedings of the LACCEI international Multi-conference for Engineering, Education and TeCHIology10.18687/LACCEI2018.1.1.496This paper presents a proposal to implement a real-time operating system for control of industrial plants by applying scheduling process control in real time. The scheduling process plant control is performed using as input data the duration of the process and the sampling time of control systems. The round robin algorithm does not allow the execution of tasks in real time to control industrial plants since the essential condition is that the process must be run each time sampling and round robin exactly running in a queue order process. To resolve this we use a schedule previously planned using the sampling time and duration of process in relative time of slice and during the planning phase of the ready queue processes for execution on the processor the real time process is entered into the queue as a high priority process. It is introduced a real-time process with higher priority than other processes round robin algorithm to execute the process until it finishes its execution. The main objective of this work is to solve real-time processes run exactly each sampling time is reached because without delays are placed in the run queue of ready processes and executed to complete the entire process. © 2018 Latin American and Caribbean Consortium of Engineering Institutions. All rights reserved.conferenciahttps://www.scopus.com/inward/record.uri?eid=2-s2.0-85057442212&doi=10.18687%2fLACCEI2018.1.1.496&partnerID=40&md5=8bc26d4e86acd85f96d7987fc1c3020a
Nuruzzaman, Perdue G.N., Ghosh A., Wospakrik M., Akbar F., Andrade D.A., Ascencio M., Bellantoni L., Bercellie A., Betancourt M., Vera G.F.R.C., Cai T., Carneiro M.F., Chaves J., Coplowe D., Motta H.D., Díaz G.A., Felix J., Fields L., Fine R., Gago A.M., Galindo R., Golan T., Gran R., Han J.Y., Harris D.A., Jena D., Kleykamp J., Kordosky M., Lu X.-G., Maher E., Mann W.A., Marshall C.M., McFarland K.S., McGowan A.M., Messerly B., Miller J., Nelson J.K., Nguyen C., Norrick A., Nuruzzaman N., Olivier A., Patton R., Ramírez M.A., Ransome R.D., Ray H., Ren L., Rimal D., Ruterbories D., Schellman H., Salinas C.J.S., Su H., Upadhyay S., Valencia E., Wolcott J., Yaeggy B., Young S.Reducing model bias in a deep learning classifier using domain adversarial neural networks in the MINERvA experimentJournal of Instrumentation10.1088/1748-0221/13/11/P11020We present a simulation-based study using deep convolutional neural networks (DCNNs) to identify neutrino interaction vertices in the MINERvA passive targets region, and illustrate the application of domain adversarial neural networks (DANNs) in this context. DANNs are designed to be trained in one domain (simulated data) but tested in a second domain (physics data) and utilize unlabeled data from the second domain so that during training only features which are unable to discriminate between the domains are promoted. MINERvA is a neutrino-nucleus scattering experiment using the NuMI beamline at Fermilab. A-dependent cross sections are an important part of the physics program, and these measurements require vertex finding in complicated events. To illustrate the impact of the DANN we used a modified set of simulation in place of physics data during the training of the DANN and then used the label of the modified simulation during the evaluation of the DANN. We find that deep learning based methods offer significant advantages over our prior track-based reconstruction for the task of vertex finding, and that DANNs are able to improve the performance of deep networks by leveraging available unlabeled data and by mitigating network performance degradation rooted in biases in the physics models used for training. © 2018 IOP Publishing Ltd and Sissa Medialab.artículohttps://www.scopus.com/inward/record.uri?eid=2-s2.0-85057619219&doi=10.1088%2f1748-0221%2f13%2f11%2fP11020&partnerID=40&md5=109dab0280345f61658e5dfe73202551
Villanueva A.M.Relocation of hardware tasks across networked partially reconfigurable FPGASProceedings of the 2017 Electronic Congress, E-CON UNI 201710.1109/ECON.2017.8247305Partially reconfigurable (PR) field-programmable gate arrays (FPGAS) partition the FPGA into one static region and multiple PR regions (PRRs). This partitioning enables hardware multitasking in the PRRs, where preemption/resumption of hardware tasks requires saving/restoring the preempted task's execution context with the possibility of relocating the task's context to another PRR. Prior works address the involved challenges, providing partial solutions and imposing limitations that prevent portability of relocating tasks across networked PR FPGAS. In this work, a portable solution for flexible task preemption/resumption/relocation across networked PR FPGAS is introduced, where experimental results evaluate these operations, enabling system designers to tradeoff task/PRR granularity based on application requirements. © 2017 IEEE.conferenciahttps://www.scopus.com/inward/record.uri?eid=2-s2.0-85049566907&doi=10.1109%2fECON.2017.8247305&partnerID=40&md5=d1d5b4d1deba49adab8738ebcf287a56
Reyes R., Cremona M., Brito H.F.Room temperature molecular electrophosphorescence detection in organic LEDs with (Gd, Eu)-β-diketonate complexes blendOptical Materials10.1016/j.optmat.2018.07.062In this work is reported the fabrication and characterization of the triple-layer electroluminescent organic devices using a mixture of the gadolinium and europium ?-diketonate complexes [GdxEuy(TTA)3 (TPPO)2] as emitting layer. The OLED devices contained the 1-(3-methylphenyl)-1,2,3,4-tetrahydroquinoline-6-carboxyaldehyde-1,1?-diphenylhydrazone (MTCD) as hole-transporting layer and tris(8-hydroxyquinoline aluminum) (Alq3) as electron transporting layer. The electroluminescence spectra present emission narrow bands from 5D1 ? 7F1,2 and 5D0 ? 7F0,1,2,3,4 transitions characteristics of the Eu3+ ion. These sharp lines are overlapped with a broad band attributed to the electrophosphorescence due to the T1 ? S0 transition from TTA ligand. The intermolecular energy transfer from Gd-chelate to Eu-chelate is discussed based on this electrophosphorescence appearance. © 2018 Elsevier B.V.artículohttps://www.scopus.com/inward/record.uri?eid=2-s2.0-85050817207&doi=10.1016%2fj.optmat.2018.07.062&partnerID=40&md5=7326aeca475c02d6c8dc5175fe1d79b1
Urday E.E., Tello J.G.Search for eclipsing binary stars in the direction of galaxy bulga with data of ogle-II and macho cataloguesJournal of Physics: Conference Series10.1088/1742-6596/1143/1/012009It is known that the parameters of a simple star (radii, temperatures, masses) are obtained from the study of eclipsing binary systems. With the eclipsing binaries of the OGLE catalogue, we look for their counterparts in the MACHO catalogue, that is, the same binaries that are contained in the second catalog. As a result, we will generate our own catalogue of eclipsing binaries with photometric information in three filters I, R and V. © Published under licence by IOP Publishing Ltd.conferenciahttps://www.scopus.com/inward/record.uri?eid=2-s2.0-85059482809&doi=10.1088%2f1742-6596%2f1143%2f1%2f012009&partnerID=40&md5=148225a5a65878d1d8373c0d35306fb3
Blancas J., Noel J.Short-Term Load Forecasting Using Fuzzy LogicProceedings of the 2018 IEEE PES Transmission and Distribution Conference and Exhibition - Latin America, T and D-LA 201810.1109/TDC-LA.2018.8511751In this paper, fuzzy logic (FL) is applied to the problem of short-Term load forecasting (next day) in electrical power systems. To achieve this, it is necessary to select the historical data to be used and pre-process them using the c-means method, grouping them according to power levels (MW) to define the number of membership functions (MFs) to the fuzzy system, which is very important for the calculation of the lowest forecast error; finally, the historical data are entered into the fuzzy system implemented in MATLAB. This methodology is applied to predict the daily electrical load (demand) of the Peruvian Electrical System using the historical data of the actual demand executed for the study period and by calculating the MAPE error. It is shown that the FL offers better results than the conventional methodology for the forecast of the electrical load. © 2018 IEEE.conferenciahttps://www.scopus.com/inward/record.uri?eid=2-s2.0-85057053462&doi=10.1109%2fTDC-LA.2018.8511751&partnerID=40&md5=bed2ef13447aa35294fff4e2d8d12fe7
Sacasqui M., Luyo J.Simulation Study of a GPC Controller for a Hydroelectric Plant during Electric FaultsProceedings of the 2018 IEEE PES Transmission and Distribution Conference and Exhibition - Latin America, T and D-LA 201810.1109/TDC-LA.2018.8511654This paper presents the simulation study where the classic speed controller of a hydraulic power unit has been replaced with an unrestricted generalized predictive controller. The model of the power plant includes an excitation system, subsystem (speed controller, servo motor and turbine), load 1, load 2, Three-phase Transformer, External Grid and Fault. The electric three-phase fault has 0.1 seconds of duration. The results are compared with the responses of a conventional proportional integrative and derivative controller. The library of simulation developed by MathWorks 'Power-Turbine'(Simulink) and for Matlab is used, also this research includes the steps for modify the library and so adapt it for our purposes. © 2018 IEEE.conferenciahttps://www.scopus.com/inward/record.uri?eid=2-s2.0-85057008979&doi=10.1109%2fTDC-LA.2018.8511654&partnerID=40&md5=1106494870dd4344d009b3572522aa76
