Digital Commons Network^™

Studies On Improved Integrated Membrane-Based Chromatographic Process For Bioseparation, Yanke Xu

Dissertations

To improve protein separation and purification directly from a fermentation broth, a novel membrane filtration-cum-chromatography device configuration having a relatively impermeable coated zone near the hollow fiber module outlet has been developed. The integrated membrane filtration-cum-chromatography unit packed with chromatographic beads on the shell side of the hollow fiber unit enjoys the advantages of both membrane filtration and chromatography; it allows one to load the chromatographic media directly from the fermentation broth or lysate and separate the adsorbed proteins through the subsequent elution step in a cyclic process.

Interfacial polymerization was carried out to coat the bottom section of the …

The Use Of A Water Quality Model To Evaluate The Impacts Of Combined Sewer Overflows On The Lower Hudson River, Wen-Pin Shu

Dissertations

CSO discharges have long been recognized as a significant source of water pollution. While many sources of water pollution have been controlled over the past 20 years, CSOs continue to be a main environmental concern in several areas, especially in old cities. In the past, most CSO research focused on the CSO control processes, including floatables and suspended solids removal. Few studies have been conducted in the area of the impacts of CSO discharge on the receiving water quality. To achieve this purpose, a powerful water-modeling tool, WASP 6.1, is utilized in this study. The Lower Hudson River is selected …

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 …

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 …

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 …

Self-Reported Personal Problems Of Adventist Academy Students, Ellen Marsh Crosby

Dissertations

Problem. Adolescence is a time fraught with many challenges. There are no current studies prior to this one for Adventist academy students concerning the whole range of their personal problems.

Method. A survey of students in 14 Adventist academies was conducted in the regular classroom setting using the Personal Problems Checklist for Adolescents (PPC-A). The data were analyzed using descriptive and inferential statistics. Data were tested with one-way, two-way, and, three-way ANOVA and correlation coefficients to determine differences between males and females, age groups 13/14 to 18/19, and in three different settings of day, boarding, and self-supporting Adventist …

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 …

Teacher Perceptions Of Internet-Based Distance Education In Adventist Colleges And Universities : A Mixed-Methods Study, Susan B. Smith

Dissertations

Problem. An examination of Internet-based distance education (IBDE) is important in order to maintain the delivery of quality higher education and to encourage the systemic adoption of policies and practices that promote excellence in IBDE. The quality of online distance education will increasingly become the standard by which students choose a program as their educational options have multiplied with the dramatic growth in distance education.

Method. This was a sequential exploratory mixed-methods study o f the perceptions of teachers on IBDE. It was conducted collaboratively with Pamela Cress who examined administrator perceptions. Data were collected for both studies from teachers …

Nursing Students' Experiences In Personal Spiritual Formation And In Provision Of Spiritual Care To Patients, Beverly Jane Cobb

Dissertations

Problem. Nursing professionals acknowledge that (a) spiritual care is part of holistic care, and (b) nursing education about spiritual care of patients is inadequate. Evidence points to the importance of personal faith and spirituality in order for the nurse to more effectively render spiritual care to patients. Enhancing knowledge about how nursing students learn spiritual care can benefit nursing education and, ultimately, patient care. This study explored how students with high faith maturity provided spiritual nursing care to patients.

Method. This study engaged phenomenological methods with a study population selected from two faith-based educational institutions. A total of 187 nursing …

Administrator Perceptions Of Internet-Based Distance Education In Adventist Colleges And Universities : A Mixed-Method Study, Pamela K. Cress

Dissertations

Problem . The quality of Internet-based distance education (IBDE) will increasingly become the standard by which students choose a program as higher educational options multiply due to the dramatic growth in distance education. A system-wide examination of perceptions of IBDE in Adventist highereducation is important to administrators for future institutional strategic planning purposes, systemic adoption of policies and practices that promote excellence, and identifying collaborative efforts.

Method . This was a sequential exploratory mixed-method study of the perceptions of administrators on IBDE. It was conducted collaboratively with Susan Smith who examined teacher perceptions. Data were collected for both studies from …

Faculty Perceptions Of Institutional Commitment To The Scholarship Of Engagement, Mackenzi Anne Huyser

Dissertations

Problem. Institutions of higher education are in an important position in relation to fulfillment of their institutional mission. Boyer (1996) introduced to the higher education community an alternative approach to scholarship to address this shift from original mission. While Boyer (1990) examined institutions of higher education as a whole, the distinctive worldview, mission, and philosophy of reformed Christian institutions have not been examined to determine to what extent they are fulfilling their calling to transform creation and redeem culture. Therefore, the purpose of this study was to examine social perceptions that full-time faculty, serving in reformed institutions, hold about their …

A Comparison Of Kinetic Family Drawings Of Firstborn And Second-Born Siblings, Lynn Anderson

Dissertations

Problem. While the Kinetic Family Drawing (KFD) is a popular assessment tool for clinicians, research on developmental issues and how siblings draw their families is lacking. The purpose of this study was to (a) describe the way siblings perceive themselves and their family interpersonal relationships as expressed in the KFD; and (b) to describe possible developmental age differences in the KFD.

