Digital Commons Network^™

Pulse Width Modulated Adaptive Delta Modem Design And Analysis, Gregory L. Milne

Retrospective Theses and Dissertations

A unique design of a voiceband adaptive delta modem will be presented. The modulator utilizes a constant amplitude variable width pulse combined with the principles of delta modulation. This results in a modem that has lower amplitude distortion, requires less transmission channel bandwidth, and is less prone to slope overload than conventional adaptive delta modems. The design also allows the use of a simple single integration demodulator while maintaining fidelity.

The modem design and analysis is presented assuming a transmission channel which is bandwidth limited and amplitude limited.

The Stress-Buffering Role Of Social Report And Self-Efficiency Among First-Year Graduate Students, Mary T. Cecchini

Retrospective Theses and Dissertations

No abstract provided.

Attitude Similarity, Expertness And Perceived Counselor Trustworthiness, Sharon Lee Mckay

Retrospective Theses and Dissertations

This analogue study investigated the relationship between the "therapeugenic" (Bloom & Trautt, 1978) factors of attitude similarity and expertness on perceived trustworthiness of a confederate counselor. Several investigators have demonstrated that attitude similarity is positively related to perceived attractiveness, likeability and competence of counselors (Good, 1975; Griffitt & Byrne, 1970; Trautt, Finer & Calisher, 1980). There has been mixed support, however, for the notion that counselors who are perceived as "expert" will positively impact the counseling relationship (Brischetto & Merluzzi, 1981; Kunin & Rodin, 1982; Strong & Schmidt, 1970). The present study expanded previous research by jointly manipulating attitude similarity …

Comparable Worth: Gender Bias In Salary Administration, Delora Mcdaniel

Retrospective Theses and Dissertations

Comparable worth, an idea that is playing an increasingly important role in the wage and compensation issues of the 1980s, is examined in a controlled classroom setting. Salary as a function of rater gender and job stereotyping (as measured on a ranked order) was examined using undergraduate student subjects. Seven position descriptions from a savings and loan association were subjectively evaluated. The subjects assigned salaries, rank ordered the positions on a male to female (male=l, female=?) continuum and completed an Attitude toward Women Scale (AWS). Modest support was found for the hypothesis that salary would be a function of rater …

The Relationship Between Role Conflict And Ambiguity And Types Of Communication Moderated By Organization Level, Charles A. Olsson

Retrospective Theses and Dissertations

No abstract provided.

Gatekeepers And Their Role In The Selection Of Press Releases, Martha L. Nixon

Retrospective Theses and Dissertations

No abstract provided.

Marital Satisfaction As A Function Of Gender, Own Rationality And Spouse's Rationality, Gabrielle T. Vincent

Retrospective Theses and Dissertations

No abstract provided.

Metalinguistic Tasks For Adolescent Children, Mary D. Griffin

Retrospective Theses and Dissertations

No abstract provided.

An Investigation Of Career Development By Community College And University Women : Importance Of Contributors To Advancement Into Higher Education Administration, Lynda A. Kuyper

Retrospective Theses and Dissertations

Surveys of women in higher education administrative positions that identified factors which may contribute to career development have been conducted. However, the literature revealed little information regarding the importance placed on those factors by women in higher education administrative positions. The purpose of this study was to determine the importance of selected contributors to career development of women in higher education administration. Data were gathered by a mailed questionnaire to a sample of women administrators employed in Florida state supported community colleges and universities. The 343 useable returned questionnaires represented a 65.5% response rate and 51.3% of the total population. …

Phase-Locked Loop Based Oscillator Phase Noise Measurement Technique, Luis M. Jimenez

Retrospective Theses and Dissertations

Oscillators play an important role in the performance of various radio frequency (RF) systems. The generation of stable carrier and clock frequencies is necessary at both the transmitter and receiver ends of a communication system. Phase noise is the parameter used to characterize an oscillator frequency stability. This thesis introduces a phase noise measurement technique using a phase-locked loop. A 100 MHz Colpitt’s oscillator, for the phase noise source, was designed and built. The output of the oscillator was mixed down to 10 MHz, before a phase-locked loop extracted the phase noise information. Measurements were taken at RF frequencies using …

College Of Engineering Research Activities And Annual Report, July 1, 1985 - June 30, 1986, University Of Central Florida. College Of Engineering

Research Activities & Annual Reports

Annual report of research activities and publications of the College of Engineering, July 1, 1985 - June 30, 1986.

College Of Engineering Research Activities And Annual Report, July 1, 1985 - June 30, 1986, University Of Central Florida. College Of Engineering

Research Activities & Annual Reports

University of Central Florida College of Engineering research activities and annual report, July 1, 1985 - June 30, 1986.

