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Search Results: 1 - 10 of 56368 matches for " Samuel da; "
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Globaliza o: sociedade da informa o e trabalho
Samuel da Silva Mattos
Sequência : Estudos Juridicos e Politicos , 2001,
Abstract:
On the Stability of Our Universe  [PDF]
Marcelo Samuel Berman, Newton C. A. da Costa
Journal of Modern Physics (JMP) , 2012, DOI: 10.4236/jmp.2012.329156
Abstract: We argue that the Robertson-Walker’s Universe is a zero-energy stable one, even though it may possess a rotational state besides expansion.
Characterization of the Sexual Self- and Cross-Compatibility in Genotypes of Cacao  [PDF]
Samuel Martins de Jesus Branco, Daniela Viana da Silva, Uilson Vanderlei Lopes, Ronan Xavier Corrêa
American Journal of Plant Sciences (AJPS) , 2018, DOI: 10.4236/ajps.2018.99131
Abstract: Cacao is a tree crop of high economic importance and the subject of several studies aiming the genetic improvement of the species with the incorporation of characteristics that are agronomically important to create superior genotypes. In this context, this study aimed to characterize 22 genotypes of cacao for sexual compatibility, which is a trait that is strongly associated with yield. Additionally, we identify genotypes incompatible with clone TSH-1188 through controlled intercrosses, due to the great importance of this clone in cocoa breeding. Fifteen genotypes were characterized as self-incompatible and other seven as self-compatible, considering the retention index (20%) of self-pollinated flowers. Nine genotypes were characterized for the first time: CCN-16, COCA-3310, COCA-3370/5, EB-1017, IMC-119, IMC-97, LCTEEN-37A, NA-45, and UF-612. Cacao genotypes showed flower retention index ranging from 0.0% to 55.1% after 15 days of self-pollinations. The number of retained flowers varied after self-pollination of cacao genotypes at 1, 5 and 15 days after pollination. CCN-51, Catongo, CCN-10 and P-4B, were the genotypes with minor losses of flowers after 15 days of pollination, while IMC-119 and TSH-516 had 100% of loss of flowers between 1 and 5 days after pollination. Moreover, the flower retention index 15 days after cross-pollination with TSH-1188 ranged from 0.0% to 87.5% among the tested genotypes. The results of cross-pollinations identified two genotypes that are incompatibles, EB-1017 and IMC-119. This result is important for future allelic studies of incompatibility in cacao, because it might indicate that these genotypes share the same self-incompatibility allele(s). We conclude, therefore, that this study enable the characterization of this working collection of cocoa germplasm for sexual compatibility and this information is important for subsequent crosses between cacao genotypes.
Previous Pulmonary Fibrosis in Dermatomyositis/Polymyositis: A Predictive Factor for Pulmonary and Extra-Pulmonary Tuberculosis  [PDF]
Taysa Cristiane Moreira da Silva, Adriana Coracini Tonacio de Proen?a, Samuel Katsuyuki Shinjo
Open Journal of Rheumatology and Autoimmune Diseases (OJRA) , 2018, DOI: 10.4236/ojra.2018.84011
Abstract: Objective: With scant studies in the literature, little is known about the risk factors for tuberculosis in patients with dermatomyositis/polymyositis. Therefore, the aim of the present study was to analyze the predictive factors for tuberculosis development in dermatomyositis/polymyositis. Methods: This single-center, retrospective, cohort study initially included 290 patients with dermatomyositis/polymyositis, from 2002 to 2016. Tuberculosis (pulmonary and/or extra-pulmonary) was confirmed after dermatomyositis/polymyositis diagnosis in 12 patients (4.1%) (Tuberculosis+ group). For the control group (Tuberculosis), 24 patients without tuberculosis were arbitrarily selected in the same period and matched for age, ethnicity, gender, age at disease diagnosis, disease duration and type (dermatomyositis or polymyositis). Results: Tuberculosis occurred for a median of 16 months after dermatomyositis/polymyositis diagnosis. Clinical, laboratory and treatment features were similar in Tuberculosis+ and Tuberculosis groups (P > 0.05). However, previous pulmonary fibrosis in dermatomyositis/polymyositis was more prevalent in the Tuberculosis+ group (41.7 vs. 8.3%; P = 0.029). Moreover, on a multivariate logistic regression model, pulmonary fibrosis was significantly associated with Tuberculosis (Odds ratio: 9.59, 95% confidence interval: 1.17 - 78.82). Tuberculosis affected 3 dermatomyositis cases for every 1 polymyositis case, with predominantly pulmonary followed by extra-pulmonary involvement (pleura, cutaneous, muscular, joint, soft tissue and hematologic). Two or more sites were affected in 41.7% of cases. Conclusions: Previous pulmonary fibrosis in dermatomyositis/polymyositis was a predictive factor associated with tuberculosis development. Further studies are needed to confirm these results.
