Digital Commons Network^™

The Use Of Self-Managed Teams In Service Industries, Henry F. De Mena

Theses

Self-managed teams in business and industry are groups of workers assigned to perform a complete function in the operation of their company. ream members, when well-trained and multi-skilled, are flexible enough to rotate between positions as needed and to perform the various tasks which compose the complete function. The teams are autonomous, in that they manage themselves. Team leaders are resource persons, not directors. The organizations in which they are used are flat (managerial-wise) since little middle management is required.

Such teams are not uncommon in manufacturing industries. As yet, however, they are less frequently found in service industries, even …

Optimization Of Bandwidth Allocation In Atm Nets Through Simulated Annealing, Chien-Long Hou

Theses

Optimization of Bandwidth Allocation in ATM network is considered in this thesis. We address the problem of determining optimal bandwidth allocation in such BISDN's that adopt ATM as their basic switching. technique by using Simulated Annealing. Computer simulation shows that this optimal policy leads to the configuration which yields the minimum average packet delay.

Edge Matching Of Aerial Scenery Using Fourier Descriptors, Ananth Kittappa

Theses

In this report an integrated method of classifying aerial images as related to photo stereo grammetry is discussed. In this method, an investigation of Fourier descriptors as features for the edge matching approach is carried out. The efficient calculation of the Fourier Descriptors is made possible by applying the polygonal approximation method to the original edges. In order for the features to be invariant to rotation, scaling and starting point shift, a normalization technique is adopted. Initially the Fourier Descriptors are tested for synthesized test datasets and it was proved that the variances of the Normalized Fourier Descriptors was a …

Landmark-Based Shape Recognition By A Modified Hopfield Neural Network, Kuowei Li

Theses

In this thesis, we introduce a new thethod to achieve partial shape recognition by means of a modified Hopfield neural network. To recognize partially visible object, we represent each object by a set of "landmarks." The landmarks of an object are points of interest relative to the object that have important shape attributes. Given a scene consisting of partially occluded objects, a model object in the scene is hypothesized by matching the landmarks of the model with those in the scene. A measure of similarity between two landmarks, one from a model and the other from the scene, is needed …

A Quantization Noise Feedback Technique In Pyramid Image Coding, Zhili Lin

Theses

In communication, we frequently encounter the problem about the trans-mission rate and quantization noise. That is, small quantization noise or high fidelity definitely increases transmission rate, or large quantization noise or low fidelity might require low transmission rate. In our research, we developed a quantization noise feedback technique, with which quantization noise can be reduced greatly at a given transmission rate. We applied this technique in pyramid image coding environment. An error analysis in frequency domain was carried out. Error estimation for pyramid image coding with and without quantization noise feedback was made. Finally, plenty of computer simulation confirms our …

Decomposing Non-Product Form Queuing Lattices Through Simulated Annealing, Jr-Chin Lin

Theses

A random, heuristic search called Simulated Annealing is adapted to decompose the state transition lattice of Non-Product Form Queuing Models. Simulated Annealing Algorithm has been successfully applied to a number of optimization problem such as The Traveling Salesman Problem, Graph Partionning, Physical Computer Design, VLSI Chip Design, Image Processing,... etc. It has the advantage over other gradient descent techniques to solve the combinatorial problems. The solution can escape from local minimum by adding Boltzmann Distribution Factor to the algorithm. Most lattice of non-product form queuing models can be decomposed into Solvable Subsets through this algorithm, and solvable subset is the …

Emergency Preparedness : Disaster Planning For Health Facilities, Narendra R. Patel

Theses

There seems little that can be done to eradicate or even control natural disasters, considering the current state-of-the-art. If nothing can be done to prevent them, we must be prepared to cope with them whenever they do occur.

One possibility for greater assurance that hospital will properly accomplish its post disaster mission is an up-to-date, well-thought-out " Hospital Emergency Preparedness Plan." A well written and rehearsed disaster plan is essential for the proper and timely care of casualties arising from an internal or external disaster.

