Engineering Commons^™

Computational Method For Solving The Kinematics Of Mechanisms Using Matrix Methods, Rajat Pardal

Theses

This thesis deals with the computational methods for kinematics of mechanisms using matrix methods. The method is particularly suited to the complex mechanism problems for which hand calculations are difficult. The thesis first reviews the matrix methods on which the program IMP is based. A computer program developed by Ve Tung using the same theory is enhanced in this thesis. By using this revised program, comparison between the non-linear algebraic approach and the matrix methods developed in this thesis has been made by the help of suitable examples. Further, it has been proved that the Integrated Mechanisms Program does not …

Design Of Code Division Multiple Access Systems, Nakrendrakumar Patel

Theses

The intent of the work "Design of Code Division Multiple Access systems (CDMA) " is to consider different aspects of design with their effect on system performance. The generation of binary shift register sequences, that is maximal length sequences, with their properties are presented. From these maximal length sequences the Gold codes are obtained which are the most suitable approximately orthogonal codes for designing CDMA systems. These are discussed with their specific crosscorrelation properties. An extensive discussion is given of the difficult problem of synchronization, thatis bothacquisitionandtracking of pseudonoise sequences. Different synchronizing methods are discussed along with their relative performance. …

Saturated Hydraulic Conductivity Of Brunswick Soil With Aqueous Benzene Solution, Thomas R. Pisciotta

Theses

Tests measuring saturated hydraulic conductivity and dispersivity were conducted on Brunswick soil using an aqueous solution of benzene. The tests were performed using a flexible wall permeameter which was modified to allow extraction of effluent samples immediately upon exit of the test specimen. Influent and effluent samples were analyzed with a gas chromatograph in order to quantify dispersion and sorption in the specimen.

The test was performed using a confining pressure of 70 psi. and a hydraulic gradient of 100.3. Using a sample statically compacted to 99.2% of the Modified Proctor maximum density and tap water as a permeant, stable …

Identification Of Material Constants Of Human Bone Using Finite Element Method For Micropolar Elasticity, Sajid Mannan Sayed

Theses

Bone differs from most engineering materials in the composition of its structure. The classical theory of elasticity fails to correctly predict the stress concentration effects in bones with precracked or notched surfaces, and can be applied only to those materials which exhibit more homogeneity and isotropicity than bone. Therefore, generalized continuum theories, which have addditional degrees of freedom, must be used to determine the stress concentration effects in human bone, especially in regions of high strain gradient, such as a hole or an interface.

In this thesis, efforts have been made to identify the material constants of human bone since …

Computerized Work Measurement System, Vrajesh Shah

Theses

This thesis is concerned with the application of computerized work measurement to improve productivity and efficiency of production workers. In doing so, the techniques of MOST (Maynard Operation Sequence Technique) is studied to determine its appropriateness for industrial use. The advantages and disadvantages of the system are studied as to its value to large and small industries.

Development Of Dynamic Analysis Program Mini-Dymac, Shang-Rou Shien

Theses

The computer program DYMAC developed by B. Paul automatically generates and numerically integrates the equations of motion of closed loop multi-body mechanical systems. The theory behind this program is Larange's form of d'Alembert's principle. However, it is not an easy task for the beginners to understand this program completely. If there is a simplified version of the program, it will be of great help for those people to understand the essential organization of the program.

Using the same theory of DYMAC, computer program MINI-DYMAC is developed in this thesis and hoped to serve as an educational version of DYMAC. For …

Investigation Into The Feasibility Of Burning Hazardous Waste In Utility Boilers, Reuben Steinberg

Theses

Disposal of hazardous waste is of major concern in recent years in this country. Declining availability of landfills together with more stringent State and Federal regulations has necessitated the need to consider alternative means of hazardous waste disposal. It was suggested that burning hazardous wastes in presently operating utility boilers might be beneficial to the utilities and offer a solution to this social problem.

This thesis investigates the feasibility of this alternative given the technical, economic and regulatory considerations involved and discusses the findings of adopting this technology for hazardous waste disposal.

Based on the results of this study it …

Graphic Display Of Robot Kinematics, Ramamurthy Vishwanathan

Theses

This thesis uses the HOUIE.BYLI graphics software package to simulate the kinematics of a six degree of freedom, MAKER I robot. The coordinate frames for the various links of the robot were established. The kinematic equations for the manipulator were developed snd solved using the techniques of inverse geometric transformations and transformations of objects in 3D space. A program was also developed to calculate the joint variables of the manipulator given any point on, and the orientation of, an object. These variable values are used to direct the robot end effector to the given point. This can be seen in …

Similitude Analysis Of Model Experiments Of Piles Driven To Rock, George Nicou Georghoudes

Theses

This thesis investigates the similitude requirements for the Dynamic Pile Driving Apparatus in the New Jersey Institute of Technology Laboratory. The apparatus is being used to perform model tests to study bearing stratum fracturing caused by driving pile groups to weak rock.

