Sabiia Seb
PortuguêsEspañolEnglish
Embrapa
        Busca avançada

Botão Atualizar


Botão Atualizar

Ordenar por: RelevânciaAutorTítuloAnoImprime registros no formato resumido
Registros recuperados: 9
Primeira ... 1 ... Última
Imagem não selecionada

Imprime registro no formato completo
A 3D model for simulating the spatial and temporal distribution of temperature within ellipsoidal fruit Inra
Saudreau, M.; Sinoquet, H.; Santin, O.; Marquier, A.; Adam, B.; Longuenesse, J.J.; Guilioni, L.; Chelle, M..
A physical model simulating the spatio-temporal distribution of temperature in an ellipsoidal fruit has been developed. It is based on the numerical resolution of the three-dimensional (3D) unsteady heat conduction equation with unsteady and non-homogeneous heat fluxes as boundary conditions. The numerical scheme and the physical models have been tested by comparing with an analytical solution for simple configurations. The model quality has been assessed by comparing model outputs to temperature measured with thermocouples at several locations in isolated peach and apple fruits. The root mean square error (RMSE) for temperature simulated at a 1 min time step was about 0.8 °C. A sensitivity analysis showed that accurate estimations of the surface...
Tipo: Journal Article Palavras-chave: THERMOCOUPLE MICROCLIMATE; MODELING; THREE DIMENSIONAL; DYNAMICS.
Ano: 2007 URL: http://www.prodinra.inra.fr/prodinra/pinra/doc.xsp?id=PROD200873da589b&uri=/notices/prodinra1/2010/07/
Imagem não selecionada

Imprime registro no formato completo
A co-viability model of grazing and bird community management in farmland Inra
Tichit, M.; Doyen, L.; Lemel, J.Y.; Renault, O.; Durant, D..
In European grasslands, livestock grazing is a key driver of habitat quality. However, the specific grazing regimes that favour habitat quality and ensure biodiversity conservation remain largely unknown. This paper develops a dynamic model to predict how livestock grazing may be used to sustain a bird community without penalizing cattle feeding. The model focuses on a grassland grazed by cattle which is also the breeding habitat of three wader species. It integrates the dynamics of a sward, controlled through grazing, and that of three bird populations. Viability theory and dynamic programming are used to reveal viable grazing strategies that ensure the creation of two levels of habitat quality (homogeneous and heterogeneous) whilst ensuring cattle...
Tipo: Journal Article Palavras-chave: GRAZING; BIODIVERSITY; HABITAT QUALITY; DYNAMICS; VIABLE CONTROL.
Ano: 2007 URL: http://www.prodinra.inra.fr/prodinra/pinra/doc.xsp?id=PROD2008e337af77&uri=/notices/prodinra1/2010/09/
Imagem não selecionada

Imprime registro no formato completo
A model of stimulus-specific neural assemblies in the insect antennal lobe Inra
Martinez, D.; Montejo, N..
A fundamental question in computational neuroscience is to understand how interactions between neurons underlie sensory coding and information storage. In the first relay of the insect olfactory system, odorant stimuli trigger synchronized activities in neuron populations. Synchronized assemblies may arise as a consequence of inhibitory coupling, because they are disrupted when inhibition is pharmacologically blocked. Using computational modelling, we studied the role of inhibitory, noisy interactions in producing stimulus-specific synchrony. So far, experimental data and modelling studies indicate that fast inhibition induces neural synchrony, but it remains unclear how desynchronization occurs. From theoretical analysis and computer simulations, we found...
Tipo: Journal Article Palavras-chave: DROSOPHILE; NEURONE; OLFACTION; INSECTE; MODELE; LOBE ANTENNAIRE; ODEUR; STIMULUS; ANALYSE STATISTIQUE OLFACTORY-BULB; INHIBITORY NEURONS; OSCILLATORY SYNCHRONIZATION; ODOR REPRESENTATION; OUTPUT NEURONS; NETWORK MODEL; DROSOPHILA; DYNAMICS; DISCRIMINATION; INFORMATION.
Ano: 2008 URL: http://www.prodinra.inra.fr/prodinra/pinra/doc.xsp?id=PROD201028bfe973&uri=/notices/prodinra1/2010/10/
Imagem não selecionada

Imprime registro no formato completo
Does global warming threaten the dynamics of Arctic charr in Lake Geneva ? Inra
Gerdeaux, D..
Tipo: Journal Article Palavras-chave:  LAC LEMAN; OMBLE CHEVALIER; DYNAMIQUE DES POPULATIONS; RECHAUFFEMENT CLIMATIQUE  LAKE GENEVA; ARCTIC CHARR; GLOBAL WARMING; DYNAMICS; STOCKING.
Ano: 2011 URL: http://www.prodinra.inra.fr/prodinra/pinra/doc.xsp?id=PROD20107ef24e2f&uri=/notices/prodinra1/2011/04/
Imagem não selecionada

Imprime registro no formato completo
Dynamic modelling of agricultural policies: the role of expectation schemes Inra
Femenia, F.; Gohin, A..
The highly disputed effects of agricultural trade liberalisation are mostly simulated with static models. Our main objective in this paper is to evaluate the robustness of the static simulation results to the consistent modelling of dynamic behaviours and to the linked specification of price/return expectations. Focusing on a complete trade liberalisation scenario of arable crop markets by developed countries, we find that available static results are quite robust to dynamic specifications and to most expectation schemes. Endogenous market fluctuations due to expectation errors may appear following trade liberalisation. These fluctuations are nevertheless limited by the many feedback effects revealed by our general equilibrium framework.
Tipo: Conference Paper Palavras-chave: AGRICULTURAL POLICY; DYNAMICS; ENDOGENOUS FLUCTUATIONS; EXPECTATION ERRORS.
Ano: 2008 URL: http://www.prodinra.inra.fr/prodinra/pinra/doc.xsp?id=PROD20102c043b7c&uri=/notices/prodinra1/2010/04/
Imagem não selecionada

