Digital Commons Network^™

Theoretical Study Of Localized Surface Plasmons Of Metal Nanoparticles, Clusters And Embedded Metal Nanoparticles In Matrices, Masoud Shabani Nezhad Navrood

Dissertations

Localized surface plasmons resonances (LSPRs) in metallic nanoparticles (NPs) arise from the interactions between incident light and conduction electrons and have attracted enormous research interest in recent years both for their fundamental nature as well as applications in interdisciplinary areas of sciences such as biological imaging, plasmonic photo-thermal therapy, photovoltaics, and plasmonic sensors. LSPRs are strongly localized and depend on the shape, size, the composition of the NPs, the polarization direction of the incident light, refractive index (RI) of the surrounding medium as well as on the chemical environment that surrounded NPs. Although significant research has progressed both theoretically and …

A Joint Model Of A Longitudinal Process And Informative Time Schedule Data, Michael Bronsert

Dissertations

Longitudinal studies are commonly encountered in a variety of research areas in which the scientific interest is in the pattern of change in a response variable over time. These observations are traditionally scheduled prospectively and therefore common fixed time interval models for repeated measurements are adequate. Conversely, in informative schedule studies in which subsequent observations are scheduled on the basis of prior response outcomes, time between observations now becomes informative in the longitudinal process. Traditional fixed time approaches, however, are unable to utilize the informative nature of the data lessening the inferences achieved by these approaches. Therefore, the purpose of …

Spatial Frequency Localization In Mammograms Using Wavelets, Tomislav Bujanovic

Dissertations

Microcalcifications are residual calcium deposits that are often the first signs of developing breast abnormalities that may lead to breast cancer. Up to 30% of cancerous lesion in diagnosed breast cancer cases could have been detected earlier through mammogram screenings if the right tools were available. While the detection of calcifications may be easier in fatty backgrounds, it is challenging in dense parenchyma, suggesting the need for more sensitive tools for accurately identifying suspicious regions in mammograms and propping a computer-aided system for further target classification. Therefore, the objective of the research work in this dissertation is to develop a …

The Heterosexual Mother-Lesbian Daughter Relationship: Using Consensual Qualitative Research (Cqr) To Understand Perceptions Among Predominately White, Formally Educated Mothers, Julie Meredith Davis

Dissertations

Little research specifically addresses the heterosexual mother-lesbian daughter relationship. Given this, a core research team of six utilized a Consensual Qualitative Research (CQR) approach to gain insight into two broad ideas. The first broad idea was about how heterosexual mothers perceive that their relationship with their lesbian daughters unfolds after the mothers accepted their daughters' minority sexual orientation. The second broad idea was how changes in the heterosexual mothers' values, beliefs, and attitudes (from the mothers' perspectives) influenced their postacceptance relationship with their daughters. The 10 women who agreed to participate in the study were predominately white, formally well-educated, psychologically …

An Evaluation Of A Sexual Assault Education Program, Angela P. Hatcher

Dissertations

Sexually aggressive behavior, especially on college campuses, is an issue of major concern. Previous research has found that 54% of college women report being sexually victimized (Koss, Gidycz, & Wisniewski, 1987). Given the scope of this problem, effective prevention strategies are necessary. Sexual assault prevention programs have included those targeting a mixed gender audience as well as gender specific programs. Research examining the effectiveness of these programs, at both post-intervention and follow-up, have provided mixed results.

The goal of the current study was to examine the effectiveness of a video-based sexual assault education program in decreasing rape myths, increasing victim …

Kendall's Tau And Spearman's Rho For Zero-Inflated Data, Ronald Silva Pimentel

Dissertations

Zero-inflated continuous distributions have positive probability mass at zero in addition to a continuous distribution. Such type of data can be encountered, for example, in medical, environmental and financial research. The main focus of this research is to study the association of nonnegative random variables, both having a positive probability mass at zero. New estimators of the classical measures of association, Kendall's tau and Spearman's rho, appropriate for the zero-inflated distributions, are proposed and their asymptotic distributions are derived. Performance of the estimators is assessed by a Monte Carlo simulation study. New ideas are illustrated by a real data example.

