Electrical and Computer Engineering

Performance Modeling of Single Processor and Multi-Processor Computer ArchitecturesbyHormazd. P. CommissariatDr. F. G. GrayElectrical Engineering(ABSTRACT)Determining the optimum computer architecture configuration for a specific application or a generic algorithm is a difficult task. The complexity involved in today s computer architectures and systems makes it more difficult and expensive to easily and economically implement and test full functional prototypes of computer architectures. High l...

Mathematics

This dissertation is devoted to investigating the time dependent neutron transportequations with reflecting boundary conditions. Two typical geometries --- slab geometryand spherical geometry --- are considered in the setting of <I>L^p</I> including <I>L^1</I>. Someaspects of the spectral properties of the transport operator <I>A</I> and the stronglycontinuous semigroup <I>T(t)</I> gen...

Science and Technology Studies

In this thesis, I draw attention to how representations of indigenous peoples and knowledges in the rhetoric of bioprospecting weave the people into multiple coordinates of discursive control. Bioprospecting, or the exploration of biological resources in search of valuable genetic and chemical material for commercial use, is portrayed by proponents as an ideal project which benefit all of its stakeholders. I challenge such perception by exposing the power relationships underlying bioprospecting ...

EDCI

The Denied Affective: A Deweyan perspective on Disequilibrium.It is the position of this paper that the body plays a crucial role in the manifestation of cognition and motivation. Cognition is situationally specific and emergent from a natural, habitual functioning process that is based on the embodied needs to transact with the environment. That natural function is the well-known Disequilibrium-Equilibrium function ( D-E f ), and the denied affective [the precognitive] is the embodied needs, de...

Statistics

Most traditional parametric and nonparametric regression methods operate under the assumption that the true function is continuous over the design space. For methods such as ordinary least squares polynomial regression and local polynomial regression the functional estimates are constrained to be continuous. Fitting a function that is not continuous with a continuous estimate will have practical scientific implications as well as important model misspecification effects. Scientifically, breaks i...

Architecture

From the ancient times, people used various kinds of natural material to build architecture. Because of the characteristics of natural materials, there are many limits to challenge the possibility of the architectural structure.After the fire of 1871 in Chicago, there were many incentives to convince Chicago architects to use steel as the material in grid structure buildings. For example, rising real estate prices, the advent of the safety elevator and availability of cost effective steel member...

Public Administration/Public Affairs

In this dissertation, I study the legitimacy of the Federal Reserve System. Administrative legitimacy, I argue, is an evaluative (or subjective) concept consisting of two beliefs: first, administrative institutions have a right to govern; second, they are an appropriate way to handle public tasks.After discussing scholarship on legitimacy, I examine the Federal Reserve System, asking two questions about it. First, how have its officials attempted to legitimate both their institution and their ac...

Mechanical Engineering

We tackle the problem of identifying thestructural dynamics of the twin tails of the F-15fighter plane. The objective is to firstinvestigate and identify the different possibleattractors that coexist for the same operatingparameters. Second is to develop a model thatsimulates the experimentally determined dynamics.Third is to suppress the high-amplitudevibrations of the tails due to either principalparametric or external excitations.To understand the dynamical characteristics of thetwin-tails, t...

Hospitality and Tourism Management

The Effects of Different Aspects of Tourism Services on Travelers Quality of Life: Model Validation, Refinement, and Extension<p>by<p>Janet Davis Neal<p>ABSTRACT<p>Numerous satisfaction studies have been conducted in both tourism and marketing which have examined various aspects of travelers and/or consumers. Quality of life satisfaction studies look beyond the types of satisfaction experiences that endure for only a short time to those tha...

Industrial and Systems Engineering

The need for cost-effective usability evaluation has led to the development of methodologies to support the usability practitioner in finding usability problems during formative evaluation. Even though various methods exist for performing usability evaluation, practitioners seldom have the information needed to decide which method is appropriate for their specific purpose. In addition, most methods do not have an integrated relationship with a theoretical foundation for applying the method in a ...

