43,418 research outputs found

    A Full Non-Monotonic Transition System for Unrestricted Non-Projective Parsing

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    Restricted non-monotonicity has been shown beneficial for the projective arc-eager dependency parser in previous research, as posterior decisions can repair mistakes made in previous states due to the lack of information. In this paper, we propose a novel, fully non-monotonic transition system based on the non-projective Covington algorithm. As a non-monotonic system requires exploration of erroneous actions during the training process, we develop several non-monotonic variants of the recently defined dynamic oracle for the Covington parser, based on tight approximations of the loss. Experiments on datasets from the CoNLL-X and CoNLL-XI shared tasks show that a non-monotonic dynamic oracle outperforms the monotonic version in the majority of languages.Comment: 11 pages. Accepted for publication at ACL 201

    Spanish Tourist Behaviour: A Specific Objective-base Segmantation

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    This work uses data from the Spanish Tourism Demand Segments Survey (N=6900) conducted by the IESA-CSIC for Turismo Andaluz, SA. The objective of the paper is to develop a statistical segmentation or typology of Spanish tourists based on objective aspects of tourist behaviour measured in the survey including destinations visited, theme of the trip, lodging, transportation and travel group. Initial categorical data are reduced using multiple correspondence analysis and grouped through cluster analysis. Afterwards, identified segments are evaluated to analyse their tourist profiles with a view to examining sociological perspectives of tourist behaviour.Tourist Demand, Segmentation, Spain, Domestic Tourism, Multiple Correspondence Analysis, Cluster Analysis

    Comunicación y discurso de prevención del cáncer de mama en el Estado de México

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    El presente trabajo está organizado por tópicos, partiendo desde las Ciencias Sociales y la Salud – Enfermedad (elementos teóricos), abordando y tratando la base teórica sobre la medicina preventiva, los factores que influyen en la aparición de enfermedades y el control médico de la salud del individuo, analizando como los factores de corte social y los biomédicos se interrelacionan en busca de respuestas y soluciones a las diferentes problemáticas que atañen a la salud pública

    New record of the sea anemone Kadosactis antarctica (Carlgren, 1928): re-description of an Antarctic deep-sea sea anemone, and a discussion of its generic and familial placement

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    Sagartiogeton antarcticus Carlgren, 1928 is an Antarctic deep-sea species of sea anemone only known from its holotype. The species has been assigned to the genera Sagartiogeton and Kadosactis, and is currently placed within the family Kadosactidae Riemann-Zu¨rneck, 1991. Kadosactis antarctica is re-described based on 11 specimens collected during the cruise of the R/V Polarstern ANT XIX/3 (ANDEEP-I) to the Scotia Sea and off the South Shetland Islands (Antarctica). The description includes a complete account of cnidae and photographs. Because the mesogloea is thickened on the aboral surface on the base of the tentacles, this feature becomes a generic character of Kadosactis rather than a differential specific character among the species of the genus as previously proposed. Furthermore, the known distribution of the species is enlarged to include the southern branch of the Scotia Sea

    Defensive alliances in graphs: a survey

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    A set SS of vertices of a graph GG is a defensive kk-alliance in GG if every vertex of SS has at least kk more neighbors inside of SS than outside. This is primarily an expository article surveying the principal known results on defensive alliances in graph. Its seven sections are: Introduction, Computational complexity and realizability, Defensive kk-alliance number, Boundary defensive kk-alliances, Defensive alliances in Cartesian product graphs, Partitioning a graph into defensive kk-alliances, and Defensive kk-alliance free sets.Comment: 25 page

    A new species of Hormathia (Actiniaria, Hormathiidae) from the eastern Weddell Sea, Antarctica

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    A new species of sea anemone in the genus Hormathia, is described and illustrated based on fortytwo specimens collected during the Polarstern cruises ANT XV/3 and ANT XVII/3 in the Weddell Sea. The main features of the new taxon are the crown of flattened and hooked tubercles at the distal end of the scapus, the regular arrangement of pointed tubercles along the column and the cnidom. The new species shares the pointed tubercles, at least in the upper part of the scapus, with two other species of Hormathia in the southern hemisphere: Hormathia spinosa Hertwig 1882 and H. pectinata Hertwig 188
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