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Vital Tooth Whitening: Effects On Tooth Color Satisfaction, Beliefs About Dentofacial Appearance, And Self-Esteem In Older Adults, Kelly Marie Seeber

Dental Hygiene Theses & Dissertations

The purpose of this study was to explore the effects of vital tooth whitening on tooth color satisfaction, beliefs about dentofacial appearance, and self-esteem in a population 50 years of age and older. A two-group, randomized, pre-test, post-test, single-blind design was utilized following !RB-approval. Sixty-two participants were enrolled. Fifty-three participants (N=53) completed the study with no adverse events reported. Both the control and experimental groups received instructions for a threeweek oral self-care regimen, a toothbrush, toothpaste, and floss. The experimental group also received a tooth whitening product (independent variable) to be used during the same three-week period. Dependent variable measures …

Exchange Hydrodynamics Between A Subestuary And Its Adjacent Estuary, Diego A. Narváez

OES Theses and Dissertations

Four oceanographic surveys and two periods of moored data were analyzed to describe the subtidal exchange hydrodynamics between a subestuary (Nansemond River) and its adjacent estuary (James River) in the lower Chesapeake Bay. The surveys were carried out during two semidiurnal periods (~25 hrs), which included two spring and two neap tides. Velocity profiles and hydrographic data were recorded over an area ~4 km long and ~1 km wide allowing a spatial resolution rarely obtained with observational data. The results obtained in the surveys were extended with instruments deployed at the entrance to the subestuary during winter and summer time …

Fault Modeling In Wireless Sensor Networks, Ahmed A. Elmiligui

Electrical & Computer Engineering Theses & Dissertations

A large amount of research has been done in the area of wireless sensor networks (WSN), but not much work has been done in modeling the fault tolerance and reliability of these networks. In this thesis, the fault tolerance of a WSN to node failures is studied and an analytical reliability model of the network is derived. A valid reliability model of a network could reveal an estimate of the network's performance before it is deployed.

A wireless sensor network was modeled as a k-out-of-n system and a generic fault tolerant framework for the network in terms of node losses …

Fault Arrangements And Their Effect On The Performance Of Wireless Sensor Networks, Dwayne Sayone Blai

Electrical & Computer Engineering Theses & Dissertations

Wireless sensor networks face many reliability challenges. The networks are deployed in open, hostile environments, making them easily susceptible to network failure. As a result, there are countless faults that can occur in sensor networks, from component failure to outside attacks. Outside attacks take place when an adversary gains control over a node or set of nodes in the network. Outside attackers can destroy a network in numerous ways such as random attacks, clustering attacks, search-based attacks, etc. The method and strategy used in each of these attacks directly affects the network's reliability. Understanding how these adversaries are positioned is …

The Effect Of Sonification Pulse Rate And System Reliability On Perceived Workload Urgency Trust And Monitoring Performance, Randal D. Spain

Psychology Theses & Dissertations

The purpose of the current study was to examine the effect of sonification pulse rate and system reliability on subjective workload, urgency, trust, and monitoring performance of a dual task simulation of patient monitoring. Fifty-eight students performed a compensatory tracking and resource management task while simultaneously engaging in a patient monitoring task. Sonification pulse rate contained three levels (40ppm, 60ppm, 80ppm) and was manipulated within groups by varying the inter-pulse interval of the auditory signal. System reliability contained two levels (40%, 60%) and was manipulated between groups by varying the number of true and false problems presented by the sonification …

Characterization Of Β-Lactam Resistant Pandemic Serotypes Of Vibrio Cholerae Isolated From Ships' Ballast Tanks And Coastal Waters, Amanda Lynn Goodrich

OES Theses and Dissertations

Vibrio cholerae serotypes 01 and 0139 are responsible for world-wide epidemics of cholera. These pandemic causing strains must possess genes that encode for the cholera toxin (CTX) and toxin co-regulated pili (TCP) in order to infect their hosts. In this study, 284 isolates of Vibrio cholerae from ballast and coastal waters were serotyped, with 11 % testing positive for serotype 01 and 21 % testing positive for serotype 0139. PCR assays were used to detect the presence of ctxA and tcpA genes in all positive isolates, none of which contained ctxA while 2% of the isolates contained tcpA. The 01 …

