Digital Commons Network^™

Calibration Of Flame Ionization Detector For Chlorinated Hydrocarbons, Nahid Jabalameli

Theses

Relative Responses and Calibration Factors were developed for several volatile organic (mostly chlorinated) priority pollutant species in order to use one single stable compound (e.g.Benzene) for daily instrument calibration. This would replace the procedure of using a standard mixture of target compounds (25-35). This is of particular advantage because the standard mixture may not have all species stable or may show loss of some components relative to others due to wall adsorption in the standard (compressed gas) stainless steel cylinder.

The use of a single standard species was made possible by developing "accurate" relative response and calibration factors of all …

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. …

Quantitative Evaluation Of Substituent Effects On Stabilization Energies Of Strained And Unsaturated Molecules, Tyler Arthur Stevenson

Theses

Thermodynamic stabilization energies are presented for a series of monosubstituted vinyl, cyclopropyl, ethynyl, and phenyl compounds. The energies are calculated using ab initio molecular orbital calculations at the 4-31G level, and also with published experimental heat of formation data. Correlation analyses are then attempted with the dual substituent parameter approach with the stabilization energies. The analyses are also attempted with a triple-parameter approach using Topsom's theoretically calculated X, F, and Ro constants. Among the findings are the facts that π-donating substituents correlate well, while π-accepting substituents do not. Indications of the relative sensitivities of hydrocarbon frameworks to substituent electrostatic and …

Performance Modeling And Simulation Of Multiple Microcomputer Systems, Moorthy Narayana Hariharan

Theses

Multiple processor systems are the logical choice for applications demanding high computing power, throughput and reliability. Moderately coupled Multiple Microprocessor systems can be applied to a variety of applications demanding high performance. The structure of Multiple Microprocessor systems is examined. Various interconnection structures are analysed for performance comparisons.

Queueing theory is a powerful tool in modeling and analysing Computer systems. Queueing models are developed for popular Multiple processor interconnection topolog es like the Shared memory, Shared bus, Star and Loop configurations.

The usefulness of Digital computer Simulation techniques in estimating the performance of Multiple processor systems is demonstrated through a …

Intelligent Computer Decision Systems, Robert J. Heath

Theses

This paper demonstrates that the concepts developed through Artificial Intelligence research are applicable to computerized information systems; and that a system of expert problem solvers and natural language interfaces exhibiting characteristics of "intelligent behavior" offer several advantages over present-day, conventional database management designs. Development of the conclusion was accomplished after an analysis and assimilation of the current literature in the field of Artificial Intelligence and participation in university symposia concerning its application to the business environment. It is concluded that incorporating the notions of learning and creativity, common sense(heuristics), and self-awareness, intelligent computer decision systems will provide managers with : …

Modification Of A Heat Transfer Program (Stan5) To Account For Surface Roughness And Its Application To Aerodynamic Icing, Parthasarathy R. Iyengar

Theses

In order to be able to predict the local ice accretion rate or the icing profile on an airfoil, it is necessary that a suitable heat transfer coefficient model be availabIe. A computer program has been developed which is capable of predicting the local heat transfer coefficient for a typical two dimensional icing surface. Because of the charecteristics of an icing surface, an existing computer program (STAN5) has been modified to include the effects of the following surface roughness surface curvature and boundary layer transition.

The computer program for the heat transfer coefficient has then been used with an existing …

Computer Analysis Of The Stefan Problem In Cryosurgery, Dong Hyuk Kim

Theses

Numerical solutions for determining the freezing front location vs time relation in cryosurgery are obtained by utilizing the heat transfer computer program TRUMP, which employs the explicit finite difference algorithm. The probe geometries of rectangular, cylindrical, and spherical shape with one dimensional heat flow are selected for study. Internal heat generation is considered in cylindrical and sphe¬rical probe geometries, and the difference between the solutions with and without heat generation is discussed. To verify the correctness of the TRUMP solution, comparisons are made in the freezing distance vs time relation with the Neumann's solution and the implicit enthalpy method for …

Decision Rules Applied To Spread Spectrum Signal Detection, Richard Jae Kim

Theses

Decision rules for detection of spread spectrum signals were investigated. For each decision rule, error and erasure probabilities were analyzed. The obtained data was used to plot PE vs Pe for constant signal-to-noise ratio (SNR). With the use of the probability of a word error curves the optimum threshold setting was found for a given SNR.

