Digital Commons Network^™

Experimental Analysis Of Propeller Interactions With A Flexible Wing Micro-Air-Vehicle, Brian J. Gamble

Theses and Dissertations

An investigation into the effects of the propeller slipstream on a flexible wing micro-air-vehicle (MAV) was conducted. The Air Force Research Lab, Munitions Directorate designed a man-portable MAV with a 24 in. wingspan and 6 in. root chord to be used for battle damage assessment and reconnaissance. Two wings have been developed for this MAV. One is a rigid carbon-fiber wing and the other consists of flexible parachute material attached to a carbon-fiber skeleton. Experimental methods were implemented to investigate propeller and wing interactions, characterizing torque and thrust requirements on the motor along with aerodynamic forces on the aircraft as …

Classification Characteristics Of Carbon Nanotube Polymer Composite Chemical Vapor Detectors, Huynh A. Hinshaw

Theses and Dissertations

The first step in combating a chemical weapons threat is contamination avoidance. This is accomplished by the detection and identification of chemical agents. The Air Force has several instruments to detect chemical vapors, but is always looking for lighter, faster, and more accurate technology for a better capability. This research is focused on using carbon nanotube polymer composite sensors for chemical detection. More specifically, models are developed to classify three sets of sensor data according to vapor using various multivariate techniques. Also, prediction models of a mixed sensor output are developed using neural networks and regression analysis. The classifiers developed …

A Monocular Vision Based Approach To Flocking, Brian Kirchner

Theses and Dissertations

Flocking is seen in nature as a means for self protection, more efficient foraging, and other search behaviors. Although much research has been done regarding the application of this principle to autonomous vehicles, the majority of the research has relied on GPS information, broadcast communication, an omniscient central controller, or some other form of "global" knowledge. This approach, while effective, has serious drawbacks, especially regarding stealth, reliability, and biological grounding. This research effort uses three Pioneer P2-AT8 robots to achieve flocking behavior without the use of global knowledge. The sensory inputs are limited to two cameras, offset such that the …

An Epidemiological Approach To Terrorism, Kjirstin A. Bentson

Theses and Dissertations

There are many types of models for counterterrorism, explaining different problems that the military faces in the fight against terrorism. This thesis proposes that one of the fundamental assumptions underlying existing models of counterterrorism is that the struggle with terrorists can be understood as a war in the traditional sense of the term. We propose to rethink the struggle against terrorism as a fight against an infection. The epidemic of terrorist ideology within part of the world is a result, from this perspective, of the infectiousness of that ideology. Using the insights of the field of the epidemiology of ideas, …

Afmc Civilian Retention: Forecasting Policy On The Future Of The Civilian Workforce, Dex Y. Landreth

Theses and Dissertations

The Department of Defense's (DoD) achievement of its mission is dependent in large part on the skills and expertise of its civilian workforce. DoD's civilian workforce develops policy, provides intelligence, manages finances, and acquires and maintains weapon systems, to name a few areas of work. During its downsizing in the early 1990s, DoD did not focus on reshaping the civilian workforce in a strategic manner. This resulted in a workforce characterized by a growing gap between older, experienced employees and younger, less experienced ones. With more than 60 percent of its civilian personnel becoming eligible to retire by 2010, DoD …

Lsuhsc Facilities Biweekly Update: March 2006, Lsuhsc Property And Facilities Management

LSUHSC Facilities Biweekly Updates: 2006

LSUHSC Facilities Biweekly Updates from March 11 and 28, 2006.

These updates describe damage and a timeline of repairs at the LSU Health Sciences Center - New Orleans campus due to Hurricane Katrina which made landfall August 29, 2005.

Conservation Of The Pho Regulon In Pseudomonas Fluorescens Pf0-1, Russell D. Monds, Peter D. Newell, Julia A. Schwartzman, George A. O'Toole

Dartmouth Scholarship

The Pho regulon integrates the sensing of environmental inorganic phosphate (Pi) availability with coregulation of gene expression, mediating an adaptive response to Pi limitation. Many aspects of the Pho regulon have been addressed in studies of Escherichia coli; however, it is unclear how transferable this knowledge is to other bacterial systems. Here, we report work to discern the conservation of the Pho regulon in Pseudomonas fluorescens Pf0-1. We demonstrate by mutational studies that PhoB/PhoR and the Pst system have conserved functions in the regulation of Pi-induced phosphatase activities, as well as expression of other Pi-regulated genes. A genetic screen was …

Bacteriophage Migration Via Nematode Vectors: Host-Parasite-Consumer Interactions In Laboratory Microcosms, John J. Dennehy, Nicholas A. Friedenberg, Yul W. Yang, Paul E. Turner

