Title: Working in the city: The knowledge city, experience from Barcelona's Metropolitan Centre Authors: Marmolejo Duarte, Carlos Ramiro

Title: E-T-lipschitzian and E-T-kernel aggregation operators Authors: Jacas Moral, Juan; Recasens Ferrés, Jorge Abstract: Lipschitzian and kernel aggregation operators with respect to natural T-indistinguishability operators ET and their powers are studied. A t-norm T is proved to be ET-lipschitzian, and is interpreted as a fuzzy point and a fuzzy map as well. Given an archimedean t-norm T with additive generator t, the quasi-arithmetic mean generated by t is proved to be the most stable aggregation operator with respect to T.

Title: Aggregation of T-transitive Relations Authors: Jacas Moral, Juan; Recasens Ferrés, Jorge Abstract: This article studies the aggregation of transitive fuzzy relations. We first find operators that preserve transitivity and then extend the results to aggregating operators. As special cases, means and some kind of suitable ordered weighted averaging (OWAs) are used to aggregate transitive fuzzy relations with respect to an Archimedean t-norm. Three families of transitive relations that allow us to modify the entries of a given relation R continuously towards the smallest and the greatest ones in our universe are given. Aggregation of nonfinite families of transitive relations also is studied and applied to calculate the degree of inclusion or similarity of fuzzy quantities (fuzzy subsets of an interval of the real line). © 2003 Wiley Periodicals, Inc.

Title: Fuzzy t-transitive relations: eigenvectors and generators Authors: Jacas Moral, Juan; Recasens Ferrés, Jorge Abstract: After some preliminaries, the set of generators of a generalized equality relation (T-indistinguishability operator) is studied. This set is identified with the set of the eigenvectors of the relation. The relation between the fuzzy and “metric” topologies derived from these equalities is stablished. The concept of basis is introduced and the construction of a procedure in order to calculate explicitly a basis of a T-indistinguishability operator, for T archimedean, is proposed.

Title: Validation of Data Association for Monocular SLAM Authors: Guerra Paradas, Edmundo; Munguia Alcala, Rodrigo; Bolea Monte, Yolanda; Grau Saldes, Antoni Abstract: SimultaneousMapping and Localization (SLAM) is amultidisciplinary problem with ramifications within several fields. One of the key aspects for its popularity and success is the data fusion produced by SLAM techniques, providing strong and robust sensory systems even with simple devices, such as webcams in Monocular SLAM. This work studies a novel batch validation algorithm, the highest order hypothesis compatibility test (HOHCT), against one of the most popular approaches, the JCCB. The HOHCT approach has been developed as a way to improve performance of the delayed inverse-depth initialization monocular SLAM, a previously developed monocular SLAM algorithm based on parallax estimation. Both HOHCT and JCCB are extensively tested and compared within a delayed inverse-depth initialization monocular SLAM framework, showing the strengths and costs of this proposal.

Title: SIXE: A Payload for MINISAT-02 Authors: Gómez, J; Isern Vilaboy, Jordi; Bravo Guil, Eduardo; Giovannelli, F; Padula, C L Abstract: A description of the X-ray instrument SIXE proposed for the MINISAT-02 mission is presented. The description includes the scientific goals and instrument performances.

Title: El Sofà de la Dele Authors: Grup de Teatre de l'FME Description: Repartiment: Eli Albanell, Carlos Florensa, Adrià González, Clàudia Masós, Marta Pérez, Marta Pita, Alba Puy, Juan Pedro Roldan, Eudal Romo i Ana Valdivia

Title: 02. Body, Mind & Imagination Authors: Pallasmaa, Juhani Description: Conferència de Juhani Pallasmaa, Arquitecte i professor a la Helsinki University of Technology, per al cicle "5 Posicions" organitzat per Jaume Bach, Professor de Projectes Arquitectònics. Presentat per Ferran Sagarra, Director de l'ETSAB i Ariadna Perich, Professora de Projectes i Adjunta a Direcció.

Title: Proyecto de construcción de la M-410 entre Parla y Valdemoro (Madrid) Authors: Huerta Calpe, Marc Abstract: El presente proyecto de construcción tiene por objeto el definir las obras necesarias para la construcción de una carretera de nuevo trazado que constituirá la variante Sur de Parla, conectándose al inicio con el tramo anterior de la M-410 y sirviendo de unión con la N-IV en su punto final. Las circunstancias que justifican la actuación son la mejora de la movilidad transversal en la periferia sur de la Comunidad de Madrid así como del tráfico de largo recorrido al permitir la unión de la N-IV con la N-V.

Title: Vivienda en Girona Authors: Mias Gifré, Josep

Title: Estimación de riesgo sobre la salud de población/trabajadores de región industrial por contaminación de partículas suspendidas totales y óxido de azufre Authors: Rincón Polo, Gladys; Cremades Oliver, Lázaro Vicente Abstract: En regiones donde coexisten industrias pesadas con centros poblados, los trabajadores de esas industrias no sólo están expuestos a riesgos por contaminación dentro del ámbito de trabajo, sino además, están expuestos constantemente por vivir en un ambiente contaminado por las emisiones de las industrias para las cuales trabajan. En Venezuela en una franja costera de unos 90 km, cohabitan 11 industrias pesadas (petroquímicas, petroleras y cementeras) que emiten aproximadamente 4790 t/año de partículas suspendidas totales (PST) y 8376 t/año de dióxido de azufre (SO2), con 5 pequeñas ciudades que concentran 658 969 habitantes, quienes trabajan mayoritariamente de manera directa o indirecta para esas industrias. Dada la limitación para disponer de un número de estaciones de muestreo que permita establecer los niveles de concentración de estos contaminantes sobre esos centros poblados, se usa un modelo de dispersión de contaminantes en el aire para estimar dichos niveles de contaminación y así, poder establecer el riesgo sobre la salud de población/trabajadores por la contaminación de PST y SO2. Este estudio permitió establecer que los niveles de SO2 por emisiones industriales han llegado a alcanzar valores considerados de riesgo para la salud de los pobladores/trabajadores, mientras los niveles de PST por emisiones industriales, salvo contadas excepciones, se mantienen en niveles considerados seguros para la salud.