Method. The KFD and a Family Dynamics Interview Schedule were administered to 50 pairs of first- and second-born children from Southwestern Michigan, ages 5-14. The data were analyzed quantitatively by the Wilcoxon Sign Test and Chi-Square, using …

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 Concept Of Salvation In 19-34-Year-Old Seventh-Day Adventists Who Live In The State Of Indiana, Neva Charlotte Regal

Dissertations

Purpose of the Study. The purpose of this study was (a) to describe how the concept of salvation develops among Adventist young adults and (b) to examine the perceived influence of mentors and (c) life experiences, especially traumatic experiences, on the development of the concept of salvation and intrinsic religious motivation.

Method. This cross-sectional developmental study utilized three instruments: (a) the Salvation Concept Interview, (b) the Life Experience Interview, and (c) the Intrinsic/Extrinsic Religious Motivation Scale. Interviews were conducted with 132 individuals, and the data were analyzed descriptively and quantitatively using Spearman rho correlations and Chisquares.

Results and Conclusions. Limited …

The Creation And Development Of An Afrocentric Christian College: Imani Kuumba College And Graduate School, Juanita M. Browne Edd

Dissertations

The study examines Imani Kuumba College, (IKC), an Afrocentric Christian College. Since previous research does not examine any higher institution that provides a type of learning that focuses totally on the study of the Afrocentric world, this historical case study describes a unique educational institution that proposes to teach from a focus designed to raise self-esteem for African-Americans and racial understanding for other groups by studying the African-American experience, historically, spiritually and culturally. The study begins with an introduction that outlines the environmental and societal issues that motivated the creation of this innovative institution and its unique program. After discussion …

Leaders' Influence On School Reculturing: A Case Study Of An International School, Brian C. Matthews Edd

Dissertations

Organizational theorists and even practitioners are beginning to use the construct of organizational culture to analyze and characterize the complexities and challenges of organizational life. The construct has been used to metaphorize, frame, interpret, and understand various aspects of organizational life, including leadership and the change process. The literature indicates that leaders can influence an organization by attending to its cultural dimensions. Much of this literature, however, is theoretical and speculative, and the empirical work has focused, for the most part, on business. The overarching purpose of this qualitative study was to enrich understanding of the culture construct and its …

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 …

Psychophysically Derived Work Frequencies Associated With Roof Shingling Operations Involving Change In Grade, Sang Dae Choi

Dissertations

The objective of this study was to investigate the effect of roof slope on psychophysical roof shingling frequency. Twelve healthy males (21-30 years old) were used as participants. Experiment one was designed to determine Maximum Acceptable Roof Shingling Frequency (MARSF) for a workday period using psychophysical methodology. Results indicate that 198 shingles/hr is an acceptable roof shingling frequency for a workday. Furthermore, 2 hours is an acceptable testing period (equivalent to the workday). Postural sway and physiological variables support these findings. Experiment two was designed to study the effect of slope (18°, 26°, and 34°) on MARSF. Experiment two indicates …

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 …

Social Disorganization, Disorder, Social Cohesion, Informal Controls, And Crime: A Reformulation And Test Of Systemic Social Disorganization Theory, Gayle M. Rhineberger

Dissertations

The primary purpose of this dissertation is to modify and test the systemic social disorganization models of crime proposed by Bursik and Grasmick (1993) and Sampson, Raudenbush, and Earls (1997), and offer an empirical test of my hypothesized model. Specifically, the model includes traditional indicators of social disorganization (racial/ethnic heterogeneity, socioeconomic status, family disruption, residential stability) as exogenous variables; social and physical disorder, social cohesion, and three levels of informal social control (private, parochial, and public) as intervening mechanisms; and official crime counts and crime victimization as dependent variables.

The data used in this study come from the Project on …

Culture And The Effectiveness Of Supplier Diversity Programs: A Test Of Predictors, Gwendolyn Whitfield

Dissertations

Increased globalization and diversity has brought with it unique interdependencies. As we experience demographical shifts unlike any other in U.S. history, the growth rate of minority-owned businesses may represent unprecedented opportunity for corporate buyers to partner with minority suppliers. According to the Minority Business Development Agency, the minority population will represent 37.4 percent of the total U.S. population by the year 2020, and will yield purchasing power of $3 trillion. Moreover, it is estimated that between the years 2000 and 2050 the majority of new business starts will originate in the minority business community (U.S. Small Business Administration 1994). Minority-owned …

Optimal And Intelligent Decision Making In Sustainable Development Of Electronic Products, Meimei Gao

Dissertations

Increasing global population and consumption are causing declining natural and social systems. Multi-lifecycle engineering and sustainable development address these issues by integrating strategies for economic successes, environmental quality, and social equity. Based on multi-lifecycle engineering and sustainable development concepts, this doctoral dissertation aims to provide decision making approaches to growing a strong industrial economy while maintaining a clean, healthy environment. The research develops a methodology to complete both the disassembly leveling and bin assignment decisions in demanufacturing through balancing the disassembly efforts, value returns, and environmental impacts. The proposed method is successfully implemented into a demanufacturing module of a Multi-LifeCycle …

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 …

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 …

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 …

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 …

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 …

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 …