Engineering Commons^™

Automatic Contour Extraction From Hvem Image Of Microvessel, Yong-Gang Liu

Theses

The research work reported in the thesis is motivated by the problem raised in the biomedical research utilizing high voltage electron microscope (HVEM) to study microvessels. There the contour data of cross-sections of microvessels are fed into some special electronic device to reconstruct three-dimensional pictures of microvessels. However, the contour data acquisition as routinely conducted by manual operation. This tedious procedure costs large amount of human power.

In this thesis, computer image processing techniques are applied to replace the time-consuming manual operation. A synthetic method is recommended. A software with various digital image processing functions has been developed and tested …

Finite Element Stress Analysis Of Engine Piston, Anil Nanalal Mistry

Theses

In this analysis, Ford Motor Company's, modular engine seriespiston was selected for the analysis purposes. The engine has a capacity of 4.6 liter, V-8 cylinder and with 2 valves.The piston is made of aluminum alloy material Z-16-T6. A three-dimensional finite element model was created to analyze the piston. The model, which contains only the quarter section of the piston due to loading symmetry and geometry, was used to calculate operating temperatures and the corresponding thermal expansion. Operating stresses due to thermal and mechanical loads were also calculated. The accuracy of the model was verified by material data published in the …

A Comparative Study Of Edge Detection Techniques, Jaskaran Singh Dhaliwal

Theses

The problem of detecting edges in gray level digital images is considered. A literature survey of the existing methods is presented. Based on the survey, two methods that are well accepted by a majority of investigators are identified. The methods selected are: 1) Laplacian of Gaussian (LoG) operator, and 2) An optimal detector based on maxima in gradient magnitude of a Gaussian-smoothed image. The latter has been proposed by Canny[], and will be referred as Canny's method. The purpose of the thesis is to compare the performance of these popular methods. In order to increase the scope of such comparison, …

A Stereo Vision Technique Based On The Multi-Positioned Camera Criterion, Jie Bao

Theses

A modified feature based stereo vision [sic] technique is described in this thesis. The technique uses the curve-segments as the feature primitives in the matching process. The local characteristics of the curve-segments are extracted by the, Generalized Hough Transform.

A set of images of a scene, which are taken by a multi-positioned camera satisfying the parallelism criterion, are first filtered by the Laplacian of a Gaussian operator in different widths, i.e. coarse to fine channels. At each channel, the Generalized Hough Transform is applied to the curve-segments in each image. The curve position, the curve-length, the curve centroid, the average …

Token Bus Lan Performance : Modeling And Simulation, Ramesh Kurnool

Theses

A simulation model based on CSIM, a process oriented simulated language, to analyze the performance of the Token Bus protocol is developed. Performance measures such as throughput, average delay and maximum delay per packet are presented. System performance is analyzed for different loads, number of stations, network lengths, different physical and logical distribution of the stations with packet length as a parameter. Previous studies were based on the delay-throughput analysis with no discussion on the effect of variation of the logical and physical distribution of the stations on the performance of the model which is done in the present thesis. …

Statistical Process Control For High Precision Deep Drawn Sheet Metal Parts, Sunil S. Shah

Theses

In today's world, industrial expertise has come to be judged in terms of the quality of the product. Good quality has become the ultimate aim in a manufacturing environment, which leads to many innovations for ease in the inspection of parts. In considering a metal working company like Hudson Tool & Die Company, a study of the various operations and the application of Statistical Process Control to the forming operations is performed using STORM software. Important characteristics have been carefully studied with regards to metal forming like uniform metal thickness, radius of the bend, depth of the drawing operation. In-depth …

Study Of Essential Factors Affecting The Efficiency Of Sludge Digestion, I-Chang Tsao

Theses

The sludge produced by wastewater treatment plant has some major characteristics such as high COD ( 52093 mg/1 - 79683 mg/1) and VS ( 19247 mg/1 - 44178 mg/1). The present laboratory investigation has indicated that successful treatment and purification of the subject of sludge is possible using multiple-stage anaerobic digestion system.

The multiple-stage system is capable of degrading 40-55% of COD and 50 to 60% of VS. The conventional digestion system degrades 30-45% of COD and 40-50% of VS. After treated by conventional system and multiple-stage system, the concentration of COD and VS are still high (21200 mg/1 - …

Behavior Of Slender High Strength Steel Fiber Reinforced Concrete Columns Under Combined Biaxial Bending And Axial Compression, Tzuoh-Jaw Wu

Theses

A total of four slender high strength steel fiber ( 20 vol. hooked ends 1 in and 2 in ) reinforced concrete columns were casted, cured and tested to failure under biaxially eccentric load us—KT MTS testing system. The experimental load-deflection behavior exhibits not only the ascending branch but also the descending branch of the load and deformation curves.