Dartmouth Scholarship

Pathogens vectored by nematodes pose serious agricultural, economic, and health threats; however, little is known of the ecological and evolutionary aspects of pathogen transmission by nematodes. Here we describe a novel model system with two trophic levels, bacteriophages and nematodes, each of which competes for bacteria. We demonstrate for the first time that nematodes are capable of transmitting phages between spatially distinct patches of bacteria. This model system has considerable advantages, including the ease of maintenance and manipulation at the laboratory bench, the ability to observe many generations in short periods, and the capacity to freeze evolved strains for later …

Effects Of Predator Removal On Upland Nesting Ducks In North Dakota Grassland Fragments, Kristen D. Chodachek, Michael J. Chamberlain

The Prairie Naturalist

Low nest success rates in the Prairie Pothole Region are attributed mainly to changes in the predator community coupled with reductions in availability of suitable nesting cover. We evaluated effects of removal of mammalian predators on pair density and nest success of ducks nesting on 259 ha sites in northeastern North Dakota during 2001 and 2002. We monitored pair density and duck nests on 10 sites with removal and 10 sites without removal. Overall nest success for both years was greater on trapped (53.4%) than nontrapped sites (28.7%). Pair densities were not affected by predator removal, but did increase across …

Federal Wetland Jurisdiction And The Power To Regulate Commerce: Searching For The Nexus In Gerke Excavating, Joshua L. Lee

BYU Law Review

No abstract provided.

Monsanto And The Requirement For Real Risks In Gm Food Regulation, Ruby R. Fernandez

Loyola of Los Angeles International and Comparative Law Review

No abstract provided.

Journal Of Sociology & Social Welfare Vol. 33, No. 1 (March 2006)

The Journal of Sociology & Social Welfare

TABLE OF CONTENTS

• SPECIAL ISSUE ON COPING WITH POVERTY THE EARNED INCOME TAX CREDIT: A STUDY OF ELIGIBLE PARTICIPANTS VS. NON-PARTICIPANTS - Richard K. Caputo
• WHEN POLICY MEETS PRACTICE: THE UNTESTED EFFECTS OF WELFARE REFORM - Amy D'Andrade and Jill Duerr Berrick
• FINANCIAL KNOWLEDGE OF THE LOW-INCOME POPULATION: EFFECTS OF A FINANCIAL EDUCATION PROGRAM - Min Zhan, Steven G. Anderson, and Jeff Scott
• PATIENT INSURANCE STATUS AND DO-NOTRESUSCITATE ORDERS: SURVIVAL OF THE RICHEST? - Gigi Nordquist
• THE SOCIAL AND ECONOMIC IMPACT OF SANCTIONS AND TIME LIMITS ON RECIPIENTS OF TEMPORARY ASSISTANCE TO NEEDY FAMILIES - Taryn Lindhorst and Ronald J. …

The Severely-Distressed African American Family In The Crack Era: Empowerment Is Not Enough, Eloise Dunlap, Andrew Golub, Bruce D. Johnson

The Journal of Sociology & Social Welfare

Numerous African American families have struggled for generations with persistent poverty, especially in the inner city. These conditions were further strained during the 1980s and 1990s by the widespread use of crack cocaine. For many, crack use became an obsession, dominated their lives, and superseded family responsibilities. This behavior placed additional pressure on already stressed kin support networks. This paper explores the processes prevailing in two households during this period. In the 2000s, children born to members of the Crack Generation are avoiding use of crack but face major deficits from their difficult childhoods. This presents both challenges and opportunities. …

The Sequential Costs Of Poverty: What Traditional Measures Overlook, Elizabeth A. Segal, Laura R. Peck

The Journal of Sociology & Social Welfare

This research note proposes an addition to the poverty measurement debate. Motivated by dissatisfaction with the official poverty measure, which many scholars and practitioners share, we propose the use of sequential costs of poverty to enrich the poverty measure so that it might capture more closely the life-experiences of low-income families. After presenting some background on poverty measurement, this research note explores the conceptual framework that surrounds the notion of sequential costs. Drawing on our past research, we propose ways in which these sequential costs surface, with illustrative examples from health, employment, housing, and income maintenance.

Review Of The Politics Of Multiracialism: Challenging Racial Thinking. Heather M. Dalmage (Ed.). Reviewed By Wilma Peebles-Wilkins., Wilma Peebles-Wilkins

The Journal of Sociology & Social Welfare

Book review of Heather M. Dalmage (Ed.), The Politics of Multiracialism: Challenging Racial Thinking. Albany, NY.: State University of New York Press, 2004. $65.50 hardcover, $21.95 papercover.

Grazing Management For Warm-Season Grasses In Eastern South Dakota, Eric Mousel, Roger Gates, Corey Maaland

SDSU Extension Fact Sheets

No abstract provided.

