SOFHIA: a CAD environment to design digital control systems

"Series Title: IFIP - The International Federation for Information Processing, ISSN 1868-4238"

Programmierschnittstellen für eingebettete Netzwerke in Mehrbenutzerbetriebssystemen am Beispiel des Controller Area Network

Magdeburg, Univ., Fak. für Informatik, Diss., 2011

Interfície tridimensional EGP TV digital

En este proyecto se presenta una aplicación capaz de recibir la televisión digital y representar la información que contiene en un entorno de producción de gráficos tridimensionales. Esto conlleva recoger y procesar el flujo de transporte para más de un servicio, procesar las diferentes tablas de información, implementar mecanismos para representar la información audiovisual en un entorno tridimensional y construir una interfaz de usuario con los datos recogidos.

Creación de una radio musical participativa con difusión online y FM

Este proyecto propone crear un sistema inteligente y autónomo de emisión conjunta por Internet y FM. A través de una interfaz Web cómoda y sencilla, el oyente podrá interactuar con la emisora e influir en la emisión, exponiendo sus preferencias. El sistema tomará de forma autónoma y dinámica las decisiones pertinentes que garantizarán que la emisión cumple las preferencias definidas.

Creació d'una ràdio musical participativa amb difusió online i FM

Aquest projecte té com a propòsit crear una ràdio musical participativa amb difusió online i FM on a partir d’una interfície web l’usuari pugui participar-hi activament votant les cançons que hi sonaran. A més a més els usuaris registrats gaudiran d’una xarxa social on podran fer amistats i deixa’ls-hi comentaris. Primer de tot faig una ràpida introducció a l’estat de l’art de les ràdios actuals, a continuació analitzo els requeriments, especifico el comportament desitjat del sistema, explico detalladament el disseny i l’ implementació i, per últim, faig un seguit de proves de les quals n’extrec les conclusions.

Digital beamforming and moving target indication for future spaceborne synthetic aperture radar

During the last decade the interest on space-borne Synthetic Aperture Radars (SAR) for remote sensing applications has grown as testified by the number of recent and forthcoming missions as TerraSAR-X, RADARSAT-2, COSMO-kyMed, TanDEM-X and the Spanish SEOSAR/PAZ. In this sense, this thesis proposes to study and analyze the performance of the state-of-the-Art space-borne SAR systems, with modes able to provide Moving Target Indication capabilities (MTI), i.e. moving object detection and estimation. The research will focus on the MTI processing techniques as well as the architecture and/ or configuration of the SAR instrument, setting the limitations of the current systems with MTI capabilities, and proposing efficient solutions for the future missions. Two European projects, to which the Universitat Politècnica de Catalunya provides support, are an excellent framework for the research activities suggested in this thesis. NEWA project proposes a potential European space-borne radar system with MTI capabilities in order to fulfill the upcoming European security policies. This thesis will critically review the state-of-the-Art MTI processing techniques as well as the readiness and maturity level of the developed capabilities. For each one of the techniques a performance analysis will be carried out based on the available technologies, deriving a roadmap and identifying the different technological gaps. In line with this study a simulator tool will be developed in order to validate and evaluate different MTI techniques in the basis of a flexible space-borne radar configuration. The calibration of a SAR system is mandatory for the accurate formation of the SAR images and turns to be critical in the advanced operation modes as MTI. In this sense, the SEOSAR/PAZ project proposes the study and estimation of the radiometric budget. This thesis will also focus on an exhaustive analysis of the radiometric budget considering the current calibration concepts and their possible limitations. In the framework of this project a key point will be the study of the Dual Receive Antenna (DRA) mode, which provides MTI capabilities to the mission. An additional aspect under study is the applicability of the Digital Beamforming on multichannel and/or multistatic radar platforms, which conform potential solutions for the NEWA project with the aim to fully exploit its capability jointly with MTI techniques.

