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MODELING AND SIMULATION OF MANUFACTURING PROCESS TO ANALYZE END OF MONTH SYNDROME
“Manufacturing industries across the globe face numerous challenges to become 100% efficient but each and every industry has its own constraints / problems with their functional system to achieve 100% excellence. End of the month syndrome is one of the major problems almost all manufacturing industries face with the ever growing demand and the competition around. Manufacturers find it really difficult to achieve their potential if they produce more than 25% of their monthly shipment plan in the last week of the month or more than 33% of their quarterly shipment plan in the last month of the quarter. Companies that live with the "end-of-the-month-crunch will be burdened with premium freight, internal expediting, overtime costs, and production inefficiencies that will crush their bottom line goals. But effective upfront planning and timely execution can make the “end-of-the-month-crunch" a bad memory and eliminate those profit killers. The causes for end of the month syndrome are raw material constraints and production inefficiencies, last minute product changes, stoppage and machine down time in manufacturing line etc. Manufacturing industries can analyze these challenges through the application of modeling and simulation technique with the existing system and try out various “what-if scenarios” (sensitivity analysis) without any physical changes to the existing process & thus find a solution to all those problems leading to End of the Month Syndrome.” (Kulkarni, 2012, p.1)
Este documento habla sobre como optimizar la producción de una empresa “Yamaha” mediante el modelamiento, el problema radica en el costo adicional que representa una producción mal planificada y el proceso para solucionar este problema.
MODELING OF COUPLED DEFORMATION, WATER FLOW AND GAS TRANSPORT IN SOIL SLOPES SUBJECTED TO RAIN INFILTRATION

“Rain infiltration into a soil slope leads to propagation of the wetting front, transport of air in pores and deformation of the soils, in which coupled processes among the solid, liquid and gas phases are typically involved. Most previous studies on the unsaturated flow and its influence on slope stability were based on the single-phase water flow model (i.e., the Richards Equation) or the water-air two-phase flow model. The effects of gas transport and soil deformation on the movement of groundwater and the evolution of slope stability were less examined with a coupled solid-water-air model. In this paper, a numerical model was established based on the principles of the continuum mechanics and the averaging approach of the mixture theory and implemented in an FEM code for analysis of the coupled deformation, water flow and gas transport in porous media. The proposed model and the computer code were validated by the Liakopoulos drainage test over a sand column, and the significant effect of the lateral air boundary condition on the draining process of water was discussed. On this basis, the coupled processes of groundwater flow, gas transport and soil deformation in a homogeneous soil slope under a long heavy rainfall were simulated with the proposed three-phase model, and the numerical results revealed the remarkable delaying effects of gas transport and soil deformation on the propagation of the wetting front and the evolution of the slope stability. The results may provide a helpful reference for hazard assessment and control of rainfall-induced landslides.” ( Hu, 2011, p. 1

ESTUDIO COMPARATIVO DE PROCEDIMIENTOS DE ESACALAMIENTO MULTIDIMENSIONAL A TRAVÉS DE EXPERIMENTOS DE SIMULACIÓN
“El escalamiento multidimensional es una colección de técnicas que construyen configuraciones de puntos a partir de la información inicial entre objetos, medida a través de coeficientes de desimilaridades. Para encontrar estos puntos existen , entre, dos estrategias fundamentales: el escalamiento métrico y el escalamiento no métrico. En el trabajo se hace un estudio de simulación para comparar una nueva técnica métrica. ACE, con la no métrica de Kruskal, usando dos métodos de minimización del stress, el de máximo descenso y el quasi Newton de Broyden. Con este propósito se generan cien configuraciones aleatorias de puntos R2 usando distribución U [0, 1]. Si las cuen configuraciones son modificadas por cierto error aleatorio, las nuevas distancias asociadas a cada configuración son llamadas distancias perturbadas. Utilizando estas configuraciones se realiza un estudio comparativo entre las cuatro combinaciones de técnica y método de minimización mencionada, teniendo en cuenta dos criterios de comparación, el stress y la función de pérdida.” (Miret, 2002, p. 1)
PREDICCIÓN DEL CRECIMIENTO URBANO MEDIANTE SISTEMAS DE INFORMACIÓN GEOGRÁFICA Y MODELOS BASADOS EN AUTÓMATAS CELULARAS
“En este trabajo se presentan dos modelos de predicción del crecimiento urbano elaborados para el Área Metropolitana de Granada, junto con la cartografía del crecimiento urbano de dicha zona en los últimos 30 años. Los modelos de predicción elaborados están basados uno en la regresión logística y otro en autómatas Celulares. Para la calibración y validación de estos modelos se han realizado varias simulaciones ex – post para el periodo 1984 – 1999, que has sido comparadas mediante distintos métodos con la cartografía elaborada correspondiente a dicha fecha, mostrando los resultados una mayor fiabilidad para el modelo basado en autómatas celulares. Finalmente se ha empleado este modelo para realizar un escenario futuro de crecimiento para la fecha 2014” (Benavente, 2006, p. 1)

SIMULACIÓN POR SOFTWARE DE LAS CURVAS GENERADAS EN VENTILACIÓN MECÁNICA POR CONTROL DE PRESIÓN
“Este documento presenta el concepto de la ventilación mecánica, característica del generador o ventilador mecánico y las diferentes variables de control ventilatorio en volumen, flujo, presión y tiempo. Para apreciar los cambios en estas variables, se hace una simulación con control ventilatorio por presión, tomando como base el modelo matemático unicompartimental pulmonar para obtener los gráficos correspondientes.”
La simulación es realizada mediante el uso de una Software desarrollada sobre la plataforma MATLA. (Flores, 2006, p. 2).
BIBLIOGRAFÍA
Flórez, N. (2006). Simulación por software de las curvas generadas en ventilación mecánica por control de presión. Recuperado el 13 de abril de 2013, de http://site.ebrary.com/lib/bibliotecaupssp/docDetail.action?docID=10293649&adv.x=1&p00=simulacion&f00=all
Aguilera Benavente, F. (2006). Predicción del crecimiento urbano mediante sistemas de información geográfica y modelos basados en autómatas celularas. Recuperado el 13 de abril de 2013, de http://site.ebrary.com/lib/bibliotecaupssp/docDetail.action?docID=10306437&adv.x=1&p00=simulacion&f00=all
Kulkarni, S. (2012). Modeling and Simulation of Manufacturing Process to Analyze End of Month Syndrome. Recuperado el 13 de abril de 2013, de http://link.springer.com/content/pdf/10.1007%2F978-3-642-28777-0_6
Hu, R. (2011). Modeling of coupled deformation, water flow and gas transport in soil slopes subjected to rain infiltration. Recuperado el 13 de abril de 2013, de http://link.springer.com/article/10.1007/s11431-011-4504-z
Miret, B. (2010). Estudio comparativo de procedimientos de esacalamiento multidimensional a través de experimentos de simulación. Recuperado el 13 de abril de 2013, de:
http://site.ebrary.com/lib/bibliotecaupssp/docDetail.action?docID=10280642&adv.x=1&p00=simulacion&f00=all

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