An Empirical Investigation Into The Relationships Between Emotional Intelligence, Use Of Knowledge Transfer Methods, And Project Performance, Brent Michael Decker

Engineering Management & Systems Engineering Theses & Dissertations

Increasingly, the use of project teams is becoming commonplace within organizations as the primary means to accomplish complex tasks. While the literature has long acknowledged that the knowledge transfer process is a key component in achieving organizational success and ultimately sustaining a competitive advantage, very little has been written that specifically examines the knowledge transfer process at the project team level. In an attempt to increase the understanding of knowledge transfer processes at the project team level, the effect that a relatively new construct, termed emotional intelligence, has on the use of knowledge transfer methods is examined. The relationships between …

Flow Control Of Airfoil At Post-Stall Conditions By Multiple Frequency Applied Saado Jets, A. Şamil Demirsöz

Mechanical & Aerospace Engineering Theses & Dissertations

Flow separation over lifting aerodynamic components, such as airfoils and wings, occurs during stall conditions which are caused by adverse changes (i.e.; high angle of attack, inflow conditions, etc.) in the operating conditions of aerodynamic components. During stall conditions, the flow over airfoil loses its momentum, creating high pressure zones on the upper surface of the airfoil and even a small increase in pressure causes the fluid particles to stop and separate to a low pressure zone. In order to eliminate the flow separation, the low momentum flow should be removed in order to maintain the high momentum and low …

Dr. Thomas Walker's Influence On Thomas Jefferson's Lewis And Clark Expedition, Kari Kemper Tudor

History Theses & Dissertations

The greatest accomplishments of Thomas Jefferson's presidency were the purchase of the Louisiana territory, which doubled the size of the United States, and the discoveries made by the Lewis and Clark expedition. These were not just single events that sprang into being in 1803, as we learned in elementary school, but the fulfillment of a lifetime of study and effort for Jefferson. Many factors influenced Jefferson to make the decisions that culminated in these twin events.

This thesis examines the role of Doctor Thomas Walker, who was Thomas Jefferson*s guardian, neighbor, and friend, to demonstrate the influence of a lesser-known …

The Effects Of Ultrashort Pulsed Electric Fields On The Fluorescent Molecule Bodipy Fl C5 Ceramide, Rachael Sara Shevin

Electrical & Computer Engineering Theses & Dissertations

Nanosecond pulsed electric fields are able to manipulate internal cell organelles by taking advantage of the small but finite time required for charge to establish across a capacitive barrier. Pulsed electric fields also affect macromolecular structures such as enzymes and proteins. Application of a single nanosecond pulsed electric field decreases the fluorescence of a commercially available biological dye Bodipy FL C₅ Ceramide, used to observe the Golgi apparatus of living cells. The effect is seen when the fluorophore is exposed to an electric field both in vitro and when incorporated into the Golgi of a living Jurkat cell. Observation …

Reverse Decision Making And Goal Attainment A Proof Of Concept As A New Approach To The Decision Making Process Under Uncertainty, Shitalkumar S. Sabne

Engineering Management & Systems Engineering Theses & Dissertations

Decision making occurs when one must choose among alternatives. However, in uncertain environments where problems are complex and decision makers lack complete knowledge of the situation as well as decision alternatives, it's not possible for them to select an optimal decision outcome by 'Traditional Decision Approaches'. At present Reverse Decision Making is the central, although new and unproved, approach of Old Dominion University's Engineering Management and Systems Engineering research on decision making process for uncertain and complex situations. Even though research in decision making spans over one hundred years, there are still important problems which remain to be addressed.

