Jaime Alberto Giraldo
National University of Colombia
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Publication
Featured researches published by Jaime Alberto Giraldo.
Información tecnológica | 2011
Omar Danilo Castrillón; William Sarache; Jaime Alberto Giraldo
The aim of the work presented in this paper was to reduce makespan time and idle time, and to increase machine utilization, in Job Shop-Open Shop environment, using a new methodology based on evolutionary algorithms. The study was done in an enterprise of the metal-mechanics sector. The proposed methodology is easy to implement and apply and the results are highly consistent, as shown by a variance analysis. The methodology allows reducing the total processing time by 33% and idle time by 51% with 99% approximation with respect to the optimum solution.
Información tecnológica | 2013
Jaime Antero Arango; Jaime Alberto Giraldo; Omar Danilo Castrillón
Resumen Este trabajo describe una propuesta de solucion al problema de procesar n trabajos en m maquinas paralelas no relacionadas. Es un problema de asignacion generalizado de orden lineal y tipo combinatorial que considera tiempos de montaje dependientes de la secuencia y entrada dinamica de trabajos. Se propone un algoritmo genetico con codificacion entera y conformacion de la poblacion, seleccion de padres, cruzamiento y mutacion aleatorios. Hay dos descendientes por generacion que compiten contra el peor elemento existente para entrar a la poblacion. Se itera un numero de generaciones proporcional al producto de n x m para obtener la solucion En cada maquina se secuencian los trabajos por fecha de entrega y los tiempos computacionales son aceptables. Se concluye que el problema pudo ser solucionado mediante el algoritmo genetico propuesto de forma eficaz y eficiente y que las soluciones se enfocan en reducir el tiempo de procesamiento y cumplimiento de fechas de entrega.
Formación universitaria | 2013
Jaime Alberto Giraldo; Carlos Andres Orozco Toro; Fabián A Jaramillo
This article presents an educational strategy based on a simulation model as a tool to support teaching learning sequencing jobs in a configuration job shop production. The idea came as part of a breeding research scheme in simulation of production systems and services, using the instructional design learning method based on problem solving (Problem-solving-Based Learning PBL). In the computational design, in the discrete event simulation and in the communication design, a simple and user-friendly interface was used. This is based on human-computer interaction using spreadsheets. It is concluded that simulation helps in the space-time compression required in virtual learning environments.
Información tecnológica | 2012
Pamela Escobar; Jaime Alberto Giraldo; Diana Maria Cardenas
This article presents a case study of a new production scheduling methodology applied on a manufacturing facility located on Manizales, Colombia, which combines Make to Stock (MTS) and Make to Order (MTO) environments. This implies to respond, using limited resources, to different, and sometimes opposite objectives, with negative impact on the service level. The proposed methodology uses group analytic hierarchy process ordering (GAHPO) to develop a dispatching rule combining three priority criteria, that when it is compared with other three simple rules, through a discrete event simulation model, presents better performance in most of the selected measures of interest. The study allows concluding that for companies which operate under hybrid environments it is possible to reach equilibrium between market satisfaction and the utilization of available resources.
Información tecnológica | 2014
Jhonathan M Vargas; Jaime Alberto Giraldo
A model to support decision making about health service is proposed. Discrete simulation has been used, evaluating different scenarios of health service delivered by an Institution of Health Services (IHS): general medical consultation, emergency, hospitalization and catastrophic diseases, among others. The model was developed so any IHS can simulate typical cost of service for one year using indicators from national health statistics adjusting values to the specific behavior of the HIS. The results obtained with the model have revealed that the costing approach is effective, and that the national average values of certain parameters must be modified for each case. Otherwise, important errors can be introduced in the budget when the variations of these parameters are not included.
Ingeniare. Revista chilena de ingeniería | 2010
Omar Danilo Castrillón; William Sarache; Jaime Alberto Giraldo
El objetivo del presente trabajo es disminuir el tiempo de proceso (Makespan) e incrementar el tiempo de trabajo de las maquinas, diminuyendo el tiempo de ocio en ambientes de Job Shop, a traves del diseno de una Hiper-heuristica basada en colonia de hormigas y algoritmos geneticos. Este trabajo se desarrolla en dos etapas: en la primera se realiza la definicion e identificacion de una Hiper-heuristica para la secuenciacion de procesos en ambientes Job shop. En la segunda etapa, es mostrada la efectividad del sistema en la programacion de la produccion. En el proyecto de investigacion, se selecciono una empresa del sector metalmecanico, donde por medio de una combinacion de colonia de hormigas y algoritmos geneticos, se programa la ruta optima para un pedido, logrando la optimizacion o suboptimizacion de su respectivo tiempo total de proceso en un porcentaje superior al 95%.
