Digital Commons Network^™

Design And Experimental Study Of Turbo Equalization For Multiple Antenna Systems, Amirhossein Rafati

Doctoral Dissertations

"Multiple-input multiple-output (MIMO) wireless communication systems have attracted a lot of interest in the past decade due to their capability in delivering high spectral efficiency as well as their robust performance against fading. In MIMO inter-symbol interference (lSI) channels, a severe interference problem occurs due to the lSI and co-channel interference. Thus, the error propagation problem becomes more serious, and its mitigation has to be considered when designing the receiver. In this regard, a turbo equalizer which exchanges soft information between the equalizer and the decoder has been shown to be an effective method to combat the lSI caused by …

Therapeutic Effects Of N-Acetylcysteine Amide In The Treatment Of Eye Disorders, Joshua W. Carey

Doctoral Dissertations

"The loss of vision from age-related eye diseases now affects over 30 million people in the United States and is expected to reach twice that number within the next couple of decades. Among these disorders, age-related macular degeneration and cataract formation represent the largest percentage of these cases. Therapeutic options available for treating age-related macular degeneration are limited and there is no noninvasive form of treatment for cataracts current available. Several studies have indicated that oxidative stress plays an important role in the pathology of these age-related eye disorders. If oxidative stress is responsible for the initiation and progression of …

Computational Fluid Dynamics (Cfd) Modeling Of Mixed Convection Flows In Building Enclosures, Alexander Kayne

All Theses and Dissertations (ETDs)

In recent years Computational Fluid Dynamics: CFD) simulations are increasingly used to model the air circulation and temperature environment inside the rooms of residential and office buildings to gain insight into the relative energy consumptions of various HVAC systems for cooling/heating for climate control and thermal comfort. This requires accurate simulation of turbulent flow and heat transfer for various types of ventilation systems using the Reynolds-Averaged Navier-Stokes: RANS) equations of fluid dynamics. Large Eddy Simulation: LES) or Direct Numerical Simulation: DNS) of Navier-Stokes equations is computationally intensive and expensive for simulations of this kind. As a result, vast majority of …

Changing Perceptions Of China In 1930s America, Erin Pattison

All Theses and Dissertations (ETDs)

No abstract provided.

Foot Deformity And Bone Strength In Charcot Neuropathic Osteoarthropathy, David Joseph Gutekunst

All Theses and Dissertations (ETDs)

Charcot neuropathic osteoarthropathy: CN) is characterized by progressive degradation of bones and joints in a denervated, inflamed foot and ankle. Diabetes mellitus: DM) and peripheral neuropathy: PN) are the most common precursors of CN, which can lead to pedal fracture, subluxation, and dislocation. Bone injury and subtle articular damage characteristic of incipient CN are difficult to visualize with planar radiographs. As a result, CN often progresses until more serious, clinically obvious events occur, contributing to increased risk of ulceration, infection, amputation, and death.

The overall purpose of this research was to develop methods using volumetric quantitative computed tomography: vQCT) to …

The Impact Of Biomass Fuels On Flame Structure And Pollutant Formation During Biomass Cofiring Combustion, Melissa Lauren Holtmeyer

All Theses and Dissertations (ETDs)

Cofiring of biomass in pulverized coal boilers for large-scale power generation requires that current combustion standards of stability, reliability, emission and fuel conversion efficiency are maintained and/or improved. While the properties of biomass fuels are highly variable and can differ significantly from that of coal, in general biomass fuels have greater volatile matter content and larger particle size. The larger size is due to both fuel preparation methods as well as the physical properties of the biomass material. These two characteristics significantly impact the structure of the volatile flame, which is the zone dominated by the combustion of volatiles in …

Natural Killer Cell Recruitment And Activation Following Orthopoxviral Infection, Melissa Anne Pak-Wittel

All Theses and Dissertations (ETDs)

