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Search Results: 1 - 10 of 13357 matches for " édgar Gutiérrez Franco "
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Metodología de optimización para la toma de decisiones en la red de suministro de biodiesel en Colombia
Gutiérrez Franco,édgar; Cadena Monroy,ángela Inés; Montoya,Jairo; Palacios,Fernando;
Cuadernos de Administración , 2011,
Abstract: this article proposes a methodology for decision-making based on deterministic and stochastic optimization models to design the network for the supply of palm oil and biodiesel in colombia. it takes account of the projections of technology available to the transportation sector in scenarios of probabilities associated with the demand for biodiesel in each period of the planning horizon. a base scenario is used to determine the opening of bio-refineries, production plans, optimum flows of raw material and finished products through the network, and the percentage of demand met. this methodology is a flexible took that allows lines of action to be defined depending on the conditions of the supply network, supporting strategic and tactical decision-making.
Metodología de optimización para la toma de decisiones en la red de suministro de biodiesel en Colombia Metodologia de otimiza o para tomada de decis es na rede de fornecimento de biodiesel na Col mbia Methodology of optimization for decisionmaking in the biodiesel supply network in Colombia
édgar Gutiérrez Franco,ángela Inés Cadena Monroy,Jairo Montoya,Fernando Palacios
Cuadernos de Administración , 2011,
Abstract: Este artículo propone una metodología de toma de decisiones, basada en modelos de optimización determinísticos y estocásticos, para dise ar la red de suministro de aceite de palma y biodiesel en Colombia. Tiene en cuenta las proyecciones de la tecnología disponible para el parque automotor en escenarios con probabilidades asociadas a la demanda de biodiesel en cada periodo del horizonte de planeación. A partir de un escenario base se determinan la apertura de bio-refinerías, los planes de producción, los flujos óptimos de materia prima y de producto terminado a través de la red, así como el porcentaje de cumplimiento de la demanda. Esta metodología es una herramienta flexible que permite definir las líneas de acción según las condiciones de la red de suministro, apoyando la toma de decisiones a nivel táctico y estratégico. Este artigo prop e uma metodologia de tomada de decis es, baseada em modelos de otimiza o determinísticos e estocásticos, para desenhar a rede de fornecimento de azeite de palma e biodiesel na Col mbia. Levando em considera o as proje es da tecnologia disponível para o parque automotor em cenários com probabilidades associadas à demanda de biodiesel em cada período do horizonte de planejamento. Partindo de um cenário base determina-se a abertura de bio refinarias, os planos de produ o, os fluxos ótimos de matéria prima e de produto terminado através da rede, assim como a porcentagem de cumprimento da demanda. Esta metodologia é uma ferramenta flexível que permite definir as linhas de a o segundo as condi es da rede de fornecimento, apoiando a tomada de decis es a nível táctico e estratégico. This article proposes a methodology for decision-making based on deterministic and stochastic optimization models to design the network for the supply of palm oil and biodiesel in Colombia. It takes account of the projections of technology available to the transportation sector in scenarios of probabilities associated with the demand for biodiesel in each period of the planning horizon. A base scenario is used to determine the opening of bio-refineries, production plans, optimum flows of raw material and finished products through the network, and the percentage of demand met. This methodology is a flexible took that allows lines of action to be defined depending on the conditions of the supply network, supporting strategic and tactical decision-making.
