Digital Commons Network^™

A Combined Gel Entrapped And Membrane Attached Microbial Process For Biodegrading Organic Compounds, Fayaz Saifuddin Lakhwala

Dissertations

A comparative study has been performed between two bioreactors treating phenol, one using calcium alginate entrapped microorganisms, and the other using microorganisms attached on the surface of a polymeric membrane. Laboratory experiments conducted in batch recirculation mode, as well as a continuous feed mode, showed that the calcium alginate bio-bead reactor is more efficient in treating high feed concentrations of phenol, while the membrane bioreactor is more effective in the lower concentration regime (less than 150 ppm). In batch recirculation mode, the reaction rates (expressed as mg phenol/hr*gm dry cells) in the membrane reactor are an order of magnitude higher …

Thermodynamics Of Strong Electrolyte Solutions : Prediction Of Osmotic Coefficients By Pair Correlation Function Method, One Kwon Rim

Dissertations

Thermodynamic properties (osmotic coefficients) of strong electrolyte solutions have been studied by the method of statistical mechanics. First the charged soft sphere potential is developed based on the Pauling type model. Next the charged soft sphere potential is converted to the thermodynamically corresponding charged hard sphere potential by way of the perturbation method developed by Verlet and Weis. Simultaneously, the radial distribution function is developed by modification of the Exponential theory through introduction of the Stillinger-Lovett moment condition. The effective hard sphere diameter values calculated by the perturbation method are combined with the modified Exponential theory, and these quantities are …

On Local Stresses And Spring Constants Of A Sphere-Nozzle Connection, Ban-Li Lyow

Dissertations

This dissertation studies the local stresses and spring constants of a spherical shell with a nozzle attachment when it is under various loadings, namely radial force, overturning moment, horizontal shear force, and torsional moment. Because of the mathematical difficulty in modeling the nozzle-sphere configuration, particularly with nozzle opening, the finite element method (ANSYS package) is utilized in this study. The model used in this study is a quadrilateral thin shell element model when the γ_s (spherical radius/thickness) value is larger than 10. Otherwise the isoparametric solid element is used. The resulting stresses are basically biaxial state of stresses. It …

The Effect Of Sexual Harassment On Female Naval Officers: A Phenomenological Study, Kathleen Anne Krohne Edd

Dissertations

Sexual harassment has grown to epidemic proportions since being documented as a workplace problem. Court cases are rising along with costs to organizations from litigation, turnover, absenteeism and stress-related medical claims. Courts are continually refining the legal definition of sexual harassment, resulting in a steady expansion of employers' liability. Perceptions of men and women regarding what constitutes sexual harassment differ markedly as do their responses to sexually oriented behaviors at work. Development of a formula for effectively preventing sexual harassment is, therefore, a complex and perplexing exercise. Two of three women serving in the military report that they have been …

The Leadership Process And Its Effects On Self-Managed Work Groups In American Manufacturing Companies, Stephen R. Wirkus Edd

Dissertations

Over the past 75 years, leadership has become a widely studied phenomenon, with many theories and models offered to assist the layman to become an effective leader. Most of these theories have been based on management models, that is, models that adapt management behaviors and goals into what the authors call leadership. These theories fall into several categories: great man, trait, contingency and situational among others. While these theories have provided practitioners some valid ideas on how to improve their managerial effectiveness, they have done little in the way of expanding the knowledge of the process of leadership. This study …

The Effects Of Implementing "Its In The Cards" Into Third Grade Math Classes, Marsha Anne. Hestad

Dissertations

No abstract provided.

Criteria Used By Illinois School Boards In The Selection Of A New Superintendent During The 1987-88 School Year, Donald L. Kussmaul

Dissertations

No abstract provided.

A.S. Makarenko's General Educational Ideas And Their Applicability To A Non-Totalitarian Society, Rose Edwards

Dissertations

No abstract provided.

Ethnic Inclusion Strategies For The World Affairs Council: A Case Study, Adriana Cornelia Theresia Zylmans Edd

Dissertations

The inclusion of people of diverse ethnicities in voluntary organizations is a challenging endeavor. Cultural diversity, rich traditions, historical perspectives, ethnic celebrations, religion, and language are lenses through which leaders of organizations can view the many uniquenesses, differences, and similarities among ethnic groups. The World Affairs Council of San Diego, from January 1,1989 to July 1, 1990, undertook an ambitious community project entitled, "Community and Citizen Involvement in Foreign Policy," funded by the Ford Foundation, to increase the participation of ethnic groups, women, and youth in the Council. In this research study, the ethnic inclusion strategies used by the Council …

The Myth Of Performance Appraisals, Michael Bochenek

Dissertations

No abstract provided.

