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Global aerosol direct radiative forcing (DRF) is an important metric for assessing potential climate impacts of future emissions changes. However, the radiative consequences of emissions perturbations are not readily quantified nor well understood at the level of detail necessary to assess realistic policy options. To address this challenge, here we show(More)
The Environmental Protection Agency (EPA)'s Office of Air Quality Planning and Standards (OAQPS) is building a new Emissions Modeling Framework (EMF) that will solve many of the long-standing difficulties of emissions modeling. The goals of the Framework are to (1) prevent bottlenecks and errors caused by emissions modeling activities, (2) develop software(More)
The National-Scale Air Toxics Assessment (NATA) for 1996 is a nationwide study of the potential inhalation exposures and health risks associated with thirty-two air toxics and diesel particulate matter. Our research objectives are: i) develop a methodology for quantifying the uncertainty in the NATA results, and ii) demonstrate the use of the methodology in(More)
Treating periodontitis which involves the mesial concavity of the maxillary first bicuspid can be very challenging. Fifty extracted adolescent maxillary first bicuspids were sectioned in 2-mm thick sections apical to the cementoenamel junction (CEJ). The mesial concavity depth and the cementum and dentin thickness were measured in the sections. The(More)
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