Digital Commons Network^™

Ray And Beam Representation Of The Glancing Phenomena, Michael Sotiriou Vogas

Theses

Asymptotic ray theory (ART) is a widely used method dealing with problems of wave propagation in an inhomogeneous medium. The main deficiency of ART is in transition regions where rays near caustics, glancing and critical incidence fail to represent the actual wave field. Ray bundles in such transition regions have been successfully replaced with modal bundles and remainders El] in well defined profiles. However , in practical problems it is difficult to implement modal representations and almost impossible to express remainders. Recently emerging Gaussian beam method (GBM) has shown promising results in representing the total field produced by a source …

Plate Stress Analysis By The Finite Element Method, Wen-Jung Chuang

Theses

The finite element formulation of plate elasticity is presented and is employed in the development of the formulation of element stiffness equations. The programming structures are also summarized.

The finite element program PLATE cited from Prof. J. N. Reddy's " An Introduction to the Finite Element Method " has been used to solve the plate bending problems with quadrilateral elements. The problems solved are:

(1) deflections and stresses in a circular plate with all edges simply supported under uniform load.

(2) deflections and stresses in a circular plate with all edges clamped under uniform load.

each case including four different …

An Analysis Of Different Desalination Processes, Vahe Garabed Hovsepian

Theses

The object of this thesis is to study the various modes of desalination and analyze the energy and economic requirements. The desalination methods discussed are, single stage desalination, Long tube vertical Evaporator, Multistage Flash distillation, Solar Energy method, Freezing method, Reverse osmosis & Electrodialysis.

It was found that for vapor reheat process at 350°F input 639 ft-lbs/lb product required 2.01 kw-hr/100gal. product and the total cost 51.6c/1000gal.

Not one process is best for everyone. In countries close to the equator, the solar energy method is the best. Most other countries depend on flash distillation process, etc. So we can't draw …

College Relations : A Total Recruiting Strategy, Donald Roderick Hunt

Theses

Problem Statement

The MMH Corporation has a very experienced but older engineering population. It is management's desire to replace the engineering population as its members retire by two methods:

1. The recruitment of experienced engineers with key skills for various critical positions.

2. The development of an aggressive and effective College Relations Program targeted at key universities to attract a steady stream of new talent into the engineering populations.

Research Objectives

A. To determine what areas of a volatile marketplace MMH intends to compete in.

B. To determine what attracts the best new college graduates to a certain company as …

In Vitro Comparative Hydrodynamic Study Of Heart Valve Bioprostheses Under Accelerated Fatigue Conditions And Under Physiological Conditions, Mario Cincinat Iosif

Theses

The present study involves the use of an accelerated fatigue testing system*, and a pulse duplicator (heart simulator)*, to evaluate the hydrodynamic characteristics of cardiac bioprostheses.

The hydrodynamic performance of these prosthetic valves is compared when tested using each machine, in order to assess the determining conditions that exist for each case, and try to correlate them.

Pressure drop and pulsatile flow across valves are measured, using a real-time on-line data acquisition system, which includes, in addition to the fatigue tester and the pulse duplicator, a DC amplifier, an analog-to-digital converter and a digital microcomputer. Special acquisition software has been …

Study Of The Effects Of Pumping Pressure On The Properties Of Fresh Concrete, Dinesh Vithal Kenkre

Theses

This thesis has a two-fold objective. One, to develop a suitable testing apparatus in the labaratory to simulate the effect of field pumping of concrete and two, to conduct some preliminary tests to investigate the feasibility of the testing apparatus.

Pumping of concrete has been practiced in the U.S.A. since 1930. The behaviour of concrete in a pipeline has not been studied in much detail while development in the pumping technology raced ahead of the research in this field. Previous studies done in this field have clearly indicated the need for a laboratory simulation of pumping process in order that …

Laminar Flow In A Porous Pipe With One Plugged End, Pyne-Hwa Ku

Theses

A steady laminar flow through a co-cylinder porous pipe with one plugged end was investigated theoretically to obtain velocity, pressure and shear stress distributions.

An integral momentum equation and the Darcy's law for flow through the porous wall were solved numerically by the Runge-kutta method.

