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Search Results: 1 - 10 of 191111 matches for " Joaquim Francisco de; "
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Prioridades para investimentos em usinas elétricas
Carvalho, Joaquim Francisco de;
Estudos Avan?ados , 2008, DOI: 10.1590/S0103-40142008000300013
Abstract: due to reasons out of the scope of this article, important investments in the electric sector were delayed, increasing the risk of power shortages in brazil in the near future, with serious impacts on industrial production and quality of life. among the projects being studied by the ministry of energy to be operative in time to reduce that risk are the angra iii nuclear power plant and some hidro power plants in northern brazil, what raises doubts and provokes debates in the press, chiefly about the costs of the energy produced. in this article we try clear up some of these doubts.
O espa?o da energia nuclear no Brasil
Carvalho, Joaquim Francisco de;
Estudos Avan?ados , 2012, DOI: 10.1590/S0103-40142012000100021
Abstract: this article reviews the history and describes the experience on nuclear energy in brazil, showing that nuclear technology applied to biomedical sciences, industry and agriculture has been largely developed in this country, from the year 1950 on. then the paper shows that brazil can cover its electricity consumption with only renewable energy sources, without nuclear power plants. finally the arguments usually employed in the press, pro and against nuclear power plants are analyzed and some commercial and political aspects of the problem are commented. the sales strategy of the nuclear industry in brazil is also commented.
Estimativa do Balan o Hídrico para as Condi es Climáticas de Iguatu-CE, Usando Modelo Estocástico
Francisco Dirceu Duarte Arraes,Fernando Bezerra Lopes,Francisco de Souza,Joaquim Branco de Oliveira
Revista Brasileira de Agricultura Irrigada , 2009, DOI: 10.7127/rbai.v3n200020
Abstract: Este trabalho teve como objetivo a obten o dos parametros da distribui o gama ajustada aos dados de precipita o e de evapotranspira o mensal para a regi o de Iguatu, bem como, estimar os déficits e os excedentes hídricos mensais, através de modelos probabilísticos e em diferentes níveis de probabilidade. O trabalho foi realizado utilizando a série de dados em escala diária compreendida entre os anos de 1961 a 2005, oriundos da Esta o Climatológica Principal (ECP) de Iguatu, pertencente à rede de observa es meteorológicas de superfície do Instituto Nacional de Meteorologia (INMET). Para cada base de dados determinaram-se os parametros α e β da Distribui o Gama para a probabilidade de chuva e da evapotranspira o mensal. O ajuste dos dados foi realizado através do teste de aderência do Qui-Quadrado ao nível de 5% de significancia. Elaborou-se, para cada nível probabilístico analisado, um balan o hídrico mensal, utilizando-se a capacidade de água disponível como sendo de 100 mm. Ao nível de 75% de probabilidade, há uma necessidade de reposi o hídrica variando de 132,5 mm no mês de julho até 176,5 mm no mês novembro, com totais de 335,4 mm no primeiro semestre e de 967,7 mm no segundo semestre, totalizando 1303,1 mm ao longo do ano.
Efeito do tempo de conserva??o dos espécimes sobre a qualidade dos microincrementos em otólitos sagittae de Anchoa tricolor (Agassiz) (Clupeiformes, Engraulidae)
Santos, Joaquim N. de S.;Silva, Marcio de A.;Vasconcellos, Ruan M.;Araújo, Francisco G.;
Revista Brasileira de Zoologia , 2005, DOI: 10.1590/S0101-81752005000400022
Abstract: we compared the number of microstructure of anchoa tricolor (agassiz, 1829) post-larvae sagittae otoliths in specimens fixed in formalin 10% in different periods of conservation (four days versus four years). significant differences were found in the number of microstructure for post-larvae ranging from 20-26 mm total length (tl), with averages of 18.6 microstructures (± 0.75 standard error) for fishes preserved for four years, and 35.3 microstructures (± 1.28 standard error) for fishes preserved for four days. therefore, the number of post-larvae otoliths microstructure preserved for long periods can not be suitable to infer age or growth rates. additionally, we failed in detecting and extracting otoliths in post-larvae smaller than 20 mm tl preserved due to its comparatively higher organic matter composition, mainly during the early life cycle.
