Digital Commons Network^™

Approximate Trigonometric Expansions With Applications To Signal Decomposition And Coding, Qurban A. Memon

Retrospective Theses and Dissertations

Signal representation and data coding for multi-dimensional signals have recently received considerable attention due to their importance to several modern technologies. Many useful contributions have been reported that employ wavelets and transform methods. For signal representation, it is always desired that a signal be represented using minimum number of parameters. The transform efficiency and ease of its implementation are to a large extent mutually incompatible. If a stationary process is not periodic, then the coefficients of its Fourier expansion are not uncorrelated. With the exception of periodic signals the expansion of such a process as a superposition of exponentials, particularly …

A Study To Determine Which Factors Contribute To The Implementation Of A Successful Primary Multiage/Nongraded Program, Vicki Hils Osborne

Retrospective Theses and Dissertations

Child growth and development pedagogy suggests that not all children are ready to learn the same thing, at the same time, in the same way. Multiage/nongraded programs allow pupils to advance from one concept or skill level to the next as they are ready, regardless of age or grade, which results in continuous progress. Multiage/nongraded education has a solid foundation or research and experience to support its use. However, many questions still exist regarding the factors that contribute to the implementation of a successful primary multiage/nongraded program.

The purpose of this ethnographic study was to identify the (a) critical attributes …

Cavity Model Analysis Of Microstrip Ring Antennas Using Green's Functions, Javier Gomez Tagle Rangel

Retrospective Theses and Dissertations

Microstrip ring antennas have been experimentally tested by several researchers due to their specific radiation characteristics that make them very suitable for many applications, from medical uses to mobile communications. Ring antennas have been found to have a larger bandwidth compared to other conventional types of microstrip patch antennas. Further more, their size is smaller when compared to circular and rectangular resonant structures. The TM1m modes (m = 2,4,6 .. , where m represents radial variations) radiate conical beams in the broadside direction, while TM nl modes (n = 2,4,6 .. , where n represents azimuthal variations) have a radiation …

University Of Central Florida 3 Year Fact Book - 1993-1996, University Of Central Florida

Historical Fact Book and Enrollment

Historical fact book and enrollment data for the University of Central Florida.

Computing Optimal Cocomo Effort Multiplier Values And Optimal Casebase Subsets Using Monte Carlo Methods, Robert Joseph Maidhof

Retrospective Theses and Dissertations

There have been many studies performed and techniques applied to solve the problem of estimating man-month effort for software projects. Despite all the effort expended to solving this problem the results achieved from the various techniques have not been embraced by the software community as very reliable or accurate. This thesis uses Monte Carlo methods to obtain optimal values for COCOMO effort multipliers which minimize the average of the absolute values of the relative errors (AARE) of man-month estimate for two industry supplied casebases. For example, when using three COCOMO cost drivers (complexity, language experience, application experience) and the COCOMO …

Integer Quantum Hall Effect For Hard-Core Bosons And A Failure Of Bosonic Chern-Simons Mean-Field Theories For Electrons At A Half-Filled Landau Level, O. Heinonen, M. D. Johnson

Faculty Bibliography 1990s

Field-theoretical methods have been shown to be useful in constructing simple effective theories for two-dimensional (2D) systems. These effective theories are usually studied by perturbing around a mean-field approximation, so the question as to whether such an approximation is meaningful arises immediately. We here study 2D interacting electrons in a half-filled Landau level mapped onto interacting hard-core bosons in a magnetic field. We argue that an interacting hard-core boson system in a uniform external field such that there is one flux quantum per particle (unit filling) exhibits an integer quantum Hall effect. As a consequence, the mean-field approximation for mapping …

One-Dimensional Spatial Solitary Waves Due To Cascaded Second-Order Nonlinearities In Planar Waveguides, Roland Schiek, Yongsoon Baek, George I. Stegeman

Faculty Bibliography 1990s

We report an experimental observation of one-dimensional spatial solitary waves due to cascaded second-order optical nonlinearities.