Sal Rosas D., Andrade J., Frey D., Ferrieux J.-P.Single stage isolated bidirectional DC/AC three-phase converter with a series-resonant circuit for V2G2017 IEEE Vehicle Power and Propulsion Conference, VPPC 2017 - Proceedings10.1109/VPPC.2017.8330898An isolated bidirectional series-resonant DC/AC three-phase converter with a single-stage power conversion for V2G applications is proposed in this paper. It is comprised of two active bridges, a series-resonant LC tank and a HF transformer which provides the galvanic isolation between the DC and AC ports. The modulation strategy consists in duty ratio and phase-shift control under a high and fixed switching frequency, which allows high power density. Unlike existing structures, duty ratio control is performed on the AC side. This approach allows the converter to be designed as an equivalent series-resonant DC/DC converter. With the proposed modulation, reactive and real power open loop control is feasible. Efficiency and performance are compared with the existing Dual Active Bridge (DAB) structure, whose main energy transfer element is the leakage inductance of the HF transformer. For this purpose, analysis of the current flowing through the LC tank is developed. Finally, simulation results are presented to confirm the mathematical predictions. © 2017 IEEE.conferenciahttps://www.scopus.com/inward/record.uri?eid=2-s2.0-85048746241&doi=10.1109%2fVPPC.2017.8330898&partnerID=40&md5=5ae7f374bc8c0e97f2810e38dee3b1a7
Borja Borja M.G.Sistema de posicionamiento con visión artificial para un brazo robótico articulado de seis grados mediante redes neruonales artificialesProceedings of the LACCEI international Multi-conference for Engineering, Education and TeCHIology10.18687/LACCEI2018.1.1.498El posicionamiento de un brazo robótico se realiza utilizando sensores en las articulaciones conjuntamente con algoritmos de cálculo de la posición basados en la cinemática inversa utilizando principios geométricos que dependen de la configuración geométrica de brazo robótico lo que hacen sistemas costos. En este trabajo se propone una solución para posicionar el brazo robótico usando cámaras de cualquier tipo y aplicando redes neuronales artificiales que tras un proceso de aprendizaje con muestras capturadas mediante las cámaras posiciona el brazo robótico de seis grados de libertad. Los resultados obtenidos mediante el prototipo desarrollado en Visual C# con una cámara web y un brazo robótico demuestran que la solución propuesta es independiente del tipo de cámara, no se requiere sensores de posición en las articulaciones, no depende del tamaño del robot y tampoco se requiere de cálculos matemáticos para posicionar el brazo robótico de seis grados de libertad. De esta manera si cambiamos el tamaño del brazo robótico y la cámara solo es necesario realizar el proceso de aprendizaje correspondiente para que el sistema pueda realizar el posicionamiento.conferenciahttps://www.scopus.com/inward/record.uri?eid=2-s2.0-85057493895&doi=10.18687%2fLACCEI2018.1.1.498&partnerID=40&md5=787b036db1f7dc93906d789170a8ed40
Delgado A., Motellanos P., Rosario E., Zuloaga L.Social Impact Assessment on a Renewable Energy Project: A Case Study in PeruProceedings of the 2018 IEEE PES Transmission and Distribution Conference and Exhibition - Latin America, T and D-LA 201810.1109/TDC-LA.2018.8511693Some energy projects became in causes of possible social conflicts during its implantation; in this way and in order to prevent social conflicts, it should conduct a social impact assessment (SIA) before developing an energy project. In this work, we conducted a social impact assessment on a renewable energy project in Lima, Peru, by applying of the grey systems theory. In the case study, four stakeholder groups and five evaluation criteria, for SIA, were identified. Consequently, the results showed that the energy project would have a positive social impact from the point of the view affected population. In addition, the criterion more valuated by population under analysis, was the impact on the research. Moreover, the method applied in this study showed interesting results that could help to authorities from university under study and local authorities to make the best decision about the energy project. In addition, the method could be used to assess social impact from other type of energy projects. © 2018 IEEE.conferenciahttps://www.scopus.com/inward/record.uri?eid=2-s2.0-85057012313&doi=10.1109%2fTDC-LA.2018.8511693&partnerID=40&md5=46542adf28e91b5b5e6a4d85d74c178b
Martínez-Alonso M., Busto N., Aguirre L.D., Berlanga L., Carrión M.C., Cuevas J.V., Rodríguez A.M., Carbayo A., Manzano B.R., Ortí E., Jalón F.A., García B., Espino G.Strong Influence of the Ancillary Ligand over the Photodynamic Anticancer Properties of Neutral Biscyclometalated IrIII Complexes Bearing 2-Benzoazole-PhenolatesChemistry - A European Journal10.1002/chem.201803784In this paper, the synthesis, comprehensive characterization and biological and photocatalytic properties of two series of neutral IrIII biscyclometalated complexes of general formula [Ir(C^N)2(N^O)], where the N^O ligands are 2-(benzimidazolyl)phenolate-N,O (L1, series a) and 2-(benzothiazolyl)phenolate-N,O (L2, series b), and the C^N ligands are 2-(phenyl)pyridinate or its derivatives, are described,. Complexes of types a and b exhibit dissimilar photophysical and biological properties. In vitro cytotoxicity tests conclusively prove that derivatives of series a are harmless in the dark against SW480 cancer cells (colon adenocarcinoma), but express enhanced cytotoxicity versus the same cells after stimulation with UV or blue light. In contrast, complexes of type b show a very high cytotoxic activity in the dark, but low photosensitizing ability. Thus, the ancillary N^O ligand is the main factor in terms of cytotoxic activity both in the dark and upon irradiation. However, the C^N ligands play a key role regarding cellular uptake. In particular, the complex of formula [Ir(dfppy)2(L1)] (dfppy=2-(4,6-difluorophenyl)pyridinate) [3 a] has been identified as both an efficient photosensitizer for 1O2 generation and a potential agent for photodynamic therapy. These capabilities are probably related to a combination of its notable cellular internalization, remarkable photostability, high photoluminescence quantum yield, and long triplet excited-state lifetime. Both types of complexes exhibit notable catalytic activity in the photooxidation of thioanisole and S-containing aminoacids with full selectivity. © 2018 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheimartículohttps://www.scopus.com/inward/record.uri?eid=2-s2.0-85056000121&doi=10.1002%2fchem.201803784&partnerID=40&md5=1d979eacff54b717b6c5735ce57e10cc
Quiliano M., Pabón A., Moles E., Bonilla-Ramirez L., Fabing I., Fong K.Y., Nieto-Aco D.A., Wright D.W., Pizarro J.C., Vettorazzi A., López de Cerain A., Deharo E., Fernández-Busquets X., Garavito G., Aldana I., Galiano S.Structure-activity relationship of new antimalarial 1-aryl-3-susbtituted propanol derivatives: Synthesis, preliminary toxicity profiling, parasite life cycle stage studies, target exploration, and targeted deliveryEuropean Journal of Medicinal Chemistry10.1016/j.ejmech.2018.04.038Design, synthesis, structure-activity relationship, cytotoxicity studies, in silico drug-likeness, genotoxicity screening, and in vivo studies of new 1-aryl-3-substituted propanol derivatives led to the identification of nine compounds with promising in vitro (55, 56, 61, 64, 66, and 70–73) and in vivo (66 and 72) antimalarial profiles against Plasmodium falciparum and Plasmodium berghei. Compounds 55, 56, 61, 64, 66 and 70–73 exhibited potent antiplasmodial activity against chloroquine-resistant strain FCR-3 (IC50s < 0.28 ?M), and compounds 55, 56, 64, 70, 71, and 72 showed potent biological activity in chloroquine-sensitive and multidrug-resistant strains (IC50s < 0.7 ?M for 3D7, D6, FCR-3 and C235). All of these compounds share appropriate drug-likeness profiles and adequate selectivity indexes (77 < SI < 184) as well as lack genotoxicity. In vivo efficacy tests in a mouse model showed compounds 66 and 72 to be promising candidates as they exhibited significant parasitemia reductions of 96.4% and 80.4%, respectively. Additional studies such as liver stage and sporogony inhibition, target exploration of heat shock protein 90 of P. falciparum, targeted delivery by immunoliposomes, and enantiomer characterization were performed and strongly reinforce the hypothesis of 1-aryl-3-substituted propanol derivatives as promising antimalarial compounds. © 2018 Elsevier Masson SASartículohttps://www.scopus.com/inward/record.uri?eid=2-s2.0-85046730511&doi=10.1016%2fj.ejmech.2018.04.038&partnerID=40&md5=861a83247c3a6972e85cb00b15a5acd8
