Digital Commons Network^™

The Effect Of Chronic Low Level Lead Ingestion On Blood Pressure In Young Dogs, Thomas Robert Vetrano

Theses

The relationship between chronic, low level lead exposure and hypertension has been a controversial issue for nearly a century. This study was designed to examine if such exposure is capable of causing hypertension in young dogs. Twelve three-month old female hounds were split into groups of six and paired with their littermate. One group received a dose of 1 mg/kg body weight of lead daily (orally); the controls received equimolar sodium acetate. Blood pressures were determined using an indirect Doppler technique.

Similar blood pressures were recorded for both groups prior to lead dosing. After nine days of lead ingestion, the …

Coupled Flexural And Torsional Vibrations Of Beams, Sang Hwan Kim

Theses

This thesis deals with the vibration of a beam whose flexural and centroidal axis are not coincident. The elementary bending- twisting theory is employed to derive the equations of motion, in which the effects of rotary inertia are added to the bending displacements and the effects of warping are added to the twist. Bending translation is restricted to one direction so that one bending equation is used instead of two. The equations of motion are solved by using the boundary value problem. The exact natural frequencies are found from the frequency equation , which is obtained from the condition that …

Finite Element Modeling Of A Femoral Stem In A Total Hip Prosthesis, Robert C. Cohen

Theses

A three-dimensional model was produced to study of effects of stress on a femoral stem in a total hip prosthesis. Using the ANSYS General Purpose Finite Element Computer Program, a reproduction of the system was constructed for the loads acting on the hip joint at intervals of a walking cycle. With isotropic properties for cortical bone, cancellous bone, cement, and selected alloys, the model was generated using three-dimensional, isoparametric, eight-node, solid elements (STIF45). The model consists of over 700 nodes and 442 elements. This model can be used to produce computer calculated stress data, if disc storage space allows.

Behavior Of Thin-Walled Channel Shaped Reinforced Concrete Columns Under Combined Biaxial Bending And Compression, Subash Yalamarthy

Theses

Next to rectangular, circular and L shapes, Channel section may be the most frequently encountered reinforced concrete columns since they can be used as box wall for elevators. Nevertheless, information about the load deformation behavior is not generally available to structural engineers. Most of the investigations have been emphasized on the ultimate strength of column sections under combined biaxial bending and axial compression and the resulting interaction surface. No attention is paid to load deformation behavior.

Current code provisions do not provide adequate guidelines for assessing the strength and ductility of biaxially-loaded reinforced concrete columns. Therefore, this investigation is aimed …

Color Vision Tests Using A Calibrated Color Monitor Controlled By A Microprocessor, David Wolf

Theses

A feasibility study was performed to determine if colors on a CRT could be measured accurately and then controlled by a computer to provide a means of performing color vision tests. Benefits from using a calibrated computer/monitor system could be decreased testing time, exact diagnosis, and possibly the means of quantifing the degree of the deficiency. The Atari 800XL Computer with a Sakata color monitor were used for the experimentation due to their low cost, availability, and ability to create the largest number of colors of any computer in the same price range. The system was calibrated and color vision …

An Investigation Into The Penumbral Dose Of A Bloxel, (Block Element) Matrix-Design Block To Replace Currently Utilized Radiation Treatment Field Shaping Techniques, Theresa Ciccone

Theses

Presented here is an investigation to establish physical rationale for the acceptance by physicians of a new form of blocking device for radiotherapy. The focus of the investigation is on the percent dosage obtained in the penumbral regions created by 6 mm and 9 mm stepped-edge blocks, relative to a straight edge, when exposed to 1.25 and 18 MeV photons.

Thesis Photographs, Judith Hanlon

Theses

None provided.

The Effect Of Aerial Haze On The Contrast And Resolution Of A Photographic Image In Direct Application To A Low-Altitude, Remote, Pilotless Imaging System, Todd Eric Pegelow

Theses

A study of the effect of aerial haze on photographic images acquired through the use of a remotely-piloted imaging system has been completed. The project involved the design, construction, and implementation of a remotely-controlled airborne imaging system for the express purpose of collecting scientific data relating the contrast of an image to the altitude at which that image was exposed. Data was collected and analyzed and the results are presented here. The system was also evaluated with respect to its usefulness as a collector of scientific data. The conclusion drawn is that aerial haze had no effect on the contrast …

Valuation Of Retail Outparcels, Raymond H. Fricke

Theses

Unavailable.