The orthopoxviridae are large, complex DNA viruses with important historical and clinical significance. Members of this genus encode numerous proteins known to subvert the immune response to infection, providing a useful system to probe required host responses for resistance and survival. Natural killer: NK) cells provide an essential innate response to infection through direct lysis of infected cells and cytokine production. The innate anti-viral response following infection is associated with NK cell population expansion in draining LNs, where they are normally a rare population. We have identified mechanisms underlying NK cell expansion following orthopoxviral infection and have examined viral inhibition …

Redox Reactions Influencing Lead Concentrations In Drinking Water: Formation And Dissolution Of Lead(Iv) Oxide And Impact Of Galvanic Corrosion, Yin Wang

All Theses and Dissertations (ETDs)

Two approaches have been used to mitigate lead release to drinking water are optimizing water chemistry to form stable lead corrosion products and replacing lead service lines with lead-free materials. The present study investigated the effects of water chemistry on the formation and dissolution of the lead corrosion product lead(IV) oxide: PbO2). The impact of galvanic corrosion on lead release following simulated partial lead service line replacements: PLSLRs) was also determined.

The extent and identity of PbO2 formation was determined as a function of pH, the presence of dissolved inorganic carbon: DIC), and free chlorine concentrations with different lead(II) starting …

Multi-Contrast Photoacoustic Microscopy, Junjie Yao

All Theses and Dissertations (ETDs)

Photoacoustic microscopy is a hybrid imaging modality with high spatial resolution, moderate imaging depth, excellent imaging contrast and functional imaging capability. Taking full advantage of this powerful weapon, we have investigated different anatomical, functional, flow dynamic and metabolic parameter measurements using photoacoustic microscopy. Specifically, Evans-blue dye was used to enhance photoacoustic microscopy of capillaries; label-free transverse and axial blood flow was measured based on bandwidth broadening and time shift of the photoacoustic signals; metabolic rate of oxygen was quantified in vivo from all the five parameters measured by photoacoustic microcopy; whole cross-sectional imaging of small intestine was achieved on a …

Patterns Of Seasonal Variation In Diet, Abundance, And Movement Of The Scarlet Macaw (Ara Macao) In Southern Belize, Mark Stephen Mcreynolds

Antioch University Dissertations & Theses

This study was conducted in 2008 and 2009 to determine if Scarlet Macaws (Ara macao), in subtropical southern Belize, Central America, are seasonal and elevational migrants and if their movement is influenced by seasonally abundant food. Reports from southern Belize indicated strongly seasonal sightings of macaws (N ≈ 200) in two separate areas of considerable difference in elevation. I monitored plant phenology plots (2 m x 500 m) in low (N = 6) and high (N = 6) elevation areas for a year to compare fruit abundance with macaw sightings in point counts on the plots and nearby. My point …

Life In The Uncanny Valley: Workplace Issues For Knowledge Workers On The Autism Spectrum, Christina H. Rebholz

Antioch University Dissertations & Theses

Many journal articles about autism spectrum disorders have been published. The definition of “high-functioning autism” used in these papers may need to be reconsidered, as a segment of the population may be more skilled than has been historically thought. A percentage of people on the autism spectrum work in a high-paying professional capacity, in industries such as computer technology and health care. Their intellectual capacities allow them to successfully perform the portions of their jobs that require deep technical knowledge. However, they struggle with the cognitive and social issues associated with the autism spectrum, such as: concrete thinking; literal information …

Physical Restraints In Residential Facilities: Staff Members’ Perspectives, Mary Beth Ledoux

Antioch University Dissertations & Theses

The use of physical restraints among children and adolescents in residential facilities is a controversial and emotional topic, especially since children are four times more likely than adults to be restrained in a residential setting. In this study, staff members who have restrained children and adolescents in a residential facility completed a 20-question online survey. The intent of the study was to get a clearer picture of residential workers’ thoughts, feelings, and perceptions toward restraints as well as their views on how effective they deem their restraint training to be. The information gathered from their answers can be helpful for …

