Scan for MARC: princípios sintáticos e semânticos de registros bibliográficos aplicados à conversão de dados analógicos para o formato MARC 21 bibliográfico

Pós-graduação em Ciência da Informação - FFC

Sintaxe e semântica de registros bibliográficos: princípios para a conversão de registros analógicos para o formato MARC21 bibliográfico: Scan for MARC

The research presents as its central theme the study of the bibliographic record conversion process. The object of study is framed by an understanding of analogic bibliographic record conversion to the Bibliograhpic MARC21 format, based on a syntactic and semantic analysis of records described according to descriptive metadata structure standards and content standards. The objective of this research the objective is to develop a theoretical-conceptual model of syntactic and semantic of bibliographic records, from Linguistic studies of Saussure and Hjelmslev of manifestations of human language, which subsidizes the development of a computacional interpreter, focused to the conversion of bibliographic records to MARC21 Bibliographic Format, which can be confirmed both the semantic value of the informational resource represented as the reliability of the representation. Given the aforementioned objectives, the methodological trajectory of the research is based on the qualitative approach, of an exploratory, descriptive and experimental nature, and with recourse to the literature. Contributions on the theoretical plane can be envisaged regarding the development of questions inherent to the syntactic and semantic aspects of bibliographic records, and by involving, at the same time, interdisciplinarity between Information Science, Computer Science and Linguistics. Contributions to the practical field are identified by the fact the study covers the development of the Scan for MARC, a computational interpreter that can be adopted by any institution that wishes to use the conversion procedure for bibliographic record databases to the MARC21 Bibliographic Format from description and visualization schemes of bibliographic records (AACR2r and ISBD), an aspect of the research which is considered innovative.

Conceptual design and simulation of a water Cherenkov muon veto for the XENON1T experiment

XENON is a dark matter direct detection project, consisting of a time projection chamber (TPC) filled with liquid xenon as detection medium. The construction of the next generation detector, XENON1T, is presently taking place at the Laboratori Nazionali del Gran Sasso (LNGS) in Italy. It aims at a sensitivity to spin-independent cross sections of 2 10-47 c 2 for WIMP masses around 50 GeV2, which requires a background reduction by two orders of magnitude compared to XENON100, the current generation detector. An active system that is able to tag muons and muon-induced backgrounds is critical for this goal. A water Cherenkov detector of ~ 10 m height and diameter has been therefore developed, equipped with 8 inch photomultipliers and cladded by a reflective foil. We present the design and optimization study for this detector, which has been carried out with a series of Monte Carlo simulations. The muon veto will reach very high detection efficiencies for muons (>99.5%) and showers of secondary particles from muon interactions in the rock (>70%). Similar efficiencies will be obtained for XENONnT, the upgrade of XENON1T, which will later improve the WIMP sensitivity by another order of magnitude. With the Cherenkov water shield studied here, the background from muon-induced neutrons in XENON1T is negligible.

Reforma de la NIC 37: un contraste conceptual de los nuevos desarrollos normativos sobre provisiones

El IASB tiene la intención de emitir una nueva Norma Internacional de Información Financiera que sustituirá la NIC 37, Provisiones, Activos Contingentes y Pasivos Contingentes, a cuyo efecto publicó en 2005 un borrador de modificación que marcó el inicio de un proceso de discusiones y elaboración de conclusiones provisionales que aún no ha concluido. Las dificultades, sobre todo de tipo conceptual, hacen complicado el logro de un modelo contable coherente y satisfactorio. Objetivos Esta tesis tiene dos objetivos principales: - Presentar una reflexión crítica de carácter conceptual sobre los desarrollos normativos protagonizados por el IASB en torno a los pasivos de naturaleza incierta. Así, la tesis aborda la identificación de las deficiencias e inconsistencias del proyecto de investigación del IASB, centrándose en el análisis de los documentos de trabajo de la reforma publicados y de los debates llevados a cabo en el seno del Consejo, así como de las críticas y comentarios suscitados a raíz de los procesos de consulta promovidos por el órgano regulador. - Construir un modelo contable que, aspirando a salvar las dificultades encontradas, permita reconocer y valorar los pasivos de carácter incierto, de tal modo que la información publicada en los estados financieros relativa a los mismos contribuya a facilitar a los inversores, tanto actuales como potenciales y en cuanto que proveedores de capital, la evaluación del riesgo y del rendimiento inherentes a sus inversiones. Con tales objetivos, la tesis comienza dando un esbozo de la contabilidad como instrumento orientado principalmente a servir en la toma de decisiones de los inversores. Después se ofrece una descripción de la norma vigente, para continuar, a medida que se tratan los distintos conceptos implicados, con un análisis crítico de dicha norma. Se exponen, también en el curso de ese estudio conceptual y con aún mayor detenimiento, las soluciones propuestas por el IASB durante el proceso de reforma, dándoles un tratamiento especialmente crítico en el que se pone el acento sobre todo en sus puntos débiles desde un punto de vista conceptual. Finalmente, se propone un modelo contable...

Conceptual Design of Monocolumn Production and Storage With Dry Tree Capability

A new concept and a preliminary study for a monocolumn floating unit are introduced, aimed at exploring and producing oil in ultradeep waters. This platform, which combines two relevant features-great oil storage capacity and dry tree production capability-comprises two bodies with relatively independent heave motions between them. A parametric model is used to define the main design characteristics of the floating units. A set of design alternatives is generated using this procedure. These solutions are evaluated in terms of stability requirements and dynamic response. A mathematical model is developed to estimate the first order heave and pitch motions of the platform. Experimental tests are carried out in order to calibrate this model. The response of each body alone is estimated numerically using the WAMIT (R) code. This paper also includes a preliminary study on the platform mooring system and appendages. The study of the heave plates presents the gain, in terms of decreasing the motions, achieved by the introduction of the appropriate appendages to the platform. [DOI: 10.1115/1.4001429]

Design, Science and Conceptual Analysis

Philosophers expend considerable effort on the analysis of concepts, but the value of such work is not widely appreciated. This paper principally analyses some arguments, beliefs, and presuppositions about the nature of design and the relations between design and science common in the literature to illustrate this point, and to contribute to the foundations of design theory.

Extracting ontological concepts for tendering conceptual structures

It has been argued that beyond software engineering and process engineering, ontological engineering is the third capability needed if successful e-commerce is to be realized. In our experience of building an ontological-based tendering system, we face the problem of building an ontology. In this paper, we demonstrate how to build ontologies in the tendering domain. The ontology life cycle is identified. Extracting concepts from existing resources like on-line catalogs is described. We have reused electronic data interchange (EDI) to build conceptual structures in the tendering domain. An algorithm to extract abstract ontological concepts from these structures is proposed.