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1
artículo
In this work, we present the development of a numerical scheme based in finite differences for numerical approximation to the solution of a unidimensional coupled linear thermoelastic system. Development the necessaries conditions for stability, consistence and convergence of the numerical scheme. Based in Von Neumann's method, we get the conditions for conditional stability of this algorithm and based in an example we contrast computationally the approximate the approximate solution got, by the finite differences scheme with the analytic solution.
2
artículo
Publicado 2012
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Oslo is a software allow to design optical systems in an interactive graphical environment using an optical elements set such as mirrors, lens, prisms, diafragms, pupils, showing the parameters details of each element which are added succesively to finally obtain the optical system with expected parameters we want to build. In this paper, we compare the theoretical models and OSLO results for the design of an achromatic len, an parallel plates prism and achromatic len with the Scheimpflug condition for validating purposes of the OSLO as a computer didactic tool for teaching geometric and paraxial optics.
3
tesis de grado
Publicado 2022
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Los objetos del patrimonio cultural peruano representan historia e identidad única para nuestra nación. Estos objetos son sensibles a las condiciones ambientales inadecuadas, por lo que su cuidado y conservación son tareas importantes. Generalmente se encuentran distribuidos en espacios que no posibilitan ni facilitan el uso de dispositivos comerciales de medición ambiental, por lo que no se tiene disponibilidad oportuna de las condiciones ambientales a las que se encuentran. Es por eso que este trabajo presenta el diseño e implementación de una red de sensores que permiten su utilización en los diferentes espacios donde se encuentren los objetos del patrimonio cultural peruano. La propuesta considera requerimientos de larga autonomía, volumen reducido, amplio set de sensores y conectividad a internet sin depender de la infraestructura física y tecnológica del lugar. Este siste...
4
artículo
For the best performance and longer duration of devices or elements that participate in a mechanical energy transport system, they require an adequate lubrication process in the areas exposed to friction: bearings, gears, cylinder-piston, etc. This process is very important for the optimal functioning of the system, since it reduces repair costs and unscheduled failures. One of the frequent problems of poor lubrication is generated by the Cavitation phenomenon, for this reason it is important to study its effects under operating conditions. In the present work, the formulation and numerical simulation of Cavitation in bearings is carried out, considering the variation of the viscosity of the lubricant in relation to the pressure and the distribution space. In other works carried out on this phenomenon, it is mentioned how complex it would be to develop a numerical process in a two-dimens...
5
artículo
Obesity is a public health problem that affects the world population, that is why the present work is oriented to present a computer solution for the estimation and prediction of obesity levels, making it possible for a person to know their current physical condition for this we used a dataset of people with obesity from different countries like Peru, Mexico and Colombia based on their eating habits and their physical condition, creating a decision tree with all these data.
6
artículo
Publicado 2009
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Peru is in fact a country with important reservoirs of natural gas as Camisea and it opens potential opportunities for gas chemical development. In a mark of a higher enterprise competitiveness, in industry any time is more generalized to account with tools as support for enhanced of process and cost savings. The simulation and optimization of industrial process aided by computer is a powerful alternative. This work has as propose to make the design of a process an economical analysis with preliminary character of an integrated fertilizer complex for several plants: ammonia, nitric acid, ammonia nitrate and urea. The complex to treat the simulation in process where the transformation reactions happen in all steps of the plant, as is the case of nitric acid; it requires a great domain, not alone in the use of a powerful simulator, but a deeper knowledge of reaction kinetics and the thermo...
7
artículo
Publicado 2009
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Peru is in fact a country with important reservoirs of natural gas as Camisea and it opens potential opportunities for gas chemical development. In a mark of a higher enterprise competitiveness, in industry any time is more generalized to account with tools as support for enhanced of process and cost savings. The simulation and optimization of industrial process aided by computer is a powerful alternative. This work has as propose to make the design of a process an economical analysis with preliminary character of an integrated fertilizer complex for several plants: ammonia, nitric acid, ammonia nitrate and urea. The complex to treat the simulation in process where the transformation reactions happen in all steps of the plant, as is the case of nitric acid; it requires a great domain, not alone in the use of a powerful simulator, but a deeper knowledge of reaction kinetics and the thermo...
8
artículo
Publicado 2018
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A novel Fibre Electronic Characterizer (called Fiber EF) was developed and validated. In the development of the Fiber EF, mechanical, optical, electronic and computer components were used and assembled. For the calibration, validation and evaluation of the potential use in animal fibres samples of well-known diameter patterns were taken from tops of sheep, mohair, alpacas, as well as samples of fibre snippets of vicuñas and alpacas, which were measured before and after calibration with the Fiber EF, OFDA2000 in 100 mode and Laserscan. Snippets (n=299) of unwashed alpaca samples were also measured in the OFDA 2000 and in the Fiber EF under field conditions. The developed Fiber EF allows to process the images of fibres obtained by artificial vision technology, making more than 8000 measurements per sample in 30 seconds. The results are shown in a friendly graphical interface that is part ...
