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Search Results: 1 - 10 of 245666 matches for " José Roberto Pereira de;Esposito "
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Diversidade de Calliphoridae (Insecta: Diptera) na base de extra??o petrolífera da Bacia do Rio Urucu, na Amaz?nia brasileira
Esposito, Maria Cristina;Sousa, José Roberto Pereira de;Carvalho-Filho, Fernando da Silva;
Acta Amazonica , 2010, DOI: 10.1590/S0044-59672010000300018
Abstract: the diversity and abundance of blow flies in three environments (anthropic gaps, tree-fall gaps, and primary "terra firme" forest) of porto urucu/am were evaluated in annual collects realized in 2004, 2005, and 2006. during these three years were collected 2,121 specimens belonging to 14 species. the most abundant species were chloroprocta idioidea (robineau- desvoidy), eumesembrinella randa (walker), and hemilucilia semidiaphana (rondani). primary forests and tree-fall gaps enviroments, showed higher blow flies abundance than anthropic gaps, with diversity and equitability index higher than anthropic gaps, when the dominance value was high.
Composi??o, abundancia e riqueza de Calliphoridae (Diptera) das matas e clareiras com diferentes coberturas vegetais da Base de Extra??o Petrolífera, bacia do Rio Urucu, Coari, Amazonas
Sousa, José Roberto Pereira de;Esposito, Maria Cristina;Carvalho Filho, Fernando da Silva;
Revista Brasileira de Entomologia , 2010, DOI: 10.1590/S0085-56262010000200010
Abstract: this research was carried out in the oil extraction field located in urucu river basin, coari, state of amazonas, brazil, during the months of april, june and october of 2007. a total of 16 areas were sampled, 12 of them were gaps and four forests, arranged in four environments (gaps litlle-recovered, gaps semi-recovered, gaps well-recovered and preserved forest). a total of 7,215 calliphorid flies was captured belonging to 16 species and only one species, chloroprocta idioidea (robineau-desvoidy, 1830), represented 88.06% of this total. the abundance patterns of the family were not different among the environments, however they were different for the following species: eumesembrinella randa (walker, 1849), hemilucilia semidiaphana (rondani, 1850) and paralucilia adespota dear, 1985 the estimated richness was significantly different between the environments and showed two groups: i, gaps litlle-recovered (c1) and gaps semi-recovered (c2); ii, gaps well-recovered (c3) and preserved forest (mt).
Diversity of Calliphoridae and Sarcophagidae (Diptera, Oestroidea) in continuous forest and gaps at different stages of regeneration in the Urucu oilfield in western Brazilian Amazonia
Sousa, José Roberto Pereira de;Esposito, Maria Cristina;Carvalho Filho, Fernando da Silva;
Revista Brasileira de Entomologia , 2011, DOI: 10.1590/S0085-56262011000400014
Abstract: diversity of calliphoridae and sarcophagidae (diptera, oestroidea) in continuous forest and gaps at different stages of regeneration in the urucu oilfield in western brazilian amazonia. the diversity of calliphoridae and sarcophagidae in continuous forest and gaps at different stages of regeneration was studied in the urucu river basin, in coari, state of amazonas, brazil. the flies were collected at 16 sampling points, 12 in gaps at different stages of regeneration (early _ c1, mid- c2 and late successional _ c3) and four in continuous forest _ mt. the diversity of blowflies was similar in the two less regenerated habitats (c1 and c2), and lower than that in the late successional (c3) and continuous forests (mt). by contrast, the diversity of flesh flies was much higher in all three types of gaps (c1, c2 and c3) in comparison with continuous forest (mt). ordination (nmds) and similarity (anosim) analyses revealed that the blowflies communities were grouped by habitat type, which affected species composition more than diversity. analysis of the flesh flies revealed two main groupings, gaps (c1, c2 and c3) and continuous forest (mt), with no evidence of any influence of successional stage on the diversity of the community.