Lovón-Melgarejo J., Castillo-Cara M., Bravo-Rocca G., Orozco-Barbosa L., García-Varea I.Supervised learning algorithms for indoor localization fingerprinting using BLE4.0 beacons2017 IEEE Latin American Conference on Computational Intelligence, LA-CCI 2017 - Proceedings10.1109/LA-CCI.2017.8285716The increasing interest on deploying ubiquitous context-based services has spurred the need of developing indoor localization mechanisms. Such systems should take advantage of the large amount of wireless networks and radio interfaces already incorporated in most mobile consumer devices. Among the existing radio interfaces, Bluetooth Low Energy (BLE) 4.0 is called to play a major role in the deployment of energy efficient ubiquitous services. In this paper, we first show that the high sensitivity of BLE4.0 to fast fading makes infeasible the use of radio propagation models to directly estimate the distance between a reference transmitter and the mobile device. We then explore the use of supervised learning algorithms towards the development of radio maps of beacons analysing in-depth two metrics accuracy and mean error. Our approach also explores two main parameters: (i) Transmission power (Tx) of the BLE4.0 beacons; and (ii) Physical characteristics of the area. Based on our results, we argue that the mean error can be improved up to 28% configuring the two main parameters. © 2017 IEEE.conferenciahttps://www.scopus.com/inward/record.uri?eid=2-s2.0-85050383658&doi=10.1109%2fLA-CCI.2017.8285716&partnerID=40&md5=a0e98d4914fd207a7234a45f027de202
Huamani G.T., Alca E.Supply chain management in the development of learning objectsEDUNINE 2018 - 2nd IEEE World Engineering Education Conference: The Role of Professional Associations in Contemporaneous Engineer Careers, Proceedings10.1109/EDUNINE.2018.8450985This paper describes the application of supply chain management (SCM) in the development of learning objects (LO) for students of Engineering. It is implemented in three stages. At the first stage are identified the learning styles (LS) of students according to Felder and Soloman in order to increase the users satisfaction. In the second one, Agile Method is applied to reduce the time of development of learning objects, and in the third one, the selection of providers of repositories is visualized, as well as other resources inherent in the management of digital contents because this depends on the strategies adopted by the University. © 2018 IEEE.conferenciahttps://www.scopus.com/inward/record.uri?eid=2-s2.0-85053884224&doi=10.1109%2fEDUNINE.2018.8450985&partnerID=40&md5=c184cb6b7af695624dd42d51858b5f6a
Adriano B., Fujii Y., Koshimura S., Mas E., Ruiz-Angulo A., Estrada M.Tsunami Source Inversion Using Tide Gauge and DART Tsunami Waveforms of the 2017 Mw8.2 Mexico EarthquakePure and Applied Geophysics10.1007/s00024-017-1760-2On September 8, 2017 (UTC), a normal-fault earthquake occurred 87 km off the southeast coast of Mexico. This earthquake generated a tsunami that was recorded at coastal tide gauge and offshore buoy stations. First, we conducted a numerical tsunami simulation using a single-fault model to understand the tsunami characteristics near the rupture area, focusing on the nearby tide gauge stations. Second, the tsunami source of this event was estimated from inversion of tsunami waveforms recorded at six coastal stations and three buoys located in the deep ocean. Using the aftershock distribution within 1 day following the main shock, the fault plane orientation had a northeast dip direction (strike = 320 ?, dip = 77 ?, and rake = - 92 ?). The results of the tsunami waveform inversion revealed that the fault area was 240 km × 90 km in size with most of the largest slip occurring on the middle and deepest segments of the fault. The maximum slip was 6.03 m from a 30 × 30 km2 segment that was 64.82 km deep at the center of the fault area. The estimated slip distribution showed that the main asperity was at the center of the fault area. The second asperity with an average slip of 5.5 m was found on the northwest-most segments. The estimated slip distribution yielded a seismic moment of 2.9 × 10 21 Nm (Mw = 8.24), which was calculated assuming an average rigidity of 7 × 10 10 N/m2. © 2017, The Author(s).artículohttps://www.scopus.com/inward/record.uri?eid=2-s2.0-85040225884&doi=10.1007%2fs00024-017-1760-2&partnerID=40&md5=e677a65bd640a8db571bc3d24d670f36
Arce J., Guccione J.A., Guccione J.J., Valqui C.Twisted Tensor Products of K n with K mAlgebras and Representation Theory10.1007/s10468-018-9833-1We find three families of twisting maps of Km with Kn, where K is a field, and we make a detailed study of its properties. One of them is related to truncated quiver algebras, the second one consists of deformations of the first and the third one requires m = n and yields algebras isomorphic to Mn(K). © 2018, Springer Nature B.V.artículo in Presshttps://www.scopus.com/inward/record.uri?eid=2-s2.0-85057844682&doi=10.1007%2fs10468-018-9833-1&partnerID=40&md5=e904b37b2244a1e9f43b874ce39537e0
Cruz G.J.F., Pirilä M., Mat?ová L., Ainassaari K., Solis J.L., Fajgar R., Šolcová O., Keiski R.L.Two Unconventional Precursors to Produce ZnCl2-Based Activated Carbon for Water Treatment ApplicationsChemical Engineering and Technology10.1002/ceat.201800150Two unconventional raw materials, the seeds from Spondias purpurea L. (red mombin) and Inga edulis (ice cream bean), were characterized and used as precursors to produce good-quality zinc chloride-activated carbons for potential use in water treatment applications. The red mombin seed was significantly more porous than the ice cream bean seed, while the activated carbons prepared from red mombin seed and ice cream bean seeds showed both a very well-established microporous-mesoporous structure. Equilibrium as well as kinetic adsorption experiments were conducted with methylene blue, methyl orange, and As(V). It was revealed that both seeds are unconventional, renewable, cheap, and suitable agro-precursors for production of activated carbons with potential application in wastewater treatment. © 2018 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheimartículohttps://www.scopus.com/inward/record.uri?eid=2-s2.0-85050268092&doi=10.1002%2fceat.201800150&partnerID=40&md5=c652c49859b14b0e63f8f859527a7b9e
Villena Chávez J.A.Water quality and sustainable development Revista Peruana de Medicina Experimental y Salud Publica10.17843/rpmesp.2018.352.3719Water quality is an essential ecological value for health and economic growth. In Peru, due to its mineralogical nature by the presence of the Andean Mountain System and its economy dependent on the extraction of minerals, conditions exist for the dispersion of chemical contaminants, especially metals, which can reach the drinking water, causing a generalized exposure of the population to a chronic risk that is already becoming unmanageable. Pollution of watersheds exposes people to cadmium in the northern part of the country, to lead in the central regions, and to arsenic in the south. Physical-chemical treatment is becoming increasingly expensive for drinking water companies. In this context, the socio-environmental conflicts have evidence through the presence of heavy metals in the blood that is enough to generate adverse climates for the economy and delay in investments, resulting in a vicious circle that is difficult to resolve. The analysis of the two causes: mineralogical nature and mining extraction, must be deepened to achieve an adequate solution that prioritizes people’s health, but also promotes investments for economic growth. The objective of this review is to motivate Health Authorities to address the problem and to develop risk communication strategies so that the problem can be addressed in a cost-effective manner through health education, while at the same time continuing to make progress in the development of more eco-efficient mining technologies. © 2018, Instituto Nacional de Salud. All rights reserved.artículohttps://www.scopus.com/inward/record.uri?eid=2-s2.0-85053017303&doi=10.17843%2frpmesp.2018.352.3719&partnerID=40&md5=94017ab090d4163d5754fbb27f5c8a64
Lu J.  Lu E.  Zuloaga L.  Zarate B.ADN de Filosofía Lean y TOC para Desarrollar, Innovar y Mejorar ProcesosProceedings of the LACCEI international Multi-conference for Engineering, Education and TeCHIology10.18687/LACCEI2018.1.1.434Investigación de carácter exploratorio. Análisis y revisión de fundamentos, principios definiciones y conceptos en torno de la ADN de la Filosofía Lean y La Teoría de Restricciones, para Desarrollar, Innovar y Mejorar cualquier Proceso.  El PROBLEMA es ¿Cómo? Desarrollar, Innovar y Mejorar Procesos, aplicando el TPS - Sistema de Producción Toyota y TOC para mejoramiento y la innovación en la gestión de los procesos de las operaciones transformativas y productivas, en la creación e intercambio de valor y beneficios. CONCLUSIONES: La Investigación expuso que la mejora continua en todo, se logra, enfocándose en mejorar el flujo para incrementar la velocidad con que crea y entrega valor el sistema, es la base o el ADN del TPS y TOC, para lo cual bastaría con identificar el valor meta (truput) por unidad de tiempo que está creando el sistema, así como cuál es la restricción (cuello de botella o problema) que limita la capacidad, para luego desarrollar innovaciones y mejoras, que aumenten el trúput, aplicando los 4 principios seguidos por Ohno y los 5 pasos de TOC. Descriptores: ADN del Lean, Filosofía Lean, Innovación Lean, Proceso Lean, Proceso TOC, Desarrollo Lean, Competitividad Lean, TOC para Innovar, TOC para Desarrollar, TOC para la competitividad, Desarrollar Competitividad, Desarrollar innovación, Desarrollar Procesos. Innovar Procesosconferenciahttp://www.laccei.org/LACCEI2018-Lima/full_papers/FP434.pdf
