Engineering Commons^™

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 …

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.

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 …

The Application Of The Finite Element Method To Plate Stress Analysis, Yao-Zong Jen

Theses

The finite element formulation of plane elasticity and plate bending is presented and is employed in the development of the formulation of element stiffness equations and structural stiffness equations. The basic relations used to derive the finite element equations for a solid continuum are also presented. The programming organization is summarized.

The computer program cited from TAYLOR has been used to solve the deep beam problem with triangular and rectangular elements and the SAP IV program has been used to solve the plate bending problems with quadrilateral elements. Problems solved are: (1) stress distribution at the midspan of a simply …

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 …

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 …

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, …

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 : …

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 …

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, …

The Dry Removal Process Of Sulphur Dioxide From Flue Gases Using Aluminum Oxide, Ching-Hwang Lu

Theses

Oxidation of sulfur dioxide to sulfur trioxide and absorption on aluminum oxide pellet as a mean of removing sulfur dioxide from flue gas was studied in a packed bed reactor at various temperatures, residence times, SO₂ inlet concentrations (ppm level), and particle sizes. Three different experiments were conducted: (i) sulfation with oxygen/ozone, (ii) sulfation with oxygen only in the presence of UV radiation ( 254 nm or 366 nm ), (iii) sulfation with oxygen only. In all the experiments substantial absorption of sulfur dioxide by alumina pellet was observed. Sulfation with oxygen/ozone give the highest absorption of SO_{2 …}

Behavior Of L-Shaped Reinforced Concrete Columns Under Combined Biaxial Bending And Compression, Amar Shah

Theses

Combined biaxial and axial compression for L-shaped reinforced concrete short columns is a common design Problem. Current code, provisions and the available design aids do not offer an insight into the determination of strength and ductility of biaxially loaded reinforced concrete column. An experimental and analytical investigation of the moment-deformation behavior of biaxially loaded L-shaped short columns were undertaken. Four 1/2 scaled specimens were tested till failure. Moment-curvature and load-deflection curves were developed from the experimental and the analytical results. The analytical results were obtained using a computer program developed by Hsu (1). From the investigation it is deduced that …

Behavior Of Tee-Shaped Reinforced Concrete Columns Subjected To Biaxial Bending And Axial Compression, Antoun Romanos Nader

Theses

The investigation deals with the effect of eccentric loading on the moment-curvature relationship of reinforced concrete tee columns.

The test program consisted of two series of tee-shaped reinforced concrete columns, loaded biaxially at constant angle from the principle axes. Their end conditions were assumed to be pinned-ended.

Loads, at constant rate, were gradually applied until failure. At each loading stage, measurements were made for the strains and deflections at the mid span section.

The experimental and theoretical results of the load- deformation and moment-curvature were compared and found that the analytical approach proposed by Hsu is applicable to irregular sections …

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 …

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 …

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 …

Behavior Of Joints Using Reinforced Polymer Concrete Under Seismic Loading, Ishac H. Kafrouni

Theses

This report describes the analysis and testing of two types of exterior beam-column joints conducted at New Jersey Institute of Technology. The testing program consisted of six beam column joints with varying strength cementing agents in the joint region: normal, high strength and polymer concrete. Half of the specimens contained 1.5 percent by volume of hooked end fibers. The study of the behavior of these beam column joints has indicated 2 cases of failures: a critical region in which the inelastic behavior was controlled by bending and, a critical region in which the inelastic behavior was controlled by high shear. …

Design Of A Photoreactor For The Oxidation Of Toxic Pollutants In Water By Ozone And Ultraviolet Radiation, Shahab Rashid Khan

Theses

A photoreactor has been designed to oxidize refractory chemicals found in water using ozone and ultraviolet radiation. The feasibility of the ozone/UV process has been examined by conducting experiments with three model compounds, namely, (1) o-chlorophenol (2) m-chlorophenol and (3) p-chloro phenol. For o-chlorophenol and p-chloro-phenol, reactions were very fast with ozone/UV oxidation and somewhat slower with m-chlorophenol. It is concluded that UV irradiation increases the decomposition of ozone and the resulting unstable intermediates are much more reactive than ozone. Ultraviolet light also helps in decomposing the substrate molecules. The effect of UV upon decomposition of ozone is more pronounced …

High Speed Puncture Impact Studies Of Structural Foam Plaques, Shashi B. Kumar

Theses

The constant velocity high speed impact study was conducted on different thermoplastic and thermoset structural foam plaques to study their impact behavior. Plaques of Noryl, Polycarbonate, Polystyrene and Polyurethane were carefully chosen to represent a true sample of the manufactured product. Test plaques were marked such that specimens could be tested for variation in location, thickness of the plaque and variation between plaques. High speed puncture impact experiment was conducted on each specimen and the results were analysed.

