oalib

Publish in OALib Journal

ISSN: 2333-9721

APC: Only $99

Submit

Any time

2019 ( 1092 )

2018 ( 1620 )

2017 ( 1546 )

2016 ( 2187 )

Custom range...

Search Results: 1 - 10 of 894160 matches for " Silva Nelson A. de S. e "
All listed articles are free for downloading (OA Articles)
Page 1 /894160
Display every page Item
Hipertens o arterial na Ilha do Governador, Rio de Janeiro, Brasil: I. Metodologia
Klein Carlos Henrique,Silva Nelson A. de S. e,Nogueira Armando da R.,Bloch Katia V.
Cadernos de Saúde Pública , 1995,
Abstract: Este primeiro artigo (de uma série de dois) tem como finalidade apresentar os principais aspectos da metodologia empregada em um estudo de popula o para determinar a prevalência de Hipertens o Arterial na Ilha do Governador (regi o administrativa do município do Rio de Janeiro), e estudar sua rela o com outros fatores de risco, inclusive para doen as cardiovasculares, assim como conhecer o seu estado de controle. S o descritos com detalhes o delineamento amostral (amostragem de aglomerados em estratos, segundo renda média domiciliar) e os instrumentos de coleta de dados. S o apresentados, ainda, indicadores de desempenho no trabalho de campo e do controle de qualidade.
Letalidade e complica??es da cirurgia de revasculariza??o miocárdica no Rio de Janeiro, de 1999 a 2003
Oliveira, Thaís Mendon?a Lips de;Oliveira, Gláucia Maria Moraes de;Klein, Carlos Henrique;Souza e Silva, Nelson Albuquerque de;Godoy, Paulo Henrique;
Arquivos Brasileiros de Cardiologia , 2010, DOI: 10.1590/S0066-782X2010005000091
Abstract: background: coronary artery bypass grafting (cabg) is a consolidated procedure for the treatment of ischemic heart diseases (ihds), which requires continuous assessment. objective: to assess the quality of cabg surgery by reviewing patients' clinical characteristics, mortality rates up to one year after hospital discharge, primary causes of death and postoperative complications, at four public hospitals in rio de janeiro from 1999 to 2003. methods: cabg patient charts were randomly selected. a retrospective review was conducted to collect data on clinical characteristics, complications and deaths from patient medical charts and statements of death (sds). mortality rates were estimated for the hospitalization period and for up to one year after hospital discharge. results: the prevalence of preoperative patient characteristics were: women: 31.9%; arterial hypertension: 90.7%; dyslipidemia: 67.4%; diabetes: 37.2%; current smoking status: 22.9%; obesity: 18.3%; chronic obstructive pulmonary disease: 8.2%; prior stroke: 5.8%; extracardiac artery disease: 12.7%; elevation of creatinine levels: 4.1%; critical preoperative status: 3.7%; recent acute myocardial infarction: 23.5%; unstable angina: 40.8%; acute coronary syndrome: 50.0%; prior cabg: 2.4%; left ventricular dysfunction: 27.3%; left main coronary artery lesion: 3.9%; and associated with lesion in another system: 19.8%. in-hospital mortality rates ranged from 7.0% to 14.3%, and up to one year after hospital discharge from 8.5% to 20.2%. ischemic heart disease (ihd) accounted for more than 80% of the deaths, and the most frequent complications after surgery were hemorrhage or post-procedural low cardiac output. sixty percent of the patients who died had five or more complications, whereas 40% of those who survived had none. conclusion: mortality and complication rates were high. even among those patients who survived, complications were more frequent than expected.
Hipertens?o arterial na Ilha do Governador, Rio de Janeiro, Brasil: I. Metodologia
Klein, Carlos Henrique;Silva, Nelson A. de S. e;Nogueira, Armando da R.;Bloch, Katia V.;Campos, Lúcia Helena S.;
Cadernos de Saúde Pública , 1995, DOI: 10.1590/S0102-311X1995000200003
Abstract: the aim of this paper (first of a series of two) is to present the main methodological aspects used in a cross-sectional study whose proposals were to establish the prevalence of arterial hypertension in adults in ilha do governador (a district of the city of rio de janeiro, brazil), and to examine its relationship to other risk factors, including those for cardiovascular diseases, so as to establish its control status. sampling design (of clusters in strata, according to mean household income) is described in detail, in addition to measurement methods, and training of observers. indicators of performance in field work and quality control are also presented as results of the application of the metodology of study.
Hipertens?o arterial na Ilha do Governador, Brasil: II. Prevalência
