Open Access. Powered by Scholars. Published by Universities.®

Arts and Humanities Commons

Open Access. Powered by Scholars. Published by Universities.®

Articles 1 - 30 of 550

Full-Text Articles in Arts and Humanities

Linear And Nonlinear Control Of Unmanned Rotorcraft, Ioannis A. Raptis Nov 2009

Linear And Nonlinear Control Of Unmanned Rotorcraft, Ioannis A. Raptis

Graduate Theses and Dissertations

The main characteristic attribute of the rotorcraft is the use of rotary wings to produce the thrust force necessary for motion. Therefore, rotorcraft have an advantage relative to fixed wing aircraft because they do not require any relative velocity to produce aerodynamic forces. Rotorcraft have been used in a wide range of missions of civilian and military applications. Particular interest has been concentrated in applications related to search and rescue in environments that impose restrictions to human presence and interference.

The main representative of the rotorcraft family is the helicopter. Small scale helicopters retain all the flight characteristics and physical ...


An Absence Of Presence: The Voices Of Marginalized Communities In The Development And Implementation Of Cultural Resource Management Initiatives In The British West Indies: A Case Study, Kelley Scudder-Temple Nov 2009

An Absence Of Presence: The Voices Of Marginalized Communities In The Development And Implementation Of Cultural Resource Management Initiatives In The British West Indies: A Case Study, Kelley Scudder-Temple

Graduate Theses and Dissertations

This dissertation research is the study of cultural resource management initiatives and

the extent to which archaeological surveys and excavations include or exclude African

Caribbean contemporary and historic communities, throughout these processes. Varying

types of archaeological sites identified by archaeologists, along with community

inclusionary measures are examined to determine as to the degree to which

archaeological surveys and excavations are reflective of historic and contemporary

African Caribbean communities.

Data were collected through archival research, interviews and surveys and analyzed

qualitatively to examine the degree to which stakeholders, particularly those who have

been historically marginalized, have been incorporated into these processes ...


True North Or Traveled Terrain? An Empirical Investigation Of Authentic Leadership, Matthew D. Tuttle Nov 2009

True North Or Traveled Terrain? An Empirical Investigation Of Authentic Leadership, Matthew D. Tuttle

Graduate Theses and Dissertations

Authentic leadership is a new concept that is gaining both popularity and notoriety in the leadership literature. It is argued as a positive form of leadership that goes beyond traditional leadership styles in order to influence followers through genuine, ethical behavior. However, as a concept in its infancy, authentic leadership has yet to receive much empirical attention, and many researchers are skeptical of its value in what is seen as a saturated domain of leadership styles. This study offers a comprehensive approach to addressing this need. A new measure for authentic leadership was developed and validated through pilot testing. Through ...


Training Teamwork In Medical Teams: An Active Approach With Role Play And Feedback, Matthew S. Prewett Nov 2009

Training Teamwork In Medical Teams: An Active Approach With Role Play And Feedback, Matthew S. Prewett

Graduate Theses and Dissertations

Recent reports in the field of medicine have recommended the use of teamwork training to reduce the number of injuries and fatalities from human error. Teamwork training in the field of medicine appears promising, but few empirical evaluations of such programs have confirmed their effectiveness. Existing teamwork training studies have tended to use a traditional, lecture approach to training, with positive but modest results upon teamwork attitudes and behaviors. The current study developed and evaluated a more active teamwork training protocol for trauma resuscitation teams. The training protocol supplemented several medical and non-medical role plays with a lecture and guided ...


Pegylation Of Niosomes, John A. Elliott Nov 2009

Pegylation Of Niosomes, John A. Elliott

Graduate Theses and Dissertations

The research presented in this dissertation describes the creation and characterization of a novel antibody-vesicle conjugate modified with polyethylene glycol (PEG) that possesses enhanced binding to and uptake by inflammation-activated endothelial cells with improved storage stability and longer shelf-life and potential reduction in immunogenic potential compared to previous designs.

Targeted drug delivery provides an effective means of delivering therapeutic concentrations of a drug to the site or organ of action. The drug is delivered using a niosome, a vesicle with an aqueous core and a bilayer membrane composed of non-ionic surfactants and cholesterol. Antibodies that recognize specific cell antigens are ...