Active flutter suppression in a 2-D airfoil using linear matrix inequalities techniques
Silva, Samuel da;Lopes Júnior, Vicente;
Journal of the Brazilian Society of Mechanical Sciences and Engineering , 2006, DOI: 10.1590/S1678-58782006000100009
Abstract: flutter is an in-flight vibration of flexible structures caused by energy in the airstream absorbed by the lifting surface. this aeroelastic phenomenon is a problem of considerable interest in the aeronautic industry, because flutter is a potentially destructive instability resulting from an interaction between aerodynamic, inertial, and elastic forces. to overcome this effect, it is possible to use passive or active methodologies, but passive control adds mass to the structure and it is, therefore, undesirable. thus, in this paper, the goal is to use linear matrix inequalities (lmis) techniques to design an active state-feedback control to suppress flutter. due to unmeasurable aerodynamic-lag states, one needs to use a dynamic observer. so, lmis also were applied to design a state-estimator. the simulated model consists of a classical flat plate in a two-dimensional flow. two regulators were designed, the first one is a non-robust design for parametric variation and the second one is a robust control design, both designed by using lmis. the parametric uncertainties are modeled through polytopic uncertainties. the paper concludes with numerical simulations for each controller. the open-loop and closed-loop responses are also compared and the results show the flutter suppression. the perfomance for both controllers are compared and discussed.
Crises convulsivas associadas à hipóxia neonatal e o potencial uso terapêutico do neuropeptídeo NAP =Hypoxia-associated neonatal seizures and potential therapeutic use of neuropeptide NAP
Greggio, Samuel,Costa, Jaderson Costa da
Scientia Medica , 2008,
Abstract: Objetivo: as crises convulsivas neonatais associadas à hipóxia, as bases celulares e moleculares envolvidas neste processo e as evidências experimentais e clínicas da possível utiliza o terapêutica do neuropeptídeo NAP nesta condi o. Fonte de dados: para a capta o dos artigos utilizou- se a base de dados PubMed, inserindo os termos NAP, neonatal seizures e perinatal hypoxia. O critério de sele o de artigos foi a especificidade em rela o ao tema estudado, preferencialmente a partir do ano de 1990. Além disso, foram utilizados também artigos clássicos de anos anteriores que se aplicavam ao propósito desta revis o. Síntese de dados: o risco de apresentar crises convulsivas está aumentado no período neonatal. Existem dificuldades no diagnóstico das crises, eficácia limitada do tratamento e potenciais efeitos adversos, dos anticonvulsivantes utilizados correntemente, no desenvolvimento cerebral dos recém-nascidos. Frente à urgência de novas estratégias para o tratamento das complica es resultantes de crises convulsivas neonatais associadas à hipóxia, o peptídeo NAP torna-se um forte candidato, considerando sua a o neuroprotetora em diversos modelos animais e em ensaios clínicos. Com estudos adicionais, o peptídeo NAP poderá ser empregado como novo agente terapêutico para a preven o da hipóxia cerebral e das seqüelas das crises convulsivas em recémnascidos. Conclus es: apesar dos indícios positivos da aplica o do peptídeo NAP em modelos animais de neuropatologias e de seu sucesso preliminar em ensaios clínicos, s o necessárias pesquisas adicionais a fim de entender particularidades desse composto, tais como mecanismo de a o e viabilidade clínica para o tratamento das crises