Accurate and reliable detection of activities of daily living (ADL) is extremely difficult and it becomes even harder due to sensor node failures caused by hardware degradation, node displacement, inaccurate readings, and environmental changes. Once a fault is detected, we propose to evaluate its severity by using data replay analysis to determine if this fault could have caused errors in the p...

This paper evaluates the performance of job scheduling schemes for pure space sharing among rigid jobs. Conventional job scheduling schemes for the pure space sharing among rigid jobs have been achieved by First Come First Served (FCFS). However, FCFS has a drawback such that it can not utilize processors e ciently. This paper evaluates the performance of job scheduling schemes that are propose...

This essay, based on my 2012 MSOM Fellow Lecture, discusses an idea that has been useful for developing effective methods to set staffing levels in service systems: offered load analysis. The main idea is to tackle a hard problem by first seeking an insightful simplification. For capacity planning to meet uncertain exogenous demand, offered load analysis looks at the amount of capacity that wou...

Economic analyses may be used to describe the costs of health care programs and to ensure that value is obtained for the money spent. This issue of Diabetes Care includes three economic analyses. The first describes the incremental costs of diabetes over a lifetime and highlights how interventions to prevent diabetes may reduce lifetime costs (1). The second demonstrates that although an expens...