The Effects Of The Holocaust For Six Polish Catholic Survivors And Their Descendants, Kristen M. Montague

Antioch University Dissertations & Theses

It is now well known that six million Jews, 220,000 Roma, 250,000 disabled persons, and thousands of Homosexuals and Jehovah’s witnesses were murdered in the Holocaust. It is less understood that due to their ethnic identity that approximately, 1. 9 million Polish Catholic citizens were murdered during the Holocaust and that 1.7 million Polish non-Jews were imprisoned in concentration camps in Siberia, 2.0 million were deported as forced laborers for the German Reich and 100,000 were killed in Auschwitz. To date, there are no studies within Western psychology that address the effects of the Holocaust for this population and/or their …

Conceptualizations Of Wisdom In The Native American Community, Lamar Smith

Antioch University Dissertations & Theses

This qualitative study examined implicit theories of wisdom in a sample of adult individuals who identified as Native American. The research question focused on definitions of wisdom as they exist in the Native American Community. A total of eight participants were asked to answer the question “What is wisdom and how does one become wise?”. Interviews approximately 60 minutes in length revealed several themes in participant’s conceptualizations of wisdom. The study revealed that participants believed wisdom to be based on fundamental building blocks of a worldview of interconnectedness, a collectivist social structure, and an individual value system promoting of personal …

Fatherhood And A Partner's Postpartum Depression: Coping, Relationship Satisfaction, Gender Roles, And Empathy, Martha G. Ruiz

Antioch University Dissertations & Theses

The present study focused on assessing differences in new father’s coping styles when living with a partner suffering from symptoms of postpartum depression. It further investigated whether a relationship existed between father’s coping style and their level of relationship satisfaction, empathy, and views on gender. Five fathers, between the ages of 27 and 46 volunteered their participation in this study. Fathers were recruited through their partners from medical and mental health clinics and agencies offering services to new mothers or mothers suffering from symptoms of postpartum depression. The Coping Responses Inventory (CRI) was utilized to determine if differences existed in …

Family Value Transition In A Changing Turkey, Yudum Akyil

Antioch University Dissertations & Theses

This dissertation consists of two articles. The first article presented is a literature review written to identify and review studies of intergenerational value transmission and social change. The main outcomes fell into five subsections (a) culture and values (b) social change and values, (c) continuing and changing values in Turkey, (d) parent-adolescent relationship adaptation to social change, and (e) implication for clinicians working with changing families. Overall, the literature review illustrated the complexity of value transmission process for families in rapidly changing societies and the need for more understanding of those families' experiences for the clinicians. The second article extends …

Formative Research And Community Resilience: A Case Of Under Addressed Youth Problem Gambling, Michea Caye

Antioch University Dissertations & Theses

The overarching research topic for this study is the issue of effectively engaging and informing community and government decision makers about health issues that can negatively impact a community's resilience. The question guiding this study is how can formative research engage and inform community and government decision makers about the under addressed issue of youth problem gambling (YPG) in Windham County, Vermont? The study has two aims: 1) to develop a formative research conceptual framework and evaluate its effectiveness in addressing the public health issue of youth problem gambling, and 2) to use the formative research methodology to develop a …

Explainers' Development Of Science-Learner Identities Through Participation In A Community Of Practice, Anne E. Richardson

Antioch University Dissertations & Theses

The urgent environmental issues of today require science-literate adults to engage in business and political decisions to create solutions. Despite the need, few adults have the knowledge and skills of science literacy. This doctoral dissertation is an analytical case study examining the science-learner identity development of Exploratorium Field Trip Explainers. Located in San Francisco, CA, the Exploratorium is a museum of science, art, and human perception dedicated to nurturing curiosity and exploration. Data collected included semi-structured interviews with sixteen former Field Trip Explainers, participant observation of the current Field Trip Explainer Program, and review of relevant documentation. Data analysis employed …

Passageworks: The Impact Of A Social-Emotional And Spiritual Learning Program Among Adolescents, Randi Hirschberg

