Digital Commons Network^™

Polar Spectrum Coding, Daniel Harris Chapman

Retrospective Theses and Dissertations

Polar Spectrum Coding is a novel speech coding algorithm for narrowband voice communications. A polar Fourier transform of the signal is computed, and the magnitude and phase of the speech spectrum is encoded for transmission. The correlation between frames of speech signals is exploited to minimize the transmission rate required for intelligible speech. At the receiver, the encoded words are decoded and the spectrum reconstructed. An inverse Fourier transform is performed, and the result is the reconstructed speech waveform. Polar Spectrum Coding theory is explained. The sensitivities of various parameters on performance are explored, and performance in the presence of …

Analysis Of Phase Noise In Phase Lock Loop, Diane Marie Pavik

Retrospective Theses and Dissertations

This research report presents an introduction into phase lock loops (PLL) with a major emphasis on calculating phase noise in frequency synthesizers. A PLL model that incorporates the major sources of noise is presented for the purpose of design analysis. The model can be used to analyze second and fifth order PLLs which allows the accurate calculation of phase noise as a function of independent variable design parameters. The stability of PLLs is also analyzed to show the effects of a marginally stable system on the resultant phase noise. Developing an accurate PLL model which accounts for the major sources …

Gapp Instruction Simulator, Ronald P. Bauman

Retrospective Theses and Dissertations

A need was recognized for the development of a hardware independent simulator for the Geometric Arithmetic Parallel Processor, or GAPP. This simulator would allow the user to test algorithms targeted to GAPP systems using readily available personnel computers. The development of the simulation, a GAPP Instruction Simulator, or GIS, is the basis of this research report. This report includes a discussion of earlier parallel processors of similar type to the GAPP, a discussion of the GAPP's operation and instructions, and illustrations of GAPP applications. The report focuses on the GAPP Instruction Simulator with a discussion of its operation and a …

Axisymmetric Wave Propagation In A Finite Linear Elastic Cylinder, Brian D. Johnson

Retrospective Theses and Dissertations

This work addresses the linear elastic analysis of axisymmetric wave propagation in a finite elastic cylinder. The waves are generated by the Fast Triaxial Device (FTRXD), which fails soil specimens at very rapid rates. The very short duration of the triaxial tests requires the consideration of wave phenomena in the analysis of the test results.

The soil specimens are modeled as linear elastic cylinders which are compressed in the axial direction. The resulting axisymmetric waves are analyzed with the wave equations which are cast in finite difference form, allowing the solution of displacements and stresses throughout the cylinder as a …

Continuous Time Convolution Model For Generation Synthetic Hydrographs, Cheryl Brooks

Retrospective Theses and Dissertations

Synthetic hydrographs are often used in stormwater management to provide estimates of peak rate, volume and time distribution of stormwater runoff. A hydrograph model based on the mathematical technique of convolution was developed using an exponential routing response function and the basic watershed continuity equation. After incorporating the model into a computer program, it was calibrated using hydrographs from four urban and three rural watersheds. The watersheds are located in regions of west and south Florida and range in size from 14.7 to 3500 acres. Two other hydrograph models, the Soil Conservation Service's Unit Hydrograph (SCS-UH) mode 1 and the …

Idiosyncratic Item Selection Effects: Do They Produce The Incongruity Effect?/, Susan E. Haynes

Retrospective Theses and Dissertations

This study examined the recall of subject-generated and experimenter-provided target words as a function of whether or not the encoding cue was congruous or incongruous. Previous research has established that, for experimenter-provided items, congruous targets are recalled better than incongruous targets. However, in the case of self-generated targets, some researchers have reported a reversal of this effect ("the incongruity effect") while others have not. The subjects were 55 undergraduate psychology students from the University of Central Florida.

In the experimenter-provided condition, subjects received congruous and incongruous question stems with the target word written in directly below the question. In the …

The Development Of Non-Credit Programming Within Florida's Community College System : The First Thirty Years, 1957-1987, Ann Sherry Herring

Retrospective Theses and Dissertations

No abstract provided.

Variation In Female Somatic Condition And Its Relationship To Reproduction In The Sailfin Molly, Poecilia Latipinna (Pisces: Poeciliidae), Richard Eugene Smith

Retrospective Theses and Dissertations

Seasonal and gestational variation in the somatic and reproductive condition of females was determined for two east-central Florida populations of the livebearing fish Poecilia latipinna. Females were sampled monthly between January 1985 and January 1986 at Badge Station (BDGST) and Titusville Ditch (TDTCH) study sites. In addition, collections were made at approximately 8 day intervals in April and August. Somatic condition was determined by calculating index values for dry weight (somatic tissue minus water), lipid, and protein from overall regression equations relating these components to female body size. Significant seasonal variation in somatic condition existed within the two study sites. …

