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Search Results: 1 - 10 of 167105 matches for " Jo?o Carlos;Barreto "
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Modelo para avalia??o econ?mica comparativa entre alternativas de sistemas de fixa??o com elementos roscados
Piekarski, Joo Carlos Barreto;Cziulik, Carlos;
Gest?o & Produ??o , 2009, DOI: 10.1590/S0104-530X2009000300011
Abstract: the demands for quality and delivery time have been growing in the majority of manufacturing sectors. however, these demands are strongly dependent on previous stages decisions, mostly those related to the product development process. several of these decisions are influenced by the experience or personal preferences from the design team. additionally, most products depend on the assembly processes, which can assume different configurations (e.g. permanent (riveting) or non-permanent (fastening) joining solutions). from the environment point of view, the reversible systems perform a fundamental role during the product development process. the choice for a fastening system occurs during the design stage. thus, this paper aims at the development of a model that supports the decision making process when choosing reversible fastening systems, based on the economic aspects of the manufacturing/assembling process examined. the entry data and model structure are well adhered to the industrial reality, theoretical parameters, and data from the experiments. the model considers the costs factors originated from: i/ purchasing and storage; ii/ manufacturing; iii/ assembling; and iv/ maintenance; which are the main stages of a component life cycle. the set of equations that support the model is also presented. a preliminary model test illustrates its capabilities for capturing the cost differences amongst fastening systems for a specific assembly, from parameters defined at early stages of the design process.
Estudo controlado do uso endovenoso de sulfato de magnésio ou de salbutamol no tratamento precoce da crise de asma aguda grave em crian?as
Santana, Joo Carlos;Barreto, Sérgio Saldanha Menna;Piva, Jefferson Pedro;Garcia, Pedro Celiny;
Jornal de Pediatria , 2001, DOI: 10.1590/S0021-75572001000400009
Abstract: objective: to study the efficacy of intravenous magnesium sulfate and intravenous salbutamol in the treatment of severe asthma in children. methods: randomized, double-blind, placebo-controlled clinical trial, including children above 2 years of age with severe acute asthma admitted to the observation ward of the pediatric intensive care unit of hospital s?o lucas. all patients received conventional treatment (oxygen, corticoids, beta-adrenergics) on admission, and later received one of the following solutions: a) ivmg (50 mg/kg); b) intravenous salbutamol (20 μg/kg); c) saline solution (1 ml/kg/min). clinical assessments, electrolyte concentration, and arterial blood gas analyses were recorded before intravenous infusion and one hour after that. results: fifty patients participated in this study (of whom 53% were females, mean age = 4.5 years). there were no significant differences among the three groups. the group that received ivmg presented lower blood pressure during administration, which reached normal levels one hour afterwards, along with an increase in serum magnesium (p < 0,001) and serum ph, and reduction of paco2. the group that received intravenous salbutamol had lower respiratory rate (p = 0.05) and higher blood pressure (p = 0.01), and one hour after administration, these patients showed decreased respiratory rate (p = 0.02); lower levels of serum potassium (p = 0.009); higher ph, and reduced paco2. this group required fewer nebulizations (p = 0.009), fewer nebulizations per day (p<0.001) and less oxygen therapy than the ivmg and placebo groups. acidosis was more persistent (p < 0.01) in the placebo group. no difference as to the length of hospital stay was observed in any of the three groups. artificial ventilation was necessary in 10% of the patients. conclusions:the early intravenous administration of magnesium sulfate, especially salbutamol, achieved a rapid clinical response with excellent prognosis and no significant side effects.
