Una infraestructura de metadades bibliogràfiques pel segle XXI

Aquest article tracta l'actual infraestructura bibliogràfica de les biblioteques que va ser creada en els inicis dels ordinadors – abans de la Web, XML, i de la varietat d'altres avenços tecnològics que en l'actualitat ofereixen noves oportunitats. Per una banda, s'identifiquen els requisits generals d'una infraestructura de metadades moderna per a les biblioteques incloent qualitats com: versatilitat, extensibilitat, granularitat i accessibilitat. Per l'altra banda, es proposa un nou tipus d'infraestructura de metadades que mostra, com a mínim, alguna d'aquestes qualitats. S'han identificat alguns temes clau que caldrà superar per tal d'implementar un canvi d'aquesta magnitud.

Diseño, Desarrollo e Implementación de una aplicación WEB-MAP para la visualización y consulta de los proyectos ejecutados por AudingIntraesa

Consiste en el desarrollo de una aplicación WEB-MAP para la visualización y consulta de los proyectos ejecutados por AudingIntraesa. La tecnología utilizada fue MySQL como sistema de gestión de bases de datos, HTTP Apache como servidor web y Adobe Flex como entorno de desarrollo. Se creó una base de datos. Se diseñó una interfaz de usuario intuitiva, eficiente y atractiva. Se desarrollaron rutinas en AS3 para dotar de funcionalidades a la aplicación. Incluyen la consulta y actualización en tiempo de ejecución, descarga de ficheros externos, la fácil navegación por el mapa con capacidades de zoom, pan, cambio de mapas.

Crisis matrimoniales y su prevención

Les crisis sobrevenen en tota unió matrimonial. És necessari diferenciar entre crisis funcionals o fisiològiques i crisi patològiques. Les primeres son pròpies de la vida conjugal i es produiran a qualsevol matrimoni, formant part de la seva evolució madurativa, i les segones només tindran lloc en alguns matrimonis causant problemes més greus. Ambdues crisis requereixen d’estratègies de resolució de problemes, perquè el cònjuges puguin superar-les conjuntament, encara que en las segones habitualment es necessari d’intervenció terapèutica per poder-les superar. A través d’aquest treball es pretén explicar les crisis matrimonials i la seva prevenció.

Constraint algorithm for k-presymplectic Hamiltonian systems. Application to singular field theories

The k-symplectic formulation of field theories is especially simple, since only tangent and cotangent bundles are needed in its description. Its defining elements show a close relationship with those in the symplectic formulation of mechanics. It will be shown that this relationship also stands in the presymplectic case. In a natural way,one can mimick the presymplectic constraint algorithm to obtain a constraint algorithmthat can be applied to k-presymplectic field theory, and more particularly to the Lagrangian and Hamiltonian formulations offield theories defined by a singular Lagrangian, as well as to the unified Lagrangian-Hamiltonian formalism (Skinner--Rusk formalism) for k-presymplectic field theory. Two examples of application of the algorithm are also analyzed.

The European Union Perception of Cuba: From Frustation to Irritation

On Friday May 16, the Ministry of Foreign Affairs of Cuba summoned the newly-appointed charged’affairs of the European Commission in Havana and announced the withdrawal of the application procedure for membership in the Cotonou Agreement of the Africa, Caribbean, and Pacific (ACP) countries, and in fact renouncing to benefit from European development aid.1 In a blistering note published in the Granma official newspaper of the Cuban Communist Party, the government blamed the EU Commission for exerting undue pressure, its alleged alignment with the policies of the United States, and censure for the measures taken by Cuba during the previous weeks.2 In reality, Cuba avoided an embarrasin flat rejection for its application. This was the anti-climatic ending for a long process that can be traced back to the end of the Cold War, in a context where Cuba has been testing alternative grounds to substitute for the overwhelming protection of the Soviet Union

España ante la opinión pública de los Estados Unidos: ¿del aislamiento y la indiferencia a la influencia y la fascinación?

La inmensa mayoría de los estadounidenses no ha prestado apenas atención al decidido apoyo del gobierno español a la política de los Estados Unidos frente a Irak. La persistente presencia del nombre del presidente del gobierno español en los despachos de prensa y en los telediarios, y la mención del status de España como miembro del Consejo de Seguridad de la ONU, contrastaron con la carencia de profundidad de comentarios al respecto, apenas paliada por un número reducido de entrevistas. Esta práctica unanimidad antes de la apertura de las hostilidades, se vio confirmada con mayor contundencia cuando comenzó la guerra, al constatarse la carencia de medios militares con los que España pudiera respaldar su apoyo político. A la espera de lo que en su momento digan los especialistas académicos (por otra parte también ausentes en los urgentes análisis de los ‘think-tanks’ norteamericanos), el vacío de análisis sobre la estrategia española, sus riesgos, o sus posibles beneficios, es, por lo tanto, clamoroso. De momento, tampoco se puede detectar una actitud crítica (como tenuemente puede constatarse en ciertos medios europeos) hacia las motivaciones españolas en los medios de comunicación norteamericanos que se han mostrado opuestos, con editoriales o con comentarios individuales, a la estrategia del presidente Bush.1 Por otra parte, la atención de la opinión pública parece estar más obsesionada por lo que se interpreta como despecho francés que por la contribución española. Puestos a elegir, se puede prever que los comentaristas pro Bush elegirían castigar a Francia que premiar a España.