Distribui o de frequência da chuva para regi o Centro-Sul do Ceará, Brasil Frequency distribution of rainfall for the South-Central region of Ceará, Brazil
ítalo Nunes Silva,Joaquim Branco de Oliveira,Larissa de Oliveira Fontes,Francisco Dirceu Duarte Arraes
Revista Ciência Agron?mica , 2013,
Abstract: Foram analisadas sete distribui es de probabilidade Exponencial, Gama, Log-normal, Normal, Weibull, Gumbel e Beta para a chuva mensal e anual na regi o Centro-Sul do Ceará, Brasil. Para verifica o dos ajustes dos dados às fun es densidade de probabilidade foi utilizado o teste n o-paramétrico de Kolmogorov-Smirnov com nível de 5% de significancia. Os dados de chuva foram obtidos da base de dados da SUDENE registrados durante o período de 1913 a 1989. Para a chuva total anual teve ajuste satisfatório dos dados às distribui es Gama, Gumbel, Normal e Weibull e n o ocorreu ajuste às distribui es Exponencial, Log-normal e Beta. Recomenda-se o uso da distribui o Normal para estimar valores de chuva provável anual para a regi o, por ser um procedimento de fácil aplica o e também pelo bom desempenho nos testes. A distribui o de frequência Gumbel foi a que melhor representou os dados de chuva para o período mensal, com o maior número de ajustes no período chuvoso. No período seco os dados de chuva foram melhores representados pela distribui o Exponencial. Seven probability distributions were analysed: Exponential, Gamma, Log-Normal, Normal, Weibull, Gumbel and Beta, for monthly and annual rainfall in the south-central region of Ceará, Brazil. In order to verify the adjustments of the data to the probability density functions, the non-parametric Kolmogorov-Smirnov test was used with a 5% level of significance. The rainfall data were obtained from the database at SUDENE, recorded from 1913 to 1989. For the total annual rainfall, adjustment of the data to the Gamma, Gumbel, Normal and Weibull distributions was satisfactory, and there was no adjustment to the Exponential, Log-normal and Beta distributions. Use of Normal distribution is recommended to estimate the values of probable annual rainfall in the region, this being a procedure of easy application, performing well in the tests. The Gumbel frequency distribution was the one that best represented rainfall data over a monthly period, with the highest number of adjustments during the rainy season. In the dry season, rainfall data were best represented by an exponential distribution.
ANTICORPOS ANTI-Toxoplasma gondii EM CARRAPATOS NO MUNICíPIO DE GOI NIA: LEVANTAMENTO SOROLóGICO ANTIBODIES ANTI - Toxoplasma gondii IN GOATS IN THE AREA OF GOI NIA: SOROLOGICAL SURVEY
Guido Fontgalland Coelho Linhares,Miguel Joaquim Dias,Aires Manoel de Souza,Francisco de Carvalho Dias Filho
Pesquisa Agropecuária Tropical , 2007, DOI: 10.5216/pat.v20i1.2587
Abstract: Foi efetuado estudo sorológico para pesquisa de anticorpos anti-Toxoplasma gondii pelo método de hemaglutina o indireta em 109 (cento e nove) amostras de soro de caprinos provenientes de 5 (cinco) rebanhos distintos do município de Goiania. Foi encontrado 30,2% de animais positivos com idade inferior a um ano de idade, e 51,5% em animais com idade superior a um ano de idade. Com rela o ao sexo, 46,3% das fêmeas foram positivas, enquanto que os machos 33,3%. E finalmente 43,1% quando foram testados os animais de ambos os sexos, exceto os lactantes. O titulo mínimo considerado foi 1/64. Studies on prevalence of anti-Toxoplasma gondii antibodies was carried out by the indirect hemaglutination test in 109 caprine sera samples from five distinct heards in Goiania, Goiás. It had been shown positivity of 30.2% for animals under 1 year old and 51.5% for animals over 1 year old. Between females 46.3% were positive and males 33.3%. And finally 43.1% among animals of both sexes and any age, except lactents. The sera were tested from the inicial dilutron of 1/64.
Avalia??o das necessidades dos servi?os oficiais de saúde pública para o município de S?o Paulo: a médio e longo prazo
Yunes,Jo?o; Cardoso,Joaquim Francisco; Mendon?a,Mário Laranjeira de;
Revista de Saúde Pública , 1969, DOI: 10.1590/S0034-89101969000200010
Abstract: this paper refers to the demand of sanitary unities, at short and long run, for the years of 1975 and 1990, respectively. this study was part of the "plano urbanístico básico de s?o paulo (pub)", and the proposition always followed the criterium of integrated or polivalent unities. in the definition of the proposed patterns it was considered the size of population, demographic density, size and extension of the area and socio-economic classes. the sanitary unities were divided into three types, and their programs established according to their purposes. the "municipal" authorities are responsible for their functioning, as well as the state and welfare agencies.
