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Search Results: 1 - 10 of 687 matches for " Demóstenes; "
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Videografia Aérea Multiespectral em Silvicultura Urbana / Aerial Multiespectral Videography in Urban Forestry
Demóstenes Ferreira da Silva Filho
Ambiência , 2006,
Abstract: Admitindo-se como hipótese básica a possibilidade do uso de imagens aéreas multiespectrais para classifica o automática em classes de vegeta o, objetivou-se, mediante compara es estatísticas entre dados de solo e videografia aérea multiespectral, avaliar a aplica o e uso de imagens multiespectrais de alta resolu o para identifica o, classifica o e quantifica o das estruturas urbanas, cobertura vegetal proporcionada pelas árvores. Após sobrev o e mosaico, foram feitas análises estatísticas (teste t) entre medidas de terrenos e ruas e as mesmas medi es obtidas do mosaico corrigido. Foram feitas classifica es automáticas supervisionadas com treinadores e auditores em alvos intra-urbanos da cidade de Piracicaba nas imagens de videografia. Foram obtidos resultados estatísticos para a videografia (Kappa acima de 80% e exatid o geral acima de 88%) que demonstram a efetividade do mapeamento temático e viabilidade do uso da videografia para caracteriza o da estrutura intra-urbana em classifica es supervisionadas. Foi avaliada a possibilidade de identifica o de espécies arbóreas usando classificadores em imagem multiespectral com a possibilidade desse uso, principalmente quando existe uma amplia o da resolu o temporal.
Uso de indicadores de diversidade na adefini??o de plano de manejo de aboriza??o viária de águas de S?o Pedro - SP
Silva Filho, Demóstenes Ferreira da;Bortoleto, Silvana;
Revista árvore , 2005, DOI: 10.1590/S0100-67622005000600017
Abstract: few brazilian cities have an effective planning for street arborization, comprising the objectives to be achieved and possible qualitative and quantitative goals. another problem of brazilian cities is the low species diversity, prevailing species homogeneity, which may lead to great losses of trees due to the incidence of specific pests or diseases. the richness or diversity indexes are useful as diversity indicators and can be useful in management decision making. the shannon-wiener and the odum indexes were evaluated by means of carrying out a street census in aguas de sao pedro resort. maximum and minimum diversity indexes were calculated, allowing the quantification of species and number of trees in each street, providing the foundation of a management plan, which included the introduction of new species and new individuals, removal of trees and intervention priorities.
Profile of the back school implanted in Brazil Perfil das escolas de posturas implantadas no Brasil
Carla Bianca da Silva Santos,Demóstenes Moreira
Semina : Ciências Biológicas e da Saúde , 2009,
Abstract: This essay presents the establishment of the “Back School” in Brazil and how it has been used as a prevention and treatment form of the spine pains since its foundation in 1969. In Brazil, the results of various studies on the subject have varied consequences which can question its effectiveness. In search of a profile and the need to know the effects on this program, it was necessary to review the literature on the establishment and spreading of the “Back School” in Brazil, the several changes and adjustments that have occurred for years, the resources used, where this type of School has been established, and also the results presented by each one of them concerning their effectiveness in patients with chronic low back pain. Este artigo retrata a implanta o da “Escola de Postura” no Brasil e os procedimentos por ela propostas utilizada como forma de preven o e tratamento das algias da coluna, desde sua cria o, em 1969. No Brasil, os resultados de vários estudos realizados acerca do assunto trazem resultados variados o que pode por em dúvida a quest o de sua eficácia. Busca-se fixar o perfil da escola, devido às necessidades de se conhecer os efeitos deste programa, e, assim, efetuou-se uma revis o da literatura acerca da implanta o e difus o da “Escola de Postura” no Brasil, as diversas modifica es e adapta es ocorridas ao longo dos anos, os recursos utilizados, os locais em que ela tem sido implantada e, também, os resultados apresentados por cada uma delas com rela o a sua eficácia em pacientes com lombalgia cr nica.