As the fluid is injected from the outer wall into the porous tube, the fluid in the inner tube is accelerated from rest at the plugged end to a fully-developed velocity profile at the exit of the porous tube. It was found that the coefficient of the wall shear stress and the dimensionless pressure drop …

An 8052 Ah - Basic, Based Development System, Suresh Vishwanath Leley

Theses

This project exploits the latest in microcontrollers-an entire environment for developing and prototyping a microcontroller application. With one key chip, a little glue, and a Dumb terminal a powerful system is achieved at a vanishingly small cost. This "one chip" system is adequate for realizing a wide range of applications calling for a small computer or an embedded processor.

Besides economy of system cost, the turn around time from concept to functioning application can be extremely short, even when the development engineer is not particularly well acquainted with traditional assembly language and microprocessor development practices. This economy is achieved by …

Linearization Accuracy In Probabilistic Load Flow, Guan-Zhong Liang

Theses

This paper presents a linear load flow method which can be used for probabilistic load flow analysis. The method is based on least-square estimation. To estimate its accuracy in linear load flow calculations, the method and a previously developed linear load flow method are applied to a typical power system and the results evaluated. Comparable accuracy is noted.

The Cocoa Rehabilitation Project In Ghana, Kwane Boakye Dankwah

Theses

Several studies have been done in an attempt to find out the cost involved in establishing an acre of cocoa farm and most of these used the questionnare method to gather the information. However, most data gathered this way did not include detail establishment cost information on inputs as the farmers relied on recollection of cost they incurred.

The study done by C. Okali at Dominasi in the Brong Ahafo Region did not follow this pattern. Data collection for this study was started in May 1971 and ended in September 1972 and there were 45 farms involved. This sample was …

Modal Analysis Of A Cantilever Plate, Ohseop Song

Theses

This thesis discusses the vibration of a thin, flat cantilever aluminum plate. Results are based on both an analytical finite element method using the ANSYS program and an experimental analysis using a digital Fast Fourier Transform (FFT) analyzer. The FFT analyzer permits extraction of modal parameters (natural frequency, damping, mode shape) for the plate.

Black Working Women And Equal Employment Legislation, Barbara Donese Mitchell

Theses

The research for this thesis is undertaken in order to examine whether or not equal employment legislation improved opportunities in the workplace for Black working women. The following areas will be focused on:

- Legislation - Civil Rights Act of 1964, Equal Employment/Affirmative Action, Equal Pay Act, and Title IX.

- Racism/Sexual Harassment

- The Public and Private Job Sector

- Unions

- Academia/Education

- Politics

Some sources for examination will include studies by researchers from various universities on Black women and employment, statistics from the U.S. Labor Bureau, National Research Council and Joint Center for Political Studies, and reports …

Fracture Energy And Tensile Behavior Of Concrete, Wen-Jinn Chiou

Theses

Fracture behavior of concrete has been a subject of investigation for the past two decades. The need of understanding the complete tensile response of concrete is absolutely essential for theoretical modelling as well as design application of plain concrete structures.

In this study, attempts were made to investigate the validity of two important fracture parameters, namely, the fracture energy and the critical crack tip opening displacement. Three types of test specimen, dog- bone shaped tension specimen, notched beam and compact tension specimen, were investigated. These tests were conducted using the closed-loop MTS 810 strain-controlled testing system. For the uniaxial tension …

Reliability Studies On Solid Tantalum Electrolytic Capacitors By Means Of Accelerated Life Tests, Venkata R. Golthi

Theses

The purpose of this thesis is to understand the failure mechanisms in Solid Tantalum Capacitors encapsulated in plastic, and to suggest the precautionary measures that prevent the occurrence of these failures.

The reliability of Solid Tantalum Capacitors encapsulated in plastic is of considerable interest because in some applications where the mechanical accelerations or shocks are considerable the "better" "hermitically" sealed type are not able to sustain themselves. Poor adherence between the dielectric film and the base metal Tantalum under the conditions of sudden mechanical shocks, causes problems.

