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Registro Completo |
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Biblioteca(s): |
Embrapa Agricultura Digital. |
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Data corrente: |
13/03/1998 |
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Data da última atualização: |
03/08/2007 |
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Autoria: |
CARNEIRO, B. P.; SILVA, C. T.; KAUFMAN, A. E. |
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Título: |
Tetra-Cubes: an algorithm to generate 3D isosurfaces based upon tetrahedra. |
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Ano de publicação: |
1996 |
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Fonte/Imprenta: |
In: SIMPÓSIO BRASILEIRO DE COMPUTAÇÃO GRÁFICA E PROCESSAMENTO DE IMAGENS, 9., 1996, Caxambu. Anais... Caxambu: SBC, 1996. |
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Páginas: |
p.205-210. |
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Idioma: |
Inglês |
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Notas: |
Evento conhecido como: SIBGRAPI. Editado por L. Velho, A. de Albuquerque e R. A. Lotufo. |
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Conteúdo: |
We present the tetra-cubes iso-surface extraction technique. \tTetra-cubes iso-surface extraction technique. Tetra-cubes is similar to the well-know marching-cubes technique, but is basic building block consists of tetrahedral cells instead of cubes. . When the original cells are not tetrahedral cells, tetra-cubes converts them to tetrahedra. We show that our technique is simpler than marching-cubes and does not have ambiguity configurations, leading to simpler iso-surface generation. We advocate the use of tetra-cubes due to its simplicity of implementation and generality. |
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Palavras-Chave: |
Computacao graficaa; Graphic computation; Image processing; Processamentode imagens. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 01343naa a2200217 a 4500
001 1006085
005 2007-08-03
008 1996 bl uuuu u00u1 u #d
100 1 $aCARNEIRO, B. P.
245 $aTetra-Cubes$ban algorithm to generate 3D isosurfaces based upon tetrahedra.
260 $c1996
300 $ap.205-210.
500 $aEvento conhecido como: SIBGRAPI. Editado por L. Velho, A. de Albuquerque e R. A. Lotufo.
520 $aWe present the tetra-cubes iso-surface extraction technique. \tTetra-cubes iso-surface extraction technique. Tetra-cubes is similar to the well-know marching-cubes technique, but is basic building block consists of tetrahedral cells instead of cubes. . When the original cells are not tetrahedral cells, tetra-cubes converts them to tetrahedra. We show that our technique is simpler than marching-cubes and does not have ambiguity configurations, leading to simpler iso-surface generation. We advocate the use of tetra-cubes due to its simplicity of implementation and generality.
653 $aComputacao graficaa
653 $aGraphic computation
653 $aImage processing
653 $aProcessamentode imagens
700 1 $aSILVA, C. T.
700 1 $aKAUFMAN, A. E.
773 $tIn: SIMPÓSIO BRASILEIRO DE COMPUTAÇÃO GRÁFICA E PROCESSAMENTO DE IMAGENS, 9., 1996, Caxambu. Anais... Caxambu: SBC, 1996.
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Registro original: |
Embrapa Agricultura Digital (CNPTIA) |
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 | Acesso ao texto completo restrito à biblioteca da Embrapa Soja. Para informações adicionais entre em contato com valeria.cardoso@embrapa.br. |
Registro Completo
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Biblioteca(s): |
Embrapa Soja. |
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Data corrente: |
30/11/2012 |
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Data da última atualização: |
25/07/2017 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Circulação/Nível: |
A - 1 |
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Autoria: |
NIEMEYER, J. C.; LOLATA, G. B.; CARVALHO, G. M. de; SILVA, E. M. da; SOUSA, J. P.; NOGUEIRA, M. A. |
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Afiliação: |
JÚLIA CARINA NIEMEYER, Universidade Federal da Bahia; GIOVANA BORTOTI LOLATA, UEL; GABRIEL MARTINS DE CARVALHO, Universidade Estadual de Santa Cruz; EDUARDO MENDES DA SILVA., Instituto de Biologia. Universidade Federal da Bahia (UFBA).; JOSÉ PAULO SOUSA., IMAR-CMA, Department of Life Sciences, Faculty of Sciences and Technology, University of Coimbra.; MARCO ANTONIO NOGUEIRA, CNPSO. |
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Título: |
Microbial indicators of soil health as tools for ecological risk assessment of a metal contaminated site in Brazil. |
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Ano de publicação: |
2012 |
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Fonte/Imprenta: |
Applied Soil Ecology, v. 59, p. 96-105, 2012. |
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Idioma: |
Inglês |
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Conteúdo: |
