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| Registros recuperados: 127 | |
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| Stott, Alistair W.; Milne, Catherine E.; Gunn, George J.. |
| An epidemiological model is described that closely mimicked results of a published serological study of natural transmission of Maedi-Visna virus in a low ground flock of sheep. We adjusted parameters in the model from this baseline to explore the possible implications for the control of Maedi-Visna virus in typical British flocks. On closed hill farms, low probability of effective contact was most critical for control. In open low ground flocks, purchasing accredited replacements eliminated disease spread, otherwise flock size was the most important factor governing flock prevalence. Results highlighted the need for more epidemiological information about Maedi-Visna, particularly whether hill farms act as a hidden reservoir of virus or reduce the impact... |
| Tipo: Working or Discussion Paper |
Palavras-chave: Livestock Production/Industries; Maedi-Visna; Model; Markov Chain; Sheep; Control. |
| Ano: 2009 |
URL: http://purl.umn.edu/61102 |
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| Delgado,Ricardo Tellez; Flores,José Saturnino Mora. |
| ABSTRACTThe objective of this study was to know the factors that determine the consumption of beef in the Metropolitan Area of the Valley of Mexico, using logit and probit modeling (nominal variable) with 400 surveys. The results showed that significant variables that determine the probability of purchasing beef are schooling, number of members per family, meat preference, family income, and presence of disease in the individual. The largest marginal effects on the purchase decision were provided by the income and the meat preference variables, while the price was not significant. The main factors that determine the consumption of beef are schooling and the number of members in the family, while the meat preference and income are dismissed. |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Consumer; Logit; Meat; Model; Probit. |
| Ano: 2015 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982015001000371 |
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| Robin, Jean; Regost, Christelle; Arzel, Jacqueline; Kaushik, Sadasivam. |
| The fatty acid (FA) content of fish is generally said to reflect fatty acid composition of the diet. In fact, incorporation of FA into tissues is modulated by various metabolic factors, and final composition will depend upon the initial FA content, cumulative intake of dietary fatty acids, growth rate and duration. Analysis of time course of changes in FA composition should be easier with animals having different initial FA profiles, which are subsequently fed a diet with the same FA composition. Data from two studies, one with brown trout and another with turbot were used. Fish were first fed with diets containing one of three different oils (soybean oil (SO), linseed oil (LO) and fish oil (FO)), and subsequently fed the same fish oil-based diet... |
| Tipo: Text |
Palavras-chave: Dietary change; Model; Fish; Fatty acids. |
| Ano: 2003 |
URL: http://archimer.ifremer.fr/doc/2003/publication-498.pdf |
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| Millet, B. |
| The wind-driven flow in the closed bassin de Thau is reproduced with a two-dimensional numerical model of horizontal ciruclation using an Alternate Direction Implicit scheme. A stochastic analysis of frequencies on a yearly time scale of the velocity fields computed in the model and a spatial and stochastic treatment of the term (H2 y2), similar to an effective coefficient of horizontal dispersion by shear effect are presented. This approach will allow the delineation, in a stochastic manner, of the main structures of the circulation in the lagoon and the spatial heterogeneity of its ecohydrodynamic features. Two attempts of analogical research are presented, with sorne examples of the spatial structure in the phytoplankton biomass and the map of the... |
| Tipo: Text |
Palavras-chave: Lagune; Modèle; Circulation; Dispersion; Sédiment; Lagoon; Model; Circulation; Dispersion; Sediment. |
| Ano: 1989 |
URL: http://archimer.ifremer.fr/doc/00323/43399/43093.pdf |
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| Holzapfel,Eduardo A.; Leiva,Carlos; Mariño,Miguel A.; Paredes,Jerónimo; Arumí,José L.; Billib,Max. |
| This study analyzes the relationship between the variables of furrow irrigation and the irrigation performance parameters, crop yield, and deep percolation as a basis for furrow irrigation design and management. Application efficiency (AE), requirement efficiency (RE), requirement distribution efficiency (RDE), total distribution efficiency (TDE), and furrow irrigation management, operation, and design variables (inflow discharge, furrow length, and irrigation cutoff time) were correlated. The relationship between performance irrigation parameters and relative yield was also examined. In addition, environmental aspects related to leaching and runoff were also presented for each of the parameters. Study results indicate that increasing the length of the... |