Múltiplos olhares sobre a mortalidade infantil no Ceará, Brasil
Sousa, José Roberto Pereira de;Nations, Marilyn;
Cadernos de Saúde Pública , 2011, DOI: 10.1590/S0102-311X2011000200007
Abstract: this qualitative study analyzes the perceptions of various social actors towards infant mortality and the program to reduce it in ceará state, northeast brazil. the study compares two municipalities (counties) that showed opposite infant mortality trends from 1993 to 1997, during which time ceará achieved international visibility for having reduced infant mortality statewide. a total of 48 semi-structured interviews with four groups of key informants health system managers, community health agents, mothers who had lost a child, and neighbor women with children in the same age bracket and content analysis revealed "multiple conflicting voices" on the issue. although the level of political determination to implement the interventions varied between the two municipalities, the differences in perceptions concerning infant death were more striking between the various groups of social actors, regardless of the municipality. the study revealed a kind of authoritarian educational practice that jeopardizes acceptance of the community health agents program. public policies are needed that give voice to the people closest to the experience of infant death.
Characteristics of the CsI:Tl Scintillator Crystal for X-Ray Imaging Applications  [PDF]
Maria da Concei??o Costa Pereira, Tufic Madi Filho, José Roberto Berretta, Carlos Henrique de Mesquita
Materials Sciences and Applications (MSA) , 2018, DOI: 10.4236/msa.2018.92018
Abstract: Scintillators are high-density luminescent materials that convert X-rays to visible light. Thallium doped cesium iodide (CsI:Tl) scintillation materials are widely used as converters for X-rays into visible light, with very high conversion efficiency of 64.000 optical photons/MeV. CsI:Tl crystals are commercially available, but, the possibility of developing these crystals into different geometric shapes, meeting the need for coupling the photosensor and reducing cost, makes this material very attractive for scientific research. The objective of this work was to study the feasibility of using radiation sensors, scintillators type, developed for use in imaging systems for X-rays. In this paper, the CsI:Tl scintillator crystal with nominal concentration of the 10-3 M was grown by the vertical Bridgman technique. The imaging performance of CsI:Tl scintillator was studied as a function of the design type and thickness, since it interferes with the light scattering and, hence, the detection efficiency plus final image resolution. The result of the diffraction X-ray analysis in the grown crystals was consistent with the pattern of a face-centered cubic (fcc) crystal structure. Slices 25 × 2 × 3 mm3 (length, thickness, height) of the crystal and mini crystals of 1 × 2 × 3 mm3 (length, thickness, height) were used for comparison in the imaging systems for X-rays. With these crystals scintillators, images of undesirable elements, such as metals in food packaging, were obtained. One-dimensional array of photodiodes and the photosensor CCD (Coupled Charge Device) component were used. In order to determine the ideal thickness of the slices of the scintillator crystal CsI:Tl, Monte Carlo method was used.
Interfaces epistemológicas sobre administra??o pública, institucionalismo e capital social
Silva, Edson Arlindo;Pereira, José Roberto;Alcantara, Valderí de Castro;
Cadernos EBAPE.BR , 2012, DOI: 10.1590/S1679-39512012000100004
Abstract: contemporary society is marked by the presence of institutions that organize, regulate and govern the social relations of work. while institutions can be designed individually, they also have the ability to organize into networks that aim to strengthen intra and inter- institutions. given this context, the aim here is to perform a theoretical incursion into public administration, institutionalism and social capital, showing the possible conceptual interfaces in order to elucidate the contributions of institutional and social capital to better understand contemporary public administration. on the one hand, the theory of social capital promotes understanding of the set of investments that are channeled into socioeconomic and cultural activities to meet specific social needs arising from organized groups in civil society. thus, according to the assumptions of the capital, people interact with each other for access to public resources in order to achieve the collective targeting of several common interests. meanwhile, institutionalism sets out on the assumption that any institution that is formally constituted and legitimately recognized by the legal attributes of society loses when the reason for the logic of its constitution can no longer be any more effective than individual action alone. finally, the discussions surrounding the themes of social capital, institutional and public administration models invite us to reflect on the changes that take place in modern societies, especially regarding forms of government and trends in relations between state and society that take place in a globalized world.