The Planter - Bb1 Newspaper Clippings, University Of Central Florida

UCF Knights Racing Text

Newspaper clippings about UCF engineering students winning a Baja competition.

The Relative Efficiency Of Computer Controlled, Adaptive And Learner Centered Training On Transfer Of Training In A Computer Simulation Task, Lois-Ann Kuntz

Retrospective Theses and Dissertations

There is a need for effective cost efficient training programs. Individual differences have been shown to be the most important variable in many training programs and they should be paid special attention in the design of training programs. Compared in this experiment is computer-controlled (lockstep) training, adaptive training, and learner-centered training. Learner-centered and adaptive training are geared to the individual. Instead of lockstep training, learner-centered training allows the trainee to determine the amount or sequence of training at different levels of proficiency. Adaptive training is training based on the participant's performance. As the participant's performance improves he or she is …

Florida Macrolichens As Potential Bioindicators Of Environmental Quality: A Baseline Study, Harry V. Neal

Retrospective Theses and Dissertations

Lichens have been used extensively and with considerable success as bioindicators of atmospheric pollution in North America and Europe for more than thirty years. Little research has followed in tropical and subtropical regions where population growth is rapid and environmental pressures unprecedented. However, taxa used as bioindicators in other studies and/or taxa having this potential, occur naturally in Central Florida. A new potential major source of pollution, the coal-fired Curtis H. Stanton Energy Center, is about to begin operation providing the opportunity to determine the extent of impact. Therefore, lichen monitoring sites have been established and the collection of baseline …

Comparison Of The Situational Checklist Versus The Skill Checklist Assessment Center Exercise Reports Forms, Donna J. Gray

Retrospective Theses and Dissertations

No abstract provided.

The Interaction Effects Of Organizational Structure And Organizational Type On Managerial Job Satisfaction, Robert W. Adams

Retrospective Theses and Dissertations

No abstract provided.

Switched-Capacitor Programmable Sallen And Key Lowpass Filters, Karl P. Eriksson

Retrospective Theses and Dissertations

This thesis deals with a different approach to switched-capacitor filters than previously seen by the use of a Sallen and Key topology. It is shown that a Sallen and Key second-order topology approach to a switched-capacitor filter gives reasonable filter performance results, contrary to what the literature leads one to expect. It is also shown that the Sallen and Key second-order topology with modification to a third-order section with buffers results in a high performance switched-capacitor filter with fewer components than previous switched-capacitor filters. This results in fewer monolithic chip size requirements, reduced power requirements, and less cost. Higher order …

A Model For Vocal Fold Vibratory Motion, Contact Area, And The Electroglottogram, D. G. Childers, D. M. Hicks, G. P. Moore, Y. A. Alsaka

Faculty Bibliography 1980s

No abstract provided.

Rollins College Catalogue, 1986-1987, Rollins College

Text Materials of Central Florida

Rollins College catalogue 1986-1987 with list of faculty and students and courses by department.

Rollins College Winter Term 1986, Rollins College

Text Materials of Central Florida

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

College Recruitment: Compensation Preferences Of Seniors At The University Of Central Florida, Penny H. Faber

Retrospective Theses and Dissertations

The purpose of this study was to determine the compensation preferences of seniors at the University of Central Florida. The sample consisted of 86 females and 77 males currently registered as seniors at the university. Subjects were mailed a questionnaire and asked to rank order 11 compensation options and answer nine demographic questions. One-way and repeated measures analyses of variance were used to compute significant differences, 10 were found between groups in compensation preferences as related to the demographic variables. For example, those students with children had significant differences in preferences for four of the options. Significant differences in rankings …

Superior-Subordinate Perceptional Congruence Of Promotion Criteria Importance And Its Relationship To Job Satisfaction, Stacie L. Clark

Retrospective Theses and Dissertations

The degree of perceptual congruence of the importance of promotion criteria to superiors and subordinates was investigated. The relationship of congruence to job satisfaction was also evaluated. Fifty-two student workers and their superiors participated in the study. Perception of promotion criteria importance was measured through the rating of a list of promotion criteria using a seven point scale. An average discrepancy score of 7.925 was obtained between superiors' and subordinates' ratings indicating a significant degree of discrepancy, t(50) = 25.04, p< .001. Job satisfaction was measured using the Job Descriptive Index (JDI) and was correlated with the discrepancy scores. Perceptual congruence of promotion criteria was found to be significantly related to subordinates' satisfaction with supervision on the job, r = -.276, p < .05, and satisfaction with present pay, r = -.299, p < .05.

