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Search Results: 1 - 10 of 51366 matches for " Evandro;Silva "
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Demands for short-run assets and liabilities in Brazil: a portfolio approach
Silva, Evandro;Resende, Marcelo;
Revista Brasileira de Economia , 2006, DOI: 10.1590/S0034-71402006000100004
Abstract: the study explores the behavior of the short run demands for assets and liabilities in the brazilian industry during the 1990-1998 period based on portfolio theory. the implied set of demand equations is estimated for different sub-periods indicating that short-term demand patterns do not substantially differ when one compares the overall sample for 1990-98 and the sample pertaining a more stable period during 1994-98. good support was found for explanatory factors referring to the stock of long term (nonchoice) items and variables approximating the activity level of the firm and the economy. the responsiveness of short-run assets and liabilities to relative returns (costs) of those items was weaker than previous studies for the u.k (hay and louri (1989, 1991, 1996)).
Calibration of Numerical Model Applied to a Shear Zone Located on a Slope in an Open Pit Mine—Case History  [PDF]
Evandro Moraes da Gama, Bruno C. R. da Silva
Geomaterials (GM) , 2012, DOI: 10.4236/gm.2012.21002
Abstract: The instability of a pit mine slope diagnostic caused by the slipping of a localized deep shear zone is described. The slope was designed on ultra basic, serpentine and metabasite rock formations with an angle varying from 40 to 45 de- grees. The perturbed slope zone was classified as RMR 12 and the non-perturbed zone as RMR 75. The boundary of these zones is defined as the shear zone. The pit slope was field mapped in detail and the mechanical properties of the rock were obtained through a laboratory test. The lab data were further processed using the RMR mechanical classifi- cation system. The Distinct Elements Code numerical modeling and simulation software was used to design the pit slope. The model was calibrated through topographic mapping of the points on the ground. The task of calibrating a numerical model is far from simple. Exhaustive attempts to find points of reference are required. The mechanical be- havior in function of the time factor is a problem that has yet to be solved. The instant deformation generated in the numerical model generated functions that can be compared with the deformations of quick shifts acquired in the topog- raphic monitoring. SMR is indeed more often recommended for Pit Slopes, though the fact that we have used RMR does not invalidate the classification for the modeling effect. The main parameters such as spacing, filling, diving direc- tion and continuity allow for compartmentalization of the modeled area. The objective of the modeling was not to pro- ject slopes because this massif was undergoing a progressive slow rupture. The objective of the modeling was to study the movement of the mass of rock and its progressive rupture caused by a shear zone.
Comentários sobre o Estudo Pró-Saúde: características gerais e aspectos metodológicos Comments on the Pro Health Study: general features and methodological aspects
Evandro da Silva Freire Coutinho
Revista Brasileira de Epidemiologia , 2005, DOI: 10.1590/s1415-790x2005000400015
A discrete finite-dimensional phase space approach for Fe8 magnetic clusters: characterizing tunneling efects via Wigner and Husimi functions
Evandro C. Silva,Diogenes Galetti
Physics , 2008,
Abstract: Discrete quantum phase space formalism is used to discuss some basic aspects of the spin tunneling occurring in Fe8 magnetic cluster by means of Wigner functions as well as Husimi distributions. Those functions were obtained for sharp angle states and symmetric combinations of the lowest energy doublet with the application of an external magnetic field. The time evolution of those functions carried out numerically allows one to extract valuable information about the dynamics of the states under consideration, in particular, the coherent oscillations associated with the spin tunneling. It is also shown that an entropy functional constructed out of the discrete Husimi distribution function allows to characterize the spin tunneling.
Application of Finite Elements Method for Structural Analysis in a Coffee Harvester  [PDF]
Evandro Pereira da Silva, Fábio Moreira da Silva, Ricardo Rodrigues Magalh?es
Engineering (ENG) , 2014, DOI: 10.4236/eng.2014.63017

Stress concentration and large displacements are usual problems in the components of the structure of agricultural machinery such harvesters coffee, and that finite element method (FEM) can be a tool to minimize its effects. The goal of this paper is to get results of stresses and displacements of a coffee harvester structure by using FEM for static simulation. The main parts of the coffee harvester analyzed were: engine frame, body right and left sides, front and rear end, main beam, coffee reservoir, wheels and fuel tank. Two different design concepts of a coffee harvester machine were analyzed (structure with rear wheels aligned and misaligned) and the results were compared. It was observed that the model with rear wheels misaligned showed maximum displacement lower than the model with rear wheels aligned. Although higher stress was found in the rear wheels misaligned, it was observed that average stresses for the misaligned wheels design were lower in most structural components analyzed. Based on FEM results, the coffee harvester machine with misaligned rear wheels was built and subjected to operational tests without showing any structural failure.