Effects Of Mode Structure On Three-Dimensional Laser Heating Due To Single Or Multiple Rectangular Laser Beams, A. Kar, J. E. Scott, W. P. Latham

Faculty Bibliography 1990s

The natural shape of a typical chemical oxygen-iodine laser (COIL) beam is rectangular which means that the transverse cross section of the beam is rectangular. Such a rectangular beam can be split into two or more beams to carry out materials processing. The distance between such beams and the mode structure in the beams can affect the distribution of heat in the workpiece. This, in turn, affects the quality and efficiency of materials processing. A three-dimensional quasi-steady-state thermal model is presented in this article, and an expression for the temperature distribution during laser heating with single or multiple COIL beams …

Dielectric Screening In The Thomas-Fermi Model, B. K. Shivamoggi, P. Mulser

Faculty Bibliography 1990s

In this paper, we investigate the dielectric screening process in the Thomas-Fermi model with several variations such as the thermal effects, relativistic effects, motion of the test charge, and the effect of a very strong magnetic field. Comparisons are made with the corresponding results in a classical plasma. Some apparently anomalous results are pointed out and explained.

Dielectric Screening In A Plasma: Some Rigorous Results, Bhimsen K. Shivamoggi

Faculty Bibliography 1990s

In this article, we give some rigorous results about the properties of the solution of Poisson's equation describing dielectric screening by electrons trapped and/or untrapped in the Coulomb field of the test charge.

The Growing Family Of Spatial Solitons, G. I. Stegeman

Faculty Bibliography 1990s

The recent proliferation of spatial solitons which have been observed experimentally is discussed.

Rollins College Brevard Campus, Rollins College

Text Materials of Central Florida

Rollins College catalogue with list of faculty and students and courses by department.

Rollins College Catalogue, 1996-1997, Rollins College

Text Materials of Central Florida

Rollins College catalogue 1996-1997 with list of faculty and students and courses by department.

Rollins College Winter Term 1996, Rollins College

Text Materials of Central Florida

Rollins College catalogue with list of faculty and students and courses by department.

Use Of Noncognitive Variables To Predict Academic Success And Retention Among A Group Of White Academically Disadvantaged College Students, Pamela Krake Fletcher

Retrospective Theses and Dissertations

At many American colleges and universities, efforts to enhance the retention of a diverse group of students have become a priority. This study represents part of this effort at the University of Central Florida, a large public suburban state university in the South. Specifically, this investigation evaluated Pegasus '95 and the Academic Mentoring Program offered in the Summer and Fall Semesters of 1995 to specially-admitted students who fell short of regular admissions requirements. During the summer, Pegasus '95 provided testing, orientation, guided course work, study skills workshops, and mentoring, both individually and in the context of cohesive socialization groups of …

Finding Paths In The Rotation Graph Of Binary Trees, Rodney O. Rogers

Retrospective Theses and Dissertations

A binary tree coding scheme is a bijection mapping a set of binary trees to a set of integer tuples called codewords. One problem considered in the literature is that of listing the codewords for n-node binary trees, such that successive codewords represent trees differing by a single rotation, a standard operation for rebalancing binary search trees. Then, the codeword sequence corresponds to an Hamiltonian path in the rotation graph R_n of binary trees, where each node is labelled with an n-node binary tree, and an edge connects two nodes when their trees differ by a …

Analysis Of Threaded Joint Behavior In An Airbag Module Assembly, Rustam Chemat

Retrospective Theses and Dissertations

While some of think of our cars as simply "buckets of bolts", the proper design choices, applications, and assemblies of threaded fasteners/bolted joints play critical roles in automobile safety.

Supplemental Restraint Systems (SRS), more commonly known as airbags, help prevent vehicle occupants from being thrown forward into the dashboard or windshield in the event of a collision. The components comprising the airbag, the inflator, the backing plate, and the cover are connected to each other, and to the vehicle, through a series of threaded fasteners. Proper and timely deployment of the airbag depends largely on the selection of suitable threaded …

Analysis Of Frequency Selective Surfaces With Ferrite Substrates, Youcheng Liu

Retrospective Theses and Dissertations

Frequency selective surfaces (FSS) have numerous applications in several microwave and optical systems. Most frequency selective surface structures have one or more dielectric substrates. In this work, instead of traditional dielectric substrates, ferrite substrates are used under different dc bias conditions. By using ferrite materials, one can change the spectral properties of these structures without physically altering them. An applied magnetic field (dc bias) on the ferrite substrate changes its properties and hence the electrical dimensions of the elements comprising the periodic structure. Thus by simply applying a dc bias, the transmission and reflection properties of the periodic structure can …