Rhetorics Of Fear, Deployment Of Identity, And Metal Music Cultures, Gregory Vance Smith Nov 2009

Rhetorics Of Fear, Deployment Of Identity, And Metal Music Cultures, Gregory Vance Smith

Graduate Theses and Dissertations

The purpose of this study is to analyze the rhetorics of fear operating in public discourses surrounding metal music. This analysis focuses on how the public rhetorics deploy identity on listener populations through both the mediation and legislation of identities. Specifically, this mediation takes place using both symbols of fear and arguments constructed on potential threats. Texts for analysis in this study include film and television documentaries, newspaper articles, book-length critiques of and scholarship on heavy metal, and transcripts from the U.S. Senate Hearings on Record Labeling.

"Heavy metal" and "metal music" are labels that categorize diverse styles of ...


The Role Of Cocrystals In Solid-State Synthesis Of Imides And The Development Of Novel Crystalline Forms Of Active Pharmaceutical Ingredients, Miranda L. Cheney Nov 2009

The Role Of Cocrystals In Solid-State Synthesis Of Imides And The Development Of Novel Crystalline Forms Of Active Pharmaceutical Ingredients, Miranda L. Cheney

Graduate Theses and Dissertations

With a greater understanding of the fundamentals of crystal engineering lays the

potential for the development of a vast array of novel materials for a plethora of

applications. Addressed herein is the latent potential of the current knowledge base with

an emphasis upon cocrystallization and the desire for scientific exploration that will lead

to the development of a future generation of novel cocrystals. The focus of this

dissertation is to expand the cocrystallization knowledge base in two directions with the

utilization of cocrystals in the novel synthetic technique of cocrystal controlled solid-state

synthesis and in the development of active pharmaceutical ...


Tracing Anthropogenic Wastes: Detection Of Fluorescent Optical Brighteners In A Gradient Of Natural Organic Matter Fluorescence, Laura Kellie Dixon Nov 2009

Tracing Anthropogenic Wastes: Detection Of Fluorescent Optical Brighteners In A Gradient Of Natural Organic Matter Fluorescence, Laura Kellie Dixon

Graduate Theses and Dissertations

A dual wavelength method was developed for the field detection of optical brighteners

(OBs), fluorescent laundry additives used as indicators of anthropogenic wastes. The

method was quantitative for OBs under variable levels of fluorescent colored dissolved

organic matter (CDOM). Based on excitation at 300-400 nm and 440 and 550 nm

emission, the method assumed a constant ratio of fluorescence due to CDOM alone, even

if absolute amplitude varied. Concentrations of OBs were computed as the difference

between the observed 440 nm emission and the expected CDOM fluorescence at 440 nm,

as extrapolated from the 550 nm fluorescence and established CDOM ...


Investigation Of The Factors Influencing Skid Resistance And The International Friction Index, Luis G. Fuentes Nov 2009

Investigation Of The Factors Influencing Skid Resistance And The International Friction Index, Luis G. Fuentes

Graduate Theses and Dissertations

This dissertation is compiled of the findings of several phases of a detailed research study

that was aimed at investigating the Skid Resistance phenomenon.

In the first phase of the dissertation research a study was performed to evaluate the

different factors that influence frictional measurements obtained using the Dynamic

Friction Tester (DFT). A temperature calibration factor that would account for

temperature effects on DFT readings and IFI computations was developed. In addition,

other variables that also affect the friction measurements obtained using the DFT are

identified.

In the next phase of the dissertation research the effect of pavement roughness on ...


The Development Of A Human Polyomavirus Quantitative Pcr Assay To Assess Viral Persistence, Water Quality, And Human Health Risks, Shannon M. Mcquaig Nov 2009

The Development Of A Human Polyomavirus Quantitative Pcr Assay To Assess Viral Persistence, Water Quality, And Human Health Risks, Shannon M. Mcquaig

Graduate Theses and Dissertations

Microbial water quality is generally assessed using fecal indictor organisms; however host-specific microbial source tracking (MST) methodologies can be employed to differentiate sources of fecal pollution. The central goal of this research was to develop and validate a QPCR assay for the quantification of two human-specific polyomaviruses (HPyVs) in environmental water samples. These viruses are prevalent worldwide and produce lifelong, asymptomatic viruria in immunocompetent individuals.