There …

Benthic Biological Monitoring Program Of The Elizabeth River Watershed (2005), Daniel M. Dauer

Elizabeth River Reports

Executive Summary

Macrobenthic communities of the Elizabeth River watershed have been quantitatively sampled since summer 1999. This report presents the data from the seventh year of sampling in 2005. The three objectives of the Benthic Biological Monitoring Program of the Elizabeth River watershed are: (1) To characterize the health of the tidal waters of the Elizabeth River watershed as indicated by the structure of the benthic communities. (2) To conduct trend analyses on long-term data at 14 fixed-point stations to relate temporal trends in the benthic communities to changes in water and/or sediment quality. Trend analyses will be updated annually …

Review Of Dripping Dry: Literature, Politics, And Water In The Desert Southwest, By David N. Cassuto, Cory Shaman

Reconstruction: Studies in Contemporary Culture

[First paragraph]

Concentrating primarily on the environmental history of the last 100 years in the American Southwest, David N. Cassuto examines what he suggests is the nexus of political dispute regarding water in the region: the intractable tension between the ideologies of reclamation and restoration. After an initial chapter on John Wesley Powell and the 19th century origins of the hydraulic West, the book proceeds with an exploration of four representative texts in order to demonstrate what Cassuto has identified as the successive stages of the reclamation movement: "At the beginning of the twentieth century, Mary Austin believed in spite …

Writing On Water: Resources, Discourses, Reflections, Justin Scott-Coe, W. Scott Howard

Reconstruction: Studies in Contemporary Culture

[First paragraph]

We started this project in the shadow of the Great Tsunami of 2004, witnessed Katrina destroy New Orleans as submissions were coming in, and now publish during a record-breaking, nationwide—some say worldwide—heat wave. Is it any wonder the release of our journal issue on water appears as suspiciously timed as Al Gore's droning tome on global warming?

When The Well Runs Dry: An Exploration Of Water Conservation And Blue Theology, Margaret H. Ferris

Reconstruction: Studies in Contemporary Culture

Worldwide, freshwater is becoming scarce as the Earth's population increases, the effects of pollution and global warming shrink available resources, and agriculture demands rise. As theological communities offer distinctive contributions to the dialogue, theologians need to address the crisis and provide appropriate analysis and solutions from the perspective of "Blue Theology". This paper formulates such an approach, offering some of the first efforts made towards addressing the global water crisis through a theological lens. Within the Abrahamic tradition, the essay examines: how water is specifically beloved by the Divine; and the implications of God's love of water. The paper next …

The Social Nature Of Natural Resources - The Case Of Water, Jamie Linton

Reconstruction: Studies in Contemporary Culture

Of all things, water is among the most difficult to pin down. It is nevertheless characteristic of modernity that we ascribe to it an essence, on which basis particular kinds of human-water relations are made possible while others are denied. The ascription of an essential identity to water constitutes a social and political act by which it is both made known to people and made available for people. This paper explores the implications of ascribing to water an identity as "resource." Water was pronounced a resource in the United States early in the last century in the context of the …

Donors, Modellers And Development Brokers: The Pork Barrel Of Water Management Research, Julie Trottier

Reconstruction: Studies in Contemporary Culture

Donors are shaping the mainstream research agenda concerning water management around the world. As large sums are made available within applied research programmes, many actors are competing to access them. This has led to the development of a new class of actors: the water research development brokers. Development brokers have mostly been studied in the developing world. They are usually defined as local actors who master the knowledge framework of donor organizations while their social positions and local networks allow them to act as intermediaries between the local population targeted by the donor and the donor itself. Such a position …

Time And The Tsunami, Stefan Helmreich

Reconstruction: Studies in Contemporary Culture

In this article, Stefan Helmreich delivers an ethnographic report on an international academic conference of physical and biological oceanographers held in Goa, India, shortly after the Indian Ocean tsunami of December 26, 2004. Juxtaposing scientific discussions of the tsunami with novelist and anthropologist Amitav Ghosh's early 2005 visit to the hard-hit Andaman Islands, Helmreich examines various styles of narrating time in circulation in the wake of the disaster. Centering his attention on marine scientists, Helmreich discusses a tension between geological time and what he calls oscillating ocean time, a genre of time that takes in such long durée processes …

