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Fitomassa de adubos verdes e cobertura do solo na regi o do Alto Vale do Jequitinhonha, Minas Gerais = Biomass of green manure and soil cover in the region of Vale do Jequitinhonha, Minas Gerais-Brazil.
Gustavo Ant?nio Mendes Pereira,Daniel Valad?o Silva,Renan Rodrigues Braga,Felipe Paolinelli de Carvalho
Agro@mbiente On-line , 2012,
Abstract: A aduba o verde constitui prática cultural de relevante impacto positivo em sistemas de produ o agrícola que visam o uso sustentável da terra. Objetivou-se com esse trabalho avaliar o desempenho de seis leguminosas utilizadas para aduba o verde, quanto à produtividade de fitomassa, cobertura do solo e uso da radia o fotossinteticamente ativa na regi o conhecida como Alto Vale do Jequitinhonha em Minas Gerais. O experimento foi conduzido entre os meses de mar o a outubro de 2010, em delineamento em blocos casualizados com quatro repeti es. Os adubos verdes utilizados foram: crotalária (Crotalariaspectabilis), feij o-de-porco (Canavalia ensiformis), feij o-guandu-an o (Cajanus cajan), lab-lab (Lablab purpureus), mucuna-an (Mucuna deenringiana) e tremo o-branco (Lupinus albus L.). Os adubos verdes apresentaram elevadas produ es de fitomassa, mas com diferentes picos de cobertura do solo e intercepta o da radia o. Os maiores acúmulos de matéria seca e fresca foram observados pela crotalária seguido pelo feij o-guandu-an o. Entre as espécies estudadas, o feij o-de-porco é aque apresentou maior período vegetativo, representando elevado potencial para recobrimento do solo, destacando-se também na intercepta o de radia o fotossinteticamente ativa.Green manuring is a positive practice that reduces the impact on agricultural production systems aimed at sustainable land use. The objective of this study was to evaluate the performance of six legumes used for green manure, the productivity of biomass, land cover and use of photosynthetic active radiation in the region of the Vale do Jequitinhonha, Minas Gerais, Brazil. The experiment was conducted during March to October, 2010 in randomized block design with four replications. Green manures were used: Crotalaria spectabilis, Canavalia ensiformis, Cajanus cajan, Lablab purpureus, Mucuna deenringiana and Lupinus albus. Green manures had high yields of biomass, however, different peaks of ground cover and radiation interception were observed. The largest accumulations of dry and fresh matter were observed in C. spectabilis followed by C. cajan. Amongthe species studied, C. ensiformis has a larger growing season, representing great potential for soil covering, and is importantfor the interception of photosynthetically active radiation.
Ocorrência de plantas daninhas no sistema lavoura-pecuária em fun??o de sistemas de cultivo e corretivo de acidez
Braga, Renan Rodrigues;Cury, Jo?o Pedro;Santos, Jose Barbosa dos;Byrro, Eliza Catharina Mota;Silva, Daniel Valad?o;Carvalho, Felipe Paolinelli de;Ribeiro, Karina Guimar?es;
Revista Ceres , 2012, DOI: 10.1590/S0034-737X2012000500010
Abstract: studies on the interaction among weeds, crops and planting systems can provide new systems of pasture introduction, recovering, and renovation. this research aimed to study weed phytosociology in pasture implanted in the fallow cropping. considering the need of liming application, the treatments followed the combination of two planting systems (no-tillage and plowing followed by harrowing) and four soil ph adjustment levels (0, 1/3, 1/2 and 1 time of the recommendation). it was observed that sida species showed higher importance value indexes in all treatments. sida urens and sida rhombifolia were the most representative. importance value indexes of plants from the genus sida were increased with corrective rates, showing maximum values with half of recommended lime rate, with posterior decrease. besides grasses and forage legumes which can benefit the system, other species toxic to animals occurred. perennial grasses showed higher importance value index under conventional planting than in no-tillage system, making possible the use of specific herbicides in conventional system. comparing no-tillage and conventional systems, the similarity index was 81.1%, which is considered high. in general, conventional planting system showed even higher weed density than no-tillage in the implementation of the integration system .