This thesis attempts to bring together many widely dispersed studies, disaster experiences and principles that …

Microcomputer-Based Visual Controller And Data Logger System, Xiao-Fang Qi

Theses

This thesis paper describes the firmware design, instead of the hardware logic design, makes the machine vision hardware system economical, intelligent and expandable. It shows the construction and testing of a novel remote low speed machine vision control system, which also has functions as data logger and is capable of auto control. The system has 9 analog input channels available, and more. It also has 4 digital output channels for controlling external devices. This work also implemented a way to transfer the grabbed image to a PC/XT. In the 256 graphics mode of the VGA, 64 B&W gray levels can …

A Novel Schottky Barrier Mosfet For Vlsi Applications, Venkata S. Simhadri

Theses

Schottky barrier MOSFETs are expected to offer certain fabrication advantages, low series resistance and the feasibility to go into sub-micron technology without having short-channel effects. A p-channel MOSFET using Schottky contacts as source and drain is reviewed theoritically. The limitations of the device arising from the oxide offset between source/channel is studied with the help of one dimensional simulation SEDAN. The process sequence leads to an offset between source and channel. The performance of the SBMOSFETs with and without offset is estimated using two dimensional device simulation program PISCES-II for PtSi and IrSi as source and drain material. A novel …

Reflection And Transmission Through Achiral-Chiral Interface, Jia-Feng Wang

Theses

Electromagnetic wave propagation through an achiral-chiral interface is analyzed via Maxwell's equations using the appropriate boundary conditions. Experimental data for reflected power from achiral-chiral interface was found to be in qualitative agreement with the analytical results. In addition, coupled mode equations for chiral cladding waveguides were derived and solved for weak coupling. The experimental results of chiral cladding waveguides show that an average of about 0.2° per cm in polarization rotation occurred. These waveguides were fabricated by using spin-coating deposition. The sense of the rotation was found to be independent of the handness of the cladding chirality, which was predicted …

Measurement Of Cluster Size By Retarding Potential And Time-Of- Flight Methods In An Ionized Cluster Beam Deposition System, Yung-Kuan Wang

Theses

The goal of this research was to study the mass distribution of ions generated in the Ionized Cluster Beam (ICB) deposition system. The ICB deposition method has been used to form high quality films of metals and other materials. It was postulated that the clusters consisting of hundreds and thousands of atoms produced by vapor expansion in the ICB source are responsible for the superior film properties. However, consistent experimental evidence concerning the cluster mass distribution, or even the existence of such clusters in the ICB apparatus, was lacking.

Two methods of cluster ion mass spectroscopy were used in this …

Neural Net Classification Of States In Finite State Vector Quantization, Zhigang Zhang

Theses

In this thesis, a new image coding technique based on Neural Network Finite State Vector Quantization(NNFSVQ) is presented. The new design takes advantage of the high interblock spatial correlation of pixels in typical grey-level images, in addition to intrablock correlation already exploited by vector quantization (VQ). Although many FSVQ require large memory space for the storage of the numerous state codebooks, the memory space requirement of NNFSVQ can be reduced by a very large factor (about 10²-10³) to manageable size without impairing image quality. Simulation experiments have shown that by using NNFSVQ the bit rate can …

Thin Film Adhesion Measurement Using Excimer Laser Ablation Test, Wen-Chieh Lee

Theses

An excimer laser incident on a metallic thin film is used to measure the adhesion between the film and the substrate. The initial optical absorption leads to electron excitation. After collisions and degradation of the excited electrons, the absorbed energy is transferred into various kinds of energy among which the major one is thermal. The superheated surface undergoes vapor explosion which serves as one source of shock wave to break the thin film. The evaporated particles may recoil back to the surface constructing another shock wave to break the film. In addition, a tensile stress may be formed by the …

An Interferometric Method For Evaluating Holographic Materials, Roger C. Sumner

Theses

A new method for evaluating the performance of holographic optical elements and holographic materials is described. The method involves recording a spherical holographic lens, aligning the lens in an interferometer, obtaining an interferogram, and analyzing the interferogram with fringe interpretation software . The analysis of the holographic lens provides a direct measure of the optical performance including the wavefront error or optical path difference, the point spread function, the MTF, and a set of Zernike polynomial coefficients. The aberration coefficients could prove to be very useful in quantifying the limiting performance of the holographic material as well as establishing a …

