Dual-Band Antenna/AMC Combination for RFID

A novel antenna/Artificial Magnetic Conductor (AMC) combination usable in dual-band Radio Frequency Identification (RFID) tags over metallic objects is presented. A compact and low thickness prototype is manufactured and characterized in terms of return loss and radiation properties in an anechoic chamber both alone and on a metallic plate. The performance exhibited by the presented antenna/AMC prototype is proper for RFID tags on both metallic and nonmetallic objects

Diseño y construcción de un microrrobot (EUROBOT09)

Este proyecto comenzó con la idea de participar en la competición internacional Eurobot 2009, realizada en la ciudad de La Ferté-Bernard, Francia; para ello había que construir un microrobot autónomo capaz de clasificarse entre los tres primeros en la competición nacional, la Copa de España, realizada en la Universidad Politécnica de Alcalá de Henares, Madrid. La construcción y programación del microrobot fue posible gracias a un equipo formado por siete personas. Dos de ellas dedicadas a la programación, una a la tracción y posicionamiento, otra al sistema sensorial, una dedicada a las etapas de potencia y demás placas de control, otra al sistema de recogida elevación y colocación de las piezas, y por ultimo, de lo que trata este proyecto, del ensamblado e implementación de todos los sistemas antes mencionados, los cuales serán descritos a lo largo de este documento. Este desarrollo se llevó a cabo durante siete meses aproximadamente, en el Laboratorio de Sistemas Inteligentes (L.S.I.) del departamento de Ingeniería de Sistemas y Automática de la Universidad Carlos III de Madrid. La presente memoria comprende el diseño y la realización de todos los elementos que componen este microrobot autónomo.Ingeniería Técnica en Electrónic

Density-functional study of defects in two-dimensional circular nematic nanocavities

We use density--functional theory to study the structure of two-dimensional defects inside a circular nematic nanocavity. The density, nematic order parameter, and director fields, as well as the defect core energy and core radius, are obtained in a thermodynamically consistent way for defects with topological charge $k=+1$ (with radial and tangential symmetries) and $k=+1/2$. An independent calculation of the fluid elastic constants, within the same theory, allows us to connect with the local free--energy density predicted by elastic theory, which in turn provides a criterion to define a defect core boundary and a defect core free energy for the two types of defects. The radial and tangential defects turn out to have very different properties, a feature that a previous Maier--Saupe theory could not account for due to the simplified nature of the interactions --which caused all elastic constants to be equal. In the case with two $k=+1/2$ defects in the cavity, the elastic r\'egime cannot be reached due to the small radii of the cavities considered, but some trends can already be obtained.Comment: 9 figures. Accepted for publication in liquid crystal

Web based system architecture for long pulse remote experimentation

Remote experimentation (RE) methods will be essential in next generation fusion devices. Requirements for long pulse RE will be: on-line data visualization, on-line data acquisition processes monitoring and on-line data acquisition systems interactions (start, stop or set-up modifications). Note that these methods are not oriented to real-time control of fusion plant devices. INDRA Sistemas S.A., CIEMAT (Centro de Investigaciones Energéticas Medioambientales y Tecnológicas) and UPM (Universidad Politécnica de Madrid) have designed a specific software architecture for these purposes. The architecture can be supported on the BeansNet platform, whose integration with an application server provides an adequate solution to the requirements. BeansNet is a JINI based framework developed by INDRA, which makes easy the implementation of a remote experimentation model based on a Service Oriented Architecture. The new software architecture has been designed on the basis of the experience acquired in the development of an upgrade of the TJ-II remote experimentation system

Capillary and anchoring effects in thin hybrid nematic films and connection with bulk behavior

By means of a molecular model, we examine hybrid nematic films with antagonistic anchoring angles where one of the surfaces is in the strong anchoring regime. If anchoring at the other surface is weak, and in the absence of wetting by the isotropic phase, the anchoring transition may interact with the capillary isotropic-nematic transition in interesting ways. For general anchoring conditions on this surface we confirm the existence of the step-tilt, biaxial phase and the associated transition to the linear, constant-tilt-rotation, configuration. The step-like phase is connected with the bulk isotropic phase for increasing film thickness so that the latter transition is to be interpreted as the capillary isotropic-nematic transition. Finally, we suggest possible global surface phase diagrams.Comment: 7 pages, 5 figure

Instauración y tareas de un servicio de psicología del deporte en un club de fútbol profesional

