Digital Commons Network^™

Effect Of Inorganic Salts On Adsorption Process, Pai-Yuan Horng

Dissertations

`Small amounts (0.0 M-0.01 M) of inorganic salts (sodium chloride, calcium chloride, and aluminum chloride) added to bituminous coal fly ash and granular activated carbon in batch adsorption treatment experiments indicates the possibility of enhancing the extent and rate of adsorption process.

Experiments were conducted on aqueous solutions of highly toxic and hazardous chemicals, those include : phenol, benzene, toluene, isopropyl alcohol, and methyl-isobutyl ketone. Single and multiple solute systems were examined separately. Removal of organic pollutants was measured using a Flame Ionization Detector Gas Chromatograph.

This study investigated the role of inorganic salts during the sorption process. The results …

A Study Of Planned Organizational Change At General Dynamics, Richard A. Barker Edd

Dissertations

A case study approach was used to evaluate organizational change that occurred between 1986 and 1989 at General Dynamics Corporation. The purpose of the study was to determine how persons in leading positions can realistically expect to plan and implement significant, planned organizational changes. The changes specifically studied were those which resulted from the planning and implementation of the Ethics Program. The Ethics Program at General Dynamics was examined not only as a case example of a planned, intended change, but as a vehicle for broad strategic goals pertaining to human resources management. Historic data from corporate documents and surveys, …

Literary Perceptions Of Leadership, Dallas B. Boggs Edd

Dissertations

The purpose of this study has been to seek out an active and influential pattern of human leadership in the pages of Western literature. Literature is a mirror of human perception and thought. It is a reflection of ideas, a means of transcribing not events as they have taken place, nor of human commentary of actual deeds, but of ideas and aspirations. As such, literature may be a more accurate reflection of the human mind than history or even philosophy. Therefore, if we are to acquire an understanding of this elusive concepts of leadership, it is necessary that we first …

An Evaluation Instrument For The Selection Of An Integrated Learning System, Sally Ann Draper Zoll Edd

Dissertations

The purchase and integration of integrated learning systems (ILSs) in schools is on the rise. Dissatisfied with stand-alone computers and software, educators are looking for a more sophisticated integration of computer technology throughout the entire curriculum, specifically, an ILS. Current research evaluating such systems is scarce. The purpose of this study was to develop an instrument that decision makers in school districts could use to evaluate an ILS at the pre-purchase stage. The instrument was designed expressly for school district personnel who have completed a needs assessment and have determined that an ILS will meet their needs. The instrument was …

Electrophysiological And Ultrastructural Analysis Of Subsidiary Pacemakers In The Cat Right Atrium, Donald S. Rubenstein

Dissertations

No abstract provided.

The Effect Of Science Inservice Programs On The Self-Efficacy Belief Of Elementary School Teachers, P.A. Moore Edd

Dissertations

The Problem: Science education at the elementary level has not been successful. As a nation we are producing fewer and fewer scientists and science teachers, as evidenced by the narrowing of the pipeline of students entering science classes in high school and beyond. Since a student's interest in science begins at the elementary level, any improvement in science education in these grades will help ameliorate the trend toward science illiteracy. Such an improvement rests on three critical areas: the teacher, the curriculum, and the methodology. Since preservice programs do not include rigorous science requirements, it is necessary to supplement teacher …

Personal And Organizational Variables Related To The Strength Of Mentoring Relationships In Nursing, Willa Fields Dnsc

Dissertations

Mentoring is viewed as a viable developmental process for nurses that promotes professional maturation, career satisfaction, and strong, competent leaders. Personal and organizational variables related to mentoring, such as mentoring potential, professional success, immediate organizational climate, general organizational climate, and experience as a mentee, have been described in the theoretical and research literature. A conceptual model for this investigation was developed which related these variables to the mentors' perceptions of the strength of their strongest mentoring relationship. The purpose of this study was to establish the strength of the relationships delineated in the model. The model was tested on 125 …

The Effects Of Crosslinking On The Stability And Autoxidation Rate Of Human Hemoglobin A, Thao Yang

Dissertations

No abstract provided.

An Uncompromising Commitment To Mission: Mundelein College And The Advancement Of Women's Higher Education 1930-1950, Pauline Margaret Abraham Tarvardian

Dissertations

No abstract provided.

The Development Of Speech Pathology In America, 1890-1940, Ann O'Connell

Dissertations

No abstract provided.

A Dual Perspective Approach To Time In Descartes, Kathleen Kerrott Madden

Dissertations

No abstract provided.

Leadership Ideology And Institutional Development In The Public Junior College, 1900-1940, John H. Frye

Dissertations

No abstract provided.

