Digital Commons Network^™

Transmogrification, Vincent Peter Massaro

Theses

None provided.

Conformational Studies Of Carboxymethylcellulose In Aqueous Saline Solutions As A Function Of Ionic Strength, Donna M. Marcera

Theses

The conformation of carboxymethylcellulose (CMC) in salt solutions was studied using viscometry, light scattering and gel permeation chromatography. From the viscosity data, the conformation of CMC in aqueous saline solutions was determined to be elliptical. At high ionic strengths, for example 2.5N NaCl, the macromolecule collapses upon itself. The gel permeation chromatography data indicated the presence of large molecular weight CMC particles (~2 x 109 daltons). The light scattering data also showed the presence of large CMC particles. The presence of large CMC particles explains the change in concentration dependence of the viscosity data between low and high CMC concentrations. …

Repose, Diane Blazy

Theses

None provided.

The Art Of Rokusho, Mark Williams Morgan

Theses

None provided.

Dziadziu: A Walk With My Grandfather, Paul V. Chaplo

Theses

None provided.

Synthesis And Study Of Polymers Containing Inorganic Ions, Lateef Aderoju Ibikunle-Sofoluwe

Theses

Cupric and ferrous polyacrylates have been prepared and studied. It was thought that partial reduction of Cu²⁺ or Fe³⁺ or oxidation of Cu⁺ or Fe²⁺ might result in semiconducting behavior but no such effect has been observed. Nevertheless, the results obtained are of considerable interest. Quantitative gravimetric and volumetric studies of cupric polyacrylate precipitation from varying molar ratios of cupric chloride and sodium polyacrylate in aqueous solution have shown that the only product formed is Cu(PA)₂ (Where PA represents an acrylate mer in polyacrylate). The insolubility of the product indicates that much of the Cu …

Dioxin Formation : Thermodynamics And Reaction Pathways During The Oxidation/Incineration Of Chloroaromatics, Sanjiv Narendra Patel

Theses

Enthalpy, entropy and heat capacity property estimation for cyclic molecules using Benson's group additivity method require the use of ring correction terms. Ring correction terms are estimated from the thermodynamic properties of the cyclic molecule being considered. In the absence of litera¬ture values a procedure is proposed to predict these thermodynamic values.

Benson's Group additivity method does not fully account for the interactions between bulky group or atom substituents on the aromatic ring. In order to have accurate thermodynamic properties for these compounds, a data base is generated with ortho, meta and Para interactions for (Cl-Cl), (Cl-OH), (OH-OH), (CH_{3 …}

Degradation Of Refractory Organic Pollutants In Tar, Water And Soil Matrices By Ozone Or Hydrogen Peroxide With Ultraviolet Light, Liang-Jiun Uang

Theses

The objective of this research is to develop a method to degrade refractory Tar materials, higher molecular weight 3-5 ring Poly Aromatic Hydrocarbons (PAH's) or degrading these highly refractory PAH structures so that they are amenable to further treatment by biological or chemical methods. The process utilized to achieve this is to treat contaminated soils or tar materials with hydrogen peroxide or ozone plus ultraviolet light. Analysis of 27 specific PAH's was done by gas chromatograph (Flame Ionization Detection) for the reactants and products. The contaminated soil showed significantly lower levels of these PAH's after treatment.

Formation And Characterization Of Thin Superconducting Y-Ba-Cu-O Films, Gyusuk Kim

Theses

Thin Y-Ba-Cu-O superconducting films were fabricated reproducibly on MgO (100) substrates by two different processes ; (1) deposition at a low substrate temperature fiom a single sintered YBa₂Cu_3.3O_x target using RF diode reactive sputtering followed by a post-annealing at around 830 ° C ; (2) deposition at the crystallization temperature under oxidizing atmosphere. The superconducting properties of films deposited by process (1) and (2) were studied. The variation of film composition and thickness as a function of distance from the target gas pressure and distance between target and substrate was studied. The Dependence of the …

Three-Dimensional Stress Analysis Of The Femoral Midshaft Utilizing Computed Tomography And Finite Element Analysis, Peter F. Marion

Theses

Recent advances in computer technology have provided both the medical community and biomedical engineers with a method for noninvasively evaluating the internal structure in a way not previously possible. A three-dimensional finite element model of a midshaft section of the femur was generated, utilizing Computed Tomography scan data. The CT scan data file was introduced into an edge-detection algorithm and a file of geometric edge data was generated. This edge data was introduced into a solid modeling Computer-Aided Engineering software package to produce a three-dimensional solid model. A mesh generation procedure was then used to create a three-dimensional finite element …