Two approaches were used to establish similitude between the model and actual field conditions. The first approach utilizes dimensional analysis to develop a relationship between the energy delivered to the rock mass by the pile and the unit length. The second approach proposes a procedure to establish an empirical relationship between the threshold energy to fracture the rock …

On Natural Frequency Of The Stiffened Hvac Ducts, Jin-Lian Ha

Theses

This thesis employs ANSYS program to calculate the natural frequency of a stiffened HVAC duct and to investigate the affect of these stiffeners to the values of the natural frequency.

Investigation through this thesis shows that increases in the number of transverse stiffeners mould increase the natural frequency of the HVAC duct and the installation of the axial stiffener mould also increase the duct natural frequency.

The Impact Of Fms On Batch Production Processes, Jan-Sheau Ho

Theses

A Flexible Manufacturing System (FMS) is an integrated system of combining metalcutting and other processes with materials handling under computer control. With computer control, FMS is capable of processing a variety of different types of workpieces simultaneously. FMS is an approach towards a balancing of high output on the one hand and great flexibility on the other hand. FMS stands as a new technology to improve the productivity of mid-volume, mid-variety production; therefore the manufacturing world will soon feel the impact of FMS.

This thesis attempts to specify what FMS is and how it works, the influence of FMS on …

Electrochemical Reduction Of Quaternary Ammonium Salts, Rudolph K. Kapichak

Theses

The electrochemical reduction of two highly hindered quaternary ammonium salts was attempted. The reductions were performed in hexamethylphosphoramide at a controlled potential using platinum electrodes. It was anticipated that these reductions would provide a route to the formation of anti-Bredt bridgehead olefins. This work is an extension of the work of Dubois, Monvernay and Lacaze who electrochemically reduced quaternary ammonium salts such as trimethyl-t-butylammonium iodide (XX).

Trimethy1-2,4,4-trimethy1-2-pentylammonium iodide (XXIII) was reduced to form 2,4,4-trimethyl-l-pentene (XXVI) and 2,2,4-trimethylpentane (XXV). The yields of the two runs of this reduction were 10% and 20% and in the first run of the reduction 75% …

Optimization Of Reactive Ionized Cluster Beam (R-Icb) Technique For Deposition Of Gan Films, Veronica S. Kyriacou

Theses

The deposition of GaN film onto glass substrate, using the Reactive - Ionized Cluster Beam deposition technique was studied. The creation of clusters is dictated by various parameters such as the vacuum pressure inside and outside the crucible, the crucible temperature, and the nozzle diameter of the crucible. Optimization of these parameters was experimentally studied, and deposition of gallium films on glass substrates was tried as a first step.

The direct heating method was used at first to get the 1100¬1300°C crucible temperature which was required for the creation of gallium clusters. Although different tungsten wire diameters and different number …

The Gpib User's Manual For Hx-40, Ding-Tang Li

Theses

A completed RS-232 to GPIB interfacing system has been built for HX-40 to master the GPIB oriented machine through its serial port. GPIB commands and data can be transfered between HX-40 and the slave station, which is a HP 3582A spectrum analyzer in this project. The data acquisition from serial to GPIB is done by a well-made GPNET mode 10 interfacing board in a transmitting rate of 9600 baud rate. GPNET exchanges data and commands with HX-40 through a RS-232 port, and passes them to the slave station through a GPIB port which is coordinated by GPIB protocol. A software …

Optimum Design Of Structures Subject To Buckling Constraints, Thomas G. Looby

Theses

This thesis describes the optimal design of bar type planar truss structures subject to stress and buckling constraints. All of the structures considered are modeled using the direct stiffness finite element approach. A mathematical programming method incorporating a feasible directions routine is utilized to develop least weight designs for these conditions. The existing structural optimization programme CADOS which has successfully solved stress and deflection problems for this class of structures is adapted herein to treat local stability constraints based on Euler bucking criteria.In addition the optimization routine is modified to more effectively treat, infeasible starting designs. These modifications were tested …

Sputtered Mercury Cadmium Telluride Heterojunction Devices : Electrical Characteristics And Fabrication Process, Ashish N. Mistry

Theses

The main objective of this thesis was to grow high quality epitaxial films of the compound semiconductor Mercury-Cadmium-Telluride (MCT) on Silicon and MCT substrates,using sputtering technology. The research was aimed at investigating the heterojunction behaviour at such interfaces. Detailed studies about the heterojunction theory were made. Devices were made using MCT substrates prepared at the Santa Barbara Research Center (S.B.R. C.),California.

