Digital Commons Network^™

Image, Media, And Installation, Chih-Fu Wang

Theses

None provided.

Microwave Treatment Of Hazardous Wastes : Chemical Fixation Of Insoluble Non-Volatile, Chemically Non-Reactive Organics In Soil, Naihong Zhu

Theses

Microwave treatment of hazardous wastes like dioxin-contaminated soil potentially fills a great need for a remediation technology which potentially can be applied in-situ: the EPA has concluded from a risk assessment study that it is the excavation and transportation of such wastes that poses the greatest risk. Studies have been carried out on a surrogate for dioxin, namely, 9,10-anthraquinone because it has similar chemical and physical properties but it is not toxic. It was found in microwave treatment studies that, at temperatures attainable in-situ, anthraquinone became non-extractable. A model was proposed which postulated that as water was removed from soil …

Vermillion Years, Fouad Ghazzaoui

Theses

None provided.

Interculturism, Shigeki Ito

Theses

None provided.

A Conceptual Look At Hodgkin's Disease, Todd K. Smith

Theses

None provided.

Grandma's Pitcher: A Series, Laura L. Winn

Theses

None provided.

A Study On Mentorship Within The Appraisal Profession, Kenneth M. Jenkins

Theses

The purpose of the study of mentorship within the appraisal profession is to determine the extent and perceived value of any existing mentorship within the profession in the Northern Virginia area. Employees indicate that of those persons having mentors, they advance professionally and monetarily more rapidly than those employees who don't have mentors. The employees who have no mentors indicate that the system is unfair, in that, the mentored employees are better "taken care of" when it comes to promotions, project selection, and training.

The literature bears out the employee comments . Many articles have been written extolling the virtues …

Centrifugal Modeling Of Leaking Underground Storage Tanks, Kuo-Neng George Chang

Theses

There are between 2 to 3.5 million Underground Storage Tanks (UST) located through this nation. Most of these tanks store gasoline and fuel oil. Many tanks in fact are or will soon be leaking, thus making them one of the major sources of groundwater contamination in USA. The fate and transport of chemicals from the leaking USTs is estimated from mathematical models. A major difficulty in these modeling efforts has been a crucial lack of information concerning the constitutive relationships governing multiphase contaminant movement.

Centrifugal modeling is an alternative to mathematical modeling, which may give an insight to the problem …

On The Estimation Of New Life Model Of Transformer Insulation Material Under Combined Electrical And Thermal Stress, Chiming Lin

Theses

Results of combined electrical and thermal aging and only thermal aging studies conducted on a 'fish' paper insulation material are presented in this thesis.

The model for aging has been proposed which is essentially the Arrhenius equation with a weighted factor {exp -cg/kT1 to describe the enhanced reaction rate process under combined thermal and electrical stress. A procedure has been described for evaluation of parameters of this new model.

It is seen that life estimates obtained with this model are close enough to the experimental results.

In addition, reliability data were also generated on the same material using electrical noise. …

Multiple Expert System, Umesh Kumar Mittal

Theses

In many domains, for example medical diagnosis, there are several sources of knowledge, e.g., several domain experts. These domain experts may have disagreements over some issues in the domain. Research in the area of human decision making suggests that a human decision is not always made based on the advice of a single expert. Many current expert systems, however, expect consistency in their knowledge bases. An expert system does not deliberate by reasoning that "on one hand..." but "on the other hand..." The knowledge engineer, who is not necessarily an expert in the same domain, ensures consistency by eliminating all …

The Application Of Feedback And Control System Theory To Organizational Modeling, Thomas Miklos Tamas

Theses

A review of the literature showed that relatively little attention has been given to the application of feedback and control systems to management. Since a major function of management is control, scientific management might offer assistance in the form of a more quantitative approach to management control. This thesis suggests one might accomplish this through the application of feedback and control systems.

The application of feedback and control theory to management systems is relatively new, however, literature has shown a trend towards the application of electrical engineering theory to non-engineering topics [Khranovich76]. There has also been some research in the …

Investigations Of Substitution Of Bi And Tl For Rare Earth Elements In Superconducting Rba2cu3oy, Jian Tang

Theses

Substitution of some other elements for rare earth or yttrium in high-T_c superconducting RBa₂Cu₃O_y compounds (R = Y, Nd, etc.) may improve chemical and physical properties of the materials, shed light on the superconducting mechanism of the new materials, and help to find new superconducting materials with even higher transition temperatures.

