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| Registros recuperados: 18.125 | |
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| Petrolia, Daniel R.; Kim, Tae-Goun; Moore, Ross G.; Caffey, Rex H.. |
| It was the objective of this study to take a first cut at understanding the cost structure of coastal restoration technologies and to obtain some preliminary measures of cost-effectiveness of these technologies. This analysis focused on restoration projects funded by the Coastal Wetlands Planning, Protection, and Restoration Act (CWPPRA, also known as the Breaux Act), the primary funding source for restoration projects in Louisiana. Projects chosen were those that included a component of dredging sediment with the explicit objective of increasing acreage in the project area, i.e., of building land. |
| Tipo: Conference Paper or Presentation |
Palavras-chave: Restoration; Dredging; Land Economics/Use. |
| Ano: 2009 |
URL: http://purl.umn.edu/46844 |
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| Hennessy, David A.. |
| The modeling of price risk in the theory and practice of commodity risk management has been developed far beyond that of crop yield risk. This is in large part due to the use of plausible stochastic price processes. We use the Pólya urn to identify and develop a model of the crop yield expectation stochastic process over a growing season. The process allows a role for agronomic events, such as growing degree days. The model is internally consistent in adhering to the martingale property. The limiting distribution is the beta, commonly used in yield modeling. By applying binomial tree analysis, we show how to use the framework to study hedging decisions and crop valuation. |
| Tipo: Working or Discussion Paper |
Palavras-chave: Crop insurance; Growing degree days; Martingale; Pólya urn; Stochastic process.; Risk and Uncertainty. |
| Ano: 2009 |
URL: http://purl.umn.edu/54829 |
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| FLORI, J. E.; CASTRO, J. M. da C. e.. |
| A cultura da goiabeira no Nordeste é explorada principalmente por pequenos agricultores. O amplo uso popular e a redução de oferta desta fruta por vários fatores, principalmente de ordem fitossanitária, vêm contribuindo para a boa rentabilidade da cultura. Outra vantagem desta cultura é o custo de produção equivalente a outras culturas, como bananeira e coqueiro, e valor da produção bem superior às mesmas. Esta relação de custo/benefício é favorável à cultura da goiabeira. Outra vantagem da cultura é a facilidade de programar sua colheita em função de expectativa de melhores preços. O Vale do São Francisco vem-se destacando cada vez mais no cenário internacional como um polo produtor e exportador de frutas frescas, com ênfase para manga e uva. |
| Tipo: Capítulo em livro técnico (INFOTECA-E) |
Palavras-chave: Cultivo; Vale do São Francisco; Goiaba; Comercialização; Irrigação. |
| Ano: 2009 |
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/573153 |
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| FARIA, A. R. N.; NORONHA, A. C. da S.; OLIVEIRA, A. A. R.; OLIVEIRA, A. M. G.; CARDOSO, C. E. L.; RITZINGER, C. H. S. P.; OLIVEIRA, E. J. de; COELHO, E. F.; SANTOS FILHO, H. P.; CRUZ, J. L.; OLIVEIRA, J. R. P.; DANTAS, J. L. L.; SOUZA, L. D.; OLIVEIRA, M. de A.; COELHO FILHO, M. A.; SANCHES, N. F.; MEISSNER FILHO, P. E.; MEDINA, V. M.; CORDEIRO, Z. J. M.. |
| bitstream/item/128280/1/PLANTAR-Mamuo-ed03-2009.pdf |
| Tipo: Col Criar Plantar ABC 500P/500R Saber (INFOTECA-E) |
Palavras-chave: Comercialização; Doença de planta; Irrigação; Praga de planta; Variedade. |
| Ano: 2009 |
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/256911 |
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| Duarte, Mônica Anselmi; Anjos, Flávio Sacco dos. |
| Este artigo se dedica a abordar a inclusão das ações concretas e/ou materiais como elemento discursivo, juntamente com a fala e a escrita, apartir dos fundamentos teóricos de análise do discurso em Michel Foucault, para permitir a compreensão do discurso da burguesia agrária gaúcha, mais especificamente do grande produtor de arroz, relativamente ao meio ambiente e ao uso dos recursos hídricos. O enunciado, o acontecimento, o dizível, o visível, práticas discursivas e não-discursivas, as formas de expressão e de conteúdo e materialidade são conceitos que permitem que a ação prática, a intervenção e a apropriação dos bens da natureza, em especial a água, sejam consideradas como manifestações da visão de mundo de um ator importante na implementação do novo... |
