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鄧偉明 i Wai-ming Tang. "Semantics of authentication in workflow security". Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2001. http://hub.hku.hk/bib/B30110828.
Pełny tekst źródłaSax, Matthias J. "Performance Optimizations and Operator Semantics for Streaming Data Flow Programs". Doctoral thesis, Humboldt-Universität zu Berlin, 2020. http://dx.doi.org/10.18452/21424.
Pełny tekst źródłaModern companies are able to collect more data and require insights from it faster than ever before. Relational databases do not meet the requirements for processing the often unstructured data sets with reasonable performance. The database research community started to address these trends in the early 2000s. Two new research directions have attracted major interest since: large-scale non-relational data processing as well as low-latency data stream processing. Large-scale non-relational data processing, commonly known as "Big Data" processing, was quickly adopted in the industry. In parallel, low latency data stream processing was mainly driven by the research community developing new systems that embrace a distributed architecture, scalability, and exploits data parallelism. While these systems have gained more and more attention in the industry, there are still major challenges to operate them at large scale. The goal of this dissertation is two-fold: First, to investigate runtime characteristics of large scale data-parallel distributed streaming systems. And second, to propose the "Dual Streaming Model" to express semantics of continuous queries over data streams and tables. Our goal is to improve the understanding of system and query runtime behavior with the aim to provision queries automatically. We introduce a cost model for streaming data flow programs taking into account the two techniques of record batching and data parallelization. Additionally, we introduce optimization algorithms that leverage our model for cost-based query provisioning. The proposed Dual Streaming Model expresses the result of a streaming operator as a stream of successive updates to a result table, inducing a duality between streams and tables. Our model handles the inconsistency of the logical and the physical order of records within a data stream natively, which allows for deterministic semantics as well as low latency query execution.
Nedas, Konstantinos A. "Semantic Similarity of Spatial Scenes". Fogler Library, University of Maine, 2006. http://www.library.umaine.edu/theses/pdf/NedasKA2006.pdf.
Pełny tekst źródłaGiese, Holger, Stephan Hildebrandt i Leen Lambers. "Toward bridging the gap between formal semantics and implementation of triple graph grammars". Universität Potsdam, 2010. http://opus.kobv.de/ubp/volltexte/2010/4521/.
Pełny tekst źródłaWong, Ping-wai, i 黃炳蔚. "Semantic annotation of Chinese texts with message structures based on HowNet". Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2007. http://hub.hku.hk/bib/B38212389.
Pełny tekst źródłaHerre, Heinrich, i Axel Hummel. "A paraconsistent semantics for generalized logic programs". Universität Potsdam, 2010. http://opus.kobv.de/ubp/volltexte/2010/4149/.
Pełny tekst źródłaLamprecht, Anna-Lena, Tiziana Margaria i Bernhard Steffen. "Bio-jETI : a framework for semantics-based service composition". Universität Potsdam, 2009. http://opus.kobv.de/ubp/volltexte/2010/4506/.
Pełny tekst źródłaZhan, Tianjie. "Semantic analysis for extracting fine-grained opinion aspects". HKBU Institutional Repository, 2010. http://repository.hkbu.edu.hk/etd_ra/1213.
Pełny tekst źródłaOtten, Frederick John. "Using semantic knowledge to improve compression on log files". Thesis, Rhodes University, 2008. http://eprints.ru.ac.za/1660/.
Pełny tekst źródłaHarrison, Dave. "Functional real-time programming : the language Ruth and its semantics". Thesis, University of Stirling, 1988. http://hdl.handle.net/1893/12116.
Pełny tekst źródłaPham, Son Bao Computer Science & Engineering Faculty of Engineering UNSW. "Incremental knowledge acquisition for natural language processing". Awarded by:University of New South Wales. School of Computer Science and Engineering, 2006. http://handle.unsw.edu.au/1959.4/26299.
Pełny tekst źródłaBarber, Nicole. "Aktionsart coercion". University of Western Australia. School of Humanities, 2008. http://theses.library.uwa.edu.au/adt-WU2008.0248.
Pełny tekst źródłaYang, Yimin. "Exploring Hidden Coherent Feature Groups and Temporal Semantics for Multimedia Big Data Analysis". FIU Digital Commons, 2015. http://digitalcommons.fiu.edu/etd/2254.
Pełny tekst źródłaGunaratna, Kalpa. "Semantics-based Summarization of Entities in Knowledge Graphs". Wright State University / OhioLINK, 2017. http://rave.ohiolink.edu/etdc/view?acc_num=wright1496124815009777.
Pełny tekst źródłaVarde, Aparna S. "Graphical data mining for computational estimation in materials science applications". Link to electronic thesis, 2006. http://www.wpi.edu/Pubs/ETD/Available/etd-081506-152633/.
Pełny tekst źródłaSousa, Sidney Roberto de. "Gerenciamento de anotações semanticas de dados na Web para aplicações agricolas". [s.n.], 2010. http://repositorio.unicamp.br/jspui/handle/REPOSIP/275829.
