Line Graphs of Weighted Networks for Overlapping Communities

In this paper, we develop the idea to partition the edges of a weighted graph in order to uncover overlapping communities of its nodes. Our approach is based on the construction of different types of weighted line graphs, i.e. graphs whose nodes are the links of the original graph, that encapsulate differently the relations between the edges. Weighted line graphs are argued to provide an alternative, valuable representation of the system's topology, and are shown to have important applications in community detection, as the usual node partition of a line graph naturally leads to an edge partition of the original graph. This identification allows us to use traditional partitioning methods in order to address the long-standing problem of the detection of overlapping communities. We apply it to the analysis of different social and geographical networks.Comment: 8 Pages. New title and text revisions to emphasise differences from earlier paper

Generalized Relevance LVQ for Time Series

An application of the recently proposed generalized relevance learning vector quantization (GRLVQ) to the analysis and modeling of time series data is presented. We use GRLVQ for two tasks: first, for obtaining a phase space embedding of a scalar time series, and second, for short term and long term data prediction. The proposed embedding method is tested with a signal from the wellknown Lorenz system. Afterwards, it is applied to daily lysimeter observations of water runoff. A one-step prediction of the runoff dynamic is obtained from the classification of high dimensional subseries data vectors, from which a promising technique for long term forecasts is derived

Ingestão de alimentos e adequação de nutrientes no final da infância Food intake and nutritional adequacy in final phase of childhood

Este trabalho reúne informações sobre a ingestão de alimentos e a adequação dos nutrientes no período final da infância. O grupo estudado foi composto por 247 escolares, sendo 150 do sexo feminino e 97 do masculino, com idade de nove e dez anos, pertencentes a escolas públicas municipais de Maceió. Os dados sobre ingestão de alimentos foram coletados através do recordatório de 24 horas e comparados com as recomendações preconizadas pelo National Research Council de 1989. De acordo com os resultados, a ingestão alimentar dos escolares apresentou-se deficiente em relação à energia e aos micronutrientes, especialmente as vitaminas e alguns minerais pesquisados, com exceção do ferro. Essa deficiência foi encontrada independente do sexo. Tais achados sugerem que o aporte insuficiente dos nutrientes estudados, se persistente, poderá contribuir negativamente para o desempenho do crescimento linear durante a fase da adolescência.<br>This study analyzes the results of a dietary intake survey. The main goal was to estimate the nutrient and energy intake of children in final phase of childhood and the nutritional adequacy of their diet. The studied group was composed of 247 schoolchildren (150 females and 97 males, aged nine to ten years old) from public schools of the city of Maceió, state of Alagoas. Food intake data were collected through a 24-hour dietary recall and compared with the standards of National Research Council-Recommended Dietary Allowances (RDA, 1989). According to the results, the children food intake, independently of the sex, was deficient in energy and micronutrients, specially vitamins and some minerals, with the exception of iron. These findings suggest that in this group specific nutrients deficits can be a limiting factor which may contribute to an inadequate growth performance during adolescence