A Taqman® quantitative PCR (QPCR) assay based on the conserved T-antigen of two HPyVs (JCV and BKV) was developed and optimized (Chapter 2). HPyVs were detected in a high proportion of human-associated waste samples (e ...


The Citric Acid Cycle Of Thiomicrospira Crunogena: An Oddity Amongst The Proteobacteria, Ishtiaque Quasem Nov 2009

The Citric Acid Cycle Of Thiomicrospira Crunogena: An Oddity Amongst The Proteobacteria, Ishtiaque Quasem

Graduate Theses and Dissertations

Thiomicrospira crunogena, a deep-sea hydrothermal vent chemolithoautotroph,

uses the Calvin-Bensen-Bassham cycle to fix carbon. To meet its biosynthetic needs for

oxaloacetate, oxoglutarate, and succinyl-coA, one would expect that this obligately

autotrophic Gammaproteobacterium would use a ‘wishbone’ version of the citric acid

cycle (CAC) to synthesize the intermediates necessary for biosynthesis, instead of the

fully oxidative version to minimize carbon loss as carbon dioxide. However, upon

examination of its complete genome sequence, it became apparent that this organism did

not fulfill this expectation.

Instead of a wishbone pathway, T. crunogena appears to run a fully oxidative

CAC. The cycle is ‘locked ...


Hemocompatibility Assessment Of 3c-Sic For Cardiovascular Applications, Norelli Schettini Oct 2009

Hemocompatibility Assessment Of 3c-Sic For Cardiovascular Applications, Norelli Schettini

Graduate Theses and Dissertations

The hemocompatibility of crystalline Silicon Carbide (SiC), in its cubic form (i.e., 3C-SiC), has been evaluated and compared to Silicon (Si), the leading material in biosensing applications. Silicon carbide (SiC) is a hard, chemically robust material, very well suited for harsh environment applications, and has been suggested to have very good biocompatibility. Additionally, SiC in its amorphous form, has been used as a coating for medical implantable devices such as bone prosthetics and cardiovascular stents. However, assessment of single crystal 3C-SiC for cardiovascular applications has not been reported. In this research we have studied the interactions of single crystal ...


Mercury Perception, Community Awareness And Sustainability Implications For The Tampa Bay Region, Florida, Trina Halfhide Oct 2009

Mercury Perception, Community Awareness And Sustainability Implications For The Tampa Bay Region, Florida, Trina Halfhide

Graduate Theses and Dissertations

Over one million acres of land and water in Florida has been classified as impaired by mercury. Approximately 80% of national fish advisories are issued due to mercury contamination. There have been a number of consumption advisories in the Tampa Bay Region for locally eaten fish such as largemouth bass ( Micropterus salmoides), bowfin (Amia calva), and alligator gar (Lepisosteus osseus). The main purpose of this study was to determine if there is adequate dissemination of mercury related risk information by government agencies to recreational and subsistence fishermen in the Tampa Bay Region. This research revealed that government agencies utilized simplified ...


Additive Latent Variable (Alv) Modeling: Assessing Variation In Intervention Impact In Randomized Field Trials, Peter Ayo Toyinbo Oct 2009

Additive Latent Variable (Alv) Modeling: Assessing Variation In Intervention Impact In Randomized Field Trials, Peter Ayo Toyinbo

Graduate Theses and Dissertations

In order to personalize or tailor treatments to maximize impact among different

subgroups, there is need to model not only the main effects of intervention but also the variation

in intervention impact by baseline individual level risk characteristics. To this end a suitable

statistical model will allow researchers to answer a major research question: who benefits or is

harmed by this intervention program? Commonly in social and psychological research, the

baseline risk may be unobservable and have to be estimated from observed indicators that are

measured with errors; also it may have nonlinear relationship with the outcome. Most of the ...


Medicare Part D Program: Prescription Drug Plan Copayment Structure And Premium Sensitivity, Rui Dai Oct 2009

Medicare Part D Program: Prescription Drug Plan Copayment Structure And Premium Sensitivity, Rui Dai

Graduate Theses and Dissertations

Since January 2006 Medicare beneficiaries have the option to purchase prescription drug benefits from Medicare under the Part D program. The addition of outpatient drugs to the Medicare programs reflects Congress’ recognition of the fundamental change in recent years in how medical care is delivered in the U.S. It recognizes the vital role of prescription drugs in the health care delivery system and the need to modernize Medicare to assure their availability to Medicare beneficiaries. The Medicare Prescription Drug Improvement and Modernization Act of 2003 (MMA) created the Medicare drug benefit and specified a standard plan. The law also ...


