Precession during merger 1: Strong polarization changes are observationally accessible features of strong-field gravity during binary black hole merger

The short gravitational wave signal from the merger of compact binaries encodes a surprising amount of information about the strong-field dynamics of merger into frequencies accessible to ground-based interferometers. In this paper we describe a previously-unknown "precession" of the peak emission direction with time, both before and after the merger, about the total angular momentum direction. We demonstrate the gravitational wave polarization encodes the orientation of this direction to the line of sight. We argue the effects of polarization can be estimated nonparametrically, directly from the gravitational wave signal as seen along one line of sight, as a slowly-varying feature on top of a rapidly-varying carrier. After merger, our results can be interpreted as a coherent excitation of quasinormal modes of different angular orders, a superposition which naturally "precesses" and modulates the line-of-sight amplitude. Recent analytic calculations have arrived at a similar geometric interpretation. We suspect the line-of-sight polarization content will be a convenient observable with which to define new high-precision tests of general relativity using gravitational waves. Additionally, as the nonlinear merger process seeds the initial coherent perturbation, we speculate the amplitude of this effect provides a new probe of the strong-field dynamics during merger. To demonstrate the ubiquity of the effects we describe, we summarize the post-merger evolution of 104 generic precessing binary mergers. Finally, we provide estimates for the detectable impacts of precession on the waveforms from high-mass sources. These expressions may identify new precessing binary parameters whose waveforms are dissimilar from the existing sample.Comment: 11 figures; v2 includes response to referee suggestion

Shining LUX on Isospin-Violating Dark Matter Beyond Leading Order

Isospin-violating dark matter (IVDM) has been proposed as a viable scenario to reconcile conflicting positive and null results from direct detection dark matter experiments. We show that the lowest-order dark matter-nucleus scattering rate can receive large and nucleus-dependent corrections at next-to-leading order (NLO) in the chiral expansion. The size of these corrections depends on the specific couplings of dark matter to quark flavors and gluons. In general the full NLO dark-matter-nucleus cross-section is not adequately described by just the zero-energy proton and neutron couplings. These statements are concretely illustrated in a scenario where the dark matter couples to quarks through scalar operators. We find the canonical IVDM scenario can reconcile the null XENON and LUX results and the recent CDMS-Si findings provided its couplings to second and third generation quarks either lie on a special line or are suppressed. Equally good fits with new values of the neutron-to-proton coupling ratio are found in the presence of nonzero heavy quark couplings. CDMS-Si remains in tension with LUX and XENON10/100 but is not excluded.Comment: 11 pages, 5 figure

The Law, the Lawyers, and the Writers

The great writers have one thing in common-they castigate the human race, including themselves, the frailties of mankind, and his noble institutions. Law and the lawyers have suffered at the hands of the writers. The doctors have suffered even more. Most rulers, if they lived long enough, have been the subject of satire, caricatures, exposure, or castigation. The church and churchmen have also suffered. The principal subject matter of satire over the centuries has been the Church. ... Because of this general emphasis on soiled humanity, the legal profession need not feel alone as it finds itself the subject matter of the great writers over many centuries

Case-Specific Counterterrorism Policies for Islamic Fundamentalist Groups

Since 9/11, counterterrorism policies have been one of the crucial policy issues facing the United States. After the attacks on the United States, counterterrorism in this country transformed. Fifteen years later, counterterrorism is typically organized as a one-size fits all approach. This approach generalizes all terrorist threats, trying to target terrorism as a whole. This thesis explains how this is an improper approach to counterterrorism. Instead, policies should be case-specific and created in regards to the specific characteristics embodied by each terrorist organization. These characteristics include history and ideology, organizational and leadership structure, finances, and tactics and targets. These characteristics have been proven to comprise the composition of a one-of-a-kind terrorist organization. Each group expresses these characteristics differently, even if they share the same geographical location or religious background. Through research utilizing academic journal articles, current events, government publications, and published books, it is discovered how the unique characteristics displayed by Islamic Fundamentalist groups have counterterrorism policy implications. In order to portray this, this thesis analyzed characteristics of Al Qaeda, ISIS, and the Taliban. Through these case-studies, it was shown how distinct these groups are from one another and how these differences should be accounted for in counterterrorism policies. Once these differences are implemented into individualist counterterrorism policies, the United States can provide effective policies that target specific aspects of each terrorist organization instead of trying to combat terrorism as a whole

Notes From the York County Star, December 28, 1866

A handwritten set of notes from the York County Star, transcribed by Alfred L. Shoemaker, originally dated December 28, 1866. Within, the article details the gathering of a large group of costumed Bellsnickles as they visited various houses in the region.https://digitalcommons.ursinus.edu/shoemaker_documents/1206/thumbnail.jp

The application of local and traditional knowledge for disaster mitigation in flood-prone areas of rural Thailand

Master's Project (M.A.) University of Alaska Fairbanks, 2016This project focuses around the development of a workshop on disaster preparedness and response for a village in rural Thailand. The workshop goals were concentrated around the investigation of solutions to alleviate or lessen the vulnerability of the village toward reoccurring flood events. The objectives were completed through inclusion of stakeholders and outside experts and focused on bringing a conversation to community leaders in regard to their implementation of pre- and post-disaster strategies. The primary audience for this research project is those working within rural communities that are prone to annual or frequent natural disasters. The tools and knowledge gained herein will be able to provide individual and community response and preparedness strategies to improve resiliency and decrease vulnerability

Chemical fractionation of siderophile elements in impactites from Australian meteorite craters

The abundance pattern of siderophile elements in terrestrial and lunar impact melt rocks was used extensively to infer the nature of the impacting projectiles. An implicit assumption made is that the siderophile abundance ratios of the projectiles are approximately preserved during mixing of the projectile constituents with the impact melts. As this mixture occurs during flow of strongly shocked materials at high temperatures, however there are grounds for suspecting that the underlying assumption is not always valid. In particular, fractionation of the melted and partly vaporized material of the projectile might be expected because of differences in volatility, solubility in silicate melts, and other characteristics of the constituent elements. Impactites from craters with associated meteorites offer special opportunities to test the assumptions on which projectile identifications are based and to study chemical fractionation that occurred during the impact process

Studies on hepatic blood flow and the rate of Bromsulphalein clearance in dogs with portacaval transposition

Hepatic plasma and blood flows were determined in dogs with modified portacaval transposition. Mean hepatic blood flow was 43 ml. per kilogram per minute, approximately that expected in a normal dog. Similarly, the rate of Bromsulphalein clearance was in the range expected for normal dogs. © 1962