Title: Golf Fontanals Authors: Mias Gifré, Josep

Title: Fundamental limits in the accuracy of wireless positioning Authors: Bacci, Giacomo; Closas Gómez, Pau; D'Amico, Antonio; Dardari, Davide; Fernandez Prades, Carles; Fontanella, Diana; Gezici, Sinan; Luise, Marco; Mallat, Achraf; Mengali, Umberto; Nájar Martón, Montserrat; Nicoli, Monica; Oestges, Claude; Vandendorpe, Luc

Title: Statistical properties of subgroups of free groups Authors: Bassino, Frederique; Martino, Armando; Nicaud, Cyril; Ventura Capell, Enric; Weil, Pascal Abstract: The usual way to investigate the statistical properties of finitely generated subgroups of free groups, and of finite presentations of groups, is based on the so-called word-based distribution: subgroups are generated (finite presentations are determined) by randomly chosen k -tuples of reduced words, whose maximal length is allowed to tend to infinity. In this paper we adopt a different, though equally natural point of view: we investigate the statistical properties of the same objects, but with respect to the so-called graph-based distribution, recently introduced by Bassino, Nicaud and Weil. Here, subgroups (and finite presentations) are determined by randomly chosen Stallings graphs whose number of vertices tends to infinity. Our results show that these two distributions behave quite differently from each other, shedding a new light on which properties of finitely generated subgroups can be considered frequent or rare. For example, we show that malnormal subgroups of a free group are negligible in the graph-based distribution, while they are exponentially generic in the word-based distribution. Quite surprisingly, a random finite presentation generically presents the trivial group in this new distribution, while in the classical one it is known to generically present an infinite hyperbolic group.

Title: Median graphs: a genetic approach based on new theoretical properties Authors: Ferrer Sumsi, Miquel; Valveny, Ernest; Serratosa Casanelles, Francesc Abstract: Given a set of graphs, the median graph has been theoretically presented as a useful concept to infer a representative of the set. However, the computation of the median graph is a highly complex task and its practical application has been very limited up to now. In this work we present two major contributions. On one side, and from a theoretical point of view, we show new theoretical properties of the median graph. On the other side, using these new properties, we present a new approximate algorithm based on the genetic search, that improves the computation of the median graph. Finally, we perform a set of experiments on real data, where none of the existing algorithms for the median graph computation could be applied up to now due to their computational complexity. With these results, we show how the concept of the median graph can be used in real applications and leaves the box of the only-theoretical concepts, demonstrating, from a practical point of view, that can be a useful tool to represent a set of graphs.

Title: Generalized median graph computation by means of graph embedding in vector spaces Authors: Ferrer Sumsi, Miquel; Valveny, Ernest; Serratosa Casanelles, Francesc; Riesen, Kaspar; Bunke, Horst Abstract: The median graph has been presented as a useful tool to represent a set of graphs. Nevertheless its computation is very complex and the existing algorithms are restricted to use limited amount of data. In this paper we propose a new approach for the computation of the median graph based on graph embedding. Graphs are embedded into a vector space and the median is computed in the vector domain. We have designed a procedure based on the weighted mean of a pair of graphs to go from the vector domain back to the graph domain in order to obtain a final approximation of the median graph. Experiments on three different databases containing large graphs show that we succeed to compute good approximations of the median graph. We have also applied the median graph to perform some basic classification tasks achieving reasonable good results. These experiments on real data open the door to the application of the median graph to a number of more complex machine learning algorithms where a representative of a set of graphs is needed.

Title: L'Emigració de Barcelona: Causes i característiques. El mercat de l'habitatge com a factor incentivador de l'emigració Authors: Garcia-Almirall, M. Pilar

Title: A model for CAGD using fuzzy logic Authors: Jacas Moral, Juan; Monreal Pujadas, Amadeo; Recasens Ferrés, Jorge Abstract: This paper presents a first approach to a system based on fuzzy logic for the design of curves and surfaces in the context of computer aided geometric design. Bézier curves and surfaces can be seen as particular cases of this system.

Title: Indistinguishability relations in Dempster-Shafer theory of evidence Authors: Hernandez, E; Recasens Ferrés, Jorge Abstract: Each theory or model implicitly defines its inherent notion of equality for the objects in question. In turn, this equality, and its counterpart, the mathematical concept of equivalence, provides the basis on which to establish classification mechanisms for the domain at hand.

Title: Carbonation of ternary building cementing materials Authors: Fernández Carrasco, Lucía; Torrens Martín, David; Martínez Ramírez, Sagrario Abstract: The carbonation processes of ettringite and calcium aluminate hydrates phases developed by hydration of calcium aluminate cement, fly ash and calcium sulphate ternary mixtures have been studied. The hydrated samples were submitted to 4% of CO2 in a carbonation chamber, and were analysed, previous carbonation and after 14 and 90 days of carbonation time, by infrared spectroscopy and X-ray diffraction; the developed morphology was performed with the 14 days carbonated samples. The results evidenced that ettringite reacts with CO2 after 14 days of exposition time and evolves totally at 90 days; the developed hydrated phases C3AH6 in samples with major CAC content, also reacts with CO2. Due to carbonation, calcium carbonate – mainly vaterite but also aragonite-, depending on the initial formulation, aluminium hydroxide and gypsum were detected.