Pełny tekst źródłaDissertação (mestrado) - Universidade Estadual de Campinas, Instituto de Computação
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Resumo: Sistemas de informação geográfica a cada vez mais utilizam informação geo-espacial da Web para produzir informação geográfica. Um grande desafio para tais sistemas é encontrar dados relevantes, onde tal busca é frequentemente baseada em palavras-chave ou nome de arquivos. Porém, tais abordagens carecem de semântica. Desta forma, torna-se necessário oferecer mecanismos para preparação de dados, afim de auxiliar a recuperação de dados semanticamente relevantes. Para atacar este problema, esta dissertação de mestrado propôem uma arquitetura baseada em serviços para gerenciar anotações semânticas. Neste trabalho, uma anotação semântica é um conjunto de triplas - chamadas unidades de anotação semântica -
Abstract: Geographic information systems (GIS) are increasingly using geospatial data from the Web to produce geographic information. One big challenge is to find the relevant data, which often is based on keywords or even file names. However, these approaches lack semantics. Thus, it is necessary to provide mechanisms to prepare data to help retrieval of semantically relevant data. To attack this problem, this dissertation proposes a service-based architecture to manage semantic annotations. In this work, a semantic annotation is a set of triples - called semantic annotation units - < subject? metadata field? object >, where subject is a geospatial resource, (metadata field) contains some characteristic about this resource, and object is an ontology term that semantically associates the metadata field to some appropriate concept. The main contributions of this dissertation are: a comparative study on annotation tools; specification and implementation of a service-based architecture to manage semantic annotations, including services for handling ontology terms; and a comparative analysis of mechanisms for storing semantic annotations. The work takes as case study semantic annotations about agricultural resources
Mestrado
Banco de Dados
Mestre em Ciência da Computação
Vitaliano, Filho Arnaldo Francisco 1982. "Mecanismos de anotação semântica para workfows cientificos". [s.n.], 2009. http://repositorio.unicamp.br/jspui/handle/REPOSIP/275760.
Pełny tekst źródłaDissertação (mestrado) - Universidade Estadual de Campinas, Instituto de Computação
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Resumo: O compartilhamento de informações, processos e modelos de experimentos entre cientistas de diferentes organizações e domínios do conhecimento vem aumentando com a disponibilização dessas informações e modelos na Web. Muitos destes modelos de experimentos são descritos como workflows científicos. Entretanto, não existe uma padronização para a sua descrição, dificultando assim o reaproveitamento de workflows e seus componentes já existentes. A dissertação contribui para a solução deste problema com os seguintes resultados: a análise dos problemas relativos ao compartilhamento e projeto cooperativo de workflows científicos na Web, análise de aspectos de semântica e metadados relacionados a estes workflows, a disponibilização de um editor Web de workflows usando padrões WFMC e, o desenvolvimento de um modelo de anotação semântica para workflows científicos. Com isto, a dissertação cria a base para permitir a descoberta, reuso e compartilhamento de workflows científicos nas Web. O editor permite que pesquisadores construam seus workflows e anotações de forma online, e permite o consequente teste, com dados externos, do sistema de anotações
Abstract: The sharing of information, processes and models of experiments is increasing among scientists from many organizations and areas of knowledge, and thus there is a need for supply mechanisms of workflow discovery. Many of these models are described as scientific workflows. However, there is no default specification to describe them, which complicates the reuse of workflows and components that are available. This thesis contributes to solving this problem by presenting the following results: analysis of issues related to the sharing and cooperative design of scientific workflows on the Web; analysis of semantic aspects and metadata related to workflows, the development of a Web-based workflow editor, which incorporates our semantic annotation model for scientific workflows. Given these factors, this work creates the basis to allow the discovery, reuse and sharing of scientific workflows in the Web
Mestrado
Banco de Dados
Mestre em Ciência da Computação
Herre, Heinrich, i Axel Hummel. "Stationary generated models of generalized logic programs". Universität Potsdam, 2010. http://opus.kobv.de/ubp/volltexte/2010/4150/.
Pełny tekst źródłaFaruque, Md Ehsanul. "A Minimally Supervised Word Sense Disambiguation Algorithm Using Syntactic Dependencies and Semantic Generalizations". Thesis, University of North Texas, 2005. https://digital.library.unt.edu/ark:/67531/metadc4969/.
Pełny tekst źródłaSinha, Ravi Som. "Graph-based Centrality Algorithms for Unsupervised Word Sense Disambiguation". Thesis, University of North Texas, 2008. https://digital.library.unt.edu/ark:/67531/metadc9736/.
Pełny tekst źródłaSmith, Marc L. "View-centric reasoning about parallel and distributed computation". Doctoral diss., University of Central Florida, 2000. http://digital.library.ucf.edu/cdm/ref/collection/RTD/id/1597.