Experiments were designed to grow MCT films with high electron mobility and low carrier concentration in as-grown MCT films and some results were obtained close to reported data for high grade bulk material. Since the parameters involved in sputter …

The Interfacing Between The A/D Converter, Buffer Memory And Hx-40 Microcomputer, Yu-Hwa Chu

Theses

The data acquisition system which includes A/D converter, buffer memory, and address generator, is to digitize the signal for the computer use. The special feature of this system is the computer controlled digitizing rate over a range from 35K to 0.

The interfacing between Motorola 68000 E.C.B. to H.P. 64000 Development System is the simple example for data communication. How to make the protocal to be compatible is the main point. H.P. 64000 is treated as a host computer because it has the capability for data management and large memory for storing data.

Finite Element Analysis Of The Prosthetic Acetabular Region, Katkuri Venkat Rammanohar Reddy

Theses

Femoral component loosening and prosthetic stem fractures have renewed interest in conservative alternatives to conventional total hip replacements. The objective in this study is to get interfacial stresses of a acetabular surface replacement cup. This is done by performing finite element analysis of the model. A solid three - dimensional model with a grid of 3D isoparametric solid elements is generated using ANSYS, a powerful finite element analysis package. The stiffness is considered to be linearly proportional to the stress in the acetabular region. The stresses are determined by performing iterative finite element analysis. Stresses arp computed using two different …

Digital Signal Processing On Tms32010 Evaluation Module And Analog Interface Board, Jiming Sun

Theses

The TMS32010 Evaluation Module (EVM) and Analog Interface Board (AIB) have been used to implement a digital signal processing system. This new system will be the hardware basis for research and development in the DSP field at NJIT in the future. This thesis will serve as a user's guide and overall technical manual for the system.

TMS32010 Assembler, Linker and Simulator in VAX-11 are used to develop the system software, then we can down load the object codes to the EVM through the MODEM in order to test them. By using the A/D and D/A converter as input and output …

Microcomputer-Based System For The Measurement Of Facial Swelling, Michael Guy Demuth

Theses

The measurement of facial swelling after oral surgery can indicate the effect of anti-inflammatory drugs. A mechanical device was interfaced to a microcomputer to allow faster calculation of swelling. The mechanical system first established X and Y coordinates on the face. A feeler arm traced out the facial contours and two linear variable differential transformers (LVDTs) related X and Y displacements to voltages which were fed into a microcomputer via an A/D converter. Three BASIC programs were written which facilitated the analysis of patient swelling. MEASUREMENT stored the X-Y voltages from the LVDTs in a patient disk file. CALCULATION filtered …

Design And Construction Of An Atomic Nitrogen Source For Ion Cluster Beam Deposition Of Thin Film Nitrides, Sahar Elgharib

Theses

The objective of this thesis research was to generate atomic nitrogen to react with Ga being deposited by an Ion Cluster Beam method to prepare GaN thin films. An experimental reactor was designed and constructed to generate atomic nitrogen by making use of a microwave induced discharge to dissociate molecular nitrogen into atomic nitrogen. The concentration and the flow rate of the atomic nitrogen arriving at the substrate were measured by titration with nitrous oxide. The experiments were done with 0.32 square cm quartz tubing at room temperature over the nitrogen pressure range from 0.14 torr to 0.56 torr. Results …

Effects Of Adhesion On The Active Pressure Exerted On A Retaining Wall, Thomas G. Gallagher

Theses

This paper investigated the effect of adhesion on the active pressure behind a retaining wall. No equation existed to solve for the active pressure for a sloped backfill that also takes into consideration cohesive and adhesive forces on a failure wedge. The trial—wedge solution(Culmann method) considers these parameters, but since it is a trial and error method it takes up too much time to solve. A shorter solution is desirable. An equation for the active pressure in terms of ρ(angle between horizontal and failure plane) was derived. A closed form solution for earth pressure was developed by setting the derivative …

