9,711 research outputs found

    Cross-lingual Linking on the Multilingual Web of Data (position statement)

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    Recently, the Semantic Web has experienced signi�cant advancements in standards and techniques, as well as in the amount of semantic information available online. Even so, mechanisms are still needed to automatically reconcile semantic information when it is expressed in di�erent natural languages, so that access to Web information across language barriers can be improved. That requires developing techniques for discovering and representing cross-lingual links on the Web of Data. In this paper we explore the different dimensions of such a problem and reflect on possible avenues of research on that topic

    Using Cross-Lingual Explicit Semantic Analysis for Improving Ontology Translation

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    Semantic Web aims to allow machines to make inferences using the explicit conceptualisations contained in ontologies. By pointing to ontologies, Semantic Web-based applications are able to inter-operate and share common information easily. Nevertheless, multilingual semantic applications are still rare, owing to the fact that most online ontologies are monolingual in English. In order to solve this issue, techniques for ontology localisation and translation are needed. However, traditional machine translation is difficult to apply to ontologies, owing to the fact that ontology labels tend to be quite short in length and linguistically different from the free text paradigm. In this paper, we propose an approach to enhance machine translation of ontologies based on exploiting the well-structured concept descriptions contained in the ontology. In particular, our approach leverages the semantics contained in the ontology by using Cross Lingual Explicit Semantic Analysis (CLESA) for context-based disambiguation in phrase-based Statistical Machine Translation (SMT). The presented work is novel in the sense that application of CLESA in SMT has not been performed earlier to the best of our knowledge

    Dimensional reduction of the massless limit of the linearized "New Massive Gravity"

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    The so called "New Massive Gravity" in D=2+1D=2+1 consists of the Einstein-Hilbert action (with minus sign) plus a quadratic term in curvatures (KK-term). Here we perform the Kaluza-Klein dimensional reduction of the linearized KK-term to D=1+1D=1+1. We end up with a fourth-order massive electrodynamics in D=1+1D=1+1 described by a rank-2 tensor. Remarkably, there appears a local symmetry in D=1+1D=1+1 which persists even after gauging away the Stueckelberg fields of the dimensional reduction. It plays the role of a U(1)U(1) gauge symmetry. Although of higher-order in derivatives, the new 2D2D massive electrodynamics is ghost free, as we show here. It is shown, via master action, to be dual to the Maxwell-Proca theory with a scalar Stueckelberg field.Comment: 12 pages, one more reference and text slightly modified accordingl

    Bath Assisted Cooling of Spins

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    A suitable sequence of sharp pulses applied to a spin coupled to a bosonic bath can cool its state, i.e., increase its polarization or ground state occupation probability. Starting from an unpolarized state of the spin in equilibrium with the bath, one can reach very low temperatures or sizeable polarizations within a time shorter than the decoherence time. Both the bath and external fields are necessary for the effect which comes from the backreaction of the spin on the bath. This method can be applied to cool at once a disordered ensemble of spins. Since the bath is crucial for this mechanism, the cooling limits are set by the strength of its interaction with the spin(s).Comment: 4 pages. Accepted in PR

    Internal Space for the Noncommutative Geometry Standard Model and Strings

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    In this paper I discuss connections between the noncommutative geometry approach to the standard model on one side, and the internal space coming from strings on the other. The standard model in noncommutative geometry is described via the spectral action. I argue that an internal noncommutative manifold compactified at the renormalization scale, could give rise to the almost commutative geometry required by the spectral action. I then speculate how this could arise from the noncommutative geometry given by the vertex operators of a string theory.Comment: 1+22 pages. More typos and misprints correcte

    Pressure-induced phase transitions in AgClO4

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    AgClO4 has been studied under compression by x-ray diffraction and density functional theory calculations. Experimental evidence of a structural phase transition from the tetragonal structure of AgClO4 to an orthorhombic barite-type structure has been found at 5.1 GPa. The transition is supported by total-energy calculations. In addition, a second transition to a monoclinic structure is theoretically proposed to take place beyond 17 GPa. The equation of state of the different phases is reported as well as the calculated Raman-active phonons and their pressure evolution. Finally, we provide a description of all the structures of AgClO4 and discuss their relationships. The structures are also compared with those of AgCl in order to explain the structural sequence determined for AgClO4.Comment: 38 pages, 11 figures, 4 table

    Fasilitas Rehabilitasi Pasien Kanker di Batu

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    Fasilitas Rehabilitasi Pasien Kanker di Batu merupakan sebuah fasilitas yang bertujuan untuk membantu para survivor kanker agar dapat menjalani sisa hidupnya dengan lebih berkualitas, baik dalam sisi fisik maupun sisi psikologisnya. Suasana yang alami dan jauh dari perkotaan yang memiliki tekanan tinggi dapat mempercepat proses penyembuhan pasien. Oleh karena itu proyek ini terletak di kawasan perbukitan di kota Batu yang berkontur dan memiliki pemandangan indah. Pendekatan yang dipilih adalah Healing Architecture, dimana pendekatan ini menunjang tercapainya tujuan fasilitas, yaitu mengembalikan kondisi pasien ke keadaan seprima mungkin. Pendalaman yang dipilih adalah karakter ruang, dikarenakan karakter ruang memiliki pengaruh besar terhadap kondisi psikologis pasien. Dengan pemilihan pendalaman ini, diharapkan terciptanya suasana positif yang meningkatkan semangat hidup pasien dan mempercepat proses penyembuhan

    The Moyal Sphere

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    We construct a family of constant curvature metrics on the Moyal plane and compute the Gauss-Bonnet term for each of them. They arise from the conformal rescaling of the metric in the orthonormal frame approach. We find a particular solution, which corresponds to the Fubini-Study metric and which equips the Moyal algebra with the geometry of a noncommutative sphere.Comment: 16 pages, 3 figure
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