Digital Commons Network^™

Use Of Mushroom Extract To Enhance Quality And Health Benefits Of Dairy Products, Osman A. Hassan

Dissertations

Bifidobacteria and Lactobacilli are purportedly beneficial to human health and are called probiotics which are live microorganisms, when administered in adequate amounts conferring a health benefit on the host. It is believed that the maximum probiotics effect can be achieved if the organisms adhere to intestinal mucosal cells. Probiotics, perhaps in combination with prebiotics, may become an important means of preventing and treating disease. In fact, several types of diarrhea have been successfully treated with probiotics. The mechanisms behind favorable clinical outcome are still largely unknown, however, the potential benefits of probiotic therapy promise to be almost limitless. Organic acids …

Use Of A Bacteriophage Cocktail In Combination With Modified Atmosphere Packaging To Control Escherichia Coli O157:H7 Contamination On Fresh-Cut Green Leafy Vegetables, Olcay Boyacioglu

Dissertations

The 2006 multi-state Escherichia coli O157:H7 (EHEC) outbreak linked to bagged spinach raised concerns about the safety of fresh produce. One novel approach to control foodborne pathogens is lytic bacteriophages, which does not affect the produce microflora. The objectives of this study were; 1) to test and verify the efficacy of a phage cocktail against EHEC in a laboratory medium, 2) to determine the effectiveness of the phage cocktail on fresh-cut leafy greens, and 3) to test and compare the effectiveness of the phage cocktail against EHEC on fresh-cut green leafy vegetables stored under air and modified air (low O2/high …

Variable Block Size Motion Compensation In The Redundant Wavelet Domain, Ahmed Abdelgadir Suliman

Dissertations

Video is one of the most powerful forms of multimedia because of the extensive information it delivers. Video sequences are highly correlated both temporally and spatially, a fact which makes the compression of video possible. Modern video systems employ motion estimation and motion compensation (ME/MC) to de-correlate a video sequence temporally. ME/MC forms a prediction of the current frame using the frames which have been already encoded. Consequently, one needs to transmit the corresponding residual image instead of the original frame, as well as a set of motion vectors which describe the scene motion as observed at the encoder. The …

Reduced-Order Equivalent-Circuit Models Of Thermal Systems Including Thermal Radiation, Serap Karagol

Dissertations

We established a general, automatic, and versatile procedure to derive an equivalent circuit for a thermal system using temperature data obtained from FE simulations. The EC topology was deduced from the FE mesh using a robust and general graph-partitioning algorithm. The method was shown to yield models that are independent of the boundary conditions for complicated 3D thermal systems such as an electronic chip. The results are strongly correlated with the geometry, and the EC can be extended to yield variable medium-order models. Moreover, a variety of heat sources and boundary conditions can be accommodated, and the EC models are …

Acts-Hf: Attention, Cognition And Self-Care In Heart Failure, Catherine M. Murks

Dissertations

Background: Patients with heart failure (HF) are required to participate in self-care activities. This activities include taking prescribed medications, monitoring for symptoms, intervening appropriately and evaluating the response to the treatment. Cognitive impairment occurs relatively frequently in this population. Few studies have attempted to describe the nature of the relationship between self-care and cognitive impairment in this population.

Purpose:/ This study investigated the relationship between cognitive function and self-care ability in patients with HF. It also investigated the relationship between both self-care and cognitive function and subsequent hospital admission.