Adaptive Fir Digital Filter Design And Simulation In The Noise Reduction System, Jack Jiabing Pang

Theses

The adaptive FIR digital filter is designed to suppress the noise in the tape recording and audio communication systems. The cutoff frequency of the digital FIR filters can be varied adaptively depending on the energy level of the input signal. In audio communication, especially, in tape recording systems, the noise obviously gets much bigger, when the frequency band of the system increases. The noise reduction system makes use of a phenomenon called masking, where the big signal-to-noise ratio makes human ears not sensitive to the noise. In a constant interval time, the system detects the signal level and compares the …

Computer Integrated Manufacturing : A Systems Approach For Small Manufacturing Enterprises, Sanjeet Jagdish Patel

Theses

This work is dedicated to small manufacturing enterprises seeking to explore Computer Integrated Manufacturing (CIM) technology, which is the recent trend in the manufacturing world. The main therie of this thesis is to improve productivity, product quality and reliability and reduce costs by integrating various disciplines.

Generic manufacturing functions including order entry, inventory control, manufcturing planning and control, automated drafting, direct numerical control etc. were enhanced by the effective utilization of low end workstations grouped together into a network and equipped worth industry standards software.

The introduction of computers into a manually resourced system yielded significant results such as reduction …

Sputter Deposition And Characterization Of High Tc Superconducting Thin Films, Vipulkumar Patel

Theses

Preparation of thin superconducting films by direct RF sputter deposition on Si, MgO, SrTiO₃ and quartz substrates and silver and Sl3N4 buffer layers (deposited on silicon substrates) was studied. To study resistance versus temperature characteristics of thin films and bulk materials, a computerized measurement system was developed. 1-1.5 pm thick YBaCuO films deposited on Si₃N₄/Si were found to be insulating with room temperature resistance higher than 236KΩ, while films with Ag as a buffer and/or a passivating layer exhibited metallic behavior with room temperature resistances lower than 700mΩ. The area directly under the 2.25 inches …

Testing And Modelling Of The Cleaner Wick System For In-Situ Treatment Of Contaminated Groundwater Plumes, Sanjiv I. Shah

Theses

The cleaner wick system, a modification of wick drains; a technology in recent use to consolidate low permeability soils, is proposed to treat contaminated groundwater plumes. Laboratory experiments on surrogate contaminants produce satisfactory results. Theoretical models are developed utilizing the cleaner wick system to treat volatile organic contaminants by air stripping and adsorption on granular activated carbon.

Treatment Of Trucking Station Wastewater By Two-Phase Anaerobic Digestion System And Rotating Biological Contactor, Tzu-Wen Uen

Theses

The wastewater produced as a result of trucking station activities has some major characteristics such as high COD (26,880 mg/1-42,925 mg/1) and BOD (12,278 mg/1-7,265 mg/1), high COD to BOD ratio (3.49-3.69), high pH range (3.72-11.7), and high grease content (480 mg/1-1,960 mg/1). Therefore, prior to any treatment, it is important to provide some sort of pre-treatment for pH adjustment and grease/oil removal.

The present laboratory investigation has indicated that successful treatment and purification of the subject wastewater is possible using two-phase anaerobic digestion system followed by rotating biological contactor. More than 90% of both COD and BOD was removed …

Development Of A Flexible Control And Automated Data Acquisition System For Wear Testing, Wen-Long Yao

Theses

The purpose of this work is to develop a flexible control and automated data acquisition system for wear testing procedure. A programmable logic controller (PLC) control philosophy and PC-based automated data acquisition system (DAS) were designed and organized for the wear testing machine in Surface Engineering Laboratory of Mechanical Engineering Department. The designed and performed separation of control and acquisition strategies saved a lot of engineering interface communication time. Several instrumentations and mechanism designs, such as selected RTD sensor, modified testing shoe for RTD installation, designed controlled lubrication mechanism, and designed load-unload mechanism, have been performed to fulfill the concerned …

Quantitative Determination Of Formaldehyde In Ambient Air, Wen-Shao Chou

Theses

Formaldehyde has been shown in the laboratory to play a critical role in the chemistry of polluted air. The method which we discuss in this paper was evaluated under practical field conditions in the Northern New Jersey Staten Island Urban Air Toxics Project. Formaldehyde in ambient air is concentrated and derived by passing a known quantity of air through a silica column impregnated with 2,4-dinitrophenylhydrazine (DNPH). The silica is eluted with acetonitrile and the concentration of formaldehyde is determined by High Performance Liquid Chromatograph (HPLC) with UV detection. A description of procedural details for coating silica cartridges with 2,4-DNPH acidified …