Pełny tekst źródłaThe development of distributed applications has not progressed as rapidly as its enabling technologies. In part, this is due to the difficulty of reasoning about such complex systems. In contrast to sequential systems, parallel systems give rise to parallel events, and the resulting uncertainty of the observed order of these events. Loosely coupled distributed systems complicate this even further by introducing the element of multiple imperfect observers of these parallel events. The goal of this dissertation is to advance parallel and distributed systems development by producing a parameterized model that can be instantiated to reflect the computation and coordination properties of such systems. The result is a model called paraDOS that we show to be general enough to have instantiations of two very distinct distributed computation models, Actors and tuple space. We show how paraDOS allows us to use operational semantics to reason about computation when such reasoning must account for multiple, inconsistent and imperfect views. We then extend the paraDOS model with an abstraction to support composition of communicating computational systems. This extension gives us a tool to reason formally about heterogeneous systems, and about new distributed computing paradigms such as the multiple tuple spaces support seen in Sun's JavaSpaces and IBM's T Spaces.
Ph.D.
Doctorate;
School of Electrical Engineering and Computer Science
Engineering and Computer Science
Electrical Engineering and Computer Science
196 p.
xiv, 196 leaves, bound : ill. ; 28 cm.
Hartig, Olaf. "Querying a Web of Linked Data". Doctoral thesis, Humboldt-Universität zu Berlin, Mathematisch-Naturwissenschaftliche Fakultät II, 2014. http://dx.doi.org/10.18452/17015.
Pełny tekst źródłaDuring recent years a set of best practices for publishing and connecting structured data on the World Wide Web (WWW) has emerged. These best practices are referred to as the Linked Data principles and the resulting form of Web data is called Linked Data. The increasing adoption of these principles has lead to the creation of a globally distributed space of Linked Data that covers various domains such as government, libraries, life sciences, and media. Approaches that conceive this data space as a huge distributed database and enable an execution of declarative queries over this database hold an enormous potential; they allow users to benefit from a virtually unbounded set of up-to-date data. As a consequence, several research groups have started to study such approaches. However, the main focus of existing work is to address practical challenges that arise in this context. Research on the foundations of such approaches is largely missing. This dissertation closes this gap.
Doyen, Laurent. "Algorithmic analysis of complex semantics for timed and hybrid automata". Doctoral thesis, Universite Libre de Bruxelles, 2006. http://hdl.handle.net/2013/ULB-DIPOT:oai:dipot.ulb.ac.be:2013/210853.
Pełny tekst źródłaThe decidability and algorithmic analysis of timed and hybrid automata have been intensively studied in the literature. The central result for timed automata is that they are positively decidable. This is not the case for hybrid automata, but semi-algorithmic methods are known when the dynamics is relatively simple, namely a linear relation between the derivatives of the variables.
With the increasing complexity of nowadays systems, those models are however limited in their classical semantics, for modelling realistic implementations or dynamical systems.
In this thesis, we study the algorithmics of complex semantics for timed and hybrid automata.
On the one hand, we propose implementable semantics for timed automata and we study their computational properties: by contrast with other works, we identify a semantics that is implementable and that has decidable properties.
On the other hand, we give new algorithmic approaches to the analysis of hybrid automata whose dynamics is given by an affine function of its variables.
Doctorat en sciences, Spécialisation Informatique
info:eu-repo/semantics/nonPublished
Yang, Li. "Improving Topic Tracking with Domain Chaining". Thesis, University of North Texas, 2003. https://digital.library.unt.edu/ark:/67531/metadc4274/.
Pełny tekst źródłaCregan, Anne Computer Science & Engineering Faculty of Engineering UNSW. "Weaving the semantic web: Contributions and insights". Publisher:University of New South Wales. Computer Science & Engineering, 2008. http://handle.unsw.edu.au/1959.4/42605.
Pełny tekst źródłaMacario, Carla Geovana do Nascimento. "Anotação semantica de dados geoespaciais". [s.n.], 2009. http://repositorio.unicamp.br/jspui/handle/REPOSIP/275838.