A Methodology For Nmos Vlsi Manufacturing: From Design To Test, Thecla Chomicz

Theses

The development of a methodology to integrate design automation with the fabrication of very large scale integrated circuits is presented. A multiplier circuit is used as an example of a full custom circuit development, simulation and layout using Apollo workstations. Several other circuits, such as a 16x1 static random access memory (SRAM), a three bit counter, and a stepper motor controller, are included in the final layout. The final layout also includes smaller test circuits such as an AND gate, a shift register and a full adder. The discussion of circuit simulation includes the calculation of SPICE model parameters based …

Design Of A Microengineered Pressure Sensor, Ranjeet Alexis

Theses

A new family of microengineered vacuum ionization gauges of an approximate volume of 200µ³ has been designed. These devices can he fabricated using existing semiconductor processing capabilities. The focus of this thesis is to scale down the current state-of-the-art for ionization sensors to micron dimensions. These gauges can be manufactured economically and potentially will be integrated with more complex structures and circuitry. In these devices an active ionization volume of micron dimensions is used for launching ions in a trajectory towards a collection electrode. Ionization of gas species is accomplished by an electron flux of sufficient energy. Analysis of …

Decomposing Non-Product Form Queuing Lattices Through Genetic Algorithm, Wei Han

Theses

In this paper, a Genetic Algorithm technique is adapted to decompose the state transition lattice of a class of non-product form queueing models. Genetic Algorithms are search algorithms based upon the mechanics of natural genetics. They combine a survival-of-the-fittest among string structures with a structured, yet randomized, information exchange to form a search algorithm with some of the innovative flair of human search. While randomized, genetic algorithms are no simple random walk. They efficiently exploit historical information to speculate on new search points with improved performance. Here genetic algorithms is applied to a non-product queueing lattices optimization problem. Only the …

Computer Animation: The Animation Capabilities Of The Genigraphics 100c, Pamela Barth Stainback

Theses

None provided.

Comparative Analysis Of Single And Double Dwell Acquisition Schemes, Gurinder Singh Ahluwalia

Theses

Single and double dwell pseudonoise (PN) acquisition systems are described, explained and analyzed. These systems are designed to synchronize a locally generated PN signal with a received PN signal of unknown phase in the presence of noise. The mean, variance and an approximate probability distribution function (PDF) of the acquisition time for the single and double dwell PN acquisition schemes is developed. Intuitively, the double dwell acquisition system should be superior to the single dwell system because of the ability to quickly dismiss incorrect cells and further verify probable hits. It is shown analytically that this is in fact true …

Taiwan's Economic Development, Liwen Chang

Theses

Development, by definition, brings new resources into a society that allow for a higher standard of living. Many developing nations which changed from a traditional survival type society to a self-supporting society experienced a high rate of economic growth after the World War II. No matter what route these countries or regions took to success, in the process of development they all faced similar international trade and balance of payments problems.

This paper presents a case study of Taiwan as a developing country's model. Taiwan certainly qualifies as a successful example of development. Although there is really no complete normative …

Improving The Throughput Of Plasticating Extruders : Measurement Of The Interparticulate Friction Coefficient For Polymeric Particulates With Circular And Profiled Cross Sections, Aiping Chen

Theses

This thesis deals with the coefficient of friction between individual polymeric pellets, the interparticulate friction coefficient (IPFC). It has been measured using a shear cell for a wide variety of circular and profiled cross?section pellets for a variery of polymeric materials. First, the thesis explains the reasons why it is desirable to enhance the IPFC based on the melting mechanisms in a single screw plasticating extruder. By making pellets with profiled cross?section pellets, the IPFC is greater than for pellets of circular cross?section. Second, it describes the test apparatus for measuring the IPFC and the method for calculating the IPFC. …

