Archives—December 2011

Implantable Wireless Biosensors

Thursday December 8, 2011 4:00-5:00 p.m.
ME-EM building, Room 112

Associate Professor Keat Ghee Ong
Michigan Technological University, Department of Biomedical Engineering

Force or pressure evaluation is important for a biomedical implantable device to ensure its proper function and safety. However, it is very challenging to measure local force/pressure inside a human body, even with the latest technologies. Imaging techniques such as MRI can pinpoint the location and measure the shape of the implant but cannot directly measure local pressure. Probe-based pressure sensors, while accurate, need an access route to the implant. This presentation will focus on the design and fabrication of wireless, passive implantable sensors based on magnetically-soft, magnetoelastic materials. Applications of these sensors include long-term monitoring of pressure in an abdominal aortic aneurysm sac after a stenting procedure to detect potential leakage from the stent graft, or measuring contact forces at knee implants for early detection of implant failure.

Lane changing and lane choice across different age groups under multiple levels of cognitive demand

Thursday December 1, 2011 4:00-5:00 p.m.
ME-EM building, Room 112

Assistant Professor Birsen Donmez
University of Toronto in Mechanical and Industrial Engineering Department and the director of the Human Factors and Applied Statistics Laboratory (HFASt)

Previous research suggests that drivers change lanes less frequently during periods of heightened cognitive load. However, lane changing behavior of different age groups under varying levels of cognitive demand is not well understood. Moreover, the majority of studies which have evaluated lane changing behavior under cognitive workload have been conducted in driving simulators. Consequently, it is unclear if the patterns observed in these simulation studies carry over to field driving. In this talk, I will present the results of an on-road study in which three age groups (20-29, 40-49, and 60-69) were monitored in an instrumented vehicle under varying levels of cognitive demand to determine the effects of age and cognitive demand on lane choice and lane changing behavior.