convulsivas neonatais. Aims: To review clinical aspects, physiopathological data, cellular and molecular processes of hypoxia-associated neonatal seizures, and experimental and clinical evidences for the possible therapeutic use of neuropeptide NAP in this condition. Source of data: A PubMed search was conducted to retrieve studies using the terms NAP, neonatal seizures and perinatal hypoxia. The criterion for article selection was the specificity to the subjects, mainly from 1990 to 2008. Besides, earlier classical studies were also used. Summary of the findings: Risk for seizures is higher during the neonatal period. There are difficulties in seizure diagnosis, limited efficacy of treatment, and potential adverse effects, of currently used anticonvulsants, on the brain development of neonates. Given the necessity of new interventions for the neurological consequences of hypoxia
Active flutter suppression in a 2-D airfoil using linear matrix inequalities techniques
Silva Samuel da,Lopes Júnior Vicente
Journal of the Brazilian Society of Mechanical Sciences and Engineering , 2006,
Abstract: Flutter is an in-flight vibration of flexible structures caused by energy in the airstream absorbed by the lifting surface. This aeroelastic phenomenon is a problem of considerable interest in the aeronautic industry, because flutter is a potentially destructive instability resulting from an interaction between aerodynamic, inertial, and elastic forces. To overcome this effect, it is possible to use passive or active methodologies, but passive control adds mass to the structure and it is, therefore, undesirable. Thus, in this paper, the goal is to use linear matrix inequalities (LMIs) techniques to design an active state-feedback control to suppress flutter. Due to unmeasurable aerodynamic-lag states, one needs to use a dynamic observer. So, LMIs also were applied to design a state-estimator. The simulated model consists of a classical flat plate in a two-dimensional flow. Two regulators were designed, the first one is a non-robust design for parametric variation and the second one is a robust control design, both designed by using LMIs. The parametric uncertainties are modeled through polytopic uncertainties. The paper concludes with numerical simulations for each controller. The open-loop and closed-loop responses are also compared and the results show the flutter suppression. The perfomance for both controllers are compared and discussed.
Um Sistema de Informa o Gerencial para Softhouse
S?nia Maria da Silva Gomes,Samuel Vieira da Silva
Contabilidade Vista & Revista , 2007,
Abstract: Atualmente, as companhias dependem cada vez mais dos servi os de software eprocuram empresas confiáveis e que forne am servi os com qualidade. Por seu lado, as empresasdesenvolvedoras de software têm dificuldades em mensurar seus gastos com desenvolvimentode software, que extrapola a dimens o do esfor o humana-hora. Dentro destecenário, o presente artigo apresenta um sistema de contabilidade por atividades (SCPA) paraa gest o de empresas de servi os em desenvolvimento de software. O modelo apresentadopartiu da realidade de empresas catarinenses de desenvolvimento de software, que fizeramparte dessa pesquisa, tanto como fornecedoras de informa es como avaliadoras do modeloapresentado. O modelo de SCPA apresentado traz três dimens es: subsistema decisório,subsistema operacional e subsistema ciclo contábil, os quais combinados fornecer o informa esque garantam as empresas de desenvolvimento de software o controle gerencialsobre seus custos de desenvolvimento.