Formación universitaria | 2014
Carlos E Marulanda; Jaime Alberto Giraldo; Marcelo López
Se estudia el uso y apropiacion de las tecnologias de informacion y comunicaciones (TICs) por parte de jovenes de ultimo ano de bachillerato (preuniversitarios), en colegios publicos y privados de diversos municipios del Departamento de Caldas en Colombia. Se utilizaron metodos de observacion, analisis y sintesis y un tipo de estudio descriptivo, exploratorio y correlacional. Se destaca que el acceso y uso se esta generando desde la internet, el telefono movil, la facilidad de acceso y el interes por las tecnologias, pero no se estan aprovechando adecuadamente dichas tecnologias en asuntos de aprendizaje, Este estudio aporta informacion a la comunidad academica para definir una linea base que permita potenciar la apropiacion de las tecnologias en procesos de aprendizaje.
Información tecnológica | 2013
Carlos E Marulanda; Jaime Alberto Giraldo; Marcelo López
The aim of this work was to establish the state of knowledge management in the cluster of information and communications technologies in the coffee region of Colombia. Twenty two companies were evaluated in relation to practice, and skills of their employees to manage knowledge. Progress is evident in the development of skills for knowledge management and slow progress on the appropriation and use of practices. It is proposed that companies incorporate a guided knowledge management policy. This study contributes to the academic community and to the coffee cluster with a new form of evaluation and a baseline to enhance intellectual capital and organizational knowledge management.
Formación universitaria | 2017
Omar A Tapasco; Jaime Alberto Giraldo
espanolLa presente investigacion se propuso recoger informacion sobre el uso de las Tecnologias de la Informacion y la Comunicacion (TIC) en la actividad docente universitaria, la percepcion del profesorado sobre las TIC y la valoracion de la infraestructura tecnologica disponible, desde una perspectiva comparativa entre universidades publicas y privadas. Para tal proposito se realizo una encuesta entre 147 profesores de instituciones del Eje Cafetero, Colombia. Se recurrio al analisis factorial, el analisis de correspondencias multiples y pruebas de independencia. Se encontraron marcadas diferencias entre profesores de universidades publicas y privadas. Algunas diferencias con respecto al genero, pero no se hallaron diferencias significativas con respecto a otras variables descriptivas del docente como la edad, la escolaridad o los anos de experiencia docente. Pero aunque los indicadores favorecen a los docentes de instituciones privadas, tambien se evidencia un mayor nivel de estres asociado al uso de las tecnologias entre ellos. EnglishThe purpose of this research was to collect information about the use of Information and Communication Technologies (ICT) in university teaching, the perception of the teachers about the ICT and the assessment of the technological infrastructure available, from a comparative perspective between public and private universities. For this, a survey was carried out among 147 teachers from institutions of the Eje Cafetero, Colombia. Factor analysis, multiple correspondence analysis and independence tests were used. Marked differences were found between teachers of public and private universities, some differences with respect to gender, but no significant differences were found in relation to other descriptive variables of the teacher such as age, education level or years of teaching experience. But although the results are favorable to the teachers of private institutions, there is also evidence of a higher level of stress associated with the use of technologies among them.
Formación universitaria | 2016
Jaime Alberto Giraldo; Juanita Pinilla
This study addresses the issue of how to improve learning of service processes in industrial engineering programs through the technology known as Business Process Simulation (BPSIM). It is proposed to support such learning, based on the problem solving methodology employing a software tool that considers the cycle process modeling approach: selection, layout, validation, time analysis, resource analysis and analysis schedules. The tool developed is based on BPMN 2.0 (Business Process Modeling Notation) and in the use of an open-access software which includes a process simulator. The process implemented is the well-known service recruitment and integration of staff in a company. A pilot test done with a group of industrial engineering students allows concluding that the tool can be useful in the learning of process management service.