Ingenieria En Sistemas

Bioinformatics is a new research area which integrates many core subjects such as biology, medicine, computer science, and mathematics. Since most of the problems in bioinformatics are inherently hard researches have used artificial intelligence techniques to solve such problems. Artificial neural networks are one such method used in many situations and have proved to be very effective. This paper will focus on issues related to construction of a neural network to solve bioinformatics problems and describes some of its current applications.

Los juegos de azar tienen una antigüedad de más de 40000 años; así por ejemplo, los dados se utilizaron tanto en el juego como en ceremonias religiosas. Las civilizaciones antiguas explicaban el azar mediante la voluntad divina. En el Renacimiento el abandono progresivo de explicaciones teológicas conduce a una reconsideración de los experimentos aleatorios.

Second-generation mobile radio systems have been deployed successfully worldwicte and have evolved to highcr data ratcs and serviccs. Thirdgeneration mobile radio systems are currently starting to be developed in different regions of the world. Today, the open question is how the third-generation systems will evolve. It is very likely that fourth-generation systcms will not bc a single standardized air interface, hut a set of differcnt technologics and standards. In particular, wireless LANiwirelcss PAN typc systems arc designed for highimedium-data-rate access, low rangc, and, in gcncral, low mobility. Thcy are applicable to corporatc networks and public access as a complement to cellular mobile radio systems for hot spot applications such as airports, hotels, and campuses. In this specilic WLANiWPAN framework and to guarantee an agrecd QoS provision over such infrastructures, we propose a solution based on the wireless adaptation layer approach. I n particular, aspects related to wireless link impairments and traffic requirements are approached by the implementation of configurable, modular software that is adapted to the specific conditions and needs of the particular wireless infrastructures.

LMDS is currently a promising emerging technology in broadband fixed wireless communications. Cellular structure, high data rates, and flexibility make it perfect for multimedia, digital television, and interactive services. These highbandwidth multimedia services received most of the research attention until lately. Until recently there has been a clear gap when considering UDP/TCP/IP and other data services over LMDS. In this article we examine the ramifications of using standard TCP/IP data communication over a two-layer LMDS system. We argue that the former emphasis only on multimedia and ATM-based communication over LMDS was a mistake. The most exciting prospect for LMDS should be in the role of enabling Internet and data services together with multimedia. We introduce a basic architecture for two-layer IP-LMDS based on a trial network built between 1996 and 2000.

The aim of this paper is to characterize the behavior of the UDP transport protocol, mainly in terms of throughput and average delay, over an IEEE 802.11b compliant wireless local area network (WLAN) from an experimental approach. Although performance evaluation of these kinds of LAN is being extensively discussed in the current literature, most of these studies are analytical or simulation-based and they do not consider the influence of channel impairments or link quality over network throughput. After an exhaustive measurement campaign, different performance parameters such as throughput, goodput, effective goodput, frame error rate, IT loss rate, delay and jitter have been obtained. This could be a preliminary analysis of the behavior of real-time traffic over WLAN infrastructures, such as streaming audio and voice transmission, services that are expected to undergo substantial growth in the coming years. All these studies and results have been developed in the context of the WINE (Wireless Internet Networks) project belonging to the framework of the Information Society Technologies (IST) programme, addressed to enhancing the performance of TCP/IP protocol over WLAN such as IEEE 802.11, Bluetooth and HIPERLAN/2

Second-generation mobile radio systems have been deployed successfully worldwicte and have evolved to highcr data ratcs and serviccs. Thirdgeneration mobile radio systems are currently starting to be developed in different regions of the world. Today, the open question is how the third-generation systems will evolve. It is very likely that fourth-generation systcms will not bc a single standardized air interface, hut a set of differcnt technologics and standards. In particular, wireless LANiwirelcss PAN typc systems arc designed for highimedium-data-rate access, low rangc, and, in gcncral, low mobility. Thcy are applicable to corporatc networks and public access as a complement to cellular mobile radio systems for hot spot applications such as airports, hotels, and campuses. In this specilic WLANiWPAN framework and to guarantee an agrecd QoS provision over such infrastructures, we propose a solution based on the wireless adaptation layer approach. I n particular, aspects related to wireless link impairments and traffic requirements are approached by the implementation of configurable, modular software that is adapted to the specific conditions and needs of the particular wireless infrastructures.