Analysis Of Parental Choice : Islamic School Enrollment In Florida, Feryal Y. Elkhaldy

Retrospective Theses and Dissertations

The purpose of this study was to discover and interpret reasons Florida parents enrolled their children in Islamic schools. A selection of 30 parents from 3 different schools in Florida were interviewed by the researcher using a semistructured interview guide which used both oral and written responses. The sample was matched according to the gender of parents interviewed - 15 mothers and 15 fathers were interviewed. the sample was matched according to the gender of the referent child. Out of 30 referent children, 15 were female and 15 were male. The researcher included children of all grade levels. Fifteen were …

College Of Arts And Sciences 1995 - 1996 Annual Report : A Report Of Academic And Scholarly Activities, University Of Central Florida. College Of Arts And Sciences

Research Activities & Annual Reports

University of Central Florida College of Arts and Sciences, report of academic and scholarly activities, July 1995 - June 1996.

Scans And The "Goals 2,000: Educate America Act" -- External Validation For Expanding Communication Instruction Requirements Across The Undergraduate Core Curriculum, Craig Newburger

Journal of the Association for Communication Administration

This article discusses the role of the Goals 2,000: Educate America Act in expanding communication instruction requirement across the undergraduate core curriculum. The act provides funds to underwrite states development and implementation of content and performance standards and associated assessment methodologies directed towards helping students meet nationally determined academic and occupational skill standards. The National Council on Education Standards and Testing recommended the development of education standards that will provide direction for voluntary compliance by the states. The speech communication field has been actively involved in developing a national assessment agenda and corresponding communication skills assessment instruments and methodologies.

The Ucf Report, Vol. 18 No. 11, December 15, 1995, University Of Central Florida

The UCF Report

Pilot program creates Athlete Ambassadors for UCF; UCF to publish index on confidence of tourism industry; UCF study shows most teenage pregnancies fathered by adults.

Sandspur, Vol 102 No 12, November 30, 1995, Rollins College

The Rollins Sandspur

Rollins College student newspaper, written by the students and published at Rollins College. The Sandspur started as a literary journal.

The Ucf Report, Vol. 18 No. 8, November 3, 1995, University Of Central Florida

The UCF Report

Researchers develop plastic supports for bridges; UCF Homecoming fun still in progress; New graphics standards create unified look for UCF.

The Ucf Report, Vol. 18 No. 6, October 6, 1995, University Of Central Florida

The UCF Report

Vice president leaves UCF for retirement after 28 years; Internationally known alum to display artworks at UCF gallery.

The Ucf Report, Vol. 18 No. 5, September 22, 1995, University Of Central Florida

The UCF Report

Board of Regents approves UCF's Campus master plan; Coca-Cola donates $50,000 towards UCF scholarship fund; engineering professors look for cure to highway headaches.

The Ucf Report, Vol. 18 No. 4, September 8, 1995, University Of Central Florida

The UCF Report

President Hitt gives praise and update to faculty; Displaced military personnel find help with new program; National speaker to headline at Sexual Assault Awareness Week.

The Ucf Report, Vol. 18 No. 3, August 25, 1995, University Of Central Florida

The UCF Report

Tuition hike proposed for 1996-'97 budget; New director named for Orlando-UCF Shakespeare Festival; More classes + more programs + more students = fall term.

Power Converter Possessing Zero-Voltage Switching And Output Isolation, Issa Batarseh, Kasemsan Siri

UCF Patents

A modified boost converter accomplishes power transfer to a load with an electrical isolation, a zero-voltage and a zero-current switching, a transformer core resetting mechanism, and component stresses identical to those in the conventional boost converters. The power converter contains two switching devices, a main one connected in parallel and a secondary one connected in series with a transformer primary winding. A secondary winding of the transformer is connected through an output rectifier to the load. Zero-voltage switching and proper transformer-core resetting are achieved from the resonance that exists between the parasitic capacitance of the secondary switching device and the …

The Ucf Report, Vol. 18 No. 1, July 14, 1995, University Of Central Florida

The UCF Report

UCF steps up efforts to advise, speed academic progress; Building projects thrive on campus; Computer scientist develops artificial intelligence for answering questions.