Top Quark Physics Results from CDF and D0

I summarize recent top quark physics results from the Fermilab Tevatron experiments. Since the observation of the top quark by CDF and D0 in 1995, the experimental focus has shifted to a detailed study of the top quark's properties. This article describes recent measurements of the top quark production cross section, mass, kinematic properties, branching ratios, $V_{tb}$, and the W polarization in top decays.Comment: 12 pages, LaTex, uses snow2e.cls (available from ftp://preprint.slac.stanford.edu/groups/techpubs/snowmass/latex2e-v1.2/) To appear in the proceedings of Snowmass '9

Using “shares” vs. “log of shares” in fixed-effect estimations

This paper looks at potential implications emerging from including “shares” as a control variable in fixed effect estimations. By shares we refer to the ratio of a sum of units over another, such as the share of immigrants in a city or school. As will be shown in this paper, a logarithmic transformation of shares has methodological merits compared to the use of shares defined as mere ratios.Scale dependency, consistency; spurious significance.

Benthic community productivity in the Magellan region and in the Weddell Sea

Our comparison of macrobenthic biomass, production and productivity of the Magellan region (14 - 349 m water depth) and the Weddell Sea (132 - 548 m water depth) is based on multi box corer samples collected in both areas. Biomass is slightly but not significantly lower in the Magellan region (7.3 g C m-2) than in the Weddell Sea (12.0 g C m-2). Annual production and P/B ratio are higher in the Magellan region (5.1 g C m-2 y-1, 0.7 y-1) as compared to the Weddell Sea (3.6 g C m-2 y-1, 0.3 y-1). In the Magellan region, Mollusca, Polychaeta and Arthropoda dominate benthic production, whereas in the Weddell Sea Polychaeta, Porifera and Echinodermata are the most productive taxa

Recent payment trends in the United States

Payment systems

The design, development, testing, fabrication, calibration and integration of a High Resolution Imager (HRI) for the Roentgen Satellite (ROSAT)

The development, calibration and integration of the high resolution imager (HRI) for the Roentgen Satellite (ROSAT) is discussed