Second-generation mobile radio systems have been deployed successfully worldwicte and have evolved to highcr data ratcs and serviccs. Thirdgeneration mobile radio systems are currently starting to be developed in different regions of the world. Today, the open question is how the third-generation systems will evolve. It is very likely that fourth-generation systcms will not bc a single standardized air interface, hut a set of differcnt technologics and standards. In particular, wireless LANiwirelcss PAN typc systems arc designed for highimedium-data-rate access, low rangc, and, in gcncral, low mobility. Thcy are applicable to corporatc networks and public access as a complement to cellular mobile radio systems for hot spot applications such as airports, hotels, and campuses. In this specilic WLANiWPAN framework and to guarantee an agrecd QoS provision over such infrastructures, we propose a solution based on the wireless adaptation layer approach. I n particular, aspects related to wireless link impairments and traffic requirements are approached by the implementation of configurable, modular software that is adapted to the specific conditions and needs of the particular wireless infrastructures.

LMDS is currently a promising emerging technology in broadband fixed wireless communications. Cellular structure, high data rates, and flexibility make it perfect for multimedia, digital television, and interactive services. These highbandwidth multimedia services received most of the research attention until lately. Until recently there has been a clear gap when considering UDP/TCP/IP and other data services over LMDS. In this article we examine the ramifications of using standard TCP/IP data communication over a two-layer LMDS system. We argue that the former emphasis only on multimedia and ATM-based communication over LMDS was a mistake. The most exciting prospect for LMDS should be in the role of enabling Internet and data services together with multimedia. We introduce a basic architecture for two-layer IP-LMDS based on a trial network built between 1996 and 2000.

The aim of this paper is to characterize the behavior of the UDP transport protocol, mainly in terms of throughput and average delay, over an IEEE 802.11b compliant wireless local area network (WLAN) from an experimental approach. Although performance evaluation of these kinds of LAN is being extensively discussed in the current literature, most of these studies are analytical or simulation-based and they do not consider the influence of channel impairments or link quality over network throughput. After an exhaustive measurement campaign, different performance parameters such as throughput, goodput, effective goodput, frame error rate, IT loss rate, delay and jitter have been obtained. This could be a preliminary analysis of the behavior of real-time traffic over WLAN infrastructures, such as streaming audio and voice transmission, services that are expected to undergo substantial growth in the coming years. All these studies and results have been developed in the context of the WINE (Wireless Internet Networks) project belonging to the framework of the Information Society Technologies (IST) programme, addressed to enhancing the performance of TCP/IP protocol over WLAN such as IEEE 802.11, Bluetooth and HIPERLAN/2

LMDS is currently a promising emerging technology in broadband fixed wireless communications. Cellular structure, high data rates, and flexibility make it perfect for multimedia, digital television, and interactive services. These highbandwidth multimedia services received most of the research attention until lately. Until recently there has been a clear gap when considering UDP/TCP/IP and other data services over LMDS. In this article we examine the ramifications of using standard TCP/IP data communication over a two-layer LMDS system. We argue that the former emphasis only on multimedia and ATM-based communication over LMDS was a mistake. The most exciting prospect for LMDS should be in the role of enabling Internet and data services together with multimedia. We introduce a basic architecture for two-layer IP-LMDS based on a trial network built between 1996 and 2000.

