177,609 research outputs found
NONCOMPACTION OF THE LEFT VENTRICULAR MYOCARDIUM IN CHILDREN: CLINICAL AND PHYSIOPATHOLOGIC FEATURES
No full textFazio, G; Novo, S; Zito, R; Icona, MA; Marchì, S; Mongiovì, S; Gagliano, S; Pipitone,
Forum Civico della Città di Messina. Introduzione (A. Tulumello). Analisi socio-economica (R. Foderà, V. Pipitone, A. Tulumello)
No full textCognitive Linguistics as the Underlying Framework for Semantic Annotation
No full textIn recent years many attempts have been made to design suitable sets of rules aimed at extracting the semantic meaning from plain text, and to achieve annotation, but very few approaches make extensive use of grammars. Current systems are mainly focused on extracting the semantic role of the entities described in the text. This approach has limitations: in such applications the semantic role is conceived merely as the meaning of the involved entities without considering their context. As an example, current semantic annotators often specify a date entity without any annotation regarding the kind of the date itself i.e. a birth date, a book publication date, and so on. Moreover, these systems use ontologies that have been developed specifically for the system’s purposes and have reduced portability. Extensive use of both linguistic resources and semantic representations of the domain are needed in this scenario; the semantic representation of the domain addresses the semantic interpretation of the con- text, while NLP tools can help to solve some linguistic problems related to the semantic annotation, as synonymy, ambiguities, and co-references.
A novel framework inspired to Cognitive Linguistics theories is proposed in this work that is aimed at facing the problem outlined above. In particular, our work is based on Construction Grammar (CxG). CxG defines a ”construction” as a form- meaning couple. We use RDF triples in the domain ontology as the ”semantic seeds” to build constructions. A suitable set of rules based on linguistic typology have been designed to infer semantics and syntax from the semantic seed, while combining them as the poles of constructions. A hierarchy of rules to infer syntactic patterns for either single words or sentences using WordNet and FrameNet has been designed to overcome the limitations when expressing the syntactic poles using solely the terms stated in the ontology. As a consequence, semantic annotation of plain text is achieved by computing all possible syntactic forms for the same meaning during the analysis of document corpora.
The proposed framework has been finalized to semantic annota- tion of Wikipedia pages; the result is a system for automatic gen- eration of SemanticWeb wiki contents from standard Wikipedia pages, leading to a possible solution of the big challenge to make existing wiki sources semantic wikis
La misura dello sviluppo locale
No full textNegli anni ''90 lo sviluppo locale diventa modello per lo sviluppo delle aree depresse. I sistemi locali del lavoro, strumento costruito per identificare lo sviluppo locale forte dei distretti industriali della "terza Italia" non sono adeguati per leggere i fenomeni di sviluppo deboli e iniziali del Mezzogiorno degli anni ''90. Il volume affronta il problema di identificare e costruire strumenti di misura dello sviluppo locale adeguati ai processi iniziali e deboli di dinamismo economico e di sviluppo, a partire da una definizione adeguata del concetto di sviluppo locale. L''analisi dei PIT nella regione siciliana fa da riferimento empirico
VEBO: Validation of E-R diagrams through ontologies and WordNet
No full textIn the semantic web vision, ontologies are building blocks for providing applications with a high level description of the operating environment in support of interoperability and semantic capabilities. The importance of ontologies in this respect is clearly stated in many works. Another crucial issue to increase the semantic aspect of web is to enrich the level of expressivity of database related data. Nowadays, databases are the primary source of information for dynamical web sites. The linguistic data used to build the database structure could be relevant for extracting meaningful information. In most cases, this type of information is not used for information retrieval. The work presented in this paper deals with an attempt to enrich a database structure using linguistic information. The purpose is twofold: the proposed approach can be used either to validate the database structure linguistically or at least to enrich information retrieval with structural information. In this paper the first goal is pursued by the construction of the VEBO system that is used to validate database entity-relation diagrams through semi-automatic creation and enrichment of ontology
ISOLATED STERNOCLAVICULAR JOINT ARTHRITIS IN HEROIN ADDICTS AND/OR HIV POSITIVE PATIENTS: THREE CASES
No full textCorrelation between the single nucleotide polymorphism (SNP) rs4374383 in MERTK gene with the risk of development and progression of liver disease
No full textAppropriate Similarity Measures for Author Cocitation Analysis
No full textWe provide a number of new insights into the methodological discussion about author cocitation analysis. We first argue that the use of the Pearson correlation for measuring the similarity between authors’ cocitation profiles is not very satisfactory. We then discuss what kind of similarity measures may be used as an alternative to the Pearson correlation. We consider three similarity measures in particular. One is the well-known cosine. The other two similarity measures have not been used before in the bibliometric literature. Finally, we show by means of an example that our findings have a high practical relevance.information science;Pearson correlation;cosine;similarity measure;author cocitation analysis
Imprese che esportano e imprese che vorrebbero esportare: un confronto
No full textSulla base di un'indagine diretta presso un campione rappresentativo di imprese esportatrici e non esportatrici, si procede a una stima dei differenziali di produttività e a un confronto relativo a variabili economiche e relazioni fra imprese esportatrici, imprese non esportatrici e imprese potenzialmente esportatric
Influence of temperature and period of freezing on the generation of hemolysate and blood cell lysate.
No full textBackground: There is little information on temperature and period of freezing for generating hemolysate and blood cell lysate. Materials and methods: Primary tubes containing whole blood were frozen at -20 °C and -80 °C and then serially thawed to assess cell lysis and clinical chemistry tests in centrifuged plasma. Results and conclusions: Massive amount of blood cells lysis could only be obtained by storing samples 12 h at -20 °C, or 2 h at -80 °C. © 2011 The Canadian Society of Clinical Chemists
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