Digital Commons Network^™

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 …

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 …

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 …

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 …

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 …

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 …

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 …

A Presentation Of The Self-Organizing Paradigm; Speculation On Its Impact On Health, Gail Dahl Schomaker

Theses

This thesis explores the emergence of a new paradigm in understanding health, grounded in the scientific principles of self-organization and systems theory. Gail Dahl Schomaker presents a comprehensive examination of the shift from the traditional Newtonian mechanical worldview to the dynamic, process-oriented perspective rooted in the theory of dissipative structures as formulated by Ilya Prigogine. Central to this new worldview is the conceptualization of living organisms, including humans, as open systems that maintain and increase order through continual interaction with their environment.

The paper is structured to introduce key theoretical models from systems theory, cybernetics, and holistic health, progressively building …

Tradition And Transformation In Arab Education: The Challenge For Saudi Arabia, Maha Muhammad Lufti Adeeb Al-Najami

Theses

This thesis focuses on the developments in education in the Arab world .. It begins with a broad historical survey of traditional education in the Middle East. Traditional educational institutions are viewed in the context of the Islamic religious heritage and the various Islamic dynasties which developed throughout the Middle East. Then, the consequences of the Western influence on Arab education are explored. A brief history of Western colonial interests in the Middle East is given focusing on the effects of these colonial interests on the traditional educational programs. The Western impact began the process of modernization in the Arab …

Discrimination In The Assessment Process: The Role Of Professional Appraisal, Christopher G. Sansone

Theses

The thesis Discrimination in the Assessment Process: The Role of Professional Appraisal by Christopher G. Sansone explores the complexities of property tax assessment and how disparities in appraisal practices contribute to inequities. It argues that many citizens lack an understanding of property taxation, making them vulnerable to unfair assessments. The study examines the historical evolution of property taxation, including taxpayer revolts that have shaped modern assessment policies. It highlights issues such as assessment discrimination against lower-income property owners, political influences on the appraisal process, and the impact of legislative and judicial decisions.

A key argument is that professional real estate …

A Method Of Storage And Display Of Chinese Characters As Graphic Symbols, Lo-Yi Chung

Theses

Not provided.

An Investigation Of Flexographic Duotone Reproduction With Variations In Press Pressure Settings, Hirohiko Itoh

Theses

Improved print quality has been become an important issue for the flexographic printing method. This is especially true in the area of fine quality halftone reproduction. The nature of this printing method which uses elastic materials for its printing plate is difficult to control. The main issue is the control of the pressure between the plate and the substrate. Extensive research has been done to change the hardness and the structure of the plate, however, the pressure used to transfer ink still remains a critical factor in achieving good halftone quality. Although the critical pressure control of the impression from …

An Extended Relational Data Base Management System For Engineering Design, Charles Fung

Theses

At present, the use of the relational model in the engineering design support domain is restricted due to the following: lack of ability to handle complex objects, no support for Abstract Data Types, inappropriate concurrency control for long transactions, no support for versioning and update propagation, poor efficiency, and insufficient design rule checking and consistency contraints enforcement. A simple relational database management system is designed and implemented under the UNIX operating system to incorporate two major extensions: support of user-defined Abstract Data Types and operators, and built-in Design Data Versioning. The design, implementation, and possible extensions to these new facilities …

Investigations Of A Plasma Rotating In A Magnetic Field, Janet E. Andre

Theses

A magnetically rotating electric arc of coaxial design was produced in argon with and without zinc at 1 atm. The arc was characterized in terms of temperature by varying the source conditions. The axial temperatures decreased with distance from the cathode tip and the distribution was mathematically described by T = m * log (x) + b. The radial temperature distribution between the cathode and anode was determined by spectral analysis. The most homogeneous conditions with an argon/zinc plasma varied by approximately 4 % and could be applied in spectrochemical analysis. A steady state condition in terms of the frequency …

An Investigation Into The Limits Of Registration Error In Tri-Color Continuous Tone Images, Carolyn Braley

Theses

A study has been completed which quantifies the amount of misregistration allowable on a continuous tone multi-color image. By the use of color separation filters and a misregistration device, the actual threshold limits of registration have been derived for each individual color. The correlation between the subjective, visual impression, and the actual numerical quantity have been examined. As a result the specific threshold limits have been determined and can be used for any continuous tone imaging application.

Vector Quantization Of True-Color Images, Stephen H. Kristy

Theses

Vector quantization (VQ) has recently emerged as a powerful and efficient technique for digital speech and image coding. The goal of such a process is data compression: to minimize communication channel capacity or digital storage memory requirements while maintaining an acceptable fidelity level of the data. A review of various VQ algorithms and their respective design considerations as applied to color images is given. Fidelity measurements and signal-to-noise ratio calculations are discussed. A modified mean-residual vector quantizer using the LBG design algorithm with color signal preprocessing is described. The algorithm is developed to yield a bit rate of 0.709 bits …

An Implementation Of The Chor-Rivest Knapsack Type Public Key Cryptosystem, Robert Jr T. Salamone

Theses

The Chor-Rivest cryptosystem is a public key cryptosystem first proposed by MIT cryptographers Ben Zion Chor and Ronald Rivest [Chor84]. More recently Chor has imple mented the cryptosystem as part of his doctoral thesis [Chor85]. Derived from the knapsack problem, this cryptosystem differs from earlier knapsack public key systems in that computa tions to create the knapsack are done over finite algebraic fields. An interesting result of Bose and Chowla supplies a method of constructing higher densities than previously attain able [Bose62]. Not only does an increased information rate arise, but the new system so far is immune to the …

Film Granularity And The Effect On Subjective Image Quality, James A. Wisner

Theses

The evaluation of subjective image quality in pictures is investigated as a function of the scene content of the images and the grain level of the images . In the pictures studied, no relationship was observed for the effect of scene content when the only other variable was the grain level.

