Gang Wars: The Failure of Enforcement Tactics

This report attempts to clarify some of the persistent misconceptions about gangs and to assess the successes and failures of approaches that have been employed to respond to gangs. We undertook an extensive review of the research literature on gangs because we believe that the costs of uninformed policy making -- including thousands of lives lost to violence or imprisonment -- are simply too high

Disparity by Design: How Drug-free Zone Laws Impact Racial Disparity -- and Fail to Protect Youth

Thanks to the work of concerned policymakers and reform advocates across the country, public discussions have been sparked in many states about the fairness and efficacy of drug-free zone laws. This report is designed to inform those discussions by reviewing empirical findings, primarily from three states -- Massachusetts, New Jersey, and Connecticut -- where enough information is available to answer key questions. The report also documents efforts by policymakers and advocates in a few other states -- Illinois, Utah, and Washington -- to challenge long-held assumptions that drug-free zone laws are protecting children and enhancing public safety

Theoretical Modeling of Linear Absorption Coefficients in Si/Si1-xGex Multiple Quantum Well Photodetectors

Si/Si1-xGex MQW Infrared Photodetectors offer the promise of normal incidence photodetection tunable over the range of 3-12 micrometers wavelength range at temperatures above 40 K. This system is attractive because the Si1-xGex offers greater compatibility with existing Si based signal processing circuitry. Band structures, momentum matrix elements and linear absorption coefficients are computed using a Luftinger-Kohn k/p analysis for Si/Si1-xGex quantum wells grown in the 110 direction. The absorption coefficient as a function of energy and wavelength is calculated by two methods: a delta function fit to intersubband transitions, and a Lorentzian fit to intersubband transitions. Calculations were performed for parallel as well as normally incident radiation and the resulting absorption spectra are in good agreement with experimental observations

Electron Paramagnetic Resonance Spectroscopy and Hall Effect Studies of the Effects of Low Energy Electron Energy on Gallium Nitride (GAN)

The nature of native donors in GaN, types and interactions of radiation-induced defects, and damage creation coefficients for 1.0 MeV electron irradiation have been ascertained by the concerted application of electron paramagnetic resonance spectroscopy and Hall effect measurements to virgin and electron-irradiated GaN epilayers. Samples produced via molecular beam epitaxy and hydride vapor phase epitaxy, both silicon doped and nominally undoped, were subjected to Van de Graff generator produced monoenergtic electron beams with total fluences of 1016- 1018 electrons/cm2. Nitrogen vacancies are rejected as a possible cause of n-type conductivity in nominally undoped GaN due to the decrease of shallow donor populations following irradiation. Damage constants for a donor-defect complex formation or defect compensation are found to be approximately 0.15 cm-1. Identification by resolved hyperfine splitting is accomplished for radiation-induced Ga interstitial complexes

Evaluation of the continued use of an aging variable stability system augmented aircraft for modern flying qualities education

The University of Tennessee Space Institute (UTSI) obtained two fly-by-wire variable stability aircraft from Princeton University in 1991. These modified Navion aircraft contain several modifications to accommodate a response-feedback type of Variable Stability System (VSS). The aircraft were used extensively while owned and operated by Princeton for research projects for the United States Navy and Federal Aviation Administration. In recent years, externally funded research opportunities have been limited and UTSI has utilized the aircraft in support of the University graduate school curriculum. The purpose of this thesis is to evaluate the continued use of these aging variable stability system augmented aircraft for a modem, flying quality curriculum. In order to determine the capabilities of the Navion Variable Stability aircraft as an in-flight simulator and teaching tool, the longitudinal equations of motion and on board Variable Stability System were modeled in the United States Naval Test Pilot School simulation laboratory using Matrix Laboratory (MATLAB) and SIMULINK modeling tools. Characteristic responses of the short period mode of motion were plotted while varying several modeled, in-flight programmable potentiometer settings. Root locus plots were then created to determine the envelope of possible responses for in-flight demonstrations. The flaps and throttle channels were modeled but were not exercised for this evaluation. Analysis of the root locus plot revealed that the Navion is capable of demonstrating a wide range of longitudinal short period characteristics, including unstable conditions. Though this was a limited study, focusing on only the longitudinal short period modes of motion, the aging Navion VSS aircraft shows excellent potential to perform as an in-flight laboratory and demonstration platform in a modem flying qualities curriculum. Additionally, research and development agencies continue to utilize variable stability aircraft for flight control system development. This aircraft possesses great potential for utilization in the professional aerospace industry and should be maintained for use in both educational and research flight activities

Senior Recital: Kevin Green

Kemp Recital HallOctober 25, 2015Sunday Morning10:30 a.m

Thieves in the Temple: The Scandal of Copyright Registration and African- American Artists

Copyright registration is the currency of copyright transactions in music, film, and television and is essential for pursuing infringement claims and ownership disputes. Despite copyright registration’s outsized reach across the copyright spectrum and importance to the copyright industries, the U.S. Copyright Office does not verify claims of copyright authorship or ownership. No express mechanism exists to challenge false copyright registrations in the Copyright Office, and the penalties for falsely claiming copyright authorship are paltry in comparison to the potential gains. This Article contends that lax copyright registration standards call into question the legitimacy of the registration system and that the shortcomings of the current system are nowhere more salient than in the experience of African-American music artists, from Barrett Strong and Little Richard to Lil Wayne. The copyright disenfranchisement of Black artists wrought by copyright registration validates my contention that copyright formalities like registrations and copyright terminations will always tend to fall heaviest on Black creators. As it stands, there is little reason to believe that in connection with Black legacy artists and hip-hop artists the records of the Copyright Office are accurate or complete. These insights suggest that reform is needed to both police registrations on the front end and increase deterrence of false claims with enforcement mechanisms and penalties on the back end