Klein, Carlos Henrique;Silva, Nelson A. de Souza e;Nogueira, Armando da R.;Bloch, Katia V.;Campos, Lúcia Helena S.;
Cadernos de Saúde Pública , 1995, DOI: 10.1590/S0102-311X1995000300015
Abstract: the aim of this paper (the second of two) is to present the basic results of a cross?sectional study on arterial hypertension in adults in ilha do governador (a district of the city of rio de janeiro, brazil), with a representative sample of the population, stratified by the census tracts' mean household incorre (low, median, and high). overall, prevalence of uncontrolled hypertension in ilha do governador was 16.1% (c.i. of 95%: 13.4 to 18.9%), and with the inclusion of controlled hypertensive individuals this figure rose to 24.9% (c i. of 95%: 21.7 to 28.7%). under both criteria (whether including controlled hypertensive individuais or not), higher prevalences were from low?incorre strata, while lower ones were from the high?incorre strata. however, it was only possible to reject the hypothesis of strata homogeneity of prevalences (including controlled hypertensives), and even then at a 10% level of significance, when the confounding effect of age was adjusted. proportionally, women with hypertension appear to control their blood pressure levels better than men in all age brackets.
Mortalidade por doen?as cardiovasculares em três estados do Brasil de 1980 a 2002
Oliveira,Gláucia M. M. de; Klein,Carlos H.; Souza e Silva,Nelson A. de;
Revista Panamericana de Salud Pública , 2006, DOI: 10.1590/S1020-49892006000200003
Abstract: objective: to evaluate and compare adult mortality from diseases of the circulatory system (cds), especially ischemic heart disease (ihd) and cerebrovascular disease (cvd), from 1980 through 2002 in the brazilian states of rio de janeiro, rio grande do sul, and s?o paulo and their capital cities (respectively rio de janeiro, porto alegre, and s?o paulo), taking into account the impact of deaths due to ill-defined causes on mortality rates. method: we estimated mortality rates (crude and adjusted by age and sex) from cds overall and from ihd and cvd among individuals aged 20 years or older. these rates were weighted with a portion of the deaths from ill-defined or unknown causes, in the same proportion as deaths from cds, ihd, and cvd in relation to deaths overall, excluding deaths from ill-defined causes. using linear regression models, we also estimated the mean values of and annual differences in the weighted adjusted mortality rates. the reference population was that of the state of rio de janeiro in 2000.results: the annual decline in the weighted adjusted mortality rates from cds ranged from -13.1 per 100 000 individuals in the state of rio de janeiro to -8.7 per 100 000 in the city of s?o paulo. for ihd, the annual declines were greatest in the city of rio de janeiro (-5.0 per 100 000) and the state of rio de janeiro (-4.5 per 100 000), and smallest in the state of rio grande do sul (-2.8 per 100 000) and the city of s?o paulo (-2.7 per 100 000). with cvd, the range that was found extended from -6.5 per 100 000 in the state of rio de janeiro to -2.9 per 100 000 in the city of porto alegre.conclusion: the decreases in weighted adjusted mortality rates from cds, ihd, and cvd occurred after 1980, so it is unlikely that the declines resulted from controlling risk factors or from the practice of myocardial revascularization. the decreases might be related to a period of strong economic development preceding the declines, which translated into improved living condit
Hipertens o arterial na Ilha do Governador, Brasil: II. Prevalência
Klein Carlos Henrique,Silva Nelson A. de Souza e,Nogueira Armando da R.,Bloch Katia V.
Cadernos de Saúde Pública , 1995,
Abstract: Este segundo artigo (de uma série de dois) tem como finalidade apresentar apenas os resultados básicos de um estudo, em amostra representativa de popula o, sobre Hipertens o Arterial na Ilha do Governador (regi o administrativa do município do Rio de Janeiro), em três estratos de acordo com a renda média domiciliar (baixa, média e alta) de setores censitários. No conjunto da Ilha do Governador a prevalência de hipertens o n o controlada foi de 16,1 % (I.C. de 95%: 13,4 a 18,9%), e incluindo-se os hipertensos controlados, este índice subiu para 24,9% (I.C. de 95%: 21,7 a 28,1 %). Por ambos os critérios (incluindo ou n o os hipertensos controlados), as prevalências mais elevadas foram as do estrato de renda baixa e as menores do estrato de renda alta. Porém, só foi possível rejeitar a homogeneidade de prevalências de hipertens o (incluindo os controlados) entre os estratos, e ainda assim para uma significancia de 10%, quando se ajustou o efeito de confus o da idade. As mulheres hipertensas parecem controlar em maior propor o seus níveis de press o arterial em qualquer faixa etária dos adultos, do que os homens.
