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Removal Of Volatile Organic Compound (Voc) Vapors In Biotrickling Filters : Process Modeling And Validation With Chlorinated Aromatic Compounds, Christos J. Mpanias

Dissertations

This study dealt with the removal of vapors of volatile organic compounds from airstreams in biotrickling filters (BTFs). A detailed general model was developed for describing the process under steady-state conditions. The model accounts for mass transfer between phases (air, liquid, biofilm) and biodegradation of pollutants in the biofilm. It also accounts for potential kinetic interactions among pollutants as well as potential process limitations by oxygen availability.

The general model was experimentally validated using mono-chlorobenzene (m-CB) and ortho-dichlorobenzene (o-DCB) as model compounds either alone or in mixture with each other. Before BTF experiments were undertaken, a systematic kinetic study was …

Modelling Of In-Situ Bioremediation With Emphasis On Inhibitory Kinetics And Biomass Growth, Dilip Kumar Mandal

Dissertations

This thesis was motivated by the need for better engineering tools to predict the extent of contaminant plume migration in the saturated zone. The principal result was a mathematical model analogous to a catalytic packed-bed reactor, in which the subsurface was considered to be composed (conceptually) of soil aggregates (the "catalyst" particles, in which biodegradation, diffusion, and sorption take place), and a mobile phase (groundwater) passing around the aggregates, in which convection, axial diffusion, and mass transfer from the aggregates take place.

The modelling emphasis was on a more detailed exposition of the biokinetics of the system (including an inhibitory …

Being Alone: The Experience Of Elderly Homebound Females, Sharon Davis Burt Dnsc, Msn, Rn

Dissertations

Elderly women comprise one of the fastest growing segments of the population in the United States. This growth is due in large part to increasing longevity, and a woman's life expectancy has now reached 79 years. However, along with those added years comes an increase in morbidity and a greater likelihood of living alone. This study describes the life experience of a specific group of elderly women, those who are homebound and living alone. When elderly women are included in research, the same combination of descriptors used for the participants in this study has not been incorporated. Consequently, while much …

The Experience Of Decision-Making Among Telephone Advice/Triage Nurses, Ann Mayo Dnsc, Msn, Rn

Dissertations

The role of the telephone advice/triage nurse is both complex and demanding. All decisions are made while assessing patients without seeing or touching patients. In addition, the role is often developed to decrease health care costs which can be perceived by nurses as being in conflict with their nursing beliefs. The ambiguous nature of the role makes these nurses' daily experiences with decision-making a challenge. Using a phenomenological method, the lived experience of decision-making among telephone advice/triage nurses was explored by conducting multiple interviews with ten nurses. The internal structure of the lived experience was identified through the philosophical perspective …

The Journey Through Perspective Transformation: Learning Nursing Theory, Judith R. Heggie Dnsc, Ms, Rn

Dissertations

Through the use of grounded theory, educational methods most useful for nurses to achieve a perspective transformation, as exemplified by learning nursing theory were examined. Perspective transformation is a theory originally developed by Mezirow (1978) in a study of older women returning to college for additional education. Mezirow defined perspective transformation as the alteration or change of meaning perspectives. Perspective transformation in an individual can be compared to a paradigm change within a scientific community. Within the nursing literature on perspective transformation, most articles related to the perspective transformation needed for nurses to learn to use nursing theory as the …

Molecular Modelling Studies Of Acetylcholinesterase, Charilaos E. Linaras

Dissertations

The controversial role of electrostatic interactions in the process of steering of acetylcholine into the active site of acetylcholinesterases was investigated in this study. A novel methodology was implemented to simulate the process of recognition of acetylcholine by Torpedo Californica and both wild type and charge neutralized mutated Human AChE. The obtained results suggest the important role of coulombic interactions in the steering process. The steering process of selected irreversible AChE inhibitors was also simulated supporting the role of electrostatic interactions in the recognition process.

