Sabiia Seb
PortuguêsEspañolEnglish
Embrapa
        Busca avançada

Botão Atualizar


Botão Atualizar

Ordenar por: RelevânciaAutorTítuloAnoImprime registros no formato resumido
Registros recuperados: 50
Primeira ... 123 ... Última
Imagem não selecionada

Imprime registro no formato completo
A matter of ephemerality: the study of Kel Tadrart Tuareg (southwest Libya) campsites via quantitative spatial analysis Ecology and Society
Biagetti, Stefano; CaSEs - Complexity and Socio-Ecological Dynamics group; Universitat Pompeu Fabra, Department of Humanities; School of Geography, Archaeology, and Environmental Studies, University of the Witwatersrand; stefano.biagetti@upf.edu; Crema, Enrico R.; CaSEs - Complexity and Socio-Ecological Dynamics group; Universitat Pompeu Fabra, Department of Humanities; UCL Institute of Archaeology; enrico.crema@upf.edu.
We examined the settlement structure from the Kel Tadrart Tuareg, a small pastoral society from southwest Libya. Our objective was to apply spatial analysis to establish the statistical significance of specific patterns in the settlement layout. In particular, we examined whether there is a separation between domestic and livestock spaces, and whether particular residential features dedicated to guests are spatially isolated. We used both established statistical techniques and newly developed bespoke analyses to test our hypotheses, and then discuss the results in the light of possible applications to other case studies.
Tipo: Peer-Reviewed article Palavras-chave: Campsites; Kel Tadrart Tuareg; Settlement layout; Spatial analysis.
Ano: 2016
Imagem não selecionada

Imprime registro no formato completo
A Mixed Geographically Weighted Approach to Decoupling and Rural Development in the EU-15 AgEcon
Pecci, Francesco; Sassi, Maria.
The CAP reform and the recent EC communication aimed at preparing its Health Check emphasise the need for interventions locally based where agricultural policy integrates with a broader policy for rural areas growth. In this context, the paper investigates the possible different sets policy indicators affecting agricultural productivity at the regional level considering spatial heterogeneity by means of a Mixed Geographically Weighted Regression approach. The analysis is based on a set of policy sensitive indicators selected according to the key component of the CAP reform and referred to a sample of 164 EU-15 regions at NUTS2 level. The methodology adopted, new for the empirical literature on the topic, allows for a more accurate understanding of spatial...
Tipo: Conference Paper or Presentation Palavras-chave: CAP reform; Agricultural productivity; Spatial analysis; Cluster analysis; Agricultural and Food Policy; Community/Rural/Urban Development; Research Methods/ Statistical Methods.
Ano: 2008 URL: http://purl.umn.edu/6625
Imagem não selecionada

Imprime registro no formato completo
Agricultural and Economic Convergence in the EU Integration Process: Do Geographical Relationships Matter? AgEcon
Sassi, Maria; Pecci, Francesco.
In the light of the reaffirmed importance of agricultural convergence within the integration process, the paper provides a preliminary investigation of the impact of the enlargement from the EU-15 to the EU-27 on agricultural real b-convergence and, with reference to the EU-27, of its relationship with economic catching-up process. The empirical analysis, based on a GWR approach, takes into account the regional spatial interdependences in estimating local parameters of convergence. The approach adopted allows to overcome the contradictory results from OLS estimations and parametric spatial econometric models pointed out by the literature and primarily connected to the existence of no unique convergence rate all over Europe. The analysis is based on a...
Tipo: Conference Paper or Presentation Palavras-chave: Regional convergence; Spatial analysis; GWR approach; International Relations/Trade.
Ano: 2008 URL: http://purl.umn.edu/44459
Imagem não selecionada

Imprime registro no formato completo
An analysis of the spatial and temporal patterns of greenhouse gas emissions by agriculture in Western Australia and the opportunities for agroforestry offsets AgEcon
Kingwell, Ross S.; Harris-Adams, Keely.
If agriculture is included in an Australian emissions trading scheme then it may face from 2015 at the earliest, a price for its greenhouse gas emissions; and thereby have incentives to offset and lessen its emissions. Yet because there is currently little understanding of the spatial pattern of emissions in agricultural regions of Australia, the extent of the challenge the sector faces in reducing its emissions is not fully recognised. To improve our understanding, this study uses the National Greenhouse Accounts methodology to estimate the spatial and temporal patterns of agricultural emissions since 1990 in the key agricultural region in Australia’s southwest. This region generates almost 40 percent of the nation’s winter crop production and supports...
Tipo: Conference Paper or Presentation Palavras-chave: Greenhouse gas emissions; Spatial analysis; Agriculture; Offsets; Sequestration.
Ano: 2009 URL: http://purl.umn.edu/48161
Imagem não selecionada