FSK (orthogonal signalling) and PSK (antipodal signalling) were considered for modulating the chips. When the PE vs Pe plots for FSK and PSK were compared, PSK performed better than FSK by a ratio of 6 dB.

Finally, analog and digital correlation of the received …

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 …

Implementing A Preventive Maintenance Program In A Pharmaceutical Manufacturing Plant, Daniel J. Shatynski

Theses

The goal of Preventive Maintenance is to reduce operating costs through greater equipment availability and lower downtime costs. Its intention is also to reduce the frequency and severity of corrective maintenance. A case study of a chemical manufacturing plant in the pharmaceutical industry is reviewer and symptoms are illustrated for purposes of definition. The development and implementation of a Preventive Maintenance program for this chemical manufacturing plant is proposed.

Management Improvement Study Of The Engineering Function In A Converting Industry Company, James John Slovak

Theses

A study was made to determine if the profitability of a converting company could be improved by expanding its engineering department. Process challenges were examined along with the present engineering function to determine difficulties. A case study of capital budget projects completed in the last three years revealed that potential savings were lost due to late and incomplete projects. The conclusion is that profitability can De increased through process control improvements and more timely completion of capital projects by expanding the present engineering department.

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 …

Plate Buckling Under Biaxial Patch Loading, Herli Surjanhata

Theses

This thesis is concerned with the buckling of rectangular plate-shaped elements under biaxial compressive loading with patch loading along one pair of opposite edges. The loading along the other edges is continuous but the discontinuous loading covers different patches along opposite edges. All the applied loads are uniformly distributed. The critical buckling load of this type of plate element is an important factor in the optimal design of many types of thin-walled structures. Frequently the nature of the problem prohibits an exact or even a general form of solution, thus dictating a numerical approach.

The problem has been attacked to …

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

Theses

No abstract provided.

An Investigation Of Characteristics Of Blood Velocity In A Simulated Circulation System, Yung-Gang Wu

Theses

The major objective of this thesis is to find the relationship between the blood velocity and the stenosis of the vessel. Tests were performed with different degrees of stenosis at varied logitudinal positions from the testing probe in the vessel of a Z-80 microprocessor controlled artificial circulation system.

Three methods were used to detect the velocity in the vessel: continuous wave Doppler, Pulse Doppler, and a hot-film device. The first method can get the average velocity, while the latter two have the capability to find a velocity profile, and all are important indicators to the arterial occlusion phenomenon.

An analysis …

Flow In A Channel With An Abrupt Change In Area : Finite Element Method, Ching-Fu Yu

Theses

Steady flow with an incompressible non-viscous fluid in a two-dimensional channel with an abrupt change in the width of its flow passage has been studied with a finite element method and a complex potential method.

The flow problem was solved with the use of an existing finite element program, FLOW2, in terms of the velocity potential and the stream function. The general procedure of solving problem by finite element method and the user's guide of FLOW2 program are presented in this thesis.

A computer program, EXACT, has been written for the exact solution based on the complex potential method to …

A Model Of Heat Transfer By Conduction And Radiation In Fluidized Bed, Kouadio Kouame

Theses

A model of heat transfer by conduction and radiation in fluidized beds operating in the bubbling regime is proposed. The analysis of the combined conduction and radiation is one dimensional and is based on the emulsion packet model. The problem is formulated in terms of a non-linear partial differential equation which is transformed into an ordinary differential equation by using the similarity transformation. The packet emulsion phase is assumed to be a semi-infinite medium which absorbs, emits and scatters thermal radiation. Moreover, the packet emulsion phase is considered to be under optically thick condition. Radiative transfer during bubble contact is …

Magnetohydrodynamic Synchronous Generator With Exhaust Divertor Plasma Of Fusion Reactor, Prabir Kumar Majumdar

Theses

It is the intent of this thesis to develop design concept of a MHD-Synchronous generator for generation of A-C electric power utilizing the exhaust divertor plasma of Tokomak fusion reactor.