A novel methodology was also employed to model the covalent adducts of Torpedo Californica and …

The Relationship Between Leadership/Followership In Staff Nurses And Employment Setting, Elaine S. Vandoren

Dissertations

This study tested the hypothesis that staff nurses in hospitals used different leadership and followership behaviors than staff nurses in home care settings. Leadership behaviors were measured using the Multifactor Leadership Questionnaire (Bass, 1995); followership was measured using Kelley’s Followership Style Questionnaire (1992). Three hospital and home care agencies belonging to a private nonprofit corporation in the Midwest provided data. A total of 136 surveys were used in data analysis; 57% of distributed surveys were returned.

Differences between the hospital and home care staff nurses were not found. Self-perception, difficulty in applying clinical behaviors to the MLQ, unknown aspects of …

Molecular Staging Of Colorectal Cancer: K-Ras Mutation Analysis Of Lymph Nodes Upstages Dukes’ B2 Patients, Jennifer S. Thebo

Dissertations

The successful treatment of colorectal cancer depends upon the ability of staging systems to identify patients who are at risk for recurrence. The currently used systems fail in a significant number of patients. Multiple attempts have been made to improve upon these systems in order to provide better treatment for at-risk patients.

A variety of oncogenes and tumor suppressor genes have been implicated in colorectal cancer. Mutations in one of these, K-ras, occur in 40-60% of colorectal carcinomas. However, the relationship between specific mutations and clinical outcome is unclear.

The purpose of this study was to determine whether or not …

A Sense Of Entitlement To Self In Relationships: An Elaboration Of Attachment And Feminist Object Relations Theories, Suzanne Elaine Wolfe

Dissertations

Many women who present for psychotherapy with symptoms of depression and/or anxiety describe a common pattern of involvement in current and past nonmutual relationships. This phenomenon is described and explored in light of a new conception of entitlement. It is proposed that one’s sense of entitlement is a relative relational position along a continuum from overentitlement through healthy entitlement to underentitlement, and that these women are often underentitled in their adult relationships. Their relationships are often with overentitled others, and they may hold internal convictions that their place in relationships is to be underentitled. A particular pattern contributing to underentitlement …

Implications Of Changing To 4 By 4 Semester Block Scheduling For Secondary Students With Learning Disabilities, Sandra Kay Wayne

Dissertations

The purpose of this study was to investigate the impact of changing from a traditional schedule to a block schedule on selected school-related behaviors and measures of secondary students with learning disabilities and their regular education teachers. Areas of impact that were addressed included school performance measures of student success rates, attendance rates, and discipline referrals as well as affective measures of levels of students' active engagement in learning activities, the variety of teaching and learning modes used, and the amount of individualized teacher attention given to students.

The research population consisted of six high schools in south and central …

An Analysis Of Fecal Coliform Bacteria As A Water Quality Indicator, Janet Heyl Vail

Dissertations

The focus of this study is to assess the efficacy of fecal coliform bacteria as a microbiological water quality indicator. The scientific and educational context of fecal coliform bacteria is explored through analysis of large sets of water quality data, focused field monitoring projects, and review of commonly used resources for school-based and volunteer water-related studies. Analyzed data sets include long term sampling (10 years), multiple sites, daily samples, storm event samples, and other parameters monitored in parallel with bacteria. Special attention is given to data sets from Kent County, Michigan. A background reference site in Michigan unimpacted by humans …

Enhanced Terahertz Pulse Generation And Detection Using Electric Field Singularities In Photo-Conducting Antennas, Yi Cai

Dissertations

In recent years, generation of ultra-short electromagnetic pulses with frequency components in the terahertz (THz) range has been achieved by various techniques. Among those different methods, photo-conducting antennas have proven to be the most efficient source of THz radiation. THz spectrometers utilizing such photo-conducting antennas as transmitters and receivers are meanwhile routinely used for spectroscopic studies in the frequency regime between 0.1 to 5THz, which can be covered by neither conventional optical nor microwave spectrometers. However, THz emission power from the existing photo-conducting antenna is not sufficient for many applications (such as electro-optic sampling for real time THz detection and …

Biodegradation Of Pah Contaminated Soil And Sludge Using Non-Ionic Surfactants, Seema Narula

