«Molly Allen Nancy Steblay, Ph.D., Ben Denkinger, Ph.D. Psychology Eyewitness Memory Procedure with Older Adults Older adults make more identification ...»
Yer Yang David Murr, Ph.D.
Physics Designing an Air Sampling Instrument for Vertical Profiling of Motor Vehicle Pollution Air quality in densely populated urban areas surrounded by interstate highway system is an issue that spans social, political and environmental barriers. Therefore, gauging and addressing issues related to airborne pollutants is a growing area of research for scientist. Air sampling has helped researchers understand air quality that is affected by anthropogenic emissions. Volatile organic compounds like benzene are a form of pollution generated by motor vehicles and are heavily emitted into the air during traffic hours. The design of a low-cost sampling instrument prototype was developed for vertical profiling over the Interstate 94 in Minneapolis, Minnesota. The physical design included using a 3D printer for components and Arduino microcontroller programs were written to actuate servo-motors for mechanical purposes. Tedlar bags and a canister were tested at ground level sampling and analyzed by a protontransfer mass spectrometer (PT-MS) to determine which approach is most applicable for sampling VOCs.
The canister was chosen due to the contamination found in Tedlar bags that would affect the PT-MS analysis. We anticipate completing our prototype air sampling instrument in fall of 2014, after which we can begin collecting samples.
Ruifa Yang Keith Gilsdorf, Ph.D.
Economics Testing and Comparing Men and Women’s Tournament Incentives in Alpine Skiing Our research tries to test Lazear and Rosen’s (1981) tournament theory, which states that an athlete’s performance in a tournament depends on the tournament’s prize purse and distribution. We examine the prize structure’s effect on individual performance in the Giant Slalom event for both men and women’s professional skiing. This study estimates an empirical model using data containing information on tournament characteristics, player characteristics, tournament outcomes, and prize money distribution for all tournaments played during 2013 to 2014 FIS World Cup season. As an extension to Che and Humphreys’ (2013) study of women’s Alpine skiing, our research adds the men’s events to investigate possible gender differences in performance. Our results tend to support tournament theory predictions in two specifications of the women’s empirical model, but find no evidence to support the theory for men. In fact, our results indicate that male performance worsens as the prize distribution increases. In addition, we find that women respond differently to the vertical drop characteristic of the race venue. Women’s race times fall as the vertical drops rises while the opposite occurs for men. This may suggest that men take a more cautious approach compared to women skiers, but more research is needed.