Kinetic And Spectroscopic Characterization Of The E134a- And E134d-Altered Dape-Encoded N-Succinyl-L,L-Diaminopimelic Acid Desuccinylase From Haemophilus Influenzae, Ryan S. Davis, David L. Bienvenue, Sabina I. Swierczek, Danuta M. Gilner, Lakshman Rajagopal, Brian Bennett, Richard C. Holz

Physics Faculty Research and Publications

Glutamate-134 (E134) is proposed to act as the general acid/base during the hydrolysis reaction catalyzed by the dapE-encoded N-succinyl-l,l-diaminopimelic acid desuccinylase (DapE) from Haemophilus influenzae. To date, no direct evidence has been reported for the role of E134 during catalytic turnover by DapE. In order to elucidate the catalytic role of E134, altered DapE enzymes were prepared in which E134 was substituted with an alanine and an aspartate residue. The Michaelis constant (K _m) does not change upon substitution with aspartate but the rate of the reaction changes drastically in the following order: glutamate (100% …

The Ribosome-Recycling Step: Consensus Or Controversy?, Go Hirokawa, Natalia Demeshkina, Nobuhiro Iwakura, Hideko Kaji, Akira Kaji

Department of Biochemistry and Molecular Biology Faculty Papers

Ribosome recycling, the last step in translation, is now accepted as an essential process for prokaryotes. In 2005, three laboratories showed that ribosome-recycling factor (RRF) and elongation factor G (EF-G) cause dissociation of ribosomes into subunits, solving the long-standing problem of how this essential step of translation occurs. However, there remains ongoing controversy regarding the other actions of RRF and EF-G during ribosome recycling. We propose that the available data are consistent with the notion that RRF and EF-G not only split ribosomes into subunits but also participate directly in the release of deacylated tRNA and mRNA for the next …

Racial Profiling In Texas Department Of Public Safety Traffic Stops: Race Aware Or Race Benign., Steven R. Wolfson

The Scholar: St. Mary's Law Review on Race and Social Justice

It is illegal for Texas law enforcement agencies to racially profile people. However, Texas continues to deal with racial profiling among law enforcement officers. This article concerns the right to travel, unmolested by state action based upon race or ethnicity. Since passing the Fourteenth Amendment and its Equal Protection Clause, our legal system under-includes, and outright excludes, certain groups of people from its promise. Such racial disparities have lived in the United States Constitution since the authors drafted the three-fifths compromise at its inception. When considering the criminality of a group of people and the overpopulation in state prisons, many …

Queen Weights Of Polygyne Solenopsis Invicta And S. Xyloni Suggest Reduced Competitive Ability, Ricardo A. Ramirez, D C. Thompson

Biology Faculty Publications

Solenopsis invicta Buren populations were confirmed in southern New Mexico, resulting in a quarantine of Doña Ana County in 1998; however, Solenopsis xyloni McCook remains the dominant fire ant. This study compared the queen weights and egg production of polygyne colonies of both species. There was no difference in live weights of the major worker caste; however, queens were very different in weight. In this study, S. invicta queens weighed almost twice as much as S. xyloni (S. invicta = 11.32 ± 0.25mg vs. S. xyloni = 6.40 ± 0.30mg) and produced over 50% as many eggs as S. xyloni. …

Strategic Communication In Crisis Governance: Singapore’S Management Of The Sars Crisis, Jin Yan, Augustine Pang, Glen T. Cameron

Research Collection Lee Kong Chian School Of Business

The contingency theory of conflict management and current crisis management literature are integrated in this paper to examine how crisis has been communi-cated and managed by the Singapore government and what kinds of strategies arose during the various stages of the SARS crisis life-cycle. Findings show that the Singapore government played a predominant role in managing how its multiple publics perceived the crisis by extensive communication through the news media. The media, in turn, playing a supporting nation-building role, assisted the government's management and communication of the crisis. To effectively manage the perception and emotion of the various public, the …

Genetical, Cytological & Biological Studies Of Chrysomya Bezziana Vill. (Diptera: Calliphoridae) Exposed To Gamma Rays: I. Effect On Adult Emergence & Sex Ratio., L. J. M. Al-Bahadlyli, A. A. R. Al-Taweel, B. M. A. Al-Azawi

Baghdad Science Journal

The results of this study showed that irradiated pupae at age of one day old was very sensitive to all doses of gamma rays, no adults emerged from pupae exposed to 30 Gy or higher doses. The highest percentage of adults emergence was recorded when pupae irradiated at either 4 or 5 days old, these were 83.7 & 83.0% respectively in comparison with the control which was 86.6%. Furthermore, the results showed that all doses of gamma rays did not effect the sex ratio.

