Ontology selection: ontology evaluation on the real Semantic Web

The increasing number of ontologies on the Web and the appearance of large scale ontology repositories has brought the topic of ontology selection in the focus of the semantic web research agenda. Our view is that ontology evaluation is core to ontology selection and that, because ontology selection is performed in an open Web environment, it brings new challenges to ontology evaluation. Unfortunately, current research regards ontology selection and evaluation as two separate topics. Our goal in this paper is to explore how these two tasks relate. In particular, we are interested to get a better understanding of the ontology selection task and filter out the challenges that it brings to ontology evaluation. We discuss requirements posed by the open Web environment on ontology selection, we overview existing work on selection and point out future directions. Our major conclusion is that, even if selection methods still need further development, they have already brought novel approaches to ontology evaluatio

CAMBIO Y PERVIVENCIA DE LOS EMPLEOS MODALES DEL FUTURO EN DOS VARIEDADES CONTEMPORÁNEAS DEL ESPAÑOL NO ESTÁNDAR

International audienceSe comparan los empleos modales del futuro sintético (cantaré) y analítico (voy a cantar) en dos variedades contemporáneas de base española : el español "chicano" de Estados-Unidos y el judeo-español de Estambul, ambas variedades de contacto. Se describen los contextos sintácticos y los valores semánticos de ambas formas, poniéndose en evidencia diferencias entre ambas variedades que pueden relacionarse con la diferencia en las situaciones de contacto en que se desarrollan.Ce travail expose une comparaison du futur synthétique (cantaré) et analytique (voy a cantar) dans variétés contemporaines de base espagnole : le "chicano" (Etats-Unis) et le judéo-espagnol d'Istamboul. Il s'agit dans les deux cas de variétés issues dans des situations de contact de langues. Nous décrivons les contextes syntaxiques et les valeurs sémantiques des deux formes verbales. Les différences constatées entre les deux variétés sont mises en relation avec les diverses situations de contact dans lesquelles ces variétés se sont formées

Palabras de reinas, santas y alcahuetas: Modalización y representación del discurso femenino en la literatura medieval

International audienceSe propone en esta comunicación un estudio de la caracterización lingüística de los personajes femeninos en tres obras literarias de la Edad Media española: Sendebar, Poema de Santa Oria y el Libro de Buen Amor. Se estudia en ella cómo las actitudes y los comportamientos lingüísticos representados fundamentan una descripción del discurso, y en particular de su organización modal, que incluya la variable “sexo”.Cette communication propose une réflexion sur la caractérisation linguistique des personnages féminins dans trois textes littéraires du Moyen Âge espagnol: Sendebar, Poema de Santa Oria et Libro de Buen Amor. Elle explore les attitudes et les comportements linguistiques qui y sont représentés et la nécessité de prendre en compte la variable “sexe” pour la description du discours et, plus précisement, de son organisation modale

Spontaneous emergence of contrarian-like behaviour in an opinion spreading model

We introduce stochastic driving in the Sznajd model of opinion spreading. This stochastic effect is meant to mimic a social temperature, so that agents can take random decisions with a varying probability. We show that a stochastic driving has a tremendous impact on the system dynamics as a whole by inducing an order-disorder nonequilibrium phase transition. Interestingly, under certain conditions, this stochastic dynamics can spontaneously lead to agents in the system who are analogous to Galam's contarians.Comment: 4 eps figs, EuroPhys Lett styl

Integrated nano-plasmonics: reflecting a waveguide mode with a single nano-antenna

Integrated plasmonic systems have the potential to revolutionise telecom devices [1]. However, the large losses and poor efficiency of plasmonic systems [2] have limited the use of metallic systems as optical circuits. Here we present a hybrid silicon-metallic system in which a single nano-antenna embedded in a single-mode silicon waveguide acts as a tuneable and narrow-band switch. Nanoantennas interact very strongly with light [3], such that when the nano-antenna is at resonance with the waveguide mode up to 80% of the light is blocked by it. This drop in transmission is a consequence of scattering and interference between the dipole and the waveguide mode, which is efficient over the nano-rod resonance bandwidth. The high performance and simplicity of this hybrid device holds great promise for future optoelectronic circuits

Optimization of transport protocols with path-length constraints in complex networks

We propose a protocol optimization technique that is applicable to both weighted or unweighted graphs. Our aim is to explore by how much a small variation around the Shortest Path or Optimal Path protocols can enhance protocol performance. Such an optimization strategy can be necessary because even though some protocols can achieve very high traffic tolerance levels, this is commonly done by enlarging the path-lengths, which may jeopardize scalability. We use ideas borrowed from Extremal Optimization to guide our algorithm, which proves to be an effective technique. Our method exploits the degeneracy of the paths or their close-weight alternatives, which significantly improves the scalability of the protocols in comparison to Shortest Paths or Optimal Paths protocols, keeping at the same time almost intact the length or weight of the paths. This characteristic ensures that the optimized routing protocols are composed of paths that are quick to traverse, avoiding negative effects in data communication due to path-length increases that can become specially relevant when information losses are present.Comment: 8 pages, 8 figure