Crummer Graduate School, Rollins College

Text Materials of Central Florida

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

Part-Time Mba, Rollins College

Text Materials of Central Florida

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

Leader Sex And Task Orientation: An Information Processing Perspective, Thomas Arthur Buhr

Retrospective Theses and Dissertations

The role of leadership and its effect on small group function and efficiency has led to a wealth of research data. Of particular importance to the real world outside the laboratory and the classroom are the leadership variables of sex and task orientation. In the last two decades, women have assumed more leadership positions in the business and political world than at any other time in the past (White, De Sanctis & Crino, 1981). In addition, there has been a call to examine the many different ways a leader can approach the group to accomplish a task (Fiedler, 1978). Two …

Utilization Of Ambulatory Services By The Health Maintenance Organization Of Florida, Thomas Harold Hansen

Retrospective Theses and Dissertations

The utilization of ambulatory services by the health maintenance organization of Florida (HMO), independent practice association (IPA) model, was compared to a fee-for-service population. Each randomly selected group consisted of 250 patients being cared for by the same providers, at the same clinic, during the calendar year 1986. Demographic and clinical data was gathered from the office charts. Frequencies were evaluated by the Statistical Package for the Social Sciences and t-tests were run to substantiate variance at the 0.05 level of confidence. The HMO group is a younger population (t = 0.017), and the males are responsible for the increased …

Applications Of Lattice Filters To Quadrature Mirror Filter Banks, Gregory R. Jaspers

Retrospective Theses and Dissertations

Presented is a method for designing and implementing lattice filters to be used in Quadrature Mirror Filter (QMF) Banks. Quadrature Mirror Filter Banks find use in applications where a signal must be spilt into subbands operated on then reconstructed in the output. Because of their structure, lattice filters do this very well and allow perfect reconstruction, even when the lattice coefficients must be quantized. In this paper QMF's and Lattice Filters are derived and analyzed. Application of the lattice filter is presented along with a design program and example of its use to implement a QMF. The computer aided design …

Mandate For Fear Appeal Research: A Clearer Perspective, Elizabeth Cheney Michel

Retrospective Theses and Dissertations

The fear appeal is one of the most prevalent types of persuasion evident in society. A great percentage of advertising bases its success on "an appeal calculated to elicit anxiety on the part of the listener" (Miller, 1963, p. 117). Children have been reared on its admonitions. Nearly every American is by now familiar with the Surgeon General's Warning. The recent AIDS epidemic has prompted a highly consequential use of this appeal. If the effectuality of everyday fear persuasions can be left to chance, choice, or Mother Nature, this last lethal onslaught demands immediate attention from the communication community. An …

The Impact On Competency Acquisition, Development, And Performance Of Intern Principals In Two Florida School Districts Using The Preparing New Principals Program, Paul Van Mitchell

Retrospective Theses and Dissertations

No abstract provided.

Evaluation Of Inversion Uab1, A Bithorax-Complex Mutant, Gerhild Rathmann Packert

Retrospective Theses and Dissertations

No abstract provided.

An Ada Simulator For The Structured Functional Simulation Of A Digital Signal Processing System, Christopher Paul Roney

Retrospective Theses and Dissertations

A behavioral-level simulator designed for FIRST, a silicon compilation system for digital signal processing, is implemented in the Ada* programming language. The simulator accepts as input a digital signal processing system description written for the FIRST ([ast Implementation of aealtime ~ignal transforms) silicon compiler, and provides an interactive post-processing signal trace facility. The simulator is a time-driven simulator which contains a FIRST description language parser, a subset of the FIRST primitives, and the capacity for maintaining a full history of all signals in the system. The primitives in the FIRST description language are common to digital signal processing systems (e.g., …

Lymphocyte Subpopulations And Other Laboratory Parameters In Patients With The Acquired Immune Deficiency Syndrome (Aids) And Related Conditions, Steven C. Shivers

Retrospective Theses and Dissertations

Patients with Acquired Immune Deficiency Syndrome (AIDS), AIDS-Related Complex (ARC) and other high-risk individuals were evaluated for lymphocyte subsets and serum levels of IgG, IgA, IgM, complement C3 and C4, B2-rnicroglobulin, circulating immune complexes and antibodies to HIV (1). Patients with other immunologic diseases not related to AIDS and healthy individuals not at risk for AIDS were also included in the study. AIDS-related patients overall showed significant (p < .05) relative and absolute decreases helper/inducer T cells, and relative and absolute increases in suppressor/ cytotoxic T cells, resulting in dramatic decreases in helper to suppressor ratios. Relative decreases in total T cells and increases in B cells and natural killer (NK) cells were also observed in some AIDSrelated patients. Four patients not at risk for AIDS had borderline and possibly false positive HIV antibody results. Antibody levels in one of these patients gradually changed to negative after a period of a few weeks. AIDS-related patients overall were also found to have significant (p < .05) increases in serum levels of imrnunoglobulins, B2-microglobulin, and circulating immune complexes. Significant changes in serum levels of Complement C3 and C4 were not observed.