Estudi d’Azolla filiculoides al riu Ter

Estudi de la distribució del pteridòfit invasor Azolla filiculoides al tram mitjà-baix del riu Ter, entre El Pasteral i la seva desembocadura, anàlisi dels factors ambientals que afecten el seu creixement i descripció del cicle biològic. Es proposen diverses pautes per a la seva gestió

GENCODE: producing a reference annotation for ENCODE

Background: The GENCODE consortium was formed to identify and map all protein-coding genes within the ENCODE regions. This was achieved by a combination of initial manualannotation by the HAVANA team, experimental validation by the GENCODE consortium and a refinement of the annotation based on these experimental results.Results: The GENCODE gene features are divided into eight different categories of which onlythe first two (known and novel coding sequence) are confidently predicted to be protein-codinggenes. 5’ rapid amplification of cDNA ends (RACE) and RT-PCR were used to experimentallyverify the initial annotation. Of the 420 coding loci tested, 229 RACE products have beensequenced. They supported 5’ extensions of 30 loci and new splice variants in 50 loci. In addition,46 loci without evidence for a coding sequence were validated, consisting of 31 novel and 15putative transcripts. We assessed the comprehensiveness of the GENCODE annotation byattempting to validate all the predicted exon boundaries outside the GENCODE annotation. Outof 1,215 tested in a subset of the ENCODE regions, 14 novel exon pairs were validated, only twoof them in intergenic regions.Conclusions: In total, 487 loci, of which 434 are coding, have been annotated as part of theGENCODE reference set available from the UCSC browser. Comparison of GENCODEannotation with RefSeq and ENSEMBL show only 40% of GENCODE exons are contained withinthe two sets, which is a reflection of the high number of alternative splice forms with uniqueexons annotated. Over 50% of coding loci have been experimentally verified by 5’ RACE forEGASP and the GENCODE collaboration is continuing to refine its annotation of 1% humangenome with the aid of experimental validation.

Unified formalism for non-autonomous mechanical systems

We present a unified geometric framework for describing both the Lagrangian and Hamiltonian formalisms of regular and non-regular time-dependent mechanical systems, which is based on the approach of Skinner and Rusk (1983). The dynamical equations of motion and their compatibility and consistency are carefully studied, making clear that all the characteristics of the Lagrangian and the Hamiltonian formalisms are recovered in this formulation. As an example, it is studied a semidiscretization of the nonlinear wave equation proving the applicability of the proposed formalism.

Missatges autoreferencials dels actors del ritual de l'Id-al-ad·ha

L'article analitza la celebració de l'Id-al-ad·ha o "festa del sacrifici", ritual protagonitzat per la comunitat de musulmans el desè dia del mes de dhu-al-hijja. Es parteix d'exemples etnogràfics procedents del context de la diàspora musulmana al Tarragonès i de la societat emiral mauritana. El fenomen s'analitza des dels rols que els actors exerceixen en el ritual. L'argumentació vol subratllar la idea que tot ritual s'inscriu en un context social específic del qual n'és producte alhora que modulador, per mitjà del que Roy Rappaport anomena "missatges autoreferencials". Això no exclou l'existència d'un conjunt de denominadors comuns o "missatges canònics" entre les diverses pràctiques rituals referides.

Equivalence Between the Lagrangian and Hamiltonian Formalisms for Constrained Systems

The equivalence between the Lagrangian and Hamiltonian formalism is studied for constraint systems. A procedure to construct the Lagrangian constraints from the Hamiltonian constraints is given. Those Hamiltonian constraints that are first class with respect to the Hamiltonian constraints produce Lagrangian constraints that are FL-projectable.

Lee HWA Chung theorem for presympectic manifolds. Canonical transformations for constrained systems

We generalize the analogous of Lee Hwa Chungs theorem to the case of presymplectic manifolds. As an application, we study the canonical transformations of a canonical system (M, S, O). The role of Dirac brackets as a test of canonicity is clarified.

Canonical transformations theory for presymplectic systems

We develop a theory of canonical transformations for presymplectic systems, reducing this concept to that of canonical transformations for regular coisotropic canonical systems. In this way we can also link these with the usual canonical transformations for the symplectic reduced phase space. Furthermore, the concept of a generating function arises in a natural way as well as that of gauge group.

Higher order Lagrangian systems: Geometric structures, Dynamics, and Constraints

In order to study the connections between Lagrangian and Hamiltonian formalisms constructed from aperhaps singularhigher-order Lagrangian, some geometric structures are constructed. Intermediate spaces between those of Lagrangian and Hamiltonian formalisms, partial Ostrogradskiis transformations and unambiguous evolution operators connecting these spaces are intrinsically defined, and some of their properties studied. Equations of motion, constraints, and arbitrary functions of Lagrangian and Hamiltonian formalisms are thoroughly studied. In particular, all the Lagrangian constraints are obtained from the Hamiltonian ones. Once the gauge transformations are taken into account, the true number of degrees of freedom is obtained, both in the Lagrangian and Hamiltonian formalisms, and also in all the intermediate formalisms herein defined.