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Search Results: 1 - 10 of 77016 matches for " Homero Neves da Silva "
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Avalia o financeira dos mecanismos de concess o com prazo variável
Homero Neves da Silva,Fernando Dutra Michel,Luiz Afonso dos Santos Senna,Antonio Nú?ez
Transportes , 2009,
Abstract: Este trabalho é devotado à avalia o do risco de tráfego em concess es de infra-estruturas rodoviárias. Dentre os principais meios encontrados para minimizar os efeitos do risco de tráfego aos concessionários encontra-se a utiliza o de mecanismos de concess o baseado em contratos com prazo variável. Dois mecanismos têm sido desenvolvidos com este objetivo e foram avaliados neste trabalho: LPVR, proposto por Engel, Fischer e Galetovic e implantado no Chile em meados da década de 1990; e LPVNR, proposto por Nombela e de Rus a partir do final da mesma década. A avalia o dos mecanismos foi realizada utilizando simula o Monte Carlo. Para a realiza o da avalia o, foi desenvolvido um modelo financeiro que propiciasse análises de projetos com dura o n o definida exante. As variáveis utilizadas nos testes foram: as taxas de desconto utilizadas nos projetos; os horizontes de tempo das concess es (dura o esperada); e a extens o máxima que a dura o pode ter, além da dura o esperada.
Notas para uma genealogia da Psicologia Social
Silva, Rosane Neves da;
Psicologia & Sociedade , 2004, DOI: 10.1590/S0102-71822004000200003
Abstract: the "denaturalization" of the concept "social" allow us to situate the conditions to the invention of social psychology. using the genealogy strategy, our goal is to show that it is not psychology that explains the "social" but it is the "social" itself that explains the emergence of modern psychology. in order to attain our goal it is necessary to abandon the use of social as a synonym of sociability and to consider the "social" as a product essentially constructed by determinate human practices. this strategy allows us to understand how, at the end of the xix century, modern psychology's firsts theoretical approaches towards the "social" were produced from matters related to the phenomena of the masses.
Isquemia hepática normotérmica em ratos: estudo da les?o celular através do uso de clampeamento pedicular contínuo e intermitente
Silva, Fabio Neves da;
Revista do Colégio Brasileiro de Cirurgi?es , 2002, DOI: 10.1590/S0100-69912002000600007
Abstract: background: our objective was to access the biochemical alterations due to hepatic warm ischemia followed by reperfusion in two modalities of portal triad clamping in rats. method: we divided thirty male wistar rats, weighting between 250 and 320 grams into three groups with 10 animals each. forty minutes of hepatic ischemia was induced by continuous (group i) or intermittent (group ii) clamping. no clamping was used in control group. as a parameter of hepatocelular injury, plasma concentrations of glutamic oxaloacetic transaminase (got), glutamic pyruvic transaminase (gpt) and lactate dehydrogenase (ldh) were measured. blood specimens were obtained at the begining (t1) and at the end of the surgery (t2). all animals had the same operative time, 60 minutes. results: there was not statistic difference between baseline (t1) values of the three enzymes in all groups. all animals showed significant increases of all enzymes from moment 1 (t1) to moment 2 (t2). there was statistical difference in the mean increase of got and gpt between the three groups, but the greatest elevation was found in group i and the lowest, in control group. in ldh analysis, there was not significant difference between group ii and control group. group i, however, showed significant increases compared with the other two. conclusion: compared with the continuous clamping, to a total ischemic period of 40 minutes, intermittent portal triad clamping, in rats, with 10/5 minutes ischemia/reperfusion cycles, leads to a lesser hepatocelular damage, verified by the lowest enzymatic values.
Igreja Católica, assistência social e caridade: aproxima??es e divergências
Silva, Claudia Neves da;
Sociologias , 2006, DOI: 10.1590/S1517-45222006000100012
Abstract: this article is the result of a research study concluded in 2003, which aimed at investigating how the conception of law is expressed in the actions of the so-called social pastoral commissions of the catholic church in londrina, brazil. by observing that the conception of charity and that of social rights walk side-bi-side within the catholic church, a question emerged: how is the conception of social right expressed in the actions of social pastoral commissions? charity is preached as a christian duty, as an action expressed in the experience of solidarity towards others who are in a situation that prevents them from having minimal living conditions. at least at discourse level, the actions developed are not limited to provide basic goods, clothes or medicine. we realized that those who act in social pastoral commissions, driven by values such as love to fellow human beings and solidarity, have not lost sight of the idea of social right - on the contrary, they have been reinforcing it.
