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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
1

Οργανικά συστήματα αρχείων

Πασιόπουλος, Ανδρέας 04 December 2012 (has links)
Με αυτή την εργασία προτείνουμε και υποστηρίζουμε ένα νέο πρότυπο για τα συστήματα αρχείων νέας γενιάς. Σε αυτό το πρότυπο, η παραδοσιακή άποψη ενός αρχείου αντικαθίσταται από την έννοια της πληροφοριακής μονάδας (information unit) και η παραδοσιακή αντίληψη των ιεραρχικών συστημάτων αρχείων αντικαθίσταται από ένα συνεχώς εξελισσόμενο χώρο δυναμικά αλληλένδετων πληροφοριακών μονάδων. Ένα Οργανικό Σύστημα Αρχείων (OFS) ορίζεται ως ένα σύστημα το οποίο αναπτύσσεται φυσικά και δεν υπόκειται σε τεχνητούς κανόνες και προκαθορισμένους, στατικούς τρόπους προβολής προς τους χρήστες του. Στο επίκεντρο του OFS βρίσκονται νέες αφαιρέσεις που υποστηρίζουν ένα συνεχώς εξελισσόμενο σύνολο πληροφοριακών μονάδων, χαρακτηρισμών των χρηστών για αυτές, και σχέσεων που δημιουργούνται μεταξύ τους από την πρόσβαση των χρηστών σε αυτές. Οι αφαιρέσεις αυτές επιτρέπουν το ίδιο σύστημα και το περιεχόμενό του να είναι ορατό με διαφορετικό τρόπο από διαφορετικούς τύπους χρηστών, σύμφωνα με τις τρέχουσες πληροφοριακές τους ανάγκες. Το OFS είναι ανθρωποκεντρικό, καθώς απαιτείται ανθρώπινη συνεισφορά για το χαρακτηρισμό των πληροφοριακών μονάδων και για την ανακάλυψη και το σχολιασμό των μεταξύ τους σχέσεων. Δεδομένου αυτού, στην καρδιά του OFS βρίσκονται αλγόριθμοι για την αναζήτηση βάσει περιεχομένου στα αποθηκευμένα αρχεία. Στην εργασία αυτή εκθέτουμε τα αποτελέσματα της μέχρι τώρα έρευνάς μας, συμπεριλαμβανομένης μιας υλοποίησης σε επίπεδο πυρήνα του λειτουργικού συστήματος, των βασικών χαρακτηριστικών του OFS, καθώς και τις σχετικές μετρήσεις απόδοσης προς απόδειξη της βιωσιμότητας της προσέγγισής μας. Συζητάμε στη συνέχεια, τις προκλήσεις που παραμένουν και τον αντίκτυπο που μπορεί να έχει το OFS στις σχετικές προσπάθειες έρευνας και ανάπτυξης, επισημαίνοντας τη σχετική έρευνα από άλλους τομείς, όπως η Ανάκτηση Πληροφορίας, το Κοινωνικό Λογισμικό, οι Διεπαφές Χρηστών, και η Διαχείριση Δεδομένων. / We propose and advocate a new paradigm for the next-generation file systems. In it, the traditional view of a file is replaced by the notion of an information unit and the traditional notion of hierarchical filesystems is replaced by an ever-evolving space of dynamically inter-related information units. An Organic File System (OFS) is defined as a system, which develops naturally and which does not conform to artificial rules and predefined, static ways of being viewed by its users. At the core of OFS lie novel abstractions which support a continuously evolving set of information units, users' characterizations of them, and relationships established between them by users accessing them. The abstractional also facilitate the same system and its contents to be viewed differently by different types of users, based on the current information needs. OFS is human-centered, as human input is used to characterize information units and to discover and annotate relationships between units. Given this, at the heart of OFS lie algorithms for content-based search of stored files. We report our R&D efforts so far, including a kernel-level architecture and implementation of the basic features of OFS and relevant performance measures establishing the viability of our approach. We then discuss the large number of challenges that remain and the impact OFS can have in relevant R\&D efforts, highlighting relevant research from other fields, such as Information Retrieval, Social Software, User Interfaces, and Data Management.
2

Diálogos sobre preservação documental e ciência da informação.

Silva, Ismaelly Batista dos Santos 22 March 2016 (has links)
Submitted by Morgana Silva (morgana_linhares@yahoo.com.br) on 2016-06-22T16:17:29Z No. of bitstreams: 1 arquivototal.pdf: 524648 bytes, checksum: c6093c49082a4ebf69a84a2713a060a7 (MD5) / Made available in DSpace on 2016-06-22T16:17:30Z (GMT). No. of bitstreams: 1 arquivototal.pdf: 524648 bytes, checksum: c6093c49082a4ebf69a84a2713a060a7 (MD5) Previous issue date: 2016-03-22 / Coordenação de Aperfeiçoamento de Pessoal de Nível Superior - CAPES / To preserve documents is an action already known and that interest to professionals that deal with the organization, processing and dissemination of information in the context of Information Units (Archives, Libraries, Documentation Centres and Museums). In this sense, the present study aims to clarify what constitutes to preserve documents from the thematic analysis of documentary preservation by the Archivist perspective. The research, from the point of view of the objectives, is characterized as being a Descriptive type. The research techniques used were the Bibliographical and Documental. As sources of information were adopted the CAPES databases, SciELO, also books, papers, magazines, laws, resolutions, national and international standards. The study has a qualitative approach and, by the data processing, the Content Analysis technique is used. As results are presented dialogues related to the idea of documentary preservation systematically understood as an area of knowledge that has the potential for scientific and epistemological growth. Based on Archivist it follows that the documentary preservation understood as a policy is an indispensable instrument for the maintenance of institutional collections and information sources present in the Information Units. Finally, it contextualizes that, from the perspective of Information Science, documentary preservation acts as a major factor preponderant to social memory maintenance and finds in Information Science scientific support for its development. / Preservar documentos é uma ação já conhecida e de interesse dos profissionais que lidam com a organização, tratamento e disseminação da informação no contexto das Unidades de Informação (Arquivos, Bibliotecas, Centros de Documentação e Museus). Neste sentido o presente estudo visa elucidar em que consiste preservar documentos a partir da análise temática da preservação documental mediante a perspectiva Arquivística. A pesquisa caracteriza-se do ponto de vista dos objetivos como sendo do tipo Descritiva. As técnicas de investigação utilizadas foram a Bibliográfica e Documental. Como fontes de informação foram adotadas as bases de dados da CAPES, SciELO, também livros, artigos científicos, revistas, leis, resoluções, normas nacionais e internacionais. O estudo possui abordagem qualitativa e mediante o tratamento dos dados é utilizada a técnica de Análise de Conteúdo. Como resultados são apresentados diálogos que apontam para a ideia de preservação documental entendida sistematicamente enquanto área do conhecimento que possui potencial para crescimento científico e epistemológico. Com base na Arquivística se conclui que a preservação documental entendida enquanto política é um instrumento imprescindível à manutenção dos acervos institucionais e fontes de informação presentes nas Unidades de Informação. Por fim, contextualiza-se que a partir da perspectiva da Ciência da Informação a preservação documental atua como fator preponderante a manutenção da memória social e encontra nela respaldo científico para seu desenvolvimento.

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