Utilització d'algorismes genètics per a la composició musical

Aquest memòria presenta un estudi sobre l’aplicació dels algorismes genètics per a lacomposició musical. Es descriu un sistema generador d’un conjunt de melodies i les evoluciona, a través de la iteració de l’algorisme, per a obtenir la millor composició possible, segons unconjunt de normes harmòniques i rítmiques definides arbitràriament.Les regles emprades combinen la modelització de diferents aspectes que la teoria i anàlisimusical occidental contemporani defineix com a essencials per a composar melodies agradables a l’oïda humana. Els trets més importants són melodies amb una certa linealitat, harmonia en lespolifonies i un caràcter rítmic en aquestes composicions.S’ha utilitzat el model d’ Implicació – Realització per a afavorir la linealitat i agradabilitat melòdica, un estudi estadístic de ritme i melodia en peces musicals en format MIDI i la definició per part de l’usuari d’una seqüència d’acords o patró amb el qual les melodies generades hi harmonitzaran.L’algoritme sembla generar satisfactòriament melodies que compleixen amb els aspectesavaluats, i amb la possibilitat de definir diferents seqüències d’acords, el sistema esdevé una eina d’ajuda per a realitzar petites composicions o fragments harmònics d’una manera més automatitzada.

Entornos e-learning como soporte de aprendizaje a la asignatura educación musical en infancia

La música es una asignatura obligatoria dentro de la etapa educativa de primaria. Hemos detectado varios profesores de distintas áreas educativas, entre ellas el área de música, que utilizan plataformas de e-learning y herramientas web como apoyo para enseñar el currículum que marca el “Departament d‟Educació de la Generalitat de Catalunya”. A partir del cuerpo de análisis se ha dibujado el panorama en plataformas de e-learning, analizando las tipologías y usos. A través de la muestra de plataformas de e-learning en educación musical se han detectado cuatro escuelas con plataformas de e-learning en fase avanzada. Se realiza un estudio de caso sobre una de estas plataformas para hacer el análisis de contenidos y validar el formato de entrevista utilizado, esto nos ha servido para crear un modelo que pueda ser utilizado en otros centros con plataforma de e-learning para la asignatura específica de música.

A reusable smart interface for gas sensor resistance measurement

The advances of the semiconductor industry enable microelectromechanical systems sensors, signal conditioning logic and network access to be integrated into a smart sensor node. In this framework, a mixed-mode interface circuit for monolithically integrated gas sensor arrays was developed with high-level design techniques. This interface system includes analog electronics for inspection of up to four sensor arrays and digital logic for smart control and data communication. Although different design methodologies were used in the conception of the complete circuit, high-level synthesis tools and methodologies were crucial in speeding up the whole design cycle, enhancing reusability for future applications and producing a flexible and robust component.

Selection methods regulate evolution of cooperation in digital evolution.

A key, yet often neglected, component of digital evolution and evolutionary models is the 'selection method' which assigns fitness (number of offspring) to individuals based on their performance scores (efficiency in performing tasks). Here, we study with formal analysis and numerical experiments the evolution of cooperation under the five most common selection methods (proportionate, rank, truncation-proportionate, truncation-uniform and tournament). We consider related individuals engaging in a Prisoner's Dilemma game where individuals can either cooperate or defect. A cooperator pays a cost, whereas its partner receives a benefit, which affect their performance scores. These performance scores are translated into fitness by one of the five selection methods. We show that cooperation is positively associated with the relatedness between individuals under all selection methods. By contrast, the change in the performance benefit of cooperation affects the populations' average level of cooperation only under the proportionate methods. We also demonstrate that the truncation and tournament methods may introduce negative frequency-dependence and lead to the evolution of polymorphic populations. Using the example of the evolution of cooperation, we show that the choice of selection method, though it is often marginalized, can considerably affect the evolutionary dynamics.