Histomorphometry of penile smooth muscle fiber in severe erectile dysfunction
Claro, Joaquim de Almeida;Aboim, José;Andrade, Enrico;Alarcon, Gustavo;Ortiz, Valdemar;Sampaio, Francisco;Srougi, Miguel;
Sao Paulo Medical Journal , 2005, DOI: 10.1590/S1516-31802005000400005
Abstract: context and objective: smooth muscle fiber has fundamental importance in erection. alterations in its function or quantity may be associated with erectile dysfunction. the study objective was to assess the proportion of penile smooth muscle fiber in patients with severe erectile dysfunction. design and setting: clinical study, in the sexual dysfunction group, universidade federal de s?o paulo (unifesp), and in the anatomy laboratory, universidade estadual do rio de janeiro (uerj). methods: twenty patients with severe erectile dysfunction were selected to form two groups of ten patients: one with normal arterial flow (age range: 44 to 78 years) and the other with altered arterial flow (age range: 38 to 67 years). these groups were compared with a group formed by ten cadavers aged 18 to 25 years that were presumed to have been potent. quantification of the smooth muscle fibers was done by means of an immunohistochemical study. results: the proportion of smooth muscle fiber found was 41.15% for the control group. the patients with erectile dysfunction and normal arterial flow presented 27.24% and those with altered arterial flow presented 25.74%; 19 patients presented at least one chronic disease or risk factor for erectile dysfunction, with prominence for diabetes mellitus, systemic arterial hypertension and smoking. conclusion: among patients with severe erectile dysfunction, the arterial flow on its own does not present interference in the proportion of smooth muscle fiber. the diminution of the proportion of smooth muscle fiber may result from chronic diseases and vascular risk factors.
Methodology for the spatialisation of a reference evapotranspiration from SRTM data Metodologia para espacializa o da evapotranspira o de referência a partir de dados SRTM
Joaquim Branco de Oliveira,Francisco Dirceu Duarte Arraes,Paula Carneiro Viana
Revista Ciência Agron?mica , 2013,
Abstract: The aim of this work was to develop a methodology for the spatialisation of mean monthly reference evapotranspiration for the State of Ceará, using the Hargreaves and Samani equation, from estimated air-temperature data based on digital elevation models. The study area is located in northeastern Brazil, between the latitudes 2.5o and 8o South and longitudes 37o and 42o West. The data used in the study are from the network of meteorological stations of the National Institute of Meteorology. The equation proposed by Hargreaves and Samani was used to estimate ET, being spatialised in the form of maps using the Idrisi Andes software for the manipulation of digital data of latitude, longitude and altitude in order to obtain the variables of the equation. The study used the SRTM data as an altitude map. To compare the results obtained by the Hargreaves and Samani equation to temperatures maps calculated from the digital terrain model, the value of ET was determined for each location from weather data with the help of the REF-ET program. The coefficients of determination of the temperature models generated varied between 0.88 and 0.98, which showed a good correlation between the air temperature and the geographic data. The proposed methodology for the spatialisation of ET from temperature maps obtained by SRTM, proved to be a viable alternative, given the results of statistical analysis when compared to the standard method. O objetivo do presente trabalho foi desenvolver uma metodologia para espacializa o da evapotranspira o de referência média mensal pela equa o de Hargreaves e Samani para o Estado do Ceará, a partir de dados de temperatura do ar estimados em fun o de modelos digitais de eleva o. A área do estudo se encontra localizada na regi o Nordeste do Brasil, entre os paralelos 2,5o e 8o de latitude Sul e os meridianos 37o e 42o de longitude Oeste. Os dados utilizados no estudo s o oriundos da rede de esta es meteorológicas pertencentes ao Instituto Nacional de Meteorologia. A equa o proposta por Hargreaves e Samani foi utilizada para a estimativa da ETo sendo espacializada na forma de mapas através do software Idrisi Andes pela manipula o dos dados digitais de latitude, longitude e altitude para obten o das variáveis da equa o. Foram utilizados os dados do SRTM, como mapa de altitude. Para a compara o dos resultados obtidos pela equa o de Hargreaves e Samani pelos mapas de temperaturas calculadas a partir do modelo numérico do terreno, foi determinado o valor de ETo para cada localidade a partir dos dados climáticos com auxílio do program
Hydrochemical classification and nitrate contamination of the Barreiras unconfined aquifer in Capit o Pocinho river basin of the mid Guamá river region in eastern Amazonia
Paulo Pontes Araújo,Francisco de Assis Oliveira,Itabaraci Nazareno Cavalcante,Joaquim Carlos Barbosa Queiroz
Ambiente e água : An Interdisciplinary Journal of Applied Science , 2011,
Abstract: The Capit o Pocinho river basin at the northeastern Pará constitutes one important area of orange production in Brazil, with use of herbicides and fertilizers in the management practice. This research analyzed the diffusion of nitrate ions and classified the occurrence of the most important ions. To collect the samples, 16 monitoring wells were dug in the citrus plantation in the Capit o Pocinho village. Water samples were collected during the wet and dry seasons of 2009. Even though the levels of nitrate detected were below the Maximum Allowable Value (MAV) of mg L-1 in all wells analyzed, there was evidence of nitrification in 60% of the wells. In 30% of the area surveyed, the levels of nitrate were higher than 2 mg L-1. The Na+, K+, Ca2+, Mg2+, HCO3- and NO3- showed a significant relation (p <0.05), while for the multivariate analyses of the remaining ions, the relationships were not significant at 95% confidence level and as well as for the population mean of each variable. The shallow ground waters of the Barreiras unconfined aquifer were classified as calcic bicarbonate and mixed.
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