Development Of A Handbook For Independent Studies In Small High Schools, Kathryn M. O'Connor

Theses

The purpose of this study was to develop a handbook for independent study programs for small high schools. Small private high schools in the St. Louis area were surveyed in regard to their independent study programs. It was found that schools using such programs were enthusiastic about the results they produced. Current literature also showed the value of independent study in promoting higher level thinking skills among students. The survey results and information gathered from current literature were then used to formulate a handbook for independent study programs at small high schools.

A Curriculum For The Gifted Kindergarten Program On The Lindenwood College Campus, Kay Hoffmeister

Theses

The establishment of a kindergarten for gifted children on the campus of Lindenwood College, St. Charles, Missouri, created the need for a curriculum designed to meet the special strengths and weaknesses of those who would attend.

While these children often possessed advanced skills in reading and math, they were still five-year-olds with certain emotional, social and physical limitations due to their young age.

Also, research suggested that high IQ scores and accelerated cognitive, left brain learning did not usually exist with high levels of creativity. Yet futurists noted that creative, divergent thought skills would be essential in the world of …

Medications, Patti Green

Theses

None provided.

Seakindly Furniture Designs For Yacht Interiors, Steve White

Theses

None provided.

Dye Imagery, Linda C. Brown

Theses

None provided.

The Problem Of Gelling When Silicates Are Substituted For Gum Arabic In Lithographic Fountain Solutions, David Wang

Theses

The fountain solutions used for lithographic offset printing are solutions combining several chemicals. Each consists of water, some weak acid, gum arabic and alcohol in some fountain solutions, and some additives such as a nitrate, phosphate, bichromate, etc. This paper is a study of using polysilicate material instead of gum arabic in lithographic fountain solutions. Also, to solve the problem of silicate gelation by using the proper ratio of chemicals. The gelling problem of silicate material may be affected by the concentration, pH value, organic solvents and impurities, etc. Any one of the above will make the silicate material gel …

A Stability Test Of Dry Silver Microfilm, Christopher Edwards

Theses

A research project has been completed, in which experiments involving temperature and humidity were performed on 3M experimental microfilm samples. The experiments dealt with humidity levels usual to file storage conditions and elevated temperatures to allow for accelerated aging studies. Arrhenius plots were used to extrapolate the results obtained to normal room temperatures. The data obtained indicated that the film has a life expectancy of 62 years at 30% relative humidity and 53 years at 50% when stored at 24 C.

Development And Experimental Verification Of A Revised Granularity Equation In Electrophotography, Kenneth Riehl

Theses

An equation to describe the granularity of an electrophotographic imaging system has been developed to include the density variance attributed to the paper and toner surfaces. Granularity, G=(JA, D measurements from two conventional electrophotographic copiers were used to validate the relationship. The results show good agreement with the overall shape of the G versus density curve, however the values are not consistent with estimated toner particle size. Clustering of the toner particles is suggested as the cause of the high G values.

Diploma Nursing Instructors And Student Perceptions Of Effective Clinical Instruction, Marilyn E. Huggins

Theses

This descriptive study of effective clinical instruction surveyed students and faculty in six St. Louis area diploma nursing schools. While many studies have been done attempting to define and evaluate effective teaming, it has only been recently that researchers have begun to explore the effectiveness of clinical education. Clinical experience is that hands-on, practical experience one receives while in a professional education program such as nursing, medicine or dentistry. These studies show variation and conflicting results. or the studies found relating to the effectiveness of clinical practice, the majority occurred with students other than diploma nursing students. This researcher-a diploma …

Digital Font Design: Alice, Lynne Garell

Theses

Not Included

An Inquiry Into Engineering Career Choice And Career Satisfaction, Gunars Bachs

Theses

The purpose of this thesis was to ascertain factors that motivate a person to study engineering, and to examine the aspects of engineering career satisfaction. This study was conducted as a survey by means of a mail questionnaire, which was distributed among graduates of New Jersey Institute of Technology. Another sample, comprised of master's degree recipients of NJIT who had received their bachelor's degree from other undergraduate schools, served as a control group.