Overlooking, Rivers, Looking Over, T.S. Mcmillin

Reconstruction: Studies in Contemporary Culture

In this hybrid essay, composed of literary theory, cultural history, and fieldwork, T.S. McMillin attempts to connect the humanities to other disciplines and to connect scholarly work to the land. In the first part of the essay, he briefly develops a theory of palindromes and palindromic reflection. Palindromes connect thinking to movement and to reflection, and in turn serve as a model for experiencing texts or terrain. Occurring in music, literature, film and video art, mathematics, painting, even genetic code, palindromes underscore the complexity of the nature of things and the necessarily complex thinking that understanding the nature of things …

Review Of The Environmental Justice Reader: Politics, Poetics & Pedagogy, Edited By Mei Mei Evans Admson And Rachel Stein, Katie Ahearn

Reconstruction: Studies in Contemporary Culture

[First paragraph]

The editors of The Environmental Justice Reader: Politics, Poetics, & Pedagogy (2002) chose to include at least five scholarly essays, comprising one third of the book's content, that directly address the theme of water, thus illuminating the importance of this topic in the realms of environmental and social justice. Contributors to the anthology, ranging from urban activists to literary and anthropological scholars, address a wide variety of national and international environmental disasters from the complex vantage point of the intersection among race, politics, and class, so that the inevitable blurring of the boundaries between traditionally distinct academic disciplines …

Growing Up With Glen, Kathryn Miles

Reconstruction: Studies in Contemporary Culture

Ecologists refer to it as 'shifting baselines.' Anthropologists call it 'environmental generational amnesia.' Both refer to the slow change in the ways we respond to and define the environment. As biologists and social scientists have deftly argued, definitions of environmentalism and sustainable resource use are often based on our earliest experiences with nature. We then use these memories as the basis for our understanding of the natural world and its use. Ultimately, this creates a generational approach to issues of conservation, particularly with regards to such contentious issues as water rights and the changing face of the American West. At …

Water, Development, And State Security In South Asia: Scenarios For China And India, Ray Chandrasekara, John M. Polimeni

Reconstruction: Studies in Contemporary Culture

Conflict over water resources is rare and has not occurred for thousands of years. However, the dynamics in South Asia are changing so rapidly that a conflict in the not-so-near future may be unavoidable. Water shortages could have the nonlinear effects of food shortages, political instability, migration problems, and diminished economic growth. All of these factors, caused by water shortages, could be a driver of conflict in the region, causing territorial disputes. Global instability would be sure to follow as both the U.S., attempting to protect their national security interests, and China, reacting as the regional power, tries to intervene. …

Dams, Plants, Pipes And Flows: From Big Water To Everyday Water, Fiona Allon

Reconstruction: Studies in Contemporary Culture

This paper focuses on patterns of domestic water consumption. It develops an approach that emphasises the importance of seeing water use as part of a broader set of consumption practices associated with the space of the home, the garden and suburban living. Water consumption is considered as a practice that is embodied and embedded in daily life. The paper also presents the project Everyday Water as a case study of recent cultural studies research on domestic water use. The cultural approach adopted in the project represents a significant departure from much conventional resource and environmental management-based work. The Everyday Water …

Micron-Level Actuator For Thermal-Fluid Control In Microchannels, Nurhak Erbas

Mechanical & Aerospace Engineering Theses & Dissertations

Effectiveness of an actuator is investigated for thermal-flow control in microchannels. First, simulations of a single actuator in a quiescent external medium are performed in order to study the parameters characterizing the synthetic jet flow from the actuator. For this purpose, a simplified, two-dimensional configuration is considered. The membrane motion is modeled in a realistic manner as a moving boundary in order to accurately compute the flow inside the actuator cavity. The geometric and actuation parameters of the actuator are investigated to define the effectiveness of the jet flow. The study is done initially at macro scales. Then, the flow …