Cultural Competence In Health Care: A Client-Based Perspective, Karon L. Phillips Oct 2009

Cultural Competence In Health Care: A Client-Based Perspective, Karon L. Phillips

Graduate Theses and Dissertations

In response to the presence of health disparities among a diverse population of older adults, creating culturally competent health care services has emerged as a possible method to help reduce and eventually eliminate inequalities in health care. However, little information exists concerning the effectiveness of cultural competence, and even less is known about how culturally competent clients perceive their providers to be. This dissertation examined a number of indicators related to cultural competence, including the predictors of client-provider racial/ethnic concordance, client perceptions of the interpersonal sensitivity of their health care providers, and the overall satisfaction with care reported by ...


Molecular Intervention In Mouse Models Of Amyotrophic Lateral Sclerosis And Alzheimer’S Disease – Neuropathology And Behavior, Steven Prescott Bennett Oct 2009

Molecular Intervention In Mouse Models Of Amyotrophic Lateral Sclerosis And Alzheimer’S Disease – Neuropathology And Behavior, Steven Prescott Bennett

Graduate Theses and Dissertations

Neurodegeneration describes the progressive loss of structure and function of neurons, leading ultimately to cell and organism death. Although the initiating factors of neurodegenerative diseases such as Alzheimer’s, Parkinson’s, Huntington’s, and Amyotrophic Lateral Sclerosis may be different, they share common pathophysiologies. Proteinopathies, as these diseases are now termed, are characterized by atypical deposits of proteins, often due to misfolding. Associated with these deposits are dysfunctional mitochondria, oxidative stress, disrupted axonal transport, inflammation, and apoptotic cell death. If this occurs in motor neurons, as in ALS, ataxia precedes death with little or no change in cognition. On the ...


Goal Attainment On Long Tail Web Sites: An Information Foraging Approach, James A. Mccart Oct 2009

Goal Attainment On Long Tail Web Sites: An Information Foraging Approach, James A. Mccart

Graduate Theses and Dissertations

This dissertation sought to explain goal achievement at limited traffic “long tail” Web sites using

Information Foraging Theory (IFT). The central thesis of IFT is that individuals are driven by a

metaphorical sense of smell that guides them through patches of information in their environment.

An information patch is an area of the search environment with similar information. Information

scent is the driving force behind why a person makes a navigational selection amongst a group

of competing options. As foragers are assumed to be rational, scent is a mechanism by which to

reduce search costs by increasing the accuracy on ...


Development Of Three Dimensional Fluid-Structure Interaction Models For The Design Of Surface Acoustic Wave Devices: Application To Biosensing And Microfluidic Actuation, Reetu Singh Oct 2009

Development Of Three Dimensional Fluid-Structure Interaction Models For The Design Of Surface Acoustic Wave Devices: Application To Biosensing And Microfluidic Actuation, Reetu Singh

Graduate Theses and Dissertations

Surface acoustic wave (SAW) devices find uses in a plethora of applications including

but not limited to chemical, biological sensing, and microfluidic actuation. The primary aim of

this dissertation is to develop a SAW biosensor, capable of simultaneous detection of target

biomarkers in fluid media at concentrations of picogram/ml to nanogram/ml levels and removal

of non-specific proteins from sensor surface using the process of acoustic streaming, for potential

chemical sensing, medical, and clinical diagnostic applications. The focus is on the development

of three dimensional finite element structural and fluid-structure interaction models to study wave

propagation and acoustic actuation ...


Enhanced Co2 Storage In Confined Geologic Formations, Roland Tenjoh Okwen Sep 2009

Enhanced Co2 Storage In Confined Geologic Formations, Roland Tenjoh Okwen

Graduate Theses and Dissertations

Many geoscientists endorse Carbon Capture and Storage (CCS) as a potential strategy

for mitigating emissions of greenhouse gases. Deep saline aquifers have been reported to

have larger CO

2 storage capacity than other formation types because of their availability

worldwide and less competitive usage. This work proposes an analytical model for screening

potential CO

2 storage sites and investigates injection strategies that can be employed to

enhance CO

2 storage.

