Using fibreoptic laryngoscopy to observe pharyngeal articulations, the aryepiglottic sphincter mechanism i s shown to be responsible for the production of speech sounds in the phonetic category "pharyngeal." Major differences in auditory/acoustic quality are also produced when the larynx as a whole is raised or lowered during the production of pharyngeals. The voiceless pharyngeal fricative and...

It has been recently shown that the quantum Boltzmann equations may be relevant for the leptogenesis scenario. In particular, they lead to a timedependent CP asymmetry which depends upon the previous dynamics of the system. This memory effect in the CP asymmetry is particularly important in resonant leptogenesis where the asymmetry is generated by the decays of nearly mass-degenerate right-hand...

* Substantially revised from a presentation at the Fourth International Conference on Competence-Based Management, Oslo, Norway, June 18–21, 1998, “Can Strategy be Better than Acupuncture: A Realist/Semantic Conception of Competence-Based Research.” I wish to give special thanks to Shelby Hunt and other conference participants for comments on the earlier version. I also need to recognize the ma...

I would like to thank my advisor, Gerard Cornuéjols, for his support and his precious guidance. I also want to express my gratitude towards Michele Conforti, who introduced me to the field of combinatorics when I has an undergraduate student in Padova, and encouraged me to continue. Several parts of this dissertation resulted from working jointly with Michele Con-forti, Gerard Cornuéjols, and K...

Signaling theory provides the framework to address three main research questions: (1) How accurately do consumers notice and recollect TPA seals on retail Web sites? (2) How familiar are consumers with major TPA seals? and (3) How accurately do consumers understand the assurances represented by the TPA seals? Results of this study of three major TPA seals (TRUSTe, BBBOnLine Reliability, and Ver...

The eigenvalues of a symmetric matrix depend on the matrix nons-moothly. This paper describes the nonsmooth analysis of these eigen-values. In particular, I present a simple formula for the approximate (limiting Fr echet) subdiierential of an arbitrary function of the eigen-values, subsuming earlier results on convex and Clarke subgradients. As an example I compute the subdiierential of the k't...

While official PM,,, monitoring data for South Carolina are not available, unpublished data indicate that emissions at rural sites exceed the annual PM,., concentration standard of 15 pg/m3 from April to September each year. The possibility that PM,,, standards might be exceeded near the forest-urban interface could restrict burning in the future. In contrast, PM,, concentrations seldom approac...