MODELAMIENTO DE LA CINéTICA DE HIDRóLISIS ENZIMáTICA DE PROTEíNAS DEL PLASMA BOVINO MODELA O DA CINéTICA DE HIDRóLISE ENZIMáTICA DE PROTEíNAS DO PLASMA BOVINO MODELING OF THE KINETICS OF ENZYMATIC HYDROLYSIS OF BOVINE PLASMA PROTEINSS
Omar Alfredo Figueroa,José édgar Zapata,Gail Albeiro Gutiérrez
Revista EIA , 2012,
Abstract: Se utilizó un modelo cinético para estudiar la velocidad de reacción en la hidrólisis de proteínas de plasma de bovino con alcalasa 2,4 L en un reactor batch. Se estudió la influencia de variables como la concentración inicial de sustrato y enzima sobre el grado de hidrólisis y se determinaron los parámetros cinéticos de la ecuación de velocidad, analizando su relación con las variables de trabajo. Se ajustó un modelo cinético de orden cero y desactivación enzimática por sustrato, de segundo orden, así como la relación directa entre la fracción enzima-sustrato y la tasa de formación de productos de hidrólisis. Utilizou-se um modelo cinético para estudar a velocidade de rea o na hidrólise de proteínas de plasma de bovino com alcalasa 2,4 L em um reator batch. Estudou-se a influência de variáveis como a concentra o inicial de substrato e enzima sobre o grau de hidrólise e determinaram-se os parametros cinéticos da equa o de velocidade, analisando sua rela o com as variáveis de trabalho. Ajustou-se um modelo cinético de ordem zero e desativa o enzimática por substrato, de segunda ordem, bem como a rela o direta entre a fra o enzimasubstrato e a taxa de forma o de produtos de hidrólise. A kinetic model was used to study the reaction rate of hydrolysis of bovine plasma proteins and alcalase 2.4 L, in a batch reactor. The influence of variables, such as the concentration of initial enzyme substrate and the degree of hydrolysis was studied, and kinetic parameters of the rate equation were determined by analyzing its relationship with the work variables. A zero-order kinetic model and enzyme deactivation by substrate was found, as well as the direct relationship between the fraction of enzyme-substrate and the rate of formation of hydrolysis products.
MODELOS PARA EL ANáLISIS Y DIAGNóSTICO DE EQUIPOS DE TRABAJO
FRANCO GUTIéRREZ,CARLOS ALBERTO;
Estudios Gerenciales , 2004,
Abstract: in this paper several models for the operation analysis and diagnosis of teams are presented. these models will be quite helpful to determine the effectiveness of the performance of the team and also for the design stages of a new one. three types of models are discribed. the hackman′s model, the traditional and the 3p, 3c models. the models will very useful to improve team performance, or to enhance its development, once the conditions impeding its operation are well understood.
MODELOS PARA EL ANáLISIS Y DIAGNóSTICO DE EQUIPOSDE TRABAJO
Carlos Alberto Franco Gutiérrez
Estudios Gerenciales , 2004,
Abstract: En este artículo presentaremos variosmodelos para el análisis de la opera-ción de los equipos de trabajo queayudan a conocer el estado de efecti-vidad con que está trabajando el equi-po, con el fin de contribuir a conse-guir las condiciones para una opera-ción que eleve su productividad. El primer modelo que presentaremoses el de Hackman. Posteriormentenos centraremos en el denominadotradicional y finalmente en el mode-lo de las 3P y 3 C.El primer modelo determina las con-diciones necesarias para satisfacerciertas condiciones de efectividad, elsegundo se centra en tres factoresgenerales que determinan la produc-tividad y el rendimiento y el tercermodelo considera los factores clavespara la operación de equipos exitosos.
Auto-reporte de victimización escolar y factores asociados en escolares peruanos de educación secundaria, a o 2007.
Franco Romaní,César Gutiérrez
Revista Peruana de Epidemiologia , 2010,
Abstract: Objetivo: Determinar la prevalencia de auto-reporte de ser víctima (victimización) de violencia escolar y determinar qué factores se encuentran asociados a dicho fenómeno. Métodos: Realizamos un análisis secundario de los datos del II Estudio Nacional de Prevención y Consumo de Drogas en Estudiantes de Secundaria de Perú en el a o 2007. Se midieron variables socio-demográficas: edad, sexo, región, nivel de pobreza, tipo de colegio, consumo de drogas legales, ilegales, médicas, estado de unión de los padres, a o de estudio y si trabaja además de estudiar. Además, determinamos la prevalencia de victimización, en base al auto-reporte de los escolares en 14 situaciones de violencia. Se hizo en análisis descriptivo, bivariado y multivariado para determinar los factores asociados. Resultados: La prevalencia de victimización fue de 56.4% y la frecuencia de victimización severa de 8.5%. Los escolares reportan en mayor frecuencia ser víctimas de alguna forma de violencia verbal en 66.2% de casos, de violencia física en 57.3%, de exclusión social en 47.1% y de formas mixtas de violencia en 17.6%. Conclusiones: La prevalencia de auto-reporte de victimización en escolares peruanos de educación secundaria es elevada, mayor a la reportada por otros países sudamericanos y en Europa. Existen muchas variables asociadas a cada uno de los tipos de victimización (edad, género, región de ubicación del colegio, tipo de colegio, a o de estudio, nivel de pobreza, estado civil de padres y consumo de drogas legales, ilegales y médicas). Este fenómeno, por su alta prevalencia, es un problema de salud pública que necesita un abordaje multidisciplinario para reducir su frecuencia e impacto.
