Dise��o cooperativo de un sistema de comunicaciones por sat��lite basado en diversidad espacial

En este proyecto se han presentado los modelos de distribuci��n de canal m��s comunes que se puede encontrar una se��al en una transmisi��n. Seguidamente se ha presentado el concepto de diversidad en comunicaciones inal��mbricas terrestres y se ha trasladado el escenario a comunicaciones por sat��lite. Para analizar la calidad de los enlaces con diversidad se ha realizado un simulador, con Matlab, que modele la estructura b��sica de un sistema de comunicaciones (emisor, canal y receptor). Simulando las comunicaciones entre los diferentes sistemas de diversidad se ha podido comparar la calidad de cada enlace. El modelo Alamouti ha presentado una robustez y una baja probabilidad de error que hacen que sea la mejor elecci��n a la hora de dise��ar un sistema de diversidad para comunicaciones por sat��lite. Utiliza la diversidad de canal para aprovechar cada pizca de se��al que recibe y as�� poder descifrar el mensaje enviado.

An��lisi de la situaci�� actual del llop (Canis lupus) a Catalunya i valoraci�� socioambiental de la seva pres��ncia

En el present treball, en primer lloc, s���ha analitzat l���escenari actual en refer��ncia a la tornada del llop (Canis lupus) a Catalunya i s���han avaluat les mesures gesti�� que s���estan duent a terme al respecte, tot identificant els seus punts forts i els seus punts d��bils. D���aquesta manera, s���ha pogut saber que la poblaci�� de llops actual ��s petita i poc estable, i es mou per la zona del Parc Natural del Cad��-Moixer�� i els seus voltants, on s���estan efectuant les tasques de control i seguiment de l���esp��cie. No obstant, la seva evoluci�� ha anat a l���al��a durant els darrers anys, i es preveu que pugui colonitzar noves ��rees a curt-mig termini, pel que aviat s���hauria d���ampliar l�����mbit d���aplicaci�� d���aquesta gesti��. Posteriorment, s���ha realitzat una valoraci�� de la seva pres��ncia a Catalunya -encabida dins d���un marc hipot��tic- per determinar l���ampli ventall d���aspectes socials i ambientals que envolten aquest fet. Mitjan��ant aquesta valoraci�� s���han pogut detectar les principals mancances que presenta el pa��s per fer front a aquesta situaci��, per�� tamb�� s���han identificat les fortaleses i les oportunitats que es presenten de cara al futur.

Exome sequencing extends the phenotypic spectrum for ABHD12 mutations: from syndromic to nonsyndromic retinal degeneration.

OBJECTIVE: To identify the genetic causes underlying autosomal recessive retinitis pigmentosa (arRP) and to describe the associated phenotype. DESIGN: Case series. PARTICIPANTS: Three hundred forty-seven unrelated families affected by arRP and 33 unrelated families affected by retinitis pigmentosa (RP) plus noncongenital and progressive hearing loss, ataxia, or both, respectively. METHODS: A whole exome sequencing (WES) analysis was performed in 2 families segregating arRP. A mutational screening was performed in 378 additional unrelated families for the exon-intron boundaries of the ABHD12 gene. To establish a genotype-phenotype correlation, individuals who were homozygous or compound heterozygotes of mutations in ABHD12 underwent exhaustive clinical examinations by ophthalmologists, neurologists, and otologists. MAIN OUTCOME MEASURES: DNA sequence variants, best-corrected visual acuity, visual field assessments, electroretinogram responses, magnetic resonance imaging, and audiography. RESULTS: After a WES analysis, we identified 4 new mutations (p.Arg107Glufs*8, p.Trp159*, p.Arg186Pro, and p.Thr202Ile) in ABHD12 in 2 families (RP-1292 and W08-1833) previously diagnosed with nonsyndromic arRP, which cosegregated with the disease among the family members. Another homozygous mutation (p.His372Gln) was detected in 1 affected individual (RP-1487) from a cohort of 378 unrelated arRP and syndromic RP patients. After exhaustive clinical examinations by neurologists and otologists, the 4 affected members of the RP-1292 had no polyneuropathy or ataxia, and the sensorineural hearing loss and cataract were attributed to age or the normal course of the RP, whereas the affected members of the families W08-1833 and RP-1487 showed clearly symptoms associated with polyneuropathy, hearing loss, cerebellar ataxia, RP, and early-onset cataract (PHARC) syndrome. CONCLUSIONS: Null mutations in the ABHD12 gene lead to PHARC syndrome, a neurodegenerative disease including polyneuropathy, hearing loss, cerebellar ataxia, RP, and early-onset cataract. Our study allowed us to��report 5 new mutations in ABHD12. This is the first time missense mutations have been described for this gene. Furthermore, these findings are expanding the spectrum of phenotypes associated with ABHD12 mutations ranging from PHARC syndrome to a nonsyndromic form of retinal degeneration.