de Oliveira M.J.F.  Toscano L.N.P.An integrated Emergency Care Delivery System for major eventsOperations Research for Health Care10.1016/j.orhc.2018.01.002The objective of this paper is to evaluate the Emergency Care Delivery System of the city of Rio de Janeiro in view of recent urban and natural disasters that are happening everywhere and to support the organizer Committee of RIO 2016 Olympic Games. The goal is to discuss the effectivity of an intelligent decision support system that involves three public agencies: The Control Centre of the ambulance service, the Municipal Traffic Engineering Company and the Centre for Internal Regulation of public hospitals. The model is based upon the information flow focusing on the high complexity patients. The emergency care delivery system is modeled by distributed discrete event simulation. Several models have been developed for the emergency care namely: The call center, the medical regulation, the ambulance dispatching and routing, the care on the scene and the interaction with emergency medical services. The rescue unit displacement is modeled by a routing algorithm. The algorithm has interactive knowledge bases for data searching with a specific heuristic for the emergency scene. The routing is a specific model that may be used in displacements when dramatic changes happen very quickly and it is impossible to use conventional routes or the public data network. The project is directed towards the integration of different emergency services with issues related to patients’ well-being and combines the results of previous initiatives that were developed by other members of an existing research group at the Federal University of Rio de Janeiro.artículohttps://www.sciencedirect.com/science/article/abs/pii/S2211692316301722
Nahui-Ortiz J.  Quillos-Ruiz S.A.  Escalante-Espinoza N.J.Análisis de emisiones de vehículos en función a su antigüedad, en Chimbote-PeruProceedings of the LACCEI international Multi-conference for Engineering, Education and TeCHIology10.18687/LACCEI2018.1.1.521En la presente investigación se realiza una evaluación de los motores encendido por chispa de 4 tiempos, utilizando como combustible gasolina de 90 octanos y vehículos  convertidos para utilizar GLP. Siendo el parque automotor de 100 hp en promedio de 6765 unidades, para lo cual se midieron las emisiones de CO y CO2 clasificados en cuatro rangos de antigüedad de 22.2% de 0-5 años, 47.3% entre 5 a 10 años, 26.6% entre 10 a 15 años y los mayores a 15 años el 3.9%. Las emisiones del CO en unidades que utilizan gasolina de 90 octanos y GLP presentan altas emisiones en ralentí que superan el límite máximo permisible (LMP) de 0.5%, pero al aumentar las rpm disminuyen, teniendo a 3500 rpm un valor de CO menor a 0.5% y cumplen con LMP, dando menores emisiones los motores gasolineros con respecto a los que utilizan GLP. Asimismo las emisiones de CO2, es baja en ralentí pero aumentado las rpm del motor gasolinero y los de GLP, se mejora el CO2 a los 3500 rpm; lográndose  valores aceptables, siendo más consistentes en los gasolineros sobre los que operan con GLP, llegando a valores superiores al 10% de CO2. Principalmente las emisiones más bajas los dan las unidades gasolineras menores a 10 años de antigüedad. Keywords-- Emisiones, monóxido de carbono, dióxido de carbono, combustible. conferenciahttp://www.laccei.org/LACCEI2018-Lima/meta/FP521.html
González L.F.   Dávila E.S.M.  Camarena Y.V.  Sono W.M.Análisis del comportamiento del flujo vehicular y nivel de servicio de la Av. Javier Prado - Lima, PerúProceedings of the LACCEI international Multi-conference for Engineering, Education and TeCHIology10.18687/LACCEI2018.1.1.409Congestion and saturation of vehicles on the main roads of the city of Lima is a problem difficult to understand because the many facets and variables that cause it. Based on the collection of data from various cameras filming located in the area of Javier Prado avenue, stretch from Aviacion avenue to Evitamiento highway, it had been performed an analysis of some variables which ones we have tried to monitor, diagnose and analyze the behavior in this way, and their service level. The proposals variables to analyze are: vehicular intensity, demand for vehicles, average speed, capacity of the road, track geometry, lane change maneuver, Types of vehicles, number of lanes and Traffic Density. From the analysis of these variables and their interaction can we give some conclusions about the most influential variables in traffic congestion, the service level of the road, in addition to understanding the phenomenon. Keywords- Congestion, Traffic intensity, vehicle speed, lane change maneuvers, Vehicular Density, Av Javier Prado, characteristics curve.conferenciahttp://www.laccei.org/LACCEI2018-Lima/full_papers/FP409.pdf
Lezama J.  Schweitzer P.  Weber S.  Tisserand E.  Joyeux P.Appliances Modeling and Simulation: A Virtual Platform Applied for Arc Fault TestingProceedings of the 2018 IEEE PES Transmission and Distribution Conference and Exhibition - Latin America, T and D-LA 201810.1109/TDC-LA.2018.8511672This study is devoted to the development of a virtual electric network composed by linear and nonlinear household appliances, the supply voltage and an arc fault which can be inserted in series or in parallel in the line. The configuration and composition of the entire device can be changed at will. This virtual platform is used to the establishment of a current and line voltage signatures database for the development of an arc fault detector. We describe in this paper some load modeling using both Matlab/simulink (for the performed universal motor model) and SimPowerSystem block (for the supply voltage, wires and arc models). The simulation platform presented includes a vacuum cleaner, a discharge lamp, a drill and an electric arc fault. Validation criteria of the different models are based on the comparison of the harmonic distortion (frequency characteristic) and the calculus of the index of agreement (time characteristic). The experimental results obtained validate the models for single and combined loads in the presence or not of an arc in series in the electric line.conferenciahttps://ieeexplore.ieee.org/document/8511672
Vásquez Mazzotti D.  Alvarado L.  Puga R.  Loro H.Calibration of remote nanothermometers using nanoparticles of NaYF4: Er3+, Yb3+, Nd3+Journal of Physics: Conference Series10.1088/1742-6596/1143/1/012023The nanoparticles of NaYF4: Er3+, Yb3+, Nd3+ present fluorescent emissions by upconversion. These emissions are associated with the doping ions of Er, Yb and Nd in the NaYF4 nanoparticles. The nanoparticles of NaYF4 doped with Er3+ and Yb3+ ions produce upconversion radiation when excited by 980 nm wavelength laser. By incorporating the Nd3+ ions, the NaYF4: Er3+, Yb3+, Nd3+ arrangement is formed, which produces the same excitation with an 880 nm wavelength laser, the product of a cross-transfer process between the Nd, the Yb and the Er. For applications in human tissue it is preferable to use a 880 nm wavelength laser. These nanoparticles of NaYF4: Er3+, Yb3+, Nd3+ have been synthesized in our laboratories with Y (79,3%), Yb (18%), Er (2%) and Nd (0,7%). In this work we have studied the fluorescence behavior of these nanoparticles, which correspond to the transitions 2H11/2 → 4I15/2 y 4S3/2 → 4I15/2, and that can be used in the calibration of a remote nanothermometer, because they have a sensitivity to very small changes in temperatureconferenciahttps://iopscience.iop.org/article/10.1088/1742-6596/1143/1/012023
Cori W.  Tello J.Cataclysmic variable stars: Photometry of V893 Sco star and spectroscopy of HS 0220 + 0603 starJournal of Physics: Conference Series10.1088/1742-6596/1143/1/012010Differential photometry was applied on V893 Sco star, observed from the Astronomical Observatory of the Universidad Nacional de Ingeniería in Peru. From its light curve it was measured an orbital period of 0.076 days approximately. Moreover, spectroscopic analysis was performed on the HS 0220 + 0603 star, which data was acquired from a database. A fitting program was written in Python to find, out of several synthetic spectra of white dwarf and templates of red dwarf, the combination of a white dwarf and a red dwarf spectrum that fits best the HS 0220 + 0603 spectrum, thus we found that this spectrum is a composition of a white dwarf spectrum of 30000 K and surface gravity (log g) = 8.0, and a M5.5 type red dwarf star.conferenciahttps://iopscience.iop.org/article/10.1088/1742-6596/1143/1/012010
