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Search Results: 1 - 10 of 120184 matches for " Francisco Carlos da Silveira Cavalcanti "
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Family Farming, Land Use and Sustainability in the Amazon: Focusing on the Educational Dimension  [PDF]
Raimundo Cláudio Gomes Maciel, Francisco Diétima da Silva Bezerra, Francisco Carlos da Silveira Cavalcanti, Oleides Francisca de Oliveira, Pedro Gilberto Cavalcante Filho
Creative Education (CE) , 2018, DOI: 10.4236/ce.2018.91009
Abstract: The struggles?for land possession and deforestation were some results of the recent occupation process in the Amazon. Family farming was the target of land policies in the region, with recurring failures. Issues related to land governance and pro-poor policies have returned to the discussions, especially by the food production. This study aims to evaluate the relationship between the educational level, land access and sustainable land use among farmers in Acre State, Brazil, in the periods 1996/1997 and 2006/2007. Based on a sample, the methodology worked with variables related to the educational level, the access and the use of land, economic results and solid garbage. The results show that the higher educational level is directly related to the land access security and inversely proportional to sustainability in the land use type. Furthermore, production difficulties are leading to greater market dependence and, consequently, to increased generation of solid garbage, whose disposal may be better directed by improving the farmers’ education.
Estudo teórico da dinamica da confluência Brasil-Malvinas
Francisco, Cayo Prado Fernandes;Silveira, Ilson Carlos Almeida da;
Revista Brasileira de Geofísica , 2004, DOI: 10.1590/S0102-261X2004000200006
Abstract: the study of the mesoscale dynamics of the confluence of two western boundary currents was conducted in this work via a quasi-geostrophic inviscid f-plane two-layer ocean theoretical approach. the simplified vertical structure was calculated through the employment of a dynamic calibration scheme based on the dynamical mode structure of the brazil-malvinas confluence region. the brazil-malvinas mode structure was computed from climatological hydrography of the area delimited by 35o-40os and 50o-60ow. two contour dynamics models were constructed: a linear and a nonlinear version. the basic flow configuration consisted of two converging western boundary currents that form a zonal eastward current in the upper layer. the lower layer flow was essentially divergent as a result of a westward zonal jet impinging on the western border. this vertical shear choice assured that the system was baroclinically unstable. the results of the model experiments showed that the presence of the confluence, the western meridional boundary and the barotropic mode in the dynamical structure of the basic flow favored long wave patterns. the three experiments conducted with the nonlinear model exhibited the development of both a reflection pattern and vortical dipoles. the dipoles pinched off from either the retroflection lobe (i.e., the primary crest of the wave train) or the primary trough when the baroclinically unstable current system was perturbed at the boundary vicinities. it was verified that the nonlinear model simulations followed the instability properties predicted by the linear model in terms of meander growth rates, phase speeds and most unstable wavelengths. this suggested that while the baroclinic instability mechanism was responsible for the temporal growth of the meanders, the nonlinear effects caused the dipole isolation and pinch off of the finite amplitude meanders. these dipoles could leave and propagate away from the current axis.
Amostragem e variabilidade espacial de características químicas de um latossolo submetido a diferentes sistemas de preparo
Pesquisa Agropecuária Brasileira , 2000, DOI: 10.1590/S0100-204X2000001000018
Abstract: the study was conducted at the embrapa-centro nacional de pesquisa de arroz e feij?o, in santo ant?nio de goiás, go, brazil, on a clayey oxisol subjected to different soil tillage systems for five consecutive years and cultivated with corn in the summer and bean in the winter under sprinkler irrigation. the objective of this study was to determine the effects of three soil tillage systems, using moldboard plough, harrow disc and no-tillage. forty nine soil samples were collected from a 7x7 lattice sampling area spaced 4 m x 4 m at 0-5 cm and 5-20 cm soil depth. soil samples were analyzed for ph, ca, mg, p, k and base saturation. minimum, maximum and average values were calculated along with the coefficient of variation and average values were compared by the t test. values of ph, ca, mg, p, k and base saturation of soil varied for different treatments. all soil chemical properties values were higher at 0-5 cm soil depth in no-tillage treatment as compared to harrow disc and moldboard plough treatments. among the soil chemical properties evaluated, p and k concentrations showed the highest variability, whereas ph presented the lowest.
Amostragem e variabilidade espacial de características químicas de um latossolo submetido a diferentes sistemas de preparo
Pesquisa Agropecuária Brasileira , 2000,
Abstract: O trabalho foi conduzido na Embrapa-Centro Nacional de Pesquisa de Arroz e Feij o, em Santo Ant nio de Goiás, GO, em Latossolo Vermelho-Escuro distrófico, textura argilosa, submetido a diferentes sistemas de preparo, durante cinco anos consecutivos (19921996), e cultivado com milho no ver o e feijoeiro no inverno, sob irriga o por aspers o. O objetivo foi avaliar as características químicas de um solo Latossolo Vermelho-Escuro após cinco anos de uso de três sistemas de preparo para o plantio. Os sistemas foram: com arado de aiveca, grade aradora e plantio direto. As amostras para análise química foram coletadas, em todos os três tratamentos, em uma malha quadrada de 49 pontos (7x7), a espa os de 4 m x 4 m, e nas profundidades de 0-5 cm e 5-20 cm de solo. As amostras foram analisadas para determina o do pH, Ca, Mg, P, K e cálculo da satura o por bases. Em rela o a cada variável calculou-se o valor médio, mínimo, máximo e coeficiente de varia o, comparando-se as médias, entre tratamentos, pelo teste t. Os valores de pH, Ca, Mg, P, K e satura o por bases do solo variaram nos diferentes tratamentos. Na profundidade de 0-5 cm, os valores de todas as variáveis foram maiores no sistema plantio direto do que no arado e na grade. Os valores de P e de K apresentaram as maiores variabilidades, e os de pH, as menores.
