Digital Commons Network^™

Assembly Cell Design For The Canister Control Valve, Alfred A. Gates

Theses

This thesis involved the design and testing of a robotic assembly cell for a canister control valve. The valve regulates the air flow to a carburetor of an automobile and is presently hand assembled at Rochester Products Division of General Motors. It consists of a body, a spring, a diaphragm and a cap. Each part required special handling by the robot.

A simulated canister control valve assembly cell has been built in a laboratory using an Adept One robot. This report covers the design process of the cell along with the test of the cell. The report also includes pertinent …

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.

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.

Determination Of Trace Quantities Of Selenium And Arsenic In Canned Tuna Fish Using Electroanalytical Techniques, Ann Marie Higham

Theses

Toxic metals are present in the environment and are known to be present in food. Selenium, which is considered an essential micronutrient, is recognized as a toxic metal at slightly higher concentrations. Arsenic is also recognized as a toxic metal. Selenium and Arsenic tend to accumulate in food, specifically fish and seafood.

Fifteen brands and types of tuna fish were analyzed for selenium using differential pulse cathodic stripping voltammetry. The cans with the high and low concentrations of selenium were analyzed for arsenic using differential pulse polarography. Three samples with three percent recoveries and a blank were analyzed for each …

Network Performance Monitors, Daniel Sorrentino

Theses

Over the last 10 years both industry and academia have conducted extensive research and development in the areas of local area network management and performance. This thesis investigates some different ways of measuring the performance of local area networks and studies hardware and software systems designed to watch over network performance and events. These systems are termed "network performance monitors." As part of the thesis, a network performance monitor has been implemented to monitor TOOLSNET, an Ethernet based local area network, supervised by the Engineering Tools Technology group at Compugraphic Corporation. This network performance monitor is called TOOLSNET ANALYSIS PACKAGE, …

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 …

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 …

Reliability Evaluation Of Liquid Crystal Displays Under Accelerated Test Conditions, Ravi Sankar Kalyandrug

Theses

This study has determined the effects of high temperature and humidity on the reliability of liquid crystal dis-plays.

Reliability life testing was done on variety of LCD samples under different operating conditions. All the besting was done under accelerated conditions, including high temperature of 85°C and relative humidity of 70%. A number of failure modes were identified in the long series'of tests.

Among many failure modes such as peeling of seal, degradation of polarizers etc., the most important is the degradation of alignment of liquid crystal molecules. Leakage current measurements were made on all the LCD samples before and after …

Model Experiment Of Rock Fracturing Caused By Driving Piles, Dai-Heyng Lee

Theses

The geotechical construction problem of rock fracturing caused by pile driving is investigated using a laboratory model. One inch diameter closed bottom steel pipes were driven into a simulated rock mass consisting of masonry bricks having an average compressive strength 3,200 psi. Both single pile and five pile model groups were tested. The single pile tests indicated that a threshold of penetration behavior occurred at a theorical hammer energy of 100 ft-lb and this was used for the group tests. Penetration rates were measured using an optical level.

Piles in the five pile model group were initially driven to a …

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, …

The Flexible Manufacturing System And Its Development In Taiwan, Chi-Shuan Liu

Theses

FMS is a new kind of manufacturing system which is flexible enough to handle a limited variety of parts. It usually consists of three main components: machine tools, a material handling system, and a computer control system. The material handling system is the key to integrating manufacturing cells into the FMS. The machine tools used in FMS are programmable and computer-controlled, having the ability to change their operation process rapidly to deal with product changeovers and part design changes. The digital computer used in FMS has the capability of handling various manufacturing processes which are not capable of being controlled …

Laminar Flow Through A Porous Annulus With Surface Suction, Stelios C. Nicolaides

Theses

A theoretical investigation was conducted to obtain the velocity, pressure and shear stress distributions for incompressible, steady, fully developed, laminar flow through an annulus, with a uniformly porous inside tube wall. Suction at the walls is a result of the pressure difference across the porous wall.

The continuity equation, momentum equation and the Darcy's law for suction velocity are analysed with an integral method. The resulting differential equations were solved using a numerical technique.