Self-Efficacy, Defensive Pessimism, And Social Support: Relationships To The College Adjustment Of Minority Students, Anita G. Erazo

Dissertations

No abstract provided.

Dynamic And Spectroscopic Studies Of Triplet State Nitrogen, Scott M. Hurst

Dissertations

No abstract provided.

An Analysis Of Student Achievement In Mathematics As A Result Of Direct And Indirect Staff Development Efforts Focused On The Problem-Solving Standard Of The National Council Of Teachers Of Mathematics, Debra Ann Jagielski

Dissertations

No abstract provided.

An Investigation Of The Relationship Of Psychological Type To Completion Of The Doctor Of Philosophy Degree, Elizabeth C. O'Connell

Dissertations

No abstract provided.

Myers Briggs Type Indicator Styles And Cognitive Performance, Gary Mitchell Jaworski

Dissertations

No abstract provided.

James F. Redmond: An Urban Superintendent’S Response To Selected Challenges (1966-1975), John P. Reilly

Dissertations

No abstract provided.

Induction Of Gene Expression In Response To Stress In Pseudomonas Aeruginosa Pao, Audrey L. Warner-Bartnicki

Dissertations

No abstract provided.

On Local Stresses And Spring Constants Of Pipe-Nozzle Connection, Hson-Chih Sun

Dissertations

This thesis presents a comprehensive study of local stresses and spring coefficients of pipe with a nozzle connection, analyzed by the finite element method (FEM). Six types of loading are discussed: radial force, circumferential moment, longitudinal moment, circumferential shear force, longitudinal shear force, and torsional moment.

For the local stresses, the bending and membrane stress factors due to each of these loadings are presented in a series of plots with various gamma (piping radius/thick-ness) and beta (nozzle radius/pipe radius) values. These stress factors will readily replace those previously published in WRC No. 107. This work not only gives more accurate …

Self-Reported Leadership Styles Of Higher Education Administrators In Venezuela As Related To Selected Demographic Variables, Julian Serafin Martin

Dissertations

The purpose of this study was to identify the self-reported leadership style of higher education administrators in Venezuela as related to six selected demographic variables: age, sex, highest academic degree earned, years of experience in either colleges or technological institutes, marital status, and union experiences. The subjects of the study were 58 directive council members of three colleges and five technological institutes in Venezuela. Eighty-three percent of all potential subjects participated in the study. Two instruments--the LBA-II-Self (Spanish version produced by Blanchard Training and Development, Inc.) and a demographic data form--were used to gather data.

The validity and reliability of …

A Trend Analysis Of Occupational Therapy Treatment Outcomes Following Carpal Tunnel Syndrome Surgery, Richard G. Cooper

Dissertations

A trend analysis of treatment outcomes was completed for a single group of subjects who participated in a staged occupational therapy rehabilitation program following carpal tunnel surgery. In addition, the enabler skills of range of motion and muscle strength were compared with the outcome skills of motor function and occupational performance. Thirty-one subjects participated. Data were collected before surgery, and three months, six months, and nine months after surgery.

The findings from this study indicated that: (a) differences in range of motion, gross grasp, motor function, and occupational performance occurred in linear trends; and (b) increases in enabler skills were …

Shape Preserving Piecewise Cubic Interpolation, Thomas Bradford Sprague

Dissertations

No abstract provided.

A Replication Of The National Association Of Secondary School Principals Study Of High School Principals And Their Schools In Michigan, Helen M. Potoczak

Dissertations

The purpose of this study was to replicate in part and with revisions in the state of Michigan the 1987 National Association of Secondary School Principals (NASSP) study of high school principals and their schools (Pellicer, Anderson, Keefe, Kelley, & McCleary, 1988). The research questions were (a) to determine if the personal and professional characteristics of high school principals in Michigan were similar to those throughout the United States; (b) to determine if the data of the national study compared to Michigan in regard to selected demographics and job related tasks of principals; and (c) to determine when the data …

A Woman For All Seasons: A Biography Of Julia Catherine Stimson (1881-1948), Mary T. Weber Sarnecky Dnsc, Mn, Bsn

Dissertations

Little is known or written about one of nursing's most enduring and productive leaders, Julia Catherine Stimson. The purpose of this investigation was to examine the life and character of Miss Stimson and to identify the many, diverse contributions which she made to the profession of nursing and to humanity. Additionally through an analysis of her leadership qualities, a profile of an effective nursing leader evolved. The historical method was used in this investigation. Data was collected for the study from the National Archives, the Center of Military History, the New York Hospital/Cornell Medical Center Archives, the New York Historical …

The Relationship Between Private And Commercial Vehicle Driver Records And Accidents In Michigan, Robert E. Maki

Dissertations

The primary objective of this study was to determine whether previous accidents and citations are reliable predictors of future tractor-trailer heavy truck accidents in Michigan. In addition, the background material on accident trends shows how heavy truck safety policy was formed at the Michigan Department of Transportation.

