Digital Commons Network^™

Investigation Of Novel Thiol "Click" Reactions, Justin William Chan

Dissertations

The thio-Michael addition reaction is traditionally considered a base catalyzed reaction which involves high catalyst concentrations and long reaction times. This reaction utilizes potent, simple nucleophiles to catalyze the reaction, decreases the catalyst concentration and greatly increases the reaction times. The free radical mediated thiol-ene click reaction uses light or heat and an initiator to catalyze the rapid and quantitative addition of thiols to most electron rich enes without the formation of side products and in the absence of solvent. Recently, the thiol-ene click reaction has been exploited for these reasons in materials science and organic synthesis. The research herein …

Investigation Of The Relationship Between Polymer Structures And Thermal, Mechanical, Viscoelastic Properties, Ethem Kaya

Dissertations

The research presented in this dissertation involves four distinct areas: physical crosslinking systems, UV curable coatings for enhanced oxygen and carbon dioxide barrier properties, synthesis, and investigation of melting behavior/crystallinity relations of linear polyamides with long alkyl chains, and synthesis and characterization of cyclic diamides as precursors to linear polyamides 6 4.

The physical crosslinking section involves synthesis of monomers and polymers bearing cyclodextrin and adamantane pendent groups, and investigation of non-covalent interactions between these polymers (Chapter II). Two methacrylate monomers bearing cyclodextrin and adamantane were synthesized, and copolymerized with poly(ethylene glycol) methyl ether methacrylate. The specific interaction between copolymers …

Experimental Population Dynamics Of Amyloodiniumocellatum In The Spotted Seatrout, Cynoscion Nebulosus, And The Red Snapper, Lutjanus Campechanus, Ignacio Masson

Dissertations

Amyloodinium ocellatum is a parasitic dinoflagellate that infects warm water marine bony fishes and causes high mortalities in aquaculture settings. It has three life history stages: the feeding trophont, the reproductive tomont, and the infective dinospore. This dissertation describes the characteristics of A. ocellatum infections in juvenile spotted seatrout, Cynoscion nebulosus, and red snapper, Lutjanus campechanus, studies the survival and fecundities of the stages in the life cycle of the parasite and presents a population model for A. ocellatum.

At 25°C and 33 ppt, the peak of trophont detachment occurred on day 2 postinfection in spotted seatrout and day 3 …

Random And Block Copolymers Of Poly(Dodecamethyleneterephthalamide), Theodore Frank Novitsky Jr.

Dissertations

The following dissertation focuses on the synthesis and characterization of poly(dodecamethylene terephthalamide) (PA-12,T) and novel copolymers. Chapter I details the synthesis of PA-12,T homopolymer by melt condensation polymerization. A series of homopolymers with different molecular weights were obtained by adjusting the stoichiometry of the polymerization using 1,12-diaminododecane, terephthalic acid and benzoic acid. End group 13C NMR spectroscopy resonances were obtained by correlating peak intensities with intrinsic viscosity values. From the NMR data, total end group concentrations and molecular weights were determined for each sample. The data exhibited a linear trend when plotting log (IV) versus log (Mn), and previously unknown …

Preparation And Characterization Of Thiol Based Polymeric Materials, Junghwan Shin

Dissertations

The thiol click-type reaction is one of the most efficient chemical processes that can undergo at room temperature in the benign organic solvent providing excellent opportunity in the fabrication of new materials as well as development of new manufacturing processes. Moreover, the versatility of thiol click-type reactions with many different functional groups such as ene, yne, epoxy, isocyanate, and alkyl halide is the important aspect that should be differentiated from the classic azide-alkyne click chemistry. Although, there are tremendous studies on many areas using thiol click-type reactions, the efficiency and utilities for the material applications have been barely explored. Especially, …

Answer Me That, Catherine Davis

Dissertations

This is a collection of five works of short fiction and one creative non-fiction essay.

Simulation, Synthesis, And Characterization Of Hydrogels And Nanocomposite Gels., Kamleshkumar J. Suthar

Dissertations

Stimuli-responsive gels are three-dimensional, cross-linked polymeric materials that undergo large physical change in response to the environmental stimuli, like temperature, pH, electrical potential, and irradiation. Ferrogels are colloidaldispersion of magnetic nanoparticles in the hydrogel network. The magnetic nanoparticles are attached to the polymeric network by different adhesive forces; as a result, it becomes sensitive to the applied magnetic field.