| Tipo: Info:eu-repo/semantics/article |
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| Ano: 2009 |
URL: http://periodicos.ufsm.br/extensaorural/article/view/5554 |
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| Priyanka Singh; Farhan Mohammad; Abhay Sharma. |
| Rodent kindling induced by pentylenetetrazole (PTZ) is an established model of epileptogenesis and antiepileptic drug (AED) testing. Recently, a Drosophila systems model has been described in which chronic PTZ causes a decreased climbing speed in adult males on 7th day. Some AEDs ameliorate development of this locomotor deficit. Time-series of microarray expression profiles of heads of flies treated with PTZ has been found to resemble transcriptomic alterations associated with epileptogenesis. In the fly model, withdrawal from seven day long PTZ treatment causes an increased climbing speed on 7th consequent day. Here, we present a systems model of the post-PTZ withdrawal regime. Unlike AED-untreated individuals, flies treated with any of the five AEDs... |
| Tipo: Manuscript |
Palavras-chave: Genetics & Genomics; Neuroscience; Pharmacology; Bioinformatics. |
| Ano: 2009 |
URL: http://precedings.nature.com/documents/3447/version/1 |
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| Sarrazin, Jozee; Rodier, Philippe; Tivey, M. K.; Singh, H.; Schultz, A.; Sarradin, Pierre-marie. |
| Numerous attempts have been made over the last thirty years to estimate fluid flow rates at hydrothermal vents, either at the exit of black smoker chimneys or within diffuse flow areas. In this study, we combine two methods to accurately estimate fluid flow velocities at diffuse flow areas. While the first method uses a hot film anemometer that performs high-frequency measurements, the second allows a relatively rapid assessment of fluid flow velocity through video imagery and provides in situ data to calibrate the sensor. Measurements of flow velocities on hydrothermal diffuse flow areas were obtained on the Mid-Atlantic Ridge (MAR). They range from 1.1 to 4.9 mm/s at the substratum level, in low-temperature (4.5-16.4 degrees C) diffuse flow areas from... |
| Tipo: Text |
Palavras-chave: Diffuse flow; Video imagery; Hot film anemometer; Hydrothermal vent; Fluid flow velocity. |
| Ano: 2009 |
URL: http://archimer.ifremer.fr/doc/2009/publication-7299.pdf |
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| Bodiguel, Xavier; Maury, Olivier; Mellon-duval, Capucine; Roupsard, Francois; Le Guellec, Anne-marie; Loizeau, Veronique. |
| Bioaccumulation is difficult to document because responses differ among chemical compounds, with environmental conditions, and physiological processes characteristic of each species. We use a mechanistic model, based on the Dynamic Energy Budget (DEB) theory, to take into account this complexity and study factors impacting accumulation of organic pollutants in fish through ontogeny. The bioaccumulation model proposed is a comprehensive approach that relates evolution of hake PCB contamination to physiological information about the fish, such as diet, metabolism, reserve and reproduction status. The species studied is the European hake (Merluccius merluccius, L. 1758). The model is applied to study the total concentration and the lipid normalised... |
| Tipo: Text |
Palavras-chave: Dynamic Energy Budget (DEB) Bioaccumulation model; Bioenergetic Polychlorinated biphenyls (PCB) Demersal fish Merluccius merluccius. |
| Ano: 2009 |
URL: http://archimer.ifremer.fr/doc/2009/publication-6789.pdf |
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| Stefanou, Spiro E.. |
| The definition and measurement of dynamic economic performance has been addressed obliquely in the literature with the notions of scope economies and capacity utilization measures, but little work has focused on develop the static theory analogs of efficiency measures into the dynamic context. This paper is an attempt to identify some of the conceptual and methodological issues to be addressed. A model allowing for dynamic production decisions in the face of inefficiency is presented to illustrate some of the issues and the extensions necessary to identify truly dynamic performance measures. |
| Tipo: Journal Article |
Palavras-chave: Agricultural and Food Policy; Production Economics. |
| Ano: 2009 |
URL: http://purl.umn.edu/58278 |
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| Registros recuperados: 18.125 | |
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