Sistema d'Informaci�� Geogr��fica Arqueol��gica: SigArq. Versi�� 1.1

Aquest projecte ��s la continuaci�� del projecte ���Sistema de Informaci��n Geogr��fico Arqueol��gico: SigArq. Construcci��n de herramientas inform��ticas para la gesti��n arqueol��gica���, desenvolupat per Pablo del Fresno Bernal, membre del ���Equipo de Investigaci��n Arqueol��gico Graccurris���. El SigArq 1.1 ��s la segona versi�� d'aquesta aplicaci�� inform��tica de gesti�� arqueol��gica. L'objectiu principal d'aquesta versi�� ��s el de permetre l'inventari i l'actualitzaci�� de la informaci�� (cartogr��fica i alfanum��rica) dels elements necessaris per la gesti�� arqueol��gica.

The Commons and anti-commons problems in the tourism economy

Countries specialised in tourism tend to face two problems with contradictory effects: the commons and the anti-commons, which lead to tourism over- and under-production, respectively. This paper develops a two-period model to analyse the joint effects of both problems on a small and remote tourism economy. Congestion and the complementariness between foreign transport and local tourism services are key features in this type of markets. As a result, direct selling and the presence of foreign tour-operators emerge as possible market arrangements with different implications in terms of welfare and public intervention. Four main results are obtained. First, in the direct selling situation the optimal policy depends on the relative importance of the problems. Second, the existence of tour-operators always leads to tourism over-production. Third, the presence of a single tour-operator does not solve the congestion problem. Lastly, the switch from several tour-operators to a single one is welfare reducing.

Comparable Survival Between HIV+ and HIV- non-Hodgkin and Hodgkin Lymphoma Patients Undergoing Autologous Peripheral Blood Stem Cell Transplantation.

Autologous stem cell transplantation (ASCT) has been successfully used in HIV-related lymphoma (HIV-Ly) patients on highly active antiretroviral therapy. We report the first comparative analysis between HIV-Ly and a matched cohort of HIV(-) lymphoma patients. This retrospective European Group for Blood and Marrow Transplantation study included 53 patients (66% non-Hodgkin and 34% Hodgkin lymphoma) within each cohort. Both groups were comparable except for the higher proportion of males, mixed-cellularity Hodgkin lymphoma and patients receiving granulocyte colony-stimulating factor before engraftment and a smaller proportion receiving total body irradiation-based conditioning within the HIV-Ly cohort. Incidence of relapse, overall survival, and progression-free survival were similar in both cohorts. A higher nonrelapse mortality within the first year after ASCT was observed in the HIV-Ly group (8% vs 2%), predominantly because of early bacterial infections, although this was not statistically significant and did not influence survival. Thus, within the highly active antiretroviral therapy era, HIV patients should be considered for ASCT according to the same criteria adopted for HIV(-) lymphoma patients.

Agents m��bils en situacions d'emerg��ncia: mobilitat d'etiquetes de triatge

En les actuacions de rescat en emerg��ncies amb un gran nombre de v��ctimes, una de les primeres tasques a realitzar pels serveis sanitaris ��s la de triar-les en funci�� del seu estat i la urg��ncia amb que han de ser tractades. En el grup SeNDA es treballa en un sistema d���agents m��bils que automatitza el mecanisme manual de triatge, fent ��s de dispositius electr��nics i una xarxa MANET com a canal de comunicaci��. En aquest projecte es proposa un sistema de gesti�� de mobilitat pels agents que transporten dades de v��ctimes fins al centre de coordinaci��, juntament amb un mecanisme de control d���aquests agents totalment transparent a l���usuari.