Methods:/ Participants were recruited from outpatient areas at two cardiology groups …

A Grounded-Theory Study Of The Teaching Methods Of Jesus : An Emergent Instructional Mode, Liv Fønnebø

Dissertations

Problem. While models of teaching and teaching methods have manifested themselves in the wake of most major world philosophies and thus are accessible to present-day educators, a defined model of teaching based on the Christian worldview is harder to find. This is strange, given the fact that the person who, by definition, stands as close to the Christian worldview as one can possibly get, Jesus Christ has the reputation of being one of the greatest teachers ever. Institutions that offer an education aligned with the Christian worldview should be the ones showing greatest interest in a model of teaching derived …

The Therapeutic Effects Upon Dog Owners Who Interact With Their Dogs In A Mindful Way, Amy Jackson-Grossblat

Dissertations

Problem. For many in contemporary culture, the pursuit of possession has become an attempt to achieve happiness. However, this path may not always be congruent with psychological well-being. In addition, this path may lead us further away from relationships within the natural world. Humanistic and existential psychologists have suggested that a mindful connection to ourselves, to other-than-human beings, and to the natural world would enable more meaningful lives. If dogs are considered an extension of nature and those interactions between dog and owner that promote mindfulness are examined, there is the potential to obtain a better understanding of how individuals …

Communicating Vision : A Linguistic Analysis Of Leadership Speeches, Debrah J. Martin

Dissertations

Leadership literature contains ample recommendations that leaders need to have a vision and be competent in visioning. A small subset of that literature recommends that leaders communicate their visions. There are few resources, however, that guide leaders how to communicate their visions. This study consists of an application of Systemic Functional Linguistics (SFL), including Genre Theory, and an extension of SFL, Appraisal Theory, on four visionary speeches in the field of political discourse—Lincoln‘s Gettysburg Address, Churchill‘s ―We Shall Fight on the Beaches,‖ Kennedy‘s inaugural, and Martin Luther King Jr.‘s ―I Have a Dream‖—to discover how these leaders were able to …

Instructors' Perceptions Of The Bologna Model Of Higher Education Reform In Cameroon, Zachary Y. Mngo

Dissertations

Problem Statement. The literature on education in Cameroon suggests that there is a deep-rooted history of resistance to educational reform and harmonization both at the K12 and higher education levels. Attempts by political and educational leaders to reform and harmonize the two very distinct systems of education, inherited from former colonizers (France/Britain), have failed in the past because of failure by policy makers to take care of the socio-cultural, professional, and academic demands of educational stakeholders—faculty, students, parents, and educational leaders. At the center of resistance has been the fear by Francophone and Anglophone students and faculty that their …

The Impact Of Family, Community, And Resilience On African-American Young Adults Who Had Parents Incarcerated During Childhood, Marilyn Diana Ming

Dissertations

Problem. Parental incarceration affects millions of children, and their numbers continue to rise. By losing their parents, children can be exposed to unique risks, relative to the separation. Many children face family structure disintegration, and this can be so disruptive that their normal development is impaired. Evidence suggests that children are impacted psychologically, socially, and financially. The result is the display of problematic behavior, being aggressive or withdrawn at home and in their communities. The concentration of the incarceration trends seems to be in poor African-American communities. Incarceration has left higher numbers of children without parents, making the collateral damage …

A Flexible Syntactic Foam For Shock Mitigation, Jogi C. Gowda

Dissertations

This dissertation focused on the development and assessment of flexible microballoons filled elastomeric foam for shock mitigation applications. The overall goal of the research was to develop a flexible syntactic foam that has controllable bulk modulus, compressibility and shock mitigation characteristics and to validate these characteristics by experiments. Elastomer LP-2 with solid manganese dioxide and uncured BJO-093 hollow Pμb were chosen for making the syntactic foam. Hand mixing and room temperature curing was used to make foams of 0 to 30% weight of filler, which amounts to 0 to 60% of volume of the filler. Analysis using gas laws and …

Examining The Influence Of Dependent Demand Arrivals On Patient Scheduling, Husniyah B. Abdus-Salaam

Dissertations

This research examines the influence of batch appointments on patient scheduling systems. Batch appointments are characterized by multiple patients within a family desiring appointments within the same time frame. These patients are considered to be dependent amongst each other within the batch request for both arrival and no-shows. Three models are proposed to further understand the impact of these dependent demand arrivals. First, a multivariate statistical model is developed to understand the behavior of patients at public and private dental clinics. Results indicate that approximately 42% of all appointments are associated with a batch request. Also, there is a dependency …