| Tipo: Journal article |
Palavras-chave: Furrow; Irrigation; Performance parameters; Model; Yield; Leaching. |
| Ano: 2010 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-58392010000200012 |
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| Mayet, C.; Testut, L.; Legresy, B.; Lescarmontier, L.; Lyard, F.. |
| In February 2010, the Mertz Glacier Tongue (MGT) calved, releasing an 80 x 40 km iceberg. We have developed a high-resolution barotropic ocean model of the region to simulate the local circulation in response to tides and atmospheric forcing. We improved the coastline, grounding line position and built a new bathymetry using satellite imagery and older bathymetry data to derive the best available tidal model for the region. We compared this and other available models to seven different sea level observations available in the area and significantly improved the tidal solutions reaching a root sum square of 2.3 cm. This model was then run in different bathymetric configurations, considering the ice draft of the major icebergs B9B and C28, to simulate the... |
| Tipo: Text |
Palavras-chave: Mertz Glacier; Icebergs; Calving; Barotropic; Model. |
| Ano: 2013 |
URL: https://archimer.ifremer.fr/doc/00244/35568/34097.pdf |
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| Pieniak, Zuzanna; Verbeke, Wim; Scholderer, Joachim; Brunso, Karen; Olsen, Svein Ottar. |
| This paper focuses on exploring whether and to what extent affective health-related and cognitive determinants have an impact on fish consumption behaviour. Cross-sectional data were collected through the SEAFOODplus pan-European consumer survey (n=4,786) with samples representative for age and region in Belgium, the Netherlands, Denmark, Spain and Poland. Consumers’ belief that eating fish is healthy and their interest in healthy eating positively influence fish consumption behaviour. Subjective knowledge is found to be a more important predictor of fish consumption than objective knowledge. Age and education contribute significantly to explaining fish consumption behaviour. However, the age and education effects on fish consumption frequency are indirect... |
| Tipo: Conference Paper or Presentation |
Palavras-chave: Consumer; Fish; Determinants; Model; Food Consumption/Nutrition/Food Safety. |
| Ano: 2008 |
URL: http://purl.umn.edu/44326 |
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| Huettel, Silke; Kleinhanss, Werner; Offermann, Frank. |
| This paper analyses the impacts of the 2003 CAP reform and of milk quota trade at the national level. To this end, a mathematical programming model has been further developed for Germany and extended to other main milk-producing EU member states like France. Homogeneous farm groups are built on the basis of EU Farm Accountancy Data Network. The results show that quotas will be fully used in both countries if quota trade is possible. A clear tendency in the reallocation of production from small towards large farms can be seen in all regions for France. In Germany, the redistribution of direct payments induced by the implementation of the regional scheme of decoupled payments leads to higher reductions of income in dairy & beef farms than in France. |
| Tipo: Conference Paper or Presentation |
Palavras-chave: 2003 CAP reform; Milk quota trade; Model; Mathematical programming; International Relations/Trade. |
| Ano: 2005 |
URL: http://purl.umn.edu/24731 |
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| Boutin, Guillaume. |
| Sea ice, which covers most of the ocean near the poles, is a key component of the climate system. Global warming is driving its massive melting, especially in the Arctic. Where sea ice cover decreases, fetch increases leading to more energetic sea states. This means potentially enhanced wavesice interactions effects in the future. The quick evolution of sea ice extent and volume combined with the intensification of human activities in polar regions urge us to improve our understanding of waves-ice interactions.Sea ice attenuates waves. They can however propagate through it and break it far into the ice cover. Attenuation depends on ice properties such as floe size, thickness, etc. Once broken, resulting floes are more likely to drift and melt. In addition,... |
| Tipo: Text |
Palavras-chave: Vagues; Banquise; Modélisation; Zone Marginale de Glace; Waves; Sea ice; Model; Marginal Ice Zone. |
| Ano: 2018 |
URL: https://archimer.ifremer.fr/doc/00498/60968/64376.pdf |
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| Registros recuperados: 127 | |
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