Engineering Commons^™

Voice Recognition Using Neural Networks, Ganesh K. Venayagamoorthy, Viresh Moonasar, K. Sandrasegaran

Electrical and Computer Engineering Faculty Research & Creative Works

One solution to the crime and illegal immigration problem in South Africa may be the use of biometric techniques and technology. Biometrics are methods for recognizing a user based on unique physiological and/or behavioural characteristics of the user. This paper presents the results of ongoing work into using neural networks for voice recognition

Simulation Studies With A Continuously Online Trained Artificial Neural Network Controller For A Micro-Turbogenerator, Ganesh K. Venayagamoorthy, Ronald G. Harley

Electrical and Computer Engineering Faculty Research & Creative Works

This paper reports on the simulation studies carried out using MATLAB/SIMULINK and the practical implementation of a continuously online trained (COT) artificial neural network (ANN) controller to identify the continuous changing complex nonlinear dynamics of the power system, and another COT ANN to control a micro-turbogenerator which consists of a turbine simulator and a micro-alternator connected to an infinite bus through a short transmission line in a laboratory environment. This neural network controller augments/replaces the traditional automatic voltage regulator (AVR) and the turbine governor of the generator. Simulation and practical results are presented to show that this COT ANN identifier/controller …

A Practical Continually Online Trained Artificial Neural Network Controller For A Turbogenerator, Ganesh K. Venayagamoorthy, Ronald G. Harley

Electrical and Computer Engineering Faculty Research & Creative Works

This paper reports on the simulation and practical studies carried out on a single turbogenerator connected to an infinite bus through a short transmission line, with a continually online trained (COT) artificial neural network (ANN) controller to identify the turbogenerator, and another COT ANN to control the turbogenerator. This identifier/controller augments/replaces the automatic voltage regulator and the turbine governor. Results are presented to show that this COT ANN identifier/controller has the potential to allow turbogenerators to operate more closely to their steady-state stability limits and nevertheless “ride through” severe transient disturbances such as three phase faults. This allows greater usage …

Hydrocatalysis: A New Energy Paradigm For The 21st Century, Peter Mark Jansson

Theses and Dissertations

This thesis will review the problems of worldwide energy supply, describe the current technologies that meet the energy needs of our industrial societies, summarize the environmental impacts of those fuels and technologies and their increased use by a growing global and increasingly technical economy. This work will also describe and advance the technology being developed by BlackLight Power, Inc. [BLP], a scientific company located in Malvern, Pennsylvania. BLP's technology purports to offer commercially viable and useful heat generation via a previously unrecognized natural phenomenon - the catalytic reduction of the hydrogen atom to a lower energy state. A review of …

Investigation Of Radio Wave Propagation In The Martian Ionosphere Utilizing Hf Sounding Techniques, Robert J. Yowell

Theses and Dissertations

This thesis presents a preliminary design of an ionospheric sounder to be carried aboard one or more of NASA's Mars Surveyor landers. Past Russian and American probes have indicated the existence of an ionosphere, but none of these missions remotely sensed this atmospheric layer from the surface. The rationale for utilizing a surface-based Martian ionospheric sounder is discussed. Based on NASA's choice of launch vehicle and power source, a low-weight, low-powered Chirp sounder using a horizontally-polarized dipole antenna is recommended for the sounder experiment. The sounder experiment should be conducted for at least one Martian year, in order to investigate …

Noise Reduction For Speech Enhancement Using Non-Linear Wavelet Processing, Hassan Dehmani

Theses and Dissertations

The problem of speech enhancement presents many obstacles in the speech processing field. This thesis develops several speech de-noising systems that can be used in the time, fourier, and wavelet domains. We present two thresholding techniques soft and hard. The application of these thresholding techniques to noisy speech data is discussed. The combination of both wavelets and the Fourier domains with noisy phase restoration proves to yield the best results in terms of intelligibility. Informal listening tests were conducted in order to compare the effects and differences between the speech de-noising systems.

Polarimetric Fiber Optic Weigh-In-Motion Sensor, Jieping Wang

Theses

During the past decade, the demand for new methods of measuring the weight of moving vehicles has grown substantially. In the 1980's, several techniques for weighing vehicles in motion were developed. However, they often suffer from high installation and maintenance costs as well as low accuracy. This thesis describes a new technique based on polarization preserving optical fibers. A fibercore HB600 Bow-Tie fiber with an initial beat length of 1.16 mm was employed in the present study. Sensor response is discussed in terms of the effects of force amplitudes and velocities on the calibration parameter T_f. T_{f …}

Hydrogenation Effects On Trap Related Conduction In Diamond, Linwood Cleveland Watkins Iii

Electrical & Computer Engineering Theses & Dissertations

In this research work, the results of an experimental investigation on the electrical conduction mechanism in type Ιa and Ilb diamonds are presented. These results are compared with those of previous theoretical studies. The basic physical properties of diamond are discussed. Details of ohmic contact formation on diamond are presented.

The current-voltage characteristics revealed the presence of traps located below the Fermi level. The unfilled trap density was determined. The deep traps were further studied using spectroscopic photoconductivity measurements and the trap energy levels were determined.

