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1
artículo
Publicado 2021
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Authors are very thankful to CONCYTECFONDECYT, process E041-01 (Contract number 123-2018-FONDECYT-BM-IADT/AV), Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq) Process 305250/2019-1, Coordenação de Aperfeiçoamento de Pessoal de Nível Superior-Brasil (CAPES) Finance Code 001 and Programa Nacional de Pós-Doutorado (PNPD).
2
artículo
Publicado 2021
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Acknowledgments Mr. Jordán-Suárez thanks the financial support given by the Ministry of Education of Peru (MINEDU) through the project 179-2015-FONDECYT-DE for doctoral studies in Food Sciences at UNALM. The authors acknowledge the facilities provided by the Center of Spectroscopy and Electron Microscopy (CESMI) of the University of Concepcion and the support provided by Dr. Gladys Ocharan for the SEM-EDS images analysis in Lima.
3
artículo
Publicado 2018
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This work was supported by a Paul G. Allen Family Foundation Distinguished Investigator Award and the Moore Foundation Data-Driven Discovery Investigator program. The second author gratefully acknowledges CONCYTEC for a scholarship in support of graduate studies.
4
objeto de conferencia
Publicado 2019
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This work was supported by grant 234-2015-FONDECYT (Master Program) from Cienciactiva of the National Council for Science,Technology and Technological Innovation (CONCYTEC-PERU).
5
artículo
Publicado 2021
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Leaching of polymetallic sulfides is often challenging due to the complexity of these systems. The main issues are related to the formation of surface by-products or to the presence of different metals that require a greater consumption of chemicals compared to that needed to extract the target metal during leaching. This latter case is followed in the present work using X-ray photoelectron spectroscopy (XPS) during the leaching of a silver-containing polymetallic (Mn-Fe-Pb) sulfide under three different cyanidation procedures: (1) conventional leaching, (2) ultrasound-assisted leaching, and (3) leaching of a sample pretreated in alkaline media. In all cases, leaching results in the build-up of Pb compounds (oxides/hydroxides) on the surface of the minerals, suggesting a mechanism in which Pb is first leached by hydroxide and cyanide and later is re-adsorbed as an external layer on the m...
6
objeto de conferencia
Publicado 2017
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Aunque las señales electromiográficas superficiales son la señal de entrada más común para los algoritmos de aprendizaje automático en aplicaciones de reconocimiento de gestos de la mano y estimación de la fuerza del dedo, sólo hay unos pocos sistemas disponibles comercialmente para la adquisición de EMG superficial. Este trabajo propone una matriz de electrodos superficiales seca, barata y fácil de fabricar. Este sistema utiliza múltiples sensores diferenciales activos integrados en una pequeña placa de circuito impreso de doble capa, cada uno de los cuales utiliza dos pequeñas áreas rectangulares de la capa inferior como capa conductora para la adquisición de la señal. Con una ganancia diferencial de 60dB entre 23 y 3000Hz y una relación de rechazo de modo común de -60dB a 60Hz. Se presentan los criterios de diseño y las simulaciones.
7
objeto de conferencia
Publicado 2018
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The leaching of valuable metals from mineral ores is the basis of several extractive economies around the world, but the strategies employed often need to rely on dangerous compounds such as cyanides. Due to the complex nature of most ores, leaching processes are slow and have a low efficiency in noble metal extraction, which is usually improved by fine-milling the mineral. In this manuscript, we consider this strategy, demonstrating that it may increase the amount of silver leaching, but at the expense of a higher consumption of cyanide, which renders the process inefficient (only 2% of consumed cyanide is employed to complex silver). The increase in the yield of the desired product without the smarter use of dangerous compounds is shown as a paradigm of the need to insert green chemistry principles in industrial processes. We further present the result of two potential strategies for g...
8
tesis de grado
Publicado 2023
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En la actualidad, las redes sociales son percibidas como medios de comunicación, el cual permite el contacto de manera inmediata. Sin embargo, no siempre es utilizado adecuadamente, como es el caso de las relaciones de pareja, donde utilizan las redes sociales para controlar, amenazar a sus parejas, este fenómeno viene a ser conocido como Cyber Dating Abuse. De esta manera, el objetivo de la presente investigación fue analizar las representaciones sociales del Cyber Dating Abuse en un grupo de jóvenes pertenecientes a universidades privadas de Lima Metropolitana de entre 18 a 25 años de edad. Para ello, se utilizó la metodología cualitativa, basado en un diseño de análisis temático. La entrevista semi-estructurada permitió acceder a las diferentes informaciones, opiniones y actitudes dirigidas al fenómeno estudiado. Entre los principales resultados, se encontró que el compar...
9
artículo
Publicado 2018
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Juan S. Serrano-León thanks the “Secretaría Nacional de Educación Superior, Ciencia, Tecnología e Innovación” (SENESCYT), Ecuador, for the scholarship and financial support and Erick Saldaña thanks the Cienciactiva from the “Consejo Nacional de Ciencia, Tecnología e Innovación Tecnológica” (CONCYTEC), Peru (104-2016-FONDECYT), for the PhD scholarship.