A critical review of the possible benefits associated with homeopathic medicine
Almeida, Renan Moritz V. Rodrigues;
Revista do Hospital das Clínicas , 2003, DOI: 10.1590/S0041-87812003000600007
Abstract: objective: to evaluate the recent scientific research progress on homeopathy. methodology: homeopathy was evaluated in terms of its clinical research; in vitro research, and physical foundations. the medline database was the main reference source for the present research, concerning data of approximately the last 10 years. secondary references (not available in this database) were obtained by means of direct requests to authors listed in the primary references. results: clinical studies and in vitro research indicate the inefficacy of homeopathy. some few studies with positive results are questionable because of problems with the quality and lack of appropriate experimental controls in these studies. the most recent meta-analyses on the topic yielded negative results. one of the few previous meta-analyses with positive results had serious publication bias problems, and its results were later substantially reconsidered by the main authors. the sparse in vitro homeopathic research with positive results has not been replicated by independent researchers, had serious methodological flaws, or when replicated, did not confirm the initial positive results. a plausible mechanism for homeopathic action is still nonexistent, and its formulation, by now, seems highly unlikely. conclusions: as a result of the recent scientific research on homeopathy, it can be concluded that ample evidence exists to show that the homeopathic therapy is not scientifically justifiable.
A critical review of the possible benefits associated with homeopathic medicine
Almeida Renan Moritz V. Rodrigues
Revista do Hospital das Clínicas , 2003,
Abstract: OBJECTIVE: To evaluate the recent scientific research progress on homeopathy. METHODOLOGY: Homeopathy was evaluated in terms of its clinical research; in vitro research, and physical foundations. The Medline database was the main reference source for the present research, concerning data of approximately the last 10 years. Secondary references (not available in this database) were obtained by means of direct requests to authors listed in the primary references. RESULTS: Clinical studies and in vitro research indicate the inefficacy of homeopathy. Some few studies with positive results are questionable because of problems with the quality and lack of appropriate experimental controls in these studies. The most recent meta-analyses on the topic yielded negative results. One of the few previous meta-analyses with positive results had serious publication bias problems, and its results were later substantially reconsidered by the main authors. The sparse in vitro homeopathic research with positive results has not been replicated by independent researchers, had serious methodological flaws, or when replicated, did not confirm the initial positive results. A plausible mechanism for homeopathic action is still nonexistent, and its formulation, by now, seems highly unlikely. CONCLUSIONS: As a result of the recent scientific research on homeopathy, it can be concluded that ample evidence exists to show that the homeopathic therapy is not scientifically justifiable.
Cultura corporativa e identidade: desinstitucionaliza??o em empresa de telecomunica??es brasileira
Rodrigues, Suzana Braga;
Revista de Administra??o Contemporanea , 1997, DOI: 10.1590/S1415-65551997000200004
Abstract: this paper discusses an ethnographic study drawn from biographical documents, and interviews with managers and engineers in a telecomunications company. it argues that though a corporate culture is designed to generate meanings for identity and integration around corporate values, it can, paradoxically, create employee's distancing and foster the division of the organization into subcultures. it suggests that culture, power and identity are also closely interrelated in the sense that they nurture meanings for each other. an organizational culture, by re-affirming the values and ideologies which give distinction to a group as regard to "others", also constructs the legitimate basis of the group's power. on the other hand, when employees feel that the organization cannot fulfil their professional expectations or if managers' values threaten their self-concept, not only do they refuse to reinforce the meanings embedded in the corporative philosophy, but they may try to undermine its principles by articulating opposition groups.
Constructing alternatives for social inclusion in Education for Youth and Adults
Francisca Karoline Rodrigues Braga
Via Litterae , 2011,
Abstract: Brazilian society, as is formed today, is made up from contributions of various social and cultural aspect that reveals the diversity of cultural and constitute the nation. However, this process of constitution of the country, several subjects were subjected to marginalization and exclusion of rights to decent living conditions for every human being, including access to the school and the benefits resulting therefrom. In this sense, the institution school emerges as a space of possibilities of redemption of the right to knowledge related to the use of reading and writing as goods relevant to the enjoyment of present, especially in the form of youth and adults. Therefore, we will consider the contributions of the educational activity schooled, developed with the subjects to attend EJA (Education for Youth and Adult). For this, we will enforce the theoris developed by Kleiman (1995), Santiago (2000), Souza (2000), which discuss and theoriza about the role of popular education and social practices od use of reading Written and developed by the school in the context of current society.