Salazar C.M.C.  Ferrer L.D.P.Clúster PINE64: Construcción y comparación del rendimiento con otros clústeres de la universidadProceedings of the LACCEI international Multi-conference for Engineering, Education and TeCHIology10.18687/LACCEI2018.1.1.468Este trabajo describe las especificaciones y la construcción del clúster de minicomputadores PINEA64 llamado “PINE64” por el nombre de la empresa que fabrica estas placas. Evalúa y compara el consumo energético y tiempos calculados en la ejecución de programas entre diferentes clústeres. Los programas que se considera son: El cálculo del valor de PI y el cálculo de la cantidad de primos y primo mayor que hay en un intervalo de 0 a 1000 millones de números. Palabras clave—clúster de computadores, pineA64, arquitectura arm, nodo maestro, nodo esclavo, programación paralela.conferenciahttp://www.laccei.org/LACCEI2018-Lima/meta/FP468.html
Menacho L.  Carrasco M.  Ayala Z.Comparison between Monolayer and Bilayer Graphene energy bands using the Tight Binding modelJournal of Physics: Conference Series10.1088/1742-6596/1143/1/012022The Tight Binding model is used to describe the electronic energy band structures of the monolayer and bilayer graphene. The "creation" and "annihilation" quantum operators are employed to compute the respective Hamiltonians. From this, two and four energy bands were respectively obtained. These computations are an attempt to show a unifying approach representing both cases.conferenciahttps://iopscience.iop.org/article/10.1088/1742-6596/1143/1/012022
Risco-Castillo M.Diseño de instrumentos electrónicos mediante bloques de lógica reconfigurable y herramientas libresProceedings of the LACCEI international Multi-conference for Engineering, Education and TeCHIology10.18687/LACCEI2018.1.1.374Este artículo presenta el desarrollo y uso de librerías y herramientas de software que pueden emplearse para construir diferentes instrumentos electrónicos básicos, como osciloscopios, generador de ondas, registrador de datos, instrumentos personalizados, etc. utilizando la flexibilidad y el poder de un dispositivo avanzado de lógica reconfigurable (FPGA). Las bibliotecas y herramientas tienen un enfoque de diseño modular para que sea fácilmente adaptable a diferentes fabricantes de hardware y tipos de FPGA, El software de código abierto de PC y el lenguaje de descripción de hardware (HDL) utilizado para configurar el FPGA son fácilmente extensibles para agregar funcionalidades o aplicaciones. El uso de la arquitectura SBA permite tiempos cortos de desarrollo y un bajo consumo de recursos. Palabras Clave -- Instrumentos virtuales, sistemas reconfigurables, FPGA, VHDL, SBAconferenciahttp://www.laccei.org/LACCEI2018-Lima/full_papers/FP374.pdf
Canelo C.  Tocto P.Diseño de un modelo basado en redes neuronales en la nube para determinar el riesgo de crédito en los solicitantes de microcrédito en el mercado financiero de PerúProceedings of the LACCEI international Multi-conference for Engineering, Education and TeCHIology10.18687/LACCEI2018.1.1.504Las entidades crediticias siempre han tenido el problema de controlar el riesgo de crédito al que se exponen al desarrollar sus operaciones crediticias, en tal sentido, siempre han requerido apoyarse en modelos predictivos que les ayuden a tomar decisiones acertadas para la aceptación o el rechazo de una solicitud de crédito. Los modelos predictivos de microcrédito que emplean las instituciones financieras para calificar a los solicitantes de crédito, son los conocidos modelos clásicos basados en técnicas estadísticas y los modelos basados en técnicas de inteligencia artificial. Estos modelos difieren en la cantidad de factores que requieren, en las técnicas que emplean y en la precisión de la predicción. En este estudio, se utilizó redes neuronales supervisadas, implementándose tres redes neuronales, para decidir si se acepte o se rechaza la solicitud de crédito. Las redes neuronales se entrenaron con los datos de una entidad micro-financiera, que constaba de 15,569 casos, cada uno de ellos tenía 20 atributos. Para crear las redes neuronales se utilizó Microsoft Azure Machine Learning Studio, software disponible en la nube, mediante el cual se obtuvieron los ratios de eficiencia y error, que permitieron elegir el mejor modelo de predicción. El modelo elegido se puede utilizar en la automatización de la evaluación de la solicitud de crédito de los clientes de las financieras. Keywords-- Microcredit; Credit score; Credit risk; Data mining; Cloudconferenciahttp://www.laccei.org/LACCEI2018-Lima/meta/FP504.html
Amador F.V.  Kuong J.L.  López W.E.Dissociation of carbon links by microwave plasmatic energy and power for waste transformationProceedings of the LACCEI international Multi-conference for Engineering, Education and TeCHIology10.18687/LACCEI2018.1.1.429Herein, we analyzed the molecular dissociation of carbon links using plasma radiation energy. This is a destructive method that is employed for the disposal of organic waste, particularly those species that have carbon bonds with a toxic nature and negative environmental impact. We evaluated the physical and chemical conditions to break the carbon links and foster molecular interactions into a process that results in either useful products or harmless substances that are disposable. We proposed a novel technique to quantitatively evaluate the reduction in the quantity of carbon bonds in a sample by direct radiation without plasma thermal action. This makes it possible to generate gasification mechanisms that could produce harmless gaseous products in an energy transformation process. Plasma radiation energy production is based on the interaction between microwave radiation passing through absorbing antennas. At high temperatures, a thermal activity occurs during this interaction, with the absorbing antennas acting as electromagnetic sinks and an action–reaction process generating plasma energy that is released to the surroundings as a thermal dart and radiation. Liquid samples under assay was exposed by using plasma radiation component of this source only; passing the sample through a filter simultaneously, in which we introduce the concept of mechanical disaggregating system. This system acts as a digester by transforming carbon molecules and other substances into less polluting compounds. We used a mixture of cyanide dissolved in water as an assay sample, coming from a mine waters, which was subjected to the plasma radiant component and studied this energy generated acting over the purification and transformation of samples. Keywords-- Energy Plasma, Plasma molecular dissociation, Mechanical disaggregating system, Plasma reactor, Cyanide decompositionconferenciahttp://www.laccei.org/LACCEI2018-Lima/meta/FP429.html
Calcina E.  Tello J.C.Do we live in an under-dense region?Journal of Physics: Conference Series10.1088/1742-6596/1143/1/012008According to the Cosmological Principle, matter structures and radiation are expected to be homogeneously and isotropically distributed in the universe at sufficiently large scales. An open question in observational cosmology is to estimate the size of such scale from the data. In the case of the cosmic background radiation, it seems clear that such scale corresponds to the horizon scale at matter-radiation decoupling, that is, at ~ 1°, but the problem is still open for the size of the homogeneity scale. But, due to the growth of structures in the evolving universe the homogeneity scale depends on the redshift of the data in analyses. Here we study this problem for data in the local universe by analyzing the 21cm HI-line sources using the public catalog ALFALFA, with median redshift 〈z〉 = 0.025. We use the scaled counts-in-spheres method to establish the approximate size of the homogeneity scale in the local universe. In this analysis one compares the data sample with respect to a randomly generated homogenous sample. Defining the scale of transition to homogeneity as the scale at which the scaled counts-in-spheres estimator reaches the limiting value 1 within 1%, we find that this transition scale is rH  69 Mpc, in excellent accordance with what is expected considering that the HI-line sources come from low-mass blue galaxies which have an anti-bias b with respect to the matter fluctuation field (with b  0.48 − 0.68 depending on the composition of the sample), from which one expects a transition scale in the local universe of 56 conferenciahttps://iopscience.iop.org/article/10.1088/1742-6596/1143/1/012008/meta
