Digital Commons Network^™

Working With Heterosexual Allies On Campus: A Qualitative Exploration Of Experiences Among Lgbt Campus Resource Center Directors, Melissa A. Bullard

Dissertations

The scholarly literature has just recently begun to address the role that heterosexual allies can play in responding to the unique needs and challenges facing LGBT people. As Lesbian, Gay, Bisexual, and Transgender (LGBT) Campus Resource Centers are expanding in number and scope on college and university campuses across the United States, heterosexual allies have increased opportunities to support and advocate for LGBT people. Yet very little is known about what heterosexual allies do, or how their presence and actions impact LGBT people. The purpose of this study is to identify and describe the experiences that LGBT individuals have with …

Health Impacts Of Polychlorinated Biphenyls (Pcbs) In Aquatic Organisms, Marla Ann Fisher

Dissertations

Polychlorinated biphenyls (PCBs) are a major contaminant of global extent in water resources and aquatic biota. Due to its high lipid solubility, PCBs fail to be degraded and, therefore, continue to bioaccumulate throughout the environment and food chain. To determine the impact of PCBs on the immune system ofaged and juvenile Japanese medaka (Oryzias latipes), fish were injected with the coplanar PCB congener 126 and examined after 3 and 14 days. PCB 126 produced oxidative stress in both age groups of fish 14 days post-injection; however, juvenile medaka appeared more susceptible than aged fish. Humoral immunity, as determined by antibody …

Using The History Of Research On Sickle-Cell Anemia To Affect Preservice Teachers’ Conceptions Of The Nature Of Science, Eric M. Howe

Dissertations

Preservice elementary teachers enrolled in an elective biology course participated in an eight-class unit of instruction based on the history of research in understanding the disease sickle-cell anemia. Students were introduced to the disease as a “mystery” for them to solve, and subsequently developed an understanding of the disease from several disciplines in biology (e.g., genetics, ecology, evolution, molecular biology). The unit involved open-ended problems in which students examined evidence and developed explanations in a manner analogous to the reasoning used by Anthony C. Allison and his colleagues during the early to middle part of the twentieth century.

Throughout the …

Studies Of Atomic And Molecular Dynamics Using Photoelectron Spectroscopy, Sophie E. Canton

Dissertations

Photoexcitation and photoionization studies of free atoms and molecules in the gas phase provide a unique view into various aspects of radiation-matter interactions that are used as basic building blocks in many branches of physics, such as Solid State, Plasma Physics, Photochemistry or Astrophysics. With the advent of third generation synchrotron light sources delivering high photon flux (>10¹⁵ photons/s) with unprecedented resolving power over a broad energy range, it has become possible to investigate in great detail not only the internal structure of the targets, but also the dynamics of the process. Born in the 1960s,photoelectron spectroscopy specifically …

Exploring The Behavioral Function Of Work Monitoring, Don H. Rohn

Dissertations

A number of studies have suggested the key difference between effective and ineffective managers is the extent to which managers engage in a particular form of monitoring - work sampling (Komaki & Minnich, 2002). Effective managers observe employees instead of relying on self-reports or secondary sources of performance. A factor contributing to the effectiveness of work sampling may be an increase in desired behavior as a function of reactivity to the presence of an observer. In spite of the large volume of research on the effects of observer presence on various physiological responses and task performances (Guerin, 1993), a study …

Comparative And Contributive Effects Of Process And Human Performance Improvement Strategies, Joseph R. Sasson

Dissertations

Organizational leaders know that the success of their organization depends on the organization's ability to either produce better products or produce equally good products at a lower cost to consumers. Interventions aimed at improving organizational performance stem from two primary perspectives. One perspective emphasizes changing system factors (e.g., equipment and processes) and the other perspective emphasizes changing human performance factors (e.g., performance specifications and behavioral consequences). The current study evaluated the comparative and contributive effects of process improvement techniques (Kock, 1999; Melan, 1992; Rummler & Brache, 1995) and human performance improvement techniques (Daniels, 1989; Gilbert, 1996; Rummler & Brache, 1995), …

Postpartum Fatigue In The Active Duty Military Woman, Jacqueline D. Rychnovsky Phd

Dissertations

Up to 16,000 military women annually experience the birth of a child. Barring complications, regulations require a return to work 42 days postpartum, making them susceptible to the effects of postpartum fatigue. The purpose of this descriptive, longitudinal study of 109 military women was to describe fatigue levels across the first 6–8 weeks postpartum; to describe the relationship among selected psychological, physiological, and situational variables of fatigue; and to examine the relationship between predictor variables, fatigue levels, and performance after childbirth. The majority of the sample were married or partnered enlisted women in the U.S. Navy with a mean age …

The Use Of Computer-Based Programmed Instruction As A Supplemental Tool To Train Behavior Analysis Concepts, Jason T. Otto