Famous Trademarks And The Rational Basis For Protecting "Irrational Beliefs", Shahar J. Dilbary

Coase-Sandor Institute for Law & Economics Research Paper Series

This Article challenges the common wisdom about the desirability of celebrated trademarks. Contrary to the traditional view, it argues that mega-brands are neither economic evils nor is their function limited to imparting information regarding the physical product they flaunt. The Article also rejects the view that famous marks persuade consumers (often referred to as "Snobs") to "irrationally" pay more for the same physical product they could have purchased for less. Rather, it argues that in purchasing a branded good the consumer is actually purchasing three tied products in one package: a physical product, information about the physical product, and an …

Singapore's Transition To Innovation-Based Economic Growth: Infrastructure, Institutions And Government's Role, Winston T. H. Koh

Research Collection School Of Economics

Technological progress and innovation plays a central role in a country's economic progress. As an economy advances to the global technological frontier and narrows the technological gap, an innovation-based growth strategy that focuses on investments in R&D and technology creation offers the greatest potential for economic growth. In this paper, we discuss the requirements for a successful transition, in terms of changes to the technology infrastructure, economic institutions and the incentives' structure. This paper outlines the efforts made by Singapore to re-make itself as an innovation-based economy, and the challenges faced by the government in transforming the nation's infrastructure and …

Hydrographic Observations During The 2002 Ioc Contaminant Baseline Survey In The Western Pacific Ocean, C. I. Measures, Greg A. Cutter, W. M. Landing, R. T. Powell

OES Faculty Publications

The 2002 IOC Contaminant Baseline Survey in the western Pacific Ocean was the fourth in a series of cruises intended to establish the contemporary concentrations of trace elements and other materials in the major water masses of the ocean and to illuminate the pathways by which materials delivered to the surface ocean are incorporated in the subsurface waters. The expedition occupied 9 vertical profile stations encompassing the subtropical and subarctic gyre of the western North Pacific. In addition, underway surface water samples were collected during transits between the stations. This paper uses the temperature, salinity, nutrient, oxygen, and chlorophyll data …

Family, Community, And School Influences On Resilience Among American Indian Adolescents In The Upper Midwest, Teresa D. Lafromboise, Dan R. Hoyt, Lisa Oliver, Les B. Whitbeck

Department of Sociology: Faculty Publications

This study examines resilience among a sample of American Indian adolescents living on or near reservations in the upper Midwest. Data are from a baseline survey of 212 youth (115 boys and 97 girls) who were enrolled in the fifth through eighth grades. Based upon the definition of resilience, latent class analyses were conducted to identify youth who displayed prosocial outcomes (60.5%) as opposed to problem behavior outcomes. A measure of family adversity was also developed that indicated only 38.4% of the youth lived in low-adversity households. Defining resilience in the context of positive outcomes in the face of adversity, …

First Amendment Protection Of Teacher Instructional Speech, Walter E. Kuhn

Duke Law Journal

No abstract provided.

Understanding Sexual Abstinence In African American Teens, Kristin Haglund

College of Nursing Faculty Research and Publications

Purpose: To explore the perspectives of teenage girls on how life contexts influenced sexuality and sexual abstinence.

Study Design and Methods: A qualitative descriptive study with a convenience sample of 14 sexually abstinent African American adolescent females who were interviewed to obtain their life histories. Narrative analysis was used to identify unique and common experiences and to develop themes.

Results: For these participants, being abstinent was a way to demonstrate their emerging identities as adult women. They described themselves as faithful, unique persons who defied negative stereotypes, avoided risky situations, wanted to be strong women like their …

Ischemia Reperfusion Dysfunction Changes Model-Estimated Kinetics Of Myofilament Interaction Due To Inotropic Drugs In Isolated Hearts, Samhita S. Rhodes, Amadou Ks Camara, Kristina M. Ropella, Said H. Audi, Matthias L. Riess, Paul S. Pagel, David F. Stowe

Biomedical Engineering Faculty Research and Publications

Background

The phase-space relationship between simultaneously measured myoplasmic [Ca²⁺] and isovolumetric left ventricular pressure (LVP) in guinea pig intact hearts is altered by ischemic and inotropic interventions. Our objective was to mathematically model this phase-space relationship between [Ca²⁺] and LVP with a focus on the changes in cross-bridge kinetics and myofilament Ca²⁺ sensitivity responsible for alterations in Ca²⁺-contraction coupling due to inotropic drugs in the presence and absence of ischemia reperfusion (IR) injury.

Methods

We used a four state computational model to predict LVP using experimentally measured, averaged myoplasmic [Ca²⁺] transients …

Introduction: New British Feminist Scholarship And Contemporary Politics, Kristin Aune, Celia Roberts

Journal of International Women's Studies

No abstract provided.