Teachers As Advisers In Missouri Middle Schools, Barbara J. Roach

Theses

This study investigated the use of advisement programs in Missouri middle schools. A questionnaire was mailed to principals of 102 middle schools in Missouri. Of the 73 responses, 19 were from schools with an advisement program, five from schools which once had an advisement program, but no longer did, and 49 from schools which never had an advisement program.

There were five purposes of the study: (1) to determine how many middle schools in Missouri utilized an advisement program; (2) to identify the nature of those schools using the factors of number of students, grades in the school, number of …

Amiss: A Microprogramming Simulation System For Educational Use, Robert Pesar

Theses

Not Included

Computer Enhancement Of Real World Photographic Images Using Homomorphic And Linear Filtering, Nitin Sampat

Theses

Digital Image Processing techniques have become increasingly popular in the last few years. Conventional silver halide photography continues to be used by the large amateur market, but not without "imperfect" images. There is almost always a need for enhancement or subsequent improvement after the photograph is made. This study dealt with computer image enhancement of such "imperfect" photographs using homomorphic (non-linear) and linear frequency-domain digital filtering (on a VAX-11/785) and a comparison in effectiveness was determined, using a subjective criteria for image quality. It was found that, in general, linear filtering is to be the preferred method of choice when …

A Study Of Mutispectral Temporal Scene Normalization Using Pseudo-Invariant Features, Applied To Landsat Tm Imagery, William Volchok

Theses

A new technique for performing temporal image normalization using pseudo-invariant features was investigated. The technique was applied to the six reflected spectral band images of the Landsat TM sensors. The temporal normalization of pseudo-invariant features yielded linear normalizing functions for all bands. The errors in the normalization of pseudo-invariant features was determined to be on the order of three digital counts, which was estimated to be equivalent to reflectance errors on the order of one percent reflectance. Temporal normalization of all features in the Landsat scene shows great potential for both quantitative and qualitative temporal change detection.

A Survey Of The Literature On Moisture In Building Construction, Lawrence Charles Tiboldo

Theses

The aim of this thesis was to evaluate the literature on moisture in buildings for its usefulness in the understanding of the theory involved in moisture transfer in buildings. Because analysis of the effects of moisture migration and development of condensation control strategies in structures depends on the knowledge of heat and moisture transfer theory as well as on the documented data on building material properties, evaluation of the usefulness of the reference material will serve as an indication of the availability of pertinent information.

To fulfill this objective, the literature listed as references to Chapter 21 of the 1985 …

Robot Manipulators And Control, Theresa Wu

Theses

This paper on Robot Manipulators brings together theories from three fields : computer graphics, kinematic equations and microprocessor based control.

There are four chapters in this paper, chapter one is the conceptual development on homogeneous transformations, express the position and orientation of the transposition of an object in Cartisian coordinates. Chapter two develops the method of obtaining the Cartisian coordinate position and orientation of the end effector for a manipulator, give the joint coordinate as input and use the homogeneous transformation to express the position and orientation. Chapter 3 is a very difficult one; it solves the parameters for the …

Spectrum Analysis And Real-Time Analysis Of Electroencephalograms, Suzanne Hesook Won

Theses

The analysis of the EEG background waveform is studied by two techniques, spectrum analysis and real-time analysis. The spectrum analysis is performed by using Fast Fourier Transformation (FFT) on a segment of the signal. The resulting signal is classified into different band types such as delta, theta, alpha and beta, to see the power in each band, and the magnitude of the power on the left and right side if the brain is evaluated for asymmetry. The mean power frequency shows the frequency where the maxinum power exists in each band type. This type of analysis provides overall information of …

An Investigation Of The Application Of Utility Theory To Determine The Value Of Time: The Demand For Interactive Information Systems In Student Markets, Gordon S. Kalley

Theses

The economic rational of many contemporary businesses is the provision of services or labor saving equipment which their customers' pay for in order• to save themselves time. A major decision such an enterprise must make prior to entry into the market i=_ whether enough of a market exists to make its entry worthwhile. Such firms would be able to make better resource allocation decisions if they could have a quantitative measure of the relationship of their consumer's valuation of time vis a vi money. This study proposes such a measure.

Interactive information systems, whose viability depends to a large degree …

Basic Concepts In Cad & Cam, Chao-Ming Liu

Theses

As the computer revolution is nearing its end, CAD/CAM concepts are being widely accepted and evolving rapidly. This thesis begins with a disscussion of the significance and advantages of CAD/CAM and their relationship with automation. Hardware and software components involved are then introduced. Product design under CAD is done by computers. Computers perform engineering analysis, necessary calculations, and dynamic simulation to complete the complex design. The geometric elements and operational primitives are provided by a data base system. The major components of CAM are then introduced. The term CAM is used in a broader sense to include CAPP, MRP, NC, …

Conjugate Operators And Operator Spaces, Ronald Stephen Palko

Theses

Everyone is familiar with the imaginary unit. Its square is minus one and it has a conjugate equal to the negative of itself. The imaginary unit is a conjugate operator. One can also simply define an operator whose square is plus one, with a distinct conjugate operation again returning the negative of itself. Thus one obtains a second conjugate operator. If the product of these two operators is taken, a third conjugate operator with distinct properties is obtained. These three conjugate operators together with the real number 1 form a "conjugate basis" for the spaces that will be developed here. …