Fitomassa de adubos verdes e controle de plantas daninhas em diferentes densidades populacionias de leguminosas
Fernandes, Marcelo Ferreira;Barreto, Ant?nio Carlos;Emídio Filho, Joo;
Pesquisa Agropecuária Brasileira , 1999, DOI: 10.1590/S0100-204X1999000900009
Abstract: the objective of this study was to evaluate the dry matter yields of calopogonium mucunoides, stizolobium aterrimum, stizolobium deeringeanum variety "rajada", canavalia ensiformis, cajanus cajan, crotalaria breviflora and c. spectabilis in relation to the sowing densities of 10, 20, 40, 80 and 160 seeds m-2, and the yield of weeds grown in these legume densities. this study was carried out from may to august 1996, in a coastal tableland area of the antonio martins experimental station (emdagro/embrapa-cpatc), at lagarto, state of sergipe, brazil. the number of survival plants and the dry matter yields were determined when each species reached the flowering stage. the highest increments of dry matter yield in response to increasing levels of sowing density were observed in plants of crotalaria spectabilis and c. breviflora followed by c. mucunoides, s. aterrimum and s. deeringeanum. a negative response to the increasing sowing densities was observed in canavalia ensiformis and sowing densities did not affect the dry matter yield of cajanus cajan plants. linear and positive responses of c. spectabilis, c. breviflora and c. mucunoides, and quadratic responses of c. ensiformis, c. cajan and s. deeringeanum were obtained for number of plants in response to increasing sowing density. no equations were found to express the relation between the number of survival plants and sowing densities of s. aterrimum, but the survival of this species at high populations was very low. s. aterrimum and c. ensiformis showed the best weed inhibition, even in the lower sowing densities.
Retornos da educa??o e o desequilíbrio regional no Brasil
Manso, Carlos Alberto;Barreto, Flávio Ataliba;Fran?a, Joo Mário S. de;
Revista Brasileira de Economia , 2010, DOI: 10.1590/S0034-71402010000200003
Abstract: the problem of brazilian regional disequilibrium has usually been treated in the national literature from investigations using income and/or gdp percapita as a variable of analysis. for communities with low levels of inequality, this procedure is a good representation of the social welfare. however, for economies with high levels of poverty and inequality, the use of income or gdp cannot be appropriate. accordingly, this article discusses if the approximation of per capita income between the northeast and southeast brazil has also occurred in terms of social welfare. to this, two measures of social welfare are used: sen (1977) and kakwani e son (2008). the results suggest as occurs with per capita income, there has also been assimilation of welfare, considering sen's proposal. however, when it is considered the movement of the poorest income, present in the second index, there is a distance between the two regions. the analyses are made for the period 1995 to 2007. finally, it was identified that the productivity gains of workers belonging to poor families in the southeast were the main responsible for this gap.
Rea??o de Wassermann em gestantes atendidas em hospital de Ribeir?o Preto (Brasil) no período de 1976-1981
Barreto,Sueli Marlene Visentini; Gon?alves,Arthur Lopes; Costa,Joo Carlos da;
Revista de Saúde Pública , 1985, DOI: 10.1590/S0034-89101985000200002
Abstract: the incidence of positive wassermann (w) test in sera of pregnant women in the "hospital das clínicas", medical school of ribeir?o preto, university of s. paulo, was determined during the period 1976 to 1981, in order to study its relationship to race, age, place of origin and outcome of pregnancies. there were 16,290 pregnant women attended in this period; 710 (4.4%) were serologically positive, and, of these, 39 aborted and 671 became parturients but only 497 gave birth in this hospital. about 70% of the pregnant women were racially considered "white" and 30% "non-white", for these latter the incidence of positive w test was 6.3% as against 3.5% in the "whites". most of the patients were from ribeir?o preto, sp, and the age-group 26-30 years showed the highest incidence (5.1%) of positive tests. the incidence of positive w was higher in the 2nd trienium (1979/81) than in the first one. about 70% of the 497 positive w test women that gave birth in this hospital attended prenatal clinic but only 40% of them were treated before the delivery. in the "treated" group the incidence of congenital syphilis (confirmed or dubious cases) was 20% as against 61% in the group of "non-treated" mothers. as all the groups of patients showed significant incidence of seropositivity or the disease, it is recommended to screen every pregnant women at each trimester of pregnacy and at delivery, so as to give early treatment for syphilis and to avoid its congenital transmission and sequelae.