Abstract Microbial and biochemical indicators of soil health were use do assess the ecological and biological activity of soils contaminated with metals at a lead smelter plant and surrounding area in northeast Brazil. Soil respiration, microbial biomass of C and N, acid phosphatase, asparaginase, and density of ammonifying and ammonium-oxidizing microorganisms were positively correlated with soil Organic carbon and/or water content, but showed negative correlations with metal soil.Nitri?cation rate and metabolic quotient (qCO) were positively correlated with metal contamination,suggesting favorable conditions for N loss and 2 microbial stress, respectively. No conditions contents signi?cant correlations were found between metal concentrations in soil and dehydrogenase activity or ammoni?cation rate,considering water content and soil organic carbon as covariables. Soil respiration, microbial biomasses of C and N, dehydrogenase, acid phosphatase, asparaginase activities, and ammonifying microorganisms were positively correlated with percentage vegetation cover, while nitri?cation and ammoni?cation rates were negatively correlated with this parameter. In general, soil respiration, microbial biomass of C and N, acid phosphatase, asparaginase, density of ammonifying and ammonium oxidizing microorganisms,nitri?cation rate and qCO indicated high ecological risk for soil functions mediated by microorganisms(concerning to C and 2 nutrient cycling) due to deposition of tailing contaminated with 17 years after the smelter activities had stopped. Besides direct effect of metal toxicity on microbial biomass and activity, there are indirect effects related to changes in vegetation cover, soil organic carbon, pH, and nutrient availability, and consequently changes in the soil microclimate and physical?chemical properties that may lead to losses of habitat function for soil microorganisms and the they play. However, a multivariate decomposition of variance indicated that vegetation cover explained only3.1%, whereas metals explained 26.9% of the variation associated to the microbial/biochemical indicators,showing a stronger effect of metals. MenosAbstract Microbial and biochemical indicators of soil health were use do assess the ecological and biological activity of soils contaminated with metals at a lead smelter plant and surrounding area in northeast Brazil. Soil respiration, microbial biomass of C and N, acid phosphatase, asparaginase, and density of ammonifying and ammonium-oxidizing microorganisms were positively correlated with soil Organic carbon and/or water content, but showed negative correlations with metal soil.Nitri?cation rate and metabolic quotient (qCO) were positively correlated with metal contamination,suggesting favorable conditions for N loss and 2 microbial stress, respectively. No conditions contents signi?cant correlations were found between metal concentrations in soil and dehydrogenase activity or ammoni?cation rate,considering water content and soil organic carbon as covariables. Soil respiration, microbial biomasses of C and N, dehydrogenase, acid phosphatase, asparaginase activities, and ammonifying microorganisms were positively correlated with percentage vegetation cover, while nitri?cation and ammoni?cation rates were negatively correlated with this parameter. In general, soil respiration, microbial biomass of C and N, acid phosphatase, asparaginase, density of ammonifying and ammonium oxidizing microorganisms,nitri?cation rate and qCO indicated high ecological risk for soil functions mediated by microorganisms(concerning to C and 2 nutrient cycling) due to deposition of tailing contam... Mostrar Tudo |
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Thesagro: |
Metal. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 02752naa a2200193 a 4500
001 1940875
005 2017-07-25
008 2012 bl uuuu u00u1 u #d
100 1 $aNIEMEYER, J. C.
245 $aMicrobial indicators of soil health as tools for ecological risk assessment of a metal contaminated site in Brazil.$h[electronic resource]
260 $c2012
520 $aAbstract Microbial and biochemical indicators of soil health were use do assess the ecological and biological activity of soils contaminated with metals at a lead smelter plant and surrounding area in northeast Brazil. Soil respiration, microbial biomass of C and N, acid phosphatase, asparaginase, and density of ammonifying and ammonium-oxidizing microorganisms were positively correlated with soil Organic carbon and/or water content, but showed negative correlations with metal soil.Nitri?cation rate and metabolic quotient (qCO) were positively correlated with metal contamination,suggesting favorable conditions for N loss and 2 microbial stress, respectively. No conditions contents signi?cant correlations were found between metal concentrations in soil and dehydrogenase activity or ammoni?cation rate,considering water content and soil organic carbon as covariables. Soil respiration, microbial biomasses of C and N, dehydrogenase, acid phosphatase, asparaginase activities, and ammonifying microorganisms were positively correlated with percentage vegetation cover, while nitri?cation and ammoni?cation rates were negatively correlated with this parameter. In general, soil respiration, microbial biomass of C and N, acid phosphatase, asparaginase, density of ammonifying and ammonium oxidizing microorganisms,nitri?cation rate and qCO indicated high ecological risk for soil functions mediated by microorganisms(concerning to C and 2 nutrient cycling) due to deposition of tailing contaminated with 17 years after the smelter activities had stopped. Besides direct effect of metal toxicity on microbial biomass and activity, there are indirect effects related to changes in vegetation cover, soil organic carbon, pH, and nutrient availability, and consequently changes in the soil microclimate and physical?chemical properties that may lead to losses of habitat function for soil microorganisms and the they play. However, a multivariate decomposition of variance indicated that vegetation cover explained only3.1%, whereas metals explained 26.9% of the variation associated to the microbial/biochemical indicators,showing a stronger effect of metals.
650 $aMetal
700 1 $aLOLATA, G. B.
700 1 $aCARVALHO, G. M. de
700 1 $aSILVA, E. M. da
700 1 $aSOUSA, J. P.
700 1 $aNOGUEIRA, M. A.
773 $tApplied Soil Ecology$gv. 59, p. 96-105, 2012.
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