Pseudacris brimleyi

Number of Pages: 2Integrative BiologyGeological Science

Pseudacris brachyphona

Number of Pages: 2Integrative BiologyGeological Science

Flexible foam erectable space structures Patent

Self-erectable space structures of flexible foam for application in planetary orbit

The spherical collapse model in a universe with cosmological constant

We generalize the spherical collapse model for the formation of dark matter halos to apply in a universe with arbitrary positive cosmological constant. We calculate the critical condition for collapse of an overdense region and give exact values of the characteristic densities and redshifts of its evolution.Comment: 6 pages, 3 figures, contribution to the proceedings of the 3rd International Workshop on the Identification of Dark Matter (IDM2000) in York, in pres

Glass Ceilings & Leaky Pipelines: Gender Disparity in the Casino Industry

While women account for over half the hospitality workforce there is a gap in leadership positions. This study evaluates 10,950 management positions in 972 United States commercial and Native American casinos, as of December 2016. The results show women hold 35.5% of manager and above positions. Women lead in departments such as human resources, public relations, and sales and events, but lag in casino operations management. This demonstrates horizontal occupational segregation. The results also indicate women represent 46.7% of managers, but significantly less of executive leadership. Women held only 19.4% of owner, president, and chief positions. This suggests vertical occupational segregation or a potential glass ceiling. Gaps in vertical leadership occur across individual departments as well

Correlation Statistics of Irregular and Spiral Galaxies Mapped in HI

Several measures of galaxy size and mass obtained from the neutral hydrogen mapping of 70 dwarf irregular galaxies presented in Paper I (Hoffman et al. 1996) are compared statistically to those for the set of all available HI-mapped dwarfs and HI-mapped spirals distributed within the same spatial volume to investigate variations in Tully-Fisher relations and in surface densities as functions of galaxy size and luminosity or mass. Some ambiguities due to the ``non-commutativity'' of the correlations among the variables are addressed and linear regressions of logarithms of blue luminosity, HI and optical radii, velocity profile half-width incorporating rotation and random motions, HI mass, and indicative dynamical mass are presented and analyzed. The surface density of HI is almost constant along the sequence of size/mass/luminosity while surface density of blue luminosity increases with galaxy size. For quantities not involving HI we find no evidence for a ``break'' between dwarfs and spirals, but we do find some curvature in velocity vs. radius and in the Tully-Fisher relation. There is an indication for a difference in the correlations involving HI mass or radius between dwarfs alone and spirals alone, in the sense that irregulars have somewhat more HI mass or slightly larger HI radii than spirals at a given blue luminosity, optical radius, or velocity profile width.Comment: AASTeX, to appear in ApJ, 26 pages + 3 tables + 12 figure