Instabilidade linear de cisalhamento vertical em jatos geofísicos meridionais
Silveira, Ilson Carlos Almeida da;Calado, Leandro;Francisco, Cayo Prado Fernandes;
Revista Brasileira de Geofísica , 2003, DOI: 10.1590/S0102-261X2003000200003
Abstract: the study of linear vertical shear instability of meridional (north-south) jets is conducted via an unidimensional hydrodynamic model, based on quasi-geostrophic potential vorticity conservation. the shape of the vertical jet profiles are motivated by the brazil current-intermediate western boundary current system that flows off the brazilian southeast coast and are built with the aim to satisfy necessary conditions for occuring baroclinic instability. the hydrodynamic model is based on johns (1988) and its formulation is presented without the omission of algebraic details. its physics is explored through numerically-solved examples and comparison with the analytical part of the model. the purpose is to subsidize the diagnosis of forms in which instability occur: at the ocean surface and in the interior of the water column. additionally, the effect of the continental slope on the instability properties is investigated and discussed, through its effects on the propagation of unstable waves generated by instability process.
Discourse analysis of the National Policy for Health Promotion
Aline Raddatz,Alessandro da Silva Scholze,Carlos Francisco Duarte Júnior,Plínio Augusto Freitas Silveira
Revista Brasileira em Promo??o da Saúde , 2011,
Abstract: Objective: To analyze the characteristics of the perspectives of Health Promotion present in the proposals of the actual National Policy for Health Promotion (PNPS). Methods: We conducted a qualitative, exploratory and documental study using the methodological procedures of the Collective Subject Discourse (CSD) in the period of October 2009 to June 2010. Results: There were five Central-Ideas related to three different Anchorages. The DSC connected to Central-Ideas: (1) Spreading and introducing the PNPS; (3) Organizing and introducing proceedings targeting individual risk factors; and (4) Monitoring and controlling damages and risk factor, showed to be linked to Behavioral and/or Biomedical Approaches of Health Promotion. The DSC connected to Central-Ideas: (2) Discussing and Evaluating the PNPS and (5) Organizing and introducing proceedings for sustainable development reflected a Socio-Environmental Approach of Health Promotion. Conclusion: It was possible to verify the complexity of a set of proposals that reflect different perspectives of Health Promotion, considering that the Socio-Environmental approach, although not predominant in the PNPS, can be the most effective and according to the Unified Health System(SUS).
Monica Cavalcanti Sa de Abreu,Jossandra Sampaio Fernandes,Francisco de Assis Soares,José Carlos Lázaro da Silva Filho
Revista Universo Contábil , 2008,
Abstract: This work analyzes the evolution of environmental conduct Brazilian steel companies which have published their accountancy reports concerning the financial years from 2000 to 2004. In global markets, the steel companys market structure suffers great environmental pressure exerted by different stakeholders. On the same hand, the social and environmental disclosure is important to the decision making process. The research was prepared with evidence collected from the firms’ accountancy reports published by Brazilian Securities and Exchange Commission using the disclosure-scoring measure methodology developed by Al-Tuwaijri et al (2003). The results demonstrate that most companies prefer to report quantitative information when they improve their environmental conduct. The research concludes that steel companies have increased their environmental responsibilities as times goes by. O artigo analisa a evolu o da conduta ambiental das empresas siderúrgicas brasileiras, referentes aos exercícios sociais de 2000 a 2004. Parte-se da hipótese de que a indústria siderúrgica está sujeita a fortes press es ambientais, ditadas principalmente pelos stakeholders, e que as informa es de cunho sócio-ambiental s o relevantes no processo decisório. A pesquisa foi elaborada a partir de evidências coletadas nas demonstra es contábeis das empresas divulgadas à Comiss o de Valores Mobiliários (CVM). A técnica de quantifica o foi desenvolvida por Al-Tuwaijri et al (2003) e baseia-se no disclosure-scoring measure. A análise das evidencia es da conduta ambiental de cada uma das siderúrgicas pertencentes à amostra permitiu verificar que a medida que as empresas melhoram sua conduta ambiental existe uma tendência crescente em apresentar informa es quantitativas. Conclui-se, a partir dos indicadores de evidencia o analisados, que ocorreu uma evolu o nas condutas conduzindo a um incremento na responsabilidade ambiental na indústria siderúrgica brasileira.