Falconí R.Establecimiento de la metodología para el diseño, implantación, evaluación y sostenibilidad de Rúbricas, que aseguren los resultados educativos en estudiantes (ABET). Caso Rúbricas en los cursos de la Especialidad de Ingeniería IndustrialProceedings of the LACCEI international Multi-conference for Engineering, Education and TeCHIology10.18687/LACCEI2018.1.1.438Se ha establecido una metodología que ha permitido constatar que la Facultad de Ingeniería Industrial y Sistemas considera como rúbricas de medición del nivel alcanzado por las competencias en los cursos a: i) los sílabos, ii) las prueba de entrada e informe respectivo, iii) informe final, iv) Proyecto de Fin de Carrera - Proyecto de Diseño Capstone-, aquí se han identificado que se carece de sistematización y articulación de estos instrumentos, aunque se debe destacar las evidencias integradoras de las competencia como la participación de los alumnos en la feria de proyectos y congresos diversos - CONEII, CLEIN y CODE. Por otro lado los encuestados - alumnos, docentes y egresadosevidencian con sus valoraciones que están satisfechos con el nivel alcanzado en la mayoría de las competencias. Estos resultados refuerzan significativamente la decisión de continuar con las acciones de mejora continua de la calidad de los procesos de enseñanza aprendizaje considerada dentro del Ciclo Interno - de los dos ciclos propuestos por el ABET-, y establecer los mecanismos internos orgánicos que faciliten, aseguren y sostengan la obtención de las competencias –específicas y transversalesalineadas con los Objetivos Educacionales. Keywords— Rúbricas, Competencias, Habilidades, Capstone, ABET, Ingenieríaconferenciahttp://www.laccei.org/LACCEI2018-Lima/meta/FP438.html
Velloso V. Nozaki L.  Tapia D.  Cioffi M.O.  Oliveira R.  Barboza M.  Voorwald H.Fatigue behavior of Ti-6Al-4V alloy modified by plasma immersion ion implantation: Temperature effect.MATEC Web of Conferences10.1051/matecconf/201816514001This research studied Ti-6Al-4V alloy behavior with two (2) different microstructure subjected to nitrogen addition by PIII treatment, with and without sample heating, under cyclic load. PIII conditions, at 390 °C, were DC voltage of 9.5 kV, frequency of 1.5 kHz and pulse of 40 µs. PIII conditions, with sample heating at 800 °C, were 7 kV, 0.4 kHz and 30 µs. Axial fatigue tests were performed on untreated and treated samples for resistance to fatigue comparison. The untreated Ti-6Al-4V had an annealed microstructure, PIII treatment at 390 °C resulted in a microstructure that has no nitride layer or diffusion zone. In the PIII treatment at 800 °C, the microstructure presented nitride layer and diffusion zone. Resistance to fatigue decreased with PIII treatments in both temperatures. At 390 °C, the treatment created deformation regions and cracks on surface due to nitrogen implantation that formed solid solution with titanium and imposed lattice strains on the crystal lattice. At 800 °C, bulk ductility decrease, increasing of αTi proportion in microstructure due to α case formation and the presence of a ceramic layer dropped fatigue resistance of Ti-6A-4V alloy.conferenciahttps://www.matec-conferences.org/articles/matecconf/abs/2018/24/matecconf_fatigue2018_14001/matecconf_fatigue2018_14001.html
Morales W.  Porlles J.  Rodriguez J.  Taipe H.  Arguedas A.First unconventional play from Peruvian northwest: Muerto formationSPE/AAPG/SEG Unconventional Resources Technology Conference 2018, URTC 201810.15530/urtec-2018-2903064Currently, many operators, including some of the major industry leaders, are venturing into and taking advance of the Unconventional E&P business, however there are not an Unconventional Resource Assessment in Peru, South America. The purpose of this work is to assess the Muerto Formation, which is presumed to be the main source rock for the Lancones Basin, Peruvian Northwest, as the First Unconventional Reservoir Play in this country. Being one of the main contributions adding value to the data of existing works since more than 100 years of hydrocarbon exploration; and making it possible with a minimum investment. The general process starts with a compilation and analysis of existing bibliographic material on the area, which would help to mark off the study area and its relationship with the adjacent basins and Oil & Gas fields. After that, there was performed a screening taking in account expert opinion and the available data of geochemistry, field geology and ease of access to the area. Given the success of the First Phase, the seismic stratigraphic interpretation was continued, which generated an stratigraphic and structural model, aiming to know the geohistory of the Lancones Basin; and the geochemical interpretation of the data from outcrops and the well Abejas 1X, with which the geochemical properties of organic matter, thermal maturation and hydrocarbon abundance were evaluated, in order to determine the hydrocarbon potential of the source rock; and during all of the process, feedback was always made as more data was available. During the third and last phase for the purpose of this work, it was rebuilded the stratigraphic sequences by geohistory, in order to develop a burial model to determine the Kitchen extension and the Oil&Gas windows distribution.This possible unconventional reservoir, is characterized as Platform and Talud marine deposits the Shale Gas Unconventional Deposits are usually from marine or lake sediments. However, organic matter can be found in distal or proximal sediments and in different sedimentary systems a marine deposit with different depositional sequences and environments. Therefore, its organic content, as well as lithology, changes across its areal and vertical distribution.conferenciahttps://www.onepetro.org/conference-paper/URTEC-2903064-MS
Castillo-Cara M.  Huaranga-Junco E.  Quispe-Montesinos M.  Orozco-Barbosa L.  Antúnez E.A.FROG: A Robust and Green Wireless Sensor Node for Fog Computing PlatformsJournal of Sensors10.1155/2018/3406858Over the past few years, we have witnessed the widespread deployment of wireless sensor networks and distributed data management facilities: two main building blocks of the Internet of things (IoT) technology. Due to the spectacular increase on the demand for novel information services, the IoT-based infrastructures are more and more characterized by their geographical sparsity and increasing demands giving rise to the need of moving from a cloud to a fog model: a novel deployment paradigm characterized by the provisioning of elastic resources geographically located as close as possible to the end user. Despite the large number of wireless sensor networks already available in the market, there are still many issues to be addressed on the design and deployment of robust network platforms capable of meeting the demand and quality of fog-based systems. In this paper, we undertake the design and development of a wireless sensor node for fog computing platforms addressing two of the main issues towards the development and deployment of robust communication services, namely, energy consumption and network resilience provisioning. Our design is guided by examining the relevant macroarchitecture features and operational constraints to be faced by the network platform. We based our solution on the integration of network hardware platforms already available on the market supplemented by smart power management and network resilience mechanisms.artículohttps://new.hindawi.com/journals/js/2018/3406858/
Huancco I.J.M.Geant4 simulation of the dual phase Time Projection Chamber TPC of argon to detect neutrinosJournal of Physics: Conference Series10.1088/1742-6596/1143/1/012011The present work describes the simulation carried out in Geant4 of a Time Projection Chamber TPC of argon that uses not only a dual-phase technology (liquid and gas) but also PhotoMultiplier tubes PMT for the detection of scintillation caused by the interaction of charged particles with argon. Furthermore, the optoelectronic characteristics of the PMT are analyzed. This allows the study of particles production through the neutrino-nucleus interactionsconferenciahttps://iopscience.iop.org/article/10.1088/1742-6596/1143/1/012011
Leon Hilario L.M.  Aldo Arroyo E.Improved variational method that solves the energy eigenvalue problem of the hydrogen atomJournal of Physics: Conference Series10.1088/1742-6596/1143/1/012031In most quantum mechanics textbooks for graduate studies, the hydrogen atom is studied in an approximate way by means of the variational method. The type of trial functions commonly used are the Gaussian and the Lorenzian. In this paper we consider a natural generalization of the Mei method to improve the trial wave functions [1] applied to hydrogen atom. We propose a sequence of functions as trial wave functions to calculate the eigen-energies of the hydrogen atom. These trial wavefunctions are given in terms of three variational parameters, one of them is fixed by means of the normalization condition and the other two are adjustable parameters. One of these parameters can be chosen as being an integer number, then this parameters will define the sequence of functions. We will show that when the integer parameter approaches to infinity, the ground state, first excited state and second excited state converge to the exact resultsconferenciahttps://iopscience.iop.org/article/10.1088/1742-6596/1143/1/012031