Bi³⁺ and Tl³⁺ have been reported earlier to result in higher T_c's in the related layer-structure compounds. The effect of electronegativity on superconductivity could be studied if substitution of Bi or Tl for Y or other rare earth elements …

Solid-Liquid Suspension In Agitated Vessels Provided With Multiple Impellers, Tong Li

Theses

A large number of references can be found in the literature on the effect of mixing parameters on the achievement of the minimum agitation speed to just suspend solid particles. In the vast majority of these studies the agitation system consisted of just one centrally mounted impeller. However, the determination of the minimum agitation speed to achieve the just suspended state when the additional impellers are used have received very little attention. It is the intent of this work to investigate the role of multiple impeller agitation system on the achievement of the complete particle suspension state. The effect of …

Fast Packet Switching For B-Isdn With Neural Net Control, Ajit K. Chaudhuri

Theses

The concept of integrated network where both the voice packet and data packet are delt with, started taking shape since 1970. Later, Users? demand for communication of data, voice, file, facsimile, image, videotext, videophone, videomovie has also been felt. All these services need bit rate of transmission in the order of 10, even 100 Mbits. An economical way to transmit this higher bit rate, with flexibility of bandwidth, is to treat voice/video in the form of packets and transmit those packets in real time. Studies of this kind of communication is carried out in Broadband ISDN ( BISDN). At this …

Thermal Desorption Of Contaminated Soils, Hsi-Ming Sung

Theses

A new method by employing the heating probe for the in-situ cleanup of soils that are contaminated with volatile organic hazardous substances is explored. This investigation is a laboratory simulation that was aimed to evaluate the feasibility of desorption of volatile organic compoumds (VOCs) from soil, and to determine the efficiency of the heating probe for maximum desorption.

Two organic compounds, Trichloroethylene, Carbon tetrachloride, were selected as simulants. The experimental results demonstrate that the removal efficiency range from 97.65% to >99.95% of Trichloroethylene and 98.14% to >99.95% of Carbon tetrachloride can be recovered for a 24 hour interval with a …

Analysis Of Chemical Contaminants In Tissue Samples From Two Species Of Fish, Michael David Reive

Theses

Interaction of marine species with chemical pollutants within the marine ecosystem is extremely complex and difficult to interpret. The purpose of this thesis was to investigate the effect of an exposure of treated municipal wastewater on winter flounder (Pseudopleuronectes americanus) and striped bass (Morone saxatilis). Fish from two locations were exposed to different concentrations of wastewater. Half of the fish from each tank were sacrificed, and the remaining fish were given a depuration period in unpolluted water. Tissue samples were composited, soxhlet extracted and passed through a florisil cleanup column. Gas chromatography, was used to analyze for hexachlorobenzene, hexachlorobutadiene, Aroclor …

A Machine Vision System With Remote Host, Chieyeon Jason Chen

Theses

The modem plays an important role in data communication using the Public Swiched Telephone Network. In this thesis, the modem function is merged into a low cost machine vision system based on the Motorola 68HC11. Evalation Board The system comprises the intelligent machine vision con- troller and a remotely located host computer, such as an IBM-PC. It, supports extra long distance communication capability so that the controller and the host can be anywhere in the world where then is a telephone line. Because of the limit of a 2100 bps modem, soft ware data compression is implemented here to save …

The Bandwidth Allocation Of Atm Through Genetic Algorithm, Hong Pan

Theses

In this thesis, we develop an optimization method based on Genetic Algorithm to achieve the bandwidth allocation of ATM network. In Broadband Integrated Service Digital Network (BISDN), the Asynchronous Transfer Model (ATM) is already adopted as the transfer standard by CCITT. ATM is a high-bandwidth, low-delay, fast-packet switching and multiplexing technique. Using ATM technique, we can flexibly reconfigure the network and reassign the bandwidth to meet the requirement of all types of services. As an effective optimization method, Genetic Algorithm(GA) is applied to implement the bandwidth allocation of ATM. GA is a class of search algorithm based on the mechanics …

Anaerobic Biological Treatment Of Incinerator Ash To Immobilize Toxic Metal Residues, Uma Parasar

Theses

In this study, a reliable and inexpensive method for biologically immobilizing toxic heavy metal residues present in very high concentrations in incinerator ash was developed. Desulfovibrzo, a genus of sulfate-reducing bacteria was cultured and treated with combined ash under anaerobic conditions. The carbon source, lactate, and the electron acceptor, sulfate, were provided to the cultures for their normal growth. Since the sulfate reducers utilize organic matter using sulfate as the oxidizing agent, sulfides are the corresponding end products of the reaction. Ash was added to well established cultures of desu f ovibrio. Immobilization of the heavy metals in the ash …

Design, Fabrication, And Testing Of Temperature Compensated Magfet, Dilip K. Sampath

Theses

A simple model based on dc behaviour of MOS transistors operating in weak inversion is derived on the basis of previous publications. The bipolar like source to drain transfer characteristics of MOS transistor in weak inversion was used to implement a voltage source that is proportional to absolute temperature (PTAT); a cell that can be stacked to obtain the desired voltage. A CMOS temperature compensated current reference is implemented using PTAT cell with MOSFET as current defining element. A CMOS magnetic field sensor has been developed. The sensitivity of sensor is dependant on the bias current; incorporation of temperature independent …

Comparative Study Of Prediction Gain Based On Neural Network Architecture, Prashant M. Shah

Theses

This thesis describes the Neural Network approach to design predictor using Delta and Generalized Delta Rule. The predictor is designed by supervised training based on the typical sequence of pixel values. Neural Network is used to find the coefficients of the predictor. Both 1-D and 2-D scheme of the pixels as well as linear and non-linear correlations are used to find the coefficients by training. Different combinations of pixels are used to find the "best" combination among the order of the predictor.

