Direct J/psi and psi' Polarization and Cross Sections at the Tevatron

Transverse polarization of ${}^3 S_1$ charmonium states, produced directly in $p\bar{p}$ collisions at asymptotically large transverse momentum p_t, has emerged as the most prominent test of color octet contributions and spin symmetry in quarkonium production. We present predictions for the polar angle distribution at moderate values of p_t \sim 4 - 20 GeV, covered by the Tevatron Run I data. We update the fits of NRQCD matrix elements and discuss their theoretical uncertainties. With our best fit values, no transverse polarization is expected at p_t \sim 5 GeV, but the angular distribution is predicted to change dramatically as p_t increases to 20 GeV.Comment: 11 pages, LaTeX, 3 figures included via epsf.st

SUSY Particle Production at the Tevatron

The calculation of the next-to-leading order SUSY-QCD corrections to the production of squarks, gluinos and gauginos at the Tevatron is reviewed. The NLO corrections stabilize the theoretical predictions of the various production cross sections significantly and lead to sizeable enhancements of the most relevant cross sections for scales near the average mass of the produced massive particles. We discuss the phenomenological consequences of the results on present and future experimental analyses.Comment: 13 pages, latex, 9 figures, further extended versio

Mollusca of the Illinois River, Arkansas

The Illinois River is in the Ozark region of northwestern Arkansas and eastern Oklahoma. A survey of the Illinois River in Arkansas produced nine species and one morphological subspecies of gastropods, three species of sphaeriid clams, and 23 species of unionid mussels. Museum records resulted in another two species and an ecophenotype of the Unionidae. This represents the first published survey of molluscan species from the Illinois River in Arkansas

Using Similar Form Characters as an Aid to Character Recognition in Chinese

7 pagesSince Chinese characters are composed of a relatively small number of basic strokes and components, and since these units are spatially arranged within characters in a limited number of ways, many Chinese characters are similar in their overall graphic form. These Similar Form Characters can cause confusion for students learning the Chinese written language. In order to help students better identify and recognize Chinese characters, a booklet was developed in which commonly occurring Similar Form Characters are presented and contrasted, so as to point out their areas of similarity as well as their distinctive features