Gutierrez J.F.  Bedrinana M.F.  Castro C.A.Integration of the Synthetic Dynamics Power Flow Equations with the Optimal MultiplierProceedings of the 2018 IEEE PES Transmission and Distribution Conference and Exhibition - Latin America, T and D-LA 201810.1109/TDC-LA.2018.8511746This work proposes a new scheme for the solution of the Synthetic Dynamics Power Flow (SDPF) method. The integration of the SDPF equations requires an implicit technique, hence, the mixed Adams-BDF algorithm was chosen. As the original version of SDPF presented some problems to solve some well- and ill- conditioned cases and diverged for unsolvable cases, a modification based on the polar form of the optimal multiplier (OM) from the Load Flow with Step Size Optimization (LFSSO) was proposed and tested. The choice of the OM was supported by its reported ability to solve ill-conditioned cases and capability to indicate the unsolvability of a power system. The new modified SDPF was tested with some IEEE benchmark cases, four practical cases as well as three reported illconditioned networks. Index Terms—Power flow, ill-conditioned systems, Newton-Raphson’s method, optimal multiplier, synthetic dynamics modeling, implicit integration.conferenciahttps://www.semanticscholar.org/paper/Integration-of-the-Synthetic-Dynamics-Power-Flow-Guti%C3%A9rrez-Bedri%C3%B1ana/b028d6845d05622bb819b057e4485efcf32de175
Nahui-Ortiz J.Introduction of hydrogen produced by renewable energy into the peruvian electricity marketProceedings of the LACCEI international Multi-conference for Engineering, Education and TeCHIology10.18687/LACCEI2018.1.1.481Hydrogen energy is considered as the fuel of the future and it is already being introduced in the energy markets of more developed regions; however, it remains uncertain its potential impact in developing countries such as Peru. On the other hand, the Peruvian energy sector has being growing during the last decade but electricity production has also been shifting from a renewable energy source, such hydropower toward a fossil fuel namely natural gas. The paper examines the potential for hydrogen production from solar and wind power and also the potential substitution of natural gas by hydrogen produced by renewable energy sources. A potential carbon emission reduction is also estimated as a preliminary approach. Keywords – Hydrogen Production, Renewable Energy / Peruvian Market / Electricity Generation / Carbon Emissionsconferenciahttps://www.semanticscholar.org/paper/Introduction-of-Hydrogen-produced-by-Renewable-into-Nahui-Ortiz/8f4855bca2039e477e8ebc5b1006923f901b7a1e
Ferreira H.  Poma G.  Acosta D.R.  Barzola-Quiquia J.  Quintana M.  Barreto L.  Champi A.Laser power influence on Raman spectra of multilayer graphene, multilayer graphene oxide and reduced multilayer graphene oxideJournal of Physics: Conference Series10.1088/1742-6596/1143/1/012020In this work, the influence of laser power on Raman spectra on different carbon based materials was studied: multilayer graphene (MLG), multilayer graphene oxide (MLGO) and reduced multilayer graphene oxide (rMLGO). The presence of oxygen and hydrogen was verified by means of Fourier-transform Infrared Spectroscopy, indicating that our oxidation and reduction process was success in our multilayers graphene. Through the position and width of the band G, we discuss the effects of the incorporation of oxygen by the graphene matrix in terms of thermal expansion and doping effects. The ID/IG ratio was used to determine the presence of defects and showed a similar behavior for MLGO and rMLGO demonstrating a feature of partial reduction and reduction effects caused by the power supplied by laser.conferenciahttps://iopscience.iop.org/article/10.1088/1742-6596/1143/1/012020
Zorrilla L.A.V.  Lezama J.Low-power embedded readout and processing system for ISFET sensors as measurement devices9th IEEE Latin American Symposium on Circuits and Systems, LASCAS 2018 - Proceedings10.1109/LASCAS.2018.8399929Ion Sensitive Field Effect Transistors (ISFETs) have been widely used in different applications because of its rapid response and robustness. There are many structures of conditioning circuits proposed for ISFETs oriented to specific applications and a integrated solutions. This paper, proposes a completely embedded readout circuit and processing system to employ them as part of pH monitoring systems. The implementation was performed in the mixed signal microcontroller PSoC 5LP, with a classical constant-current and constant-voltage structure (CVCC) of 25µA and 300mV. Results shows a sensibility of 51mV/pH at 25◦C and a compensated output with +/- 0.02pH of tolerance and 0.02 of resolution. Index Terms—ISFET, PSoC, readout circuit, processing, temperature compensationconferenciahttps://ieeexplore.ieee.org/document/8399929
Jan A.U.  Contreras V.  Jan V.U.Loyalty in education as a businessProceedings of the LACCEI international Multi-conference for Engineering, Education and TeCHIology10.18687/LACCEI2018.1.1.388This paper examines variables that influence on students’ loyalty in education at the university. The causes of students’ intention to stay and intention to recommend are identified. The instrument used is a questionnaire based on previous studies, from which finally 23 questions are obtained and measured. Correlation between variables confirms the influence of quality and social influence on customer satisfaction and loyalty. Quality is perceived by the student as academic quality and administrative quality. Students’ intention to stay and intention to recommend are identified as a behavior of loyalty. The research was done among students at private universities in Lima, Peru. Public universities were not included. Economic factors and costs were not included. To improve loyalty in education, Quality of the product and Quality of the service are relevant. Quality of the service means quality of academic and administrative service. Loyalty in education, as in any other business, is necessary to keep clients, in this case students. Administrative and academic authorities must devote resources to improve customer satisfaction and reputation. Loyalty is understood and measured as intention to stay and intention to recommend. The authors did not find similar studies in Peru. Keywords: Loyalty, intention to recommend, intention to stay, electronic word of mouth (eWOM).conferenciahttps://www.semanticscholar.org/paper/Loyalty-in-Education-as-a-Business-Jan-Contreras/eb6f6990f29b8d4bfacb7578e4b68ea4aefd73eb
Mosquera L.  Basurto Pinao J.Monitoring of stresses and deformations in soils by fiber optic sensorsProceedings of the LACCEI international Multi-conference for Engineering, Education and TeCHIology10.18687/LACCEI2018.1.1.416This paper shows the application of LPG optical fiber sensors to the determination of the transmitted stress and deformation of a sample of confined soil subjected to surface loads. The transmitted stress was measured by a mechanical LPG pressure sensor and the curvature of the ground by permanent LPG sensors buried at depths of 0.1m; 0.2m; 0.4m and 0.6m. Clay-sandy soil characteristic of UNICAMP was deposited in a cylinder of 0.8m in length and 0.30m in diameter. The soil was lightly compacted in 0.2m layers and an LPG sensor was installed on each layer. Surface loads of up to 227 KPa were applied to the surface of the soil, measuring axial soil deformations of less than 3mm by our sensors with sensitivities of the order of 0.22 mm/dB. The values of the modulus of elasticity for this type of soil were determined from the fitting of the Boussinesq equations with the values measured by the buried LPG sensors. A Young's modulus of 5.40 MPa and a Poisson's coefficient ν = 0.52 were determined for this type of soil. Keywords-- Soil stress, elastic constants, fiber optic sensors, LPG gratings, geotechnical monitoringconferenciahttps://easychair.org/publications/preprint/CfWR
Jara A.N.L. Carvalho J.F.  Júnior A.F.  Maia L.J.Q.  Santana R.C.On the optical and magnetic studies of YCrO3 perovskitesPhysica B: Condensed Matter10.1016/j.physb.2018.07.026In this paper we studied the Electron Paramagnetic Resonance (EPR) and Optical spectroscopies of mono disperse yttrium chromite (YCrO3) nanoparticles prepared by a modified polymeric precursor method. The particles crystallized in roughly spherical shape with size ranging from 100 to 200 nm. Diffuse reflectance spectrum exhibited very well defined bands related to the 4A2 → 4T2, 4A2 → 4T1, 4A2 → 2T1, 4A2 → 2E transitions, characteristic of Cr3+ (3d 3 , 2D5/2) ions in nearly octahedral symmetry. The crystalline field Dq, Racah parameters (B and C) and Dq/B, could be determined and the results indicated that Cr3+ ions are in a strong ligand field site. The EPR spectra of YCrO3 shows a single broad resonance in the whole range of temperature studied, 100 to 300 K. Combining optical and EPR results the effective g-values of the paramagnetic Cr3+ were estimated to be 1.97 and 1.98, respectively, typical of Cr3+ in orthorhombic crystal field environment. The onset of the antiferroparamagnetic transition, TN~140 K, attributed to Cr3+ -Cr3+ exchange interaction (J = -41.5 cm-1) was determinate by means of Magnetization and EPR measurements. The results were discussed in terms of the magnetic short-rang spin-spin exchange interaction between pairs of Cr3+artículohttps://www.sciencedirect.com/science/article/abs/pii/S0921452618304745