9
tesis de grado
Publicado 2020
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En este trabajo de investigación se desarrolló un Sistema de Inscripción en Cloud Computing para el Registro de Postulantes a un Examen de Admisión de una entidad educativa superior, ya que en la actualidad existen entidad educativa superior que no cuenta con un Sistema de Información automatizado para el Proceso de Inscripción a los Exámenes de Admisión. Se pretende solucionar los siguientes problemas: • No cuentan con un sistema web de inscripciones. • La inscripción de los postulantes se realiza de manera manual. • No se lleva un registro de los documentos entregados por el postulante. En esta investigación se plantean los siguientes objetivos: a) Usar SCRUM como framework de gestión de proyecto. b) Evaluar la usabilidad del sistema de información desarrollado de acuerdo con los 10 principios de Nielsen. c) Generar información de apoyo para el cumplimiento de las Co...
10
artículo
Publicado 2018
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The water infiltration analysis in soils is indispensable in order to understand how the moisture variations in the soil occurs in real situations as well as its influence in the engineering properties. However, such analysis requires the unsaturated soil parameters for the computations. These parameters, such as the unsaturated hydraulic conductivity can be estimated by using the soil water retention curve (SWRC). The SWRC governs the hydration and dehydration process in soils. The current research, studies the water infiltrations in a residual soil from Brazil under two unsaturated initial conditions. The analysis was performed by using a finite elements software employing the SWRC of the soil obtained experimentally. The results show that the saturation time is in function of the initial saturation of the soil and the quality of experimental data in the SWRC.
11
artículo
Publicado 2018
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The water infiltration analysis in soils is indispensable in order to understand how the moisture variations in the soil occurs in real situations as well as its influence in the engineering properties. However, such analysis requires the unsaturated soil parameters for the computations. These parameters, such as the unsaturated hydraulic conductivity can be estimated by using the soil water retention curve (SWRC). The SWRC governs the hydration and dehydration process in soils. The current research, studies the water infiltrations in a residual soil from Brazil under two unsaturated initial conditions. The analysis was performed by using a finite elements software employing the SWRC of the soil obtained experimentally. The results show that the saturation time is in function of the initial saturation of the soil and the quality of experimental data in the SWRC.
12
artículo
Publicado 2018
Enlace
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The water infiltration analysis in soils is indispensable in order to understand how the moisture variations in the soil occurs in real situations as well as its influence in the engineering properties. However, such analysis requires the unsaturated soil parameters for the computations. These parameters, such as the unsaturated hydraulic conductivity can be estimated by using the soil water retention curve (SWRC). The SWRC governs the hydration and dehydration process in soils. The current research, studies the water infiltrations in a residual soil from Brazil under two unsaturated initial conditions. The analysis was performed by using a finite elements software employing the SWRC of the soil obtained experimentally. The results show that the saturation time is in function of the initial saturation of the soil and the quality of experimental data in the SWRC.
13
artículo
Publicado 2018
Enlace
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The water infiltration analysis in soils is indispensable in order to understand how the moisture variations in the soil occurs in real situations as well as its influence in the engineering properties. However, such analysis requires the unsaturated soil parameters for the computations. These parameters, such as the unsaturated hydraulic conductivity can be estimated by using the soil water retention curve (SWRC). The SWRC governs the hydration and dehydration process in soils. The current research, studies the water infiltrations in a residual soil from Brazil under two unsaturated initial conditions. The analysis was performed by using a finite elements software employing the SWRC of the soil obtained experimentally. The results show that the saturation time is in function of the initial saturation of the soil and the quality of experimental data in the SWRC.
14
tesis de grado
Publicado 2023
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La aparición temprana de rajaduras en la cámara de combustión de los motores AI-20D-5 en las aeronaves Antonov AN32-B es un problema que no ha sido investigado por completo. Estudios previos proponen que la causa de estas fallas es la fatiga térmica del material, sin embargo, no existe a la fecha un análisis que tome en cuenta mecanismos de falla combinados. Para este proyecto, se investigó la aparición de estas fallas prematuras a partir de la información de operación del motor y un análisis computacional de la interacción (térmica y de esfuerzos) entre los gases de combustión y la estructura de la cámara. Se aplicó un análisis computacional de fluidos para obtener las cargas térmicas y un análisis de elementos finitos para calcular la distribución de esfuerzos y deformaciones en el material de la cámara de combustión en la condición de operación de despegue. Por ...