Gas Chromatographic Method For Determination Of 28 Volatile Organic Compounds Emitted From A Sewerage Plant, Yeming Sun

Theses

In this study, 28 volatile organic compounds (VOCs) emitted from the Linden Roselle Sewerage Authority Plant (LRSA) were monitered. The determination by gas chromatography (GC) is presented. This work emphasizes the collection of whole air samples, using a canister-based sampling system with cryogenic concentration. An appropriate temperature program was selected to obtain the best sample separation. The procedure for the identification of 28 standard gas mixture was achieved by comparing the chromatograms of sample with those of the specific groups of target compounds, as well as by comparing the sample with the results from GC Mass spectrometeric analysis. Because of …

Restaurant Meal Cost Trends In Five Of The Top 100 United States Business Travel Cities, Rebecca J. Englehart

Theses

Not listed.

Identifying Rural Touristic Preferences: A Case Of Orleans County, Rene Corene Rhodey

Theses

Not listed.

Motorcoach Carrier And Motorcoach Tour Industry Reviews, A. Timothy Bock

Theses

Not listed.

Food Marketing Distribution: A Pilot Study Of Ardmore Farms, Michele Ann Musella

Theses

Ardmore Farms is one product group that in part comprises the Food-service Division of Quaker Oats Company. They produce portion-controlled, USDA approved citrus and fruit juices. The juice is produced by one plant located in Deland, Florida. It is then shipped throughout the United States via a fleet of more than 120 refrigerated trucks. in fiscal year 1990 Ardmore experienced a financial crunch due to a freeze in Florida. To counteract the negative financial effects of the freeze, Ardmore hastily raised their orices. This aggravated the food-service operators resulting in a "fallout" of Ardmore's customer base. Also many regional juice …

A Descriptive Study On Trekking Attributes In Nepal Using Importance-Performance Analysis, Pasi Ryhanen

Theses

Since the opening of its doors to the outside world, Nepal has seen a large growth in tourist arrivals. One of the fast growing tourist markets attracted to Nepal is the trekking vacationers. In order for the suppliers and decision makers of the trekking product to be able to meet the demand of users it is important that they are able to target the development in the appropriate direction. A lack of communication among the components of the tourism industry has resulted in a lack of cooperation. The purpose of this study is to develop an instrument that enhances communication …

Disposable Versus Reusable Ware: Cost Evaluation Model Development, Ravi Pandit

Theses

The ever growing problem of solid waste, stricter environmental regulations, diminishing landfill space and escalating recycling costs have forced the foodservice operations using disposable ware to find economical alternatives to the solid waste generated. A computerized model was developed that enables foodservice operators to evaluate the cost differences between the use of disposable ware and reusable ware and further make a decision as to which ware is suitable, economically and environmentally, for their operation. The cost evaluation model was based on the 1969 Laventhol & Horwath model developed for the Permanent Ware Institute Chicago, Illinois. The model consists of three …

Identification Of Patterns And Characteristics Dealing With Private, Public, And Corporate Philanthropic Agencies Which Support Hotel, Food, And Travel Related Programs, Jeffrey N. Rowoth

Theses

The objective of this paper is to examine and compare the extent of support given by philanthropic agencies in the United States to college programs offering undergraduate and graduate degrees in Hotel, Food, and Travel Management. A focused sample was asked about certain characteristics surrounding their giving patterns to determine if there was an even distribution of financial support. The findings show that there is a high correlation of support directed to four year B.S. programs in public and private colleges.

A Comparison Of High-End Color System Halftones And Postscript-Generated Halftones, Mary Lee Schneider

Theses

The purpose of this study was to compare the quality of PostScriptgenerated four-color halftones to halftones produced by traditional high-end color systems. The quality issue is one that must be addressed before a decision can be made to move magazine production onto a complete desktop publishing platform. In moving layout and design functions onto a desktop publishing platform, publishers can take advantage of PostScript as a page-description language to electronically create complete pages. Electronic assembly would eliminate the mechanical stripping step, allowing great reductions in prepress manufacturing costs. There are two routes that can be taken to output these electronic …