Historically, accident prediction models have been able to explain only small portions of the accident experience. More recent studies have tended to show that previous citation and accident experience were good predictors of commercial vehicle accidents. Most studies have suffered from an admitted lack of exposure data and incomplete accident statistics.

Through the …

A Study Management Course For High-Risk Black College Freshmen, Mark Andrew Jackson

Dissertations

Attrition of high-risk, black college students has been a perpetual problem faced by colleges and universities. The importance of not only attending college, but actually receiving a degree has substantially greater cultural, educational, societal, and financial implications for black people than for whites. Also, because of shifting demographics, the relatively high attrition rates of black students will have an even greater impact on colleges and universities in upcoming years.

A review of the literature indicates that the origins of this problem are most directly related to academic deficiencies, poor motivation, and inadequate time management and self-management. While there exist numerous …

Computer Aided Localization Of Neurological Diseases, Yusuf Parlar

Dissertations

Computers in medicine has brought new dimensions and better understanding of uncertainties in the field of medical sciences in the last decade. This thesis is focused upon the localization of neurological lesions in the human nervous system. It relates clinical neurological test outcomes to pathways of function or malfunction. Certain methods are proposed-empirical. stochastic. Deterministic-to estimate the spatial distributions of lesion probabilities.

First. a Bayesian model is presented to estimate the posterior probability of lesion from a priori information, based on the test outcomes. Due to unavailable data alternative methods and models are presented: Regression Analysis. Monte Carlo simulation, and …

On The Performance Of Minimum Redundancy Array For Multisource Direction Finding, Byung-Seub Lee

Dissertations

As an application of power spectrum estimation, the multi-source direction finding has been evolved from conventional FFT method to Superresolution methods such as Multiple Signal Classification(MUSIC) algorithm. Uniform Regular Array(URA) was mainly used in all these approaches.

The Minimum Redundancy array(MRA); a non-uniform thinned array which results in an input signals covariance matrix with minimum redundancy has been shown to have certain interesting properties for spectrum estimation. Only recently it was suggested to use the MRA for spatial estimation. The purpose of this research was to study the performance of this array in multi-source direction finding estimation and compare it …

Computer Modeling And Analysis Of Biological Rhythms, Shi Xiong Yang

Dissertations

Biological rhythms are an important phenomenon and feature of physiologic systems. Indirect means have to be employed for their description and exploration due to the unclear internal nature of the system. This study analyzed and developed several possible mathematical models using single or multidimensional nonlinear differential equations to approach the experimental circadian data. The numerical solutions of the models were obtained by computer simulation and the simulated and experimental acquired circadian data were analyzed in both the time and frequency domains. Phase plane plots, phase response curves and power spectrum analysis were employed to determine the nonlinearity of the system …

Mass Transfer Of Hazardous Organic Compounds In Soil Matrices Relevant To Thermal Desorption/Incineration, Jong-In Dong

Dissertations

Soils contaminated with hazardous organic compounds have been known to threaten human health both directly through various contact mechanisms and indirectly through leaching or transfer to the food chain. Thermal desorption of contaminated soil matrices with secondary treatment of the effluent gases (collection, incineration, etc) is one of most feasible and developing technologies for cleaning of contaminated soils. There is, however, little known about the mass transfer principles of organic contaminants through the heated soil matrices. The objectives of this study is, therefore, to learn and understand details of the mass transfer processes of organic compounds in these soil matrices. …

An Analysis Of Four Performance Techniques For Paraprofessional Direct-Care Staff Working With Developmentally Disabled Adults In Group Homes, L. Martin Grabijas

Dissertations

The habilitation and training of the developmentally disabled has improved markedly in the last two decades. The creation of small, community-based living facilities has allowed these individuals to move from restrictive settings into the community where training in daily living skills can occur in a more natural fashion. While this movement has been positive for the consumer, the preparedness of the staff working in those facilities has not been adequately addressed. Many human service agencies use a generic training package to prepare their staff, yet current research indicates that such training is less than adequate, both in terms of preparing …