Dissertations

Polycyclic aromatic hydrocarbons (PAHs) are one of the most prevalent environmental pollutants contaminating a large number of industrial and Superfund sites. Low solubility and sorption to solid surfaces limit biodegradation rates of PAHs in the environment. Bioremediation of these compounds have been previously tested with partial success. In the present study, aerobic biodegradation of three PAHs (fluorene, phenanthrene, and pyrene) has been studied in shaker flasks, batch fermenter, and bioslurry reactor, in the presence of non-ionic surfactants. A mixed bacterial culture derived from both a refinery sludge and an activated sludge was used as the seed population in the degradation …

Effects Of Surfactants And Fenton's Reagents On Extraction And Destruction Of Phenanthrene In Spiked Sand, Ming-Chin Chang

Dissertations

In this study, surfactants and Fenton's reagents (Fe(II) and H₂0₂) ere proposed to solve contaminated site problems in situ on a lab scale. Phenanthrene is a simple PAHs (polynuclear aromatic hydrocarbons). The phenanthrene spiked ottawa sand simulated contaminated soil. HPLC was used for phenanthrene analysis because it provided excellent separation and no interference. Six surfactants (including nonionic and ionic) were tested. The operating conditions were optimized based on process and economic considerations such as reaction time, mixing speed, concentrations of surfactants and concentrations of Fenton's reagents. Surfactants could effectively dissolve phenanthrene from the spiked sand. In …

Rupture In The Ordinary, Geraldine Abbatiello

Dissertations

No abstract provided.

An Analysis Of The Pedagogical Methods Of Hindu Gurus, Pearl Anjanee Gyan Edd

Dissertations

The purpose of this study was to explore the pedagogical methods of Hindu gurus that could be applicable to elementary school teaching for the inner development of students. With severe cutbacks to classroom instruction and demands by economic, political, and educational leaders for education to produce a highly skilled work force for the future of the economy, teachers are forced to use precision teaching for measurable learning. The review of the literature in this study presented a historiography of Western pedagogical methods. It showed how Western teaching methods have been defined by the seventeenth-century Newtonian objectivistic-reductionistic-mechanistic paradigm and later enforced …

Empire, Race And War: Black Participation In British Military Efforts During The Twentieth Century, Michael Scott Healy

Dissertations

No abstract provided.

A Theoretical Perspective Of Factors That Relate To The Functional Independence Of Mature Adults, Richard N. Ashden Edd,Dc

Dissertations

Limitations of policy makers and health care providers understanding about living conditions in later adulthood continually constrains mature adults from doing more for themselves, and society. These circumstances move society to devalue mature adults. Less valued mature adults tend to become even more dependent, that is, increasingly less willing to care for themselves, and less able to contribute to the social good. As a result, a vicious cycle was created, and it caused mature adults to live lower quality lives, and become increasingly dependent on others. To empower mature adults in later life, this study does the preliminary work to …

Transborder Economic Development: A Collaborative Partnership In The San Diego-Tijuana Region, Piedad Garcia Edd

Dissertations

The study seeks to understand and develop insights into the San Diego-Tijuana transborder economic collaborative partnership, by examining the Binational Planning and Coordination Committee (BPCC). This entity was established in 1993 via a Letter of Agreement between the City of San Diego and the municipality of Tijuana. Pursuant to the Letter of Agreement the BPCC is examined against the backdrop of the global economy, the emergence of region-states, U.S.-Mexico relations and transborder relations in the San Diego-Tijuana region. A qualitative single case-study methodology is applied to explain the role, function, structure, decision making processes and collaborative leadership relationships of the …

Analysis Of University Personnel's Perception Of Institutional Factors Impacting Student Persistence/Retention, Jose Melendez

Dissertations

Problem

Universities are assessing which institutional efforts are most directly impacting student attrition. This study identified important institutional factors impacting student attrition/retention using university personnel. It also measured personnel perception of how satisfactorily addressed were institutional factors impacting student persistence.