Mathematics

We develop the robust control theories ofstopping-time nonlinear systems andswitching-control nonlinear systems.We formulate a robust optimal stopping-timecontrol problem for a state-space nonlinear system and give theconnection between various notions of lower value functionfor the associated game (and storage function for the associateddissipative system) with solutions of the appropriate variationalinequality (VI). We show that the stopping-timerule can be obtained by solving the VI in thevis...

Educational Leadership and Policy Studies

<p>The purpose of this study was to examine the relationship between school leadership and the quality, condition, maintenance, improvements, and renovations of public school buildings. The first question examined the relationship between building conditions and perceptions of school board members, superintendent and central office staff, board of supervisors, and principals. The second question examined the relationship between building conditions and the financial support of lead...

Hospitality and Tourism Management

Relationship/collaborative selling, as opposed to traditional, transaction oriented selling, stresses the need to form relationships with prospects and customers across all stages of the buyer-seller relationship (Jolson, 1997). The problem is that applying the relationship selling process to all types of customers may lead to inappropriate interpersonal interaction if the customer s orientation is only short-term in nature (Jackson, 1985a, 1985b). Anderson and Narus (1991) make the point that s...

Civil Engineering

With the introduction of different forms of adaptive and actuated signal control, there is a need for effective evaluation tools that can capture the intricacies of real-life applications. While the current state-of-the-art analytical procedures provide simple approaches for estimating delay, queue length and stops at signalized intersections, they are limited in scope. Alternatively, several microscopic simulation softwares are currently available for the evaluation of signalized intersections....

Educational Leadership and Policy Studies

<p>The purpose of this study was to determine how current admission policies and practices at four-year public institutions of higher education in Virginia are implemented to evaluate home school applicants. University administrators, admission officials, and other interested individuals may gain insight into (a) admission policy implementation and informal practices, (b) anticipated policy revisions or new policy developments, (c) evaluative criteria currently being utilized to ev...

Educational Leadership and Policy Studies

American democracy fosters the common good of society by allowing citizen involvement in government. Sustaining American democracy depends on civic involvement among citizens. Civic involvement, which consists of citizens informed involvement in government, politics, and community life, is a desired behavior among adult citizens in the United States and it is a desired outcome of higher education. However, people in the latter part of the twentieth century have questioned the extent to which hig...

Teaching and Learning

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Near Environments

Since 1997, the retail industry of South Korea has suffered a decline in sales due to the nations financial crisis. Because of the increase of price consciousness, discount stores have become the stores most attractive to South Korean consumers. The purpose of this study was to (a) compare the differences between South Korean and the U.S. consumers in demographics, shopping orientation, perception of the importance of store and product attributes, and store evaluation, satisfaction and patronage...

Educational Leadership and Policy Studies

ABSTRACT<p>The purpose of this study was to explore leadership practices exercised by higher education leaders in Mongolia from the perspective of American leadership concepts. The study was based on leaders practices. That is, the study examined how higher education leaders conduct themselves as administrators and how their leadership practices are perceived by their subordinates. <p>This study differed from most of the related research on higher education in three w...

Electrical and Computer Engineering

This document explores Hidden Failures inprotection systems, which have been identifiedas key contributors in the degradation ofPower System wide-area disturbances. TheHidden Failure Modes in which the protectionsystems may fail to operate correctly andtheir consequences are identified in atheoretical approach. This theoretical sidehas its practical counterpart since a numberof Hidden Failure Modes are found in realwide-area disturbances.The original definition of Hidden Failure,which is a failu...

Educational Leadership and Policy Studies

An acute shortage of African American teachers is wellrecognized. This shortage poses a problem as school systemsattempt to employ a representative number of African American teachers commensurate to their diverse student population. The purpose of this study was to examine why 10 African American teachers in Roanoke City selected teaching and remain in the profession and how those reasons were influenced by two motivational variables (academic self-concept of ability and self-efficacy). Factors...

