Digital Commons Network^™

Selective Removal Of Nox From Catalytic Cracking Regenerator Effluent Using Wet Scrubbing With Aqueous Sodium Chlorite Solutions, Pin Gu

Dissertations

In most refineries, the flue gas from the regenerator in the fluid catalytic cracking (FCC) unit represents a key source of NOx, SOx, particulate, and CO emissions. Wet scrubbing systems have been used with great success to control particulate and SOx emissions from typical FCC regenerator flue gas. Development of relatively inexpensive and safe additives that can be used in existing scrubbing systems to oxidize and absorb NOx is important in order to increase the industrial options to meet the provisions of the Clean Air Act and recently proposed EPA rules. This paper explores the feasibility of removing NOx from …

Measurement Of The Nonlinear Refractive Index (N2) And Stimulated Raman Scattering In Optical Fibers As A Function Of Germania Content, Using The Photorefractive Beam Coupling Technique, Ferdinand Anayo Oguama

Dissertations

One of the greatest challenges in optical communication is the understanding and control of optical fiber nonlinearities. While these nonlinearites limit the power handling capacity of optical fibers and can cause noise, signal distortion and cross talk in optically amplified transmission systems, they have been equally harnessed for the development of new generations of optical amplifiers and tunable laser sources. The two prominent parameters that characterize the nonlinear properties of an optical fiber are the nonlinear refractive index n₂ and the Raman gain coefficient g_R. These parameters are related to the third order nonlinear susceptibility [x^{(3) …}

Thermochemistry And Kinetics In Pyrolysis And Oxidation Reaction Of Oxygenate Chlorocarbons, Neopentane, And Ortho-Xylene, Hongyan Sun

Dissertations

Thermochemical properties of chlorinated alcohols, chlorinated hydroperoxides and corresponding alkoxy, hydroxy alkyl radicals, peroxy and hydroperoxy alkyl radicals are determined by ab initlo and density functional calculations for modeling and optimization of complex chemical processes for combustion or incineration of chlorinated hydrocarbons. The entropy and heat capacities from vibrational, translational, and external rotational contributions are calculated by statistical mechanics, and the hindered rotational contributions to S^°₂₉₈ and C_p(T)'s are calculated by using direct integration over energy levels of the internal rotational potentials. The values of ΔH_f^°₂₉₈ are determined using isodesmic reactions …

Design And Evaluation Of A List Gathering Tool In A Web-Based Collaborative Environment, Yuanqiong Wang

Dissertations

This research focuses on how to build a "list" structure to combine individual items of information into some sort of structure that converts the individual items of information into a structure of knowledge relative to the problem. Software was designed to provide relationships among and comparisons of the contributions in a "list" structure, so that individual members of a group process will be able to understand the contributions of information made by the group as a whole.

A List Gathering Tool was designed and implemented, which is one component in a Web-based Social Decision Support System (SDSS) Toolkit. Then, a …

Design And Evaluation Of A Voting Tool In A Collaborative Environment, Zheng Li

Dissertations

This dissertation researchdesigned, implemented, and evaluated a Web-based Dynamic Voting Toolfor small group decision-making in a collaborative environment.

In this dissertation, theliterature on voting tools in current GDSS research is presented. Variousvoting theories and methods are analyzed, and the advantages and weaknessesare compared, so as to gain a better understanding of how to apply thesedifferent voting methods to diverse decision-making situations. A briefoverview of scaling theories is also given, with an emphasis on Thurstone'sLaw.