Social services and charity: convergence and divergence Assistência social e caridade: convergências e divergências
Claudia Neves da Silva
Semina : Ciências Sociais e Humanas , 2009, DOI: 10.5433/
Abstract: This article is the result of a research conducted in 2003, with the purpose of investigating how the concept of rights in the Catholic Church social pastorals in Londrina is expressed. Assuming that the concept of charity and social rights stand side by side inside the Church, a question arises: how the social rights concept expresses itself in the different social pastorals and which are its repercussions in the social services policy. Este artigo resulta de uma pesquisa concluída em 2003 e teve por objetivo investigar como se expressa a concep o de direito nas a es das pastorais sociais da Igreja Católica de Londrina. Diante da verifica o de que a concep o de caridade e de direitos sociais caminha lado a lado no interior da Igreja, uma indaga o surgiu: como a concep o de direito social se expressa nas diferentes pastorais sociais e suas repercuss es na política de assistência social.
The presence of thomist postulates in the origin of social work A presen a de postulados tomistas na gênese do servi o social
Cláudia Neves da Silva
Semina : Ciências Sociais e Humanas , 2003, DOI: 10.5433/
Abstract: This article highlights the presence of Saint Thomas de Aquino’s postulates at the beginning of the Social Work and its influence in the theory and professional practice of the first social workers. For that matter, it is based on written articles from Revista Servi o Social, which was greatly disseminated among social workers between 1939 and 1952. O presente artigo tem por objetivo estudar a presen a de postulados de Santo Tomás de Aquino no surgimento do servi o social e sua repercuss o na teoria e na prática profissional das primeiras profissionais da área de servi o social. Para tanto, utilizamo-nos de artigos escritos para a Revista Servi o Social, que teve grande circula o entre assistentes sociais no período de 1939 a 1952.
Evolution of the Brazilian Electric Generation System and Its Exergetic Efficiency-Relations with Economics, Reviews and Projections  [PDF]
Marcus Vinicius da Silva Neves
Open Access Library Journal (OALib Journal) , 2018, DOI: 10.4236/oalib.1104135
Abstract:
In general, historically, Brazil is a country that does not develop a robust master plan for various areas responsible for supporting its development. As for the themes: education, transport, logistics, tourism, among others, the national infrastructure, in which the generation of electricity is a main character, does not have a strong planning and is pursued firmly that its actions come true. In addition, there is no clear driver for the system to seek in order to become more sustainable, reducing the economic, environmental and social impacts from the conversion of the energy potential of natural resources (renewable or not) into energy for society. The capacity of electric power generation is strategic for any country; it drives its economy and consequently its economic growth and increases the quality of life of its population. However, a robust planning is required to optimize the economics of electricity generation facilities in order to always meet the demand, without any significant spare capacity. Additionally, it is necessary to balance and evaluate the options available, so as to have a generating capacity which fulfills in addition to economic benefits, greater energy efficiency and reduced environmental impact, in order to allow the model to be sustainable. Thus, this paper presents the history and projections of population growth, evolution of GDP (Gross Domestic Product) correlated with the consumption and generation of electricity, as well as performs a calculation of the exergetic efficiency of Brazil’s generating capacity for the production of direct correlations with its economic ability and associated environmental impacts, including the likely projections, providing means for reflection on the possibilities of planning and drivers for the future as well.