Methods

A quantitative survey methodology was used, and a survey instrument was developed and validated in the study. Tinto’s 1987 model of Student Departure and the Melendez model o f Transaction Satisfaction toward Student Persistence were used to guide the development of the instalment. The Melendez model was formulated as a rival hypothesis and an alternative tool for the study …

A Study Of The Internal Family Systems Model Applied To Remarried Couples Of Stepfamilies In Different Stages Of Adjustment, Susan Marie Carter

Dissertations

Problem. Stepfamilies are becoming the largest family type in the United States. This has significant implications for understanding the complications of remarriage and providing clinical interventions that support the adjustment process of stepfamilies. The Internal Family Systems Model, developed by Dr. Richard Schwartz, asserts that an individual's personality is multiple naturally, and that there are interactions within the individual that have significant impact on their external systems. In applying the IFS model to the study of stepfamilies, this present study identifies the IFS maps of the partners of remarried couples active in stepfamily interaction and to determine how this IFS …

Quality Of Fathering And Its Relationship With Family Background, Demographics, And Characteristics Of Present Family : A Study Of Seventh-Day Adventist Fathers And Fathers From A National Sample, Ruth Depaiva

Dissertations

Problem . Fathers have been assumed to play an important role in the socialization and education of their children. The need to understand the influence and the role of effective fathers becomes especially important in a generation which views fatherlessness as one of the most harmful demographic trends. The Seventh-day Adventist Church considers fatherhood vital for the normal functioning of the family. The present study investigated how selected variables from family background, demographics, and characteristics of present family are related to fathering as measured by self-report of fathering dimensions, practices, and satisfaction.

Method . Two groups of fathers participated in …

The Influence Of Social Integration, Religious Integration, And Religious-Social Regulation On Suicidal Behaviors Among Seventh-Day Adventist Youth, Elizabeth A. Hossler

Dissertations

Problem. Since Durkheim's classic 1897 study of differences in suicide rates between Catholics and Protestants in Europe, much research has focused on the relationship between religion and suicide. Pescosolido and Georgianna (1989) have suggested that Durkheim's Catholic/Protestant paradigm may not work well in the more heterogenous religious culture within the United States. This present study used Pescosolido and Georgianna's (1989) social network theory to examine the influence of social integration, religious integration, and religious-social regulation on attempted suicidal behavior in Seventh-day Adventist adolescents.

Method. The data used for this study came from the Valuegenesis (1989) survey conducted by the Search …

Eating-Disorder Patterns In The Minnesota Multiphasic Personaity Inventory, Karen Baer-Barkley

Dissertations

Problem. Early intervention is crucial for effective treatment of eating disorders. While there have recently been many assessment tools developed specifically for eating disorders, a screening tool is still needed. This study sought to identify, in an eating-disordered sample, the existence of a v-shaped pattern on scales 4-5-6 of the MMPI, a commonly used general measure of psychopathology.

Method. The sample consisted of 356 females who were being treated for eating disorders through the HOPE program between 1989 and 1996. Past research on the MMPI has produced equivocal results on identifying significant patterns on the clinical scales. Since prior research …

The Baltar Sexual Identity Inventory, Female Form: A Multidimensional Measure Of Sexual Identity, Joseph F. Baltar

Dissertations

No abstract provided.

The Electrophysiological Effects Of Acute Thyroid Hormone Exposure On Atrial Myocytes, Jon Paul Fiening

Dissertations

No abstract provided.

Genetic Analysis Of The Nuo Locus That Encodes The Proton Translocating Nadh Dehydrogenase In Escherichia Coli, Holly Jennifer Falk-Krzesinski

Dissertations

No abstract provided.

Adaptation Of The Freshwater Benthic Diatom Achanthidium Rostratum To Resource Limitation, Patrick Daniel Donovan

Dissertations

No abstract provided.

The Contextual And Subjective Experience Of Alcohol Use Incaucasian Adolescents' Daily Lives, Paul Crowe

Dissertations

No abstract provided.

Acculturation And Social Skill Development Among Chinese Immigrant Families, Yue-Ching Chen

Dissertations

No abstract provided.