Psychology

This projectexamined the extent to whichpsychosocial or personal variablesmoderated the relationship betweenexposure to violence and use ofviolence in adolescents. Therelationship between exposure toviolence and use of violence wasexamined within a sample ofadolescents, ages 13 -18. The majorgoals of this study were to examinesome possible correlates of violenceuse and to determine the extent towhich certain personal variables(i.e., locus of control, social skills,feelings of despair, and certai...

Biology

Beta-Glucosidase (beta-D-glucoside glucohydrolase, EC 3.2.1.21) catalyzes the hydrolysis of aryl and alkyl beta-D-glucosides as well as glucosides with a carbohydrate moiety such as cellobiose and other beta-linked oligosaccharides. In maize (Zea mays L.), beta-glucosidase exists as 120 kD homodimers, but also forms high-molecular-weight (HMW) aggregates in certain maize inbreds (nulls). In this study we show that the null beta-glucosidase phenotype is caused by the formation of HMW enzyme aggre...

Teaching and Learning

<center><b>Exploring Preservice Teachers Perceptions of Classroom Cultural Diversity</b><p>Rose Kimani-Oluoch<p>Abstract<p></center>The purpose of this qualitative study was to develop a better understanding of how eight preservice teachers perceived the culturally diverse students they encountered during their one-year teaching internship. Their personal and professional experiences with diversity ...

Architecture

The objective of this thesis is not only to design abuilding or investigate an idea, but also to explore andlearn to appreciate what is truly important and, hope-fully, to discover that part of truth which may lead usto a serenity in our souls.My entire struggle is basically to try to achieve acomprehension of the order of nature. At some point in mylife as an architect, if I have to build an artifact, thatartifact should remind people of the everlasting meritsof the invisible world and awaken t...

History

On April 27, 1913, the body of thirteen-year-old Mary Phagan was discovered in the basement of her workplace in Atlanta, Georgia. Over the course of the following two years, her employer, Leo Frank, would be tried and convicted for her murder. Another employee, Jim Conley, a black janitor originally implicated in the crime, provided the evidence used to convict Frank. <p><p>In my thesis, I explain the multiple identities created to describe the victim and her accused ...

Computer Science

<p>A fundamental taskof algebraistsis to classifyalgebraic structures.For example,the classificationof finite groups has been widelystudied and has benefitedfrom the use of computational tools.Advancesin computer powerhave allowed researchersto attack problemsnever possible before.</p><p>In this dissertation,algorithmsfor <I>noncommutative</I>algebra,when <I>ab</I>is not necessarily equalto <...

Civil Engineering

<TITLE>The Use of GIS for Integrated Watershed Analysis:</TITLE><B><FONT SIZE=5><P ALIGN="CENTER">The Use of GIS for Integrated Watershed Analysis:</P></FONT><P ALIGN="CENTER">Integration of Environmental Models with GIS in the<BR>Upper Roanoke River Watershed</P><P ALIGN="CENTER"></P><P ALIGN=...

Educational Leadership and Policy Studies

The current study used data gathered as part of the Head Start/Public School Transition Project (Virginia Site), and included only data on the children who were part of Cohort II (i.e., enrolled in kindergarten in 1993). This database was examined to determine how select child and family characteristics uniquely contributed to parents and teachers ratings of the children s social skills and problem behaviors. A series of exploratory factor analyses (EFA), using principal components extraction an...

Public Administration/Public Affairs

This study investigates how the establishment of blame becomes a framework for sensemaking in a national policy subsystem. Using the only two fatal accidents in NASAs manned space flight history as case studies, this dissertation examines how the space policy subsystem responded to these two accidents and the process by which culpability was established. This dissertation extends our knowledge of how the blame dynamic operates within a policy subsystem and how, through this assignment of blame, ...

Teaching and Learning

From images of distance education (DE) in advertisements to examples of extant DE theory and practice, and finally to a possible dystopia and utopia for DE, this dissertation investigates the rich representations at the intersection of feminism, pragmatism, and web based distance education. It is composed of three parts. The first part is the construction of a feminist-pragmatic theoretical and analytical tool, motivated by images of DE in commercial advertisements. These images include control ...