The analytical model provides of estimates CO 2

storage efficiency, formation pressure

profiles, and CO 2

–brine interface location. The results from the analytical model were

compared to those from ...


An Exploratory Analysis Of The Ecological Validity Of A Performance-Based Assessment Of Attention, Eun- Yeop Lee Sep 2009

An Exploratory Analysis Of The Ecological Validity Of A Performance-Based Assessment Of Attention, Eun- Yeop Lee

Graduate Theses and Dissertations

Executive functions impact everyday functioning. An individual’s ability to adapt

to and navigate their physical and social environments is largely determined by the ability

to organize oneself, to plan and to coordinate activities. Despite the wide variety of

cognitive tests that assess various aspects of executive function, there has been little work

to validate the use of these measures in predicting real world functioning (Sbordone,

Seyranian, & Ruff, 2000), particularly in children where characterization of executive

function is less specified. Evaluating the ecological validity of neuropsychological tests

has become an increasingly important topic over the past decade (Chaytor & Schmitter-

Edgecombe ...


Co-Transcriptional Splicing And Functional Role Of Pkcβ In Insulin-Sensitive L6 Skeletal Muscle Cells And 3t3-L1 Adipocytes, Eden Kleiman Sep 2009

Co-Transcriptional Splicing And Functional Role Of Pkcβ In Insulin-Sensitive L6 Skeletal Muscle Cells And 3t3-L1 Adipocytes, Eden Kleiman

Graduate Theses and Dissertations

PKC

βII is alternatively spliced during acute insulin stimulation in L6 skeletal

muscle cells. This PKC

βII isoform is critical in propagating GLUT4 translocation.

PKC

β protein and promoter dysfunction correlate with human insulin resistance. TZD

treatment ameliorates whole-body insulin-resistance. Its primary target is adipocyte

PPAR

γ, which it activates upon binding. This causes both altered circulating serum FFA

concentrations and adipokine secretion profile. How TZDs affect the intracellular

signaling of skeletal muscle cells is unknown. RT-PCR and Western blot analysis

showed that TZDs elevated PKC

βII by a process that involves co-transcriptional splicing.

PGC1

α overexpression most closely resembled ...


Martian Modules: Design Of A Programmable Martian Settlement, Craig A. Trover Sep 2009

Martian Modules: Design Of A Programmable Martian Settlement, Craig A. Trover

Graduate Theses and Dissertations

The evolution of human beings is marked

by adaptation. The ability to adapt to and

manipulate our environment is one definer of

intelligence, and ours is unique among life

on Earth. Since moving off of the African

Continent, humans have migrated to inhabit

every part of the Earth. Human existence

and perpetuity in the universe depends upon

the success of this adaptation, and inevitably,

migrating off of this planet. The technological

advances being developed today will change

our way of life, and enable people to travel to

and live permanently on the Moon and Mars.

This study involves the architectural ...


Motion Analysis Of Fluid Flow In A Spinning Disk Reactor, Valentina N. Korzhova Sep 2009

Motion Analysis Of Fluid Flow In A Spinning Disk Reactor, Valentina N. Korzhova

Graduate Theses and Dissertations

The ow of a liquid _lm over a rapidly rotating horizontal disk has numerous industrial applications including pharmaceuticals, chemical engineering, bioengineering, etc. The analysis and control of complex uid ows over a rapidly rotating horizontal disk is an important issue in the experimental uid mechanics. The spinning disk reactor exploits the bene_ts of centrifugal force, which produces thin highly sheared _lms due to radial acceleration. The hydrodynamics of the _lm results in excellent uid mixing and high heat or mass transfer rates.

This work focuses on developing a novel approach for uid ow tracking and analysis. Speci_cally, the developed algorithm ...


Density Functional Theory Studies Of Energetic Materials, Michael W. Conroy Sep 2009

Density Functional Theory Studies Of Energetic Materials, Michael W. Conroy

Graduate Theses and Dissertations

First-principles calculations employing density functional theory (DFT) were

performed on the energetic materials PETN, HMX, RDX, nitromethane, and a recently

discovered material, nitrate ester 1 (NEST-1). The aims of the study were to accurately

predict the isothermal equation of state for each material, improve the description of these

molecular crystals in DFT by introducing a correction for dispersion interactions, and

perform uniaxial compressions to investigate physical properties that might contribute to

anisotropic sensitivity.

