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314452 documents, page 1 of 31446

Exponential dichotomies for linear dynamic equations on measure chains. – In: Nonlinear analysis

Pötzsche, Christian (2001)
Exponential dichotomies for linear dynamic equations on measure chains. – In: Nonlinear analysis / Theory and methods. 47. 2001. S. 873-884

Diagnóstico diferencial dos distúrbios motores esofagianos pelas características da disfagia Differential diagnosis of esophageal motor disorders based in characteristics of dysphagia

Gerson R. DOMINGUES; Eponina M. O. LEMME (2001)
Racional -- A disfagia é um dos principais sintomas das doenças do esôfago e sua caracterização é importante para formulação de hipóteses diagnósticas e condução da propedêutica. A anamnese freqüentemente permite diferenciar as disfagias orgânicas das funcionais, porém a literatura carece de dados caracterizando este sintoma entre os diferentes distúrbios motores do esôfago. Objetivo - Avaliar se é possível a distinção entre os diferentes distúrbios motores diagnosticados pela esofagomanometr...

Clean and efficient energies for Europe : socio-economic impact of energy research

Chrysochoides, Nicolas; Casey, Thomas; Cabo, Pépin; Almeida, Manuela Guedes de; Andrada, Luis; Cutler, Annette; Drda-Kühn, Karin; Olliver, John; Salve, Margarita; Starzer, Otto (2001)
Report of the independent expert panel Launched in 1994, the Fourth Framework Programme (FP4) covering research and demonstration aimed to improve the security of energy supply and to reduce the impact of the production and use of energy on the environment, in particular CO2 and the other greenhouse gases. Other important EU objectives were also addressed including strengthening the technological basis of the energy industry (e.g. employment and export potential), improving Eur...

Influence of chemical composition and volume fraction of phases on the dezincification resistance of brasses

Vilarinho, Cândida; Castro, F.; Soares, Delfim (2001)
Although brasses are resistant to several forms of corrosion, they are susceptible to dezincification – selective dissolution of zinc – which may be responsible for failures in service of casting brass products. The effect of the chemical composition on dezincification resistance of brasses has been investigated. This study includes both commercial alloys and alloys prepared in laboratory in order to evaluate the specific effect of alloying elements such as lead, silicon, aluminium, ...

Viabilidade de pólen in vivo e in vitro em genótipos de açaizeiro

Oliveira,Maria do Socorro Padilha de; Maués,Márcia Motta; Kalume,Maura Anjos de Andrade (2001)
Determinou-se a viabilidade de pólen in vivo e in vitro em 20 genótipos de açaizeiro, da coleção de germoplasma da Embrapa Amazônia Oriental. Os grãos de pólen in vivo foram retirados de botão floral (BF) e de flor recém-aberta (FA) e os in vitro de ampolas armazenadas em freezer (-10ºC), com período de armazenamento (PA) de um (PA1), três (PA3), seis (PA6) e doze (PA12) meses. Utilizou-se a solução de Baker, sendo foi retirada uma amostra para cada estádio. Calculou-se a taxa de viabilidade ...

FUSSIM2: brief description of the simulation model and application to fertigation scenarios

Heinen , Marius (2001)
International audience; Standard theories for water movement, solute transport and uptake by roots can be applied to closed, recirculating cropping systems, even when coarse substrates are used. Some of these systems, such as bedding systems or potting plants, are vulnerable to accumulation of solutes in the root zone, which may be harmful to crop development. A two-dimensional simulation model for the above-mentioned processes is briefly described. This model can be used, amongst other possi...

Learning About Migration Decisions from the Migrants: Using Complementary Datasets to Model Intra-Regional Migrations in Spain

Arellano, Manuel; Bover, Olympia (2001)
We investigate the determinants of the remarkable increase in intra-regional migrations since the 1980's in Spain, using a large administrative micro dataset on migrants. Conditional migration probabilities are identified by comparing the migrants' joint distribution of characteristics to the corresponding distribution from the Spanish Labour Force Survey. The proportion of employment in the service industry, unemployment, house prices and education, all have an important positive effect on t...

Simulation de l'influence de la propulsion plasmique sur la charge électrostatique d'un satellite en milieu magnétosphorique

Chanrion , Olivier (2001)
Les satellites en vol, baignent dans un mélange de particules chargées (et éventuellement de particules neutres). Des électrons et des ions issus de ce plasma interagissent avec les surfaces du satellite et vont ainsi modifier sa charge électrostatique. Nous sommes intéressés particulièrement par ces phénomènes de charge en considérant des plasmas provenant de la magnétosphère et d'un propulseur électrique. Le but est de simuler l'influence de ce type de propulsion sur la charge électrostatiq...