Higher Education and Student Affairs

The purpose of this study is to investigate student leadership development. This study will investigate if there are any differences in the estimate of gains from attending college between students who participated in a Leadership Community and a sample of non-participants. In this study, estimate of gains is defined as students progress toward educational goals, as reflected in the College Student Experiences Questionnaire (CSEQ). The estimate of gains represents a measure of growth in college....

Geological Sciences

The quartz dioritic Quottoon Igneous Complex (QIC) is a major Paleogene (65-56 Ma) magmatic body in NW British Columbia and SE Alaska that was emplaced along the Coast shear zone (CSZ). The QIC contains two different igneous suites that provide information about source regions, magmatic processes and evolving tectonic regimes that changed from a dominantly convergent to a dominantly strike-slip regime between 65 to 55 Ma. Heterogeneous suite I rocks (e. g. along Steamer Passage) have a pervasive...

Electrical and Computer Engineering

This research focuses on radio wave propagation at millimeter-wave frequencies. A measurement based channel characterization approach is taken in the investigation.First, measurement techniques are analyzed. Three types of measurement systems are designed, and implemented in measurement campaigns: a narrowband measurement system, a wideband measurement system based on Vector Network Analyzer, and sliding correlator systems at 5.8+AH4AXA-mbox{GHz}, 38+AH4AXA-mbox{GHz} and 60+AH4AXA-mbox{GHz}. The...

Materials Science and Engineering

Sulfide minerals are a major source of metals; however, certain sulfide minerals, such as pyrite and pyrrhotite, are less desirable. Froth flotation is a commonly used separation technique, which requires the use of several reagents to float and depress different sulfide minerals. Xanthate, a thiol collector, has gained immense usage in sulfide minerals flotation. However, some sulfides are naturally hydrophobic and may float without a collector.Iron sulfides, such as pyrite and pyrrhotite, are ...

Educational Leadership and Policy Studies

<p> One recent trend in colleges and universities across the nation is theinternationalization of higher education. This internationalization has taken form in twodifferent areas: (a) the curriculum and (b) the co-curriculum. The curricular realm hasresponded by offering additional or new programs in languages and area studies as well asopportunities to study abroad. The co-curricular realm has also responded in the constructionof international centers, and the development of inter...

Crop and Soil Environmental Sciences

The yield response of soybean [Glycine max (L.) Merr.] to reproductive stage applications of either nitrogen (N) or boron (B) has been inconsistent. This study evaluated soybean seed yield response to foliar applications of B and soil applications of N at two stages of plant development, at two row spacings, at four irrigation levels, and on three cultivars over three years. Planting dates were either mid-May or mid-June, except the year two of the irrigated soil moisture experiment which had a ...

Civil and Environmental Engineering

The purpose of this research was to apply a discrete-bubble model to predict the performance of several hypolimnetic oxygenators. The model is used to predict the oxygen transfer rate in a hypolimnetic oxygenator based on the initial bubble size formed at the diffuser. The discrete-bubble model is based on fundamental principles, and therefore could also be applied to other mass transfer applications involving the injection of bubbles into a fluid. The discrete-bubble model has been applied to a...

Economics (Arts and Sciences)

We introduce a spatial cost topology in thenetwork formation model analyzed by Jackson andWolinsky, <i>Journal of Economic Theory </i><b>71</b> (1996), 44--74. This cost topology mightrepresent geographical, social, or individualdifferences. It describes variable costs ofestablishing social network connections.Participants form links based on a cost-benefitanalysis. We examine the pairwise stable networkswithin this spatial environment. Inc...

Political Science

Regardless of one s position on what has come to be called postmodern theory, there is no denying that this theoretical perspective is challenging the legitimacy of many of the traditional concepts of political and social theory. Foremost among these challenges is the opposition that postmodern theory pose to any attempt to provide foundational certainty on which subjectivity, our sense of who we are and our place in the world, can be established.<p>This thesis explores this postmo...