The basic features of someweb-based voting tool implementations are reviewed along with a discussionof the pros and cons of Intemet voting. A discussion of Human DynamicVoting …

Understanding The Origins Of Metastability In Thin Film Growth; Tantalum And The Early Group Vb-Vib Metals, Neme Okechukwu Nnolim

Dissertations

Tantalum (Ta) is a metal that is highly prized for its applications in a variety of industries, including the microelectronics industry, where it is largely used in thin film modifications in order to achieve various electronic, magnetic and structural capabilities in solid-state devices. Ta frequently forms metastable phases, including the well-known ß-phase, during the preparation of thin Ta films by standard film deposition methods such as sputtering and electro-deposition. In order to gain insight into Ta metastable phase formation, the Bain transformation mechanism is studied for Ta and the neighboring body centered cubic (bcc) transition metals in Groups 5 and …

Performance Evaluation For Communication Systems With Receive Diversity And Interference, Debang Lao

Dissertations

Optimum combining (OC) is a well-known coherent detection technique used to combat fading and suppress cochannel interference. In this dissertation, expressions are developed to evaluate the error probability of OC for systems with multiple interferers and multiple receiving branches. Three approaches are taken to derive the expressions. The first one starts from the decision metrics of OC. It facilitates obtaining closed-form expressions for binary phase-shift keying modulation. The second approach utilizes the moment generating function of the output signal to interference plus noise ratio (SINR) and results in expressions for symbol and bit error probability for multiple phaseshift keying modulation. …

Method For Theoretically Determining The Locus And Location Of The Transmission Zeros In Microwave Filter Networks, Keehong Um

Dissertations

This dissertation presents a theoretical investigation of a practical method to determine quantitatively the locations and loci of complex transmission zeros (TZ's) of positively and negatively cross-coupled RF or microwave bandpass filter networks.

Bandpass filters can be effectively designed by adjusting the locations of TZ's in the complex s-domain. To locate TZ's, this practical method uses chain matrices for subsystems (discrete parts of the network) of the filter network, and can be extended to other types of filters with cross-coupled sections.

An important result is that a complex doublet, triplet and/or quadruplet, (one-, two-, or four-pairs) of TZ's are shown …

Identifying Behavioral Risk Factors For Acquaintance Rape In College Females, Sherrie Maher

Dissertations

In the current study, a videotaped scenario was used to assess sexual communication skills among a sample of undergraduate women. The study was designed to identify specific communication strategies that may serve as risk or protective factors in acquaintance rape situations. Given that women with a prior sexual victimization history are at increased risk for subsequent sexual assault, the study examined whether these women exhibit particular communication skills deficits in dating situations. Using a validated videotaped vignette, 47 undergraduate women without a history of victimization (NVP) were compared to 28 women with a history of sexual assault (SVP) (assault occurring …

A Socio-Historical Analysis Of The Benton Harbor, Michigan Desegregation Case Between 1967 And 1981, Tiffany Anne Loftus Butzbaugh

Dissertations

This study focuses on the socio-history of the Benton Harbor Area School District's ("BHASD") desegregation froth 1967 when Berry v School District of TheCity of Benton Harbor , C.A. 9 W.D. Mich. (1967) ("Berry ") was filed until 1981, when the court-ordered busing took effect. The purpose is to write a socio-historical analysis of BHASC Board of Education (BHASC Board) decisions regarding racial balance and imbalance in BHASC schools. Specifically, I study theBHASD Board, the administration, and the community concerning the following socio-historically relevant decisions: (1) the transfer of students from theSodus attendance district in the BHASD to the …

Foreign Direct Investment In Developing Countries: Uncertainty, Trade And Welfare, Adugna Lemi

Dissertations

The objectives of this three-essay thesis are first, to analyze the role of economic and political uncertainty in affecting FDI flows; second, to test competing hypotheses that explain the determinants of sales of affiliates of U.S. multinational firms to alternative destinations; and third, to investigate the welfare impact of FDI flow on local firms in a host country. These issues are interrelated, as uncertainty is one of the main impediments in developing countries to attract foreign direct investment, and uncertainty in turn affects business practices of foreign affiliates in a host country. The combined effects of uncertainty and business practices …

The Effect Of Alcohol On Women’S Detection Of Risk In A Date Rape Analogue, Marci Marroquin Loiselle

