ADQPCI: Data Acquisition Board for Educational purposes

En este trabajo se presenta una de las placas de adquisición de datos que se ha desarrollado con fines docentes para su utilización en prácticas relacionadas con sistemas en tiempo real e informática industrial y se plantean algunas de las ventajas e inconvenientes frente a la utilización de placas comerciales. A lo largo del trabajo se detalla el diseño del hardware, en el que se ha priorizado la facilidad de programación, siendo ésta una de las ventajas frente a las placas comerciales. En estas prácticas es fundamental que el alumno tome conciencia de la importancia de la interfaz hardware-software, si se quiere conseguir un sistema fiable y que explote al máximo las características del hardware. Con el desarrollo de una placa de adquisición de datos se consigue un sistema que el alumno puede utilizar en varias asignaturas de su titulación que están relacionadas con el desarrollo y programación de sistemas empotrados.In this work a data acquisition board developed for educational use in subjects related to real-time systems and industrial computing, is presented. The main advantages and disadvantages of using these boards versus the use of commercial boards are discussed. The hardware design described along this work emphasizes the facility of programming the board, which is one of the main advantages versus the commercial boards. In these practices it is essential that student comprehend the importance of the hardware-software interface in order to obtain a reliable system which exploits in a maximum way the characteristics of the hardware. The development of a data acquisition board allows to obtain a system that the students can use in several course during his university career which are related to the development and programming of embedded system

CAN2PCI: Board with Interface to CAN and PCI Bus for educational purposes

En este trabajo se presenta una placa con interfaz al bus CAN y PCI desarrollada para la utilización en prácticas de las asignaturas relacionadas con redes de control. Se trata de una placa de altas prestaciones pensada para su utilización docente gracias a su facilidad de programación. La placa dispone de dos canales CAN independientes y permite acceso directo a los registros del controlador CAN. Las prácticas tienen como objetivo conocer la red de control en los niveles físico y de enlace y desarrollar un software de conectividad (middleware) que realice la interfaz entre estas capas y la de aplicación de usuario. Se exponen también brevemente las prácticas realizadas en una de las asignaturas donde se imparte redes de control, en la que es fundamental la utilización de un hardware conocido que permita programar las funciones básicas que operan directamente con el controlador de bus CANIn this work the development of a board with interface to the CAN and PCI bus for its use in lab courses related to control networks, is presented. This board has high benefits and advantages and has been implemented for educational purposes due to its programming facility. The board has two independent CAN channels and it allows direct access to the registers of the CAN controller. The objective of the lab experiments is to study the control networks in the physical and link levels and to develop a middleware that performs the interface between these layers and the user application. The experiments done in one of the courses, which includes control networks, are briefly described. In these practical labs it is very important the use of a known hardware that allows programming the basic functions which directly operate with the CAN bus controlle

Fracturas supracondíleas sobre prótesis total de rodilla

Presentamos 7 casos de fractura del extreme distal del fémur en pacientes con sustitución total de rodilla. El propósito del estudio consiste en valorar las distintas opciones terapéuticas y los resultados obtenidos a medio plazo. Los enfermos fueron tratados quirúrgicamente mediante un clavo intramedular u ortopédicamente con un sistema de tracción de Neufeld de una férula de tipo Q.T.B. El método de tratamiento se decidió en función del grado de desplazamiento de la fractura, tiempo transcurrido desde la misma y estado general del paciente. Todos alcanzaron un nivel de actividad similar al que poseían previo a la fractura.We present 7 cases of supracondylar fracture of the femur in patients with total knee arthroplaty. The purpose of this study was to asses the different options of treatment and their results at mid-term. Fractures were treated with an intramedular nail or with a Neufeld traction system followed by a Q.T.B. cast. The method of treatment depends on the grade of fracture displacement, period of time since the fracture and patient health. All o them reached similar level of activity like before the fracture

Multipactor radiation analysis within a waveguide region based on a frequency-domain representation of the dynamics of charged particles

A technique for the accurate computation of the electromagnetic fields radiated by a charged particle moving within a parallel-plate waveguide is presented. Based on a transformation of the time-varying current density of the particle into a time-harmonic current density, this technique allows the evaluation of the radiated electromagnetic fields both in the frequency and time domains, as well as in the near- and far-field regions. For this purpose, several accelerated versions of the parallel-plate Green’s function in the frequency domain have been considered. The theory has been successfully applied to the multipactor discharge occurring within a two metal-plates region. The proposed formulation has been tested with a particle-in-cell code based on the finite- difference time-domain method, obtaining good agreement.The authors would like to thank ESA/ESTEC for having funded this research activity through the Contract “RF Breakdown in Multicarrier Systems” ͑Contract No. 19918/06/NL/GLC͒