Motivation factors and positive and negative aspects of the engineering career were established and ranked in order of their importance. A method to measure career satisfaction was …

Analysis Of Deflection Temperature Under Load, Anand M. Jagani

Theses

Deflection Temperature Under Load (DTUL) is an experimental value commonly used by designers to characterize a plastic in a high temperature environment. This value is currently measured by a standard test procedure specified by the ASTM D-648. A theoretical analysis of this test was made and computer programs were developed to calculate the Deflection Temperaure of Plastics Under Load based upon temperature dependent flexural modulus data and temperature dependent thermal properties of the plastics of interest. The results obtained from the theoretical analysis agree closely with the experimental values found in the literature for two resins. An analysis of the …

Experimental Quantification Of The Image Quality Loss Due To The Effect Of Screen Ruling, Chantana Tangseree

Theses

The purpose of this research is to measure the amount of image quality loss due to the effect of screening an image with halftone screens. This was done by using screens of different line number and images with differing amounts of image quality. Six black and white continuous tone positive originals were used to scale the image quality. These prints had been produced so as to have equal steps of image quality from the sharpest and ranging to some lower image quality which was at or slightly below a just acceptable level of image quality. Each of these images was …

The Gshell: A Graphical Command Language For Unix Operating System, Andrew Kitchen

Theses

The Gshell, a graphical command interpreter for Unix, and an executing and editing environment far the Gshell system are described. Through the use of a pictorial representation of command scripts the Gshell system provides a more powerful expression of concurrency than is possible with conventional Unix command languages. Its syntax and use is explained and major features of its underlying control and data structures are discussed from the point of view of the designer and the programmer.

Wrestling With Angels, Robert Cooper

Theses

Not Included

Urban Indians In San Diego: 1850-1900, Susan Hunter Carrico

Theses

No abstract provided.

A Validation Study For Four Tests Of Behavioral Cognition, Kenneth J. Kish

Theses

This study is a predictive validity study employing subjects who were currently employed as psychiatric nurses on the four locked psychiatric units at Barnes Hospital, in St. Louis, Missouri. The purpose of the study was t o examine the relationship of four tests of social intelligence or behavioral cognition, and on the job performance, looking for a correlation between test scores and successful job performance . The criteria of job performance employed in the study were five scales designed by the researcher according to the behaviorally anchored scales model of performance reviews. Employees were rated by their respective supervisors using …

The Effects Of Race On The Attitudes Of Children Toward Television Advertising, Kathleen S. Wallis

Theses

The purpose of this study was to determine if there are any significant differences in the attitudes of black as compared to white children toward television advertising.

Several researchers have previously concluded that the race of a child is a contributing factor to his or her attitude toward television advertising. However, these researchers compared black and white children in extremely different environments and from extremely different backgrounds. This study attempted to compare the attitudes of black and white children toward television advertising when those children live in similar environments, attend the same school, and are from similar socio-economic backgrounds.

A …

Corporate Investment Decisions And Security Values, Gary G. Lichtenberg

Theses

The study of the impact of the announcement of various investment decisions of firms on their security values has occupied a central role in research in the area of finance. One has merely to skim the title pages of finance journals to confirm this preeminent position. The studies, to date, have generally used the Capital Asset Pricing Model to analyze the impact of these announcements. The development of the literature in the area of contingent claim pricing provides a new methodology in tackling the above issues. This thesis uses the option pricing framework to study the effects of two specific …

Tensile Analyses Of Creep In Plastics Using The Finite Element Method, Frank A. Porter

Theses

The deformation, stress relaxation, stress recovery, creep rupture, creep buckling, and creep ratchetting aspects of creep are discussed with the emphasis on deformation of a plastic due to a tensile load. Two problems were run using the ABAQUS Finite Element Program: an axisymmetric steel pressure vessel with elliptical end caps, and a plastic rectangular beam in tension. The pressure vessel model was used to check the ABAQUS program against the literature. A graphical comparison of the stress results showed that the program showed the proper relationships and magnitudes to confirm agreement The plastic rectangular beam problem showed an error less …

The Selection And Conservation Of A Collection Of Nineteenth Century Architectural Photographs, Douglas Severson

Theses

Not listed.