Dissertations

Research strongly suggests that alcohol is a risk factor for date rape for both victims and perpetrators (Abbey, 1991, Fritner & Rubinson, 1994; Miller & Marshall, 1987; Muehlenhard & Linton, 1987; Norris & Cubbins, 1992; Marx, Van Wie, & Gross, 1996). Many victims of sexual assault consume alcohol prior to being raped (Marx, et al., 1999), and "early recognition of when a social situation with a male acquaintance or intimate partner has become threatening can aida woman in preventing a serious incident of sexual aggression" (Norris, et al, 1999, p. 230). This study's purpose was to experimentally address the link …

Male And Female He Created Them: Ælfric’S Lives Of Saints And Patristic Theories Of Gender, Rhonda L. Mcdaniel

Dissertations

My dissertation researches the writings of the four Latin Doctors, Ambrose, Jerome, Augustine, and Gregory the Great, in order to challenge the scholarly stereotype of misogyny and anxiety about women in the writings of these influential figures and, more importantly, to build the cultural foundation upon which to base an interpretation of Ælfric’s portrayals of male and female saints in the Lives of Saints.

Accordingly, in the first chapter I focus on the writings of the Latin Doctors concerning the practice of virginity and on their explications of the Trinity and the Creation and Fall of humankind. I then trace …

Spearman Rank Regression, Jason C. Parcon

Dissertations

The main purpose of this dissertation is to obtain an estimate of the slope parameter in a regression model that is robust to outlying values in both the x - and Y-spaces. The least squares method, though known to be optimal for normal errors, can yield estimates with infinitely large MSE's if the error distribution is thick-tailed. Regular rank-based methods like the Wilcoxon method are known to be robust to outlying values in the Y -space, but it is still grossly affected by outlying values in x -space.

This dissertation derives an estimate of the slope from an estimating …

Double Photoionization Of Atoms, Marco Wiedenhoeft

Dissertations

Double photoionization studies of atoms and molecules are new state-of-the-art studies providing a deeper knowledge of multi-electron excitations. This typeof work advances the understanding of many-body problems. Double photoionization of atoms is of great interest to learn about electron-electron correlation and relaxation effects in atoms and molecules. In order to study double photoionization processes, a new electron-electron coincidence apparatus was built to carry out the measurements. I will present the apparatus I built as well as the results of the measurement of the triply-differential-cross-section (TDCS) for the predicted interference and Post-Collision-Interaction (PCI) effects in the Xenon N₅O_{2,3 …}

Examination Of The Skills And Dispositions Needed For Assistant Principals To Be Effective Disciplinarians, Sherie Lynn Williams

Dissertations

The main purpose of this study was to identify the set of key skills and dispositions needed by secondary school assistant principals to function as effective disciplinarians. A secondary purpose of this study was to explore the perceptions of males and females concerning this topic. This was accomplished by exploring the perceptions of experts and practitioners, both male and female, concerning their ideas on the skills and dispositions needed by assistant principals at the secondary level to be successful disciplinarians.

This study used two methods of data collection, the Delphi Method of collecting information and focus groups. A panel of …

Inroads Toward Contemporary Latina Literature: Poetry And Criticism, Adela Josefina Najarro

Dissertations

No abstract provided.

Reliability Of The Educational Technology Profiler Survey As A Method Of Gathering Information In Teacher Preparation Programs, Carmen A. Cornieles

Dissertations

Education is an important factor in the introduction of technology as tools to be used in the teaching process. Teacher preparation programs for general education and special education are working to ensure that technology is a common denominator method of instruction following standards from teaching accrediting agencies. Institutions in charge of teacher preparation programs are aware of the need to prepare their students effectively and efficiently in the use of technology to support teaching and learning. Students in teacher preparation programs should become knowledgeable on using educational technology in their everyday instruction when placed in a school. For this reason, …