Point Pattern Matching By A Genetic Algroithm, Minghwang Chen

Theses

The problem we consider is to find a subset of points in a pattern that best match to a subset of points in another pattern through a transformation in a least squares sense. Exhaustive search to find the best assignment mapping one set of points to another set is, if the number of points that are to be matched is large, computationally expensive. We develop a genetic algorithm which searches for the best ("almost the best") assignment efficiently. To map the point pattern matching into the framework of a genetic algorithm, we use a fitness function which inversely proportional to …

Performance Evaluation Of Consumer Electronic Bus, Sairaj R. Pakkam

Theses

This thesis describes the performance evaluation of the Consumer Electronic Bus proposed by the Electronic Industries Association. To study the behaviour of CEBUS under different traffic conditions, a simulation program was developed modelling the layer architecture of CEBUS. The CEBUS is based on the ISO/OSI model of layered architecture. The simulation results have shown that, when the throughput of the network is small, the delay is bounded for all messages of all priorities. As the throughput of the network increases, under the presence of more high priority messages, the lower priority messages get queued at their nodes. It is also …

Hardware Algorithms For Computing Transcendental Functions, Xin-Pei Gong

Theses

The COordinate Rotation Digital Computer(CORDIC) is a special-purpose digital computer for real-time airborne computation. In this computer, a unique computing technique is employed which is especially suitable for solving the trigonometric relationships. A new computing technique based on the CORDIC algorithm is developed to reduce the number of iterations by one half for each input angle. This improvement is accomplished. by scanning multiple bits of the input angle(in our case, two) at a time. The CORDIC equations are rewritten accordingly and a hardware implementation structure is also presented. The results of the software simulation of the new algorithm are as …

A Critical Analysis On Cogeneration Policy, R. Tjahjokartiko Gondokusumo

Theses

It could be difficult to understand electricity problems without knowing its history; how a combine of legal, administration, and financial means effects electricity in the development. The recent public law on energy-related issues traceable by this study is the Renewable Energy and Energy Efficiency Technology Competitiveness Act of 1989.

In short, cogeneration was proposed to utility (as public property) from industry (as private property) under PURPA (of which National Energy Act is the legislative history). Thus, it should be clear that the problems of cogeneration is not pro or contra issues. It is a national issue. Then, a cogeneration planner …

Conditional Artificial Dielectric Waveguide, Hsien-Wen Ho

Theses

A thin layer of semiconductor ( the guest material ) is sandwiched between two polymeric films ( the host material ) to form an artificial dielectric waveguide. An artificial dielectric is a composite material consisting of a dielectric with a large number of conducting particles arranged in a three-dimensional pattern. The particle dimensions are smaller than the optical wavelength of interest. A beam of light with a photon energy above the band-gap of the semiconductor ( pump light ) induces electric and magnetic dipoles which affect the propagation of light with a photon energy below the band-gap ( probe light …

Scatterer Number Density Estimation For Tissue Characterization In Ultrasound Imaging, Hui Zhu

Theses

Ultrasound RF signal, backscattered from an inhomogeneous parenchymal tissue has the character of a random signal. It is the random fluctuating nature of this signal that is responsible for the speckle pattern observed in the images. These random signals, nevertheless, bear information related to the random scattering structure of the medium. Statistical moments of the signal can serve as feature parameters that are related to mean scatterer spacing in the random structure. However, such a feature is biased because the statistical nature of the RF signal depends, not only on the random tissue scattering structure, but also on the resolution …

Imagination Makes Things Perfect, Donna Lee Rollins

Theses

None provided.

Laser Diodes Incorporating Diffractive Features, Mark Meyers

Theses

Laser diode structures which incorporate diffractive features (such as linear gratings or focusing output couplers) have several advantages in terms of device performance and increased flexibility. In this paper the properties of distributed feedback (DFB) and distributed bragg reflector (DBR) laser diodes are compared with those of cleaved cavity fabry-perot type laser diodes. Analysis of the propagation of light in the waveguide formed by the GaAlAs/GaAs/GaAlAs heterostructure will reveal how the interaction of light with periodic variations in dielectric interface can provide the optical feedback neccessary for lasing to occur. The resulting laser light wavelength is significantly less sensitive to …

Light And Landscape, Stacey Neale

Theses

None provided.