Factores de riesgo asociados al suicidio en Nari?o (Colombia): estudio de casos y controles
Mu?oz Morales,édgar Jhonny; Gutiérrez Martínez,María Isabel;
Revista Colombiana de Psiquiatría , 2010,
Abstract: introduction: the who has estimated that approximately 1,53 millions of suicidal events and more than 10 to 20 times of suicide attempts will occurred by 2020 worldwide. sustained rates of suicide exceeding the national average of 55% of these deaths mainly occurred in young people between 15 and 24 years, in the department of narino. this differs from the international pattern where suicide is predominantly in older adults. objective: to determine individual, family related and social factors associated with the occurrence of suicide in the department of narino. methods: a matched case-control study. a sample of 101 individuals, who committed suicide (cases), and 112 deaths from unintentional injury (controls), were matched for age, municipality of residence and date of suicide. the information for both (cases and controls) was collected from the nearest relative. a structured questionnaire -includes the psychological autopsy technique and screening of major psychiatric syndromes (depression, anxiety, psychosis, and psychoactive substance was used). results: in the study sample, 70% of both cases and controls were male. when examine the conditional logistic regression model, lack of religious practice, under 11 years of formal education, previous mental disease diagnosis, previous suicide attempt, presence of acute stress, and depression, are remained independent significant predictors to the effect on risk of suicide. conclusions and recommendations: this analytical study is one of the kind developed in colombia. this study provided evidence to develop a municipal youth suicide prevention program in pasto, nari?o.
Evaluación de la resistencia de un prototipo de placa de compresión dinámica (PCD) fabricada de polimetilmetacrilato (PMMA) probada en fémur canino osteotomizado
Cardona R.,Leonel; Brousse,Mariana; Mieres,Marcelo; Arias,Sergio; Gutiérrez,édgar;
Revista de Medicina Veterinaria , 2011,
Abstract: femur fractures are the most frequent long bone fractures in small animals. due to the femur's anatomical position, it is difficult to immobilize, and therefore internal fixations are very useful. dynamic compression plates (dcp) provide high stability, are durable, minimize fragment movement and promote primary healing of the bone. advantages of this treatment include anatomical reconstruction, early mobility and carrying capacity of the affected limb. polymethylmethacrylate (pmma) is an acrylic resin that has proved very useful in bone tumor treatment, cranial deformation prosthesis, percutaneous vertebroplasty and testicular prosthesis in animals. the purpose of this study was to manufacture dcp-pmma and test its resistance to the different forces present in a fracture. forty-eight (48) 3.5mm x 4-hole dcp were made from an alginate mold. six (6) femurs were obtained from canine cadavers weighing from 10 to 20 kg, which underwent osteotomy simulating an oblique fracture. the plates were subsequently positioned in the osteotomized bones to submit them to the various forces involved in a fracture. the dcp-pmma resisted a torque force of 2.83 newton/metres and a compression and flexion force of 0.21 kilonewton. the obtained resistance of the dcp-pmma was an average of 20 kg per force. the results of this study show that it is possible to make a dcp-pmma 3.5 mm x 4-hole, the resistance of which is of 20 kg against the three applied forces, and that it can be used to stabilize long bone fractures subjected to a pressure of less than 20 kg.
