13 resultados
Resultados de la búsqueda
Mostrando 1 - 10 de 13
Ítem Arquitectura de software basada en la Internet para la simulación virtual de cirugía endoscópica otorrinolaringológica(Universidad Icesi, 2006-07-28) Navarro Newball, Andrés Adolfo; Múnera Salazar, Luis Eduardo; Vélez Beltrán, Jorge Alberto; Bernabé, GregorioEn este trabajo el término arquitectura se refiere principalmente a la estructura lógica de sus componentes de software. Sin embargo, cuando se requiera, otros aspectos tales como elhardware y el sistema operativo se tienen en cuenta. El objeto del sistema resultante es brindar dos servicios de telemedicina otorrinolaringológica a practicantes en medicina o a doctores en locaciones remotas. En general, el difícil acceso a la prácticay la dificultad de acceder a servicios médicos en locaciones geográficamente remotas son situaciones comunes en América Latina. De acuerdo con esto, un sistema de soporte sería degran ayuda. Los servicios sugeridos, entrenamiento remoto utilizando simulación virtual y soporte remoto a la toma de decisiones, deben estar soportados por una arquitecturaapropiada a la internet. Este documento presenta primero una introducción al proyecto. Seguidamente se describe la novedad del trabajo. A continuación se detallan los servicios y la arquitectura propuestos. Finalmente, se presentan los resultados y una serie de conclusiones y pasos a seguir.Ítem Un método de compresión de mallas basado en una representación simplicial(Universidad Icesi, 2008-12-18) Navarro Newball, Andrés Adolfo; Herrera Botero, Francisco Julián; Múnera Salazar, Luis EduardoPolygonal meshes, which approximate the surface of an object, are the most common method for representing three dimensional objects. Here, in order to attain efficiency, the triangle is the most used polygon. However, the number of required triangles increases as more realism is needed in a complex form. For this reason, mesh optimization techniques have been created that keep resolution and enhances performance. This way, the polygonal mesh occupies less memory space. This paper presents a mesh compression technique which is based on mathematical topology and the simplicial representation. This technique was developed in order to compress meshes that were going to be sent through Internet.Ítem Efficient Mesh Generation Using Subdivision Surfaces(Universidad Icesi, 2008-12-18) Navarro Newball, Andrés Adolfo; Wyvill , Geoff; McCane, BrendanPolygonal meshes and particularly triangular meshes are the most used structure for 3D modelling. The ‘direct edges’ data structure is the most efficient way to represent them and subdivision surfaces is an appropri ate method to generate them. From a review of subdivision surfaces we chose the ‘!3 subdivision’ method for mesh generation. Our main challenge was to take advantage of the direct edges data structure and to find the right formulas for an efficient implementation. We decided to use files in the 3DS file format and convert them to the direct edges data structures for use in our application. We tested our algorithm with arbitrary mesh topologies and calculated efficiency. Our implementation will be used in the creation of a virtual dog head.Ítem Aplicando métodos cualitativos y cuantitativos para mejorar la interfaz gráfica de usuario del simulador de cirugía WESST-OT(Universidad Icesi, 2009-08-18T20:53:57Z) Navarro Newball, Andrés Adolfo; Herrera Botero, Francisco Julián; Ríos Katto, Carlos F.; Peñeñori, Víctor M.The graphic interface (GUI) from the WESST-OT Simulator was validated using quantitative and qualitative human computer interaction (HCI) methods. In order to achieve this, surveys were applied. Also, GUI design principles were analyzed in the context of WESST-OT. Finally, the goals, objects, methods and rule selection quantitative model (GOMS) was applied. The information acquired was used to enhance WESST-OT’s GUI and at the end was validated following the same methodology.Ítem Entorno para el diseño y la práctica con instrumentos quirúrgicos virtuales (WESST-IN)(Universidad Icesi, 2006-10-11) Vélez Beltrán, Jorge Alberto; Cardona, Jaime Andrés; Vera, Adriana Ximena; Navarro Newball, Andrés AdolfoThis work presents a system which allows medicine practitioners to model, to manipulate and to use virtual surgical instruments. The system allows operations like upgrade, modification and inclusion of new surgical instruments; also, it has a graphic interface which facilitates learning and an understandable help system for the final user. This tool contributes to the learning of surgical instrument manipulation for medicine students. On the other hand, the implementation of the system in a WEB environment allows its use by remote practitioners via internet.