10 documents found, page 1 of 1
Continuous monitoring of the spatio-temporal patterns of surface water in respo...
Feng, Yujie; Dessay, Nadine; Delaitre, Eric; Gurgel, Helen da Costa; Gong, PengMediterranean coastal lagoons and their peripheral areas often provide a collection of habitats for many species, and they often face significant threats from anthropogenic activities. Diverse human activities in such areas directly affect the spatio-temporal dynamic of surface water and its ecological characteristics. Monitoring the surface water dynamic, and understanding the impact of human activities are of...
Apports de la combinaison d’images satellites optique et RADAR dans l’étude des...
Catry, Thibault; Pottier, Auréa; Marti, Renaud; Li, Zhichao; Roux, Emmanuel; Herbreteau, Vincent; Mangeas, Morgan; Demagistri, LaurentA distribuição dos mosquitos vetores da malária é controlada por vários fatores, como clima, tipos de cobertura do solo ou uso da terra, ou atividades humanas. Na região amazônica, persistem focos endêmicos de malária, particularmente na fronteira entre a Guiana Francesa e o Estado do Amapá no Brasil. Esta área, com mais de 300 km de extensão, apresenta muitas dificuldades na coleta de informações necessárias p...
Semi-supervised text classification framework : an overview of Dengue landscape...
Li, Zhichao; Gurgel, Helen da Costa; Dessay, Nadine; Hu, Luojia; Xu, Lei; Gong, PengIn recent years there has been an increasing use of satellite Earth observation (EO) data in dengue research, in particular the identification of landscape factors affecting dengue transmission. Summarizing landscape factors and satellite EO data sources, and making the information public are helpful for guiding future research and improving health decision-making. In this case, a review of the literature would...
A mapping review on urban landscape factors of Dengue retrieved from earth obse...
Marti, Renaud; Li, Zhichao; Catry, Thibault; Roux, Emmanuel; Mangeas, Morgan; Handschumacher, Pascal; Gaudart, Jean; Tran, Annelise; Demagistri, LaurentTo date, there is no effective treatment to cure dengue fever, a mosquito-borne disease which has a major impact on human populations in tropical and sub-tropical regions. Although the characteristics of dengue infection are well known, factors associated with landscape are highly scale dependent in time and space, and therefore difficult to monitor. We propose here a mapping review based on 78 articles that st...
Estimativa populacional pelo modelo people in pixel aplicado ao estudo da dengu...
Gregório, Leandro da Silva; Gurgel, Helen da Costa; Dessay, Nadine; Sousa, Gustavo Mota de; Roux, EmmanuelEm estudos sobre problemas de saúde, a obtenção de dados demográficos espacializados é essencial para a compreensão dos processos de transmissão e dispersão de doenças, bem como para o cálculo da taxa de incidência, que são fundamentais para as estratégias de controle e de prevenção. O desenvolvimento e a aplicação de métodos de estimativa populacional, em escala de detalhe, visando à obtenção do número da popu...
Toward an early warning system for health issues related to particulate matter ...
Roux, Emmanuel; Ignotti, Eliane; Bègue, Nelson; Bencherif, Hassan; Catry, Thibault; Dessay, Nadine; Gracie, Renata; Gurgel, Helen da Costa: PM2.5 severely affects human health. Remotely sensed (RS) data can be used to estimate PM2.5 concentrations and population exposure, and therefore to explain acute respiratory disorders. However, available global PM2.5 concentration forecast products derived from models assimilating RS data have not yet been exploited to generate early alerts for respiratory problems in Brazil. We investigated the feasibility...
Comparative study of the 1982-1983 and 1997-1998 El Nino events over different ...
Dessay, Nadine; Laurent, Henri; Machado, Luiz Augusto Toledo; Shimabukuro, Yosio Edemir; Batista, Getulio Teixeira; Diedhiou, A; Ronchail, JosyaneMade available in DSpace on 2019-09-12T16:53:45Z (GMT). No. of bitstreams: 0 Previous issue date: 2004; This work presents results which help to understand the behaviour of the Normalized Difference Vegetation Index (NDVI) anomalies over the South America continent during the two strongest El Nino events of the last century (1982-1983 and 1997-1998). The data used are parts of a long-term series ( July 1981 to ...
Regionalization of a landscape-based hazard index of malaria transmission : an ...
Zhichao, Li; Catry, Thibault; Dessay, Nadine; Gurgel, Helen da Costa; Almeida, Cláudio Aparecido de; Barcellos, Christovam; Roux, EmmanuelIdentifying and assessing the relative effects of the numerous determinants of malaria transmission, at different spatial scales and resolutions, is of primary importance in defining control strategies and reaching the goal of the elimination of malaria. In this context, based on a knowledge-based model, a normalized landscape-based hazard index (NLHI) was established at a local scale, using a 10 m spatial reso...
Wetlands and malaria in the Amazon: guidelines for the use of synthetic apertur...
Catry, Thibault; Zhichao, Li; Roux, Emmanuel; Herbreteau, Vincent; Gurgel, Helen da Costa; Mangeas, Morgan; Seyler, Frédérique; Dessay, NadineThe prevention and control of mosquito-borne diseases, such as malaria, are important health issues in tropical areas. Malaria transmission is a multi-scale process strongly controlled by environmental factors, and the use of remote-sensing data is suitable for the characterization of its spatial and temporal dynamics. Synthetic aperture radar (SAR) is well-adapted to tropical areas, since it is capable of imag...
Land cover, land use and malaria in the Amazon : a systematic literature review...
Stefani, Aurélia; Dusfour, Isabelle; Corrêa, Ana Paula S. A.; Cruz, Manoel C. B.; Dessay, Nadine; Galardo, Allan K. R.; Galardo, Clícia D.The nine countries sharing the Amazon forest accounted for 89% of all malaria cases reported in the Americas in 2008. Remote sensing can help identify the environmental determinants of malaria transmission and their temporo-spatial evolution. Seventeen studies characterizing land cover or land use features, and relating them to malaria in the Amazon subregion, were identified. These were reviewed in order to im...