Pełny tekst źródłaTese (doutorado) - Universidade Estadual de Campinas, Instituto de Computação
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Resumo: Dados geoespaciais constituem a base para sistemas de decisão utilizados em vários domínios, como planejamento de transito, fornecimento de serviços ou controle de desastres. Entretanto, para serem usados, estes dados precisam ser analisados e interpretados, atividades muitas vezes trabalhosas e geralmente executadas por especialistas. Apesar disso estas interpretacoes nao sao armazenadas e quando o são, geralmente correspondem a alguma informacao textual e em linguagem própria, gravadas em arquivos tecnicos. A ausencia de solucoes eficientes para armazenar estas interpretaçães leva a problemas como retrabalho e dificuldades de compartilhamento de informação. Neste trabalho apresentamos uma soluçao para estes problemas que baseia-se no uso de anotações semânticas, uma abordagem que promove um entendimento comum dos conceitos usados. Para tanto, propomos a adocão de workflows científicos para descricao do processo de anotacão dos dados e tambíem de um esquema de metadados e ontologias bem conhecidas, aplicando a soluçao a problemas em agricultura. As contribuicães da tese envolvem: (i) identificacao de um conjunto de requisitos para busca semantica a dados geoespaciais; (ii) identificacao de características desejóveis para ferramentas de anotacão; (iii) proposta e implementacao parcial de um framework para a anotacão semântica de diferentes tipos de dados geoespaciais; e (iv) identificacao dos desafios envolvidos no uso de workflows para descrever o processo de anotaçcaão. Este framework foi parcialmente validado, com implementação para aplicações em agricultura
Abstract: Geospatial data are a basis for decision making in a wide range of domains, such as traffic planning, consumer services disasters controlling. However, to be used, these kind of data have to be analyzed and interpreted, which constitutes a hard task, prone to errors, and usually performed by experts. Although all of these factors, the interpretations are not stored. When this happens, they correspond to descriptive text, which is stored in technical files. The absence of solutions to efficiently store them leads to problems such as rework and difficulties in information sharing. In this work we present a solution for these problems based on semantic annotations, an approach for a common understanding of concepts being used. We propose the use of scientific workflows to describe the annotation process for each kind of data, and also the adoption of well known metadata schema and ontologies. The contributions of this thesis involves: (i) identification of requirements for semantic search of geospatial data; (ii) identification of desirable features for annotation tools; (iii) proposal, and partial implementation, of a a framework for semantic annotation of different kinds of geospatial data; and (iv) identification of challenges in adopting scientific workflows for describing the annotation process. This framework was partially validated, through an implementation to produce annotations for applications in agriculture
Doutorado
Banco de Dados
Doutora em Ciência da Computação
Santanchè, André 1968. "Fluid Web e componentes de conteudo digital : da visão centrada em documentos para a visão centrada em conteudo". [s.n.], 2006. http://repositorio.unicamp.br/jspui/handle/REPOSIP/276279.
Pełny tekst źródłaTese (doutorado) - Universidade Estadual de Campinas, Instituto de Computação
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Resumo: A Web está evoluindo de um espaço para publicação/consumo de documentos para um ambiente para trabalho colaborativo, onde o conteúdo digital pode viajar e ser replicado, adaptado, decomposto, fundido e transformado. Designamos esta perspectiva por Fluid Web. Esta visão requer uma reformulação geral da abordagem típica orientada a documentos que permeia o gerenciamento de conteúdo na Web. Esta tese apresenta nossa solução para a Fluid Web, que permite nos deslocarmos de uma perspectiva orientada a documentos para outra orientada a conteúdo, onde "conteúdo" pode ser qualquer objeto digital. A solução é baseada em dois eixos: (i) uma unidade auto-descritiva que encapsula qualquer tipo de artefato de conteúdo - o Componente de Conteúdo Digital (Digital Content Component - DCC); e (ii) uma infraestrutura para a Fluid Web que permite o gerenciamento e distribuição de DCCs na Web, cujo objetivo é dar suporte à colaboração na Web. Concebidos para serem reusados e adaptados, os DCCs encapsulam dados e software usando uma única estrutura, permitindo deste modo composição homogênea e processamento de qualquer conteúdo digital, seja este executável ou não. Estas propriedades são exploradas pela nossa infraestrutura para a Fluid Web, que engloba mecanismos de descoberta e de anotação de DCCs em múltiplos níveis, gerenciamento de configurações e controle de versões. Nosso trabalho explora padrões de Web Semântica e ontologias taxonômicas, que servem como uma ponte semântica, unificando vocabulários para gerenciamento de DCCs e facilitando as tarefas de descrição/indexação/descoberta de conteúdo. Os DCCs e sua infraestrura foram implementados e são ilustrados por meio de exemplos práticos, para aplicações científicas. As principais contribuições desta tese são: o modelo de Digital Content Component; o projeto da infraestrutura para a Fluid Web baseada em DCCs, com suporte para armazenamento baseado em repositórios, compartilhamento, controle de versões e gerenciamento de configurações distribuídas; um algoritmo para a descoberta de conteúdo digital que explora a semântica associada aos DCCs; e a validação prática dos principais conceitos desta pesquisa, com a implementação de protótipos
Abstract: The Web is evolving from a space for publicationj consumption of documents to an environment for collaborative work, where digital content can traveI and be replicated, adapted, decomposed, fusioned and transformed. We call this the Fluid Web perspective. This view requires a thorough revision of the typical document-oriented approach that permeates content management on the Web. This thesis presents our solution for the Fluid Web, which allows moving from the document-oriented to a content-oriented perspective, where "content" can be any digital object. The solution is based on two axes: a self-descriptive unit to encapsulate any kind of content artifact - the Digital Content Component (DCC); and a Fluid Web infrastructure that provides management and deployment of DCCs through the Web, and whose goal is to support collaboration on the Web. Designed to be reused and adapted, DCCs encapsulate data and software using a single structure, thus allowing homogeneous composition and processing of any digital content, be it executable or noto These properties are exploited by our Fluid Web infrastructure, which supports DCC multilevel annotation and discovery mechanisms, configuration management and version controI. Our work extensively explores Semantic Web standards and taxonomic ontologies, which serve as a semantic bridge, unifying DCC management vocabularies and improving DCC descriptionjindexingjdiscovery. DCCs and infrastructure have been implemented and are illustrated by means of examples, for scientific applications. The main contributions of this thesis are: the model of Digital Content Component; the design of the Fluid Web infrastructure based on DCCs, with support for repositorybased storage, distributed sharing, version control and configuration management; an algorithm for digital content discovery that explores DCe semantics; and a practical validation of the main concepts in this research through implementation of prototypes
Doutorado
Banco de Dados
Mestre em Ciência da Computação
Thakur, Amritanshu. "Semantic construction with provenance for model configurations in scientific workflows". Master's thesis, Mississippi State : Mississippi State University, 2008. http://library.msstate.edu/etd/show.asp?etd=etd-07312008-092758.