The aim of this paper is to characterize the behavior of the UDP transport protocol, mainly in terms of throughput and average delay, over an IEEE 802.11b compliant wireless local area network (WLAN) from an experimental approach. Although performance evaluation of these kinds of LAN is being extensively discussed in the current literature, most of these studies are analytical or simulation-based and they do not consider the influence of channel impairments or link quality over network throughput. After an exhaustive measurement campaign, different performance parameters such as throughput, goodput, effective goodput, frame error rate, IT loss rate, delay and jitter have been obtained. This could be a preliminary analysis of the behavior of real-time traffic over WLAN infrastructures, such as streaming audio and voice transmission, services that are expected to undergo substantial growth in the coming years. All these studies and results have been developed in the context of the WINE (Wireless Internet Networks) project belonging to the framework of the Information Society Technologies (IST) programme, addressed to enhancing the performance of TCP/IP protocol over WLAN such as IEEE 802.11, Bluetooth and HIPERLAN/2

Lea cuidadosamente las preguntas y luego las contesta marcando la respuesta, las pregunta 1 y 2 cada punto vale 0.3, el punto 3 tiene un valor de 1.0 , la pregunta 4 tiene valor de 0,5 , el punto 5 vale 1.0, 14 y 15 y 16 vale 0.5 , 17 vale 0.3 y 18 vale 0.7.

Nuestra misión es cubrir las necesidades de los empresarios en el manejo de su información diseñando programas que se ajustan a sus necesidades, permitiendo la disminución de los costos empresariales asociados con el trabajo y los procesos de producción, al mismo tiempo que prestamos un servicio de

En el presente artículo se examinan las posibles ventajas que se incorporan en un curso de programación de computadores de Ingeniería de Sistemas de primer semestre cuando se implementa una metodología basada en la teoría por descubrimiento y se sirve durante las sesiones prácticas. La metodología se enmarcó en la investigación educativa de carácter cualitativa, articulada con un estudio de casos instrumental y múltiple. Los datos se obtuvieron en las sesiones prácticas durante las cuales se recolectó tanto la opinión de los estudiantes como la observación de sus avances individuales en el desarrollo y solución de los ejercicios propuestos. Los resultados evidencian aprendizajes más significativos cuando se permite que el estudiante, partiendo de los conocimientos previos, pueda inferir el nuevo conocimiento de la mano de explicaciones magistrales que les brinden las semillas necesarias para poder avanzar de manera autónoma. De la misma manera, esta metodología posibilita independen...

El presente artículo aborda el tema de los paradigmas  de  programación  explicándolos  de  una manera simple y presentándolos en una línea de tiempo conceptual que puede interpretarse como una  necesidad  en  la  evolución  del  pensamiento humano. Se hace una breve descripción, no solo de los paradigmas sino de sus aplicaciones, que a  la  postre  también  se  han  asimilado  y  entendido como paradigmas y, se presentan algunas reflexiones acerca de la incidencia que ha tenido la evolución  del  pensamiento  en  conjunto  con  las nuevas necesidades del ser humano como de su proyección en el tiempo y lo que podría sobrevenir en el mundo de la programación de computadores en un futuro no muy lejano.

Una de las dificultades que, con frecuencia, se presenta en los currículos de Ingeniería de Siste­mas es el hecho de que se establecen pocas rela­ciones entre lo que los estudiantes han aprendido en una asignatura de programación y lo que van a aprender en otra. Este artículo plantea una pro­puesta para que se puedan establecer, desde la primera sesión, relaciones entre el paradigma de programación funcional (utilizando DrScheme como instancia tecnológica) y el paradigma de programación estructurada (utilizando DevC++ en su arista estructurada) como lenguaje de pro­gramación. Se plantean las experiencias recogi­das al respecto de la aplicación de esta estrategia y, sobre los resultados se presentan algunas reflexiones que pueden enriquecer el desarrollo de la línea de programación en los programas de In­geniería a partir de las relaciones que se pueden establecer tanto entre paradigmas de programa­ción como entre los lenguajes de programación con miras a que el camino de aprendizaje...