Tree height integrated into pantropical forest biomass estimates
T. R. Feldpausch, J. Lloyd, S. L. Lewis, R. J. W. Brienen, M. Gloor, A. Monteagudo Mendoza, G. Lopez-Gonzalez, L. Banin, K. Abu Salim, K. Affum-Baffoe, M. Alexiades, S. Almeida, , I. Amaral, A. Andrade, L. E. O. C. Arag o, A. Araujo Murakami, E. J. M. M. Arets, L. Arroyo, G. A. Aymard C., T. R. Baker, O. S. Bánki, N. J. Berry, N. Cardozo, J. Chave, J. A. Comiskey, E. Alvarez, A. de Oliveira, A. Di Fiore, G. Djagbletey, T. F. Domingues, T. L. Erwin, P. M. Fearnside, M. B. Fran a, M. A. Freitas, N. Higuchi, E. Honorio C., Y. Iida, E. Jiménez, A. R. Kassim, T. J. Killeen, W. F. Laurance, J. C. Lovett, Y. Malhi, B. S. Marimon, B. H. Marimon-Junior, E. Lenza, A. R. Marshall, C. Mendoza, D. J. Metcalfe, E. T. A. Mitchard, D. A. Neill, B. W. Nelson, R. Nilus, E. M. Nogueira, A. Parada, K. S.-H. Peh, A. Pena Cruz, M. C. Pe uela, N. C. A. Pitman, A. Prieto, C. A. Quesada, F. Ramírez, H. Ramírez-Angulo, J. M. Reitsma, A. Rudas, G. Saiz, R. P. Salom o, M. Schwarz, N. Silva, J. E. Silva-Espejo, M. Silveira, B. Sonké, J. Stropp, H. E. Taedoumg, S. Tan, H. ter Steege, J. Terborgh, M. Torello-Raventos, G. M. F. van der Heijden, R. Vásquez, E. Vilanova, V. A. Vos, L. White, S. Willcock, H. Woell,O. L. Phillips
Biogeosciences (BG) & Discussions (BGD) , 2012,
Abstract: Aboveground tropical tree biomass and carbon storage estimates commonly ignore tree height (H). We estimate the effect of incorporating H on tropics-wide forest biomass estimates in 327 plots across four continents using 42 656 H and diameter measurements and harvested trees from 20 sites to answer the following questions: 1. What is the best H-model form and geographic unit to include in biomass models to minimise site-level uncertainty in estimates of destructive biomass? 2. To what extent does including H estimates derived in (1) reduce uncertainty in biomass estimates across all 327 plots? 3. What effect does accounting for H have on plot- and continental-scale forest biomass estimates? The mean relative error in biomass estimates of destructively harvested trees when including H (mean 0.06), was half that when excluding H (mean 0.13). Power- and Weibull-H models provided the greatest reduction in uncertainty, with regional Weibull-H models preferred because they reduce uncertainty in smaller-diameter classes (≤40 cm D) that store about one-third of biomass per hectare in most forests. Propagating the relationships from destructively harvested tree biomass to each of the 327 plots from across the tropics shows that including H reduces errors from 41.8 Mg ha 1 (range 6.6 to 112.4) to 8.0 Mg ha 1 ( 2.5 to 23.0). For all plots, aboveground live biomass was 52.2 Mg ha 1 ( 82.0 to 20.3 bootstrapped 95% CI), or 13%, lower when including H estimates, with the greatest relative reductions in estimated biomass in forests of the Brazilian Shield, east Africa, and Australia, and relatively little change in the Guiana Shield, central Africa and southeast Asia. Appreciably different stand structure was observed among regions across the tropical continents, with some storing significantly more biomass in small diameter stems, which affects selection of the best height models to reduce uncertainty and biomass reductions due to H. After accounting for variation in H, total biomass per hectare is greatest in Australia, the Guiana Shield, Asia, central and east Africa, and lowest in east-central Amazonia, W. Africa, W. Amazonia, and the Brazilian Shield (descending order). Thus, if tropical forests span 1668 million km2 and store 285 Pg C (estimate including H), then applying our regional relationships implies that carbon storage is overestimated by 35 Pg C (31–39 bootstrapped 95% CI) if H is ignored, assuming that the sampled plots are an unbiased statistical representation of all tropical forest in terms of biomass and height factors. Our results show that tree H is an important allometric factor that needs to be included in future forest biomass estimates to reduce error in estimates of tropical carbon stocks and emissions due to deforestation.
Níveis de lisina para suínos machos castrados selecionados geneticamente para deposi??o de carne magra na carca?a, dos 95 aos 122 kg