Evaluation Perception Of Training Effectiveness Of U.S. Marines As Influenced By Experience And Demographic Variables, Sharon K. Wolford

Retrospective Theses and Dissertations

This research evaluates the Headquarters United States Marine Corps method of conducting analysis surveys to obtain information on perception of training effectiveness. Independent variables of rank, time in service, time in grade, time in MOS, location, and MOS held were considered to see if they have a significant effect on how a Marine perceives the effectiveness of his "formal school training before assignment to billet." Multiple regression analysis was performed with time in MOS, rank, time in grade, and time in service as independent variables. Regression data revealed that no significant relationship exists between these independent variables and the training …

Ethical Decisions: Willingness To Apply Understood Ethical Principles, Margaret A. Wilkins

Retrospective Theses and Dissertations

No abstract provided.

Learning Curve Model For Interrupted Production, Behzad Zarkoob

Retrospective Theses and Dissertations

Traditionally the learning curve technique has been applied to the case of continuous production. In such cases the cost par unit declines by a constant or staged percentage due to the learning phenomenon. Although this technique has been an important management tool to predict cost and productivity, there are other factors that wil~ affect the learning curves and its forecasts. One of these factors is "forgetfulness," which is caused by program interruptions for a significant period of time. It is expected that due to the interruption a relearning process may have to take place. The objective of this report is …

Learning English Language And Literature In Saudi Arabian Universities: Students' Perceptions Of Successful And Unsuccessful Methodologies, Safa Mansouri

Retrospective Theses and Dissertations

This study focuses on identifying students' perceptions of the most successful and least successful methodologies of teaching/ learning- English language and literature in Saudi Arabian universities. The study employed a questionnaire format, which was distributed to the English Departments of three Saudi Arabian universities and one college for women, to gather data. Data analysis revealed that students had many problems, especially with Old and Middle English literature. Language problems, cultural differences, and unfamiliarity with the literary or historical backgrounds of the English literature were cited as the major obstacles to learning. Students of any foreign ,literature need a constantly improved …

The Effects Of A Twelve-Week Cardiac Rehabilitation Program On Patients With Severe Left Ventricular Dysfunction As Evaluated By First-Pass Radionuclide Angiography, Ronald Lee Dudash

Retrospective Theses and Dissertations

No abstract provided.

Lansim: A Simulation Package For Estimating Performance Characteristics Of A Class Of Local Area Networks, Gregory Charles Buchner

Retrospective Theses and Dissertations

ABSTRACT During recent years, the trends in computer resource organization have seen the replacement of the traditional mainframe computers and their timesharing terminals with individual desktop workstations. These workstations can offer more computational power than the mainframes of less than a decade ago. With this distribution of processing from the more traditional mainframe computer comes the need to share peripheral resources among these desktop workstations. These include items such as file systems, tape drives, printers, plotters, and graphics display devices. A common way to share these among the multi-computer environment is to provide a transparent gateway that allows each workstation …

Display Peripheral For A Flight Simulator Using A Three-Dimensional Computer-Controlled Motor Driven Model, Kenneth Randall Flowers

Retrospective Theses and Dissertations

The flight simulator display peripheral, described herein, provides the visual aide necessary for observation of effects due to operator responses for any aircraft simulator which prohibits the observers from occupying space within the cockpit of the simulator.

This display peripheral is provided by a three-dimensional, computer-controlled, motor-driven model which duplicates the angular movements generated by the aircraft simulator by moving a model aircraft mounted within a clear plastic ball.

The display utilizes a Motorola 68000 educational computer board to translate the three aircraft angles. pitch, yaw and roll received from the aircraft simulator via an RS-232C compatible serial asynchronous communication …

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, 1988-1989, Rollins College

Text Materials of Central Florida

Rollins College catalogue 1988-1989 with list of faculty and students and courses by department.

Feasibility Analysis For Proposed Entertainment Facilities At China City In London, Harrison Price Company

Harrison "Buzz" Price Papers

Mountleigh Tianjin Dockland P.L.C. retained the Harrison Price Company to prepare a feasibility analysis for the revised entertainment program. The contract calls for an assessment of the potential markets, projections of attendance and patronage, recommended sizing and capacity guidelines, pricing, revenue generating potential, and a proforma financial analysis. This report summarizes the most pertinent data, analysis and findings of the feasibility analysis.

American Opinion Of The Soviet/Vatican Struggle 1917-1933, Jeffrey P. Begeal

Retrospective Theses and Dissertations

No abstract provided.

Coping And Adjustment In Parents Of Abducted Children, Karen A. Bogart

Retrospective Theses and Dissertations

No abstract provided.