Concept And Analysis Of The Application Software Development Pool, Paul Walter Bette

Theses

This study investigated a new organizational structure within the data processing field. In an attempt to curb job turnover and improve job satisfaction within a typical application software development environment, the concept of the Application Software Development Pool (ASDP) was developed. To identify differences and employee reactions to implementing ASDP's organizational structure versus a more conventional data processing organizational structure, 15 employees participated in a conventional DP group and 15 were assigned to the ASDP group. Job satisfaction questionnaires were distributed both before and after the six month implementation period. Data analysis revealed significant differences between the two groups. The …

Studies Of Nitro-Pah On Ambient Air Particulate Matter, Yadan Wang Chen

Theses

A rapid, simple method for routine trace analysis of four isomeric nitropolycyclic aromatic hydrocarbons (nitro-PAH) (1-nitropyrene, 2-nitropyrene, 2-nitrofluoranthene and 3-nitrofluoranthene) in ambient air particulate matter is described. Two types of air particle sample (TSP and IP10) were collected and particle extracts were prefractionated by thin layer chromatography and the appropriate zones of interest analyzed by reversed-phase HPLC with UV and fluorescence detection. The study of Zn/Si post-column reaction chamber and oxygen scrubber for catalytic reduction of target compounds is also described. Six nitro-PAH compounds were identified in TSP and five in IP10 air particle samples. The results of identification and …

Kinetic Mechanism Of The Reactions Of Dichloromethane And Chloroform With Atomic Hydrogen At Low Pressure And Room Temperature, Jia-Ling Linda Young

Theses

The reaction mechanism of dichloromethane reaction (DCM) with atomic hydrogen in a flow reactor at room temper¬ature (300 K) and low pressure (2.1 - 2.7 torr), argon bath gas, has been developed in this research to analyze the above reaction system. The important addition reactions of radicals (or atoms) to olefins and the radical/radical (atom/radical) combination reactions have been analyzed using the bimolecular version of the Quantum-Rice-Ramsperger-Kassel (QRRK) theory.

The detailed reaction mechanism satisfactorily fits the experimental data for the reagent (DCM) conversion from previous experimental over a initial ratio (atomic hydrogen to dichloromethane) range of 6.8 to 40. The …

Application Research On Wastewater Reuse For Petrochemical Refining Industry In Taiwan, Lih-Shyan Lee

Theses

Nowadays water conservation and pollution abatement are needed to provide increasingly higher levels of treatment for industrial wastewaters.

Reducing treatment costs give us the incentive to minimize the volume of Wastewater effluent. Also, the national goal of zero discharge of pollutants to the waterways by 1985 provided further incentive -to minimize the flow of wastewaters.

A successful treatment of the wastewater discharged from the secondary effluent of the petroleum refinery plant to economically acceptable conditions offers a challenge to our technology.

Through this research, it is concluded that the excellent effluent water qualities produced from filtration and granular activated carbon …

Benzo(A)Pyrene Ingested From Composite Meals : Analysis And Method Development Related To Total Human Exposure, Che-Han Hsu

Theses

Polycyclic aromatic hydrocarbons including benzo[a]pyrene (BaP) have been known for many years to be environmental carcinogen. Moreover, B(a)P has often been used as an indi¬cator for the carcinogenic potency of environmental matter. One of its exposure pathways, ingestion, may possibly be more important than other routes, conventionally studied such as inhalation. The purposes of this thesis are 1) to analyze the B(a)P concentrations in weekly composite and some daily meals obtained in the Total Human Exposure to Environmental Substances (THEES) study, 2) to develop techniques which can measure the levels of B(a)P in foods accurately and effici¬ently, 3) to compare …

The Kinetics And Mechanism Of Photo-Oxidation Of Acrylonitrile And Acetonitrile With Hydrogen Peroxide And Ozone In Wastewater, Jung-Yuan Yeh

Theses

The study presents three types of Advanced Oxidation Processes , Ozone with UV, Ozone with Hydrogen Peroxide in the presence of UV, Various Hydrogen peroxide dosages and PH levels in the presence of UV.

A reaction kinetic model was proposed. The reaction rate constants and mass transfer coefficients are determined by a series of experiments and the use of the Rosenbrock Hillclimb Optimization Algorithm in conjuction with the Fourth ¬Order Runge - Kutta method on a digital computer.