COLHEITA DIRETA DE FEIJ O COM COLHEDORA AUTOMOTRIZ AXIAL DRY BEAN HARVEST WITH AXIAL THRASHER COMBINE
José Geraldo da Silva,Homero Aidar,Jo?o Kluthcouski
Pesquisa Agropecuária Tropical , 2009, DOI: 10.5216/pat.v39i4.6640
Abstract: A colheita mecanizada do feijoeiro é uma prática comum em lavouras de médio e grande porte, embora diversos fatores dificultem o emprego de colhedoras automotrizes. Ela requer cuidados especiais, porque muitas vagens situam-se próximas ao solo, causando perda significativa de gr os na opera o. Foi instalado um experimento para avaliar a colheita do feij o, feita por colhedora automotriz provida de plataforma de corte flexível e sistema de trilha axial. Os fatores estudados foram: duas cultivares de feij o (BRS Valente e Iapar 81), dois períodos de realiza o da colheita (manh e tarde) e três velocidades de opera o (3 km h-1, 5 km h-1 e 7 km h-1). A altura média de corte das plantas foi de 93 mm e a perda de gr os de 135 kg ha-1. Esta perda foi maior no período da tarde do que de manh . A velocidade de colheita afetou tanto a altura de corte das plantas quanto a perda de gr os. A danifica o aos gr os foi influenciada pela velocidade de opera o no campo e pelo teor de umidade dos gr os. O desempenho da colhedora, em termos de capacidade de trabalho e de qualidade e perda de gr os, dependeu da velocidade de opera o, da cultivar e do estádio de matura o. PALAVRAS-CHAVE: Perda de gr os; qualidade de gr os; velocidade de opera o; período de colheita; cultivar de feij o. Dry bean mechanized harvest is a common practice in large and medium farms. However, many factors have made difficult the use of combines. Mechanized harvest requires special care because many pods are near the ground, causing significant grain losses. It was set up an experiment to evaluate the dry bean harvest by a combine equipped with flexible cutting platform and axial thrasher. The factors studied were: two dry bean cultivars (BRS Valente and Iapar 81), two harvest periods (morning and afternoon), and three operation speeds (3 km h-1, 5 km h-1, and 7 km h-1). Harvest plant height and grain loss were 93 mm and 135 kg ha-1, respectively. This grain loss was higher in the afternoon than in the morning. The combine speed operation affected plant cut height as well as grain loss. The grain damage was affected by combine operation speed and grain moist
Yield, Water Use Efficiency and Physiological Characteristic of “Tommy Atkins” Mango under Partial Rootzone Drying Irrigation System  [PDF]
Marcelo Rocha dos Santos, Breno Rosa Neves, Bismarc Lopes da Silva, Sérgio Luiz Rodrigues Donato
Journal of Water Resource and Protection (JWARP) , 2015, DOI: 10.4236/jwarp.2015.713084
Abstract: This study was conducted to evaluate the yield, water use efficiency and physiologic characteristics of “Tommy Atkins” mango under partial rootzone drying. The experiment was carried out in an orchard of mango in the irrigated perimeter of Ceraíma, BA. Five treatments and six repetitions were used with one tree per experimental plot: 01—Full Irrigation, 100% of ETc, 02—100% of ETc with frequency of alternance (FA) of 15 days, 03—80% ETc with FA of 15 days, 04—60% of ETc with FA of 15 days, 05—40% ETc with FA of 15 days. The treatments were conductedfrom the beginning of flowering to the harvest of mango in an orchard irrigated by drip. There was no significant reduction in productivity of “Tommy Atkins” mango under PRD up to 40% of ETc and PRD with 40% ETc resulted in greater water use efficiency. There was no significant difference among the averages of photosynthetically active radiation, Qleaf; leaf temperature, Tl; internal CO2 concentration, Ci; transpiration, E; stomatal conductance, gs; photosynthesis, A; carboxylation efficiency, A/Ci; quantum efficiency of photosynthesis, A/Qleaf and instantaneous water use efficiency, A/E between full irrigation and PRD with different water depth. The increase in leaf temperature causes reduction in A/Qleaf and A/E, however, it increases the transpiration. Increased gs results in higher rates of E, A and A/Ci. The use of the PRD with 40% of ETc causes no interference in gas exchange, maintains the yield and increases water use efficiency in “Tommy Atkins” mango tree.
Physiological Conditioning of Alibertia edulis (Rich) Seeds  [PDF]
Tathiana Elisa Masetto, Eliane Marques da Silva Neves, Silvana de Paula Quint?o Scalon
American Journal of Plant Sciences (AJPS) , 2018, DOI: 10.4236/ajps.2018.95077
Abstract: Physiological conditioning of seeds has been shown to increase the uniformity of seedlings; thus, it has been useful for propagating native tree species from the Brazilian Cerrado which, otherwise, are difficult to propagate successfully. The objective of this work was to evaluate the effect of physiological conditioning of Alibertia edulis seeds by soaking for 5 or 10 days in solutions of varying osmotic potential. After conditioning, seeds were dried down to original water content, sown on sheets of germitest paper inside gerbox plastic boxes, and incubated at 25°C. We evaluated the effect of conditioning by studying seed germination and vigor. Seed conditioning by osmotic pretreatment showed positive effects; however, germination and growth of seedlings from seeds conditioned at osmotic potentials of -0.3 to -0.7 MPa were reduced. Osmoconditioning for 10 days at -0.7 MPa resulted in increased percent germination, indicating that the longest imbibition period in the osmotic solution of the lowest osmotic potential (-1.3 MPa) favored the seed germination process. A. edulis seeds did not require conditioning to attain high germination rates; nonetheless, osmotic conditioning reduced average seed-germination time.
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