Dissertations

The objective of this dissertation was to produce effective computer-based programmed instruction modules to serve as supplemental training for an ongoing college seminar in behavior analysis. Computer-based programmed instruction supplemented a checklist of a strategy for diagramming behavioral contingencies in the first study and supplemented difficult textbook material in the other studies. In all, the instruction involved 31 concepts, rules, or objectives. Microsoft ®PowerPoint® and Macromedia Flash(TM) were the authoring tools used to develop these supplemental modules. The modules involved multiple-choice-branching programming, which students completed as homework assignments that were delivered with a compact disk (Studies 1-4) and the World …

Adaptive Learning For Event Modeling And Pattern Classification, Shuangshuang Dai

Dissertations

It is crucial to detect, characterize and model events of interest in a new propulsion system. As technology advances, the amount of data being generated increases significantly with respect to time. This increase substantially strains our ability to interpret the data at an equivalent rate. It demands efficient methodologies and algorithms in the development of automated event modeling and pattern recognition to detect and characterize events of interest and correlate them to the system performance. The fact that the information required to properly evaluate system performance and health is seldom known in advance further exacerbates this issue.

Event modeling and …

Virtual Teams Combining Mobile Devices With Web-Based Communication On Group Decision Making, Hyo-Joo Han

Dissertations

Organizations have moved from a face-to-face team environment to a virtual team environment using communication technology during the last decade. More and more workers use asynchronous tools (including email, discussion groups, information sharing tools, and group calendaring systems), and synchronous tools, such as instant messaging and web-based chatting features, to coordinate and share information with people within and outside of organizations. This empirical study on how virtual teams work, integrating mobile devices with web-based group communication for decision-making tasks, examines which technologies and communication modes are the best for distributed group teamwork, and, mainly, what are the predictive characteristics making …

Intercity Travel Demand : A Utility-Consistent Simultaneous Trip Generation And Mode Choice Model, Guilin Li

Dissertations

An intercity travel decision includes a complex set of subdecisions, such as when to travel, where to travel, which mode to choose, and others. The main focus of this dissertation is to examine trip frequency and mode choice of intercity non-business travel.

The objective of this study is to understand intercity travel behavior using disaggregate models. The proposed conceptual framework for intercity travel behavior leads to a nested logit/continuous choice model that is rigorously linked to the utility maximization theory. Compared to a traditional intercity travel demand model, the proposed model is utility consistent in that trip generation and mode …

Migration Of An Intruder Particle In A Boundary Driven Shear Flow, Jian Liu

Dissertations

This study reports on three-dimensional, discrete element simulations of a single large spherical intruder in a Couette shear flow composed of uniform sized particles. The simulation results are useful in providing a numerical reproduction of the experiments for size segregation and mixing. This in turn has a major importance in many industries which are concerned with handling of particles and powders, such as pharmaceutical manufacturing, agriculture, chemical and mineral processing.

Discrete element simulations are carried out using the "soft sphere" model of Walton, et. al., which provides a method for obtaining the information at a macroscopic level from multi-body collisions …

Oblivious Data Hiding : A Practical Approach, Husrev T. Sencar

Dissertations

This dissertation presents an in-depth study of oblivious data hiding with the emphasis on quantization based schemes. Three main issues are specifically addressed:

1. Theoretical and practical aspects of embedder-detector design.

2. Performance evaluation, and analysis of performance vs. complexity tradeoffs.

3. Some application specific implementations.

A communications framework based on channel adaptive encoding and channel independent decoding is proposed and interpreted in terms of oblivious data hiding problem. The duality between the suggested encoding-decoding scheme and practical embedding-detection schemes are examined. With this perspective, a formal treatment of the "processing" employed in quantization based hiding methods is presented. In …

Fabrication And Characterization Of Microcrystalline Silicon Solar Cells, Liwei Li

Dissertations

In this study, single junction p-i-n μc-Si:H solar cells were prepared using plasma of silane diluted by hydrogen in a low-cost, single chamber, non-load-locked RF-PECVD system. Direct structural characterization of μc-Si:H solar cells, rather than stand-alone films, was conducted using Raman Spectroscopy, XRD, and AFM. Strong correlations among device deposition, i-layer structural properties, and device performance have been established. With such correlations, critical issues in fabricating low-cost, large-scale, high performance μc-Si:H solar cells were identified.