Análise da aplicabilidade do modelo gerencial na administra o municipal Análisis de la aplicabilidad del modelo de la gestión en la administración municipal Applicability analysis of the model management in municipal administration
Priscila Gomes de Araújo,José Roberto Pereira
Revista de Administra??o Pública , 2012, DOI: 10.1590/s0034-76122012000500001
Abstract: Esse artigo tem como objetivo identificar e analisar as raz es pelas quais a administra o de um município do estado de Minas Gerais n o adotou, integralmente, o modelo gerencial, tendo percorrido mais de 15 anos desde a última reforma do estado e mais de oito anos do Choque de Gest o de Minas Gerais. Para tanto, utilizou-se como parametro de análise e investiga o o índice de Administra o Pública Gerencial (IAPG), desenvolvido por Freitas Jr. (2009), com base nos pressupostos teóricos do modelo de administra o pública gerencial. Nesse sentido, foi realizada uma análise das características e objetivos do modelo gerencial, bem como a demonstra o dos esfor os para utiliza o desse modelo na administra o pública brasileira nos três níveis de governo. A abordagem metodológica utilizada é qualitativa e de natureza teórico-empírica, adotando-se como instrumento de coleta de informa es um roteiro de entrevistas abertas com prefeitos, chefes de gabinete, vereadores e secretários das duas últimas gest es municipais, que correspondem aos mandatos de 2001 a 2004 e de 2005 a 2008. Os resultados alcan ados mostram que o maior entrave para a ado o efetiva do modelo de administra o pública gerencial no município é a falta de capacidade de gerenciamento e conhecimento dos próprios prefeitos em rela o ao modelo. Nesse sentido, verificou-se a necessidade de formar e qualificar os gestores públicos municipais em administra o pública para atuarem, profissionalmente, na realidade local, bem como fortalecer os canais de participa o da popula o, como forma de controle social da gest o pública. Este artículo tiene como objetivo identificar y analizar las razones por las cuales la administración de un municipio en el estado de Minas Gerais, Brasil, no se ha adoptado en su totalidad, el modelo de gestión, después de más de 15 a os desde la última reforma del Estado y más de ocho a os del Choque de Gestión de Minas Gerais. Para el análisis, se utilizó como parámetro el índice de Gestión de la Administración Pública (GPI), desarrollado por Freitas Jr. (2009), basada en supuestos teóricos del modelo de gestión pública. En consecuencia, se realizó un análisis de las características y objetivos del modelo de gestión, así como la demostración de los esfuerzos para utilizar este modelo en la administración pública brasile a en los tres niveles de gobierno. El enfoque metodológico es cualitativo, teórico y empírico, adoptando como una herramienta para la recopilación de información de un guión de entrevistas con alcaldes, jefes de personal, concejales y secretarios de las dos
Edmilson Santos Cruz,Antonio Donizette de Oliveira,José Roberto Soares Scolforo,José Luis Pereira de Rezende
CERNE , 2003,
Abstract: This study aimed at analyzing the international pulp market, taking into account themain exporting countries and importing regions, with the objective of estimating, for each market, theown-price and cross-price elasticity in relation to the demand of the pulp, differentiated for country oforigin. The model considers that imports are differentiated by origin; therefore they are not perfect substitutes. The demand from Europe, North America and the Rest of the World for the pulp from theUnited States,Canada, Sweden, Finland, Portugal and Brazil was inelastic. The Asian demand for thissome pulp was elastic. Europe and the Rest of the World showed negative cross-price elasticity, i. e.,and the imported pulp from other countries are complementary products. North America and Asiashowed positive crow-price elasticity, i. e., they consider the pulp produced in other countries assubstitute products. The net effect of the variation on the price of pulp in a country h, over the amountof pulp that goes to the region i depends on the matching of values related to the elasticity ofsubstitution and the price elasticity of the total demand.