The main objective of this research is the simulation, synthesis, and characterization of the hydrogel and ferrogel. Simulation of the hydrogel response was performed for various environmental stimuli using a multiphysics finite element analysis software, COMSOL. The pH and electrical response …

The Impact Of The Instructional Practices Inventory At An Illinois Middle School, Karen Earhart Gauen

Dissertations

This participatory action research study followed a middle school for two academic years to determine if incorporating the Instructional Practices Inventory (IPI) would increase classroom experiences that engaged students in learning and encouraged deeper, higher-order thinking skills. This study also used student standardized test scores, the Illinois Standards Achievement Test (ISAT) and Northwest Evaluation Association Measures of Academic Progress (NWEA MAP), to determine if there was a relationship between the IPI process and improved test scores. I worked as the IPI coder, researcher, and facilitator for this study. During the research study, I kept field notes and observational data. Utilizing …

Exploring The Efficiency And Effectiveness Of Teacher Selection Tools: The Effects On The Total Group With A Focus On The Gender Sub-Groups, Sharon Lynn Ellerbrook

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 …

Exploring The Efficiency And Effectiveness Of Teacher Selection Tools: The Effects On The Total Group With A Focus On Elementary And Secondary Sub-Groups, Gregory Matthew Cicotte

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 current 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 highly-qualified teachers. The researcher’s purpose in this study 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 …

Impact Of Missouri Reading Initiative On Student Achievement: An Administrative Perspective, Timothy E. Jamieson

Dissertations

Reading and critical thinking skills are a source of concern when analyzing student achievement relative to No Child Left Behind (NCLB). In Fort Zumwalt, middle school Missouri Assessment Program (MAP) test scores in communication arts have not consistently met NCLB requirements. To address this concern, Fort Zumwalt implemented Missouri Reading Initiative (MRI) as a pilot at North Middle School during the 2007-08 school year. Collaborative researchers collected data derived from student test scores on the 2006-07 and 2007-08 communication arts MAP to assess MRI effectiveness. Quantitatively, this study examined the relationship between implementation of MRI and student achievement on the …

A Comparison Of Three Computational Procedures For Solving The Number Of Factors Problem In Exploratory Factor Analysis, Adam Vincent Piccone

Dissertations

Three computational solutions to the number of factors problem were investigated over a wide variety of typical psychometric situations using Monte Carlo simulated population matrices with known characteristics. The standard error scree, the minimum average partials test, and the technique of parallel analysis were evaluated head-to-head for accuracy. The question of using principal components-based eigenvalues versus common factors-based eigenvalues in the analyses was also investigated. As a benchmark, the commonly used eigenvalues-greater-than-one criterion was included. Across all conditions, the principal components-based version of parallel analysis was found to most accurately recover dimensionality using sample correlation matrices drawn from populations with …

Improving Academic Achievement At A Greater Rate With Increased Instructional Time For Students Who Qualify For Free And Reduced Lunch, Jeffrey Steven Beiswinger

Dissertations

Great demands are placed on educators to meet student academic standards as set forth by No Child Left Behind legislation. To meet these expectations, school districts must consider instructional strategies that maximize learning time. The study school, located in Midwest Missouri, implemented Start on Time, a tardy reduction program at the beginning of the 2006/2007 school year. The intent of the Start on Time program was to reduce tardies, thereby reducing interruptions to instruction while providing support strategies so students arrive prepared. The purpose of this study was to determine if increased instructional time would increase academic achievement and academic …

Impact Of Missouri Reading Initiative On Student Achievement, Teacher Attitudes, And Perceptions, Katherine R. Kimsey

Dissertations

Reading and critical thinking skills are sources of concern when analyzing student achievement relative to No Child Left Behind (NCLB). In Fort Zumwalt, middle school Missouri Assessment Program (MAP) test scores in communication arts have not consistently met NCLB requirements. To address this concern, Fort Zumwalt implemented Missouri Reading Initiative (MRI) as a pilot at North Middle School during the 2007-08 school year. Collaborative researchers collected data derived from student test scores on the 2006-07 and 2007-08 communication arts MAP to assess MRI effectiveness. Quantitatively, this study examined the relationship between implementation of MRI and student achievement on the communication …

Examining Classroom Grades As A Predictor Of Student Achievement On A Criterion- Referenced Test: Telling The Truth, Phillip David Kennedy