Pesquisa de anticorpos para sífilis e toxoplasmose em recém-nascidos em hospital de Ribeir?o Preto, SP, Brasil
Barreto,Sueli Marlene Visentini; Costa,Joo Carlos da; Gon?alves,Arthur Lopes;
Revista de Saúde Pública , 1987, DOI: 10.1590/S0034-89101987000100009
Abstract: tests were performed for the determination of igm levels (by simple radial immunodiffusion) and antibodies for syphilis (fta-abs-igg and igm, vdrl and wassermann (w)) and toxoplasmosis (indirect immunofluorescence igg (ifi-igg) and igm (ifi-igm)) in 408 new-borns (nb) sera at the university hospital of the faculty of medicine of ribeir?o preto, usp, selected at random from july 1 to october 9, 1981. only 3 nb showed greater than normal values of igm levels in serum, but no clinical or laboratory diagnosis of congenital syphilis or toxoplasmosis was made for them. two hundred and 91 infants (71.3%) were ifi-igg positive for toxoplasmosis and none ifi-igm, before or after chromatography. no clinical diagnosis of congenital toxoplasmosis was made during the period studied. the rheumatoid factor (rf) was determined in order to exclude false-positive results for antibodies of the igm class. all possible false-negative sera to ifi-igm and ifi-igg positive for toxoplasmosis were treated by gel chromatography. only one positive serum for rf was treated with heat-aggregated gamma-globulin before being tested for the presence of igm antibodies. sevem percent of the nb (28) were positive to at least one of the tests for syphilis. fta-abs-igg was positive in 89.3% of them, vdrl in 67.8% and w in 60.7%. only one serum sample was positive for fta-abs-igm. the concordance of positivity between fta-abs-igg and vdrl was 60.7%; 53.6% between fta-abs-igg and w and 60% between vdrl and w. the syphilis-positive sera were compared with the data in the medical records of the respective nb and their mothers. it was shown that among the 28 nb with positive tests for syphilis only 5 3.5 % of them were detected at birth, 3.6% had negative serology and no data were available for 42.9%. clinical and/or serological follow-up disclosed that 2 nb evolved with signs of congenital syphilis, 2 were suspected to have syphilis, and were treated but control serology ruled out this possibility, and no da
BENCHMARKS DE EFICIêNCIA NO PROCESSAMENTO DE PETRóLEO COM PRODUTOS QUíMICOS
Almiro Soares Barreto,Joo Carlos C. B. Soares de Mello
Relatórios de Pesquisa em Engenharia de Produ??o , 2012,
Abstract: This study aims to identify the best manufacturing plants by the criterion of efficiency in the useof chemicals to separate oil, water and gas in a primary processing plant oil. Thus, we evaluated theefficiency of thirty stationary production units operated by a concessionaire of oil in the Campos Basin, in2009. The efficiency was measured with the methodology of Data Envelopment Analysis (DEA) through itsclassical model DEA-CCR, with the help of software called SIAD. The results were identified by analysisunits which are references for use efficiency desemulsificantes for the treatment of crude oil.
Soil attributes under agroecosystems and forest vegetation in the coastal tablelands of northestern Brazil Atributos de solo de agroecossistemas e coberturas florestais dos tabuleiros costeiros do nordeste do Brasil
Joo Bosco Vasconcellos Gomes,Marcelo Ferreira Fernandes,Antonio Carlos Barreto,José Coelho de Araújo Filho
Ciência e Agrotecnologia , 2012, DOI: 10.1590/s1413-70542012000600007
Abstract: This study evaluated the changes occurred in a set of soil attributes, particularly those related to the dynamics of soil organic carbon (SOC), as a function of the replacement of native forest for agricultural ecosystems of regional importance in the coastal tablelands of Northeastern Brazil (orange, coconut, eucalyptus and sugarcane). Six commercial sites under these agroecosystems were compared to neighboring areas of native forest in five areas along this region (Coruripe, Umbaúba, Acajutiba, Cruz das Almas and Nova Vi osa). Soil samples were taken from 0-5 and 5-20 cm depth and analyzed for particle size distribution, bulk density, organic C (OC), particulate organic matter, C in soil solution, microbial biomass C, total cation exchange capacity and water stable aggregates. Linear correlation and multivariate techniques were used for data analysis. The values of base saturation and Al saturation for the 0-20 cm depth layer were also calculated. In all the studied areas, soils under native forest presented better status of physical and chemical attributes than their agroecosystem counterparts, especially in the 0-5 cm layer. For both layers, OC content was the attribute most strongly correlated