The experimental ultimate load capacity was analyzed by the equation of Failure Surface Method developed by Hsu. recently, the result shows that the analysis method is able to predict the ultimate load value for biaxially loaded slender concrete columns.

For biaxially …

Development Of Air-Break Circuit Breaker, Ravi Kanth Korrapati

Theses

This thesis describes the development of an Air-Break circuit breaker, for Heinemann Electric Co., New Jersey, using I-DEAS CAD software. The physical properties obtained from the software, for the components of the armature assembly and the contact arm and the carriage, are used in determining the initial forces on a helical delay spring and in calculating accelerations of links in the trip mechanism. The trip mechanism is a four-bar mechanism with a spring as a coupler. Two second order differential equations define the motion of its links, the contact arm and the carriage. A time history of the links is …

Memory Card Memory Read-Out Module For 8052ah Basic Single Board Computer, Yongyi Sun

Theses

A Memory Card Memory Read-out Module is described that is used to collect the data stored in the RAMs of 8052AH BASIC SBCs and transfer it to the storage of another system called stationary recall unit.

The motivation for this system is as follows:

Automatic Rail Diagnostic System (ARDS) of New Jersey Transit Rail Operation (NJTRO) will revolutionize the maintenance of rail cars by monitoring selected on-board subsystems and components. The on-board unit of ARDS is a data gatherer. It can collect data describing the status and performance of selected on-board operating subsystems and components. A 8052AH BASIC SBC is …

Investigation Of Material Erosion By Abrasive Water Jet Cutting, Fang Hu

Theses

This study is concerned with the investigation of material erosion phenomena occurring in the abrasive waterjet (AWJ) cutting process.

A series of scratches were generated by the abrasive waterjet on the polished surface of aluminum samples. The tests were carried out at different traverse speeds, abrasive flow rates, diameters of sapphire nozzles, diameters of carbide tubes and initial abrasive particle sizes. Material volume loss in the erosion zone was measured directly or calculated by the use of the suggested mathematical models. An analysis of experimental results enabled us to introduce a new process criterion, particle distribution density, which determines the …

An Adaptive Robotic Controller With High Robustness, Xiao-Tian Wen

Theses

A complex industrial application of robotic manipulators are beyond the capability of the relatively simple constant gain linear control system. They compensate poorly for nonlinear dynamic model and environment changes, especially when the plant model comes with the unknown coefficients. An adaptive controller for a two joints robotic arm is designed in this thesis. Firstly, the highly coupled nonlinear model is linearized, and then an adaptive regulator is employed which adjust the controller parameters directly based on the on-line parameter estimation, where a least square identification is used. At last the computer simulation is also performed.

Performance Evaluation And Comparison Of Ordinary, Adaptive And Exhaustive Service In The Token Ring Network, Darshakkumar J. Patel

Theses

In the token ring network different types of services gives different delay characteristics. Results to date have shown that in asymmetric traffic, exhaustive service gives more delay to lightly loaded stations where ordinary service wastes time in circulating the token after each transmission. In general, there is a need for more efficient service, which is compromised between ordinary and exhaustive service.

Ordinary and exhaustive service are analyzed in this thesis, and a new service, adaptive service, is proposed. By using timer and counter, adaptive service dynamically changes token holding time at the station. Different types of delay characteristics are derived …

An Investigation Of The Dynamics Of Abrasive Waterjet Formation, Md. Ekramul Hasan Khan

Theses

The aim of this research was to investigate the jet formation and the jet behavior, as characterized by the velocity field, the force exerted by the jet on a work-piece and the jet geometry. The velocity and force distributions were measured using a laser transit anemometer (LTA) and a piezoelectric force transducer (PFT) respectively for constant water pressure (334.6 MPa) supply. The jet structure and its instantaneous behavior were visualized by the used of high speed filming. LTA and PFT measuring techniques were established and verified. The measurements were performed under different operating conditions. It was found that at a …

Eeg Mapping Using The Personal Computer, Zhuan-Zhang Pei

Theses

An approach for brain electrical activity mapping using a personal computer has been investigated to enhance the visibility of the EECs. An automatic procedure from data acquisition to the final mapping has been developed for on-line or off-line data processing, in which a table-look-up technique has been introduced to eliminate redundant processing. The power spectra in different EEC frequency bands for four electrodes are coded into 15 colors and mapped on a color monitor. The data correspondings to the areas between electrodes are interpolated by the surface spline method. The mapping speed and smoothness has been optimized. An experiment has …