Imprime registro no formato completo
Mediterranean sapropel formation, dynamic and climatic viewpoints ArchiMer
Bethoux, Jp.
Sapropels, i. e. discrete, black and organic-rich layers sedimented in the Eastern basin in anoxic conditions, constitute record, over the past 500,000 years, of eleven particular interactions between marine circulation and biology during glacial as well as temperate climates. Considering climatic and dynamic aspects, we argue that this formation is preconditioned by the stoppage of dense water formation in the Adriatic Sea, following sea-level and/or freshwater input changes. In this case, oxygenation of eastern deep water depends solely on the dense water formation in the South Aegean Sea, a process modified by episodic freshwater inputs. This scheme explains correlations between sapropel events and the strong African monsoons responsible for Nile river...
Tipo: Text Palavras-chave: MEDITERRANEAN SAPROPELS; DYNAMICS; CLIMATE; PRODUCTIVITY.
Ano: 1993 URL: http://archimer.ifremer.fr/doc/00099/21042/18668.pdf
Imagem não selecionada

Imprime registro no formato completo
Social and semantic coevolution in knowledge networks Inra
Roth, C.; Cointet, J.P..
Socio-semantic networks involve agents creating and processing information: communities of scientists, software developers, wild Contributors and webloggers are, among others, examples Of Such knowledge networks. We aim at demonstrating that the dynamics of these communi ties can be adequately described as the coevolution of a social and a socio-semantic network. More precisely, we will first introduce a theoretical framework based on a social network and a socio-semantic network, i.e. an epistemic network featuring agents. concepts and links between agents and between agents and concepts. Adopting a relevant empirical protocol. we will then describe the joint dynamics of social and socio-semantic structures, at both macroscopic and microscopic scales,...
Tipo: Journal Article Palavras-chave: SCIENTIFIC COLLABORATION STATISTICAL EVALUATION; EPISTEMIC COMMUNITIES; GALOIS LATTICES; MODELS; DISTRIBUTIONS; BLOCKMODELS; EVOLUTION; DYNAMICS; KNOWLEDGE NETWORKS; SOCIO-SEMANTIC NETWORKS; HIERARCHIES; DYNAMICS; COHESIVENESS; EPISTEMIC COMMUNITIES; BICLIQUES; ; BLOGS; SCIENTIFIC NETWORKS.
Ano: 2010 URL: http://www.prodinra.inra.fr/prodinra/pinra/doc.xsp?id=PROD20117c62aa39&uri=/notices/prodinra1/2011/07/
Imagem não selecionada

Imprime registro no formato completo
The PDO Pélardon, the federator of new individual and collective dynamics Inra
Napoléone, M.; Boutonnet, J.P..
Tipo: Conference Paper Palavras-chave: AOC PELARDON CONTROLLED DESIGNATION OF ORIGIN; PRODUCTION SYSTEMS; CHEESE PRODUCTION AND PROCESSING; DYNAMICS.
Ano: 2006 URL: http://www.prodinra.inra.fr/prodinra/pinra/doc.xsp?id=PROD2008b2b45ecc&uri=/notices/prodinra1/2011/01/
Imagem não selecionada

Imprime registro no formato completo
Tree girdling increases soil N mineralisation in two spruce stands Inra
Zeller, B.; Liu, J.; Buchmann, N.; Richter, A..
Tree girdling is a common practice in forestry whenever trees are to be killed without felling. The effect of tree girdling on soil nitrogen (N) mineralisation was estimated in both an old and a young spruce forest. The dynamics of mineral N (NO3-–N and NH4 +–N) and soil microbial biomass carbon (MBC) and N (MBN) were determined for different seasons. The in situ net N mineralisation was measured by incubating soil samples in stainless steel cylinders and the gross N mineralisation rates were measured by 15N pool dilution method. Mineral N concentrations increased significantly in the girdled plots in both old and young spruce forests and showed variations between soil horizons and between sampling times. Tree girdling significantly increased net N...
Tipo: Journal Article Palavras-chave: BIOGEOCHIMIE; FLUX ET STOCKS ELEMENTS; MATIERE ORGANIQUE DU SOL; OBSERVATION ET ANALYSE DES PROCESSUS; VARIABILITE SPATIALE ET TEMPORELLE GROSS NITROGEN TRANSFORMATIONS; HOOP PINE PLANTATION; ACID FOREST SOILS; MICROBIAL BIOMASS; SUBTROPICAL AUSTRALIA; NITRIFICATION; CARBON; RESPIRATION; DYNAMICS; ROOTS; AMMONIUM; MICROBIAL BIOMASS; NITRATE; N MINERALISATION; SPRUCE FOREST; TREE GIRDLING .
Ano: 2008 URL: http://www.prodinra.inra.fr/prodinra/pinra/doc.xsp?id=PROD201077d71a1&uri=/notices/prodinra1/2011/01/
Registros recuperados: 9
Primeira ... 1 ... Última
 

Empresa Brasileira de Pesquisa Agropecuária - Embrapa
Todos os direitos reservados, conforme Lei n° 9.610
Política de Privacidade
Área restrita

Embrapa
Parque Estação Biológica - PqEB s/n°
Brasília, DF - Brasil - CEP 70770-901
Fone: (61) 3448-4433 - Fax: (61) 3448-4890 / 3448-4891 SAC: https://www.embrapa.br/fale-conosco

Valid HTML 4.01 Transitional