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1
artículo
Publicado 2020
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It is important for small growing textile companies to make key decisions based on accurate and reliable information about the present production process and how future changes could affect them. Using traditional mathematical methods it is not possible to accurately and reliably reflect the real stochastic behaviour of processes and activities carried out in this industry. There are, however, information technologies such as the computer simulation technique that allow such information to be obtained taking this behaviour into account.he research carried out a simulation study of the garment making process of a small textile company in order to propose a better distribution of resources by experimenting with a simulation model of the process, In addition, some of the quantitative information obtained with this technique is presented. The results obtained show that making changes in assi...
2
artículo
Publicado 2023
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In this article, a simulation model was developed to propose and evaluate improvements that increase the productivity of the production process of a manufacturing company and at the same time help achieve the company's objectives, for which the Promodel simulation software was used. The study begins with the conceptualization of the model explaining the operation of the production process of the company, detailing the transactions used in the operations and then presenting the layout of the model with the different locations, entities and resources provided by the production process. And finally the results of the model are transcribed with the new values of the variables that intervene in the process and with these values compare it with the current ones and obtain the conclusions of productivity improvement.
3
artículo
Publicado 2014
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In the present investigation a simulation model was elaborated to propose and to evaluate improvements in a center of distribution of foods of human consumption. They took as indicators to evaluate the acting of the system; the level of service that perform the center, the time of answer, so much in the reception as the despatch and the operative costs. With the simulation model they were executed a series of experiments; as the plant layout of the warehouse, modifications in the reception processes and shipping, obtaining this way a configuration that the yield of the system increases in study in approximately 40%.
4
artículo
Publicado 2014
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In the present investigation a simulation model was elaborated to propose and to evaluate improvements in a center of distribution of foods of human consumption. They took as indicators to evaluate the acting of the system; the level of service that perform the center, the time of answer, so much in the reception as the despatch and the operative costs. With the simulation model they were executed a series of experiments; as the plant layout of the warehouse, modifications in the reception processes and shipping, obtaining this way a configuration that the yield of the system increases in study in approximately 40%.
5
artículo
Publicado 2019
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Debris flows are geophysical phenomena, caused by torrential rain, which occur in mountainous areas, characterized by the detachment of slope and riverbed materials and their consequent dislodge through watersheds and streams. Debris flows usually carry sludge, water and rocks, and can destroy everything in their path. On February 8th, 2019, an event of this type occurred and destroyed Mirave’s community in Peru, which was located in the areas of transport and deposition of debris flows. This research presents the modeling and numerical simulation to reproduce the transport and deposition processes of the debris flow that occurred in Mirave. The initiation process of the debris flow in streams was represented by hydrographs obtained from the estimated rain runoff volumes and solid materials found at each evaluated micro watershed. The numerical simulation results show acceptable result...
6
artículo
Publicado 2021
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Present study comes under the project MAGNET-IGP: Strengthening the research line in physics and microphysics of the atmosphere (Agreement No 010-2017-FONDECYT) This work was done using instruments of the Laboratory of Physics, Microphysics and Radiation (LAMAR) and computational resources, HPC-Linux -Cluster, from Laboratorio de Dinamica de Fluidos Geofisicos Computacionales at Instituto Geofisico del Peru (grants 101-2014-FONDECYT, SPIRALES2012 IRD-IGP, Manglares IGP-IDRC, PP068 program).We also thank Mr. Luis Suarez Salas for the support of LAMAR instruments.
7
artículo
Publicado 2018
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Filiación institucional de autor: Alejo Cochachín Rapre / Autoridad Nacional del Agua - Unidad de Glaciología y Recursos Hídricos (ANA-UGRH), Huaraz, Peru
8
tesis de grado
Publicado 2025
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El aumento en la complejidad de los sistemas automatizados requiere que las metodologías de programación de PLC no se queden en el enfoque tradicional, el cual es un método heurístico de prueba y error. A pesar de que este procedimiento es el más empleado en la industria, este presenta dificultades en cuanto a la representación de ocurrencias, sincronización y la posibilidad de validar el programa antes de implementarlo en los controladores industriales (PLC). Este proyecto propone el uso de Redes de Petri como una herramienta para programar un PLC que controla un modelo digital de un sistema automatizado que clasifica, ensambla y transporta piezas. La metodología del proyecto consiste en: (i) una revisión de la literatura sobre Redes de Petri aplicada en el control de procesos, (ii) la construcción del modelo digital en Factory I/O, (iii) el modelado y especificación de la pl...
9
artículo
Publicado 2020
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While there is evidence that ENSO activity will increase in association with the increased vertical stratification due to global warming, the underlying mechanisms remain unclear. Here we investigate this issue using the simulations of the NCAR Community Earth System Model Large Ensemble (CESM-LE) Project focusing on strong El Niño events of the Eastern Pacific (EP) that can be associated to flooding in Northern and Central Peru. It is shown that, in the warmer climate, the duration of strong EP El Niño events peaking in boreal winter is extended by two months, which results in significantly more events peaking in February–March–April (FMA), the season when the climatological Inter-Tropical Convergence Zone is at its southernmost location. This larger persistence of strong EP events is interpreted as resulting from both a stronger recharge process and a more effective thermocline f...
