Sabiia Seb
PortuguêsEspañolEnglish
Embrapa
        Busca avançada

Botão Atualizar


Botão Atualizar

Ordenar por: RelevânciaAutorTítuloAnoImprime registros no formato resumido
Registros recuperados: 15.277
Primeira ... 2345678910 ... Última
Imagem não selecionada

Imprime registro no formato completo
A decision support model simulating the vitamin supply over the year on a farm Organic Eprints
Mogensen, Lisbeth; Kristensen, Troels; Jensen, Søren K..
The aim of this new project is to develop a prototype of a decision support model simulating the feed and vitamin supply during a year to different groups of animals (calves, heifers, dry cows, cows in early and late lactation) on a farm self-sufficient with feed. The model takes into account that the content of vitamin depends on choice of crops, utilization method, cutting date, conservation method and duration of storage together with traditional optimizing the feed-ing scheme.
Tipo: Conference paper, poster, etc. Palavras-chave: Dairy cattle.
Ano: 2006 URL: http://orgprints.org/7418/1/FOJO_kongress_2006_paper.pdf
Imagem não selecionada

Imprime registro no formato completo
A Design Framework for Sensor Integration in Robotic Applications InTech
Dimitrios I. Kosmopoulos.
In this chapter we have introduced a design framework for developing software for integrating sensors to robotic applications, provided that open controller architecture is available. The design is general enough and enables the integration of the popular sensors to any open controller using a wide variety of control schemes. By keeping some simple
Tipo: 1 Palavras-chave: Industrial Robotics: Programming; Simulation and Applications.
Ano: 2006 URL: http://www.intechopen.com/articles/show/title/a_design_framework_for_sensor_integration_in_robotic_applications
Imagem não selecionada

Imprime registro no formato completo
A Determination of the Trade Creation and Diversion Effects of Regional Trade Agreements in the Western Hemisphere AgEcon
Hilbun, Brian M.; Kennedy, P. Lynn; Dufour, Elizabeth Anne.
With the recent proliferation of Regional Trade Agreements (RTAs) the tendency world-wide has been seemingly toward trade liberalization. This thesis is primarily concerned with the impacts RTAs have had in the Western Hemisphere regarding agricultural trade flows. Utilizing the framework of the Gravity Model, agricultural trade flows for 24 Western Hemisphere Nations were examined. In the course of the study it was expected that if RTAs were to have an effect it would be a positive Trade Creation Effect and a negative Trade Diversion Effect with positive effects for GDP of importer/exporter and population size of importer/exporter and a negative effect for that of distance. Of the five agreements examined (NAFTA, AC, MERCO, LAIA, and CACM), NAFTA and...
Tipo: Conference Paper or Presentation Palavras-chave: International Relations/Trade.
Ano: 2006 URL: http://purl.umn.edu/21138
Imagem não selecionada

Imprime registro no formato completo
A dimensão educativa do desenvolvimento rural. Infoteca-e
CAMPOLIN, A.I..
2006
Tipo: Artigo de divulgação na mídia (INFOTECA-E)
Ano: 2006 URL: http://www.infoteca.cnptia.embrapa.br/handle/doc/812621
Imagem não selecionada

Imprime registro no formato completo
A dinâmica da água no solo numa área em revegetação na base de operações geológo Pedro de Moura - Coari - AM. Repositório Alice
TEIXEIRA, W. G.; MACEDO, R. S.; MARTINS, G. C.; RODRIGUES, M. do R. L..
bitstream/item/191959/1/DINAMICA-DA-AGUA-WENCESLAU-REV.pdf
Tipo: Artigo em anais de congresso (ALICE) Palavras-chave: Revegetação.
Ano: 2006 URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1105385
Imagem não selecionada