Characterization Of Nanoparticle-Induced Airway Oxidant Stress And The Antioxidant Effects Of Sorrel (Hibiscus Sabdariffa): An Omics Approach, Christa Young Watson

Dissertations

Nanotoxicology is the study of the potential toxic effects of anthropogenic and biogenic nanostructures on living organisms. The influence of nanostructures such as nanoparticles on the human airway has gained interest due to increased susceptibility of translocation into other regions of the body. Adverse effects such as oxidative stress and inflammation have been found after the inhalation of airborne nanoparticles in airway epithelial cells. Oxidative stress and inflammation in mice models have been attenuated through the consumption of antioxidant containing plant compounds called phytochemicals. In this dissertation, we have evaluated the hypothesis that nanoparticles regardless of origin can elicit oxidative …

Impact Damage Resistance And Tolerance Of Polymer Nano-Fiber Interleaved Composite Laminates, Paul Kwaku Akangah

Dissertations

The primary limitation of fiber reinforced composite laminates is their poor interlaminar strength and fracture toughness that result in poor impact damage resistance and tolerance. A number of methods have been tried to address this limitation. These methods are limited by factors such as increase in cost, weight, or loss of in-plane properties. A promising approach which does not degrade the in-plane properties is interleaving. Thermoplastic particle interleaving has been applied to reinforce laminates but the primary concern of in-plane properties degradation has not been addressed. Polymer nano-fiber interleaving was investigated in this dissertation as an alternative approach to particle …

Retaining International College Students: Promoting Proactive Institutional Support Services For Successful Adjustment, Craig Cameron Curty

Dissertations

This study investigates whether institutions with centralized international student support offices have higher retention rates and higher overall grade point averages for undergraduate F1 visa status non-native English speaking international students. Modeled on Astin's (1984) Student Involvement Theory, the research study proposes and tests a model of undergraduate F1 visa status non-native English speaking international student frequency of involvement and whether an international student office (ISO) moderates this relationship by increasing undergraduate F1 visa status non-native English speaking international student frequency of involvement leading to positive academic outcomes, specifically focusing on overall grade point average (GPA) and retention. If this …

Investigating The Influence Of Organic Acids On Uraninite Solubility And Uranyl Sorption Onto Kaolinite, Michelle L. Barger

Dissertations

Within anoxic near surface aqueous settings where U0_2(S) may be released an opportunity to encounter and complex with organic acids may occur. Reactions between U0_2(S) and ligands may promote the solubility and mobility of uranium. Organic ligands investigated in the dissolution work include citric acid, NTA and EDTA. Exposure to the ligands had little effect on U0_2(S) solubility. The log activity of U0_2(S) hydrolysis under reduced conditions was -6.56. Under all measured conditions of ligand concentration, the data consistently show an increase in uranium concentration to a median log U activity of -4.89. The observed solubility …

Collaborative Classification Of Multiple Ground Vehicles In Wireless Sensor Networks Based On Acoustic Signals, Ahmad Falah Aljaafreh

Dissertations

Classification of ground vehicles based on acoustic signals can be employed effectively in battlefield surveillance, traffic control, border monitoring, and many other applications. Classification of multiple dynamic targets based on time varying continuous signals in WSNs is a big challenge. In this project, we tackle the problem of estimation of the number and types of multiple moving ground vehicles, that are passing through a region monitored by a wireless sensor network. This work is divided into three parts, the first is the feature extraction from the vehicle sounds where various feature extraction techniques for vehicle acoustic signal are evaluated based …

Dielectric Properties Of Nitrogen Incorporated Ultrananocrystalline Diamond Films , Salem Alfaify