with the overall changes in all attributes. Unexpectedly, the OC content showed no significant correlation with the sum of silt and clay contents. The set of variables investigated in this study is sensitive to differentiate the quality of soils under perennial and semi-perennial land uses from their counterparts under natural vegetation in the landscapes of the coastal tablelands of Northeastern Brazil. Este trabalho avaliou as altera es de um conjunto de atributos de solos dos tabuleiros costeiros do Nordeste do Brasil, em especial os relacionados à dinamica do C organico (CO), em fun o da substitui o da vegeta o florestal nativa por agroecossistemas de importancia regional (laranja, coco, eucalipto e cana-de-a úcar). Seis sítios comerciais sob esses agroecossistemas foram comparados a áreas vizinhas de mata nativa, em cinco locais de amostragem ao longo dos tabuleiros costeiros (Coruripe, Umbaúba, Acajutiba, Cruz das Almas e Nova Vi osa) Foram coletadas amostras de solo de 0-5 e de 5-20 cm de profundidade para determinar granulometria, densidade do solo, C organico (CO), matéria organica particulada, C da solu o do solo, C da biomassa microbiana, capacidade de troca cati nica e agregados estáveis em água. Para análise dos dados foram realizadas correla es lineares e análises multivariadas. Os valores de satura o por bases e por Al da camada de 0-20
The interpretation of the figure of the prophet Jonah by Michelangelo on the ceiling of the sistine chapel: anatomical urological vision
Reis, Leonardo Oliveira;Zani, Emerson Luis;Alonso, Joo Carlos;Sim?es, Fabiano André;Rejowski, Ronald Finamore;Barreto, Gilson;
International braz j urol , 2012, DOI: 10.1590/S1677-55382012000300004
Abstract: purpose:a detailed analysis in the iconography and pictorial appearance of the scene of the "prophet jonah" painted by the artist michelangelo buonarroti (1475-1564) on the ceiling of the sistine chapel between the years 1508 and 1512. materials and methods:literature review on the italian renaissance period and the life of michelangelo buonarroti and analysis of historical aspects of the evolution of studies of human anatomy in this period and the works of the artist. results:a comparative analysis of the representation of the figure of the fish on the left thigh of "jonah" with a cross section of penis shows a curious similarity. the pictorial and iconographic analysis reveals an intensity of light on the pubic area and the position of the prophet with the legs spread apart and left hand placed on this region. a tube-shaped cloth covers the region and the angel at the side seems to be looking at this anatomical region of "jonah". in fact, sets of iconographic and pictorial relate to the deciphered code. conclusions: this description helps to confirm the relationship of the renaissance art with the human anatomy; science has been much studied in this period. the design of a cross section of the penis is revealed with the two cavernous bodies with the septum between them and the spongy body. considering the circumstances in which michelangelo had painted, subjectivity was fundamental due to religious motivations added to the vigorous implications of a limited scientific knowledge typical of that era.
Bem-estar social, mercado de trabalho e o desequilíbrio regional brasileiro
Manso, Carlos Alberto;Barreto, Flávio Ataliba F. D.;Fran?a, Joo Mário Santos de;
Estudos Econ?micos (S?o Paulo) , 2010, DOI: 10.1590/S0101-41612010000200006
Abstract: this paper contributes to the empirical literature about the brazilian regional disequilibrium, once it examines, in the post-real plan period, the economic performance of each region of the country in terms of pro-poor growth - growth with reduced inequality - and of the social welfare. to this, it is used the methodology present in kakwani, neri and son (2006) to evaluate the behavior of social welfare from the distributions of familiar income and wage income in each region. furthermore, it is investigated the contribution of labor market indicators in the performance of regions. in general, the results indicate that the greatest impacts on employment income and on social welfare were due to the labour force participation rate, and mainly, to increased productivity of workers from 2003, which in turn, were mainly motivated by increases in the average returns from the education of employed persons. however, these gains were not sufficient to establish a pattern of growth more strongly pro-poor in the north and northeast, which could have contributed to a closer in terms of income and welfare of these regions for other brazilian regions.
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