Joseph P. Messina

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BACKGROUND Inequalities in geographic access to health care result from the configuration of facilities, population distribution, and the transportation infrastructure. In recent accessibility studies, the traditional distance measure (Euclidean) has been replaced with more plausible measures such as travel distance or time. Both network and raster-based(More)
Real time and spatially distributed T a (air temperature) data are desired for many applications. T s (land surface temperature) derived from remote sensors has been used to estimate T a in previous studies. Exploring MODIS Aqua T s and station measured daily maximum and minimum T a over east Africa, we found that T s did not agree well with T a during the(More)
BACKGROUND Community hospital placement is dictated by a diverse set of geographical factors and historical contingency. In the summer of 2004, a multi-organizational committee headed by the State of Michigan's Department of Community Health approached the authors of this paper with questions about how spatial analyses might be employed to develop a revised(More)
West Nile Virus is a vector-borne flavivirus that affects mainly birds, horses, and humans. The disease emerged in the United States in 1999 and by 2001 had reached Michigan. In clinical human cases, the most common symptoms are fever, weakness, nausea, headache, and changes in mental state. The crow is the most common wildlife host in the life cycle of the(More)
INTRODUCTION Recent publications surrounding Volunteered Geographic Information (VGI) broadly represent the belief among some in the academic community that non-scientists can be engaged in and benefit from spatial data analysis (Con-nors et al. a field previously reserved exclusively for academics. Focus on VGI represents a paradigm shift from viewing(More)
BACKGROUND Predictive models of malaria vector larval habitat locations may provide a basis for understanding the spatial determinants of malaria transmission. METHODS We used four landscape variables (topographic wetness index [TWI], soil type, land use-land cover, and distance to stream) and accumulated precipitation to model larval habitat locations in(More)
BACKGROUND Roemer's Law, a widely cited principle in health care policy, states that hospital beds that are built tend to be used. This simple but powerful expression has been invoked to justify Certificate of Need regulation of hospital beds in an effort to contain health care costs. Despite its influence, a surprisingly small body of empirical evidence(More)
BACKGROUND Community-based health care planning and regulation necessitates grouping facilities and areal units into regions of similar health care use. Limited research has explored the methodologies used in creating these regions. We offer a new methodology that clusters facilities based on similarities in patient utilization patterns and geographic(More)