Electrical and Computer Engineering

In fiber optic communication systems, the main linear phenomenon that causes optical pulse broadening is called dispersion, which limits the transmission data rate and distance. The principle nonlinear effect, called self-phase modulation, can also limit the system performance by causing spectral broadening. Hence, to achieve the optimal system performance, high data rate and low bandwidth occupancy, those effects must be overcome or compensated. In a nonlinear dispersive fiber, properties of a ...

Architecture

How do I sense the domain of a place?How does it support my own domain?How does the place communicate its individuality?How does my self listen to this presence?How does the place nurture my inquiries?How does my intuition inhabit the place?Then, when one s own existence becomesevident, one meets the place.

Curriculum and Instruction

Good student evaluations are not always the measure of a successful class, and in spite of my consistently high student evaluations, I knew something had been lost in my classes. In an effort to revitalize my teaching, to increase both student participation and instructor satisfaction, I undertook an experiment in which I taught two sections of the same literature survey differently. One class was taught as I had, of recent years, been teaching: primarily lecture. The second class was decentrali...

Geological Sciences

Paleontological documentation of hybridization events has the potential to address a multitude of evolutionary and paleobiological issues unanswerable by purely biological means. However, previous studies of modern hybrids suggest that their morphology is often insufficient for their reliable discrimination. This study analyzes the morphology of an extant, genetically-identified <i>Mercenaria</i> spp. (Bivalvia: Veneridae) hybrid zone using Bookstein coordinates and m...

Electrical and Computer Engineering

<p>Since the 1950s, hidden Markov models (HMMS) have seen widespread use in electrical engineering. Foremost has been their use in speech processing, pattern recognition, artificial intelligence,queuing theory, and communications theory. However, recent years have witnessed a renaissance in the application of HMMs to theanalysis and simulation of digital communication systems. Typical applications have included signal estimation, frequency tracking, equalization, burst error charac...

Biology

Adult green anoles, Anolis carolinensis, exhibit numerous sex differences resulting from divergent strategies for maximizing reproductive success. I focused on the ontogeny of sex differences in behavior in juveniles, in relation to adult sex differences, by documenting the behavior of free-ranging juveniles, examining the structure and use of headbobbing displays, and determining the role of the androgen testosterone (T) in producing behavioral sex differences. Field observations indicated that...

History

This thesis proposes to analyze the dichotomous representation of the female model as benevolent and malevolent in three 19th-century French novels. Honoré de Balzacs The Unknown Masterpiece (1834), Jules and Edmond de Goncourts Manette Salomon (1867), and Émile Zolas The Masterpiece (1886) are all novels set in artists workshops and all portray the female model as playing an essential role in determining the success, then demise of the male painter. My study of these texts wil...

Biology

The genus Iliamna Greene has a taxonomically complex history. Since its desciption in 1906, the genus was not recognized for some time, several species were initially placed into other genera, and the species status of a few was questioned. Today, eight species of Iliamna are recognized. Six species are located in western North America and two are found isolated to the east. Species in Iliamna are very similar morphologically with only a few characters distinguishing several as separate entities...

Horticulture

In field experiments conducted in northern Virginia during 1998, oils reduced photosynthesis, fruit maturity, and crop yield. Three applications of a 1.5% (v/v) oil/water emulsion were made to Chardonnay and Cabernet Sauvignon vine canopies at 6200 L/ha (Chardonnay) and 2440 L/ha (Cabernet Sauvignon). Net assimilation rate (NAR), soluble solids concentration (SSC), and berry size were reduced by oil treatments when compared to an untreated control. Also in 1998, a 1.5% (v/v) oil/water emulsion a...

Civil Engineering

The transportation sector is the dominant source of U.S. fuel consumption and emissions. Specifically, highway travel accounts for nearly 75 percent of total transportation energy use and slightly more than 33 percent of national emissions of EPA s six Criteria pollutants. Enactment of the Clean Air Act Amendment of 1990 (CAAA) and the Intermodal Surface Transportation Efficiency Act of 1991 (ISTEA) have changed the ways that most states and local governments deal with transportation problems. T...