Arouca, Cláudio Luiz Corrêa;Fontes, Dalton de Oliveira;Bai?o, Nelson Carneiro;Silva, Martinho de Almeida e;Silva, Francisco Carlos de Oliveira;
Ciência e Agrotecnologia , 2007, DOI: 10.1590/S1413-70542007000200038
Abstract: an experiment was conducted to determine lysine requirements of barrows, during the late-finishing phase, to evaluate the effects of lysine levels on performance and carcass characteristics of animals. fifty hybrid pigs (ag-pic 412 x c-22), averaging 95.39 ± .85 kg initial weight and 122.29 ± 3.02 kg final weight were used in a completely randomized block design with five dietary treatments ranging from .50 to .90% of total lysine (.10% increments), five replicates and two animals per experimental unit. initial body weight and relationship coefficient were used to establish the blocks. quadratic effect of lysine level on average daily gain, feed conversion, daily lysine intake and daily lean gain was observed. there was no effect of treatments on daily feed intake, p1 backfat thickness, p2 backfat thickness, loin depth, lean percentage, carcass yield, carcass length, carcass length brazilian method, 10th rib fat depth, last rib fat depth and ham percentage. based on these results, it was concluded that the total dietary lysine requirement for barrows with high genetic potential for lean gain, from 95 to 122 kg, is 0.72% total lysine, which corresponds to approximately 25.46 g/day of lysine intake.
Technical Results from the Surface Run of the LUX Dark Matter Experiment
LUX Collaboration,D. S. Akerib,X. Bai,E. Bernard,A. Bernstein,A. Bradley,D. Byram,S. B. Cahn,M. C. Carmona-Benitez,J. J. Chapman,T. Coffey,A. Dobi,E. Dragowsky,E. Druszkiewicz,B. Edwards,C. H. Faham,S. Fiorucci,R. J. Gaitskell,K. R. Gibson,M. Gilchriese,C. Hall,M. Hanhardt,M. Ihm,R. G. Jacobsen,L. Kastens,K. Kazkaz,R. Knoche,N. Larsen,C. Lee,K. T. Lesko,A. Lindote,M. I. Lopes,A. Lyashenko,D. C. Malling,R. Mannino,D. N. McKinsey,D. Mei,J. Mock,M. Moongweluwan,M. Morii,H. Nelson,F. Neves,J. A. Nikkel,M. Pangilinan,K. Pech,P. Phelps,A. Rodionov,T. Shutt,C. Silva,W. Skulski,V. N. Solovov,P. Sorensen,T. Stiegler,M. Sweany,M. Szydagis,D. Taylor,M. Tripathi,S. Uvarov,J. R. Verbus,L. de Viveiros,N. Walsh,R. Webb,J. T. White,M. Wlasenko,F. L. H. Wolfs,M. Woods,C. Zhang
Physics , 2012, DOI: 10.1016/j.astropartphys.2013.02.001
Abstract: We present the results of the three-month above-ground commissioning run of the Large Underground Xenon (LUX) experiment at the Sanford Underground Research Facility located in Lead, South Dakota, USA. LUX is a 370 kg liquid xenon detector that will search for cold dark matter in the form of Weakly Interacting Massive Particles (WIMPs). The commissioning run, conducted with the detector immersed in a water tank, validated the integration of the various sub-systems in preparation of the underground deployment. Using the data collected, we report excellent light collection properties, achieving 8.4 photoelectrons per keV for 662 keV electron recoils without an applied electric field, measured in the center of the WIMP target. We also find good energy and position resolution in relatively high-energy interactions from a variety of internal and external sources. Finally, we have used the commissioning data to tune the optical properties of our simulation and report updated sensitivity projections for spin-independent WIMP-nucleon scattering.
Resonant tunneling of polarized electrons through nonmagnetic III-V semiconductor multiple barriers
Araújo, C. Moysés;Silva, A. Ferreira da;Silva, E. A. de Andrada e;
Brazilian Journal of Physics , 2002, DOI: 10.1590/S0103-97332002000200019
Abstract: the quantum transport of spin-polarized electrons across nonmagnetic iii-v semiconductor multiple barriers is considered theoretically. we have calculated the spin dependent transmission coeficient, for conducting electrons transversing lattice-matched in0. 53ga0. 47as/gaas0. 5sb0: /in0. 53ga0. 47as/ inp/in0. 53ga0. 47as nanostructures with different numbers of asymmetric double barriers, as a function of electron energy and angle of incidence. spin-orbit split resonances, due to the rashba term, are observed. the envelope function approximation and the kane k ×p model for the bulk are used. for an unpolarized incident beam of electrons, we also obtain the spin polarization of the transmitted beam. the formation of spin dependent minibands of energy with nonzero transmission is observed.
Page 1 /894160
Display every page Item


Home
Copyright © 2008-2017 Open Access Library. All rights reserved.