Infección por Mycobacterium Tuberculosis en pacientes infectados por el virus de la inmunodeficiencia humana
Morales Aguirre, José Juan;Ornelas Carsolio, María Elena;Gómez Barreto, Demóstenes;
Boletín médico del Hospital Infantil de México , 2004,
Abstract: tuberculosis (tb) is one of the most common infection observed in patients infected or not infected by hiv; hiv infected patients have a 50-fold risk than non-infected patients to develop tb; it is worldwide estimated that 8 millions of persons are co-infected with tb and hiv. infected hiv patients with cd4 cells over 15% presents a clinical picture similar to non-infected cases; in severe inmunodeficient patients, clinical manifestations are hidden by the poor inflammatory response. on the other hand, patients co-infected with tb and hiv have a higher risk to develop diseminated tb forms, relapses, to be affected by multi-drug resistant tb, and to present adverse anti-fimic reactions. early prophylactic management are useful to prevent tb in hiv infected patients.
The effect of cover crop and crop rotation on soil water storage and on sorghum yield
Azevedo, Demóstenes Marcos Pedrosa de;Landivar, Juan;Vieira, Robson Macedo;Moseley, Daryl;
Pesquisa Agropecuária Brasileira , 1999, DOI: 10.1590/S0100-204X1999000300010
Abstract: crop rotation and cover crop can be important means for enhancing crop yield in rainfed areas such as the lower coastal bend region of texas, usa. a trial was conducted in 1995 as part of a long-term cropping experiment (7 years) to investigate the effect of oat (avena sativa l.) cover and rotation on soil water storage and yield of sorghum (sorghum bicolor l.). the trial design was a rcb in a split-plot arrangement with four replicates. rotation sequences were the main plots and oat cover crop the subplots. cover crop reduced sorghum grain yield. this effect was attributed to a reduced concentration of available soil n and less soil water storage under this treatment. by delaying cover termination, the residue with a high c/n acted as an n sink through competition and/or immobilization instead of an n source to sorghum plants. crop rotation had a significantly positive effect on sorghum yield and this effect was attributed to a significantly larger amount of n concentration under these rotation sequences.
For?a de preens?o palmar em crian?as e adolescentes saudáveis
Moura, Patrícia Martins de L. S.;Moreira, Demóstenes;Caixeta, Ana Paula L.;
Revista Paulista de Pediatria , 2008, DOI: 10.1590/S0103-05822008000300014
Abstract: objective: to review the literature regarding hand grip strength in healthy children and teenagers with four to 18 years old. data sources: databases medline, lilacs and scielo were searched for studies published from 2000 to 2007, using the keywords: grasp, hand, strength, grip, child and adolescent. data synthesis: measures of hand grip strength are important to provide an objective index of the functional integrity of the upper limbs. studies evaluating the hand grip strength have been published since 1956, however the majority of them enrolled adults (19 to 44 years-old) and middle-age (45 to 64 years-old) subjects. only one article was published in brazil about hand grip strength of children and teenagers. most studies try to associate hand grip strength and anthropometric variables. conclusions: prospective randomized trials with large number of patients are needed to evaluate the hand grip strength in brazilian children and teenagers. boys have hand grip strength greater than girls, especially after 11 years old. the anthropometric factors such as weight and height were significantly associated with hand grip strength.
Acute myocardial infarction: predictors of mortality at a public hospital in the city of Fortaleza, Ceará state
Ribeiro, Demóstenes Gon?alves Lima;Andrade, Pedro José Negreiros de;Paes Júnior, José Nogueira;Saraiva, Lurildo Ribeiro;
Arquivos Brasileiros de Cardiologia , 2003, DOI: 10.1590/S0066-782X2003000600004
Abstract: objective: to identify the clinical and demographic predictors of in-hospital mortality in acute myocardial infarction with elevation of the st segment in a public hospital, in the city of fortaleza, ceará state, brazil. methods: a retrospective study of 373 patients experiencing their first episode of acute myocardial infarction was carried out. of the study patients, 289 were discharged from the hospital (group a) and 84 died (group b). both groups were analyzed regarding: sex; age; time elapsed from the beginning of the symptoms of myocardial infarction to assistance at the hospital; use of streptokinase; risk factors for atherosclerosis; electrocardiographic location of myocardial infarct; and killip functional class. results: in a univariate analysis, group b had a greater proportion of the following parameters as compared with group a: non-killip i functional class; diabetes; age >70 years; infarction of the inferior wall associated with right ventricular impairment; time between symptom onset and treatment at the hospital >12 h; anteroseptal or extensive anterior infarction; no use of streptokinase; and no tobacco use. in a multivariate logistic regression analysis, only non-killip i functional class, diabetes, and age >70 years persisted as independent factors for death. conclusion: non-killip i functional class, diabetes, and age >70 years were independent predictors of mortality in acute myocardial infarction with elevation of the st segment.
