Digital Commons Network^™

An Experimental Investigation Of The Kinetics And Thermal Properties Of Poly(Ethylene) Terephthalate And Its Related Di-Acid Modified Copolymers, Satish Baliga

Theses

Poly(ethylene) Terephthalate , PET, is synthesized from purified Bis-hydroxyethyl Terephthalate,(BHET), in the presence of antimony oxide catalyst. Rate constant for the polycondensation reaction, based on a second order kinetic model is found to be 152.4/mol/hr.

A new modified polyester Polyethylene Adipic Terephthalate (PEAT) is synthesized from BHET and adipic acid. The effect of adipic acid content in the copolymer,on the rate of polycondensation is studied. Adipic acid is shown to improve the activity of the polymer chain ends thereby increasing the apparent reaction rate constants.

The modified polyesters are observed to melt at a lower temperature than PET. Moreover, the …

Management Concept For Consumer Services Via Microprocessor Systems, Thomas William Bradshaw

Theses

With the proliferation of home computers and the subsequent ability to communicate with retail establishments, an opportunity exists for alternative delivery of goods and products to residential consumers. This paper explores the establishment, management, and problems associated with these burgeoning enterprizes.

Presently, there are several technologies and market strategies under devlopment which stress the convenience of making purchases. In addition to home computers there are other communication networks using different protocols such as videotext which consists of several arrangements of text and graphical protocols. In addition there are several mediums like cable and videotext by which product information can be …

X-Ray Fluorescence Spectroscopic Analysis Of Coal Ash, George Patrick Watson

Theses

Several coal ashes and prepared mixtures were analyzed by x-ray fluorescence spectroscopy. Various techniques were studied to determine the most reliable procedure for quantitatively estimating, from fluorescent peak intensities, the concentrations of seven major oxides typically present in the ash. These ashes were analyzed with only minimal sample preparation. In order to determine the self-consistency of the procedure, several mixtures of known composition were prepared containing the major elements present in an ash.

Because of inter-element absorption and enhancement effects, several computational techniques were used to calculate composition from spectrum peak intensities. The method that yielded the most accurate estimates …

Untitled, Gerry Thies

Theses

Not Included

A Survey Of The Reading Interests Of The Middle School Student, Kathleen Irene Hettich

Theses

The purpose of this study was to determine the reading interests of middle school students ranging in age from 10 to 14 years. The middle school has grown tremendously in acceptance since its beginnings in the 1960's. Years of study, careful planning, and evaluation using pilot schools preceded the success of this new grouping of students, usually consisting of grades six, seven, and eight. However, one aspect of the middle school did not receive the attention it deserved. Little can be found in a review of research on student use of the middle school library. Studies were directed either to …

Simulation Of Particle Size Distribution In Continuous Emulsion Polymerization Through A Modified Population Balance Approach, Ying-Yuh Lu

Theses

A detailed mathematical model for particle size distribution in continuous emulsion polymerization of styrene and vinyl acetate is proposed on the basis of the population balance in the presence of several kinetic and mass transfer processes. This study is limited to the Smith-Ewart case II, which assumes instantaneous free radical termination within polymer particles. Radical desorption mechanism from polymer particles is included in the model and the desorption rate is formulated from the diffusion theory which suggests that the rate coefficient should be inversely proportional to the surface area of polymer particles.

Spectral Method Of Color Conversion Filter Thickness Applied To Simulation Of Cie Illuminants, Paul Butterfield

Theses

A spectral method of determining color conversion filter thickness is described. This method uses spectral data from system parameters to determine thickness. Optimization of the input distribution by varying bulb current is discussed. Using the spectral method of thickness variation, two CIE Illuminants, D55 and D65 were simulated. The simulators were measured for goodness of fit and showed a strong similarity with their respective simulators. Mean square deviations were calculated for each Illuminant and were 11.09 and 11.33 for D55 and D65 respectively.

The Visual Box, Candace Lorimer

Theses

Not Included

Around Me: A Photographic Journey, Jean-Paul Debattice

Theses

None provided.

Geometry And Vision To Galen, Mario Biagioli

Theses

None provided.

Constructed Clothing: Fiber To Finish, Catherine Grota Sahlin

Theses

None provided.

The Horse: Structure And Form In Nature, Karen Ackoff

Theses

None provided.

Gesture And Attitude, Stephen Piper

Theses

I intend to explore, with a small format camera, people's gestures and physical attitudes and the way in which these are enhanced by their relationship to the environment.