10
tesis de grado
Publicado 2025
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Las operaciones de almacenamiento multitemperatura en el sector logístico alimentario enfrentan presiones crecientes para sostener altos niveles de servicio con inventarios exactos y costos controlados. En este contexto, la investigación tiene como objetivo diseñar y validar una propuesta de ingeniería que incremente el nivel de servicio del proceso “Almacenamiento multitemperatura e Inventariado” de un centro de distribución en el Perú y reduzca los ingresos no percibidos por cortes de stock. El estudio aplica el modelo SCOR para estructurar el diagnóstico, integra herramientas de Lean Logistics y estudio de trabajo para el rediseño de subprocesos, y utiliza modelos de series de tiempo, regresiones lineales, simulación Montecarlo y simulación discreta de eventos para cuantificar el impacto de la propuesta. Los resultados muestran que el problema no responde a falta de capa...
11
artículo
Publicado 2020
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El texto completo de este trabajo no está disponible en el Repositorio Académico UPC por restricciones de la casa editorial donde ha sido publicado.
12
artículo
Publicado 2020
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Filiación institucional de autor: Alejo Cochachín Rapre /Autoridad Nacional del Agua - Unidad de Glaciología y Recursos Hídricos (ANA-UGRH), Huaraz, Peru
13
artículo
The ability of the WRF-ARW (Weather Research and Forecasting-Advanced Research WRF) model to forecast extreme rainfall in the Central Andes of Peru is evaluated in this study, using observations from stations located in the Mantaro basin and GOES (Geostationary Operational Environmental Satellite) images. The evaluation analyzes the synoptic conditions averaged over 40 extreme event cases, and considers model simulations organized in 4 nested domains. We first establish that atypical events in the region are those with more than 27 mm of rainfall per day when averaging over all the stations. More than 50% of the selected cases occurred during January, February, and April, with the most extreme occurring during February. The average synoptic conditions show negative geopotential anomalies and positive humidity anomalies in 700 and 500 hPa. At 200 hPa, the subtropical upper ridge or “Bol...
14
objeto de conferencia
Publicado 2018
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El presente trabajo fue desarrollado gracias a la Universidad Nacional de Ingeniería y a los fondos FONDECYT del programa Ciencia Activa (CONCYTEC).
15
artículo
Publicado 2014
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Filiación institucional de autor: Alejo Cochachín Rapre /Autoridad Nacional del Agua - Unidad de Glaciología y Recursos Hídricos (ANA-UGRH), Huaraz, Peru
16
artículo
Publicado 2021
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One of the first phases of cancer is known as angiogenesis by the which are created new blood vessels from the pre-existing one. In this paper, the well-known equation of Fokker-Planck is used to describe the time evolution of the new vessels since their creation until the time that them acquire certain stability. In particular, emphasis is done to the term of drift that encompasses the stochastic character of angiogenesis. Once the theory is proposed, computational simulations are carried out. For this, the Gaussian approach with a time-dependent width is employed. This yields a oscillating scenario of ions due to the repulsion and attraction forces at the events of permeability.
17
tesis de maestría
Publicado 2023
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The proportional hazard model plays a fundamental role in the analysis of time-to-event data. In this thesis, we conduct a simulation study to evaluate the performance of M-splines to estimate the baseline cumulative hazard function for the proportional hazard model. We assess the effect of sample size and number of knots in the estimation process. Finally, we apply this method to a sample of students from a university where the event of interest is the payment on time of the last tuition fee.
18
tesis de maestría
Publicado 2020
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Los modelos de supervivencia, aquellos que tratan de describir el tiempo a la ocurrencia de uno o más eventos, han demostrado tener gran versatilidad para poder modelar distintos tipos de eventos y un alcance mayor al que inicialmente se propuso. Su aplicación varía desde el área de la medicina hasta usos en actividades financieras como análisis de riesgos de activos, entre otros. Este trabajo tiene como motivación el análisis del tiempo de permanencia de un cliente con contrato de póliza de seguros. En esta aplicación, solo una fracción de los clientes son susceptibles a la terminación del contrato y, en este sentido, se requiere que el modelo cuente con la flexibilidad de asumir que no todos los clientes son susceptibles al evento de interés. En este trabajo, se propone un modelo de larga duración asumiendo un modelo de riesgos proporcionales para los clientes susceptibles...
19
artículo
Publicado 2024
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The open-pit mining industry is vital to the global economy, facing challenges in operational efficiency and cost management. Fleet sizing is crucial for optimization, requiring innovative approaches. Discrete event simulation using Arena software addresses fleet sizing complexities in open-pit mines, aiding in understanding operational delays and high costs. This research aims to develop a framework integrating process modeling and simulation in Arena, enabling real-time fleet decisions. The study reviews mining process simulation literature, open-pit mine characteristics, and proposes detailed models for geology, topography, and mining operations. Critical variables like equipment performance, productivity, and truck hours will be evaluated. Results aim to provide mining companies a valuable decision-making tool for efficient resource management and cost reduction. The study also explo...
20
artículo
Publicado 2018
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This research is part of A. Chamorro’s PhD thesis, funded by the fellowship from CIENCIACTIVA/CONCYTEC-PERU at the University Pierre and Marie CURIE of Paris, France. It is also part of the IDB project PE-G1001/PE-T1297 (Adaptation to Climate Change of the Fishery Sector and Marine-Coastal Ecosystem of Peru), and it is a contribution to the cooperative agreement between the Instituto del Mar del Perú (IMARPE) and the Institut de Recherche pour le Developpement (IRD), the LMI DISCOH and JEAI EMACEP. The simulations were performed on the supercomputer Curie from the GENCI at the CEA (projects x2014011140, x2015011140 and x2016011140). Francois Pinsard and Sebastien Masson are acknowledged for their help in the making of lateral boundary forcing for the regional atmospheric model. Francis Codron, Clémentine Junquas, and lab colleagues from LMOECC at IMARPE are acknowledged for useful di...