Adoption And Integration Of Best Practice Methods In Secondary English Teaching, Gretchen Rumohr-Voskuil

Dissertations

Commencing with a critical examination of the history and rhetorical force of the term "best practice," this dissertation undertakes a qualitative study of three secondary English teachers, considering their adoption and integration of best practice methods. The subjects, represented by urban, suburban and rural secondary schools, were National Writing Project participants identified as "exemplary teachers" by a NWP site director. "Best practice" methods analyzed included the process model for the teaching of writing and literature, student decision-making, and a low-risk writing environment. Factors that were found to influence the adoption of best practice methods included undergraduate and preservice experiences, intern …

Reactor R&D: Synthesis And Optimization Of Metallic Nitride Fullerenes And The Introduction Of Two New Classes Of Endohedral Metallofullerenes, Metallic Nitride Azafullerenes And Oxo-Metallic Fullerenes, Curtis Earl Coumbe

Dissertations

Metallic nitride fullerenes (MNFs) were discovered in 1999. This class of endohedral fullerenes show promise in a new diverse range of useful applications. Since then, focus has shifted to the selective synthesis of these molecules with yields that would accommodate adequate sample distribution. Using the electric arc method, the traditional yield of these molecules has been very low (i.e. < 5 mg), and only a small percentage of the fullerene products (i.e. < 5%). This dissertation introduces the novel CAPTEAR (Chemically Adjusting Plasma Temperature, Energy, And Reactivity) method that allows the targeted synthesis of MNFs in high purity and yield. This method utilizes a nontraditional oxidizing method for fullerene synthesis that has not only provided optimization of MNFs, but also resulted in the discovery of two new classes of fullerenes: metallic nitride azafullerenes (MNAFs) and oxo-metallic fullerenes (OMFs). Evidence suggests that the nitrogen of the MNAF cage provides stability for the trimetallic nitride clusters, while the OMFs are the first fullerenes to encapsulate oxygen and incorporate a seven atom cluster inside a Cgo cage.

Other efforts to increase yields resulted from scaling up production of fullerenes by using larger quantities of starting materials. These larger quantities required energy (electrical current) beyond the capacity of the traditional electric arc generator. Therefore, a new electric arc generator …

Study Of Thermal Frontal Polymerization Utilizing Reactive And Non-Reactive Additives, Veronika Grace Viner

Dissertations

Thermal frontal polymerization is a process that involves a propagating front travelling through a monomer/initiator solution and converting monomer into polymer. The effects of different reactive and non-reactive additives on front temperature, front velocity, and pot life were studied in a thermal frontal polymerization system of multifunctional acrylates. One issue with thermal frontal polymerization of acrylate monomers is the amount of smoke and fumes produced due to high front temperatures. The effect of thermally-expandable microspheres was studied utilizing a variety of monomers. Solid additives including fillers, inert phase changer materials, and high thermal conductive fillers were investigated. The addition of …

A Molecular Analysis Of Training Multiple Versus Single Manipulations To Establish A Generalized Manipulative Imitation Repertoire, Breanne K. Hartley

Dissertations

This study evaluates the necessity of training multiple versus single manipulativeimitations per object in order to establish generalized manipulative-imitation. Training took place in Croyden Avenue School's Early Childhood Developmental Delay preschool classroom in Kalamazoo, MI. Two groups of 3 children each were trained to imitate in order to determine the most appropriate number of manipulations required (per object) to establish a generalized manipulative-imitation repertoire. Three children received single-manipulations training, and 3 children received multiple-manipulations training. It was anticipated that the multiple-manipulations training group would acquire a greater amount of generalized manipulative-imitation because the training required that the children discriminate between …

Empirical Essays On The Impact Of Health-Aid On Health Outcomes, Elsy Thomas Kizhakethalackal

Dissertations

This dissertation consists of three essays that empirically explore the impact of multilateral health-aid on health outcomes like infant mortality rate (IMR) and incidences of an infectious disease, Tuberculosis, in developing economies. The first essay uses parametric and semiparametric mean regressions (additive and non-additive specifications) to capture the impact of education and health-aid on the IMR, after controlling for other covariates. Both specifications confirm education as an important factor in reducing IMR. However, the effect of health-aid on IMR is not significant. In our additive model, we do see a threshold level of health-aid after which the impacts of health-aid …