Tract, Bil Jaeger

Theses

Not Included

Prediction Of Enthalpies Of Mixing With A Unifac Model, Dinh Dang

Theses

A modified UNIFAC model is used in the correlation and prediction of enthalpies of mixing. The model requires two interaction parameters per group pair and values for 172 such pairs are presented here. Excellent prediction results are obtained with typical errors, in the temperature range of 273°K to 400°K, below 15%. For systems containing cyclic compounds, somewhat poorer results may be encountered.

Three Studies On Airborne Polycyclic Aromatic Hydrocarbons, Carol Sophia Eveleens

Theses

Three studies have been conducted on polycyclic aromatic hydrocarbons found on airborne particulate matter. The first investigation involves the determination of fly ash "activity" in the reaction of two PAHs adsorbed on its surface. Mass spectrometry is used to monitor the exchange of hydrogen and deuterium atoms between anthracene and anthracene-d10. The results indicate that some fly ashes exhibit "activity" in the reactions of PAHs adsorbed on its surface. The second investigation involves the determination of cyclopenta[cd]pyrene (CcdP) and benzo[ghi]flouranthene (BghiF) on samples of airborne particulate material collected from two automobile traffic tunnels. Glass capillary gas chromatography with a precolumn …

Investigations Into Rates And Mechanisms Of Mercury Depuration In The Killifish, Fundulus Heteroclitus, Joanne A. Korpanty

Theses

Metallothionein (MT) and glutathione (GSH) have been shown in mammalian research to play a role in the sequestration and depuration of mercury. The sulfhydryl groups on both these peptides have a strong affinity for mercury, MT for Hg²⁺ and GSH for CH₃Hg⁺. In this study, killifish (Fundulus heteroclitus) were force-fed one piece of squid laced with labelled mercuric nitrate to give a final food concentration of 20 ppm ²⁰³Hg²⁺ and 0.03 -0.05 µg g-1 Hg²⁺ total dose. Most of the mercury, 84.1 ± 12.1% (mean ± standard deviation), is depurated within the …

Characterization Of Tdi-Hema Homopolymer Prepared Via An Immiscible Solvent System. Synthesis And Investigation Of Oligodichloroketene, Manuel Montero

Theses

The objective of this thesis has been divided in two parts.

The first part is subdivided into two areas. First a "Universal" calibration curve for gel permeation chromatography (GPC) was construc-ted using different molecular weight standards of PMMA and MMA-HEMA co-polymers. By measuring the viscosity of the different molecular weight solutions and calculating the Vr, (retention volume), from GPC data, plots of In [ η ] Mw against Vr and In Mw against Vr are obtained. These curves can be used to obtain the molecular weight of any linear (not crosslinked) copolymer by simple measurements of viscosity and GPC data. …

The Involvement Of Labor Unions In Policies Of Worker Safety And Health, Kenneth J. Dzierzawiec

Theses

American workers are exposed to many seen and unseen hazards in their working environment. As the potential hazards in the workplace became more complicated, so too did the analysis of these hazards, as well as the means of endeavoring to protect a workers safety and health.

In the period between the 1920's and the 1960's the major thrust of Union demands were in the areas of economic gain. Although there was concern for worker welfare.

The period of the late 1960's through the early 1970's brought with it a new outlook on industrial practices as compared with worker welfare and …

Computer Simulation For Studying The Performance Of Plasticating Extruders, K. S. Govindaraju

Theses

A Computer program for simulation of a single screw plasticating extruder is presented. The computer program simulates the performance of different size extruders with various screw geometries for plasticating and pumping different thermoplastic resins. The simulation yields valuable information on the performance of an extruder for a variety of operating conditions. The simulation program provides a means of separating the effect of one variable at a time on the overall performance of the extruders.

Tourist Development And Environmental Impact Of Future Airport Construction In Athens, Greece, Vasilios Michael Halkias

Theses

The present thesis is an overall study of the suitablility of the eastern region of the Attica Peninsula in Greece, for a Tourist Development. The future construction of the new International Airport of Athens within the region is a significant factor that has been taken into account for the study.

It also examines and projects the Environmental Impacts due to the Airport construction.

The description of the studied area is presented by maps and refers to the Environmental Inventory. This Inventory examines the Water Resources of the region, Topography, Land Uses, Transportation System, Air and Noise Quality, Archaeological Sites, Utilities, …

Recruiting Techniques To Detect Truth And Personality, Franklin Keith Howard

Theses

Organizations today increasingly rely upon new measures of detecting employee honesty. Such approachs including lie detectors, handwriting analysis, voice stress tests, have their supporters and detractors.

