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Ítem Adaptive planning of 3G/4G systems using Q-analysis or polyhedral dynamics(IEEE International Symposium on Personal, Indoor and Mobile Radio Communications, PIMRC, 2004-01-01) Cardona, NarcisIn this paper we present a method for use Q-analysis in the initial planning process and later dynamic adaptation for 3G/4G cellular systems that intends to balance load in order to maximize capacity and reduce lost and dropped calls independently of the type of service. We support our proposal on dynamic simulations made with an own developed tool for dynamic simulations of CDMA systems, and show initial results that partially probe our proposed method.Ítem A virtual surgical telesimulation in micrographic dermatologic surgery (MOHS)(Elsevier, 2003-06-01) Vélez, J.AThe development and propagation of surgical procedures in dermatology establish a need for an approach to a new way of teaching and supporting techniques which use emergent technologies. Our work is based upon a generic concept of software architecture for telemedicine applications, which could provide educational telesimulation in the dermatologic surgery technique known as Mohs micrographic surgery. This technique is used in the neoplasia resection treatment. Actually, the modules proposed are evolving in the Internet platform and are planned to interact in a cyclic manner from a diagnostic precision aid, through a planning surgical tool, to a simulator facility.Ítem Technological Models of Municipal Wireless Networks based on Hybrid WiFi/WiMAX Mesh Networks: a proposal to Colombian Municipalities(Ieee, 2009-10-30) Rodríguez Hernández, Pedro SalvadorThe telecommunications infrastructure citizen-oriented has become a necessity in cities that wish to direct themselves to a new Information Society. One of the technological alternatives for these infrastructures is municipal wireless networks. These municipal wireless networks offer flexibility, speed of installation and less implementation costs for cities. For this reason, it is considered of interest the wider use of wireless networks for the Colombian municipalities, considers that in this environment there is limited budget and low rate of connectivity to broadband networks. This article presents a review of the current state of municipal wireless networks related to the technological aspects, with the intention to propose two technological architectures that may be feasible to implement in the Colombian municipalitiesÍtem Cost-time profiling: Putting monetary measures onto value stream maps(2006-05-20) Rivera Cadavid, LeonardoThe Cost-Time Profile (CTP) is a tool that presents graphically the accumulation, of direct costs on a product as it moves through the manufacturing process. CTP incorporates the time dimension, to the cost accumulation, and the area under the CTP curve is the Cost-Time Investment (CTI), which is a measure of the investment of resources on the manufacturing of the product. In this paper, a general overview of the CTP, its construction, applications and future research directions are presented.Ítem A statistical channel model for on body Area networks in Ultra Wide Band Communications(IEEE, 2009-09-10) Cardona, NarcisThis paper presents a novel statistical channel model for Ultra Wide Band Communications when On Body Area Networks Environments are considered. Results and Analysis of frequency measurements from 1GHz to 12GHz for body area networks are described. We propose a modified Saleh-Valenzuela statistical channel model considering different assumptions for small scale statistics in the model. Results show that the small scale amplitude follows a log normal distribution, the inter arrival times between multi path components are poisson process; the decay factor, the number of paths and clusters follow exponential distributions. The proposed model can be used for realistic simulations for on body communications in Ultra Wide Band systems. © 2009 IEEE.Ítem Objeto de diseño : apoyo a las personas con necesidades especiales causadas por discapacidad física de los miembros superiores(2004-01-01) James Albear, Doris ArnotEl porcentaje de personas con discapacidad en Colombia es de 12% y en Cali es el 16.1% de su población total, siendo la más frecuente después de la visual, la que presenta trastornos funcionales crónicos y la discapacidad para moverse o agarrar. La discapacidad, que se asocia con condiciones de bienestar deficientes, como la pobreza, la marginación social, y el analfabetismo, entre otros, es reflexionada desde la perspectiva del Diseño Industrial y los Factores Humanos para generar propuestas utilitarias que aporten en la concepción y construcción de objetos estandarizados que suplirán las necesidades de usuarios con diversos tipos y niveles de deficiencia física.Ítem Performance y Composición Audiovisual con Miró(2005-08-09) Franco, EnriqueMiró es un prototipo para composición y performance audiovisual en tiempo real, el cuál ha sido realizado en los lenguajes de programación Pd (Pure Data) y GEM (Graphics Environment for Multimedia). En Miró los gestos del intérprete se capturan mediante una tarjeta gráfica Wacom o del ratón del computador, lo que permite pintar y/o dibujar sobre la ventana de gráficas y generar sonidos mediante algoritmos de síntesis simultáneamente. La representación continua de gestos es grabada y asignada a algunos aspectos de las marcas hechas por el intérprete tales como velocidad, presión.Ítem Handset based automatic network re-selection system for GSM/GPRS and WiFi(ACM Press, 2008-10-30) Navarro Cadavid, AndrésThis paper presents the results of the development of a handset based automatic network reselection software system, which allows keeping end-to-end connections through semi-transparent handoff on WiFi/GSM-GPRS networks. A description of the developed system's software architecture is given, as well as of the components implemented for it, their functionalities and flow of control, all of which allow the permanent discovery of available networks for the mobile device, their evaluation, selection and switching to the network which offers the best ratings in its performance and operational profile, taking into account the preferences previously configured by the user. The system was developed in Java and C# for different operating systems (WinXP, WinMobile and Linux), and its interoperability has been tested in them. Some of the test scenarios are described and final comments about the tests results are given. Copyright 2008 ACM.Ítem La teatrocracia en las leyes electorales colombianas (1886-1935)(2008-09-30) Jaimes Peñaloza, Sonia MilenaEl objetivo de esta ponencia es estudiar, desde l as nociones de teatrocracia e instituciones, la manera como las leyes electorales colombianas exped idas entre 1888 y 1935 posibilitaron regular las prácticas políticas en Colombia, y la forma como se inventó una cultura política inspirada en los ideales de civilidad y progreso que la caracterizaron como moderna. La tesis que defenderemos, sostiene que la s leyes a modo de instituciones, en algunas ocasiones sirvieron para ordenar las funciones de las distin tas ramas del poder público, al tiempo que moldearon la vida democrática del país distanciándose de la lóg ica belicista decimonónica.Ítem QoS and multipath routing in vehicular network(ACM Press, 2007-05-14) Umaña, Sandra CéspedesLas redes Vehiculares Ad-Hoc o redes VANET, consisten en la asociación espontánea de un conjunto de vehículos equipados con tecnología de comunicación inalámbrica, que circulan y cambian dinámicamente su posición e intercambian datos entre sí. Estas redes fueron pensadas como segmentos autónomos y de direccionamiento plano, sin embargo, su estudio ha mostrado los beneficios de interconectarlas a segmentos de redes de infraestructura e Internet. El presente artículo revisa, mediante el uso de una herramienta de simulación, las mejoras globales de las métricas de calidad de servicio de la red, logradas mediante el uso de un protocolo de ruteo multi caminos. El modelo consta de un segmento de red fija (Internet), dos gateway reactivos y dos segmentos jerárquicos de redes VANET IPv6, las cuales están compuestas por nodos con alto grado de movilidad, tales como los vehículos en un entorno urbano.