For each system, hydrostatic-compression simulations were performed. Important

properties calculated from the simulations such as the equilibrium structure, isothermal

equation of state, and bulk moduli were compared ...


Interrelationships Among Personality, Perceived Classmate Support, And Life Satisfaction In Adolescents, Devon Renee Minch Aug 2009

Interrelationships Among Personality, Perceived Classmate Support, And Life Satisfaction In Adolescents, Devon Renee Minch

Graduate Theses and Dissertations

The purpose of the study is to investigate the relationships among personality factors and life satisfaction in high school students. High school students ( N = 625) completed self-report measures of personality characteristics (namely, extraversion, neuroticism, openness, conscientiousness, and agreeableness) and global life satisfaction. Results include the specific contribution of each of these personality dimensions as they relate to life satisfaction, gender differences, and the role of perceived classmate support in relationships between personality factors and life satisfaction. Specifically, findings revealed that about 45% of the variance in adolescents‟ life satisfaction scores was accounted for by their self-reported measures of personality factors ...


Removing Arsenic From Landfill Leachate In Batch Reactors With Kemiron Adsorbent, A Commercially Available Iron Oxide, Douglas Oti Jul 2009

Removing Arsenic From Landfill Leachate In Batch Reactors With Kemiron Adsorbent, A Commercially Available Iron Oxide, Douglas Oti

Graduate Theses and Dissertations

This research evaluated the effectiveness of a commercially available adsorbent, Kemiron, to remove arsenic from conditions representative of landfill leachate. Kemiron was identified as an iron oxide of 39.8 m

2/g surface area, 44 % of which resided in the less than 3 nm pore size range. Batch experiments of As(V) and As(III) were conducted with particle sizes either ≤38 μm and in the range 500 – 600 μm with equilibrium being reached in the smaller particles in ~ 36 hours and estimated at 374 hrs for the larger particles. Ionic strength did not affect the mass loadings of ...


Establishing Creative Writing Studies As An Academic Discipline, Dianne J. Donnelly Jul 2009

Establishing Creative Writing Studies As An Academic Discipline, Dianne J. Donnelly

Graduate Theses and Dissertations

The discipline of creative writing is charged "as the most untheorized, and in that respect, anachronistic area in the entire constellation of English studies (Haake What Our Speech Disrupts 49). We need only look at its historical precedents to understand these intimations. It is a discipline which is unaware of the histories that informs its practice. It relies on the tradition of the workshop model as its signature pedagogy, and it is part of a fractured community signaled by its long history of subordination to literary studies, its lack of status and sustaining lore, and its own resistance to reform ...


Building A Brighter Future Through Education: Student Housing For Single Parent Families, Carrie Cogsdale Jul 2009

Building A Brighter Future Through Education: Student Housing For Single Parent Families, Carrie Cogsdale

Graduate Theses and Dissertations

On the possibilities of a child the Center for Disease Control says, “Every Child

should have the opportunity to reach their full potential”. (CDC) Children who grow up

in low-income families are at risk of falling behind in education before they even enter

kindergarten. Single parents that struggle to provide food and shelter often lack the time

and the resources to provide the early education that their children need. A college

education could provide these parents and their children with a better quality of life.

University student housing could include built in childcare services, educational

assistance and peer support, for ...


Magnetization Dynamics And Interparticle Interactions In Ferrofluids And Nanostructures, Marienette B. Morales Jun 2009

Magnetization Dynamics And Interparticle Interactions In Ferrofluids And Nanostructures, Marienette B. Morales

Graduate Theses and Dissertations

Nanoparticle assemblies are of current interest as they are used in a wide variety of industrial

and biomedical applications. This work presents two studies aimed at understanding

the magnetization dynamics and interparticle interactions in nanoparticle assemblies

and various types of ferrofluids.

First, we studied the influence of varying strengths of dipolar interaction on the static

and dynamic magnetic properties of surfactant-coated monodispersed manganese-zinc ferrite

nanoparticles using reversible transverse susceptibility. We tracked the evolution of

the anisotropy peaks with varying magnetic field, temperature, and interaction strength.

The anisotropy peaks of weakly interacting particles appears as non-symmetric peaks and

at lower fields ...