Correlates Of Teachers' Job Satisfaction: A Hierarchical Linear Model Study Using 2003-2004 Schools And Staffing Survey, Jeffrey M. Leslie

Dissertations

This study examines the correlates of teachers' job satisfaction. Based on the literature, it proposes that teacher satisfaction is a function of, among others, the following school process variables: (a) school influence, (b) classroom control, (c) student behavior, (d) parental support, (e) staff collegiality, (f) career/working conditions, (g) administrative communication, and (h) administrative support. The research first decomposed the amount of variance attributable to the teacher level and the school level. Since there was a significant amount of variance at the school level, the next step was to determine if and how the above school process variables were associated with …

Important Or Impotent? Radical Right Political Parties And Public Policy In Germany And Austria, Marcella J. Myers

Dissertations

Across Western Europe throughout the 1990s radical right political parties emerged and gained some electoral success. Since that time, particularly in the face of the popularity of the National Front in France and the Freedom Party in Austria, many studies have been conducted examining the voting behavior, party membership and ideologies of these parties, and what the parties mean to democratic governments. Largely unexamined are the effects of radical right political parties on public policy. This study attempts to evaluate the effect of radical right parties on public policy by using a most similar, case study research design, relying heavily …

Understanding The Impact Of The Kalamazoo Promise From The Perspectives Of Parents And Community Group Members, Charles Pearson

Dissertations

The purpose of this study was to uncover the emerging views of parents and community group stakeholders in regards to The Kalamazoo Promise, and what they believed were the important issues that must be understood by implementers of The Promise in order to provide more effective implementation.

The Kalamazoo Promise is a full-tuition scholarship provided to all eligible graduates of the school district. The qualification criteria are simple, and all graduates attending at least the four years of high school are eligible.

A case study was conducted in one representative school in this midsized, urban district. A multiple-phase approach was …

The Collective Voices Of Asian International Doctoral Students In Counseling Psychology In The U.S.: Recommendations For Faculty And Training Programs, Miki Koyama

Dissertations

There is growing interest among scholars to understand the training experiences of international students in applied psychology. Few empirical studies have specifically investigated international doctoral students in counseling psychology. The purpose of the present study was to create an opportunity for the voices of Asian international students in U.S. doctoral counseling psychology programs could be expressed, and to convey their collective voices.

Twelve Asian international students, predominately women from East Asia, participated in two phone interviews. Participants were asked to illustrate their overall training experiences, share helpful and unhelpful aspects of their training, and identify recommendations for faculty and training …

A Two-Sample Adaptive Procedure Based On The Log-Rank And Peto And Peto's Wilcoxon Tests, Annie A. Tordilla

Dissertations

It has been shown that under a location-scale model y = μ + βz + σε at where y is right censored, the Log-Rank test is asymptotically efficient for the Extreme minimum value error distribution while Peto and Peto's Wilcoxon test is asymptotically efficient for the Logistic error distribution. We propose a two-sample adaptive test, which first selects between Extreme minimum value and Logistic error distribution as to which is a better fit to the data, then performs the asymptotically efficient test (Log-Rank or Peto and Peto's Wilcoxon test) for the selected distribution. The performance of the adaptive test is …

Validating The Attitudes Toward Sex Offenders Scale, Charmeka. Whitehead

Dissertations

This study investigated the reliability and validity of the Attitudes Toward Sex Offenders Scale (ATS) measurement by assessing attitudes of counselors in training towards juvenile sex offenders. The specific aims of this study were to determine (a) internal consistency of the ATS, (b) construct validity of the ATS based on exploratory factor analysis, and (c) the degree to which this instrument has convergent and discriminate validity. The intellectual merit of this study was to provide appropriate scale validation of the ATS so that it might be used to assess attitudes of mental health professionals who work with juvenile sex offenders. …

Three Essays On Foreign Aid, Poverty And Growth., Aberra Senbeta

Dissertations

This dissertation studies how foreign aid impacts poverty and economic growth and addresses three interrelated issues: whether aid reduces poverty, how aid affects economic growth, and whether the poverty mitigating role of aid depends on the levels of poverty.