Stress, Exercise, Job Satisfaction And Performance: An Interactive Process Model, Monica Samanic

Retrospective Theses and Dissertations

Stress in organizations is a critical phenomenon of our times. Research to date has focused on specific job-related stressors such as role conflict, ambiguity and supervisory relationships utilizing satisfaction and performance as outcome variables. Results have often been ambiguous and non-conclusive. However, a variety of common physiological responses have been found to play a major role in stress reaction and management. Furthermore, numerous studies have demonstrated a moderating effect of exercise on physiological stress responses. This correlational study, based on a hypothetical Interactive Process Model of Stress Correlates, where fitness is the measure of stress, proposed to link stress-related variables …

Multiprocessor Scheduling With Practical Constraints, Kenneth Burton Donovan

Retrospective Theses and Dissertations

The problem of scheduling tasks onto multiprocessor systems has increasing practical importance as more applications are being addressed with multiprocessor systems. Actual applications and multiprocessor systems have many characteristics which become constraints to the general scheduling problem of minimizing the schedule length. These practical constraints include precedence relations and communication delays between tasks, yet few researchers have considered both these constraints when developing schedulers.

This work examines a more general multiprocessor scheduling problem, which includes these practical scheduling constraints, and develops a new scheduling heuristic using a list scheduler with dynamically computed priorities. The dynamic priority heuristic is compared against …

Matching Training Time To Training Need: A Procedure For Revising An Existing Supervisory Training Program, Eugene K. Cuccarese

Retrospective Theses and Dissertations

Measuring training need and in turn revising training content to reflect that need is a process that continues to plague the training practitioner. This study examines the application of Ford and Wroten's (1984) Matching Technique to a supervisory training program. Subjects were 13 non-supervisors and 13 recently promoted supervisors that were divided equally between the control and experimental conditions. A nonequivalent control group design was employed, and the data were analyzed using ANCOVA. Self-perception training need data were collected via a need survey. Both the need data and the training program content were classified in terms of management skill dimensions. …

Direct Digital Control Of A Liquid Level/Temperature Control Unit, Pedro J. Claudio

Retrospective Theses and Dissertations

A direct digital control algorithm was implemented on a liquid level and temperature control unit. Two control schemes were implemented on the system and the results were compared against a fourth order Runge-Kutta solution.

Both control schemes involved proportional feedback with dynamic adjustment of the operating point. It was found that the control scheme that contained a feedforward component which dealt with the inlet water temperature had a superior dynamic response to setpoint changes. Steady state offsets in both control schemes were attributable to model parameter estimation errors. Differences between the actual and predicted system dynamic response were also attributable …

A Peripheral Subsystem Optimized For Computer Image Generation Applications, John J. Bloomer

Retrospective Theses and Dissertations

Requirements for ever increasing realism in real time computer image generation for military mission and commercial training, have generated the need for a higher performance, more cost effective front-end processor. Current computer image generators front-end general purpose computers are reaching their performance limits in current architectures.

The tasks of this processor include: realtime computations, magnetic disk control, data transfer and direct memory access to and from the balance of the image generator. A new front-end processor system is under development. This multiple-bus, multiprocessor architecture in and of itself does not address disk and external data transfer. A peripheral subsystem is …

A Task Manager For A Multiprocessor Computer System, Peter J. Ingraham

Retrospective Theses and Dissertations

The advent of the 32-bit microprocessor has sparked the manufacture of a number of 32-bit single-board computers (SBCs). These SBCs rival [performance of minicomputers for a fraction of the cost, and a number of them conform to standard 32-bit bus structures. A 32-bit multiprocessor computer system can be created by connecting two or more SBCs on a 32-bit bus. This computer system has the potential of providing many times the power as a single-processor computer system as well as a significant reduction in cost.

The Multiprocessor Task Manager is designed to efficiently distribute software tasks, schedule their execution, and manage …

Design Of A Two-Layer, Capacitively Coupled, Microstrip Patch Antenna Element For Broadband Applications, Robert T. Cock

Retrospective Theses and Dissertations

A broadband, contiguous stacked, two-layer, square microstrip patch antenna element design is described which can be used for a linear or circular polarization. Single layer microstrip patch theory for the rectangular patch radiator is presented and used as a basis for understanding the two-layer patch configuration. The theory is modified to predict radiation patters and resonant frequencies of the two-layer microstrip patch antenna element. Experimental results include the radiation patterns, dominant resonant frequencies (TM₁₀ mode), return loss (S₁₁), and bandwidth for X band elements as a function of dielectric constants, dielectric thicknesses, and patch sizes.