Compara??o entre videografia e fotografia aérea para diagnóstico da vegeta??o em ambiente urbano de Piracicaba, SP
Alvarez, Ivan André;Silva Filho, Demóstenes Ferreira da;Couto, Hilton Thadeu Zarate do;Polizel, Jefferson Lordello;
Revista árvore , 2010, DOI: 10.1590/S0100-67622010000400014
Abstract: in urban planning, a good diagnosis of the presence of vegetation serves as a basis to draw up a plan of action to implant green spaces and manage the existing tree cover. this study obtained the plant cover by urban areas index (pcuai) and by greenery per inhabitant index (gii). videography was compared to aerial photography of the same area in the city of piracicaba, s?o paulo state, brazil, by means of the general exactness and kappa index obtained by sig programs. the values obtained were: pcuai = 18.41% (aerial photography) and 16.48% (videography); gii = 116.93m2/inhab (aerial photography) and 65.21 m2/inhab (videography). the pcuai and gii showed that the studied area had a reasonable percentage of greenery. videography was shown to be viable as an alternative means of obtaining plant cover data, especially sidewalk trees cover.
Acute myocardial infarction: predictors of mortality at a public hospital in the city of Fortaleza, Ceará state
Ribeiro Demóstenes Gon?alves Lima,Andrade Pedro José Negreiros de,Paes Júnior José Nogueira,Saraiva Lurildo Ribeiro
Arquivos Brasileiros de Cardiologia , 2003,
Abstract: OBJECTIVE: To identify the clinical and demographic predictors of in-hospital mortality in acute myocardial infarction with elevation of the ST segment in a public hospital, in the city of Fortaleza, Ceará state, Brazil. METHODS: A retrospective study of 373 patients experiencing their first episode of acute myocardial infarction was carried out. Of the study patients, 289 were discharged from the hospital (group A) and 84 died (group B). Both groups were analyzed regarding: sex; age; time elapsed from the beginning of the symptoms of myocardial infarction to assistance at the hospital; use of streptokinase; risk factors for atherosclerosis; electrocardiographic location of myocardial infarct; and Killip functional class. RESULTS: In a univariate analysis, group B had a greater proportion of the following parameters as compared with group A: non-Killip I functional class; diabetes; age >70 years; infarction of the inferior wall associated with right ventricular impairment; time between symptom onset and treatment at the hospital >12 h; anteroseptal or extensive anterior infarction; no use of streptokinase; and no tobacco use. In a multivariate logistic regression analysis, only non-Killip I functional class, diabetes, and age >70 years persisted as independent factors for death. CONCLUSION: Non-Killip I functional class, diabetes, and age >70 years were independent predictors of mortality in acute myocardial infarction with elevation of the ST segment.
Videogra a digital na estimativa de carbono em orestas implantadas com espécies nativas / Estimation of carbon in forests established with native species using digital videography
Hilton Thadeu Zarate do Couto,Guilherme do Couto Justo,Jefferson Lordelo Polizel,Demóstenes Ferreira da Silva Filho
Ambiência , 2008,
Abstract: O objetivo do presente trabalho é utilizar a videogra a digital como ferramenta para a estimativa do carbono em orestas implantadas com essências nativas, utilizando para isso o índice de vegeta o NDVI. As imagens aéreas foram obtidas com o auxílio de uma aeronave modelo Cessna 180, equipada com o sistema de rastreamento e armazenamento de dados, que inclui uma camera digital multiespectral de alta resolu o.A partir das imagens geradas pelo sistema foi analisado o índice devegeta o ou NDVI do mosaico formado e a idade, em anos, dos plantiosestudados, correlacionando os valores do índice e da idade com dados de biomassa total, biomassa do tronco (DAP maior que 5cm)) carbono e CO2-equivalente obtidos a partir de medi es de DAP realizadas em parcelas permanentes instaladas nas áreas orestais inventariadas. Os modelos obtidos foram gerados utilizando-se da análise de regress o linear múltipla. Os resultados obtidos apresentaram coe cientes dedetermina o (R2) e nível de signi cancia adequado para os modelos que relacionam o NDVI e a idade com as variáveis de biomassa e carbono nas orestas, mostrando que a videogra a digital pode ser uma importante ferramenta na análise e estimativa de biomassa e carbono em orestas implantadas com essências nativas.
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