Pełny tekst źródłaSchwartz, Hansen A. "The acquisition of lexical knowledge from the web for aspects of semantic interpretation". Doctoral diss., University of Central Florida, 2011. http://digital.library.ucf.edu/cdm/ref/collection/ETD/id/5028.
Pełny tekst źródłaID: 029808979; System requirements: World Wide Web browser and PDF reader.; Mode of access: World Wide Web.; Thesis (Ph.D.)--University of Central Florida, 2011.; Includes bibliographical references (p. 141-160).
Ph.D.
Doctorate
Electrical Engineering and Computer Science
Engineering and Computer Science
Marques, Caio Miguel [UNESP]. "Pangea - Arquitetura semântica para a integração de dados e modelos geoespaciais na Web". Universidade Estadual Paulista (UNESP), 2010. http://hdl.handle.net/11449/98654.
Pełny tekst źródłaCoordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)
Em muitas áreas do conhecimento e da atividade humana é requerida, impreterivelmente, a integração de informações geográficas. Atualmente, grande quantidade dessas informações geográficas estão publicadas na Web, por atores diversos, indo desde instituições governamentais, academia, até cidadãos comuns. Esses atores publicam dados geográficos em diversos formatos e utilizando tecnologias variadas. Neste contexto, apesar da enorme quantidade de dados e modelos geográficos publicados na Web, a diversidade de formatos e tecnologias nos quais são disponibilizados, somada à carência das soluções atualmente existentes, limitam o consumo, a integração e o compartilhamento das informações geográficas. Recentemente tem sido propostas abordagens que agregam semântica na descrição das informações geográficas, de modo a possibilitar melhorias no descobrimento e integração desse tipo de informação. Nesse sentido, neste trabalho é apresentado um levantamento das arquiteturas e infraestruturas semânticas utilizadas na integração e compartilhamento de dados e modelos geográficos. Com base nesse levantamento foram identificados os aspectos transversais às infraestruturas estudadas. Tais aspectos foram utilizados na definição do projeto da arquitetura descrita neste trabalho, denominada Pangea, que é composta dos seguintes módulos: anotação semântica, alinhamento de descrição semântica, repositórios semânticos, descobrimento e integração semântica de dados e modelos geográficos. Dentre os módulo mencionados foi implementado o repositório semântico e algumas funcionalidades referentes ao descobrimento e integração semântica de dados. Para avaliar os componentes implementados da Pangea é apresentado um estudo de caso referente ao contexto de derramamento de óleo no litoral
The geographic information is definitely required in many areas of human knowledge and activity. Nowadays, a large part of this geographic information is published on the Web by various authors, from the governmental institutions and academy to the ordinary citizen. These authors publish the geographic data in several formats and using different technologies. In this context, in spite of having a great amount of available data on the Web, the diversity of formats and technologies that they are released, limit the consumption, the integration and the geographic information sharing. Recently, it has been proposed the approach that adds the semantics in the description of geographic information, so the discovery and integration can be enhanced. This work presents a study of semantics architectures and frameworks used in the geographic data integration and sharing. Based in this study, the transversal aspects to the studied architectures were identified. Those aspects were used in the project definition of the Pangea architecture which is composed by the following modules: semantic notation, alignment of semantic description, and semantic integration. In order to evaluate some of the Pangea components, a study of case is conducted in the problems of the environmental domain, considering oil blowout disasters
Marques, Caio Miguel. "Pangea - Arquitetura semântica para a integração de dados e modelos geoespaciais na Web /". São José do Rio Preto : [s.n.], 2010. http://hdl.handle.net/11449/98654.