Antioch University Dissertations & Theses

Adolescence is a crucial developmental period in one's life. Unfortunately, our nation's youth are afflicted by high rates of risky behavior and psychiatric disorders that impact their ability for a successful future. Research indicates that school-based preventative social-emotional learning (SEL) programs can play a large role in improving the lives of adolescents. Despite this, few documented SEL program evaluations have examined their applicability to the fast growing Latino population. Latinos have been identified as more vulnerable to the problems among our youth than any other group. Identifying SEL programs that hold potential for decreasing these vulnerabilities is critical. Additionally, SEL …

An Alcohol Intervention Model With College Students: Effectiveness Of The Basics Program, Francisco Gil-Del-Real

Antioch University Dissertations & Theses

The Brief Alcohol Screening and Intervention for College Students (BASICS) program was designed at the University of Washington to provide treatment for high-risk drinkers in the college population. This program was evaluated in 2002 as a part of the National Institute on Alcohol Abuse and Alcoholism (NIAAA, 2002) report on college drinking. However, this evaluation was based exclusively on a narrative review of the available intervention literature. The purpose of the present study was to conduct meta-analyses on select empirical literature related to the efficacy of the BASICS program in order to serve as a complement to the already extant …

Clinical Implications Of Wearing A Scarlet Letter: Sex Offender Public Policy, Tracy E. Shannon

Antioch University Dissertations & Theses

This dissertation outlines a mixed methods research approach to evaluate the clinical implications of sex offender public policies. Background information is given regarding current public policy on sex offender civil commitment and community notification and registration, the development of public policy and the current ramifications of the Sex Offender Registration Act (SORNA), the etiology and construction of the definition of sex offenders, and a review of sex offender interventions and their impact on therapeutic outcomes. This study examines the therapeutic and anti-therapeutic effects of SORNA using a therapeutic jurisprudence framework. A discussion of the correlation between mental health symptoms and …

Heart To Heart: A Cardiac Rehabilitation Follow-Up Program, Tamara H. Bisbee

Antioch University Dissertations & Theses

This dissertation describes a tele-health follow-up program designed to attend to the problem of noncompliance in the process of health-behavior change after formal Cardiac Rehabilitation treatment at a southern New Hampshire community hospital. Cardiac Rehabilitation treatment encompassing lifestyle behavior change is associated with a significant reduction in morbidity and mortality in individuals with Coronary Heart Disease. However, evidence that adherence to lifestyle behavior change recommendations diminishes significantly within six months of treatment suggests that noncompliance is a significant barrier to the secondary prevention of a disease with prodigious consequences. Accumulating evidence that Cardiac Rehabilitation treatment encompassing extended duration of contact …

How Managed Behavioral Health Care Impacts Psychotherapeutic Practices, Beth S. Abramson

Antioch University Dissertations & Theses

The cost of health and mental health care is a growing problem for the United States. Managed care evolved as a way to continue providing quality services in a cost-effective fashion. In the mental health field, some individuals believe managed care reduces the quality of treatment. This exploratory study investigates current sentiments among mental health clinicians regarding managed care’s impact on mental health treatment and looks at how clinicians practice in light of managed care’s guidelines for treating patients. This study explores the current impact of managed care compared with managed care’s first detectable impact in the 1980s.

Is Suicide Training Sufficient For Psychology Trainees To Respond Appropriately To Suicidal Clients?, Nicole M. Bromley

Antioch University Dissertations & Theses

This study reports the frequency of suicide training for current psychology trainees. Additionally,the research uses the Suicide Intervention Response Inventory - Second Edition (SIRI-2) to assess psychology trainees' ability to respond appropriately to suicidal clients. This study compares scores on the SIRI-2 between participants who are in pre-internship years of training and those currently in internship or having completed internship training. Finally, this study compares SIRI-2 scores between high training, low training, and no-training groups, as well as the scores of no-training versus training groups. Findings indicate no statistically significant difference in SIRI-2 scores between participants early in their programs …