15
artículo
Publicado 2014
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Usually the machinery used in engineering applications, especially those implicating cyclic processes make use of oscillating systems that include components vibrating each one with a particular frequency, in a medium with continuously changing muffling, temperature, etc. As a consequence these vibrations may eventually break the harmony of the common oscillation and experiment chaos. Hence some Chaos notions are critical in this type of applications. This work reports the results of a chaos research in a very frequently applied oscillating system. It is found that chaos is an eventual occurrence. After the system undergoes chaos, it returns to its oscillating stage under the conditions imposed by the medium (muffling, temperature, frequency, etc.) at the moment of leaving chaos. This leads to considering the eventual design of chaos surviving machinery
16
artículo
Publicado 2014
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Usually the machinery used in engineering applications, especially those implicating cyclic processes make use of oscillating systems that include components vibrating each one with a particular frequency, in a medium with continuously changing muffling, temperature, etc. As a consequence these vibrations may eventually break the harmony of the common oscillation and experiment chaos. Hence some Chaos notions are critical in this type of applications. This work reports the results of a chaos research in a very frequently applied oscillating system. It is found that chaos is an eventual occurrence. After the system undergoes chaos, it returns to its oscillating stage under the conditions imposed by the medium (muffling, temperature, frequency, etc.) at the moment of leaving chaos. This leads to considering the eventual design of chaos surviving machinery
17
documento de trabajo
Publicado 2016
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El Índice de Condiciones Monetarias (ICM), un promedio ponderado de las variaciones de la tasa de interés y el tipo de cambio real, puede utilizarse para evaluar la posición de la política monetaria en el contexto de una economía pequeña y abierta. Sin embargo, en el caso de Perú, la dolarización parcial de la economía obliga a hacer algunos ajustes al ICM tradicional, que supone que tanto un alza en la tasa de interés como una apreciación del tipo de cambio real son necesariamente recesivos. Primero, una devaluación del tipo de cambio real puede ser recesivo, porque el efecto hoja de balance puede primar sobre el efecto competitividad. En segundo lugar, los movimientos en la tasa de interés en moneda extranjera, impulsadas por los cambios en la tasa de encaje por depósitos en esta moneda, pueden determinar también la posición de la política monetaria. En esta investigac...
18
artículo
The aim of this work is to analyze the performance of a drinking water supply system. The data was collected by the city’s water system staff. The water supply system performance was measured using Six Sigma metrics on an EPANET simulation. Initial conditions were compared to future scenarios under implemented changes. The results showed that the current water supply is incapable of satisfying user requirements. The water shortage is not due to a lack of extraction but to losses of up to 43% that occur within the system itself. However, according to the simulation, the system’s capacity can be improved by applying changes to the pumping and distribution conditions. Inspection and maintenance of the network is a priority in order to mitigate large water losses. Increasing extraction would mask the waste problem and lead to an overexploitation of the well.
19
artículo
The aim of this work is to analyze the performance of a drinking water supply system. The data was collected by the city’s water system staff. The water supply system performance was measured using Six Sigma metrics on an EPANET simulation. Initial conditions were compared to future scenarios under implemented changes. The results showed that the current water supply is incapable of satisfying user requirements. The water shortage is not due to a lack of extraction but to losses of up to 43% that occur within the system itself. However, according to the simulation, the system’s capacity can be improved by applying changes to the pumping and distribution conditions. Inspection and maintenance of the network is a priority in order to mitigate large water losses. Increasing extraction would mask the waste problem and lead to an overexploitation of the well.
20
artículo
Publicado 2024
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Objetivo: Avaliar a eficácia dos modelos de aprendizagem profunda e das suas extensões com modelos de volatilidade condicional na previsão da volatilidade do Índice Geral S&P/BVL Peru. Métodos: O estudo adotou um desenho analítico não experimental, transversal, para prever a volatilidade do Índice Geral S&P/BVL Peru, analisando 5807 dados de 3 de janeiro de 2000 a 16 de outubro de 2023. Os dados históricos do Índice foram processados utilizando técnicas computacionais em Python. Foram efectuados testes estatísticos tais como o teste Dickey-Fuller aumentado e o teste Jarque-Bera. Para alcançar a estacionariedade dos dados, foi necessário aplicar diferenciação após testes de raiz unitária. A precisão dos modelos foi comparada através dos testes Diebold-Mariano e Wilcoxon Signed Rank. Resultados: Os modelos GJR-GARCH, SVR com kernel linear e redes neurais demonst...