This thesis will specifically concentrate upon the phenomenon of lie detectors...its origin, application and evaluation.

This thesis covers reasons why employers use these techniques, controversial issues centered around their use, legal implications, and their outlook in the employment setting.

Finite Element Analysis Of The Behavior Of Foundations Over Cavities In Soluble Rocks, Borhan Huang

Theses

Soluble rocks contain sinkhole that affect the strength of the rocks. In designing foundations in and on these formation, the effects of cavities have to be taken into account. In this study, an axisymmetric formulation has been developed to study the behavior of circular footings over spherical cavities. Parametric studies have been conducted varying the sizes and locations of openings. An approximate procedure has been employed to generate the stiffness matrix of the system. Error analysis and convergence study of the results have been performed.

A Comparison Of Collective Bargaining Issues Within The North Jersey Construction Industry, Edward G. Keane

Theses

This study was conducted in order to explore the recent developments within the Construction Industry Collective Bargaining process which have become evident in the southern, western, and the southwestern states.

Through a comparison of the current developments in the North Jersey area with those in the South and West, it will be suggested that the North Jersey Construction Industry will soon be dominated by Open Shop Contractors. It will be demonstrated that the primary reasons for this shift from union labor to non-union labor is due to the high overhead of union labor created by union fringe benefit funds, and …

The Effects Of Feedback On Operator Performance In A Production Environment, Diane L. Knoll

Theses

The objective of this thesis and it's associated research is to analyze the positive effects of feedback in a production environment. The experimental data was collected at the Ortho Pharmaceutical Corporation in New Jersey and a subsidiary company, The J. T. Clark Company, in Illinois.

The experiments involved three types of feedback indirect feedback provided to a large group of packaging operators, direct feedback provided to a small group of temporary packaging operators in a training situation, and direct feedback provided to an entire workforce of operators performing dissimilar, but interrelated tasks.

The results of these experiments were consistent with …

Effects Of Two Chelating Drugs On Trace Element Metabolism In The Rat, Thomas J. Solecki

Theses

Numerous drugs have structures which suggest that they and/or their metabolites are likely to be chelating agents and therefore might affect trace element metabolism. For some drugs, their therapeutic activity or side effects may be due to this chelating potential. Ethambutol, used in the treatment of tuberculosis, is an example. There is also evidence that other drugs, such as alpha-methyldopa, may possess this potential; although its primary therapeutic action occurs via mechanisms other than chelation. The objective of this thesis was to determine the effects of ethambutol and alpha-methyldopa on tissue metal concentrations and balance of four essential trace metals: …

A Systematic Program For The Management Of A Sanitation Function In The Food Industry, John Joseph Sprainitis

Theses

The sanitation of food processing and packaging facilities is a labor intensive activity. As with any labor intensive operation, effective planning and control of the manpower is necessary. The more effective tie management, the more effective and productive the manpower will be.

As the effectiveness of the management improves, the cost effectiveness of the manpower will improve.

In dealing with the manufacturing of foods, there are numerous government regulations, of which sanitation plays a key role. Misunderstanding the impact of these regulations, and either over- or under-reacting to them, can result in unnecessary costs or severe problems.

In order to …

Implementation Of Dbase Ii In Inventory Management By A Small Firm, Shih-Chieh Wang

Theses

No abstract provided.

Risk Assessment For New Products In Office Automation, Dolores Ann Canale

Theses

As investors survey the industrial growth of technology for the late 1980's one area leading the range for large potential growth is the area of office automation. Though this area has been under heavy speculation by many large firms (such as IBM, AT&T and EXXON) for the pass ten years it still remains an unexplored market for many investors. The objective of this research paper is to study the risks companies. will face developing products for this horizon.

Investors believe that success in this area, as well as, many other areas of engineering rely in large measure on the willingness …

The Detection Of Partial Discharges In Transformer Oil, Gerald J. Fitzpatrick

Theses

The level, meaning the number and the intensity Of partial discharges that occur in transformer oil per time period of applied pulse when a high voltage is applied can be used as a measure of the quality and remaining life of the oil. The level of partial discharges at a given applied voltage can be correlated with the degree of contamination of the oil by impurities such as water and conductive particles and can be used as an indicator of the proximity of the oil to breakdown. There are several approaches to the detection of partial discharges, e.g., acoustic measurements, …