Imprime registro no formato completo
An Empirical Analysis of Market Integration and Efficiency for U.S. Fresh Tomato Markets AgEcon
Padilla-Bernal, Luz E.; Thilmany, Dawn D.; Loureiro, Maria L..
Fresh tomato trade between the United States and Mexico grew significantly during the 1990s. Moreover, major structural changes in U.S. produce marketing channels increase the complexity of conducting analyses to delineate the impact of liberalized trade. Following the work of Barrett, Li, and Bailey, this study implements a mixed distribution to examine spatial-price relationships between major shipping points and terminal markets for Mexican imported, and Florida and California tomatoes. Although markets are often efficiently integrated, results suggest strategic pricing and product shipments may exist and vary among terminal markets in Los Angeles, Boston, and Chicago.
Tipo: Journal Article Palavras-chave: Market integration; North American tomato trade; Spatial analysis; Tomato markets; Industrial Organization.
Ano: 2003 URL: http://purl.umn.edu/31061
Imagem não selecionada

Imprime registro no formato completo
Análisis exploratorio de las preferencias ambientales por rangos de talla de las hembras maduras e impregnadas de langostino Pleoticus muelleri (Bate, 1888) del Golfo San Jorge. Períodos analizados: noviembre - diciembre de 2008 y enero - febrero de 2009 OceanDocs
Fernández, M..
En este estudio se presenta el análisis de la relación entre los valores de densidad de hembras maduras y de hembras impregnadas de langostino Pleoticus muelleri (Bate, 1888) del Golfo San Jorge y las variables ambientales. Los datos analizados provienen de las campañas de investigación del INIDEP OB-03/08 y OB-01/09 realizadas en noviembre-diciembre de 2008 y en enero-febrero de 2009, respectivamente; en el área comprendida entre las latitudes 43º 20´ S y 47º 00´ S y el meridiano 64º 00´ W y la costa. Se consideraron las variables biológicas: densidad de hembras maduras y de hembras impregnadas de langostino, por rango de tallas y las variables ambientales: profundidad, temperatura y salinidad de agua de fondo así como, la diferencia de temperatura y de...
Tipo: Theses and Dissertations Palavras-chave: Females; Sexual maturity; Spawning grounds; Environmental conditions; Spatial analysis; Statistical models; Shrimp fisheries.
Ano: 2009 URL: http://hdl.handle.net/1834/5159
Imagem não selecionada

Imprime registro no formato completo
Climate change and plant diseases Scientia Agricola
Ghini,Raquel; Hamada,Emília; Bettiol,Wagner.
Human activities are altering greenhouse gas concentrations in the atmosphere and causing global climate change. In the near future, there will certainly be changes in the Brazilian phytosanitary scenario attributed to global climate change. The impacts of climate change can be positive, negative or neutral, since these changes can decrease, increase or have no impact on diseases, depending on each region or period. These impacts will also be observed on plants and other organisms as well as on other agroecosystem components. However, these impacts are not easily determined, and consequently, specialists from several areas must go beyond their disciplinary boundaries and placing the climate change impacts in a broader context. This review focuses on the...
Tipo: Info:eu-repo/semantics/article Palavras-chave: CO2; Global climate change; Global warming; Spatial analysis; Control.
Ano: 2008 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162008000700015
Imagem não selecionada