Pełny tekst źródłaBanca: Marilde Terezinha Prado Santos
Banca: Carlos Roberto Valêncio
Resumo: Em muitas áreas do conhecimento e da atividade humana é requerida, impreterivelmente, a integração de informações geográficas. Atualmente, grande quantidade dessas informações geográficas estão publicadas na Web, por atores diversos, indo desde instituições governamentais, academia, até cidadãos comuns. Esses atores publicam dados geográficos em diversos formatos e utilizando tecnologias variadas. Neste contexto, apesar da enorme quantidade de dados e modelos geográficos publicados na Web, a diversidade de formatos e tecnologias nos quais são disponibilizados, somada à carência das soluções atualmente existentes, limitam o consumo, a integração e o compartilhamento das informações geográficas. Recentemente tem sido propostas abordagens que agregam semântica na descrição das informações geográficas, de modo a possibilitar melhorias no descobrimento e integração desse tipo de informação. Nesse sentido, neste trabalho é apresentado um levantamento das arquiteturas e infraestruturas semânticas utilizadas na integração e compartilhamento de dados e modelos geográficos. Com base nesse levantamento foram identificados os aspectos transversais às infraestruturas estudadas. Tais aspectos foram utilizados na definição do projeto da arquitetura descrita neste trabalho, denominada Pangea, que é composta dos seguintes módulos: anotação semântica, alinhamento de descrição semântica, repositórios semânticos, descobrimento e integração semântica de dados e modelos geográficos. Dentre os módulo mencionados foi implementado o repositório semântico e algumas funcionalidades referentes ao descobrimento e integração semântica de dados. Para avaliar os componentes implementados da Pangea é apresentado um estudo de caso referente ao contexto de derramamento de óleo no litoral
Abstract: The geographic information is definitely required in many areas of human knowledge and activity. Nowadays, a large part of this geographic information is published on the Web by various authors, from the governmental institutions and academy to the ordinary citizen. These authors publish the geographic data in several formats and using different technologies. In this context, in spite of having a great amount of available data on the Web, the diversity of formats and technologies that they are released, limit the consumption, the integration and the geographic information sharing. Recently, it has been proposed the approach that adds the semantics in the description of geographic information, so the discovery and integration can be enhanced. This work presents a study of semantics architectures and frameworks used in the geographic data integration and sharing. Based in this study, the transversal aspects to the studied architectures were identified. Those aspects were used in the project definition of the Pangea architecture which is composed by the following modules: semantic notation, alignment of semantic description, and semantic integration. In order to evaluate some of the Pangea components, a study of case is conducted in the problems of the environmental domain, considering oil blowout disasters
Mestre
Abu, Salih Bilal Ahmad Abdal Rahman. "Trustworthiness in Social Big Data Incorporating Semantic Analysis, Machine Learning and Distributed Data Processing". Thesis, Curtin University, 2018. http://hdl.handle.net/20.500.11937/70285.
Pełny tekst źródłaEndris, Kemele M. [Verfasser]. "Federated Query Processing over Heterogeneous Data Sources in a Semantic Data Lake / Kemele M. Endris". Bonn : Universitäts- und Landesbibliothek Bonn, 2020. http://d-nb.info/1218301740/34.
Pełny tekst źródłaChui, Ka-lam Elsa, i 徐嘉琳. "A semantic web architecture for personalized profiles". Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2003. http://hub.hku.hk/bib/B2961336X.
Pełny tekst źródłaGoss, Ryan Gavin. "Enabling e-learning 2.0 in information security education: a semantic web approach". Thesis, Nelson Mandela Metropolitan University, 2009. http://hdl.handle.net/10948/909.
Pełny tekst źródłaPerry, Matthew Steven. "A Framework to Support Spatial, Temporal and Thematic Analytics over Semantic Web Data". Wright State University / OhioLINK, 2008. http://rave.ohiolink.edu/etdc/view?acc_num=wright1219267560.
Pełny tekst źródłaMorgan, Jac F. "The design of a small business database using the Semantic Database Model". Thesis, Kansas State University, 1985. http://hdl.handle.net/2097/9867.
Pełny tekst źródłaYu, Zhiguo. "Cooperative Semantic Information Processing for Literature-Based Biomedical Knowledge Discovery". UKnowledge, 2013. http://uknowledge.uky.edu/ece_etds/33.
Pełny tekst źródłaBergström, Mattias, i Per Fahlander. "Evaluating a Novel, Scalable Natural Language Processing Heuristic for Determining Semantic Relatedness". Thesis, KTH, Skolan för elektroteknik och datavetenskap (EECS), 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-260067.
Pełny tekst źródłaDistributionssemantik är ett nytt forskningsfält som syftar till att kvantifiera hur nära en text är till en annan gällande kontextuell innebörd. I den här studien föreslår och utvärderar vi en ny distribuerad semantikmodell på hur överensstämmande dess förutsägelser är med en uppsättning av 12227 mänskliga åsikter. Vi kallar denna metod Refined Semantic Relatedness (RSR), som tillämpar ett inkrementellt förbättringsbart underlagsindex samt några distributionsprinciper för att generera förutsägelser teoretiskt sett bättre än slumpen. Genom att använda 1951st förbearbetade Wikipedia artiklar som grund för dessa förutsägelser, förutspådde modellen de mänskliga åsikterna med en Pearson-korrelation på 0,3. I tidigare litteratur har det hävdats att Explicit Semantic Analysis (ESA Wiki) uppnår en motsvarande Pearson-korrelationpå 0,72 genom att använda 241393 förarbetade Wikipedia artiklar. Detta motsvarar att ungefär 5,76 gånger mer varians tillgodoses, men det är också ett resultat av ett betydligt mer omfattande förarbete av artiklar. Medan värdet av RSR för att förutsäga mänskiliga uppfattningar kring semantisk likhet visade sig vara relativt lågt, så kan de orsakande begränsningarna i studien åtgärdas i framtida forskning. Vi tror att den här rapporten på ett eller annat sätt kan bidra med några nya idéer till forskningsfältet.