Some Considerations Concerning Regulation and Competition in the Port Sector

The aim of this paper is to discuss the circumstances in which the process of competition between ports takes place in Spain ��� circumstances arising from the way the port system is currently set up and from the regulations governing it. The importance of this matter lies both in the fact that intensified competition between ports is the way to set about boosting the efficiency of the Spanish port sector and in the relevance of this business to the economies of the regions in which the ports are located. It is precisely for this reason that the reform instituted in 1992 aimed to combine balanced development of the national port system with the defence of the interests of autonomous regions. To this end the current regulatory framework provides for the possibility of port authorities drawing up their own competitive strategies, but makes their implementation conditional upon approval of their business plan by the Spanish state port authority. The latter body coordinates the national port system to ensure the guidelines set by the central government authorities are followed in the field of transport. However, the scale of the differences which exist among both the size of facilities and their relevant markets on the one hand, and the financial and economic circumstances of each of them on the other, suggest that each port authority's needs must be very different. Consequently, their competitive strategies must also be very different. It is therefore valid to ask whether coping with this diversity calls for different guidelines to regulate their freedom of action. Key words: Competition, regulation, port sector JEL classification numbers: L1, L5, L9

A critical analysis of dimensions and curve fitting practice in economics

When dealing with sustainability we are concerned with the biophysical as well as the monetary aspects of economic and ecological interactions. This multidimensional approach requires that special attention is given to dimensional issues in relation to curve fitting practice in economics. Unfortunately, many empirical and theoretical studies in economics, as well as in ecological economics, apply dimensional numbers in exponential or logarithmic functions. We show that it is an analytical error to put a dimensional unit x into exponential functions ( a x ) and logarithmic functions ( x a log ). Secondly, we investigate the conditions of data sets under which a particular logarithmic specification is superior to the usual regression specification. This analysis shows that logarithmic specification superiority in terms of least square norm is heavily dependent on the available data set. The last section deals with economists��� ���curve fitting fetishism���. We propose that a distinction be made between curve fitting over past observations and the development of a theoretical or empirical law capable of maintaining its fitting power for any future observations. Finally we conclude this paper with several epistemological issues in relation to dimensions and curve fitting practice in economics

Dise��o de filtros transversales mediante el h��brido de 90��

Los filtros de microondas son uno de los elementos clave en el dise��o de la mayor��a de sistemas de RF que soportan servicios de telecomunicaciones modernos. Algunas de las aplicaciones actuales son, por ejemplo, los nuevos sistemas radar de banda ultra ancha (UWB ��� Ultra Wide Band) y sistemas de transmisi��n de servicios multimedia, donde se requieren dimensiones peque��as del circuito, bajas p��rdidas de inserci��n y una alta selectividad. Una de las tendencias que ha surgido como alternativa a las teor��as cl��sicas de dise��o de filtros, es el dise��o de filtros basados en t��cnicas de se��ales interferentes, conocidos como filtros transversales. En esta memoria es muestra como dise��ar un filtro transversal mediante el H��brido de 90�� y mediante el H��brido de 90�� con l��neas acopladas, planteando 3 posibles soluciones de la ubicaci��n de las l��neas acopladas.

Planta de producci�� de paracetamol

L���objectiu d���aquest projecte es basa en el disseny d���una planta qu��mica en la qual es dur�� a terme la producci�� del paracetamol a partir de la nitraci�� del fenol. Per a realitzar aquest projecte s���haur�� de tenir en compte que la planta compleixi les normatives i legislacions vigents. Aquest projecte inclou els c��lculs realitzats per a obtenir el disseny dels equips necessaris per a dur a terme el proc��s, els diagrames corresponents al proc��s com ara pl��nols d���enginyeria, implantaci��, etc., la posada en marxa de la planta i d���altres especificacions necess��ries per a poder tenir una visi�� m��s acurada del proc��s de construcci�� per a una planta qu��mica d���aquestes caracter��stiques.

Exponentially small splitting of separatrices in the perturbed McMillan map

The McMillan map is a one-parameter family of integrable symplectic maps of the plane, for which the origin is a hyperbolic fixed point with a homoclinic loop, with small Lyapunov exponent when the parameter is small. We consider a perturbation of the McMillan map for which we show that the loop breaks in two invariant curves which are exponentially close one to the other and which intersect transversely along two primary homoclinic orbits. We compute the asymptotic expansion of several quantities related to the splitting, namely the Lazutkin invariant and the area of the lobe between two consecutive primary homoclinic points. Complex matching techniques are in the core of this work. The coefficients involved in the expansion have a resurgent origin, as shown in [MSS08].

Resurgence of inner solutions for perturbations of the McMillan map

A sequence of ���inner equations��� attached to certain perturbations of the McMillan map was considered in [MSS09], their solutions were used in that article to measure an exponentially small separatrix splitting. We prove here all the results relative to these equations which are necessary to complete the proof of the main result of [MSS09]. The present work relies on ideas from resurgence theory: we describe the formal solutions, study the analyticity of their Borel transforms and use ��Ecalle���s alien derivations to measure the discrepancy between different Borel-Laplace sums.