The first essay, "Does Foreign Aid Reduce Poverty?" examines the direct effects of foreign aid on poverty in developing countries using dynamic panel estimation techniques. The results suggest that aid has a significant poverty reducing effect even after controlling for average income. The findings are robust to model specification and estimation techniques. The policy implication is that poverty reduction can be …

The Ethnic Identity Of Returning Immigrants To A Pueblo In Yucatan, David Piacenti

Dissertations

This study seeks to understand: 1) motivations for leaving and, if applicable, racialized, segregated environment, which is represented by the returned cholo, whose "urban gangbanger" mentality confronts the traditional, rural ethnic identity. San Francisco also affects the overall perception of immigration and desire for permanent U.S. residence. Of the San Francisco cohort, 42% say immigration is "positive overall." Conversely, 62% of the Kalamazoo cohort says that immigration is "positive overall." Only 29% of the San Francisco cohort desire permanent residence in the U.S. while 54% of the Kalamazoo cohort desire permanent U.S. residence. Therefore, the suburban context of Kalamazoo may …

Role Of Residence Hall Staff In Offering Early Warning Academic Intervention, Jon L. Shaffer

Dissertations

Despite anecdotal evidence that residence hall staff are involved in the intrusive delivery of early warning academic intervention programs, little literature exists that defines these programs or the role of residence life staff in their delivery. Understanding the existence of such programs and the involvement of residence life staff is important in developing collaborative efforts between student and academic affairs aimed at promoting student success.

A national on-line survey of senior housing officers was utilized in this research. Results identified that early warning programs existed at 187 (67.3%) of the 278 responding institutions. Of those, 119 institutions (63.6%) utilized residence …

A Mixed Method Study Of Factors Associated With The Academic Achievement Of Latina/O College Students From Predominantly Mexican American Backgrounds: A Strengths-Based Approach, Laura Lara

Dissertations

Young adults from Latina/o backgrounds draw from cultural assets and wrestle with distinctive challenges as they enter into, study at, and graduate from institutions of higher education. In this investigation, I examined the perspectives of Latina/o college students with low and high academic achievement, focusing on their upbringing within families and their identification with their cultural heritage. A sequential mixed method study was implemented and the study was grounded in Margaret Spencer’s PVEST framework (1995, 2006), the development of ethnic identity (Umaña-Taylor, Yazedjian, & Bámaca-Gómez, 2004), and factors associated with the academic achievement of students from Latina/o backgrounds. Results suggest …

The Implementation Of Interventions And Strategies For Children Who Struggle With Reading Utilizing The Read 180 Program, Rebecca Josephine Haag Guyne

Dissertations

All children can learn if given the opportunity, correct assistance, and appropriate instruction. Finding the learning tools which will enhance and encourage learning is the ultimate way to make certain that all students can and will learn. Many teachers use their gut instinct to determine the interventions and strategies to present in their classroom. Improvement will only occur for teachers and students when best practice or research based interventions and strategies are not only accessible but utilized correctly on a daily basis. Children with reading disabilities find fluency and reading comprehension a challenge. The most effective method reported in the …

Can We Get Nurses To Stay? A Qualitative Study To Evaluate The Effectiveness Of A Formal Mentoring Program In An Acute Care Health System, Eileen M. Willits

Dissertations

This qualitative phenomenological case study was designed to investigate the affect that a formal mentoring program had on job satisfaction including a nurse's intent to stay with their current employer and their intent to stay in the nursing profession. The research was intended to determine whether mentoring programs could be used to help avoid the affect of the upcoming predicted nursing shortage in the acute care hospital.