For the same radii ratio, dimensionless inlet pressures on both sides of the porous wall and dimensionless porous resistance, the dimensionless length required to reach zero …

Frequency Characterization Of A Thin Linear Antenna Using Diakoptic Theory, Howard Harold Smith

Theses

A frequency dependent analytical expression for the input impedance of a thin wire antenna is obtained using diakoptic theory. In diakoptic theory the linear antenna is seperated into electrically short segments where each segment is treated as a two-port network. This approach eliminates the need for an integral equation formulation. An impedance matrix is found which characterizes coupling between all segments. By expanding the free space Green's function in a power series in wavenumber k each entry in the resultant impedance matrix is obtained as a function of frequency. Enforcement of the continuity of currents and equality of scalar potentials …

Present Reliability Of Liquid Crystal Display Devices, C. N. Suresh

Theses

The purpose of this Thesis is to study the life of liquid crystal display devices as at present available in the market place. To accomplish this, accelerated tempera-ture conditions at 77°C and 85°C were used.

During the last few years, there has grown a tremendous interest in wide range temperature operating and fast LCDs. It is therefore important to understand how LCDs behave under these conditions.

The reliability of a liquid crystal display is usually measured in terms of a quantative degradation in electrical performance and a degradation in visual appearance. The degradation in visual appear6knce may manifest itself as …

Analysis Of Bolted Rock By Computer Modeling, Niann-Chyun Wang

Theses

A computer model-based on VAX-ANSYS system was developed to model the behavior of multi-layer rock systems reinforced by pretensioned rock bolts. Three models were utilized for this study. The third model represents the friction between interlayers occuring due to the tensioned rock-bolts. Results obtained from this study compare favorably with those obtained from equations developed from model studies. An attempt has been made to study the effects of creep on the behavior of the rock-layer system.

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 …

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 …

Identification Of Linear System With Feedback Input, Jyh Yang

Theses

A new procedure with feedback input is presented for identification of continuous-time systems. Using Lyapunov's direct method to prove it asymptotic stability. For the procedure to be applicable, it's assumed that all the state variables of the plant are accessible and that there is no measurement noise so the model reference scheme can be used to identify the parameters of the plant.

The procedure results in the convergence of every parameter of a model to the corresponding one of the system as the time approaching to infinite i.e. t→∞. Digital computer simulations are provided to demonstrate the feasibility of the …

Microbial Characteristics Of An Industrial Mixed Liquor After Exposure To Phenolic Compounds, Patricia L. Boyle

Theses

The microbial characteristics of a mixed population from the Passaic Valley Sewerage Commissioners (PVSC) Wastewater Treatment Plant in Newark were examined. This plant handles about 250 million gallons per day of mixed sewerage, with a large industrial component. The microbial species were characterized using standard plating techniques, morphology, microscopic observation, and biochemical tests. These characteristics were determined for the fresh liquor, and after successive batch exposure to phenol (100 ppm) and 2-chlorophenol (20 ppm). Predator/prey, gram positive to gram negative bacteria ratios, and the fungi and protozoan populations were also determined. These results were compared with those previously obtained using …

Enhancement Of The Thermophysical Capability Of The Chemical Engineering Simulation System, Joydeep Banerjee

Theses

The CHESS (Chemical Engineering Emulation System) is a generalized steady-state, sequential-modular chemical process simulation program. In this thesis, the thermophysical data prediction capability of CHESS has been expanded by: incorporating more accurate thermodynamic phase-behavior models, by utilizing these models in generating a wider range of thermophysical properties, and providing an updated and expanded database for pure-component physical properties.

The overall performance of the simulation system's thermophysical package has been evaluated using the study of a subprocess consisting of various rotational equipment modules.

In this work, the Chao-Seader liquid phase activity coefficient model has been reinstalled in conjunction with the original …

A Study Of Parameters Indicating Microbial Activity In Mixed Aerobic Cultures, William Smith

Theses

Mixed liquor suspended solids (MLSS), oxygen uptake rate (OUR) and general dehydrogenase activity, as expressed by the reduction of the electron-acceptor Dye 3-(4',5'-dimethylthiazol-2-yl)-2, 4-diphenyltetra-zolium bromide (MTT), were compared for their ability to measure microbial activity in mixed aerobic cultures. A fourth parameter, specific enzyme activity, was dropped from consideration because of the difficulty of developing a satisfactory experimental technique. Measurement of the parameters was applied to the biodegradation of phenol and o-chlorophenol by activated sludge from a municipal sewage treatment plant, and by two commercially available bacterial preparations.