Our study was carried out in two different directions, theoretical and experimental. The …

Utilization Of The Microcomputer To Improve The Productivity Of Small Manufacturing Companies, Hung-Gi Chang

Theses

The ongoing microcomputer development has led to its increasing application in manufacturing to reduce costs and improve productivity. Being more aware of this technology, most of these benefits have accrued to large firms. The intent of this thesis is to show that it is equally advantageous for small manufacturing companies to utilize them and show how they can do so.

The paper discusses the role and characteristics of microcomputers. Available software to do engineering designs, materials requirements planning, process planning, and master production scheduling is described. Using a case study a method that can be followed in selection and implementation …

Pozzolanic Admixtures In Concrete Mix, Ronghao Chen

Theses

Fly ash and condensed silica fume are two main mineral pozzolanic admixtures in portland cement concrete. The increasing use of the fly ash in concrete projects and concrete products during the past 3O years and condensed silica fume in several projects during the past 1O years indicates a greater acceptance of them as the mineral pozzolanic admixtures in concrete. Although the engineers are of some identical views in using these industrial byproducts in concrete projects, there are different views on how the behavior and utilization of fly ash con-crete and condensed silica fume concrete since the byproducts are not the …

Characterization Of Microorganisims After Feeding With Phenolic Compounds : Comparing A Domestic Sludge To An Industrial Sludge, Dianne Adamowitz

Theses

This study examined the effects of phenolic compounds on the populations in mixed liquors obtained from two very different treatment plants: the Passaic Valley Sewerage Commissioners plant in Newark, and the Livingston, NJ municipal treatment plant. The dominant organisms were identified initially and after ten days exposure to phenol (100 ppm), and either 2-chlorophenol (20 ppm) or 2,6-dichlorophenol (10 ppm) in aerated batch reactors.

Results confirmed the remarkable similarity between the two mixed liquor populations, in spite of the significant differences in the operation of the two treatment plants.

Osmotic And Mean Activity Coefficients Of Cacl2, Nai, Libr And Licl In Ethanol At 50 Degrees C, Gregory J. Czerwienski

Theses

Vapor pressure depression data for CaCl₂, NaI, LiBr, and LiCl were measured at a molality ranging between 0.2-7.5 depending on the solubility of the salt in ethanol. Data were also measured at 35° C for the LiCl. The apparatus used was a recirculation still of the Othmer type.

Osmotic coefficients were calculated from the total pressure of the system. The one parameter Bromley equation and the three parameter Pitzer equation were used to correlate the data. For all the systems, the Pitzer equation correlated the data better as one would expect. Mean activity coefficients were calculated graphically and …

The Conversion Of The Process Flowsheet Simulator, Flowtran, For Fortran 66 Based Mainframe Computers, Timothy Edward Roche

Theses

The process flowsheet simulator FLOWTRAN was converted from FORTRAN 77 code to FORTRAN 66 code. The conversion was accomplished by developing a number of subprograms to handle FORTRAN 77 intrinsic functions that are missing in the FORTRAN 66 standard and by altering the code to take advantage of the developed subprograms. Also developed were a set of procedure files for executing the FORTRAN 66 FLOWTRAN on a Sperry-Univac 90/80-4. The new FLOWTRAN was tested and performs identically to the FORTRAN 77 version. The FORTRAN 66 FLOWTRAN can be installed on any mainframe computer with a FORTRAN 66 compiler.

Isoparametric Finite Elements For Axisymmetric Solids, Ramanand R. Shetty

Theses

The finite element formulation of axisymmetric plane stress analysis is used to develop a computer program for numerical implementation. The basic relations used to derive the finite element equations for a solid continum are reviewed in the thesis. The programming organization is summarized and program list is given in Appendix.