A Guide For Conducting Teachers: Physical Movement Taught In Six Selected Instrumental Conducting Textbooks And An Annotated Bibliography, William Geoffrey Carlton

Dissertations

The purpose of the dissertation was to provide a comparative guide of conducting textbooks for conducting teachers and students. In order not to replicate M. Johnson's (1967) dissertation only instrumental conducting textbooks available to conducting teachers and students between 1967 and 1997 were considered. The survey determined that the most common area emphasized by textbook authors was physical movement. Six textbooks by the following authors were selected for comparison of approaches to physical movement: E. A.H. Green (1997), D. Hunsberger and R. E. Ernst (1992), D. Kohut and J. W. Grant (1990), J. A. Labuta (1995), B. McElheran (1989), and …

Job Satisfaction, Leadership Styles, And Teaching Practices Among Cnmi Public Elementary School Teachers, Charles J. Algaier Edd

Dissertations

This study investigated whether teacher leadership styles and teaching practices influenced teacher job satisfaction among public elementary school teachers in the Commonwealth of the Northern Mariana Islands. The study answered the following questions: (1) what is the level of job satisfaction among public elementary school teachers in the CNMI; (2) to what extent do CNMI teachers fall into the personal leadership style categories of transactional or transformational; (3) to what extent do CNMI public school teachers prefer either didactic or constructivist teaching practices; (4) to what extent do demographic factors, preferred leadership styles, and preferred teaching practices affect the degree …

Ownership And Stewardship: Attitudes Among Michigan’S Voters Impacting Opposition To Great Lakes Water Diversions, Bruce A. Nanzer

Dissertations

The problem addressed by this research can be demonstrated through the following scenario: If we were to ask randomly chosen voters in the state of Michigan if they possessed sufficient knowledge of Great Lakes water diversion policy, the answer would likely be no. Yet, if after a short description of the purpose for this type of policy, the voter was questioned about supporting such actions he or she would likely voice strong support for strategies that would prevent water diversions.

The objective of this research was to understand why Michigan's voters would readily voice opposition to Great Lakes water diversions …

Effects Of Writing Therapy Across Ptsd And Chronic Stress, Jennifer E. Lewis

Dissertations

Research supports the effectiveness of writing therapy in reducing physical health problems and increasing positive feelings (Pennebaker & Beall, 1986). More recently, research indicates that writing about traumatic experiences is as effective as EMDR in reducing symptoms of Post Traumatic Stress Disorder (Largo-Marsh & Spates, 1997). The current study assessed the treatment efficacy of writing therapy for individuals with varying degrees of stress related symptoms. Specifically, this study examined writing treatment for Post-Traumatic Stress Disorder and work-related chronic stress or "burnout."

The study utilized a pretest-posttest comparison group design. Repeated measurements !)n primary dependent variables were collected at pretest through …

Investigation Of The Iced Flowfield Characteristics Related To The Stall Margin Instrumentation Used In Icing Conditions, Erik Pederson

Dissertations

The purpose of this dissertation is to investigate the relationship between the flowfield surrounding an iced airfoil and the stall margin instrumentation developed for use in icing conditions. The stall margin system indicates to the pilot the change in available lift due to ice accretions on the leading edge of an airfoil. This system displays the change in the form of a normalized lift coefficient. Four pressure ports are chosen to specifically maintain a constant calibration curve, for pressure versus normalized lift coefficient, regardless of ice shape. This allows these pressures to be used to determine the change in maximum …

Understanding On Concepts Of Force Of Thai Freshmen, Chokchai Usawinchai

Dissertations

The central concept of Newtonian mechanics is force. Without this concept, the students would find the rest of mechanics very difficult to master. Based on this hypothesis, the understandings and misconceptions of Newtonian mechanics were investigated.

