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Search Results: 1 - 10 of 229002 matches for " R. Fonseca "
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Keynes’ Analytical System as an Econometric Tool: Examining Macroeconomic Trends in the U.S. from 1950s to 1980s  [PDF]
Manuel A. R. Da Fonseca
Theoretical Economics Letters (TEL) , 2018, DOI: 10.4236/tel.2018.810112
Abstract: The initial goal of this paper is to develop the standard Keynes’ analytical system into a dynamic macro-econometric model, which is then applied to the analysis of macroeconomic indicators for the U.S. from 1950s to 1980s—a period marked by strong volatility of inflation, exchange rates and commodity prices. Based on the results obtained and, in particular, on the model’s structure and exogenous variables, it is possible to single out the main factors that explain the macro-trends observed in the American economy. Further, a second and more important goal is to evaluate if a simple macro-dynamic model can be a relevant tool in empirical analysis of macroeconomic developments. The results obtained indicate that, although the elements of the Keynesian system are most often used in a purely theoretical perspective, a macro-econometric model based on those elements can be successfully used in reproducing overall macroeconomic variables in a certain period—and the determinants of those macro-trends can be traced to the model’s exogenous variables.
La Revista Cubana de Medicina Militar The Cuban Journal of Military Medicine
CARLOS R QUEVEDO FONSECA
Revista Cubana de Medicina Militar , 2013,
Abstract:
THE APPLICATION OF MIXTURE MODELING AND INFORMATION CRITERIA FOR DISCOVERING PATTERNS OF CORONARY HEART DISEASE
Jaime R. S. FONSECA
Journal of Applied Quantitative Methods , 2008,
Abstract: This paper’s purpose is twofold: first it addresses the adequacy of some theoretical information criteria when using finite mixture modelling (unsupervised learning) on discovering patterns in continuous data; second, we aim to apply these models and BIC to discover patterns of coronary heart disease. In order to select among several information criteria, which may support the selection of the correct number of clusters, we conduct a simulation study, in order to determine which information criteria are more appropriate for mixture model selection when considering data sets with only continuous clustering base variables. As a result, the criterion BIC shows a better performance, that is, it indicates the correct number of the simulated cluster structures more often. When applied to discover patterns of Coronary Heart Disease, it performed well, discovering the known pattern of data.
A casual cantharophily: The meeting between Astylus variegatus (Coleoptera: Myleridae) and Oxypetalum banksii (Apocynaceae: Asclepiadoideae)
Vieira, Milene,Fonseca, Rúbia
Journal of Pollination Ecology , 2011,
Abstract: Cantharophily is reported for the first time in a Brazilian asclepiad, involving the mylerid Astylus variegatus and the nectariferous flowers of Oxypetalum banksii, a plant mainly pollinated by wasps. The use of nectar as food by A. variegatus, considered pollinivorous and granivorous, is also novel. The mutual interaction described here is an example of a plant-pollinator interaction with generalist insects visiting a plant with a specialized pollination system. It’s also temporary and occasional and, therefore, is often overlooked in studies of plant-pollinator interactions. In this study, we found that the casual meeting between O. banksii and A. variegatus was a key event for the reproduction of both.
Animal models for human contiguous gene syndromes and other genomic disorders
Walz, Katherina;Fonseca, Patricia;Lupski, James R.;
Genetics and Molecular Biology , 2004, DOI: 10.1590/S1415-47572004000300001
Abstract: genomic disorders refer to a group of syndromes caused by dna rearrangements, such as deletions and duplications, which result in an alteration of normal gene dosage. the chromosomal rearrangements are usually relatively small and often difficult to detect cytogenetically. in a subset of such conditions the rearrangements comprise multiple unrelated contiguous genes that are physically linked and thus have been referred to as contiguous gene syndromes (cgs). in general, each syndrome presents a complex clinical phenotype that has been attributed generally to dosage sensitive gene(s) present in the responsible chromosomal interval. a common mechanism for cgs resulting from interstitial deletion/duplication has recently been elucidated. the dna rearrangements result from nonallelic homologous recombination (nahr) utilizing flanking low-copy repeats (lcrs) as recombination substrates. the resulting rearrangements often involve the same genomic region, a common deletion or duplication, making it difficult to assign a specific phenotype or endophenotype to a single responsible gene. the human and mouse genome sequencing projects, in conjunction with the ability to engineer mouse chromosome rearrangements, have enabled the production of mouse models for cgs and genomic disorders. in this review we present an overview of different techniques utilized to generate mouse models for selected genomic disorders. these models foment novel insights into the specific genes that convey the phenotype by dosage and/or position effects and provide opportunities to explore therapeutic options.