Relationship Of Self-Efficacy Expectations To Academic Performance Of Law Students, Lily W. Adams

Dissertations

No abstract provided.

The Development Of Secondary School Mathematics Education In The United States, 1950-1965: Origins Of Policies In Historical Perspective, Mary Margaret Grady Nee

Dissertations

No abstract provided.

Administrative Motivations To Write Grants In Illinois Community Colleges, Donna Rudy

Dissertations

No abstract provided.

Managerial Unemployment, Dennis J. Stevens

Dissertations

No abstract provided.

An Investigation Of Personality Type And Role Performance Of Undergraduate Resident Assistant Applicants In Church-Related, Liberal Arts Colleges, Peter C. Lefferts

Dissertations

No abstract provided.

Correlation Between Particle Velocities And Conditions Of Abrasive Waterjet Formation, Wei-Long Chen

Dissertations

The velocities of water and abrasive particles in abrasive waterjet(AWJ) were measured by the use of Laser Transit Anemometer(LTA). A setup for the velocity measurement was constructed and a statistical technique was used to improve the accuracy of the velocity determination. A comparison of the magnitude of velocities determined by LTA, Piezoelectric Force Transducer and Schlieren Photograph clearly indicates the feasibility of the use of LTA.

The velocities of water and particles were measured for different diameters of water and slurry nozzles, abrasive mass flow rates and particle sizes. The performed experiments enabled us to evaluate the effects of conditions …

A Model Of Registered Nurse Intent To Stay In Southern California Childrens' Hospitals, Linda Diann Urden Dnsc, Mn, Rn, Cna

Dissertations

The purpose of this study was to examine the interrelationships of professional image, organizational climate or domains thereof, professional commitment, organizational commitment, position satisfaction, and the influence of these variables on intent to stay employed. The path analytic model of intent to stay was temporally ordered and proposed that professional image and organizational climate affect intent to stay through professional commitment, organizational commitment, and position satisfaction. Subjects (n = 232) were both male and female registered nurses who worked per diem, part-time, or full-time on all shifts. They held clinical positions, delivered direct care, and had been employed in one …

Effects Of The Great Depression On Private Higher Education: Impact On Private College And University Planning, J. Michael Hostetler

Dissertations

Private higher education has suffered a loss of dominance in enrollment over the last four decades. Increases in tuition escalated making private higher education distinctly more expensive than options in the public sector. A sharp decline in the birth rate during the 1970s indicates there will be fewer high school graduates for private higher education to recruit. Some private colleges have already been forced to close, while others appear threatened by enrollment decline in the 1990s and beyond.

The Great Depression of the 1930s was a challenging period for the country and the academic community. To discover how private institutions …

Propagation Of Millimeter Wave Signals In Forests Using The Equation Of Radiative Transfer With Strong Forward Scattering Phase Functions, Nack Yang Cho

Dissertations

A forest is a highly scattering medium at millimeter wave frequencies. The propagation of cw millimeter wave signals in forests has been studied previously, both theoretically and experimentally. Published experimental data verified that continuous wave transmission is possible over lengths of the order of a few hundred meters and that a forest acts to strongly scatter energy in the forward direction. The cw studies yielded the determination of the range dependence, beam broadening effects and depolarization effects of millimeter wave signals in a forest. However, pulse broadening effects, which are of importance particularly in the case of digital signal transmission, …

Protein Separation With Mathematical Modeling For Chromatographic Operation, Hsien-Chih Ma

Dissertations

We have performed experiments and derived mathematical models for packed bed columns used for liquid phase chromatographic separations of proteins with impulse input of feed solutions. These models can now be used to describe the relationships between the elution characteristics (peak height, peak position, and shapes) and the operating conditions (flow rate and buffer conditions) of ion exchange and gel permeation column chromatography for protein separations.

The surface adsorption model was discussed relative to the nature of the mobile and stationary phases in ion exchange column chromatography for two distinct cases: with and without pore diffusion. For large solute molecules, …

The Effects Of School Size And Leadership Style On Teacher Job Satisfaction, Jon C. Haezebrouck

Dissertations

This study investigated the effects of school size and the principal's leadership style on teacher job satisfaction. Also studied was the relationship between leadership style and school size. Three standard control variables-sex, age, and ethnicity-were investigated to see if the sample showed any significant differences in satisfaction levels. A random sample was taken from 525 Michigan public high schools and their principals. The objectives of this study were to provide schools or school districts with criteria that could be used to make changes that maximize the achievement of both organizational and individual goals and to provide principals with information about …

A Content Comparison Of Nontechnical Curricula For Engineers, Bryan Lynn Lundgren