Three hundred eighteen Thai freshmen participated in this study. The freshmen were divided into two groups according to their high school locations, Bangkok and other cities of Thailand. The Force Concept Inventory was used to probe the freshmen's understandings and misconceptions. The SPSS and EXCEL programs were used to analyze the data. The translation of the FCI into Thai and its subsequent validation is …

A Comparison Of Different Schemes For Selecting And Estimating Score Functions Based On Residuals, Ali A. Al-Shomrani

Dissertations

In a linear model when the errors follow a normal distribution, least squares methodology is most powerful. However, when the assumption of normality of the error distribution is not met then there exist methods which are more powerful than least squares methods. Rank-based methods form one such class. These methods depend on the selection of a score function [varphi]( u ). The correct choice of [varphi] leads to an optimal (efficient) analysis, but its selection depends on the error distribution which is not known.

In this thesis, we explore different schemes for score selection. Some of these schemes are functions …

Using Protocol Analysis To Help Determine The Behavioral Function Of Conducting Safety Observations, Alicia M. Alvero

Dissertations

Recent research endeavors have demonstrated the existence of an observer effect . In other words, conducting safety observations increases the safetyperformance of the observer, and may result in safety-related verbalizations. The purpose of this study was to help determine whether observers make self-verbalizations regarding their safety performance and whether these reports are functionally related to safety performance. In order to answer these questions two experiments were conducted using both protocol analysis and the silent dog method. Protocol analysis is used by cognitive scientists to analyze thethoughts of a person as they perform a task, and the silent dog method allows …

Interspecies Encounters: An Ethnography Of A Veterinary Hospital, Dana Atwood-Harvey

Dissertations

There were three broad reasons for this research. The larger goal was to continue to advance the incorporation of 'other' animals and the rest of nature in general in sociological theory and research. The second was to suggest to those who have incorporated 'other' animals into their research, to include them as participants. The third was to redirect the focus of those who have incorporated 'other' animals as participants, to the impact that ideological structures and other social factors have on human-'other' animal encounters. Toward this end, I directed the focus of my study to examine human-'other' animal encounters ina …

Using Journal Writing To Promote Reflective Practice In The Counseling Practicum: A Multiple-Case, Narrative Study Of Counselor Development, Jean Mauriello Germain

Dissertations

The present study investigates the development of reflective practice for beginning counselors. A review of the literature provides support for the benefits of counselors developing reflective practice, and for the use of tools such as portfolios and written journals in order to assist counselors in the development of reflection. However, because these tools have not been systematically implemented and investigated, little is known about the nature of counselors' development of reflective practice. A narrative, multiple-case methodology is used in order to examine the process of development in depth. Methods were employed to achieve trustworthiness of the data. Four participants took …

Essential Elements Of An Implementation Process For Grant-Funded Projects/Programs In Nonprofit Organizations, Margaret M. Bernhard

Dissertations

Grant seeking is a source of funding for many nonprofit organizations. If a proposal is funded, the organization must contend with the responsibility of project implementation and the expectations of successful project outcomes. A project implementation process with strategic and tactical steps that clearly define the path that leads to positive grant outcomes would assist the grant administrator. Using the Delphi Method as a methodological tool for facilitating dialog among anonymous experts, 12 foundation program officers identified, ranked, and rated the essential elements and barriers of grant implementation. The process revealed 13 essential elements of implementation and 11 barriers to …

Experiences And Meanings Of Maternal Ambivalence With First-Born, Early Adolescents, Teresa M. Distefano

Dissertations

A phenomenological method of qualitative inquiry is used to capture the experiences of maternal ambivalence while mothering first-born, early adolescents. From the nave descriptions of seven participants a description of and response to maternal ambivalence are examined. Major findings include three overarching domains: (1) maternal context, (2) shared essence of maternal ambivalence, and (3) participants' responses to maternal ambivalence. Findings relevant to contextual variables identified as influencing mothers' daily lives with their adolescents include: (a) perceptions of their adolescent, (b) perceptions of their adolescents changing context, and (c) participants' marital status. Data comprising the shared essence of maternal ambivalence include: …