Índice do volume 90

S2I+: Armazenamento Eficiente em Índice Espaco-Textual

With the popularization of Smartphones with GPS, there is a huge amount of data with spatial and textual information being produced and shared. Hybrid indexes that combine spatial and textual information are being proposed to process queries efficiently. One of the most efficient indexes is S2I (Spatial Inverted Index). However, S2I has a major drawback in terms of index size. In this paper, we...

Un enfoque gramatical para la extracción de términos índice

The extraction of the keywords that characterize a document in a given collection is one of the most important components of an Information Retrieval system. In this article, we propose to apply shallow parsing, implemented by means of cascades of finite-state transducers, to extract complex index terms based on an approximated grammar of Spanish. The coverage of the grammar is small but it all...

How do ants assess food volume?

By comparing the behaviour of Lasius niger scouts at sucrose droplets of different volumes, we empirically identified the criterion used by each scout to assess the amount of food available as well as the rules governing its decision to lay a recruitment trail. When scouts discovered food volumes exceeding the capacity of their crop (3 or 6 µl), 90% immediately returned to the nest laying a rec...

Volume-Sensitive Chloride Channels Do Not

i-FoX: Um Índice Eficiente e Compacto para Dados XML

Resumo Para acelerar consultas em qualquer Banco de Dados, estruturas de ı́ndice são criadas e construı́das a partir de campos que identificam unicamente um item na Base de Dados. O objetivo deste artigo é apresentar o i-FoX, um ı́ndice eficiente e compacto para dados XML, construı́do dentro do contexto do FoX, sistema de Banco de Dados XML Nativo em fase de desenvolvimento na Universidade Federal ...