Efficient Unbiased Estimating Equations For Analyzing Structured Correlation Matrices, Yihao Deng

Mathematics & Statistics Theses & Dissertations

Analysis of dependent continuous and discrete data has become an active area of research. For normal data, correlations fully quantify the dependence. And historically, maximum likelihood method has been very successful to estimate the correlations and unbiased estimating equation approach has become a popular alternative when there may be a departure from normality. In this thesis we show that the optimal unbiased estimating equation coincides with the likelihood equations for normal data. We then introduce a general class of weighted unbiased estimating equations to estimate parameters in a structured correlation matrix. We derive expressions for asymptotic covariance of the estimates, …

An Operational Model For Mobile Sensor Cloud Management, Indrajeet Kalyankar

Electrical & Computer Engineering Theses & Dissertations

Mobile sensors provide a safe, cost effective method for gathering information in hazardous environments. When the hazardous environment is either unexplored, such as the surface of Mars, or unanticipated, such as the result of chemical contamination, it is desirable for a system to gather information with a minimal amount of outside control (localization, decision control, etc.) and prepositioned sensors. If one takes a look at the number of the sensors deployed on a scale, at the lower end is the sole, multipurpose sensor unit. The upper end deals with hordes of inexpensive, expendable sensors. In the middle, a cluster of …

Teamwork In Chinese Organizations: A New Concept And Framework, Ying Liu

Psychology Theses & Dissertations

Teamwork has always been a challenge in China, and the importance of teamwork has not been well recognized. This study was designed to explore the underlying definition of teamwork that Chinese people use to describe their teams, to identify variables related to teamwork, to develop a new framework and measure of teamwork in Chinese organizations, and to test the psychometric properties of the measure as well as the structural relationships of the new framework of teamwork in Chinese teams. This study also examines the influence of guanxi---an important Chinese cultural value that emphasizes exchange and reciprocity in relationships---on teamwork in …

An Adaptive Algorithm To Identify Ambiguous Prostate Capsule Boundary Lines For Three-Dimensional Reconstruction And Quantitation, Rania Yousry Hussein

Electrical & Computer Engineering Theses & Dissertations

Currently there are few parameters that are used to compare the efficiency of different methods of cancerous prostate surgical removal. An accurate assessment of the percentage and depth of extra-capsular soft tissue removed with the prostate by the various surgical techniques can help surgeons determine the appropriateness of surgical approaches. Additionally, an objective assessment can allow a particular surgeon to compare individual performance against a standard. In order to facilitate 3D reconstruction and objective analysis and thus provide more accurate quantitation results when analyzing specimens, it is essential to automatically identify the capsule line that separates the prostate gland tissue …

Estimating Familial Correlations Using A Kotz Type Density, Amal Helu

Mathematics & Statistics Theses & Dissertations

Two useful familial correlations often used to study the resemblance between the family members are the sib-sib correlation (ρ_ss) and the mom-sib or parent-sib correlation (ρ_ps). Since their introduction early in the last century by Galton, Fisher and others, many improved estimators of these correlations have been suggested in the literature. Several moment based estimators as well as the maximum likelihood estimators under the assumption of multivariate normality have been extensively studied and compared by various authors. However, the performance of these estimators when the data are not from multivariate normal distribution is poor. In this …

Unsteady Numerical Analysis Of A 2-Dimensional, Hydrogen Fueled, Air-Breathing Dual Mode Scramjet Engine, Nathan John Luetke

Mechanical & Aerospace Engineering Theses & Dissertations

Upstream interaction in a transient two-dimensional dual-mode scramjet engine is examined. This research is performed to compare completed and verified steady results with unsteady results in order to have a better understanding of the flow field. The flow is solved numerically with a Mach 2.5 free stream and sonic normal injection of hydrogen fuel emanating from facing walls while no symmetry assumptions were made. The free stream is modeled as vitiated air in order to produce comparable flight enthalpies and stagnation properties at the combustor inlet during flight conditions of approximately Mach 7. The vitiated stream consists of water vapor …