DESENVOLVIMENTO, AUTOMAÇÃO E DESEMPENHO DE UM CONSOLIDÔMETRO COM INTERFACE HOMEM-MÁQUINA

O ensaio de consolidação preconiza a utilização de um consolidômetro. Esse equipamento, até então, não era produzido e comercializado no Brasil. Os modelos não automatizados disponíveis para importação, apesar da proposta de baixo custo, ainda são rústicos e necessitam de contínua calibração dos níveis de pressão durante a realização do ensaio. A exclusividade e intervenção de um técnico durante todo o ensaio, associada à precária coleta de dados nesses modelos, ainda são os principais fatores que têm inviabilizado a consolidação desse ensaio na ciência do solo brasileira. Como alternativa a esses problemas, este trabalho teve por objetivos desenvolver e automatizar um consolidômetro a partir de um Controlador Lógico Programável (CLP) com interface homem-máquina (IHM). O equipamento é constituído de um gabinete de metal que aloja conjuntos de dispositivos pneumáticos, eletrônico-digital e atuadores de força e posição. O funcionamento de cada dispositivo de forma isolado ou conjugado é gerenciado por meio de um software em linguagem de programação ladder, que, a partir de um CLP com IHM incorporada, possibilita armazenar instruções e implementar funções. A interface entre o PC e o consolidômetro é feita pelo software CA-Linker, v 1.0, projetado especificamente para o equipamento. O uso do CLP com IHM incorporada permitiu o desenvolvimento e a automação do consolidômetro. O desempenho e a eficiência do conjunto de dispositivos (pneumáticos, eletrônico-digital e atuadores de força e pressão) foram comprovados pelos excelentes resultados dos valores de deformação e pressão obtidos em função do tempo e, principalmente, do comportamento da curva de compressão, gerada pelos ensaios de compressão.

Using Digital Video Analysis to Monitor Driver Behavior at Intersections

Commercially available instruments for road-side data collection take highly limited measurements, require extensive manual input, or are too expensive for widespread use. However, inexpensive computer vision techniques for digital video analysis can be applied to automate the monitoring of driver, vehicle, and pedestrian behaviors. These techniques can measure safety-related variables that cannot be easily measured using existing sensors. The use of these techniques will lead to an improved understanding of the decisions made by drivers at intersections. These automated techniques allow the collection of large amounts of safety-related data in a relatively short amount of time. There is a need to develop an easily deployable system to utilize these new techniques. This project implemented and tested a digital video analysis system for use at intersections. A prototype video recording system was developed for field deployment. A computer interface was implemented and served to simplify and automate the data analysis and the data review process. Driver behavior was measured at urban and rural non-signalized intersections. Recorded digital video was analyzed and used to test the system.

Modelado, simulación y control digital de autogiros

Este proyecto consiste en diseñar el algoritmo de control de un autogiro no tripulado. Su aplicación principal es llevar a cabo tareas rutinarias o peligrosas para el piloto como, por ejemplo, extinción de incendios, evaluación de riesgo químico o vigilancia de lugares de acceso restringido. Se realiza un estudio del movimiento del vehículo para obtener su modelo dinámico. A partir de las ecuaciones que describen su movimiento, se realiza una simulación numérica del vehículo. Se incorpora el controlador diseñado y se evalúa su funcionamiento. Finalmente, se implementa el sistema en un microcontrolador.

Estudi digital per a guitarra

El treball de fi de carrera "Estudi digital per a guitarra" fa una anàlisi d'un tipus de programari dedicat a la música, i més concretament a l'instrument de la guitarra. En ell s'analitzen programes per gravar àudio, editors de partitures, estudis d'àudio digital, efectes, emuladors, etc., tot muntat sobre un sistema GNU/Linux.

Mueller matrix microscope with a dual continuous rotating compensator setup and digital demodulation

In this paper we describe a new Mueller matrix (MM) microscope that generalizes and makes quantitative the polarized light microscopy technique. In this instrument all the elements of the MU are simultaneously determined from the analysis in the frequency domain of the time-dependent intensity of the light beam at every pixel of the camera. The variations in intensity are created by the two compensators continuously rotating at different angular frequencies. A typical measurement is completed in a little over one minute and it can be applied to any visible wavelength. Some examples are presented to demonstrate the capabilities of the instrument.