Imprime registro no formato completo
Comparison of individual-based model output to data using a model of walleye pollock early life history in the Gulf of Alaska ArchiMer
Hinckley, Sarah; Parada, Carolina; Horne, John K.; Mazur, Michael; Woillez, Mathieu.
Biophysical individual-based models (IBMs) have been used to study aspects of early life history of marine fishes such as recruitment, connectivity of spawning and nursery areas, and marine reserve design. However, there is no consistent approach to validating the spatial outputs of these models. In this study, we hope to rectify this gap. We document additions to an existing individual-based biophysical model for Alaska walleye pollock (Gadus chalcogrammus), some simulations made with this model and methods that were used to describe and compare spatial output of the model versus field data derived from ichthyoplankton surveys in the Gulf of Alaska. We used visual methods (e.g. distributional centroids with directional ellipses), several indices (such as...
Tipo: Text Palavras-chave: Mathematical models; Statistical analysis; Marine fish; Spatial distributions; Spatial analysis; Individual-based models; USA gulf of alaska; Walleye pollock.
Ano: 2016 URL: http://archimer.ifremer.fr/doc/00327/43775/43332.pdf
Imagem não selecionada

Imprime registro no formato completo
Cost-Effectiveness of Nutrient Management and Buffers: Comparisons of Two Spatial Scenarios AgEcon
Bonham, John G.; Bosch, Darrell J.; Pease, James W..
Farmers and taxpayers would benefit from more cost-effective agricultural nutrient pollution control measures. The objectives of our study are (1) to assess compliance costs and reductions in phosphorus loadings from implementation of nutrient management and riparian buffers; and (2) to estimate how the spatial scenario, which is the method of representing farms within the watershed, affects estimated compliance costs and reductions in phosphorus deliveries. Estimated compliance costs are quite sensitive to the spatial scenario. Buffers are more cost-effective than nutrient management under one of the two spatial scenarios, whereas nutrient management is more cost-effective under the other scenario. Shifts to more erosive crops reduce the effectiveness...
Tipo: Journal Article Palavras-chave: Compliance costs; Geographic information systems (GIS); Mathematical programming; Nutrient management; Phosphorus (P); Pollution abatement; Riparian buffers; Spatial analysis; Environmental Economics and Policy; Land Economics/Use; Q12; Q52.
Ano: 2006 URL: http://purl.umn.edu/43746
Imagem não selecionada

Imprime registro no formato completo
DETERMINANTS OF AGRICULTURAL LAND ABANDONMENT IN POST-SOVIET EUROPEAN RUSSIA AgEcon
Prishchepov, Alexander V.; Radeloff, Volker C.; Muller, Daniel; Dubinin, Maxim; Baumann, Matthias.
Socio-economic and institutional changes may accelerate land-use and land-cover change. Our goal was to explore the determinants of agricultural land abandonment within one agro-climatic and economic region of post-Soviet European Russia during the first decade of transition from a state-command to market-driven economy (between 1990 and 2000). We integrated maps of abandoned agricultural land derived from 30 m resolution Landsat TM/ETM+ images, environmental and socioeconomic variables and estimated logistic regressions. Results showed that post-Soviet agricultural land abandonment was significantly associated with lower average grain yields in the late 1980s, higher distance from the populated places, areas with low population densities, for isolated...
Tipo: Conference Paper or Presentation Palavras-chave: Agricultural land abandonment; Institutional change; Land use change; Spatial analysis; Logistic regression; Remote sensing; Russia; Agribusiness; Q15.
Ano: 2011 URL: http://purl.umn.edu/115363
Imagem não selecionada

Imprime registro no formato completo
DETERMINANTS OF TECHNICAL EFFICIENCY IN AGRICULTURE AND CATTLE RANCHING: A SPATIAL ANALYSIS FOR THE BRAZILIAN AMAZON AgEcon
Igliori, Danilo Camargo.
The determinants of technical efficiency in agriculture and cattle ranching are closely related with the debate involving the conservation-development trade-off in the Brazilian Amazon. Concerned with balancing development and environmental conservation, policy makers and academics have emphasized the importance of choosing ways of selecting areas where land use restrictions would be established. In order to understand the relationship between spatial patterns of deforestation and the associated distribution and characteristics of economic activity, issues regarding technical efficiency are clearly important. This paper aims to identify the socio-economic and environmental determinants of technical efficiency in agriculture and cattle ranching in the...
Tipo: Working or Discussion Paper Palavras-chave: Stochastic frontier; Technical efficiency; Spatial analysis; Brazilian Amazon; Livestock Production/Industries; Productivity Analysis; Research and Development/Tech Change/Emerging Technologies.
Ano: 2005 URL: http://purl.umn.edu/31927
Imagem não selecionada