A telemedicine distributed system for cooperative medical diagnosis

Procceedings of: Eighteenth Annual Symposium on Computer Aplications in Medical Care, november 5-9, 1994, Washington, USA. Edited by Judy G. OzboltTelemedicine is changing the classicalform of health care delivery, dramatically increasing the number of new applications in which some type of distributed synchronous cooperation between health care professionals is required. This paper presents the design and development ofa telemedicine distributed system for cooperative medical diagnosis based on two new approaches: 1) a distributed layered architecture specially designed to add synchronous computer supported cooperative workfeatures either to new or existing medical applications; 2) the definition of a methodological procedure to design graphical user interfaces for telemedicine cooperative working scenarios. The cooperative work is supported by a collaborative toolkit that provides telepointing, window sharing, coordination and synchronization. Finally, we have implemented and installed the telemedicine system in clinical practice between two hospitals, providing teleconferencing facilities for cooperative decision support in haemodynamics studies. This specific implementation and a preliminary evaluation were accomplished under the Research Project FEST "Framework for European Services in Telemedicine" funded by the EU AIM Programme.This work is supported in part by EU - AIM FEST project no. A-201 1, and by grants CICYT TEMA TIC 92-1288-PB and TELEMEDICINA TIC 93-1279-E.Publicad

Museum of the history of computers

El grupo docente de Arquitectura de Computadores tiene en su haber una gran cantidad de dispositivos relacionados con la historia del PC. Este material se encontraba confinado en un almacén y el objetivo principal a desarrollar en este trabajo se basa en explotar ese material desaprovechado para que nuestros alumnos de las titulaciones de los Grados en Informática (especialmente los alumnos de la especialidad de Ingeniería de Computadores), Física y Electrónica, se enriquezcan viendo físicamente materiales de los que se les habla en distintas asignaturas.The Computer Architecture group has a high number of devices related to the history of the computers. This material was stored in a warehouse and the aim to develop in this paper is based on exploiting these devices so that our students of degrees in computer science (especially students of the speciality of computer engineering), physics and electronics, can view physically the materials described in different subjects

A divide-and-conquer approach for genomic prediction in rubber tree using machine learning

International audienceRubber tree ( Hevea brasiliensis ) is the main feedstock for commercial rubber; however, its long vegetative cycle has hindered the development of more productive varieties via breeding programs. With the availability of H. brasiliensis genomic data, several linkage maps with associated quantitative trait loci have been constructed and suggested as a tool for marker-assisted selection. Nonetheless, novel genomic strategies are still needed, and genomic selection (GS) may facilitate rubber tree breeding programs aimed at reducing the required cycles for performance assessment. Even though such a methodology has already been shown to be a promising tool for rubber tree breeding, increased model predictive capabilities and practical application are still needed. Here, we developed a novel machine learning-based approach for predicting rubber tree stem circumference based on molecular markers. Through a divide-and-conquer strategy, we propose a neural network prediction system with two stages: (1) subpopulation prediction and (2) phenotype estimation. This approach yielded higher accuracies than traditional statistical models in a single-environment scenario. By delivering large accuracy improvements, our methodology represents a powerful tool for use in Hevea GS strategies. Therefore, the incorporation of machine learning techniques into rubber tree GS represents an opportunity to build more robust models and optimize Hevea breeding programs

A divide-and-conquer approach for genomic prediction in rubber tree using machine learning

International audienceRubber tree ( Hevea brasiliensis ) is the main feedstock for commercial rubber; however, its long vegetative cycle has hindered the development of more productive varieties via breeding programs. With the availability of H. brasiliensis genomic data, several linkage maps with associated quantitative trait loci have been constructed and suggested as a tool for marker-assisted selection. Nonetheless, novel genomic strategies are still needed, and genomic selection (GS) may facilitate rubber tree breeding programs aimed at reducing the required cycles for performance assessment. Even though such a methodology has already been shown to be a promising tool for rubber tree breeding, increased model predictive capabilities and practical application are still needed. Here, we developed a novel machine learning-based approach for predicting rubber tree stem circumference based on molecular markers. Through a divide-and-conquer strategy, we propose a neural network prediction system with two stages: (1) subpopulation prediction and (2) phenotype estimation. This approach yielded higher accuracies than traditional statistical models in a single-environment scenario. By delivering large accuracy improvements, our methodology represents a powerful tool for use in Hevea GS strategies. Therefore, the incorporation of machine learning techniques into rubber tree GS represents an opportunity to build more robust models and optimize Hevea breeding programs

An analytical model to evaluate the radiated power spectrum of a multipactor discharge in a parallel-plate region

This paper is aimed at studying the electromagnetic radiation pattern of a multipactor discharge occurring in a parallel-plate waveguide. The proposed method is based on the Fourier expansion of the multipactor current in terms of timeharmonic currents radiating in the parallel-plate region. Classical radiation theory combined with the frequency domain Green’s function of the problem allows the calculation of both the electric and the magnetic radiated fields. A novel analytical formula for the total radiated power of each multipactor harmonic has been derived. This formula is suitable for predicting multipactor with the third-harmonic technique. The proposed formulation has been successfully tested with a particle-in-cell code