http://biblioteca.universia.net/searchAutor.do?q=Silva,Luciana%20R. Resultados 1 - 10 de 14 de Silva,Luciana R.. (0,09 segundos) es http://biblioteca.universia.net/img/logotipo.jpg http://biblioteca.universia.net/ http://biblioteca.universia.net/ficha.do?id=270757 OBJETIVO: O leite materno, por suas características nutricionais e imunológicas, protege a criança contra a diarréia. Para avaliar a proteção da amamentação contra a diarréia em menores de um ano, foi realizado um estudo transversal em Feira de Santana, Bahia, no ano de 2001. MÉTODOS: Foram aplicados questionários às mães, por 104 universitários, no dia nacional de vacinação, nas 44 (71,0%) unidades selecionadas por estratificação simples e avaliadas 2.319 crianças, representando 24,3% da pop... Vieira,Graciete O.; Silva,Luciana R.; Vieira,Tatiana de O. http://biblioteca.universia.net/ficha.do?id=311461 Drosophila nappae sp. nov. , belonging to the subgroup I of the Drosophila tripunctata species group of the subgenus Drosophila, is described from flies of one strain established from several females collected from July 1994 through April 1995 at Morro Santana, Porto Alegre, state of Rio Grande do Sul, Brazil. This species has been misidentified during the past fifty years as Drosophila angustibucca (sensu Frota-Pessoa, 1954; non Duda, 1925, described from Costa Rica). Illustrations of male a... Vilela,Carlos R.; Valente,Vera L. S.; Basso-da-Silva,Luciano http://biblioteca.universia.net/ficha.do?id=201817 We consider the cluster and backbone mass distributions between two lines of arbitrary orientations and lengths in porous media in three dimensions, and model the porous media by bond percolation at the percolation threshold $p_c$. We observe that for many geometrical configurations the mass probability distribution presents power law behavior. We determine how the characteristic mass of the distribution scales with such geometrical parameters as the line length, w, the minimal distance betwe... da Silva, Luciano R.; Paul, Gerald; Havlin, Shlomo; Baker, Don R.; Stanley, H. Eugene http://biblioteca.universia.net/ficha.do?id=308514 Hepatic Schistosoma mansoni periovular granulomas undergo changes in size, cellular composition and appearance with time. This phenomenom, known as "immunological modulation", has been thought to reflect host immunological status. However, as modulation has not been observed outside the liver, participation of local factors, hitherto little considered, seems crucial. Components of the extracellular matrix of periovular granulomas of the mouse were particularly studied in three different organ... Silva,Luciana M; Fernandes,André LM; Barbosa Jr,Aryon; Oliveira,Irismar R; Andrade,Zilton A http://biblioteca.universia.net/ficha.do?id=561452 We introduce a new family of networks, the Apollonian networks, that are simultaneously scale-free, small world, Euclidean, space-filling and matching graphs. These networks have a wide range of applications ranging from the description of force chains in polydisperse granular packings and geometry of fully fragmented porous media, to hierarchical road systems and area-covering electrical supply networks. Some of the properties of these networks, namely, the connectivity exponent, the cluster... Andrade Jr., Jose S.; Herrmann, Hans J.; Andrade, Roberto F. S.; da Silva, Luciano R. http://biblioteca.universia.net/ficha.do?id=623876 We introduce a two-dimensional growth model where every new site is located, at a distance $r$ from the barycenter of the pre-existing graph, according to the probability law $1/r^{2+\alpha_G} (\alpha_G \ge 0)$, and is attached to (only) one pre-existing site with a probability $\propto k_i/r^{\alpha_A}_i (\alpha_A \ge 0$; $k_i$ is the number of links of the $i^{th}$ site of the pre-existing graph, and $r_i$ its distance to the new site). Then we numerically determine that the probability dis... Soares, Danyel J. B.; Tsallis, Constantino; Mariz, Ananias M.; da Silva, Luciano R. http://biblioteca.universia.net/ficha.do?id=862548 OBJETIVOS: Descrever os hábitos alimentares de crianças amamentadas e não-amamentadas através da análise dos alimentos consumidos pelas crianças menores de 1 ano de idade na cidade de Feira de Santana, BA, no ano de 2001. MÉTODOS: Foi realizado um estudo transversal, no qual foram aplicados questionários às mães das crianças menores de 1 ano no dia nacional de vacinação, presentes nas 44 (71%) unidades de vacinação, selecionadas por estratificação simples. Foram avaliadas 2.319 crianças, repr... Vieira,Graciete O.; Silva,Luciana R.; Vieira,Tatiana de O.; Almeida,João Aprígio G.; Cabral,Vilma A. http://biblioteca.universia.net/ficha.do?id=21804804 We study different mechanisms of gossip propagation on several network topologies and introduce a new network property, the ``spread factor'', describing the fraction of neighbors that get to know the gossip. We postulate that for scale-free networks the spreading time grows logarithmically with the degree of the victim and prove this statement for the case of the Apollonian network. Applying our concepts to real data from an American school survey, we confirm the logarithmic law and disclose... Lind, Pedro G.; da Silva, Luciano R.; Andrade Jr., José S.; Herrmann, Hans J. http://biblioteca.universia.net/ficha.do?id=25661164 We study a simple model of information propagation in social networks, where two quantities are introduced: the spread factor, which measures the average maximal fraction of neighbors of a given node that interchange information among each other, and the spreading time needed for the information to reach such fraction of nodes. When the information refers to a particular node at which both quantities are measured, the model can be taken as a model for gossip propagation. In this context, we a... Lind, Pedro G.; da Silva, Luciano R.; Andrade Jr., José S.; Herrmann, Hans J. http://biblioteca.universia.net/ficha.do?id=207396 We investigate long-duration time series of human physical activity under three different conditions: healthy individuals in (i) a constant routine protocol and (ii) in regular daily routine, and (iii) individuals diagnosed with multiple chemical sensitivities. We find that in all cases human physical activity displays power law decaying temporal auto-correlations. Moreover, we find that under regular daily routine, time correlations of physical activity are significantly different during diu... Amaral, Luis A. Nunes; Soares, Danyel J. Bezerra; da Silva, Luciano R.; Lucena, Liacir S.; Saito, Mariko; Kumano, Hiroaki; Aoyagi, Naoko; Yamamoto, Yoshiharu