Imprime registro no formato completo
District-level Spatial Analysis of Migration Flows in Ghana: Determinants and Implications for Policy AgEcon
Tsegai, Daniel W.; Le, Quang Bao.
The present study investigates the determinants of inter-district migration flows over the 1995-2000 period in Ghana. A combination of socio-economic, natural and spatial ‘district-level’ attributes are considered as potential variables explaining the direction of migration flows. In addition to the ‘net’ migration model, ‘in’ and ‘out’ migration models are also employed within the context of the gravity model. Results in the three models consistently show that people move out of districts with less employment and choose districts with high employment rate as destinations. While shorter distance to roads encourages out-migration, districts with better water access seem to attract migrants. Generally, people move out of predominantly agrarian districts to...
Tipo: Working or Discussion Paper Palavras-chave: Gross migration; Net migration; Inter-district migration flows; Spatial analysis; Ghana; Africa; Community/Rural/Urban Development; Labor and Human Capital.
Ano: 2010 URL: http://purl.umn.edu/98131
Imagem não selecionada

Imprime registro no formato completo
Estimating Travel Cost Model: Spatial Approach AgEcon
Kim, Seung Gyu; Bowker, James Michael; Cho, Seong-Hoon; Lambert, Dayton M.; English, Donald B.K.; Starbuck, C. Meghan.
Tipo: Working or Discussion Paper Palavras-chave: Travel cost model; Spatial analysis; Environmental Economics and Policy.
Ano: 2010 URL: http://purl.umn.edu/61774
Imagem não selecionada

Imprime registro no formato completo
Experimental precision in corn trials using the Papadakis method Ciência e Agrotecnologia
Storck,Lindolfo; Lopes,Sidinei José; Cargnelutti Filho,Alberto; Lúcio,Alessandro Dal'Col; Toebe,Marcos.
The objective of this work was to verify whether the use of the Papadakis method in competing corn hybrid trials would lead to modifications in the validity of assumptions for the mathematical model of variance analysis and for experimental precision indicators. To achieve this, corn-grain-yield data from 25 competing corn hybrid trials, performed in a design of complete randomized blocks, were examined. Each trial entailed verification of assumptions, variance analysis, hypothesis tests, statistics to identify experimental precision, and analysis using the Papadakis method. This method improves experimental precision indicators. The assumptions were valid for both analysis types (without Papadakis and with Papadakis). Mean figures for the Fasoulas...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Zea mays L.; Assumptions; Precision measurements; Spatial analysis.
Ano: 2010 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-70542010000600015
Imagem não selecionada

Imprime registro no formato completo
Ferramenta de análise de crédito rural: espacializando dados para o Pantanal. Repositório Alice
FIGUEIREDO, V. A. de; SILVA, J. dos S. V. da; CASTRO, E. C. de; ANDRADE, D. D. de.
O Pantanal brasileiro está situado na bacia do Alto Paraguai, com 138.183 km², ocupando 38,21% da área da bacia. O governo Federal tem direcionado cada vez mais recursos para o crédito rural, que visa ao apoio financeiro às atividades agropecuárias ou não-agropecuárias, em estabelecimentos rurais ou em áreas comunitárias rurais próximas. Concomitantemente, novos recursos computacionais advindos da tecnologia da informação têm permitido a construção de sistemas interativos, que permitem a visualização e manipulação de dados geoespaciais, tornando-se uma poderosa ferramenta computacional, ágil e eficaz no suporte a análise dos dados envolvidos. É com esse intuito que o sistema SIAGEO Amazônia disponibiliza a ferramenta Módulo Bancário voltada especialmente...
Tipo: Artigo em anais de congresso (ALICE) Palavras-chave: SIAGEO Amazônia; Módulo bancário; Pantanal; Spatial analysis; Rural bank credit; Crédito rural.
Ano: 2016 URL: http://www.alice.cnptia.embrapa.br/handle/doc/1056680
Imagem não selecionada

Imprime registro no formato completo
Fire monitoring and spatial analysis for Brazilian Pantanal. Repositório Alice
PADOVANI, C. R.; CRUZ, M. L. L.; CRISPIM, S. M. A.; SANTOS, S. A..
2008
Tipo: Resumo em anais de congresso (ALICE) Palavras-chave: Monitoring; Spatial analysis; Pantanal.
Ano: 2008 URL: http://www.alice.cnptia.embrapa.br/handle/doc/812755
Imagem não selecionada