The program portion for isoparametric elements are borrowed from Numerical Methods in Finite Element Analysis by K. J. Bathe and E. L. Wilson, and various other subroutines are used from Mr. Huang's thesis on Micropolar elasticity analysis. Mr. Huang's computer program is based on the work done by Dr. Nakamura …

A Study Of Hazardous Wastes Generated In New Jersey With Regard To The Siting Of Waste Disposal Facilities In The State, Shreerang Narayan Dharasker

Theses

The effective treatment and disposal of hazardous wastes is one of the most urgent problems facing the State of New Jersey today. New Jersey is the most densely populated state and is a leader in industry. Nearly every major industry in the nation is represented by one or many production units all of which generate copious amounts of hazardous and toxic wastes each year. Although the state has the toughest rules and regulations on the management of hazardous waste, there are very few options exercised or facilities cited for the effective treatment and disposal of wastes within the state boundaries. …

Dispersion In The Laminar Flow Of Ellis Model Fluids Through Straight Tubes, Yeong-Hua Huang

Theses

Taylor-Aris dispersion theory is extended to the laminar tube flow of Carreau model fluids and Ellis model fluids and the results are compared with those of power law fluids. It is found that Carreau and Ellis models are more appropriate than power-law model, especially at low pressure gradient.

An exact solution to the unsteady convective diffusion equation in fully developed laminar flow in tube is obtained by applying the generalized dispersion theory of Gill and Sankarasubramanian for Ellis model. The results are compared with those obtained by Booras and Krantz for power-law model. The most interesting result of this work …

An Analysis Of Variation In Response Time Of Cpu Scheduling Algorithms As A Function Of Load: A Simulation, John Dehority

Theses

This thesis analyzes a group of cpu scheduling algorithms on the basis of the variation in response time that results from changes in the system load. The results of this study quantify the differential degradation of performance across job categories. The job categories include short-burst interactive jobs as well as cpu intensive jobs. For each job type, measurements were made of average job turn-around time, weighted average turn-around time, and worst case response time. Additional statistics gathered include: ready-to-run queue size, cpu utilization and throughput. The three cpu scheduling algorithms compared are round-robin, shortest-job-first, and a multi-queue priority scheduler. The …

Analysis Of Compliant Pins Subjected To Plastic Deformation, Lincoln Miller

Theses

An experimental/numerical analysis of two types of compliant pins is presented: dynamic retention pins and cantilever pins. It is shown that there is a trade-off between the performances of both types of pins. For the same range of retention force, the cantilever pin, with a smaller stiffness, is more forgiving and gives a broader range of deflection. The dynamic retention pin is shown to be more reliable with time and replacement frequency, since it exhibits less plastic deformation for the same range of retention force.

Leading The Electronics Industry Into Total Automation, George P. Rossi

Theses

The introduction of an automated PCB facility in today's technological society still includes a people-oriented facility. The main thrust should be to develop Artificial Intelligence, then the incorporation of LANS, CAD, ICAM, and CIM.

The ability to lace all the functions together is by far the biggest obstacle. The hardware of the equipment is not so much the obstacle to the chemical process and knowledge as the software. Software, which is the capability to talk from the computer to the equipment, is the greatest stumbling block because there is no standardization in the language format.

The method which a computer …

Does Teaching First Grade Students About Their Personal Learning Styles Improve Their Self-Concepts?, Jacquelyn Achurch

Theses

Research on learning style based instruction has indicated its importance as a valuable tool for academic success, and improved self- concept has been viewed as a by- product of this success . Additional research has labelled self-concept as a noncognitive correlate of learning style . The relationship between knowledge of one's personal learning style and self-concept has needed to be explored. Yet, very few studies about the effect on self-concept, after being taught about ones learning style, have been conducted . Hemispheric dominance and modality preferences are formed at an early age with self- concept also being fairly well-shaped before …

American Studies: Civil War, The Correlation Of Literature And History Studies In High School, Arlene Kellogg

Theses

Courses in history can be nothing but memorizing facts, and courses in literature can be writing without roots . The author proposes a correlated curriculum for high school American literature and history, specifically in the Civil War time frame to change this situation.

The purpose of this curriculum, "American Studies: Civil War," is to make the history of our country live for the student, giving him/her a feeling for the mood of the times and motivating him/her to become politically active as a young citizen.

To validate the proposal, the author has interviewed experts in the fields of literature, history …

Against The Wall, Arthur Hynes

Theses

None provided.

Recognizing Promises, Advice, Threats And Warnings In Natural Language Discourse, Kevin Donaghy

Theses

Not Included

Annotations, James Conlin

Theses

Not Included