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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
1

AAAneurysm Outreach Screening Data and Emergency Healthcare Accessibility in Louisiana: Identifying High-Risk Populations for Targeted Interventions

Poole, Amy M 01 August 2016 (has links)
Abdominal aortic aneurysms are the third leading cause of sudden death in men 60 years and over. AAAneurysm Outreach provides free screenings to residents of Louisiana and beyond. Service areas were calculated for each AAAneurysm Outreach screening event location and stroke center. Data provided by the 2010 U.S. Census, the American Community Survey, and the Behavioral Risk Factor Surveillance System were used to describe demographics of the underserved populations and to identify high-risk areas for targeted interventions. Twenty-five percent of age-eligible Louisianans reside outside optimal drive-time-to-screening-event zones but within spatially clustered areas of increased prevalence rates. The maximum drive-time-to-treatment zones excluded 1,395 residents 65 years and over from timely access to emergency medical care. Results revealed limitations in the geographic breadth of the screening program and small disparities in accessibility to emergency healthcare.
2

Avaliação de krigagens através de indicadores locais para a agricultura de precisão / Evaluation krigings by means of local indicators for precision agriculture

Pinheiro, Wagner Rogério Ferreira 28 February 2013 (has links)
Made available in DSpace on 2015-03-26T13:32:18Z (GMT). No. of bitstreams: 1 texto completo.pdf: 3277635 bytes, checksum: d8f87471e2b1a001fcaef930bd261f59 (MD5) Previous issue date: 2013-02-28 / Coordenação de Aperfeiçoamento de Pessoal de Nível Superior / Agribusiness covers a vast chain of production activities. Can be noted as one of the activities of this branch precision agriculture that relies often georeferenced information to describe through the spatial maps of certain areas. One technique that has high importance in this context is the Geostatistics, it provides obtaining thematic maps, considering the spatial dependence structure of the phenomenon under study. So this study presents a procedure to identify subareas for planting considering the spatial dependence of the variable of interest without the need for categorization. For both methodologies are addressed map algebra with the intention of incorporating measures of statistical association locally. In this way, we used the method of ordinary kriging in this Geostatistics and to measure the agreement of thematic maps used the Kappa index and linear correlation coefficient global and local. As main results can be noted that the agreement between the maps of localized form performed by Pearson's correlation shows that the spatial dependence models used ordinary kriging in place exerts influence in defining the thematic maps used in precision agriculture, aspect one that is not picked up used (in case agricultural) encodings of interpolated values (management zones) and draw up these global indices of agreement. / O agronegócio abrange uma vasta cadeia de atividades produtivas. Pode-se destacar como uma das atividades deste ramo a agricultura de precisão que se vale frequentemente de informações georreferenciadas para descrever por meio de mapas a variabilidade espacial de determinadas áreas. Uma técnica que apresenta relevada importância para este contexto é a Geoestatística, pois proporciona a obtenção de mapas temáticos, considerando a estrutura de dependência espacial do fenômeno em estudo. Assim este estudo apresenta um procedimento para identificar subáreas destinadas ao plantio considerando a dependência espacial da variável de interesse sem a necessidade de categorização. Para tanto são abordadas metodologias de álgebra de mapas com a intenção de incorporar medidas de associação estatística de forma local. Desde modo, foi utilizado o método de Krigagem Ordinária presente na Geoestatística e para medir a concordância dos mapas temáticos utilizou-se o índice Kappa e a coeficiente de correlação linear global e local. Como resultados principais pode-se destacar que a concordância entre os mapas de forma localizada evidencia que os modelos de dependência espacial utilizados na Krigagem Ordinária exercem influência local na definição dos mapas temáticos utilizados na agricultura de precisão, aspecto esse que não é captado se utilizadas (para o caso agrícola), codificações dos valores interpolados (zonas de manejo) e destas extrair-se índices globais de concordância.

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