Al-Doping Effect on the Surface Morphology of ZnO Films Grown by Reactive RF Magnetron Sputtering  [PDF]
Erica Pereira da Silva, Michel Chaves, Gilvan Junior da Silva, Larissa Baldo de Arruda, Paulo Noronha Lisboa-Filho, Steven Frederick Durrant, José Roberto Ribeiro Bortoleto
Materials Sciences and Applications (MSA) , 2013, DOI: 10.4236/msa.2013.412096

Zinc oxide (ZnO) and aluminum-doped zinc oxide (ZnO:Al) thin films were deposited onto glass and silicon substrates by RF magnetron sputtering using a zinc-aluminum target. Both films were deposited at a growth rate of 12.5 nm/min to a thickness of around 750 nm. In the visible region, the films exhibit optical transmittances which are greater than 80%. The optical energy gap of ZnO films increased from 3.28 eV to 3.36 eV upon doping with Al. This increase is related to the increase in carrier density from 5.9 × 1018 cm-3 to 2.6 × 1019 cm-3. The RMS surface roughness of ZnO films grown on glass increased from 14 to 28 nm even with only 0.9% at Al content. XRD analysis revealed that the ZnO films are polycrystalline with preferential growth parallel to the (002) plane, which corresponds to the wurtzite structure of ZnO.

Huberto José Kliemann,Roberto Toledo de Magalh?es,Itamar Pereira de Oliveira,Milton Ferreira de Moraes
Pesquisa Agropecuária Tropical , 2007, DOI: 10.5216/pat.v33i1.2400
Abstract: Avaliaram-se as rela es da produ o de massa verde com a disponibilidade dos nutrientes em um latossolo vermelhoescuro, distrófico, fase Cerrado, textura média, em áreas de pastagem provenientes da abertura do cerrado original. Formou-se o pasto, aplicando-se 1,5 t ha-1 de calcário calcítico e semeadura direta com Brachiaria decumbens. Após dez anos de uso, renovou-se a pastagem através do Sistema Barreir o, corrigindo-a com 2,0 t ha-1 de calcário dolomítico. Em uma única opera o, semearam-se o arroz e a Brachiaria brizantha mais a aduba o nas profundidades de 3 a 5 cm e de 8 a 10 cm, respectivamente. Monitoraram-se áreas com um a seis anos de implanta o do sistema, tendo como referências uma área de mata nativa e outra de dezessete anos de pastejo tradicional. Os dados obtidos levam a concluir: i) a rela o entre produ o de massa verde e teores de matéria organica no solo fornece um nível crítico de 19,5 g MO kg-1 de solo, que n o pode ser interpretado como indicador confiável de nitrogênio disponível por causa do caráter dinamico da matéria organica no solo; ii) as rela es entre produ o de massa verde e teores de nutrientes nos solos permitem estabelecer níveis críticos para: cálcio + magnésio trocáveis ? 4,5 cmolc dm-3 de solo, potássio trocável ? 123 mg dm-3, zinco disponível ? 1,7 mg Zn dm-3 e cobre disponível ? 2,2 mg Cu dm-3; iii) n o foi possível determinar o nível crítico de fósforo disponível pelo extrator Mehlich-1, porque a dose de fosfato aplicada foi insuficiente para sustentar a produtividade do sistema ao longo dos anos. PALAVRAS-CHAVE: Cerrado; macronutriente; micronutriente; pastagens tropicais. Relations of green matter yield to nutrient availability in a dystrophic Oxisol (Goiás, Brazil) were assessed in a pasture area derived from an original savannah opening. Pasture was established by applying 1.5 t ha-1 of calcitic lime and direct sowing of Brachiaria decumbens. After ten years, this pasture was replanted using the Barreir o system. In a single operation, rice and Brachiaria brizantha were sown together and fertilizers were applied at depths of 3-5 cm and 8-10 cm, respectively. Areas where the system had been ineffect for one to six years were monitored, using a native forest area and another with 17-year old traditional pasture as reference. The data obtained allow to conclude the following: i) a critical level of 19.5g OM kg-1 of soil was estimated by relating green matter yield to organic matter contents in the soils, but this is not a reliable index for available nitrogen, because of the dynamic character of soil organ
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