Marupudi, Surendra Brahma. "Framework for Semantic Integration and Scalable Processing of City Traffic Events". Wright State University / OhioLINK, 2016. http://rave.ohiolink.edu/etdc/view?acc_num=wright1472505847.
Pełny tekst źródłaLinckels, Serge, i Christoph Meinel. "An e-librarian service : natural language interface for an efficient semantic search within multimedia resources". Universität Potsdam, 2005. http://opus.kobv.de/ubp/volltexte/2009/3308/.
Pełny tekst źródłaChan, Wing Sze. "Semantic search of multimedia data objects through collaborative intelligence". HKBU Institutional Repository, 2010. http://repository.hkbu.edu.hk/etd_ra/1171.
Pełny tekst źródłaCourtot, Melanie. "Semantic models in biomedicine : building interoperating ontologies for biomedical data representation and processing in pharmacovigilance". Thesis, University of British Columbia, 2014. http://hdl.handle.net/2429/46804.
Pełny tekst źródłaRäling, Romy [Verfasser], Isabell [Akademischer Betreuer] Wartenburger i Astrid [Akademischer Betreuer] Schröder. "Age of acquisition and semantic typicality effects : evidences for distinct processing origins from behavioural and ERP data in healthy and impaired semantic processing / Romy Räling ; Isabell Wartenburger, Astrid Schröder". Potsdam : Universität Potsdam, 2016. http://d-nb.info/1218400897/34.
Pełny tekst źródłaHellmann, Sebastian. "Integrating Natural Language Processing (NLP) and Language Resources Using Linked Data". Doctoral thesis, Universitätsbibliothek Leipzig, 2015. http://nbn-resolving.de/urn:nbn:de:bsz:15-qucosa-157932.
Pełny tekst źródłaFan, Yang, Hidehiko Masuhara, Tomoyuki Aotani, Flemming Nielson i Hanne Riis Nielson. "AspectKE*: Security aspects with program analysis for distributed systems". Universität Potsdam, 2010. http://opus.kobv.de/ubp/volltexte/2010/4136/.
Pełny tekst źródłaNecşulescu, Silvia. "Automatic acquisition of lexical-semantic relations: gathering information in a dense representation". Doctoral thesis, Universitat Pompeu Fabra, 2016. http://hdl.handle.net/10803/374234.
Pełny tekst źródłaLes relacions lexicosemàntiques entre paraules són una informació clau per a moltes tasques del PLN, què requereixen aquest coneixement en forma de recursos lingüístics. Aquesta tesi tracta l’adquisició d'instàncies lexicosemàntiques. Els sistemes actuals utilitzen representacions basades en patrons dels contextos en què dues paraules coocorren per detectar la relació que s'hi estableix. Aquest enfocament s'enfronta a problemes de falta d’informació: fins i tot en el cas de treballar amb corpus de grans dimensions, hi haurà parells de paraules relacionades que no coocorreran, o no ho faran amb la freqüència necessària. Per tant, el nostre objectiu principal ha estat proposar noves representacions per predir si dues paraules estableixen una relació lexicosemàntica. La intuïció era que aquestes representacions noves havien de contenir informació sobre patrons dels contextos, combinada amb informació sobre el significat de les paraules implicades en la relació. Aquestes dues fonts d'informació havien de ser la base d'una estratègia de generalització que oferís informació fins i tot quan les dues paraules no coocorrien.
Linckels, Serge. "An e-librarian service : supporting explorative learning by a description logics based semantic retrieval tool". Phd thesis, Universität Potsdam, 2008. http://opus.kobv.de/ubp/volltexte/2008/1745/.