Imprime registro no formato completo
A dinâmica dos sistemas de produção praticados em uma unidade de conservação de uso direto na Amazônia - a reserva extrativista do Rio Cajari no Estado do Amapá. Repositório Alice
SOUSA, W. P. de.
Este trabalho aborda um tipo específico de extrativismo: o extrativismo da castanha-do-brasil realizado na Reserva Extrativista do Rio Cajari no Estado do Amapá (RESERX/CA). O trabalho é uma continuidade de pesquisas realizadas no ano de 2000, e tem como foco principal compreeender a dinâmica dos sistemas de produção praticados na RESEX/CA. Neste trabalho percebemos que as mudanças ocorridas nos sistemas de produção praticados na RESEX/CA de 2000 para 2005, evidenciam que além dos fatores de ordem econômica, a permanência das práticas agrícolas com o extrativismo da castanha se rege por fatores. A relação histórica do uso da floresta com o extrativismo e as agriculturas é bem mais complexa, não podendo ser avaliada apenas no prisma econômico. Os dados...
Tipo: Tese/dissertação (ALICE) Palavras-chave: Extrativismo; Castanha-do-brasil; Reserva extrativista; Sistema de produção.
Ano: 2006 URL: http://www.alice.cnptia.embrapa.br/handle/doc/349275
Imagem não selecionada

Imprime registro no formato completo
A disposição de lodo de esgoto em solo agrícola. Repositório Alice
BETTIOL, W.; CAMARGO, O. A. de..
2006
Tipo: Capítulo em livro científico (ALICE) Palavras-chave: Lodo de esgoto; Adubo de esgoto; Lodo residual.
Ano: 2006 URL: http://www.alice.cnptia.embrapa.br/handle/doc/14956
Imagem não selecionada

Imprime registro no formato completo
A distinctive new cloud-forest rodent (Hystricognathi: Echimyidae) from the Manu Biosphere Reserve, Peru Mastozool. neotrop.
Patterson,Bruce D.; Velazco,Paul M..
Recent surveys in Peru 's Manu National Park and Biosphere Reserve uncovered a new species of hystricognath rodent, a spiny rat (Echimyidae) with dense, soft fur. Inhabiting Andean cloud-forests at 1900 m, the new rodent belongs to a radiation of "brush-tailed tree rats" previously known only from the Amazon, Orinoco, and other lowland river drainages. Phylogenetic analysis of morphology (cranial and dental characters) unambiguously allies the new species with species of Isothrix. While the inclusion of the new taxon does not resolve the "star phylogeny" which underlies the echimyid radiation, it identifies the Andes as a possible theatre for the evolution of some soft-haired members of the group. The new species is described and a revised diagnosis of the...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Andes; Morphology; Phylogenetics; Species description; Systematics.
Ano: 2006 URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S0327-93832006000200002
Imagem não selecionada

Imprime registro no formato completo
A diversidade da agricultura familiar Buscador Latinoamericano
org. Sergio Schneider.
Tipo: Text Palavras-chave: AGRICULTURA; DIVERSIDAD.
Ano: 2006 URL: http://www.flacso.org.ec/biblio/shared/biblio_view.php?bibid=130618&tab=opac&oai:flacso.org.ec:130618
Imagem não selecionada

Imprime registro no formato completo
A diversidade vegetal x diversidade da fauna do solo em áreas recuperadas com espécies florestais. Repositório Alice
OLIVEIRA, E. P. de; RODRIGUES, M. do R. L..
Este trabalho teve como objetivo determinar a relação entre a diversidade da vegetação e a diversidade de grupos da mesofauna do solo em áreas recuperadas com espécies florestais na área petrolífera do Urucu.
Tipo: Artigo em anais de congresso (ALICE) Palavras-chave: Brasil; Amazonas; Urucu; Fauna Edáfica; Solo; Vegetação.
Ano: 2006 URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/679628
Imagem não selecionada

Imprime registro no formato completo
A Double Hurdle Model of Preferences for a Proposed Capacity Reduction Program in the Atlantic Shark Fishery AgEcon
Musengezi, Jessica D.; Rossi, Frederick J.; Larkin, Sherry L..
The Atlantic shark fishery is considered to be overcapitalized. One approach to capacity management is the purchase and permanent retirement of fishing vessels, fishing permits, or both under voluntary buyback programs. Representatives of the commercial shark fishery have proposed such an approach to manage the overcapacity in their fishery in the Gulf of Mexico and Atlantic regions. This program would allow owners to submit willingness-to-accept (WTA) bids for their permits and vessels. This study uses econometric modeling to explain the potential participation and bid amounts from a survey of permit owners.
Tipo: Conference Paper or Presentation Palavras-chave: Resource /Energy Economics and Policy.
Ano: 2006 URL: http://purl.umn.edu/35361
Imagem não selecionada