The main physical structure of the MHD-Synchronous generating system consists of (1) a linear induction accelerator at the divertor channel to accelerate the plasma velocity sufficient enough to provide rotational effect on the exhaust cylinder by turbine action; (2) a D-C field coil as a source of magnetic field at the entrance of the exhaust chambers; (3) turbine blade on the upper portion of the cylindrical current sheet and (4) …

Computer Simulation Of Electro-Static Field Potential To Study The Effect Of An Animal On The Electric Field Between Two Charged Plates, Shekhar Gajanan Potdar

Theses

This thesis deals with plotting of equipotential lines in an electrostatic field created by two parallel charged plates. Between the plates lies a dielectric cage inside which an animal (rat) is kept, on whom anatomical tests are to be carried out after exposing it to a certain electric field intensity for a given period. Values of the actual field to which the animal is exposed can hardly be obtained experimentally. Computer simulation in this case becomes a powerful tool. Starting with the uniform field ideally created between two parallel plates, it is then neccesary to find the effect of the …

Techniques For Measuring Critical Loads In The Presence Of Non-Negligible Higher Mode Imperfections, Rajendra W. Ranadive

Theses

This thesis is concerned with the Southwell Plot method for measuring the critical load of thin-walled structural members whose postbuckling behavior is stable-symmetric.

In this method measurements are taken of the structure's central lateral deflection versus membrane compressive load P. Southwell's hypothesis is that (on a graph of δ/P vs. δ the reciprocal of the slope gives the critical load. He suggests that this is valid because the effect of the fundamental imperfection predominates as the load approaches the critical load+

The writer has examined Southwell's hypothesis in the presence of non-negligible (in fact dominant) higher mode imperfections. The writer …

The Determination Of So3 And So2 In Stack Gas By Collection In A Buffered Formaldehyde Solution, Peter Frank Romeo

Theses

A new method for the determination of sulfur dioxide, SO₂, and sulfur trioxide, SO₃, in stack emissions was developed due to questionable results obtained from the EPA Method 8. This new method is a wet chemical procedure utilizing a pH 4.0 formic acid- sodium formate buffered formaldehyde solution to collect both SO₂ and SO₃ in the same solution. The absorbed SO₂ forms a stable adduct, hydroxymethanesulfonate, HOCH2SO₃^-, in solution with formaldehyde. The SO₃ is absorbed as sulfuric acid, H₂SO₄. The SO₃ is determined as …

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 …

Acrylamide Effects On Nerve Terminal Enzymes, Christopher S. E. Marlowe

Theses

Acrylamide causes a peripehral neuropathy. The biochemical mechanism by which it does so is the subject of intense investigation. One of the principal hypotheses for this mechanism centers on acrylamide's ability to inhibit glycolysis. This study examines the effects of in vivo exposure to acrylamide on the enzymes of the nerve terminal particle, the synaptosome.

A method for measuring glycolytic enzyme inhibition in the synaptosome was developed. Acrylamide (500 mg/kg) was administered to rats intraperitoneally. Synaptosomes were prepared by the method of Dodd et al, and lysed by sonication. GAPDH activity and NSE concentration were measured. GAPDH inhibition measured in …

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 …

Photometric Processing And Interpretation Of Ratioed Imagery By Multivariate Discriminant Analysis For Separation Of Geological Types, Donald Marsh

Theses

A study has investigated the ability of ratioed information from Landsat 2 Multispectral imagery, to discriminate geological features through the application of photometric processing techniques. United States Geologic:.1 survey maps corresponding to the areas investigated have been used in correlation with ratioed imagery to identify predict and confirm geological features on the basis of resulting densitometric information. A multivariate, discriminant analysis of rock type, exposure data has enabled the fabrication of the final, optimized ratio image. The optimisation process used to predict geological types involved a priority structure that found the spectral bands with the highest discriminatory power and the …

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.

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 …

Emas, Elton Pride

Theses

The purpose of this thesis is to design a database for videotex from the view point of a Graphic Designer without ignoring technological aspects. I am dealing with a problem that has been overlooked and needs to be addressed the problem of database structure, search procedure, and retrieval of information for videotex. The goal is to design a database for videotex that will give the user ease of manipulation of information and better retrieval of that information with high interactivity and massive random access.

A Study Of Color Change With Respect To Dot Misregister In Dot-On-Dot Multicolor Halftone Printing, Christopher Vasko

Theses

Color variation with respect to dot misregister is a phenomenon that has long been observed in the color printing industry. In this paper the relationship between dot misregister and color change in dot-on-dot multicolor halftone printing has been investigated for the additive primaries red, green and blue. By measuring the color difference between in and out-of-register dots the direction of color shift and its magnitude can be determined along with the decrease in lightness of out-of-register samples. Misregistered red and green samples displayed a yellow color shift and misregistered blue samples displayed a purple color shift. The lightness of all …