Avalia??o energética e de desempenho de frangos com aquecimento automático a gás e a lenha
Funck, Sandro R.;Fonseca, Ricardo A.;
Revista Brasileira de Engenharia Agrícola e Ambiental , 2008, DOI: 10.1590/S1415-43662008000100014
Abstract: in this research automatic infra-red gas heating and wood-burning were analyzed, with three lineages of broilers raised from may 1, 2005 to june 16, 2005 in 1200 m2 poultry houses, and slaughtered at the age of 45 days. the energetic consumptions and costs were evaluated for each system, as well as the following zootechnical indexes: mean weight, mortality, feed conversion and consumption. the experimental design was completely randomized in a factorial 2 x 3 model, made up by two heating systems, three lineages of male broilers and six treatments and six replications, totaling thirty six poultry houses with 13,300 birds each. for the statistical analysis the sisvar 4.6 program was utilized and the comparisons of means were done using the tukey test. the results obtained were as follows: the energy consumption for wood was 173.21 gj per lot and the cost was r$ 3.23 gj per lot, and for gas it was 20.26 gj per lot with a cost r$ 53.78 gj per lot. in relation to the zootechnical performance, there were no significant differences between the two systems, but for the lineages significant difference was observed. the cobb lineage had a 6.62% higher mean weight and 1.04% higher mortality when compared to the ross 1 lineage.
Avalia o, pela ressonancia magnética, da resposta quimioterápica neoadjuvante no cancer de mama localmente avan ado
Rêgo Salete de Jesus Fonseca
Radiologia Brasileira , 2001,
Abstract:
World’s Fairs and Latin American Archaeology: Costa Rica at the 1892 Madrid Exposition
David R. Watters,Oscar Fonseca Zamora
Bulletin of the History of Archaeology , 2005, DOI: 10.5334/bha.15102
Abstract: The growth of anthropology in Europe and the Americas in the latter nineteenth and early twentieth centuries coincided with the heyday of world’s fairs, international exhibitions, exposiciones internacionales, and expositions universelles (Allwood 1977:7–12, Findling and Pelle 1990:xv–xix, and Rydell 1992:1–10 discuss terminology). Indeed, certain world’s fairs served to popularize “anthropology,” acquainting the public with this unfamiliar term and apprising scholarly audiences of the concepts and principles of this emerging discipline. Mason’s (1890) article notifying his colleagues in North America about the wide range of anthropological topics embraced by the Exposition universelle internationale de 1889 à Paris is an early example of this link.
Faddeev equation approach for three-cluster nuclear reactions
A. Deltuva,A. C. Fonseca,R. Lazauskas
Physics , 2012,
Abstract: In this lecture we aim to present a formalism based on Faddeev-like equations for describing nuclear three-cluster reactions that include elastic, transfer and breakup channels. Two different techniques based on momentum-space and configuration-space representations are explained in detail. An important new feature of these methods is the possibility to account for the repulsive Coulomb interaction between two of the three clusters in all channels. Comparison with previous calculations based on approximate methods used in nuclear reaction theory is also discussed.
New Actors on Stage: Analysis of the Emergent Forms of Collective Action in the European Context  [PDF]
Dora Fonseca
Open Journal of Social Sciences (JSS) , 2014, DOI: 10.4236/jss.2014.21005
Abstract: In this article our focus will be on civil society’s responses triggered by the imposition of the societies of austerity. The analysis will be centred on an emerging collective actor, the indignados, and on the conditions that fostered its formation and processes involved in the construction of its identity. To accomplish this task, we retrieved Ernesto Laclau’s political logic of populism and the concept of political developed by Chantal Mouffe and applied them to the formation of the indignados’ identity. This process is conceived in terms of the construction of antagonistic frontiers which divide the social into two opposing fields. This conception allows us to develop an analysis based on the notion of social conflict, as well as a reflection on the potentialities embodied by this new social actor, despite their presentation by the dominant discourse as utopic and therefore impossible. In this proposal, it is our aim to provide a better understanding of what is at stake when we talk about the indignados and a clearer perception of the political dimension of both struggle and resistance.
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