El objetivo de este estudio es describir la instauración y los principales logros de un servicio de psicología del deporte en un club de fútbol desde su inicio. Además se explican las dos principales herramientas que utiliza el servicio: 1) una adaptación del Coach Behavioral Assessment System (CBAS) (observación de los entrenadores) y 2) el Programa de Seguimiento Semanal (PSS) (evaluación de los jugadores a través de los 20 entrenadores del club). Se desarrollan de forma descriptiva los logros que demuestran la posibilidad de introducir características psicológicas en los procedimientos técnicos de un club formativo a través de la inclusión de criterios psicosociales para controlar la evolución y progresión de los jóvenes, así como prevenir el abandono.The aim of this study is to describe the establishment and fundamental achievements of a sport psychology department in a football club from its introduction. Moreover, this study explains the two main tools which are used: 1) An adaptation of the Coach Behavioral Assessment System (CBAS) (observing coaches) and 2) the Weekly Monitoring Program (PSS) (evaluating players through the 20 coaches at the club). In this study, the achievements that demonstrate the possibility of introducing psychological features into the technical procedures of a training club through the inclusion of psychosocial criteria in order to control the development and progression of youngsters, as well as to prevent abandonment, were obtained in a descriptive way.O objectivo deste estudo é descrever a instauração e os principais êxitos de um serviço de psicologia do desporto num clube de formação desde o seu início. Adicionalmente são explicadas as duas principais ferramentas utilizadas neste serviço: 1) uma adaptação do Coach Behavioral Assessment System (CBAS) (observação dos treinadores) e 2) o Programa de Acompanhamento Semanal (PSS) (avaliação dos jogadores através dos 20 treinadores do clube). São abordados descritivamente os êxitos alcançados que demonstram a possibilidade de introduzir características psicológicas nos procedimentos técnicos de um clube formativo através da inclusão de critérios psicossociais para monitorizar a evolução e progressão dos jovens, assim como prevenir o abandono

Multiline operation from a single plasmon-assisted laser

The demonstration of plasmon-assisted lasing by associating optical gain media with plasmonic nanostructures has led to a new generation of nanophotonic devices with unprecedented performances. However, despite the variety of designs demonstrated so far, the operation of these systems is in most cases limited to a single output wavelength, and some reports on multiline emission refer to mixing single nanolasers with the subsequent limitation in compactness. Here, we show multiline operation from a single plasmon-assisted nonlinear solid-state laser on which a linear chain of Ag nanoparticles is deposited. The system provides lasing at 1.08 μm, which is self-converted to the visible range through different parametric frequency-mixing processes generated at metal-dielectric interfaces. Near infrared and simultaneously green and tunable blue radiation with a subwavelength confinement in the direction perpendicular to the nanoparticle chain, are obtained at room temperature in CW regime. The results demonstrate the possibility of multifunctional operation from a single plasmon-assisted laser and offer new avenues for the development of highly integrable sources of coherent radiationThis work has been supported by the Spanish Ministry of Economy and Competitiveness (MINECO) under Projects MAT201343301-R, MAT2015-66128-R and MAT2016-76106-R and by Comunidad de Madrid under Grant S2013/MIT-274

Service-oriented architecture of adaptive, intelligent data acquisition and processing systems for long-pulse fusion experiments

The data acquisition systems used in long-pulse fusion experiments need to implement data reduction and pattern recognition algorithms in real time. In order to accomplish these operations, it is essential to employ software tools that allow for hot swap capabilities throughout the temporal evolution of the experiments. This is very important because processing needs are not equal during different phases of the experiment. The intelligent test and measurement system (ITMS) developed by UPM and CIEMAT is an example of a technology for implementing scalable data acquisition and processing systems based on PXI and CompactPCI hardware. In the ITMS platform, a set of software tools allows the user to define the processing algorithms associated with the different experimental phases using state machines driven by software events. These state machines are specified using the State Chart XML (SCXML) language. The software tools are developed using JAVA, JINI, an SCXML engine and several LabVIEW applications. Within this schema, it is possible to execute data acquisition and processing applications in an adaptive way. The power of SCXML semantics and the ability to work with XML user-defined data types allow for very easy programming of the ITMS platform. With this approach, the ITMS platform is a suitable solution for implementing scalable data acquisition and processing systems based on a service-oriented model with the ability to easily implement remote participation applications