Dissertations

Deposition of Ultrananocrystalline Diamond (UNCD) films have been carried out and dielectric properties of nitrogen incorporated UNCD films were studied using spectroscopic ellipsometry (SE), UV/VIS spectroscopy, and reflectance spectroscopy. Dielectric functions of the films were correlated with their nanostructure, elemental concentration, and growth conditions. The films were grown in a 915 MHz microwave plasma chemical vapor deposition system with 0%, 10%, and 20% N2 gas diluted into Ar/CH4/H2 plasma. Samples were deposited on 6-inch Si substrates. For UV/VIS spectroscopy studies, samples were deposited on quartz substrates. The bonding structure was investigated by Raman spectroscopy and the surface morphology of the …

Cross-Layer Design For Mobile Ad-Hoc Unmanned Aerial Vehicle Communication Networks, Abdel Ilah Nour Alshbatat

Dissertations

Mobile Ad-Hoc network (MANET) is a popular type of wireless network that is formed by a collection of mobile nodes. Each node in such a network has the capability to communicate with its neighbors and non-neighbors through a wireless medium without using any existing network infrastructure. Due to the lack of infrastructure, all nodes in Ad-Hoc network are designed to act as an end system and a router for other nodes.

Traditionally, the dominant design methodology for network protocols was based on the open systems interconnection (OSI) reference model. This methodology divided the stack into seven layers in which each …

A Study To Determine The Influence Of Workload On Nursing Personnel, Supreeta G. Amin

Dissertations

The alarming number of adverse medical events and associated costs have placed immense importance toward the safety and health of both patients and medical personnel. A shrinking nurse workforce, an aging patient and nursing population coupled with a mismatch between hospital demands and the available nursing staff have created a situation detrimental to both patient and nursing personnel. Long working hours, working more than one job, low staffing ratios, high patient acuity, minimal social support, low experience level, complicated equipment, complex procedures and varying workload are some factors that may have a negative impact on the quality of care provided …

New Media Icc Profiles Construction And Concerns, Reem El Asaleh

Dissertations

With the advent of the modern digital technology, users can now capture an image and reproduce it between different media, such as display it on LCD monitor or tablet computer, print it on desktop printer or send it to a printing press. The challenge has been then to maintain the accuracy of image colors during this reproduction, which has led to the development of Color Management Systems. Using these systems, the color reproduction across-media will be accomplished using device ICC profiles that describe each device’s color characterization data in a standardized format based on International Color Consortium (ICC) specifications.

ICC …

Leach-Sm: A Protocol For Extending Wireless Sensor Network Lifetime By Management Of Spare Nodes, Bilal Abu Bakr

Dissertations

Operational lifetime of a wireless sensor network (WSN) depends on its energy resources. Significant improvement of WSN lifetime can be achieved by adding spare sensor nodes to WSN. Spares are ready to be switched on when any primary (a node that is not a spare) exhausts its energy. A spare replacing a primary becomes a primary itself.

The LEACH-SM protocol (Low-Energy Adaptive Clustering Hierarchy with Spare Management) proposed by us is a modification of the prominent LEACH protocol. LEACH extends WSN lifetime via rotation of cluster heads but allows for inefficiencies due to redundant sensing target coverage. There are two …

Contemporary Clothing Issues Of Women Who Are Post-Mastectomy, Carol Beard

Dissertations

The intent of this three-paper format dissertation is to examine three topics germane to the clothing requirements and clothing acquisition of women who are postmastectomy. Each paper’s focus resides within a broader theme of addressing a population that has specialized clothing needs. While each study is independent in nature, they build on each other. The first paper describes the demographics of the population and how those demographics and treatment path for breast cancer provide a different framework for reaction to the retail offerings currently on the market. The next paper focuses on the association between demographics and treatment path of …

"Don't Let The Job Change You; You Change The Job": The Lived Experiences Of Women In Policing, Carrie Buist

Dissertations

In the last decade, the percentage of women working as police officer has not seen any significant increase. This dissertation, "Don't Let the Job Change You; You Change the Job:" The Lived Experiences of Women in Policing uses in-depth, participant guided interviews with current women police officers to gain a better understanding of their experiences. The goal of this project was to allow the women to speak for themselves, and in sharing the narratives of their lived experiences as officers, both add to and build on the existing research on women working in policing. In addition to the interviews, observations …

