Marc J. Jaeger, M.D. Professor Emeritus Phone: (352) 273-5829 Fax: (352) 846-0270 Office: CG-020D E-mail: mjaeger@phys.med.ufl.edu Publications: Search PubMed

My research interest is in respiration physiology and in bioengineering. I work in close collaboration with clinicians and with engineers. One line of research is directed toward the study of high frequency ventilation. This is a novel type of a mechanical life support system in which high frequencies (up to 2,000 breaths/minute) are combined with very small tidal volumes. This research has led to an intense investigation of dispersion in oscillatory flow.

It was found that a major component of the mechanism that transports gases in high-frequency ventilation is this dispersion. It is most effective in long, cylindrical tubes; branching reduces its effectiveness. In cylindrical tubes, dispersion can be tuned for maximal effect (Phys. Fluids 29:1324, 1986). Gases and solutes are found to be transported at rates that are inversely proportional to their molecular diffusion coefficients (Phys. Fluids 27:1046, 1984, and 30:1023, 1987; Sep. Sc. Technol. 26:503, 1991). The use of counterflow was found to raise the separation by orders of magnitude (Sep. Sc. Technol. 27:691, 1992). The use of a specially designed absorber was found to raise the yield substantially (Sep. Sc. Technol. 31:987, 1996). Finally, optimization was sought (Eng. Sc. Tech., 1998).

I am also interested in history, especially the history of the Middle East in the first century B.C. and first century A.D., and in religious art.