The findings were based on the results of a sample of twelve nurses who had voluntarily signed up to take part in a formal mentoring program sponsored by the staff development department of …

Exploring The Efficiency And Effectiveness Of Teacher Selection Tools: The Effects On The Total Group With A Focus On The Experience Sub-Groups, Kimberly Joyce Mckinley

Dissertations

As schools struggle to meet federal testing requirements, the importance of having highly effective teachers in every classroom has never been greater, and, given the downward trend in the economy, there are more teaching applicants than ever. School districts would benefit from a streamlined process to interview and select only the most effective and highly-qualified teachers. The researcher’s purpose was to determine the efficiency and effectiveness of a unique and specific teacher selection process which included three Ventures for Excellence screening tools and one innovative instrument designed for this study, the performance rating scale. A collaborative correlational study involving three …

Comparing Indigenous And External Teachers: Beliefs, Origins Of Beliefs, And Expectations, Richard H. Fowler

Dissertations

This phenomenology examines rural economically poor school teachers' beliefs, belief origins, and their expectations of and for their students. Data analysis employed two lenses. The proposed lens examined participants as either indigenous or external utilizing Banks' (2001) cross-cultural teaching experiences. In this study, the indigenous participants experienced childhoods in poor rural towns, while external participants experienced childhoods in urban/suburban areas. A second emergent lens examined participants as experiencing working-class or middle-class childhoods. Findings utilizing lens one were mixed and varied with no definitive pattern. The emergent lens utilizing economic class of participants' childhoods found a number of consistent differences between …

Child Care Centers On Higher Education Campuses: Director Perceptions Of Internal And External Roles And Director Leadership, Kerisa A. Myers

Dissertations

An increasing focus on early childhood education and brain research offers a prime opportunity for higher education institutions to research and formulate thought concerning quality child care. Currently, there is limited research examining the impact and roles of child care centers on university campuses. To add to the base of knowledge, this nationally-focused study examined the following broad question: "what value do campus child care centers offer to a given higher education institution and its surrounding community, especially from a center director's perspective?"

An on-line survey was sent to over 400 campus child care directors at two- and four-year public …

Neon Allegiance, Jason Paul Olsen

Dissertations

This collection of thirty-one poems is built around my personal search for place, the idea of "home," and how it is relationship more than mere geography that defines the places one encounters in a life. In these poems, that idea of "home" ties back to intimate relationships with family and friends, but also with relationships involving culture—both historical and popular—as a whole.

The collection itself is a pastiche of strategies and stylizations, united by a defined and consistent voice. The geographic locations vary—from Las Vegas (where the largest number of poems and energy are focused) to stops in points across …

Metaevaluation Of Hiv/Aids Prevention Intervention Evaluations In Sub Saharan Africa With A Specific Emphasis On Implications For Women And Girls, Tererai Mafukidze Trent

Dissertations

Despite numerous attempts by international agencies to halt the spread of Human Immunodeficiency Virus (HIV) and Acquired Immunodeficiency Syndrome (AIDS), nowhere has the impact of HIV/AIDS been felt more acutely than among women and girls in Sub-Saharan Africa (SSA). SSA women account for 59% of adults over the age of 15 living with HIV/AIDS and 76% of those 15-24 who are infected (United Nations Joint Programme on HIV/AIDS [UNAIDS], 2007).

The evidence on gender disparities in infection rates is indisputable; there is an urgent need to identify what is missing in HIV/AIDS prevention interventions: What is the evidence based upon …

Is Parenting Style Related To Overweight In Mexican Or Mexican-American Preschoolers?, Darlene Mcpherson-Ventura Phd

Dissertations

The prevalence of childhood overweight (OW) continues to rise and children from low-income, Mexican or Mexican-American families are disproportionately affected. The preschool years have been identified as a critical period for excessive weight gain and during this time children respond to parental cues as they form their early eating habits. Certain parenting styles have been associated with improved health outcomes in children. The purpose of this study was to evaluate the relationship of parenting styles and feeding practices to the Mexican or Mexican-American preschool child's risk of overweight. Interdependence Theory was used to inform this study to understand the interaction …

Impact Of Preschool Education On Reading Achievement Of Kindergarten Through Fifth Grade Students, Melissa Harvey Clark

Dissertations

This study examines the impact of various types of preschool care and education on the reading achievement of children, kindergarten through fifth grade, who participated in the Early Childhood Longitudinal Study-Kindergarten Class of 1998-99 (ECLS-K). The participants in this study are located throughout the United States of America. These students attend public and private schools.

The data for this study were provided by the National Center of Education Statistics (NCES), a division of the U.S. Department of Education. The researcher utilized ECLS-K's Public Use Data File and Electronic Codebook to create an SPSS syntax file in order to determine if …