Pumallica-Paro M.A.  Luis Arizaca-Cusicuna J.  Clemente-Arenas M.Optimizing Cutoff Frequency in an Antipodal Vivaldi Antenna for GPR applications through a novel balunProceedings of the 2018 IEEE 25th International Conference on Electronics, Electrical Engineering and Computing, INTERCON 201810.1109/INTERCON.2018.8526432In this work, an ultra-bandwidth antenna (UWB) is proposed for applications in ground penetrating radar (GPR). A novel Vivaldi antipodal antenna (AVA) with elliptical slot at the edges (ESE) made with FR4 is presented. The antenna was optimized by adjusting the geometry of the tapers and modifying the shape of the balun, with these modifications a lower cutoff frequency (LCF) around 1.5 GHz is achieved. Results from reflection coefficients, radiation pattern and gain are presented. The overall design and electromagnetic simulation of the antenna are made with a a commercially avalaible simulator. Index Terms—Antipodal Vivaldi, Ground Penetrating Radar, FR4, taper, balun.conferenciahttps://ieeexplore.ieee.org/document/8526432
Palomino W.  Morales G.  Huaman S.  Telles J.PETEFA: Geographic Information System for Precision AgricultureProceedings of the 2018 IEEE 25th International Conference on Electronics, Electrical Engineering and Computing, INTERCON 201810.1109/INTERCON.2018.8526414Providing timely information through remote sensing tools to the farmers and to the National Institute of Agrarian Innovation (INIA) is important to manage the production of yellow corn crops (Zea Mays) in the region of Lambayeque, Peru. This paper addresses three objectives by providing information in different levels: First, provide information about the Normalized Difference Vegetation Index (NDVI) from crops in their different stages during their lifecycle; secondly, provide georeferenced soil analysis information organized by parcels and, finally, provide information about evapotranspiration of each parcel calculated using weather station sensors, soil type, land uses and georeferenced NDVI masks. All this information is provided through a Geographic Information System called Remote Sensing Platform for Agricultural Purposes (PETEFA), which is based on open source tools. In short, PETEFA is a monitoring tool that provides information through a computer or mobile device to the farmers or the INIA. Index Terms—PostGIS, yellow corn, UAV, satellite image.conferenciahttps://ieeexplore.ieee.org/document/8526414
Camarena K.A.  Flores L.Proposal of numerical model for airport pavement management purposesProceedings of the LACCEI international Multi-conference for Engineering, Education and TeCHIology10.18687/LACCEI2018.1.1.417This article presents the results of a quantitative investigation with descriptive and correlation scopes, where a database for pavements of a Peruvian airport was elaborated, with the purpose of developing a prediction numerical model of the pavement condition, which relates the pavement condition index (PCI) as a function of time (pavement age). Given the limitation of the pavement condition historical data and the need of them to know the pavement behavior under specific conditions (climate, traffic, material, among others) a quantitative numerical model is proposed applying Markov chains, calculating the Markov probability transition matrix from a data nonlinear logistic regression numerical process. Finally, the model validation is presented, which is the main tool of an Airport Pavement Management System (APMS), because it allows pavement status forecasting knowing its current status. Keywords --Pavement, PCI, APMS, deterioration model, pavement age.conferenciahttp://www.laccei.org/LACCEI2018-Lima/meta/FP417.html
Romero N.M.L.  Iquira J.A.F.  Trigoso A.T.  Medrano Y.N.Pruebas de Rendimiento Sobre el Clúster de CPUs y GPUs Empleando Simulación N-bodyProceedings of the LACCEI international Multi-conference for Engineering, Education and TeCHIology10.18687/LACCEI2018.1.1.494En las últimas décadas el campo de la computación ha sido una de las áreas que más ha evolucionado y a su vez permitió que se desarrollaran otros campos en los cuales se necesitaba procesar, simular, curar o resumir data tanto en el campo de la investigación, empresa y entretenimiento Con el paso del tiempo esta cantidad de procesamiento fue incrementándose constantemente debido a las necesidades actuales de los usuarios y la creciente cantidad de aplicaciones disponibles a éstos, por ejemplo, se suben aproximadamente 400 horas de videos a YouTube cada minuto [1], 300 millones de fotos a Facebook diariamente [2] y por cada evento producido en un experimento del CERN se genera 1 Mb de datos, ocurriéndose aproximadamente 600 millones de eventos por segundo [3] por lo que ha sido necesario incrementar el poder computacional y al hacerse cada vez más difícil tener todo esta capacidad de cómputo en una sola máquina se comenzó a trabajar implementado clústeres de computadores, computadoras en Grid, y crear tecnologías como Big Data para el almacenar y procesar los datos. En el presente trabajo se presenta la implementación de un clúster híbrido de computadores la cual incluye el uso de CPUs y GPUs, se detalla la construcción y configuración, las pruebas de rendimiento usadas para la comparación de uso y no uso de GPUs, así como un análisis de los resultados de las pruebas de rendimiento ejecutadas sobre el clúster. Keywords-- Cluster, Computación Paralela, GPU, n-BODY, MPI, y CUDA.conferenciahttp://www.laccei.org/LACCEI2018-Lima/meta/FP494.html
Morales G.  Arteaga D.  Huaman S.G.  Telles J.  Palomino W.Shadow Detection in High-Resolution Multispectral Satellite Imagery Using Generative Adversarial NetworksProceedings of the 2018 IEEE 25th International Conference on Electronics, Electrical Engineering and Computing, INTERCON 201810.1109/INTERCON.2018.8526416Detecting shadows in high-resolution satellite images is a challenging task due to the fact that shadows can easily be mistaken for low reflectance soil or water and that such images have limited spectral bands. In this work, we propose a semantic level shadow segmentation by using generative adversarial networks and created a dataset of pre-processed images for training, validation and test. In this way, we trained a generator network that produces shadow masks with condition on a satellite image patch and tries to fool a discriminator, which is trained to discern if a given mask comes from the ground truth or from the generator model. The results achieve an accuracy of 95.85% and a Kappa coefficient of 91.76%, which is superior to the compared methods. Index Terms—Shadow detection, Generative Adversarial Networks, end-to-end learning, satellite imageconferenciahttps://ieeexplore.ieee.org/document/8526416
Huamán A.  Quintana M.Surface modification of TiO2 nanostructured films by inserting Mg2+ ions applied to dye sensitized solar cellsJournal of Physics: Conference Series10.1088/1742-6596/1143/1/012019Nanostructured electrodes were prepared based on titanium dioxide (TiO2) modified by incorporating small amounts of magnesium oxide (MgO) to improve their efficiency in dye sensitized solar cells. J-V curve measurements show efficiencies increased from 2.32 to 2.55 % with the addition of MgCl2. On the other hand, the incident photon-to-current efficiency (IPCE) measures obtained show an improvement with the addition of magnesium oxide. This is in agreement with absorbance results and short circuit current values. Values from cyclic voltammetry curves show that surface modification caused energy levels to increase below the TiO2 conduction band by incorporating magnesium oxide. Electrochemical impedance spectroscopy confirmed the presence of these additional energy levels and gave evidence of increased recombination in the TiO2 film and decreasing electron lifetime from 15.95 to 6.82 msconferenciahttps://iopscience.iop.org/article/10.1088/1742-6596/1143/1/012019
Rubén Mallqui C.  Puga R.  Acosta D.  Hernandez J.M.  Loro H.Synthesis of NaYF4: Yb, Tm Nanoparticles by Solvothermal Method and Characterization by Upconversion Visible Radiation FluorescenceJournal of Physics: Conference Series10.1088/1742-6596/1143/1/012024We report the synthesis of NaYF4 nanoparticles doped with rare earth ions Yb3+, Tm3+, using the solvotermal method. These nanoparticles were synthesized varying the concentration of Tm3+, considering 0.5%; 1.0%; 1.5% and 2.0% of Tm3+ instead of the Y ions in NaYF4 in order to study variations in their emissions around 480 nm. The results show a better performance of 1% Tm3+ doped nanoparticles. We report emission spectroscopy results using a 980 nm diode laserconferenciahttps://iopscience.iop.org/article/10.1088/1742-6596/1143/1/012024
Alvarado P. Acosta D.  Gomez M.M.  Solis J.L.Synthesis of SnO2 quantum dots by chemical precipitation assisted by ultrasoundJournal of Physics: Conference Series10.1088/1742-6596/1143/1/012018SnO2 quantum dots were successfully prepared via chemical precipitation assisted by ultrasound. X-ray diffraction analysis confirmed the rutile tetragonal structure of SnO2 QDs with a crystallite size of 1.4 nm. The SEM micrographs of the obtained powder exhibited that the SnO2 QDs are agglomerated particles of around 10 nm, while TEM images confirmed that the crystallite size are similar to the measured from XRD. The band-gap energy of the SnO2 QDs measured from the UV–Vis reflectance spectrum of the SnO2 QDs was 4.3 eV, displaying a significantly blue-shifting attributed to quantum confinementconferenciahttps://iopscience.iop.org/article/10.1088/1742-6596/1143/1/012018