Imprime registro no formato completo
A double-hurdle model of Irish households' foodservice expenditure patterns AgEcon
Keelan, Conor D.; Henchion, Maeve M.; Newman, Carol F..
The aim of this paper is to analyse the various factors fuelling demand for Food- Away - From- Home (FAFH) in Ireland. The two largest components of this industry, the quick- service sector (fast food and takeaway) and the full- service sector (hotel and restaurant meals), are analysed using the most recently available Household Budget Survey data for Ireland. The results from a Box- Cox double hurdle model indicate that different variables affect expenditure in the different sectors in different ways. Income has a greater effect on full- service expenditure than on quick- service. Similarly households that are healthconscious indicate a greater preference for full- service meals while households with higher time values indicate a greater preference for...
Tipo: Conference Paper or Presentation Palavras-chave: Foodservice; Food- Away- From- Home; Quick- service; Fullservice; Food Consumption/Nutrition/Food Safety; D12; D13; C34; R2.
Ano: 2006 URL: http://purl.umn.edu/10083
Imagem não selecionada

Imprime registro no formato completo
A dual symbiosis shared by two mussel species, Bathymodiolus azoricus and Bathymodiolus puteoserpentis (Bivalvia : Mytilidae), from hydrothermal vents along the northern Mid-Atlantic Ridge ArchiMer
Duperron, Sebastien; Bergin, C; Zielinski, F; Blazejak, A; Pernthaler, A; Mckiness, Z; Dechaine, E; Cavanaugh, C; Dubilier, Nicole.
Bathymodiolus azoricus and Bathymodiolus puteoserpentis are symbiont-bearing mussels that dominate hydrothermal vent sites along the northern Mid-Atlantic Ridge (MAR). Both species live in symbiosis with two physiologically and phylogenetically distinct Gammaproteobacteria: a sulfur-oxidizing chemoautotroph and a methane-oxidizer. A detailed analysis of mussels collected from four MAR vent sites (Menez Gwen, Lucky Strike, Rainbow, and Logatchev) using comparative 16S rRNA sequence analysis and fluorescence in situ hybridization (FISH) showed that the two mussel species share highly similar to identical symbiont phylotypes. FISH observations of symbiont distribution and relative abundances showed no obvious differences between the two host species. In...
Tipo: Text Palavras-chave: Bacteria; Phylogeny; Fluorescence in situ hybridization (FISH); Methane oxidizer; Sulfur oxidizer; 16S rRNA; Endosymbiosis.
Ano: 2006 URL: http://archimer.ifremer.fr/doc/2006/publication-1864.pdf
Imagem não selecionada

Imprime registro no formato completo
A Duration Analysis of Poverty Transitions in Rural Kenya AgEcon
Kirimi, Lilian; Sindi, Kirimi.
Replaced with revised version of paper 10/04/07.
Tipo: Conference Paper or Presentation Palavras-chave: Community/Rural/Urban Development.
Ano: 2006 URL: http://purl.umn.edu/21475
Imagem não selecionada

Imprime registro no formato completo
A DYNAMIC ANALYSIS OF SUSTAINABLE FARMING SYSTEMS IN CALIFORNIA AGRICULTURE AgEcon
Wicks, Santhi; Howitt, Richard E.; Klonsky, Karen.
The economic viability of alternative and more sustainable agriculture farming systems depend on the value of farm profits. These values may be estimated through short or long-run of profit maximization, but there is a difference in these methods. In short-run profit maximization the instantaneous marginal benefits are equated to the marginal costs of production. Where as in the long-run maximization of profits the capital value of soil resources are quantify in addition to the direct revenues and costs of each system over time. A long-run approach is fundamental to capture the value of capital improvements in soil resources. In this study we use short-run experimental data from SAFS's rotations to calibrate the crop simulation model EPIC, and obtain a...
Tipo: Conference Paper or Presentation Palavras-chave: Farm Management.
Ano: 2006 URL: http://purl.umn.edu/21444
Imagem não selecionada

Imprime registro no formato completo
A Dynamic Approach to Estimate Theoretically Consistent US Meat Demand System AgEcon
Sulgham, Anil K.; Zapata, Hector O..
The paper conducts an empirical investigation of the US meat demand system using quarterly data on per capita meat consumption and prices. SUR maximum likelihood is used to estimate a static and dynamic (error correction) linear almost ideal demand systems. Results compare static and dynamic model elasticities.
Tipo: Conference Paper or Presentation Palavras-chave: Demand and Price Analysis; Food Consumption/Nutrition/Food Safety.
Ano: 2006 URL: http://purl.umn.edu/35441
Imagem não selecionada