Dynamic Laryngeal Analysis : Hardware And Software, Augustine Chan

Theses

A data acquisition and analysis system has been built and tested for the study of laryngeal dynamics: The system uses a computer to control the digitizing rate and to coordinate the pitch prompting for the subject. Tokens of steady state laryngeal vibration are obtained from an electroglottograph when the subject intones a series of computer prompted pitches in a musically scalar sequence. The system digitize the data at a basic rate of 200 samples per laryngeal cycle: This procedure enables the system to perform a modal analysis of laryngeal function: The signal processing and analysis procedure developed displays voice registration …

Application Of Optical And Esr Measurements To The Solar Disinfection Of Drinking Water, Mary-Catherine Spyridion Cotis

Archived Theses and Dissertations

The idea of decontamination by exposure to sunlight is not, in any way, a novel one. It is a traditional pra­ctice for housewives to keep bed covers, for a short whi­le, in a sunny place, and to expose white clothes to di­rect sunrays, to make them look " whiter "

This idea was grasped by a team of Lebanese resear­chers, who applied this method to disinfect small amounts of drinking water. This very method is adopted, through the present work, to the Egyptian conditions. It is found that contaminated water is perfectly fit for human consumption after being exposed to …

A Study Of The Dynamic Control Of The Inverted Pendulum System, Koon T. Ang

Retrospective Theses and Dissertations

This report describes the simulation of an inverted pendulum control system. The purpose is to provide an interesting learning process through high resolution color graphics animations in the control of dynamic systems. The software uses the graphic capabilities extensively to make it very user-friendly and highly interactive. A numerical analysis method is used to solve the systems of equations. The animation driven by the results is then displayed on the video terminal. Facilities range from selection of controllers, changing of system parameters, plotting graphs, and hardcopy outputs.

A Microsequenced Prolog Inference Engine, Jeffrey J. Ferguson

Retrospective Theses and Dissertations

Prolog is a symbolic logic language presently emerging among numerous expert system designs. The architecture for a microsequenced Prolog machine (UPM) capable of providing the basic language features to a host computer is proposed. The Prolog machine functions are portioned into three processor components – Input/Output, Memory, and Central (CPU), where the design of the Central Processor is emphasized. Detailed discussion outlines the CPU facilities used to implement the forward-chaining and backtracking functions for the UPM. The UPM features are compared to the PLM-1, a microsequenced Prolog inference engine under development at University of California, Berkley. An emulation of the …

Utilization Of Expert Systems In The Work Place: Performing Project Software Cost Estimation On Training Systems, Henry A. Marshall

Retrospective Theses and Dissertations

This research report investigates the use of an expert system to aid project engineers at the Naval Training Systems Center in making decisions concerning the requirements of the computer systems used in simulators. For a prototype system domain, the author chose an expert system that would generate a software development cost estimate. This system questions the user about the features and options required on the training system. The expert system then analyzes the information to generate a “lines of code” estimate. A selected model will combine various factors to generate s value answer for the user. The capabilities and features …

An Experimental Study Of A Single-Phase Natural Convection In A Cylindrical, Vertical Channel, S. Ali A. Hashemi

Retrospective Theses and Dissertations

Presented in this paper is the first known experimental assessment of a single-phase natural convection in a cylindrical, vertical channel subjected to non-uniform or uniform heat flux. This work was conducted at the University of Central Florida in the College of Engineering.

The results of this experimental study were compared with theory. The experimental values of Nusselt numbers (Nu = hD/K) in the entrance and fully-developed regions were somewhat lower and higher, respectively, when compared with theory.

The Effect Of Thickness On Neuber's Rule For Estimation Of Fatigue Life, Shahram Elmi

Retrospective Theses and Dissertations

To predict the fatigue life of a notched member from a strain-life curve, the high strain concentration at the root of the notch must be known. For determining this high (post yield) strain, the Neuber’s Rule (for plane stress) and linear rule (for plane strain) can be applied. To investigate the accuracy of these method a notched member which is subjected to fully reversed cyclic loading is analyzed by the finite element method. Moreover, members with different thicknesses are analyzed with three dimensional elements, and a correlation between plane and three dimensional data is obtained. This correlation may be used …

Noise In Interferometric Sensors, Mark Phillips

Retrospective Theses and Dissertations

A noise analysis is conducted on an interferometric sensor employed in the study of underwater acoustic noise. Primary emphasis is placed on finding the output Signal to Noise Ratio of the sensor.

Once the initial problem of the type of noise is established, the analysis proceeds along fairly classical lines. Field equations establish the signal reaching the director. Linear filter analysis establishes the nature of the spectrum after passing through a lowpass filter. Finally, second moment theory is used to derive expressions for the output Signal to Noise Ratio.

It is noted that the random ocean noise introduced to the …