Dissertations

American education has made many attempts to reform its structure during the last several decades. Many of these reform efforts have been prompted by global events that implied American education as inferior to other nations’ educational systems. The 2001 No Child Left Behind Act required schools to examine their curriculum, instructional practices, and assessments. The problem was a concern regarding inconsistencies between classroom grades and student achievement (Missouri Assessment Program scores). Therefore classroom grades may be misrepresenting student achievement to colleges, military, or corporations recruiting high school graduates. The purpose of this study was to explore the relationship between student …

The Program Evaluation Standards Applied For Metaevaluation Purposes: Investigating Interrater Reliabiity And Implications For Use, Lori A. Wingate

Dissertations

Metaevaluation is the evaluation of evaluation. Metaevaluation may focus particular evaluation cases, evaluation systems, or the discipline overall. Leading scholars within the discipline consider metaevaluation to be a professional imperative, demonstrating that evaluation is a reflexive enterprise. Various criteria have been set forth for what constitutes excellence in evaluation. In the context of educational program evaluation, the dominant criteria are the Program Evaluation Standards, developed by the developed by the Joint Committee on Standards for Educational Evaluation.

There has been widespread acceptance and application of the Program Evaluation Standards, and their use is advocated by major organizations and several of …

Application Of Molecular Modeling In The Noncovalent Dispersion Of Carbon Nanomaterials, Praveen Kumar Madasu

Dissertations

Molecular modeling is a powerful tool to better understand the intermolecular interactions of carbon nanostructures. It provides structures and energies not easily obtainable from experiments and predicts properties that can be tested experimentally. Intermolecular interactions play an important role in the aggregation of various carbon nanomaterials. Three molecular modeling studies of carbon nanomaterial dispersions are presented in this dissertation, with an emphasis on illustrating how effective these theoretical techniques are in providing insight on the selection of dispersion additives. To achieve our goals, we employed molecular mechanics based methods, along with semi-empirical methods, and quantum mechanical methods, such as density …

A Pilot Study Of Organizational Performance, Performance Barriers And Faculty Engagement In The Nursing Education Unit, Yolanda Chapman Turner

Dissertations

This pilot study was driven by the problem of market disequilibrium and the subsequent overarching desire to identify and describe principles and processes taken by nursing education units to optimize market equilibrium for nursing service in response to cyclical market demands. Given the complexities of market responsiveness in conjunction with changes in healthcare delivery, health economics, population demographics, higher education and other contextual factors, it is essential for nursing education as a whole to be in a position to respond to demand. The purpose of this study was to investigate organizational performance, performance barriers and faculty engagement in the nursing …

The Advanced Placement And International Baccalaureate Programs: The Graduates' Perspective, Shannon Saxby Smith

Dissertations

This study was designed to solicit the perspectives of AP and IB graduates who have completed at least one semester of postsecondary education about their experiences while in their respective programs. This study was also conducted to determine whether these IB graduates report that they were better prepared for postsecondary studies than students who participated in the AP program. The researcher was also able to determine whether AP and IB graduates believed they experienced any long-term benefits or detriments by having been in their programs and whether they believed their experiences were worthwhile. Lastly, the researcher was able to determine …

The Impact Of Multicultural Trade Books And An Intervention On Fourth Graders' Cultural Attitudes, Susan Herberger Whitcomb

Dissertations

As the United States population has become more diverse and the civil rights movement of the 1960s increased attentiveness to the change in population, the need for multicultural awareness has grown (Perry & Fraser, 1993). This study examined if teacher read alouds of multicultural trade books and a scripted instructional intervention could impact 187 fourth graders' cultural attitudes. The 10-session, 5-week study involved six reading teacher volunteers participating in one of the three group levels (treatment one: multicultural trade book read alouds, treatment two: multicultural trade books and a scripted instructional intervention, and treatment three: a control group). The mixed …

Anomaly Detection Techniques For Ad Hoc Networks, Chaoli Cai

Dissertations

Anomaly detection is an important and indispensable aspect of any computer security mechanism. Ad hoc and mobile networks consist of a number of peer mobile nodes that are capable of communicating with each other absent a fixed infrastructure. Arbitrary node movements and lack of centralized control make them vulnerable to a wide variety of unknown and known attacks from inside as well as from outside. In this dissertation we propose two efficient statistical techniques for anomaly detection for these networks.

In order to take into account incomplete testing samples and the interaction among multiple features, we present BANBAD •- a …

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 …

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.

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 …

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 …