Dissertations

The purpose of the study was to compare and critique the nontechnical curricula content of three Bachelor of Science in Engineering (BSE) degree program model curricula. Curricula content areas that are similar were critiqued by employers of engineers. Model curricula importance and first year BSE nontechnical skill performance were rated by engineering supervisors. The main postulate is that differences among actual, model, and employer-desired nontechnical curricula are factors that may influence curricula change in engineering education. A secondary purpose was to investigate whether the proportion of nontechnical courses to total required courses in BSE college degree programs changed between 1975 …

Biodegradation Of Benzene And A Btx Mixture Using Immobilized Activated Sludge, Mayur Padamshi Lodaya

Dissertations

Aerobic biodegradation of benzene was studied using activated sludge immobilized in calcium alginate (immobilization by entrapment), and also attached to a silica based catalyst.support (immobilization by attachment). Hydrogen peroxide was used as a source of dissolved oxygen to eliminate physical removal of benzene due to aeration. Abiotic losses of benzene were accounted for.

A recirculation reactor, run in both batch and continuous feed mode, was used to determine the kinetic parameters. The system response was examined by tollowing changes in benzene concentration, flow rate, and biomass loading. The system was modeled mathematically and the kinetic parameters were determined.

Biological removal …

Bond And Fatigue Characteristics Of High-Strength Cement-Based Composites, Somboon Chimaphant

Dissertations

The results of a series of tests on a variety of high strength cementitious composites yield a model from which an empirical equation of general normalized pull-out stress vs. pull-out displacement relationship is developed. A new variable named the "Brittleness Index" is defined and used in the proposed equation. Additionally, the concept of maximum strain is used to predict the fatigue life of high strength concrete.

Three sizes of deformed bars and two types of steel fibers with four different volume fractions were used to observe bond-slip and pull-out characteristics of high strength concrete. The results indicate that the maximum …

Kinematic Synthesis Of Mechanisms For Multiply Separated Positions, Hyoung Jun Kim

Dissertations

The rigid body motion is studied in a combination of finitely and infinitesimally separated positions in planar, spherical, and spatial kinematics. A general new method for determining the locations of points and/or lines in a rigid body moving through finitely and infinitesimally separated positions is developed. These points and/or lines would satisfy the constraints of various types of binary links for planar, spherical, and spatial mechanisms.

A unified form of circle-point curve equation is derived for finitely and multiply separated position problems in planar and spherical motions. A graphical method to construct the circle-point and center-point curves and Ball point …

Anaerobic Biodegradation Of Trichloroethylene With The Addition Of Sugar Using Activated Carbon-Fluidized Beds, Suxan Huang

Dissertations

Anaerobic biodegradation of trichloroethylene (TCE) was carried out in a two-stage granular activated carbon fluidized bed bioreactor. The intermediate products were identified as: dichloroethylene (DCE), vinyl chloride (VC), 1,2-dichloroethane (DCA) and chloroethane (CA). Of the three geometric isomers of DCE, the trans-1,2 dichloroethylene (TDCE) was found to be the most predominant species, The production of DCA suggested a diverted reaction sequence from the conventional sequential reductive dechlorination pathway postulated in the past literature. CA was believed to be a product of VC and/or DCA. The co-substrate glucose was implicated for this reaction specificity. Based on our data and on other's …

Fault-Tolerant Interconnection Networks For Multiprocessor Systems, Hamed Mohamed Nassar

Dissertations

Interconnection networks represent the backbone of multiprocessor systems. A failure in the network, therefore, could seriously degrade the system performance. For this reason, fault tolerance has been regarded as a major consideration in interconnection network design. This thesis presents two novel techniques to provide fault tolerance capabilities to three major networks: the Baseline network, the Benes network and the Clos network.

First, the Simple Fault Tolerance Technique (SFT) is presented. The SFT technique is in fact the result of merging two widely known interconnection mechanisms: a normal interconnection network and a shared bus. This technique is most suitable for networks …

Air Stripping Of Volatile Organic Contaminants Using Rotating Disc Contactor, Kai-Ping Hsueh

Dissertations

Previous studies have suggested that the transfer of VOCs to the atmosphere by air stripping may be a convenient and potentially cost-effective method to remove these compounds from the water. A Rotating Disk Contactor (RDC), similarly to other aeration devices, can provide intimate contact between the VOC-bearing water and air. It is believed that under carefully selected operating conditions, the RDC system are more competitive with packed tower than other aeration methods. The objectives of this study were to evaluate the feasibility of using the RDC to strip VOCs from the contaminated water and to develop a mathematical model to …