CARACTERIZA O DOS RECURSOS HíDRICOS SUBTERR NEOS NO MUNICíPIO DE SANTA ROSA - RS - DOI: 10.7154/RDG.2011.0022.0001
Eduardo Samuel Riffel,Eduardo Samuel Riffel,Jose Luis Silverio da Silva,Jose Luis Silverio da Silva
Revista do Departamento de Geografia , 2011, DOI: 10.7154/rdg.v0i22.131
Abstract: A água é um recurso natural essencial à vida, por isso se faz necessário que se haja um conhecimento amplo sobre sua quantidade e qualidade. Este trabalho apresenta uma análise das águas subterraneas no município de Santa Rosa localizado no estado do Rio Grande do Sul. Tendo como objetivo principal caracterizar os recursos hídricos subterraneos do município através de uma espacializa o cartográfica, realizar uma avalia o das características físico-químicas e hidrodinamicas das águas subterraneas, e cadastrar os po os tubulares na área urbana e rural. Para tanto, utilizou-se para a execu o do estudo, dados pré-existentes na página eletr nica do Sistema de Informa es de águas Subterraneas (SIAGAS), na Prefeitura Municipal de Santa Rosa, e em empresas de perfura o de po os, realizou-se também pesquisa de campo com o uso do “Global Position System” (GPS) e técnicas computacionais. Para caracterizar as águas subterraneas, fez-se a análise de parametros físico-químicos em amostras coletadas em campo. Como resultado mais relevante desta pesquisa tem-se o cadastro dos po os tubulares para um possível monitoramento e a gera o de diversos mapas indicando a espacializa o da qualidade da água. Desta forma, esse estudo contribuirá para o planejamento adequado do município de Santa Rosa-RS trazendo subsídios aos órg os gestores e à sociedade. ANALYSIS OF GROUDWATER RESOURCES IN THE MUNICIPALITY OF SANTA ROSA – RS Abstract: Water is a natural resource essential to life, so it is necessary that there is a broad knowledge about their quantity and quality. This paper presents an analysis of groundwater in the Santa Rosa state Southern Brazil. Its main goal is to characterize the groundwater resources of the municipality through a spatial map, conduct an assessment of the physico-chemical and hydrodynamic groundwater. Were registered their wells in urban and rural areas. Were used to carrying out the study, pre-existing data on the website of the Groundwater Information System (SIAGAS), the prefecture of City of Santa Rosa. Were executed contacts with the companies well drilling and was carried out also field research with the use of Global Position System (GPS) and computational techniques. To characterize the groundwater, was executed the analysis of physical and chemical parameters in samples collected in the field. As most relevant result of this research has been the registration the position wells for a possible monitoring and generation of several maps showing the spatial distribution of water quality. Thus, this study will contribute to the proper plannin
Taxa de mortalidade por acidentes de trasito e frota de veículos
Kilsztajn Samuel,Silva César Roberto Leite da,Silva Dorivaldo Francisco da,Michelin André da Cunha
Revista de Saúde Pública , 2001,
Abstract: OBJETIVO: A taxa de mortalidade específica por acidentes de transito de veículos a motor é usualmente utilizada para efeito das políticas de saúde pública. Para mensurar o grau de violência no transito, foi realizado estudo com o objetivo de analisar o número de óbitos por acidentes de transito por veículo a motor. MéTODOS: Com base nos dados sobre frota de veículos, popula o e óbitos por acidente de transito, publicados no Statiscal Yearbook (1999), Demografic Yearbook (1997), Denatran (1999), Ministério da Saúde (2000) e Funda o IBGE (2000), foram estudados 61 países e 51 localidades brasileiras.A taxa de mortalidade específica foi decomposta em número de veículos por habitante e número de óbitos por veículo. Numa primeira aproxima o, cada uma das amostras (internacional e brasileira) foi subdividida em três grupos, de acordo com o número de veículos por habitante, para estudo da rela o entre os três índices. Para testar a significancia dessa rela o, foi estimada uma fun o de regress o log-linear. RESULTADOS: Os resultados para as estimativas internacionais, assim como as do Brasil, demonstraram que, quanto maior o número de veículos por habitante, menor o número de óbitos por acidentes de transito por veículo, tendo-se elasticidade da ordem de -1,067, para as estimativas internacionais, e de -0,515, para as do Brasil. CONCLUS ES: Para uma política de preven o dos acidentes de transito, os resultados encontrados indicam a necessidade de estudar os fatores que possam explicar o maior número de óbitos por veículo nas regi es com menor número de veículos por habitante.
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