Human toxocariasis: a seroepidemiological survey in the municipality of Campinas (SP), Brazil
ANARUMA FILHO, Francisco;CHIEFFI, Pedro Paulo;CORREA, Carlos Roberto Silveira;CAMARGO, Eide Dias;SILVEIRA, Edilene P. Real da;ARANHA, Joana José Brand?o;RIBEIRO, Manoel Carlos S. Almeida;
Revista do Instituto de Medicina Tropical de S?o Paulo , 2002, DOI: 10.1590/S0036-46652002000600002
Abstract: the occurrence of human toxocara infection was evaluated in three neighborhoods of the periphery of the campinas municipality (jardim santa m?nica, jardim s?o marcos and jardim campineiro) in 1999. forty residences and 138 residents were randomly selected by drawing lots and were submitted to a seroepidemiological survey, which included blood collection for the immunoenzymatic detection (elisa) of anti-toxocara antibodies and a blood count, and the application of a semi-structured questionnaire for the evaluation of epidemiological data. significant levels of anti-toxocara antibodies were detected in 23.9% of the 1999 samples. no significant difference in the frequency of infection according to age was observed. environmental contamination with toxocara eggs was observed in 12.3 and 14.0% of 57 soil samples collected in the same region in december 1998 and july 1999, respectively. univariate analysis and multiple logistic regression of the data obtained from the questionnaires and of the results of the serological tests, suggest a significant influence of socioeconomic variables on the frequency of human infection with toxocara under the conditions prevalent in the study area.
Soroprevalência para hepatite A e hepatite B em quatro centros no Brasil
Clemens, Sue Ann Costa;Fonseca, José Carlos Da;Azevedo, Tania;Cavalcanti, Anamaria;Silveira, Thêmis R.;Castilho, Marcia C.;Clemens, Ralf;
Revista da Sociedade Brasileira de Medicina Tropical , 2000, DOI: 10.1590/S0037-86822000000100001
Abstract: the prevalence of antibodies to hepatitis a and b virus was assessed in 3,653 subjects across four regions of brazil. the anti-hav and anti-hbc seroprevalence were 64.7% and 7.9%, respectively. the highest anti-hav (92.8%) and anti-hbc (21.4%) rates were seen in the northern region. in other regions, anti-hav seroprevalence over 90% was only reached in the more elderly, indicating an intermediate endemicity and a significantly higher anti-hav prevalence was seen in the low socioeconomic group between 1-30 years. with respect to anti-hbc seroprevalence an increase was seen in adolescents and there was a significantly higher anti-hbc prevalence in the lower socioeconomic group between 1-20 years. a 3.1% anti-hbc prevalence was seen in one-year-old infants, suggesting a vertical transmission. the major findings of this study indicate that the pre-adolescent and adolescent population in some brazilian cities are at greatest risk from both hepatitis a and b infection, but for different reasons.
Mortality and Case Fatality Due to Visceral Leishmaniasis in Brazil: A Nationwide Analysis of Epidemiology, Trends and Spatial Patterns
Francisco Rogerlandio Martins-Melo, Mauricélia da Silveira Lima, Alberto Novaes Ramos, Carlos Henrique Alencar, Jorg Heukelbach
PLOS ONE , 2014, DOI: 10.1371/journal.pone.0093770
Abstract: Background Visceral leishmaniasis (VL) is a significant public health problem in Brazil and several regions of the world. This study investigated the magnitude, temporal trends and spatial distribution of mortality related to VL in Brazil. Methods We performed a study based on secondary data obtained from the Brazilian Mortality Information System. We included all deaths in Brazil from 2000 to 2011, in which VL was recorded as cause of death. We present epidemiological characteristics, trend analysis of mortality and case fatality rates by joinpoint regression models, and spatial analysis using municipalities as geographical units of analysis. Results In the study period, 12,491,280 deaths were recorded in Brazil. VL was mentioned in 3,322 (0.03%) deaths. Average annual age-adjusted mortality rate was 0.15 deaths per 100,000 inhabitants and case fatality rate 8.1%. Highest mortality rates were observed in males (0.19 deaths/100,000 inhabitants), <1 year-olds (1.03 deaths/100,000 inhabitants) and residents in Northeast region (0.30 deaths/100,000 inhabitants). Highest case fatality rates were observed in males (8.8%), ≥70 year-olds (43.8%) and residents in South region (17.7%). Mortality and case fatality rates showed a significant increase in Brazil over the period, with different patterns between regions: increasing mortality rates in the North (Annual Percent Change – APC: 9.4%; 95% confidence interval – CI: 5.3 to 13.6), and Southeast (APC: 8.1%; 95% CI: 2.6 to 13.9); and increasing case fatality rates in the Northeast (APC: 4.0%; 95% CI: 0.8 to 7.4). Spatial analysis identified a major cluster of high mortality encompassing a wide geographic range in North and Northeast Brazil. Conclusions Despite ongoing control strategies, mortality related to VL in Brazil is increasing. Mortality and case fatality vary considerably between regions, and surveillance and control measures should be prioritized in high-risk clusters. Early diagnosis and treatment are fundamental strategies for reducing case fatality of VL in Brazil.
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