MLSS, although the most commonly used of the three parameters tested, is …

Robotic Application In Taiwan, Yun-Perng Doong

Theses

During the past years, as labor costs rose, safety and environmental regulations took hold and robotic capabilities became more sophisticated; therefore, robots became valuable pieces of production equipment. Manufacturers put robots on the job to consistently produce quality products, to work in a hazardous environment, or to perform heavy duty work which humans are not able to do. Although robots have so many benefits, robot application still meets a great deal of obstacles, especially in the areas of environmental restrictions, management capabilities, and social implications.

The objective of this thesis is to identify and discuss the robotics impact on the …

Further Development Of Preparation And Measurement Techniques For Triode-Sputtered Mercury Cadmium Telluride Thin Films, Tai-On Chan

Theses

The modified MRC 8800 R.F. triode sputtering system was used for mercury vapor sputtering (Hg^1-xCd^x)Te targets onto N-type (111) silicon substrates with a resistivity of 70 to 90 ohm-cm. Deposition rates were in the 2.6 to 3.6 A/sec range, A Hall mobility value, at 87°K, of 2550 Cm²/V•sec with a carrier concentration of 7(10¹⁵) cm^-3 was obtained for 9 μm thick films with an X-value of 0.25. Obtaining good sputtered films reliably was dependent on having targets that would not crack when bombarded with mercury ions. Improvements in the methods used …

Computer Analysis On Discontinuity Of Cylindrical Pressure Vessels With Various Heads, Ku-Shiang Sheu

Theses

This thesis uses FORTRAN programs to compute the maximum shear stresses of the cylindrical pressure vessel with various heads. They are cylindrical, spherical, ellipsoidal, flat and conic shapes. Also the maximum shear stresses for the bimetallic joints at the vessel wall and away from the vessel wall are analyzed. Numerical examples are given for each case to facilitate the applications.

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 …

Analysis Of Vehicle Suspension System Subjected To Random Vibration, Shabbir Lokhandwala

Theses

A two dimensional, two degree of freedom vehicle model is studied. A randomly profiled road is assumed to impart hyperbolic distributed stationary vertical random displacements to the front and the rear wheel. A computer program has been developed to evaluate transfer function matrices. The performance characteristic of the vehicle based on the Power Spectral Density of the vertical acceleration as well as the rattle space, for different values of damping factors, are studied.

Characterization Of G.C.A. Wafertrac 9000 Using Kodak Micro Positive 820 Resist And Developer Zx-934, Janet Chapin Mcfarland

Theses

A static coating program and a spray/static development program were developed, for use on the Wafertrac 9000 using Kodak Micro Positive 820 resist and developer ZX-934 in order to minimize critical dimension shift and maximize process latitude. By maximizing process latitude, a greater tolerance for process and equipment errors can be achieved. Using the established process, 1.2µm resist lines were produced and critical dimension shift was minimized providing a process with wide process latitude for creating photoresist geometries with dimensions larger than 1.2µm.

Adaptive Pattern Recognition Of Hand-Written Chinese Characters Using Fourier Transforms Of Projection Profiles, Der-Tsyi Chuang

Theses

None provided.

Image Reconstruction Using Wiener Filtering And Unsharp Masking: A Computer Model, Jay Berman

Theses

Research was conducted to computer model and compare the image reconstruction obtainable using Wiener filtering and unsharp masking. Wiener filtering and unsharp masking are techniques used to improve image quality and interpretation. It was demonstrated that far greater image restoration is obtained by Wiener filter than by unsharp masking because unsharp masking, unlike Wiener filtering, enhanced image noise along with the edges. A user friendly computer model, that may be used as a tutorial aid for Image Science students, incorporating Fast Fourier Transform (FFT) techniques was designed. Graphics allow the user to follow each stage of the image processing.