Imprime registro no formato completo
A Dynamic Bioeconomic Model of Ivory Trade: Details and Extended Results AgEcon
van Kooten, G. Cornelis.
Trade in ivory is banned under CITES in an effort to protect the African elephant. The trade ban is supported by some range states, most notably Kenya, because they see the ban as an effective means for protecting a ‘flagship’ species, one that attracts tourists and foreign aid. It is opposed by some states, mainly in southern Africa, because their elephant populations are exceeding the capacity of local ecosystems with culling and other sources have resulted in the accumulation of large stocks of ivory. They argue that ivory trade will benefit elephant populations. The question of whether an ivory trade ban will protect elephant populations is addressed in this paper using a dynamic partial-equilibrium model that consists of four ivory exporting regions...
Tipo: Working or Discussion Paper Palavras-chave: Economics of elephant conservation; Economics of ivory trade; Trade bans; Cartels and quota; International Relations/Trade; F10; O55; Q26; Q27.
Ano: 2006 URL: http://purl.umn.edu/37030
Imagem não selecionada

Imprime registro no formato completo
A Dynamic Model of U.S. Sugar-Related Markets: A Cointegrated Vector Autoregression Approach AgEcon
Babula, Ronald A.; Newman, Douglas; Rogowsky, Robert A..
The methods of the cointegrated vector autoregression (VAR) model are applied to monthly U.S. markets for sugar and for sugar-using markets for confectionary, soft drink, and bakery products. Primarily a methods paper, we apply Johansen and Juselius' advanced procedures to these markets for perhaps the first time, with focus on achievement of a statistically adequate model through analysis of a battery of advanced statistical diagnostic tests and on exploitation of the system's cointegration properties through rank restrictions, statistically supported hypotheses test restrictions, and inference. The VEC model results illuminate the estimates of crucial policy-relevant market parameters that drive these markets, as well as the dynamic nature of the...
Tipo: Journal Article Palavras-chave: Agribusiness.
Ano: 2006 URL: http://purl.umn.edu/9084
Imagem não selecionada

Imprime registro no formato completo
A Dynamic Principal-Agent Model of Human-Mediated Aquatic Species Invasions AgEcon
MacPherson, Alexander J.; Moore, Rebecca; Provencher, Bill.
This paper presents a dynamic principal-agent model of aquatic species invasions in which a manager, concerned about the spread of invasive species across lakes by boaters, sets interseasonal management controls on a lake-by-lake basis, and boaters make a series of intraseasonal trip decisions to maximize random utility during the course of the season, conditional on the controls imposed by the manager. The results of a simulated invasion of Eurasian watermilfoil (Myriophyllum spicatum) highlight interesting aspects of the optimal management policies under two different management objectives: maximizing boater welfare and minimizing milfoil spread.
Tipo: Journal Article Palavras-chave: Invasive species; Random utility model; Eurasion watermilfoil; Dynamic optimiza-tion; Principal-agent; Resource /Energy Economics and Policy.
Ano: 2006 URL: http://purl.umn.edu/10189
Imagem não selecionada

Imprime registro no formato completo
A Dynamic Risk Optimization Model for Evaluating Profitable and Feasible Water Management Plans AgEcon
Grove, Bennie; Oosthuizen, L.K.; Backeberg, G.R..
Currently the South African government is advocating the cultivation of high valued crops and more efficient use of available water resources through the adoption o f more efficient irrigation technology and irrigation scheduling. A requirement of the National Water Act (Act 36 of 1998) is the compilation of water management plans. The main objective of this paper is to develop a multiperiod mathematical risk programming model able of assisting water user associations with the compilation of water management plans that are both profitable and feasible. Special care was taken to represent canal capacities and irrigation system application rates in the model. Risk simulation procedures are used to generate an appropriately correlated inter- and...
Tipo: Conference Paper or Presentation Palavras-chave: Dynamic Linear Programming; Risk; Irrigation; Feasibility; South Africa; Resource /Energy Economics and Policy; C6; Q15; Q12.
Ano: 2006 URL: http://purl.umn.edu/25554
Registros recuperados: 15.277
Primeira ... 2345678910 ... 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