Using Environmental Sounds To Initiate Receptive Language Training For Children With Autism, Woan Tian Chow

Dissertations

A pre-test showed that three pre-school children with autism had difficulty learning to match spoken words to objects (receptive identification). Therefore, they were first taught to match environmental sounds to objects (e.g., to touch a tambourine, when they heard the sound of the tambourine) and then to match spoken words to other objects while continuing to match the mastered environmental sounds to the original objects.

For all three children, simply learning the environmental-sound/object matching did not facilitate learning spoken-word/object matching; however intermixing the training of spoken-word/object matching with the previously mastered environmentalsound/ object matching did result in the mastery of …

Experiences That Influence A Student's Choice On Majoring In Physics, Donya Rae Dobbin

Dissertations

Currently the production of college graduates with science and engineering degrees is insufficient to fill the increasing number of jobs requiring these skills. This study focuses on physics majors with an in-depth examination of student transitions from high school to college. Many different areas of influence could affect a student's decision to major in physics. The first phase of this study addresses all of the potential areas of influence identified from the literature. The goal was to identify common influences that might be used to increase students' interest in majoring in physics. Subjects (N=35) from the first phase were recruited …

Debugging Support For Message-Passing Based Concurrent Software, Mohamed Medhat Elwakil

Dissertations

Today, multi-core processors are used in all computing aspects, including embedded systems such as mobile devices. In order for software programs to benefit from the transition to multi-core processors, the programs need to be concurrent.

Recent research shows that programs developed using the message-passing model can scale better than programs developed using the shared-memory model. However, the message-passing model is not widely adopted, partly, because of the lack of debugging tools. Debugging message-passing programs is very intricate due to their inherent nondeterministic behavior; even with the same input, a program may behave differently when executed multiple times. Bugs in message-passing …

The Impact Of Structured Group Counseling On Resiliency, Self-Efficacy, And Racialidentity Among African American Female Teenagers, Lashonda B. Fuller

Dissertations

African American female teenagers are at-risk for low academic achievement as well as personal and social problems. These concerns have the potential to impact their psychological development including resiliency, self-efficacy, and racial identity. This is an issue that needs focused attention. Therefore, the purpose of this dissertation was to determine if a structured group counseling model effectively impacts African American female teenagers‟ resiliency, self-efficacy, and racial identity. The researcher conducted four structured counseling groups over a period of 20 weeks; however, the teenagers participated in consecutive 10 week sessions. The treatment was applied to two groups simultaneously, and the groups …

Relativistic R-Matrix Theory, Janina Grineviciute

Dissertations

We have developed a relativistic coupled{channel reaction theory in which binary break-up channels satisfy a relative Dirac equation. This theory is developed by extending the R-matrix formalism of Lane and Thomas to the relativistic case and implementing the Dirac oscillator basis. The motivation for this project is testing po- tentials for the dense matter calculations and generating relativistic wave functions for the nal states in the knockout reactions. As an example of the formalism we have calculated observables for the proton scattering on light-to-medium weight nuclei in the relativistic impulse approximation using the relativistic Love-Franey amplitudes of Horowitz. The R-matrix …

The Gendered Plight Of Terror: Annexation And Exile In Latvia 1940-1950, Irene Elksnis Geisler

Dissertations

Drawing on methodologies employed in Oral History and Memory scholarship, this qualitative study utilizes the lens of gender to explore narratives contesting time-honored notions of violence, war and peace. It examines Latvia's history through the voices of women from 1940 to 1950. This project seeks to interpret Latvian history based on the experiences of those who survived invasion, exile and deportation. It positions the narratives of women at the center rather than at the margins of historical analysis. The project analyzes themes central to women's social roles in order to attain a more complete understanding of war, exile and people's …