O pensamento sonoro-visual de Walter Ruttmann e a música de Berlim: sinfonia de uma metrópole (1927)
Claudiney Rodrigues Carrasco,Renan Paiva Chaves
Doc On-Line : Revista Digital de Cinema Documentário , 2012,
Abstract: This paper discusses the original music score composed for the film Berlin: Symphony of a Metropolis (1927), directed by Walter Ruttmann (1887-1941). We try to understand the film's sound/music conception and its relations with Ruttmann's sound conception revealed in his texts. Our central objective is to observe and analyse the music of the silent documentary film and its theory, based on Ruttmann’s film and texts and the original score composed by Edmund Meisel.
CONSUMO EXTRA DE OXIGêNIO APóS EXERCíCIOS AQUáTICOS, EM CICLOERGOMETRO E DE RESISTêNCIA
Renan Marcondes Porto,Jair Rodrigues Garcia Junior
Colloquium Vitae , 2011, DOI: 10.5747/cv.2011.v03.n2.v052
Abstract: The excess of post-exercise oxygen consumption (EPOC) represents an energy expenditure added to exercise′s energy expenditure, so, it was been measured by hours after practice of different exercises. The aim of this study was to review, describe, compair and discuss EPOC resulting of water, cycle ergometer and resistance exercises practice. It was carried out a search by papers on index basis, selecting mainly these ones published after 2006. It was observed several factors that take effects on EPOC, mainly exercise intensity and duration. Exercise intensity on 70% of VO2 máx. and duration of 60 min induces the higher effects on EPOC. Duration of EPOC can be extend by 2 h until 48 h and the oxygen consumption can be reach 23 L or 114 Kcal, after resistance exercise. On cycle ergometer with intensity of 60% of VO2 máx. and duration of 20 min, average EPOC on first 16 min of recovery is 2.9 L/min. As the intensity and duration show large variation on studied exercises, it is difficult the comparision, however, the results indicated that EPOC is higher on water exercises, followed by cycle ergometer and resistance exercises. Thus, it is concluded that EPOC is influenced by several factors, mainly exercise type, intensity and duration. These two last ones can make EPOC represent additional oxygen consumption as 10-20% to oxygen consuption during exercise.
Building social capital for internationalization
Rodrigues, Suzana Braga;Child, John;
Revista de Administra??o Contemporanea , 2012, DOI: 10.1590/S1415-65552012000100003
Abstract: social capital may be defined as social relationships that confer actual or potential benefits. it can therefore be understood as a particular type of resource. recent research has drawn attention to how connections and relationships (networking) both at home and abroad can be crucially important for small and medium-sized enterprises (smes) seeking to export or invest abroad. however, relatively little is known about how smes initiate, develop and maintain network relationships. this paper reports a study of 32 british smes exporting, or attempting to export, to brazil and of domestic institutional agencies whose role was to facilitate business conducted between british and brazilian smes. the study explored both the functions of social capital for the smes and the process whereby it was developed. its findings confirm the value of social capital in international entrepreneurship. it can provide information, interpretation, market opportunities, and some degree of protection against the risks associated with foreignness, newness and smallness. the study also confirms the vital importance of personal trust in sustaining social capital between small firms.
Building Social Capital for Internationalization
Suzana Braga Rodrigues,John Child
Revista de Administra??o Contemporanea , 2012,
Abstract: Social capital may be defined as social relationships that confer actual or potential benefits. It can therefore beunderstood as a particular type of resource. Recent research has drawn attention to how connections andrelationships (networking) both at home and abroad can be crucially important for small and medium-sizedenterprises (SMEs) seeking to export or invest abroad. However, relatively little is known about how SMEsinitiate, develop and maintain network relationships. This paper reports a study of 32 British SMEs exporting, orattempting to export, to Brazil and of domestic institutional agencies whose role was to facilitate businessconducted between British and Brazilian SMEs. The study explored both the functions of social capital for theSMEs and the process whereby it was developed. Its findings confirm the value of social capital in internationalentrepreneurship. It can provide information, interpretation, market opportunities, and some degree of protectionagainst the risks associated with foreignness, newness and smallness. The study also confirms the vitalimportance of personal trust in sustaining social capital between small firms.
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