The critical importance of seeding processes in determining the microstructure of μc-Si:H i-layers and performance of μc-Si:H solar cells has been demonstrated. Using …

High Resolution Solar Observations In The Context Of Space Weather Prediction, Guo Yang

Dissertations

Space weather has a great impact on the Earth and human life. It is important to study and monitor active regions on the solar surface and ultimately to predict space weather based on the Sun's activity. In this study, a system that uses the full power of speckle masking imaging by parallel processing to obtain high-spatial resolution images of the solar surface in near real-time has been developed and built. The application of this system greatly improves the ability to monitor the evolution of solar active regions and to predict the adverse effects of space weather. The data obtained by …

The Impacts Of Delphi Communication Structure On Small And Medium Sized Asynchronous Virtual Teams, Hee-Kyung Cho

Dissertations

The improvement of Internet technology has motivated distributed work groups to collaborate without meeting face to face. Although asynchronous meetings through Web-based group communications systems enable groups dispersed temporarily and geographically to collaborate more flexibly, parallel and non-linear communication among dispersed members also challenge effective and efficient group coordination. Moreover, the Web-based asynchronous meeting is distinguished not only from the face-to-face meeting but also from the synchronous computer-supported meeting in terms of coordination process. However, previous asynchronous group communications or virtual team research focused more on the comparison of this new type of meeting with the face-to-face meeting. Not many …

A Conceptual Framework For Using Feedback Control Within Adaptive Traffic Control Systems, Renu Chhonkar

Dissertations

Existing adaptive traffic control strategies lack an effective evaluation procedure to check the performance of the control plan after implementation. In the absence of an effective evaluation procedure, errors introduced in the system such as inaccurate estimates of arrival flows, are carried forward in time and reduce the efficiency of the traffic flow algorithms as they assess prevalent traffic conditions. It is evident that the feed-forward nature of these systems cannot accurately update the estimated quantities, especially during oversaturated conditions.

This research is an attempt to develop a conceptual framework for the application of feedback control within the basic operation …

Development Of Supercritical Processes For Particle Coating / Encapsulation With Polymers, Yulu Wang

Dissertations

This work presents the investigation of particle coating using supercritical fluid processes as novel coating approaches to coat particles from 20 nanometers to 500 microns with different polymers. Particle coating using different supercritical technologies of a modified rapid expansion of a supercritical solution (RESS) for particle coating and a supereritical antisolvent (SAS) process was described.

In the modified RESS process for particle coating, experiments were performed using a pilot-scale supercritical apparatus, glass beads as host particles and two different polymers as coating materials. By adjusting temperature and pressure, the polymer nucleated and precipitated onto the surface of the host particles …

Statistical Study Of Solar Radio Bursts, Gelu-Marius Nita

Dissertations

The peak flux distribution of 40 years of solar radio burst data recorded by NOAA, as a function of frequency and time over a wide range of frequencies, was investigated to quantify the potential impact of radio bursts on wireless systems. Tables of fit parameters, which can be used to find burst occurrence rates in a number of frequency ranges, are presented. The typical power-law index of number density distribution, -1.8, is similar to that found in many hard X-ray studies. Significant changes were found in power-law index with frequency. The results may be useful for designers of current and …

Personality Measurement In The Prediction Of Positive And Negative Police Officer Performance, Brian P. Enright

Dissertations

Police officer selection research has revealed a number of relationships between scores on psychological tests and performance on the job. Although a few of these predictor scales have been consistently linked with job performance, many still require further investigation. It was proposed that the personality scales most consistently linked to job performance concern two broad constructs including: (1) prosocial personality characteristics, and (2) level of psychological distress. Guided by findings from the police outcomes literature and research regarding the factor structure and intercorrelation of MMPI and CPI scales, it was proposed that Scales 4 and 9 from the MMPI and …

Perceptions Of Board Effectiveness In Selected Institutions Of Higher Education In Zimbabwe, Bonginkosi Zvandasara

Dissertations

Problem

The purpose of this study was to identify the level of board effectiveness in selected private and public universities in Zimbabwe as perceived by board members. Also, the study sought to determine the influence of such demographic variables as age, education level, and years of service on the seven factors of university functioning: institutional mission, institutional planning, physical plant, financial management, board membership, board organization and performance, and board/vice chancellor relations.

Method

The survey method was used to collect data. Respondents were asked to complete a 47-item questionnaire and indicate their level of agreement on each of the questions …

Validating The Substance Abuse Subtle Screening Inventory For Identifying Substance Abuse Among Adolescents In A Residential Treatment Center, Ann Carol Singler

Dissertations

Purpose. This study examines the construct validity of the Substance Abuse Subtle Screening Inventory for Adolescents (SASSI-A) as a substance-abuse screening instrument for dual-diagnosed adolescents in a residential treatment center.

Method. Using archival records of 336 subjects from a long-term residential treatment center, this study applied a two-group comparison method to examine the construct validity of the SASSI-A for screening substance abuse among adolescents in a residential treatment center. Residents were initially clinically assessed by a state certified counselor as either substance abuser/chemically dependent or non-substance abuser/chemically dependent. At this residential treatment center, the clinical assessment included a full review …

The Improv Church : A Qualitative, Theoretical, And Interdisciplinary Explanation Of Its Appeal To Collegians, Karl Haffner

Dissertations

The college years often represent the time when young people drop out of church. The reasons vary. One of the factors in a decision to abandon church is that college students feel many traditional churches are irrelevant. Conventional methods of pedagogy and communication are typically used. The result is a learning environment that feels stale to many young people.