Ítem Entorno para la visualización y la práctica con sistemas humanos a través de la Web (WESST - HS)(Universidad Icesi, 2006-10-11) Guerra Chávez, Lady J.; Navarro Newball, Andrés Adolfo; Lenis Trujillo, Javier A.; Vélez Beltrán, Jorge AlbertoThis paper presents the development of a Web Environment for Surgical Skills Training on Human Systems (WESST - HS). WESST - HS was conceived in order to satisfy the need to have a generic specification of an organ which could be further used within a surgical simulation. The initial goal was reached and surpassed; at the end, it was found that in medicine is better to treat organs like systems and that WESST - HS could be used independently. The generic specification is included in a web enabled Java application that lets the user interact with system’s and part’s information like shape, size, weight and color. Also, it is possible to display, scale, rotate and translate a three dimensional (3D) representation of the human systems from a file. This article is a description of the elements analyzed and developed in all the stages of the project.Ítem Incorporación de un módulo para la práctica de la habilidad de ubicación espacial al simulador de otorrinolaringología - WESST -OT(Universidad Icesi, 2006-10-11) Mazuera Grisales, Eduardo; Vélez Beltrán, Jorge Alberto; Gamboa , Carlos A.; Herrera Botero, Francisco Julián; Navarro Newball, Andrés Adolfo; Cardona Aristizabal, AndreaWith the development of this project, a great aide is presented to the user of the prototype «Análisis, diseño e implementación del prototipo de un entorno de práctica de habilidades quirúrgicas en Otorrinolaringología». This aide will help the user to acquire the space-anatomic positioning ability, which allows the user to associate what he sees on 2D radiological slices with what he sees through the virtual endoscope of the simulation environment. To achieve the cited ability, the user is presented with radiological images (tomography slices) with red marks that represent the current position of the endoscope he is using in the simulation environment.Ítem Entorno para el intercambio de instrumentos quirúrgicos en un simulador de otorrinolaringología WESST-ST(Universidad Icesi, 2006-10-11) Ramírez Vélez, Andrés Felipe; Roldán Correa, Fernando José; Herrera Botero, Francisco Julián; Navarro Newball, Andrés Adolfo; Vélez Beltrán, Jorge AlbertoIn this paper the development of a complementary module for the WESST - OT simulator is presented. The module allows the interchange of surgical instruments used in a nasal sinus surgery. This module was developed taking into account that in the original simulator it was possible to interact only with an endoscope and that the nasal sinus surgery requires more surgical instruments such as the Blakesley and Kerrison forceps, useful to support other techniques in addition to the orientation skill.Ítem Incorporación de la habilidad de coordinación y del módulo de personalización de sesiones al simulador de otorrinolaringología Wesst-OT(Universidad Icesi, 2007-08-01) Ramírez, Oscar Darío; Ospina C., Angélica María; Hurtado, Lina María; Herrera Botero, Francisco Julián; Castrillón S., Mauricio; Vélez Beltrán, Jorge Alberto; Navarro Newball, Andrés AdolfoThis paper describes the process of incorporating a virtual environment for the practice of the coordination skill to the Web Environment for Surgical Skills in Training in Otolaryngology, WESST - OT. Additionally, a complementary module which allows session customization and the inclusion of anomalies and pathologies in the paranasal region is presented.Ítem Implementación de una API para la interacción del guante P5 con entornos de realidad virtual desarrollados en Java y Java 3D(Universidad Icesi, 2008-03-27) Marín Tobón, César Augusto; Parra S., Ricardo Antonio; Herrera Botero, Francisco Julián; Navarro Newball, Andrés Adolfo; Escallón D., Antonio JoséThis paper presents a specifific API’s implementation process, this API allows the interaction of the P5 glove with virtual reality environments implemented in the programming language Java and its tool Java 3D. Also, an example program is implemented using the API. Then, a CPU and physical memory consumption tests is performed with the example. Finally, the conclusions obtained are specified.