Teaching Mechanical Design Using The Axiomatic Approach, Lisa E. Hailey

Theses

Many authors on the subject of design state that it cannot be taught, it must be learned through experience. This thesis offers a method in which design can be taught to senior mechanical engineering students. The axiomatic approach to design, authored by Dr. Nam P. Suh of the Massachusetts Institute of Technology, states that all good designs follow two axioms, the independence axiom and the information axiom. By teaching students to use these axioms, and the corollaries and theorems derived from the axioms, educators can teach students the basic concepts of good design.

To show how this approach can be …

Automatic Infrared Inspection Of Solder Joints On Mounted Circuit Boards, Ken Kekuan Zhou

Theses

This thesis reports the research work on automatic infrared and visual light inspections of solder joints on printed circuit boards (PCBs) utilizing an image processing system and statistical pattern recognition techniques.

A small scale image processing system, consisting of a SUN workstation and several DATACUBE modules, is set up for the research. Software packages for imaging, displaying and solder joint inspection are developed and ready for public usage.

The capability of infrared inspection for solder joints on PCBs is demonstrated. The fusing of infrared and visual light imagery for the inspection is shown to offer better results than that obtainable …

Selection Of Master Degrees Of Freedom In Model Reduction Techniques, Yixing Qi

Theses

Based on the model reduction technique called SEREP (System Equivalent Reduction Expansion Process), systematic ways to select the master degrees of freedom (the degrees of freedom kept in the reduced model) are developed and their usefulness is demonstrated by the examples. The following two criteria are ' developed for two specific objectives.

When we need to identify the response of the full model from the response of the reduced model (usually obtained from the experiments,) we hope to reduce the estimation error between the estimated response and the actual one. We also hope to keep the points which will have …

Modification Of Turret For Enhancement Of Internal Turning Operations On A Cnc Lathe, Talla Rajasekhar

Theses

Towards the modification of the CNC turret a complete set of tool holders have been designed. They have been manufactured and installed according to the specifications. A detailed study of MARK CENTURY 2000 controller and PartMaster is presented. Additionally a component has been designed to be machined on the CNC lathe utilizing the MC2000 part programming capabilities. The part program of the machine component has been developed utilizing various phases of MC2000's Partmaster software. The generated part program has been executed on the CNC lathe.

A Suggested Model Program For Cim Education, Sema E. Alptekin

Industrial and Manufacturing Engineering

No abstract provided.

Adaptive Scheduling And Control Using Artificial Neural Networks And Expert Systems For A Hierarchical/Distributed Fms Architecture, Luis Carlos Rabelo, Sema E. Alptekin

Industrial and Manufacturing Engineering

An adaptive expert scheduler was developed that learns by itself and adapts to the dynamic FMS environment. This hybrid system uses a symbiotic architecture composed of expert systems (ESs) and artificial neural networks (ANNs) and provides a learning scheme guided by past experience. The artificial neural networks recognize patterns in the tasks to be solved in order to select the best scheduling rule according to different criteria. The expert systems, on the other hand, drive the inference strategy and interpret the constraints and restrictions imposed by the upper levels of the control hierarchy of the flexible manufacturing system. The level …

Long-Range Planning Cost Model For Support Of Future Space Missions By The Deep Space Network, J. S. Sherif, Donald S. Remer, H. R. Buchanan

All HMC Faculty Publications and Research

A simple model is suggested to do long-range planning cost estimates for Deep Space Network (DSP) support of future space missions. The model estimates total DSN preparation costs and the annual distribution of these costs for long-range budgetary planning. The cost model is based on actual DSN preparation costs from four space missions: Galileo, Voyager (Uranus), Voyager (Neptune), and Magellan. The model was tested against the four projects and gave cost estimates that range from 18 percent above the actual total preparation costs of the projects to 25 percent below. The model was also compared to two other independent projects: …

An Effective Cube Comparison Method For Discrete Spectral Transformations Of Logic Functions, Ingo SchäFer

Dissertations and Theses

Spectral methods have been used for many applications in digital logic design, digital signal processing and telecommunications. In digital logic design they are implemented for testing of logical networks, multiplexer-based logic synthesis, signal processing, image processing and pattern analysis. New developments of more efficient algorithms for spectral transformations (Rademacher-Walsh, Generalized Reed-Muller, Adding, Arithmetic, multiple-valued Walsh and multiple-valued Generalized Reed- Muller) their implementation and applications will be described.

