Alberto Asensio López

Provision of QoS in heterogeneous wireless IP access networks

The Internet protocol is being deployed at an ever-increasing pace to offer connectivity to support a wide range of applications. Current research is targeting mobile hosts, and numerous research projects are considering the technologies needed to support the nomadic user. The IST BRAIN and MIND projects have studied the problems using a top-down approach, from user requirements through the application layer all the way to link layer specific issues. This paper presents the results of the study of quality of service provision at the IP layer, to offer service differentiation to application data flows, even over wireless networks.

Digital monopulse receivers for phase modulated signals

The great success achieved by the monopulse technique in the last years and the fact that the new technology is beginning to allow the construction of digital radar receivers, make us thinking about the digital implementation of the monopulse technique. In this paper different architectures based on amplitude and phase measurement are analyzed. Finally, the results of each architecture are given in some figures.

Development of a Computer Writing System Based on EOG

The development of a novel computer writing system based on eye movements is introduced herein. A system of these characteristics requires the consideration of three subsystems: (1) A hardware device for the acquisition and transmission of the signals generated by eye movement to the computer; (2) A software application that allows, among other functions, data processing in order to minimize noise and classify signals; and (3) A graphical interface that allows the user to write text easily on the computer screen using eye movements only. This work analyzes these three subsystems and proposes innovative and low cost solutions for each one of them. This computer writing system was tested with 20 users and its efficiency was compared to a traditional virtual keyboard. The results have shown an important reduction in the time spent on writing, which can be very useful, especially for people with severe motor disorders.

Quality of service aspect for BRAIN architecture

We present different aspects of quality of service that should be adapted to the BRAIN architecture. Several parameters and policies of QoS are depicted. Also, the paper shows the dynamic adaptation of these parameters in the context of BRAIN.

Coherent Signal Processing for Traffic Flow Measuring Radar Sensor

This paper presents a technological demonstrator with traffic applications, which carries out three typical intelligent transportation system (ITS) tasks: traffic flow measurement, speed estimation, and vehicles classification. The proposed system is a frequency-modulated continuous wave radar working at 24 GHz, with side-looking installation. Two signal-processing modes, 1-D and 2-D, are introduced as detection scheme. Unlike other existing commercial systems, this demonstrator makes use of phase information from target echoes in order to perform clutter cancellation and target speed measurement. To this end, two different speed-estimating methods are proposed and compared by means of experimental results obtained from a complex scenario.

X-band ubiquitous radar system: First experimental results

This paper presents the first experimental results of an ubiquitous frequency modulated continuous wave (FMCW) radar system demonstrator, working in the 8.75 GHz (X band). This system, which main application is in the area of surface surveillance radars, has been developed within the framework of the project numbered as TEC2014-53815-R (RAD-DAR), and is currently under its field-testing phase. This article presents the demonstrator and describes its main blocks. Subsequently, it focuses on signal acquisition and digitization, to later explain the offline coherent signal processing carried out with the captured data. After this, the document introduces the chosen scenario for the first field tests, and shows the first results of the offline processing, illustrated with Range-Doppler matrices and detection figures. Finally, the paper introduces future work lines, including the development of a radar data processor taking advantage of the achieved strong range-speed association.

Design of radio frequency subsystems of a ubiquitous radar in X band

The purpose of this paper is to present the design of the radiofrequency subsystems of a ubiquitous radar in X band. This document is focused on the design of the antennas and the receiver. Ubiquitous radars are novel systems that illuminate a huge coverage with a transmitting antenna while receiving echoes from targets by a group of antennas pointing to the same area. The main characteristics of the receiving antennas are summarized as well as their design and measurements of radiation patterns. In the last part of the paper, the block diagram of each receiver is shown and measurements are compared with simulations.

Socio-economic Effects of a HYSOL CSP Plant Located in Different Countries: An Input Output Analysis

The aim of this paper is to estimate the socioeconomic effects associated with the production of electricity by a CSP plant with HYSOL configuration, using Input Output Analysis. These effects have been estimated in terms of production of Goods and Services (G&S), multiplier effect, value added, contribution to GDP, employment creation and labor intensity. The analysis has been performed considering that the plant was established in four countries contemplated as suitable for HYSOL technology: Spain, Mexico, Chile and Kingdom of Saudi Arabia. The results indicate that producing electricity in a HYSOL CSP plant generates positive impacts on the economy and the employment in every country, producing the following ranges of socio-economic effects: a 0.05%-0.38% increment of the national GDP, creation of 11662-21053 jobs-year and production of 1412-2565 M

Radar de alta resolución en distancia onda continua y modulación lineal en frecuencia para la obtención de imágenes ISAR sin compensación de movimiento

of domestic G&S. The economic results are particularly favorable for Spain and Chile, which has been associated with higher multiplier effects (2.05 and 2.01 respectively) and higher demand of G&S in the Operation and Maintenance phase. In the case of Chile, favorable results are also due to the national production of nitrate salts employed in the thermal energy storage system. Employment results are more favorable in Mexico and Chile, which has been associated with the higher labor intensity of its national economies.

QoS Provision and Mobility Management in MIND Access Networks and Ad Hoc Extensions

Este articulo describe la implementacion de una metodologia para la reconstruccion de estructuras anatomicas craneofaciales conformadas por tejidos duros y blandos a partir de imagenes biomedicas de modo que puedan ser utilizadas en aplicaciones que involucren el metodo de los elementos finitos en el area de la bioingenieria. Se logro reconstruir estructuras como mandibula, hueso temporal y algunas piezas dentales de manera satisfactoria, conservando las caracteristicas anatomicas reales de cada estructura y obteniendo un solido conformado por superficies que permiten hacer simulaciones biomecanicas por medio del metodo de los elementos finitos, con posibles aplicaciones en cirugia maxilofacial y ortodoncia.