The effects of hydrogenation on trap related conduction were studied subsequently. Hydrogenation was carried …

C/Ku Band Satellite Television Reception System, Costas A. Economides

Theses

The purpose of this thesis is to examine and investigate the design of a satellite reception system able to receive most C and Ku band North American geostationary satellites' TV transmissions. The performance criterion used for the system design is based on a required demodulated video signal-to-noise ratio maintained for a specified percentage of time in conjunction with overall cost considerations.

Furthermore, a computer program written in FORTRAN 77 is developed, which among other functions lists the notified, operational, geostationary satellites in sight with their corresponding look angles, from any given location on the earth.

Graphical Interpretation Of U.S. Tidal Data, Vaheh Shahbazian

Theses

Numerous Shore line operations relating to industry and conservation would benefit from convenient access to continuous tidal predictions. Easy Graphical access to continuous long term predictions of tidal heights at a location of interest will simplify operations that are sensetive to tidal predictions. A specific example, is the implementation of a protective measurements against flooding and destruction of shoreline facilities particularly at times of high tides.

This thesis consists of three things. First, rendering NOAA's data in a form accessable to a PC user. Second, it provides a Basic program for prediction of tides. Third , PC user programming Resourses …

Ua35/11 Student Honors Bulletin, Wku Honors Program

WKU Administration Documents

Student research papers chosen by each college as best of the academic year.

• Bolte, William. Use of Government Documents in Small and Medium-Sized Libraries and Future Utilization Prospects
• Brevit, Valery. Development of the Concepts of Infinity
• Cook, Ken. KIM-1 Calculator Interface
• Irwin, Tom. Status Preservation in Three Characteristic Radical Right Groups
• Logan, Ben. Jungian Psychoanalysis of the Petrarchan Lover
• Moore, James Jr. Communication Problems and the Families of Schizophrenics
• Nash, Jeffrey. St. Luke as Historian
• Porto, Eugenia. In Defense of Camus
• Roberson, Philip. The Religious Thought of Rabindranath Tagore
• Wood, Irene. The Them of Incest in Dickens' Hard Times

The Solar Connection -- Promise Or Peril?, Paul S. Strong

UMR-MEC Conference on Energy / UMR-DNR Conference on Energy

During the past decade important progress has been made in understanding the sun-earth environmental system. Modern observations of solar activity document changes in solar output over time scales ranging from seconds to decades, and evidence for longer term variations have been found in historical records. It follows that the sun cannot be considered to be a totally non-variable energy source. Continued research progress into solar-terrestrial interactions will hopefully provide an understanding of sun-weather/climate relationships resulting in energy conservation through more efficient energy utilization of our planet's atmospheric energy system.

The Energy Needs Of The Developing Countries, Vaman Rao

UMR-MEC Conference on Energy / UMR-DNR Conference on Energy

The energy needs of the developing countries are enormous. They will grow with the passage of time as the pace of economic development accelerates and those countries enter the industrial epoch. The sheer physical non-availability of coal and petroleum to most of them makes it obligatory to choose an unconventional resource as an energy-base. The nuclear fission is the only option now available which is feasible, less-expensive and plentiful. Solar and fusion may be the ultimate sources in the steady state, when appropriate technologies are developed.

Training Programs For Energy Management In Developing Countries, J. Byron Nelson, Burns E. Hegler, J. Derald Morgan

UMR-MEC Conference on Energy / UMR-DNR Conference on Energy

This paper discusses some of the general inter-related energy, management, and economic problems in developing countries as well as a common project methodology that can be used to formulate and implement development strategies according to the needs of any particular country. Because the development of human resources, especially managerial skills, is critically needed, the characteristics of managers in developing countries, the problems they face, and their training needs are discussed. Finally an example of a specific training program is outlined.

An Engineering, Geological And Hydrological Environmental Assessment Of A 250 Mmscfd Dry Ash Lurgi Coal Gasification Facility, Mason H. Somerville, James L. Elder, Stephen R. Moran

UMR-MEC Conference on Energy / UMR-DNR Conference on Energy

A preliminary engineering, geological, and hydrological environmental assessment of a proposed 250 MMSCFD dry ash Lurgi coal gasification facility is discussed.

The facility's emission spectrum is examined on the basis of the proposed design and empirical data. This system utilizes approximately 13 million tons of lignite and 17,000 acre feet of water per year and consumes 6500 tons of oxygen per day. The results of the study indicate that the major gaseous effluent is CO₂, that the federal limits on SO₂ effluent may be met, and that the atmospheric degradation criterion will be the most difficult one …

Integrated Circuits, Julio Garcia

Graduate Research Papers

The technology of integrated circuits is_ almost new in Peru, writer's country-. It is being used mainly in black and white television sets and in some audio amplifier equipment. As any new technology, first, it is necessary to be very familiar with it in order to exploit it adequately and get all the benefits from it. The writer feels this lack of knowledge, and wants to take advantage of being here to learn the technology and techniques for using integrated circuits.

A Study Of Stability Of Ac And Dc Transmission Lines Operated In Parallel., Tzyy-Cheng Wang

Masters Theses

"This thesis is concerned with the analysis, optimization and simulation of parallel operation of ac and de transmission lines.

An introduction and literature review are provided to give background information on how the parallel operation should be considered. The parallel system is analyzed, and the state equation is derived for determining the stability limit. The optimization of the control law U = Fx is determined by a standard quadratic cost function. Prefault, during fault and postfault situations in the parallel operation has been simulated by Continuous System Modeling program. Some comparison and comments are made between 1 ac, 1 de …