Acuta Enews May 1990, Vol. 19, No. 5

ACUTA Newsletters

In This Issue

IU installs first cohesive telecom network

Fun for the whole family in Orlando

Message From the President

Membership to elect VP, Secretary, Treasurer

On your own with the On-Call Book

Party Line

IU achieves first cohesive telecom system

Design Of Automotive Structural Components Using High Strength Sheet Steels Effect Of Strain Rate On Material Properties Of Sheet Steels And Structural Strengths Of Cold-Formed Steel Members, Maher Kassar, Wei-Wen Yu

CCFSS Library (1939 - present)

In structural design, the material properties of steels and the strengths of cold-formed steel members are affected by strain rate. Two subjects were investigated experimentally and analytically in this study. They are 1) effect of strain rate on mechanical properties of sheet steels in tension and compression, and 2) structural strengths of stub columns and beams subjected to dynamic loads. Three sheet steels with nominal yield strengths ranging from 35 to 100 ksi were studied under different strain rates. A total of 124 tensile coupons and 54 compressive coupons were tested in this phase of study. The structural strengths of …

Stress Cracking And Breakage Susceptibility As Affected By Moisture Content At Harvest For Four Yellow Dent Corn Hybrids, Curtis Weller, M. R. Paulsen, M. P. Steinberg

Department of Agricultural and Biological Systems Engineering: Faculty Publications

Four hybrids of yellow dent com were harvested at three levels of moisture content. After drying, samples were analyzed for stress cracking and susceptibility to breakage in Wisconsin (WBT) and Stein (SBT) breakage testers. Significant differences in stress cracking and breakage susceptibility as determined with the WBT and the SBT were observed among the four hybrids. Breakage susceptibility as measured with the WBT and SBT significantly increased as the harvest moisture increased. Stress cracks increased significantly as harvest moisture increased within the drying air temperatures of 49, 71, and 93° C. WBT breakage susceptibility significantly increased as drying air temperature …

Trends In Air Transportation Between The Usa And The Asia/Pacific Region With Particular Consideration Of United Airlines' Acquisition Of The Pan Am Pacific Division, Michael Hanke

Master's Theses - Daytona Beach

This study deals with the development of scheduled passenger traffic between the USA and selected countries in the ICAO Asia/Pacific region from 1977 to 1987. Among the significant trends are the growth in scheduled passenger traffic volume and the increase in both the percentage share of US citizens and foreign flag carriers. This study focuses on United Airlines' acquisition of Pan Am's Pacific Division in 1985. An analysis of selected Pan Am transpacific services in terms of market share and quality of service before 1985 shows a general declining trend. The main reasons for this development include Pan Am's poor …

Btc Test Methodology, Gaurav Garg

All Computer Science and Engineering Research

This paper describes the testing methodology for the Broadcast Translation Circuit. It covers logic simulation, timing simulation, and a single push-button test for the device. The document is intended to be a supplement to documents WUCS-89-52 and WUCS-90-19, which outline the design of the BTC in full details. The intent of a push-button test is to have a single test that causes the device to process every type of packets that it could receive. This would include various combination of RC and OP fields, a test that examines every table entry thoroughly, as well as a test of the parity …

The History Of The Trinity Highway: A Study In Transportation Dynamics, Richard Wilutus

Books and Other Publications

Although the primary focus of this thesis is a history of California 299--the Trinity Highway, I have studied the construction of that road in the context of the history of transportation between Weaverville and Humboldt Bay. The history of a transportation network is not only a history of connections between people and places but also, in this remote region, the vital link connecting wilderness with civilization.

Ever since the settlement of the Weaverville area in 1848, its residents have sought reliable transportation to Humboldt Bay's seaport and merchandise. During this period a road has connected these two places for less …

Computer Data Acquisition, Control, And Analysis For The University Of Tennessee At Chattanooga's Internal Combustion Engine Labratory, Ahmad Noureddine

Masters Theses and Doctoral Dissertations

For any data acquisition instrumentation, it is essential to have a voltage or current signal output from any transducer that needs to be monitored.Nine OMEGA thermocouples were installed on the Ford engine-Megatech dynamometer system to monitor the temperature of the exhaust gases at different locations and the coolants entering and leaving the dynamometer and the radiator.Those thermocouples have an output signal of O - 55 mv.The TESCOM gas analyzer system measures the concentrations of the different gases present in the exhaust system of the engine and produces an analog output signal (0 - 100 mv) that is used for data …