976 resultados para 1997
Resumo:
There is increasing adoption of computer-based tools to support the product development process. Tolls include computer-aided design, computer-aided manufacture, systems engineering and product data management systems. The fact that companies choose to invest in tools might be regarded as evidence that tools, in aggregate, are perceived to possess business value through their application to engineering activities. Yet the ways in which value accrues from tool technology are poorly understood.
This report records the proceedings of an international workshop during which some novel approaches to improving our understanding of this problem of tool valuation were presented and debated. The value of methods and processes were also discussed. The workshop brought together British, Dutch, German and Italian researchers. The presenters included speakers from industry and academia (the University of Cambridge, the University of Magdeburg and the Politechnico de Torino)
The work presented showed great variety. Research methods include case studies, questionnaires, statistical analysis, semi-structured interviews, deduction, inductive reasoning, the recording of anecdotes and analogies. The presentations drew on financial investment theory, the industrial experience of workshop participants, discussions with students developing tools, modern economic theories and speculation on the effects of company capabilities.
Resumo:
Charles Darwin the research ship undertook an Oceanographic Cruise in 1986, CD 86/17 of the North Arabian Sea. Sediment cores were collected between 15° and 25°N. In this study sediment cores collected from deep Indus and Oman basins (CD 1715, CD 1730, CD 1738) have been analyzed for mineralogy, water content and porosity. In general, the cores are mainly composed of clay to silt sized terrigenous and biogenic constituents. Quartz, chlorite and illite are the common minerals of Arabian Sea sediments. Porosity determined by water content of sediments has been correlated with quartz/chlorite and quartz/illite peak ratios to show a relationship between mineral composition and physical properties.
Resumo:
The freshwater testate amoeba Difflugia tuberspinifera Hu et al. 1997 collected from pond and lake in China, is investigated by light and scanning electron microscopy. This little known taxon is redescribed and its morphology, biometry and ecology are supplied. After carefully comparison with other six similar species including Difflugia bartosi Stepanek, D. corona Wallich, D. corona cashi Deflandre, D. corona tuberculata Vucetich, D. muriformis Gauthier-Lievre et Thomas and Netzelia tuberculata (Wallich) Netzal we believe that the sub-spherical to spherical shell, the mulberry-shaped appearance, the 7-10 apertural tooth-like structures, the short collar and the conical spines numbering from 4 to 8 at the upper equatorial region in D. tuberspinifera set it apart from other species. Besides, statistical analysis indicates that D. tuberspinifera is a size-monomorphic species characterized by a main-size class and a small size range and the shell height is significant correlated with other morphometric characters at p < 0.05 excepting the number of aperture tooth-like structures and the number of spines. Moreover, D. tuberspinifera inhabits not only lotic but also lentic environment.
Resumo:
A search of the literature on rotifers recorded from China, includes today 477 valid species names and 42 subspecies or infrasubspecific variants in 84 genera and 28 families recorded since 1893. Chinese rotifera research is reviewed, and all recorded species are listed with current taxonomic status and their first localities in China. Most of the named taxa are widely distributed or cosmopolitan, with only a small number (about 3%) possibly restricted to China. This fauna exhibits 15 endemic taxa. The composition and distribution of Chinese Rotifera are briefly analyzed. It is likely that considerably more rotifers remain to be described from China as further study to be carried on and taxonomic resolution improves.
Resumo:
Este documento resume os resultados da pesquisa realizada pela Embrapa Monitoramento por Satélite visando atender o Ministério da Agricultura e do Abastecimento, para identificação de áreas críticas no país quanto ao uso do fogo.
Resumo:
Situação mundial da soja; Produção; Exportações / Importações; Esmagamento; Estoques finais; Farelo de soja; Óleo de soja; Balanço de oferta e demanda mundial de soja no período de 1993/94 e 1996/97; Exigências climáticas; Exigências hídricas; Exigências térmicas e fotoperiódicas; Rotação de culturas; Seleção de especies para rotação de culturas; Planejamento da propriedade; Rotação de culturas com soja no sul do Maranhão; Manejo do solo; Manejo de resíduos culturais; Preparo do solo; Alternância do uso de implementos no preparo do solo; Rompimento da camada compactada; Sistema de semeadura direta; Correção e manutenção da fertilidade do solo; Acidez do solo; Calagem; Qualidade do calcário e condições de uso; Correção da acidez subsuperficial; Exigências minerais e adubação para a cultura da soja; Adubação; Cultivares; Cuidados na aquisição e na utilização de semente; Qualidade da semente; Armazenamento das sementes; Tratamento e inoculação de sementes; Instalação da lavoura; Cuidados relativos ao manuseio das sementes; Época da semeadura; Semeadura na entressafra; População de plantas e espaçamento; Calculo da quantidade de sementes; Controle de plantas daninhas; Informações importantes; Semeadura direta; Disseminação; Resistência; Manejo de pragas; Doenças e medidas de controle; Considerações gerais; Doenças identificadas no Brasil; Principais doenças e medidas de controle; Retenção foliar ("Haster Verde"); Colheita; Fatores que afetam a eficiência da colheita; Avaliação de perdas; Como evitar perdas; Tecnologia de sementes; Seleção do local; Avaliação da qualidade; Remoção de torrões para prevenir a disseminação do nematoide de cisto e do percevejo castanho.
Resumo:
Situacao mundial da soja; Exigencias climaticas; Rotacao de culturas; Manejo do solo; Correcao e manutencao da fertilidade do solo; Cultivares; Cuidados na aquisicao e na utilizacao de semente; Tratamento e inoculacao de sementes; Instalacao da lavoura; Controle de plantas daninhas; Manejo de pragas; Doencas e medidas de controle; Retenco foliar(Haste verde); Colheita; Tecnologia de sementes.
Resumo:
Características gerais da rede oficial de avaliação de genótipos de girassol; Resultados dos ensaios finais e intermediários; Indicação de genótipos.
Resumo:
1999