Search for Gravitational Waves from Primordial Black Hole Binary Coalescences in the Galactic Halo

We use data from the second science run of the LIGO gravitational-wave detectors to search for the gravitational waves from primordial black hole (PBH) binary coalescence with component masses in the range 0.2--$1.0 M_\odot$. The analysis requires a signal to be found in the data from both LIGO observatories, according to a set of coincidence criteria. No inspiral signals were found. Assuming a spherical halo with core radius 5 kpc extending to 50 kpc containing non-spinning black holes with masses in the range 0.2--$1.0 M_\odot$, we place an observational upper limit on the rate of PBH coalescence of 63 per year per Milky Way halo (MWH) with 90% confidence.Comment: 7 pages, 4 figures, to be submitted to Phys. Rev.

To be the best, a study of excellence in the U.S. Marine Corps Infantry Battalions

A Study of Excellence in United States Marine Corps Infantry Battalions is a study conducted to test the hypothesis that common attributes are shared by excellent battalions. Interviews were conducted with thirty-one senior infantry officers from various stateside commands, from which it was concluded that excellent battalions do possess a common set of attributes that account for their superior performance. To further develop this narrative model of excellence, and present a clearer picture of how an excellent battalion operates, interviews were subsequently conducted with staff noncommissioned officers, noncommissioned officers, and junior enlisted men from various infantry units. Attributes dealing with balanced excellence, leadership, emphasis on goals, culture and values, and the environment of excellence are discussed in detail.http://archive.org/details/tobebeststudyofe1094530407Approved for public release; distribution is unlimited

Shared phylogeographic patterns and widespread chloroplast haplotype sharing in Eucalyptus species with different ecological tolerances

We examined the phylogeography of three south-east Australian trees (Eucalyptus delegatensis, Eucalyptus obliqua, and Eucalyptus regnans) with different tolerances, in terms of cold, drought, fire and soil to explore whether species with different ecologies share major phylogeographic patterns. A second aim of this study was to examine geographic patterns of chloroplast DNA (cpDNA) haplotype sharing among the three study species. Trees of E. delegatensis (n = 120), E. obliqua (n = 265) and E. regnans (n = 270) were genotyped with five cpDNA microsatellite markers. The species shared major phylogeographic disjunctions, and common patterns at proposed glacial refugia (generally high haplotype diversity) and areas thought to have been treeless during the Last Glacial Maximum (LGM) (low diversity). Inter-specific sharing of haplotypes was extensive, and fixation of shared, regional haplotypes was more frequent in areas postulated as having been treeless at the LGM. Despite ecological differences, chloroplast microsatellite data suggest the three species have responded to past climatic changes in a similar way, by persisting in multiple, generally common refugia. We suggest that the natural ability of eucalypt species to hybridise with others with quite different or broader ecological tolerances may provide an "insurance policy" for response to rapidly changing abiotic conditions