Pełny tekst źródłaObwohl sich die Verfügbarkeit von pädagogischen Inhalten in elektronischer Form stetig erhöht, ist deren Nutzen in einem schulischen Umfeld recht gering. Die Hauptursache dessen ist, dass es zu viele unzuverlässige, redundante und nicht relevante Informationen gibt. Das Finden von passenden Lernobjekten ist eine schwierige Aufgabe, die vom benutzerbasierten Filtern der passenden Informationen abhängig ist. Damit Wissensbanken wie das online Tele-TASK Archiv zu nützlichen, pädagogischen Ressourcen werden, müssen Lernobjekte korrekt, zuverlässig und in maschinenverständlicher Form identifiziert werden, sowie effiziente Suchwerkzeuge entwickelt werden. Unser Ziel ist es, einen E-Bibliothekar-Dienst zu schaffen, der multimediale Ressourcen in einer Wissensbank auf effizientere Art und Weise findet als mittels Navigieren durch ein Inhaltsverzeichnis oder mithilfe einer einfachen Stichwortsuche. Unsere Prämisse ist, dass passendere Ergebnisse gefunden werden könnten, wenn die semantische Suchmaschine den Sinn der Benutzeranfrage verstehen würde. In diesem Fall wären die gelieferten Antworten logische Konsequenzen einer Inferenz und nicht die einer Schlüsselwortsuche. Tests haben gezeigt, dass unser E-Bibliothekar-Dienst unter allen Dokumenten in einer gegebenen Wissensbank diejenigen findet, die semantisch am besten zur Anfrage des Benutzers passen. Dabei gilt, dass der Benutzer eine vollständige und präzise Antwort erwartet, die keine oder nur wenige Zusatzinformationen enthält. Außerdem ist unser System in der Lage, dem Benutzer die Qualität und Pertinenz der gelieferten Antworten zu quantifizieren und zu veranschaulichen. Schlussendlich liefert unser E-Bibliothekar-Dienst dem Benutzer immer eine Antwort, selbst wenn das System feststellt, dass es keine vollständige Antwort auf die Frage gibt. Unser E-Bibliothekar-Dienst ermöglicht es dem Benutzer, seine Fragen in einer sehr einfachen und menschlichen Art und Weise auszudrücken, nämlich in natürlicher Sprache. Linguistische Informationen und ein gegebener Kontext in Form einer Ontologie werden für die semantische Übersetzung der Benutzereingabe in eine logische Form benutzt. Unser E-Bibliothekar-Dienst wurde prototypisch in drei unterschiedliche pädagogische Werkzeuge umgesetzt. In zwei Experimenten wurde in einem pädagogischen Umfeld die Angemessenheit und die Zuverlässigkeit dieser Werkzeuge als Komplement zum klassischen Unterricht geprüft. Die Hauptergebnisse sind folgende: Erstens wurde festgestellt, dass Schüler generell akzeptieren, ganze Fragen einzugeben - anstelle von Stichwörtern - wenn dies ihnen hilft, bessere Suchresultate zu erhalten. Zweitens, das wichtigste Resultat aus den Experimenten ist die Erkenntnis, dass Schuleresultate verbessert werden können, wenn Schüler unseren E-Bibliothekar-Dienst verwenden. Wir haben eine generelle Verbesserung von 5% der Schulresultate gemessen. 50% der Schüler haben ihre Schulnoten verbessert, 41% von ihnen sogar maßgeblich. Einer der Hauptgründe für diese positiven Resultate ist, dass die Schüler motivierter waren und folglich bereit waren, mehr Einsatz und Fleiß in das Lernen und in das Erwerben von neuem Wissen zu investieren.
Greenwell, Richard. "An approach to the semantic intelligence cloud". Thesis, Edinburgh Napier University, 2018. http://researchrepository.napier.ac.uk/Output/1255157.
Pełny tekst źródłaZampetakis, Stamatis. "Scalable algorithms for cloud-based Semantic Web data management". Thesis, Paris 11, 2015. http://www.theses.fr/2015PA112199/document.
Pełny tekst źródłaIn order to build smart systems, where machines are able to reason exactly like humans, data with semantics is a major requirement. This need led to the advent of the Semantic Web, proposing standard ways for representing and querying data with semantics. RDF is the prevalent data model used to describe web resources, and SPARQL is the query language that allows expressing queries over RDF data. Being able to store and query data with semantics triggered the development of many RDF data management systems. The rapid evolution of the Semantic Web provoked the shift from centralized data management systems to distributed ones. The first systems to appear relied on P2P and client-server architectures, while recently the focus moved to cloud computing.Cloud computing environments have strongly impacted research and development in distributed software platforms. Cloud providers offer distributed, shared-nothing infrastructures that may be used for data storage and processing. The main features of cloud computing involve scalability, fault-tolerance, and elastic allocation of computing and storage resources following the needs of the users.This thesis investigates the design and implementation of scalable algorithms and systems for cloud-based Semantic Web data management. In particular, we study the performance and cost of exploiting commercial cloud infrastructures to build Semantic Web data repositories, and the optimization of SPARQL queries for massively parallel frameworks.First, we introduce the basic concepts around Semantic Web and the main components and frameworks interacting in massively parallel cloud-based systems. In addition, we provide an extended overview of existing RDF data management systems in the centralized and distributed settings, emphasizing on the critical concepts of storage, indexing, query optimization, and infrastructure. Second, we present AMADA, an architecture for RDF data management using public cloud infrastructures. We follow the Software as a Service (SaaS) model, where the complete platform is running in the cloud and appropriate APIs are provided to the end-users for storing and retrieving RDF data. We explore various storage and querying strategies revealing pros and cons with respect to performance and also to monetary cost, which is a important new dimension to consider in public cloud services. Finally, we present CliqueSquare, a distributed RDF data management system built on top of Hadoop, incorporating a novel optimization algorithm that is able to produce massively parallel plans for SPARQL queries. We present a family of optimization algorithms, relying on n-ary (star) equality joins to build flat plans, and compare their ability to find the flattest possibles. Inspired by existing partitioning and indexing techniques we present a generic storage strategy suitable for storing RDF data in HDFS (Hadoop’s Distributed File System). Our experimental results validate the efficiency and effectiveness of the optimization algorithm demonstrating also the overall performance of the system