Fatores de risco para mortalidade fetal em uma maternidade do Sistema único de Saúde, Rio de Janeiro, Brasil: estudo caso-controle
Fonseca, Sandra Costa;Coutinho, Evandro Silva Freire;
Cadernos de Saúde Pública , 2010, DOI: 10.1590/S0102-311X2010000200004
Abstract: stillbirth rate is high in brazil, and it is important to identify its determinants. a nested case-control was conducted to explore the determinants of fetal death in a population treated at public services in rio de janeiro from 2002 to 2004. data were collected from mothers' interviews and medical records. a structured model was proposed to perform statistical analysis, attributing hierarchical levels: socioeconomic factors (distal level), reproductive, behavioral, and healthcare determinants (intermediate level), and fetal biological characteristics (proximal level). according to the findings, work stability, stable marital status, presence of a companion during admission, and adequate prenatal care had a protective effect against fetal death, while domestic violence, maternal morbidity, and intrauterine growth restriction increased the risk. quality of prenatal care showed a large protective effect, thus becoming a key strategy for reducing fetal mortality in populations with low socioeconomic status.
Vulnerability and self-perceived health status among light and heavy smokers: the relationship to short-term fear appeal tobacco control messages
Szklo, André Salem;Coutinho, Evandro Silva Freire;
Cadernos de Saúde Pública , 2009, DOI: 10.1590/S0102-311X2009000700011
Abstract: it is important to stimulate smokers to acquire some level of risk perception associated with their current behavior in order to motivate smoking cessation. the present article attempts to understand how the content of short-term fear appeal government tobacco messages may interact with different levels of daily cigarette consumption in order to affect smokers' vulnerabilities, expressed by self-perceived health status. a poisson model was used to estimate the prevalence ratio of fair or poor self-perceived health status (fphs) according to daily cigarette consumption. we also calculated the proportions of smokers who stated that selected health warning pictures on cigarette packets encourage people to quit smoking, stratified by self-perceived health status and daily cigarette consumption. the proportion of smokers with fphs was 25% higher among those who smoked > 20 cigarettes/day (p = 0.01). among smokers with fphs, heavy smokers showed the highest proportions of responses in favor of selected warning pictures most closely related to losses in ordinary daily living, such as shortness of breath and being bothered by cigarette addiction. short-term loss-framed tobacco control messages seem to have raised awareness of vulnerability among heavier smokers.
Passado, Presente e Futuro
Mesquita Evandro Tinoco,Silva Carlos Eduardo Suaide
Arquivos Brasileiros de Cardiologia , 2004,
Evandro Luiz Lopes,Dirceu da Silva
REMark : Revista Brasileira de Marketing , 2012, DOI: 10.5585/remark.v10i3.2273
Abstract: Um dos temas mais debatidos na área de Marketing é o comportamento do consumidor. N o é de se estranhar o interesse crescente pelo tema, pois a perspectiva mercantilista do Marketing, com foco na transa o, está dando lugar ao que se chamou de Marketing de Relacionamento, cuja orienta o é a manuten o de consumidores a longo prazo. Tendo isto em mente, prop e-se, com este estudo, a elabora o de uma revis o dos principais modelos integrativos do comportamento do consumidor, possibilitando uma reflex o crítica de seus principais fundamentos e de sua evolu o.
Escala de apoio social aplicada a uma popula??o de gestantes: confiabilidade teste-reteste e estrutura de concordancia dos itens
Silva, Kátia Silveira da;Coutinho, Evandro Silva Freire;
Cadernos de Saúde Pública , 2005, DOI: 10.1590/S0102-311X2005000300035
Abstract: there is a growing interest in research on the association between social support and health outcomes. the objective of this study was to evaluate the reliability and structure of agreement of a social support scale. test-retest reliability was measured in a group of pregnant women (n = 65) in a public maternity ward. intraclass correlation coefficient (icc) and quadractically weighted kappa (kw2) were used as agreement measures. log-linear statistical models were fitted to describe patterns of agreement. icc for social support score was 0.90. the kw2 ranged from 0.23 to 0.70. log-linear models that provided the best fit to the data were diagonal agreement plus linear-by-linear association and quasi-independence models. the scale was considered a reliable instrument to measure social support scale in low-income pregnant women.
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