M. A. Baumhoff, Professor of Anthropology at the University of California, Davis, was born in Camino, California, on December 22, 1926. He died of cancer on March 27, 1983. After joining the Davis faculty in 1958, he served as Chairman of the Department of Anthropology from 1963 to 1966. For the next two years, during the heyday of so-called student unrest, he was the Vice Chancellor of Student Affairs at Davis.

My aim is to review and revise the post-Mazama (i.e., post-5000 B.C.) projectile point chronology for a portion of the Great Basin. The evolution of this chronology is considered briefly, and the current problems in its application are highlighted. Two kinds of new data are then brought to bear on the problems.

Saga America.Barry Fell. New York: Times Books, 1980, 425 pp., $15.00 (hardback).

I make but two simple points. The first is to describe an intriguing Diegueno artifact and point up how this artifact might serve as an analogy for some cases of prehistoric behavior. Secondly, I would like to goad archaeologists into venturing beyond the narrow range of hypotheses now in use. There is no need to simply write off stratigraphic anomalies as rodent disturbance or frost heaving (or sloppy excavation). What about testing for temporal curation? We can overextend any argument, of course, and no single hypothesis will serve us unflaggingly. In fact, the heirloom hypothesis will undoubtedly be rejected in most cases. But when it cannot be rejected, then we have something. The Diegueno ceremonial piece suggests a shred of ethnographic behavior of use to archaeologists. I consider it to be a worthwhile object lesson.

Continuous flow non-thermal plasma reactors are being investigated for their ability to efficiently produce high quality nanoparticles. While many nanomaterials can be produced via continuous flow non-thermal plasma reactors, silicon is of particular interest, due to its abundance and relevance in many energy related fields. Significant gaps still exist in the understanding of the kinetics responsible for particle growth, structural evolution, and surface termination of continuous flow non-thermal plasma reactor produced particles. Particle interaction with plasma radicals results in the heating of the particles, which in turn affects the kinetics of particle growth, structural evolution, and surface termination during synthesis and processing. We have investigated the details of plasma-nanoparticle interaction by using in-flight and in-situ characterization techniques. For the first time, we have measured the temperature of a free-standing particle immersed in a non-equilibrium processing plasma.

In parallel, we have utilized continuous flow non-thermal plasma reactor-produced nanoparticles to create bulk nanostructured materials. The ability to tune size, structure, and surface termination of the continuous flow non-thermal plasma reactor produced nanoparticles allows for significant control of the precursor powders used in the densification processes. Hot pressing processes allow for the production of samples with bulk-like densities while limiting grain growth, allowing for the creation of nanostructured bulk systems. Nanostructured bulk silicon represents an ideal system to study the role of nano-structuring on transport of charge carriers and phonons in bulk materials. Initial results show that small particle and narrow particle size distributions allows for the creation of bulk nanostructured silicon with high ZT values. This system has shown to be relevant for direct conversion of heat into electrical power, but is also a model for the optimization of phonon and charge carrier transport in similar material systems.