Youth And Community Development Through Rites Of Passage: A Pilot Evaluation Model, Jason R. Emery

Antioch University Dissertations & Theses

This project presents a pilot program evaluation model for measuring the effectiveness of rites of passage strategies for youth and community development. It begins by clarifying the key elements and meaning of modern day, community-based rites of passage experiences for youth transitioning into and through adolescence. An effective rite of passage for adolescence is an intentional and transformative process that increases the youth’s community status while supporting and challenging youth to adopt attitudes, behaviors, and skills for a healthy transition through this developmental period and beyond. Next, the project applies a systems-based program evaluation model (Wasserman, 2010) to a rite …

Therapeutic Riding: Effects On Emotional Well-Being In Adults, Jamie L. Lucas

Antioch University Dissertations & Theses

Therapeutic interventions with horses are increasing and utilized to treat a number of ailments, including psychological ones. Despite the growth of these interventions, there has been little research performed, particularly quantitative, to determine efficacy. One proposed benefit of therapeutic riding, a particular type of intervention involving horses, is that it enhances or improves emotional well-being. This construct has been poorly defined and operationalized in the literature. The current study sought to operationalize and measure emotional well-being using a multidimensional model. Three proposed sub-domains of emotional well-being: positive affect, life satisfaction, and self-esteem were measured in adults prior to and after …

Comparing Static-99 Scores Of Incarcerated White, Black, And Latino Sex Offenders, Michele O. Waldron

Antioch University Dissertations & Theses

Risk assessments contribute to sentencing and parole decisions, and thus are among the highest stakes assessments in the mental health field. The Static-99 has become a standard element of risk assessments for sex offenders, yet its norms and predictive accuracy have been established primarily with Caucasian samples, while the incarcerated population is disproportionately minority. Scoring of the Static-99 depends heavily on history of criminal offenses; if patterns of offenses differ along ethnic lines, the possibility that offense history should be understood to have ethnically-specific predictive validity (that is, the predictive significance of a given factor differs by ethnicity) becomes more …

Perceived Stress And The Buffering Hypothesis Of Perceived Social Support On Facebook, John G. Lynch

Antioch University Dissertations & Theses

Online social networking sites have experienced a surge in popularity since their inception. Serving as a hub for communities of all ages, Web sites such as MySpace, Friendster and Facebook bridge geographic and time limitations and offer their members the opportunity to connect with anyone on the Internet at any time. The growing accessibility of technology for computer-mediated communication, outside of such Web sites offers similar opportunities. Although critics share concern over potential for the loss of intimacy, the possibility for increased levels of perceived social support through limitless networking options should not be overlooked. When we consider the strong …

The Other Child: Health Narratives Of Adults Raised With A Chronically Ill Sibling, Danielle Anna Hughes

Antioch University Dissertations & Theses

The sibling relationship brings with it a powerful experience and unique effects on individual development. Within this paper the personal health narratives of adult siblings who grew up with a chronically ill brother or sister are explored in depth. Using a naturalistic, qualitative paradigm and approach to the research a small sample of participants (N=7) provided in depth, semi-structured interviews geared to explore their experiences growing up with their siblings, and later effects on the development of personal health narratives. Using thematic analysis, a number of themes were identified including: (a) at home: finding out, the early relationship, early environment, …

Hoof Prints For Healing: An Equine-Assisted Therapy Program For A Unique School, Alison M. Roy

Antioch University Dissertations & Theses

The unique and meaningful relationship that can develop between humans and horses has been well documented for centuries. More recently a hypothesis has emerged that humans can improve self-concept and social competence from having a horse in their lives. To date, few studies have empirically explored this hypothesis. The hypothesized social and emotional benefits of interacting with horses have inspired Equine-Assisted Therapy (EAT) programs which utilize horses in goal-directed treatment. EAT programs have been shown to be especially effective for socially and emotionally disadvantaged children and youth. In the current project, the author created an EAT program for the socially …