D. L. Hicks

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Total Artificial Heart (TAH) development at Penn State University and 3M Health Care has progressed from design improvements and manufacturing documentation to in vitro and in vivo testing to characterize the system's hemodynamic response and energetic performance. The TAH system is completely implantable and intended for use as an alternative to(More)
Little information is available regarding the current patterns of medication use in long-term dialysis centers. Therefore, we surveyed the medication records of 1,023 patients undergoing long-term dialysis therapy in 27 dialysis centers. The mean number of medications prescribed per patient was 7.7 +/- 0.54, increasing patient age, increasing duration of(More)
Obesity in migratory birds appears to differ from obesity in man in that gains and losses in body weight do not involve changes in the tissue structure of the body; fat is added to and used from preexisting tissue spaces without appreciable change in the water content or the nonfat dry weight of the body as a whole. Evidence is presented which supports the(More)
Innovation is often cited as a panacea for the continued competitiveness of the US economy, and the higher education sector is considered vital in developing the productive and dynamic labor force critical for sustaining this innovation. But how effectively does the higher education sector meet the needs of the labor market? We design a crosswalk to match(More)
The total artificial heart under development by the Pennsylvania State University and 3M Health Care has undergone a number of design improvements to improve reliability, manufacturability, implantability, and performance. These improvements are nearing completion in preparation for formal durability testing. The redesigned implanted electronics canister,(More)
We estimate the causal influence of air quality in explaining pro-cyclical mortality across the United States in a dataset spanning nearly 300 cities over the period 1979-2013. Prior research has documented that accounting for air pollution attenuates the elasticity of mortality with respect to unemployment rates by up to 30% (Heutel and Ruhm, 2013). To(More)