Indexing Structures
Mostrando 1-12 de 12 artigos, teses e dissertações.
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1. Optimizing similarity queries in metric spaces meeting user\ s expectation / Otimização de operações de busca por similaridade em espaços métricos
The complexity of data stored in large databases has increased at very fast paces. Hence, operations more elaborated than traditional queries are essential in order to extract all required information from the database. Therefore, the interest of the database community in similarity search has increased significantly. Two of the well-known types of similarit
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 22/10/2012
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2. Indexação multimídia escalável e busca por similaridade em alta dimensionalidade / Scalable multimedia indexing and similarity search in high dimensionality
A disseminação de grandes coleções de arquivos de imagens, músicas e vídeos tem aumentado a demanda por métodos de indexação e sistemas de recuperação de informações multimídia. No caso de imagens, os sistemas de busca mais promissores são os sistemas baseados no conteúdo, que ao invés de usarem descrições textuais, utilizam vetores de car
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 01/08/2011
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3. Using linear algebra for protein structural comparison and classification
In this article, we describe a novel methodology to extract semantic characteristics from protein structures using linear algebra in order to compose structural signature vectors which may be used efficiently to compare and classify protein structures into fold families. These signatures are built from the pattern of hydrophobic intrachain interactions using
Genetics and Molecular Biology. Publicado em: 2009
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4. Perseus:uma nova técnica para tratar árvores de sufixo persistentes / Perseus: a novel technique to handle persistent suffix trees
Due to the technological advances in molecular biology laboratories, biological databases are extremely voluminous and tend to become more voluminous as data on new genome organisms are available. This introduces the challenge of searching nucleotide sequences efficiently. The suffix tree is an access method used for several applications that search for thes
Publicado em: 2009
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5. Bulk-loading Dynamic Metric Acess Methods / Operação de carga-rápida (bulk-loading) em métodos de acesso métricos
The similarity degree between data elements is the primordial factor for information retrieval in databases that handle complex data, such as genetic sequences, time series and multimedia objects (long images, audio, videos, texts). To answer these queries in a reduced time, it is necessary methods that use metrics to evaluate the similarity between elements
Publicado em: 2007
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6. Sistemas de informação multimídia na preservação de acervos permanentes
Abstract The documental preservation is a key activity for historical analysis and for building the cultural identity of nations. However this task faces the challenge of classifying and storing huge amounts of documents, and the severe compromise between conservation and access. Digital technology offers the possibility of breaking this compromise, by suppl
Publicado em: 2003
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7. MODELAGEM DE CASCAS COM INTERSEÇÕES PARAMÉTRICAS / SHELL MODELING WITH PARAMETRIC INTERSECTION
We present a methodology for modeling finite-element meshes defined on parametric surface patches. The idea is to build curves and generate meshes over the parametric patches built with these curves, which also connect adjacent meshes. The final model is a representation of all meshes combined into a single data structure. The basic tools to generate such me
Publicado em: 1998
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8. EFFICIENT INDEXING OF TEMPORAL DATABASES VIA B+-TREES
Temporal databases has been the object of research for more than two decades, and a wealth of material has been published. However, the majority of papers have dealt with modelling and query languages issues, relatively little research has addressed implementation issues. In this dissertation we investigate the topic of indexing temporal databases, focusing
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 09/08/1996
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9. Population groups: indexing, coverage, and retrieval effectiveness of ethnically related health care issues in health sciences databases.
OBJECTIVES: This study examined methods of accessing (for indexing and retrieval purposes) medical research on population groups in the major abstracting and indexing services of the health sciences literature. DESIGN: The study of diseases in specific population groups is facilitated by the indexing of both diseases and populations in a database. The MEDLIN
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10. Automated protein crystal structure determination using elves
Efficient determination of protein crystal structures requires automated x-ray data analysis. Here, we describe the expert system elves and its use to determine automatically the structure of a 12-kDa protein. Multiwavelength anomalous diffraction analysis of a selenomethionyl derivative was used to image the Asn-16-Ala variant of the GCN4 leucine zipper. In
National Academy of Sciences.
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11. ProteinDBS: a real-time retrieval system for protein structure comparison
We have developed a web server (ProteinDBS) for the life science community to search for similar protein tertiary structures in real time. This system applies computer visualization techniques to extract the predominant visual patterns encoded in two-dimensional distance matrices generated from the three-dimensional coordinates of protein chains. When meanin
Oxford University Press.
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12. Efficient detection of three-dimensional structural motifs in biological macromolecules by computer vision techniques.
Macromolecules carrying biological information often consist of independent modules containing recurring structural motifs. Detection of a specific structural motif within a protein (or DNA) aids in elucidating the role played by the protein (DNA element) and the mechanism of its operation. The number of crystallographically known structures at high resoluti