Some educators are experimenting with new methods of instruction based on advances in learning theories, instructional strategies, and in whole-person learning. The purpose of this study was to consider the Improv Church as a learning environment where these advances in education …

How Instructional Leadership Is Addressed In Educational Administration/Leadership Programs, Lolethia Jones Kibble

Dissertations

Problem

Instructional leadership is a major factor in school effectiveness and student achievement, yet it is not widely practiced by school principals. One of the contributing factors, identified in the literature, is a lack of skills and knowledge. Although there is a great deal of information about principal preparation programs, there is very little information on the preparation of school leaders in the practice of instructional leadership behaviors. The purpose of this study was to examine how instructional leadership is addressed in both traditional and restructured educational administration/leadership programs and to what extent this is related to institutional and demographic …

Instructional Implications Of The Michigan Educational Assessment Program As An Accountability Instrument, Daniel J. Applegate

Dissertations

Problem. In Michigan, early elementary school teachers are held accountable for instructional decisions they made based on the number of children who pass the state standardized reading test, the Michigan Educational Assessment Program (MEAP). Although state officials claim the MEAP can inform instruction, no data are regularly collected to describe reading instructional practices or the relationship between current practices and the percentage of students who pass the MEAP.

Method. Using a survey instrument, this study measured the amount of instructional time Kindergarten through Grade 4 teachers reported that they devoted to the development of 19 different components or activities within …

The Stairway To Heaven: A Critique Of The Evangelical Gospel Presentation In North America, Paul Brent Dybdahl

Dissertations

The topic . This study focuses on the so-called "plan of salvation" or "gospel presentation" that evangelical Christians in the United States present to seekers who want to know how to be saved. There are currently three dominant presentations that are widely employed and emulated. The authors of each are well-known: D. James Kennedy, Bill Bright, and Billy Graham.

The major portion of my study involves a two-stage critique of these dominant evangelical gospel presentations: first, from the perspective provided by communication theory, and second, by comparing the presentations of Kennedy, Bright, and Graham with conversion accounts from Luke-Acts. Essentially, …

Adult Esl Oral Reading Fluency And Silent Reading Comprehension, Kristin Lems

Dissertations

A descriptive study of second language adults studying ESL at the beginning, intermediate, and advanced levels in a post-secondary academic program revealed that their oral reading fluency had a significant, low-to-moderate correlation with scores on a measure of silent reading comprehension. The correlation was slightly stronger for measures of accuracy than speed, and strongest for miscue ratio. The correlation increased as proficiency level increased. Among different first language groups, the correlation was highest for Hispanic learners, and lowest for Chinese. Furthermore, all fluency measures correlated better with a listening measure than with the silent reading comprehension measure. When a system …

Determination Of Spatial Strata For Environmental Regulatory Purposes, John Edward Daniels

Dissertations

This dissertation introduces spatial strata modelling, a methodology that combines spatial statistics, cluster analysis, and geographic information system theories to analyze the background level of naturally occurring contaminants of concern (COCs). The objective of spatial strata modelling is to divide a geographic area of interest into mutually exclusive geographic zones (spatial strata): with each stratum representing a different level of COC concentration. An estimate of each stratum's COC concentration level, representing an upper regulatory limit, will also be provided. Data provided by the Michigan Department of Environmental Quality describing the spatial location and arsenic concentrations of 211 Michigan sites (arsenic …

K+- Induced Dilation Of Cremasteric Arterioles Involves Na+/K+Atpase And Inward Rectifier K+ Channels, Wendy Burns

Dissertations

The purpose of this study was to evaluate the possible mechanisms involved in cremasteric arteriolar dilation as a result of increased concentrations of ([K⁺]_o) extracellular potassium. Many other studies suggested that Na⁺/K⁺ ATPase or K_IR channels are responsible for potassium-induced vasodilation in other systems (2, 12, 22, 40, 46, 52, 16, 17, 25, 33, 34, 85, 99, 151). However, these studies show only partial inhibition of dilation as a result of independent blockageof each mechanism. The hypothesis of this study was that both mechanisms contribute to potassium-induced dilation seen in cremasteric arterioles. …

Load Sharing Strategies In Distributed Environments, Laurentiu Cucos

Dissertations

We investigate load sharing strategies in distributed systems based on work properties, environment and process organization. For various classes of problems we characterize the paradigms corresponding to applicable communication strategies. We develop suitable structure for the work, and work assignment techniques in order to maximize the efficiency. This research is based in part on work conducted on distributed numerical integration.