Factores de riesgo asociados al suicidio en Nari o (Colombia): estudio de casos y controles Risk Factors for Suicide in Nari o, Colombia: A Matched Case-Control Study
édgar Jhonny Mu?oz Morales,María Isabel Gutiérrez Martínez
Revista Colombiana de Psiquiatría , 2010,
Abstract: Introducción: Según la OMS, en el 2020 aproximadamente 1,53 millones de personas se suicidarán y de 10 a 20 veces más lo intentarán. En el Departamento de Nari o (Colombia) se han venido presentado tasas sostenidas que superan el promedio nacional, y de estas muertes el 55% ha ocurrido en jóvenes entre los 15 y 24 a os de edad, un patrón de comportamiento que difiere del descrito en otras partes del mundo, donde predominan los suicidios de adultos mayores. Objetivo: Determinar los factores individuales, familiares y sociales asociados en la ocurrencia del suicidio en el Departamento de Nari o. Metodología: Estudio de casos y controles entre 101 individuos, quienes se suicidaron (casos), y 112 muertos por lesiones no intencionales (controles), apareando por edad, municipio de residencia y fecha del suicidio. La información se tomó del familiar más cercano, mediante un cuestionario estructurado -con técnica de autopsia psicológica y recolección de los síndromes psiquiátricos más importantes (depresión, ansiedad, psicosis y consumo de sustancias psicoactivas)-. Resultados: En la muestra, el 70% de casos y controles corresponden a los hombres. En el modelo de regresión logística condicionada permanecieron los siguientes predictores como efecto independiente en el riesgo de suicidio: falta de práctica religiosa activa, escolaridad menor de 11 a os, diagnóstico psiquiátrico previo, intento de suicidio previo, presencia de estrés agudo y depresión. Conclusiones y recomendaciones: Este estudio es uno de los pocos estudios analíticos realizados en Colombia. Además, con sus hallazgos es posible desarrollar un programa municipal de prevención de suicido en jóvenes de Pasto, Nari o. Introduction: The WHO has estimated that approximately 1,53 millions of suicidal events and more than 10 to 20 times of suicide attempts will occurred by 2020 worldwide. Sustained rates of suicide exceeding the national average of 55% of these deaths mainly occurred in young people between 15 and 24 years, in the Department of Narino. This differs from the international pattern where suicide is predominantly in older adults. Objective: To determine individual, family related and social factors associated with the occurrence of suicide in the Department of Narino. Methods: A matched case-control study. A sample of 101 individuals, who committed suicide (cases), and 112 deaths from unintentional injury (controls), were matched for age, municipality of residence and date of suicide. The information for both (cases and controls) was collected from the nearest relative. A structured question
Autorreporte de accidentes de tránsito en una encuesta nacional en la población urbana de Perú
Wong,Paolo; Gutiérrez,César; Romaní,franco;
Revista Peruana de Medicina Experimental y Salud Pública , 2010, DOI: 10.1590/S1726-46342010000200003
Abstract: objectives. to estimate the frequency of self-reporting of road traffic accidents in the previous year in the general population and to determine the associated factors. materials and methods. we conducted a secondary analysis of the data of the iii national survey of drug use in the general population of peru, 2006. we measured socio-demographical variables: age, gender, place of origin, educational level and marital status. we also evaluated the use of legal, illegal and medical drugs. the independent variable was the self-reporting of a road traffic accident. we performed the descriptive, bivariate and multivariate analysis of the socio-demographical variables and the drug use (legal and illegal), together with the self-reporting of the traffic accident. results. the frequency of reporting of road traffic accidents in the last year according to the survey was 2.93% (95%ci: 2.92-2.94). the associated factors for self-reporting of a road traffic accident were: to live in the jungle areas (or: 2.03; 95%ci:1.55-2.65), male gender (or: 1.79; 95%ci: 1.46-2.22), legal drugs use in the last year (or: 1.98, 95%ci: 1.53-2.55), alcohol consumption in the last year (or: 1.82; 95%ci: 1.44-2.32) and medical drugs use in the last year (or: 2,45, 95%ci 1,63-3,68). conclusions. the prevalence of self-reporting of road traffic accidents in the last year was very high compared to similar studies and other reporting sources. the variables associated with having had a traffic accident were: living in the jungle area, being male, legal drug use in the last month, especially alcohol and medical drug use in the last month. it is necessary to think carefully about the information system of the road traffic accidents in order to achieve a better picture of the problem putting emphasis in the legal drugs use.
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