Imprime registro no formato completo
GIS and Remote Sensing to Support Precision Viticulture for Analysis of Vineyards in the Campanha Wine Region, Brazil Repositório Alice
HOFF, R.; DUCATI, J.R.; FARIAS, A. R..
Agricultural products depend upon the geographical area of production and their quality depends on environment and crop management. Grapevine cultivars can be adapted to the environment, resulting in differences in fruit quality, which will produce different wines. The knowledge of the territory gives value to agricultural products and the use of free software has advantages to associate spatial data with Geographical Information System (GIS) functions for Digital Image Processing (DIP), spatial analysis, Digital Elevation Models (DEM) and databases. The objective of this study was analyze spatially vineyards of Vitis vinifera in south Brazil, using DEM for zoning landscape and employing RapidEye images at different crop stages, in order to follow the...
Tipo: Artigo em periódico indexado (ALICE) Palavras-chave: GIS; Image processing; Spatial analysis; Vineyard.
Ano: 2017 URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1067293
Imagem não selecionada

Imprime registro no formato completo
GIS and Remote Sensing to Support Precision Viticulture for Analysis of Vineyards in the Campanha Wine Region, Brazil Repositório Alice
HOFF, R.; DUCATI, J.R.; FARIAS, A. R..
Agricultural products depend upon the geographical area of production and their quality depends on environment and crop management. Grapevine cultivars can be adapted to the environment, resulting in differences in fruit quality, which will produce different wines. The knowledge of the territory gives value to agricultural products and the use of free software has advantages to associate spatial data with Geographical Information System (GIS) functions for Digital Image Processing (DIP), spatial analysis, Digital Elevation Models (DEM) and databases. The objective of this study was analyze spatially vineyards of Vitis vinifera in south Brazil, using DEM for zoning landscape and employing RapidEye images at different crop stages, in order to follow the...
Tipo: Artigo em periódico indexado (ALICE) Palavras-chave: GIS; Image processing; Spatial analysis; Vineyard.
Ano: 2016 URL: http://www.alice.cnptia.embrapa.br/handle/doc/1071475
Imagem não selecionada

Imprime registro no formato completo
High-resolution facies zonation within a cold-water coral mound: The case of the Piddington Mound, Porcupine Seabight, NE Atlantic ArchiMer
Lim, Aaron; Wheeler, Andrew J.; Arnaubec, Aurelien.
Framework-forming cold-water corals (CWC's) such as Lophelia pertusa and Madrepora oculata generate positive topographic features on the seabed called CWC mounds. In the North East Atlantic, CWC mounds have been studied in detail and reveal heterogeneous spatial on-mound organisation of coral patches. Many of these studies are limited by a paucity of remotely-sensed and video imagery at an appropriate resolution and coverage. This study is the first attempt to video mosaic an entire CWC mound (the Piddington Mound of the Moira Mounds, Porcupine Seabight, Irish margin). The mosaic is divided into 18,980 0.25 m2 cells with a manual classification applied to each within a geographic information system (GIS). Geospatial analysis shows that cell distribution is...
Tipo: Text Palavras-chave: Cold-water coral; Habitat mapping; Spatial analysis; Sediments; Fades distribution.
Ano: 2017 URL: http://archimer.ifremer.fr/doc/00390/50129/50732.pdf
Imagem não selecionada

Imprime registro no formato completo
HUMAN CAPITAL AND FARM HOUSEHOLDS: A MAP OF MANAGEMENT MODELS IN ITALY AgEcon
Idda, Lorenzo; Furesi, Roberto; Pulina, Pietro.
This paper is designed to verify empirically the choices that Italian farm households make when investing in human capital. Census data from the National Institute of Statistics (Istat) were used to describe the main structural and organisational characteristics of the farms. Multivariate statistical tools were used to process the information in the database, so that the different types of Italian farm households could be defined and geographically located. The results allowed us to analyse the competence endowment inside the family farm by determining the existence, the types and the strength of the relationships between the characteristics of family farms and certain variables which described the specific local environment and the human capital available...
Tipo: Conference Paper or Presentation Palavras-chave: Human capital; Household farms; Agricultural labour; Spatial analysis; Agribusiness; Community/Rural/Urban Development; Labor and Human Capital.
Ano: 2009 URL: http://purl.umn.edu/57415
Registros recuperados: 50
Primeira ... 123 ... 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