The test results showed that the impact performance varied significantly over the plaque. Noryl and Polycarbonate did not exhibit any correlation for …

An Interactive Procedure For Numerical Design Optimization, Jaehwan Lee

Theses

An interactive version of the numerical design optimization method of Pappas for the solution of nonlinear optimization problems is presented in this thesis, A designer intervention strategy is employed herein for interactive optimization to allow the designer to control and manage the optimization process. This procedure embodied in the interactive CADOP6 program is tested on the ten bench mark problems of Eason and Fenton to illustrate the designer intervented optimization process and to provide a comparison with the fully automated procedure of Pappas This designer intervented interactive program appears more effective and faster than the completely automated CADOP5 code on …

Spectral Analysis Of Brainstem Auditory Evoked Responses, Amir Hossein Massumkhani

Theses

In this study, the power spectrum density of the brainstem auditory evoked responses is estimated by the method of periodogram. Several techniques for reducing the leakage due to the finite length of data, smoothing the spectrum and reducing the ambiguity in the spectrum due to the resolution are studied. It is shown that a Hamming window reduces the leakage considerably and zero extention of the data to 512 points produces sufficient spectrum bandwidth. Three major peaks are observed at 100, 500, and 1000 Hz which are stable for different evoked responses. In one case with a delayed wave V, the …

Measurement Of Thermal Conductivity Of Polymers Using Line Source Method, Manojkumar C. Patel

Theses

The purpose of this investigation was to evaluate the Line Source technique to measure the thermal conductivity of different molten polymers. Although the results obtained using this method are within acceptable experimental error limits, due to tec reasons explained, the results are not as accurate as claimed in the literature which describe this technique.

Experimental Investigation Of An Axisymmetric Air Jet Impinging On A Flat Plate, Saibal Basu

Theses

Experimental investigation was carried out on a circular, submerged, axisymmetric turbulent air jet-with normal impingement on a smooth, flat, square lucite plate, The flow was considered to be incompressible because the velocity of the jet was not too high, with Mach Number of the order of 0.3. Three nozzle diameters of 0.375" (9,525 mm), 0.250" (6.35 mm) and 0.125" (3.175 mm) were used with Reynolds number ranging from 7,000 to 70,000.

Various flow parameters were measured to obtain the velocity and pressure distributions at the surface of the flat lucite plate and along the centerline of the normal impinging air …

Deposition Of Particles In Horozontal Parallel Plate Channel Due To Image Charge, Inertia, Viscosity And Gravity, Chi-Young Chu

Theses

This investigation was made to determine the effect on the deposition of particle in a horizontal parallel-plate channel due to the influences of image charge, viscosity, inertia and gravity. The flow considered was lamina, incompressible and steady. The flow patterns considered were uniform and fully developed with symmetry about the axis of the channel.

The governing equations derived for a particle were based on Newton's Second Law of motion. Since the resulting governing equations are linear second order differential equations, Runge-Kutta algorithm is used to solve the problem and graphical techniques is used to interpret the results of the numerical …

An Experimental Investigation Of Round Normal Impinging Jet Of Water, Dipendra Saharay

Theses

The various flow parameters of round jets of water impinging normally on a flat plate are measured experimentally. The velocity and pressure distribution along the axis of the jet at various sections of the jet parallel to the horizontal lucite striking plate and along the impinging surface was found. The nozzles used were 1/4 inch and 1/2 inch in diameter. The Reynolds number based on the nozzle diameter was 15,000 to 25,000. The distance from the jet origin to the deflecting boundary ranged from thrice the diameter of the jet to twelve and sixteen times the diameter of the jet. …

Preparation And Characterization Of Blocked Diisocyanate Monomers For Dental Applications, Stephen Richard Angeli

Theses

Six new monomers were prepared and characterized. The six monomers are blocked diisocyanate compounds. In the preparation 2,4-tolylene diisocyanate was first blocked with 2=hydroxyethyl methacrylate in the para NCO position. Six different blocking agents were then used to block the ortho NCO in the preparation of the monomers: (1) p-methoxyphenol, (2) m-methoxyphenol, (3) o-methoxyphenol, (4) p-chlorophenol, (5) m-chlorophenol, and (6) o-chlorophenol. The six monomers were characterized by mp, liquid chromatography, IR, NMR, and elemental analysis. All the characterizations show that the monomers are indeed the desired products.

The Quasisteady Approach For Thermal Analysis Of Frost Action Below Refrigerated Warehouses, Milan Kumar Bag

Theses

The quasisteady method of analysis has been used to determine the frost depth below refrigerated warehouses. For the case when the ground temperature is different from phase change temperature, the solution is obtained by numerical integration of the equation governing the phase change process. When the ground temperature approaches the phase change temperature closed form solution is obtained. The results obtained from the quasisteady method compare well with the experimental results. The results presented in this thesis should find use in the design of the refrigerated warehouses in the colder regions of the world.

Lifo Perishable Inventory (S,S,T) Model And Its Related Discount Policy, Yuan-Shyi Chiu

Theses

The objective of this thesis is to determine the optimal (s,S,T) ordering policy for a perishable inventory system with a fixed product lifetime and Poisson demand. The simulation technique is utilized to identify the optimal ordering policy which minimizes the total cost consisted of ordering, holding, shortage, and outdate costs. Upon the establishment of the optimal ordering policy, a discount policy on the outdating items is proposed to provide decision maker(s) with tradeoff between the profit and the average outdate cost.

The computer programs written in FORTRAN are designed to generate the optimal (s,S,T) ordering policy of any above-mentioned inventory …

Mathematical Model Of Temperature Profiles And Coking In A Crude Oil Heater Tube, Joseph C. Polimeni

Theses

A mathematical model to predict temperature profiles and coking of crude oil in furnace tubes is presented. The model assumes that the coking mechanism is due to a reaction in the laminar sublayer, whose rate depends upon the temperature profile. That profile is obtained by a numerical solution of the appropriate transport equations, with velocity profiles that may be laminar or turbulent, and including the temperature dependence of the crude oil properties. In addition, velocity and temperature profiles were adjusted when necessary to ensure closure of the heat and material balances. As a by-product of this study, a correction was …