Experimental results indicated that the Hydrogen peroxide with UV at low PH level has been proven more effective for the treatment of …

Synthesis Of Strained Lactams And Study Of Their Energetics And Bonding, Jung-Chou Tsai

Theses

In order to measure nitrogen and oxygen ionization energies of planar and nonplanar lactams, four compounds were synthesized successfully. The comparison of these ionization energies provides a qualitative insight into how the charge distribution of strained lactams varies with molecular geometry. Of special interest was the different ability of amides to exhibit resonance, monitored most sensitively by the core electron energy of nitrogen in the compounds. The nitrogen core (1s) ionization energies for the two nonplanar amides, 1,3-di-tert-butyl aziridinone (405.00 ev) and 1-azabicyclo[3.3.1]nonan-2-one (405.47) each having pyramidal nitrogens, indicated a nitrogen more negative than that in the comparable planar amide. …

Fault Tolerant Benes Networks, Manoj Bhatnagar

Theses

A fairly large number of fault tolerant topologies have been proposed for the multistage interconnection networks in the recent years. However very few of these schemes have focused on the Benes network. This thesis presents two new fault tolerant architectures for the Benes network. The thesis includes algorithms to construct these fault tolerant networks from a Benes network and the reconfiguration procedure in the event of a fault. The hardware characteristics of both the fault tolerant networks have been analyzed and compared.

Uniformity Corrector And Signal Processing For A 160 X 244-Element Ir-Ccd Camera With Ptsi Schottky-Barrier Detectors, Paul D. Blume

Theses

An off-set-type, one point response uniformity corrector and the associated signal processing circuits was developed to be used for a 160 x 244-element IR-CCD camera with PtSi Schottky-barrier detectors. Image sensors with PtSi Schottky-barrier detectors exhibit two types of noise in the displayed video output, a temporal noise and a spatial fixed pattern noise. The performance of the image sensor, limited by the spatial noise which obscures low contrast detail and limits camera sensitivity, can be improved by a uniformity corrector. The uniformity corrector was constructed to substantially reduce the spatial noise in the output display by digitally subtracting a …

The Role Of African Women In Informal Industry : A Case Study, Ayorkor Eulalie Deganus

Theses

The informal industrial sector has in recent years been recognized by development agencies as an important area of economic activity which is capable of creating employment opportunities. This sector is also growing faster than its formal counterpart.

In developing countries, women dominate the informal sector by virtue of their traditional and unique roles in food processing, pottery and* basketry, alcholic beverage brewing, handicrafts, clothweaving, cosmetic manufacturing and a host of manufacturing activities. However due to a general misconception about the actual economic roles of women in society, very little attempt is made by development planners and agencies to improve their …

A Study Of Values And Managerial Practices, Po-Wen Chuang

Theses

The multinational corporations (MNCs) have been a major contributing factor to the rapid growth of the world economy since World War II. In recent years, multinational corporations are said to facilitate transfer of management techniques, thereby accelerating industrial growth, consumption, and a higher standard of living.

Research on multinational corporations has raised many issues, one of the most interesting issues being the transfer of technology within multinational corporations. Technology includes both the so called "hardware" technology such as capital labor ratio, product design and manufacturing methods, and "software" or managerial technology. Differences in managerial technology used by multinational corporations are …

The Magnetotransport Analysis Of Hemt Structures At Low Fields, Naghmeh Nouri

Theses

On the basis of a study on numerous HEMT structures, a simple and useful technique was established for the characterization of 2DEG layers. This technique utilizes the magnetic field-dependence of the resistivity and Hall coefficient of the HEMT structure, to determine the values of the sheet density and mobility of 2DEG in the presence of other parallel conductive layers. This method of analysis was compared with previously used techniques such as Shubnikov-de Haas and the etch removal of the parallel conductive layers. Through this comparison and several measurements it was found that this procedure gives reproducible values for the 2DEG …

Desiccation And Permeability Of Backfill Materials In Soil-Bentonite Walls, Hemendra J. Moradia

Theses

Soil-Bentonite Walls offer a cost effective solution to many groundwater problems in new and remedial work projects such as hydraulic barriers in dams, dewatering large soil cuts, and as part of pollution control systems around hazardous waste landfills. However, the performance of soil-bentonite walls in environments other then fresh water types is still a matter of great controversy. In recent years, some data on soil-bentonite backfill have became available. The data indicate change in properties of these walls with time of exposure and concentration of chemicals found in leachates. However, no research work is available in the literature on the …