10
artículo
Publicado 2018
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The authors are grateful to the São Paulo Research Foundation (FAPESP, Brazil) for funding the projects n° 2016/18052-5, 2015/15507-9, and 2014/16998-3; to the National Council for Scientific and Technological Development (CNPq, Brazil) for funding the project n° 401004/2014-7, the productivity grant of P.E.D. Augusto (306557/2017-7) and the M.Sc. scholarship of SS Campoli; and to Cienciactiva for the M.L. Rojas Ph.D. scholarship (CONCYTEC, Peru; Contract 087-2016-FONDECYT), from the ‘‘Consejo Nacional de Ciencia, Tecnología e Innovación Tecnológica“.
11
artículo
Publicado 1998
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The author is grateful to Prof. F. Miranda (UNSA) and Prof. R. Gilbert (UNL) for helpful discussions, and to the reviewers of this manuscript for valuable comments. Partial financial support of CONCYTEC is gratefully acknowledged. Preliminary experimental work was performed in the laboratories of the Chemical Engineering Department of the Universidad Nacional de San Agustin (Peru).
12
artículo
Publicado 2022
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Funding Statement: Authors are grateful to Concytec-Peru and The World Bank for the financial support of this project under the call “Mejoramiento y Ampliación de los Servicios del Sistema Nacional de Ciencia Tecnología e Innovación Tecnológica” 8682-PE, through Fondecyt Grant 017-2019 FONDECYT BM INC.INV.
13
artículo
Publicado 2021
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The authors thank CONCYTEC-FONDECYT, process E041-01 (Contract number 123-2018-FONDECYT-BM-IADT/AV), and Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq, Process 305250/2019-1).
14
tesis de maestría
Nowadays spectrometers are useful in many applications such as bio-medical technology among other industrial fields. State of the art low-cost spectrometers are usually equipped with linear photoelectric array detectors (line detectors). This thesis covers part of the software development for a low-cost multichannel spectrometer using a matrix detector instead of a linear array detector. The image acquisition including an automatic integration time optimizer was implemented. Furthermore, algorithms for data extraction and calibration were developed. Finally, the multi-channel-system with the new software was compared with a high-resolution spectrometer and the results were discussed.
15
tesis de maestría
The thesis has two purposes: The first one is to build a mathematical model that better approximates (with respect to the mathematical model in [2]) to the behaviour of the wine fermentation process with the addition of certain amount of nitrogen at some instant of time, based in [2]. This mathematical model is described by mean ordinary differential equations including some parameters which will be identified solving some optimization problems. The second purpose of the thesis is to study the improved model but introducing some control variables in order to stabilize in an appropriated sense the corresponding dynamical system of the new model. This is a kind of MIMO nonlinear system control problems and will be solved using the tools in [6].
16
artículo
Publicado 2020
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Magnetic fields (MF) are increasingly being applied in food processing to preserve food quality. They can be static (SMF), oscillating (OMF) or pulsed (PMF) depending on the type of equipment. The food characteristics can be influenced by several configurations of the applied magnetic field as its flux density, frequency, polarity and exposure time. Several mechanisms have been proposed to explain the eects of magnetic fields on foods. Some of them propose interactions at the subatomic particle level that show quantum behavior, such as the radical pair and cyclotron resonance mechanisms. Other proposals are at the level of DNA, compounds, subcellular organelles and cells. The interactions between food and magnetic fields are addressed in a general way in this work, highlighting the applications and action models involved and their eects on the physicochemical, enzymatic and microbiologic...
17
artículo
Publicado 2021
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This research was funded by the Consejo Nacional de Ciencia, Tecnología e Innovación Tecnológica-Concytec (Project: Equipamiento Científico 2018-01/E044-2018-01-BM, Contrato N◦ 012-2018-Fondecyt/BM) of the Peruvian Government, The World Bank Group, the Universidad Nacional Toribio Rodríguez de Mendoza de Amazonas and the Pontificia Universidad Católica del Perú. The APC was funded by the Consejo Nacional de Ciencia, Tecnología e Innovación Tecnológica-Concytec
18
artículo
Publicado 2022
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Mixed martial arts (MMA) has always been surrounded by controversy due to the unusual muscle development of its participants, so it is crucial to know the strategies that have been implemented to reduce doping cases. The main purpose of this paper is to describe the various cases of doping detected by USADA in UFC MMA participants. In addition, strategies that are being developed to reduce cases of positive doping are proposed. From the UFC USADA database, doping cases were extracted, obtaining the substance or substances involved; the formula, physiological effect and the athletes involved; the dates of the sampling; if it was out of competition or in-competition and the sanction time. The substances that were most involved were found to be Ostarine (22), Clomiphene (9), Diuretics (10) and Stanozolol (9). Some sanctions were diminished because they were treated with contamination of sup...
19
artículo
Publicado 2018
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Consejo Nacional de Ciencia, Tecnología e Inovación Tecnológica. Grant Number: Contract 272-2015-FONDECYT
20
artículo
Remote sensing is the technology that has enabled us to obtain information about the Earth's surface without directly contacting it. For this reason, currently, the Bolivian state has considered a list of interesting applications of remote sensing in the country, including the following: biodiversity and environment monitoring, mining and geology, epidemiology, agriculture, water resources and land use planning. The use of satellite images has become a great tool for epidemiology because with this technological advance we can determine the environment in which transmission occurs, the distribution of the disease and its evolution over time. In that context, one of the important diseases related to public health in Bolivia is Chagas disease, also known as South American Trypanosomiasis. Chagas is caused by a blood-sucking bug or Vinchuca, which causes serious intestinal and heart long ter...
