Effective suspension and settling are critical for controlling biomass retention in a bioreactor. In this paper, a multi-fluid model with kinetic theory of granular flow (KTGF) was established to describe these phenomena in the biowaste particles flow in anaerobic digesters. Solid retention time...

This thesis consists of two essays analyzing related topics. The first essay investigates the role of search cost in electronic markets. It is the first to introduce product specificity to a search model which allows us to study both short term and long term effects of reducing search cost. It...

Department: Statistics.

Empirical likelihood inference is developed for censored survival data under the linear transformation models, which generalize Cox's [Regression models and life tables (with Discussion), J. Roy. Statist. Soc. Ser. B 34 (1972) 187-220] proportional hazards model. We show that the limiting...