Digital Commons Network^™

Direct Sequence Spread Spectrum Communication Simulation System, Mark D. Patz

Retrospective Theses and Dissertations

The purpose of this work is to develop a fast, dynamic, and menu driven direct sequence spread spectrum communication simulation system for the Digital Equipment Corporation's VAX VMS line of computers. This software breaks the system down into two sections, the transmitter and the receiver. Each of the blocks that comprise the system is user definable in order to program the desired conditions. The input data and spreading data located within the transmitter are generated by a maximal length sequence generator, up to the tenth order. Encoding of the data is achieved by using an (n,k) cyclic code. A level …

A Pc-Based Simulation For Convolutional Codes Using Viterbi Decoding, Mark W. Rossman

Retrospective Theses and Dissertations

The objective of a digital communication system is to provide accurate transmission of information from one location to another. During transmission, the signal is subjected to noise and other distortions that compromise the integrity of the information. Channel encoding techniques can be employed to reduce this loss of integrity. One technique that has become popular in space and satellite communication systems is convolutional coding.

Channel encoding is only practical if it provides substantial improvement over the uncoded signal with a moderate hardware investment. The optimal approach to decoding convolutional codes is the Maximum-Likelihood method. This method compares the received data …

Amplification Of Video Signal Conditioner Circuit Design, Phuoc K. Nguyen

Retrospective Theses and Dissertations

Charge Injection Device (CID) has recently become a popular imaging device due to its versatility and high performance. The UCF's Electro-Optics Laboratory currently uses the TN 2505A, a General Electric solid state CID surveillance camera as an imager in an image processing system. The model offers two useful amplification techniques for video signal under low light condition: electronic gain boost and extended integration. This report describes the design and implementation of an external interface circuit that enables utilization of these two amplification techniques on the TN 2505A.

Single Element Controlled Oscillator, Miguel A. Muniz

Retrospective Theses and Dissertations

Oscillator circuits play an important role in the electronics world. The Single Resistance Controlled Oscillator (SRCO) consists of an active stage, a bridge tee feedback network and the control element. The oscillation frequency will change as the control element is adjusted because the point of maximum gain at zero phase shift has been changed. Furthermore, the amplitude should remain constant. In practice, however, it does not. An analysis of the SRCO indicates that the amplitude increase is due to the effect of the pole introduced by the operational amplifier. This paper introduces a compensation that extends the useful range of …

Design For Conversion Of Ucf's Supersonic Wind Tunnel To A Wind Tunnel With Hypersonic Capability, Huseyin S. Sivasligil

Retrospective Theses and Dissertations

A supersonic wind tunnel, currently in existence at the University of Central Florida in Orlando, Florida, is examined to determine feasibility for conversion to a wind tunnel with hypersonic capability. Computational data are presented, and the determination is made that the existing wind tunnel can be converted if alterations and additions are made. These changes include replacement of the existing two dimensional nozzle with a two dimensional nozzle specifically designed for operation at Mach number 7, and the addition of a vacuum tank and heater. The use of an axisymmetric nozzle design is recommended for conversion to Mach numbers higher …

Value Of Group Study Participation For Undergraduate Students, Sara Bennett-Loudermilk

Retrospective Theses and Dissertations

Cooperative learning in a university setting was explored. Undergraduate students enrolled in a physics course for nonmajors volunteered to participate in a group study program. After a baseline of two tests, volunteers were classified as "Leaders" (A-B average) or "Members" (C-F average). All volunteers received extra credit points for their participation. Records of group study attendance were kept, a questionnaire was distributed to participants, and grades were obtained from the instructor's roll. Multiple correlation/regression analyses showed that for Participant-Respondents: a) level of reported understanding was significantly related to perceived value of participation and b) session attendance was positively related to …

Dairy Calcium Advertising Awareness, Attitudes, And Behavior: A Survey Of 13-17 Year Old Females, Michele Cooper

Retrospective Theses and Dissertations

No abstract provided.

Computerized Flow Process Charting System And Applications, George H. Griffin

Retrospective Theses and Dissertations

A computerized flow process charting application program of dBase III+ has been developed to aid in resource requirements planning and operations analysis. Traditional flow process charting has used as the following data elements: assembly number, assembly sequence number, distance travelled, time required for the activity and an activity symbol. The computerized system adds several variables to these in order to customize the application at Martin Marietta Electronic Systems. These additional variables include work center identification, machine number identification, lot sizes, set up and run times and manufacturing specifications. Additionally, the circle or operations symbol has been expanded to differentiate between …

Initiation Of Sexual Behavior In The Marital Relationship, Nancy Roberts-Cruce

Retrospective Theses and Dissertations

While traditional beliefs and some research show that men have been more likely than women to initiate sexual activity, recent research indicates that traditional patterns of sexual initiation may be changing especially for married couples. Also, patterns of initiation seem to be related to sexual satisfaction. Specifically, women who always take the initiative and those who never do are the least satisfied with their sex lives. Conversely, those wives who initiate sex half the time are very happy with their sex lives. Since it appears that initiation of sexual activity is related to satisfaction with sex, information regarding why a …

The Relationship Between Selected Personality Variables And Compulsive Gamblers In Treatment, Kevin E. Kip

Retrospective Theses and Dissertations

The empirical contributions of researchers on the personality characteristics associated with the identification and treatment of compulsive gambling have been largely piecemeal. As an active four year veteran of the Gamblers Anonymous program, the author has come to recognize that the vast majority of members comprising Gamblers Anonymous are persons typically not well versed in experimental design or research methodology techniques. Compounding this statement is the fact that it was not until the early 1980's that compulsive gambling (or synonomously stated as pathological gambling) became recognized by the American Psychiatric Association as a mental disorder with explicit diagnostic signs and …

Comparison Of Performance Of Adolescent Hearing And Hearing-Impaired Children On Metalinguistic Tasks, Julia W. Reynolds

Retrospective Theses and Dissertations

Various researchers have viewed metalinguistics as the ability to consciously reflect upon language (Van Kleeck 1984a; Franklin 1979; Cazden 1975; Dale 1976). Prior to schooling, children use language as a means of functional communication through developing an interaction with the environment. They are aware of the content of their messages but not the language they are using to communicate their ideas. The emergence of language is developed primarily through concrete operations according to Van Kleeck (1984a). However, Allan (1982) states that when children enter school and begin to read, metalinguistics is emphasized and the language evolves from an unconscious, experimental …

Communication Training As Perceived By Training Personnel In Orlando, 1986, Kimberly C. Fleming

Retrospective Theses and Dissertations

No abstract provided.

Arachnid Fauna In Three Central Florida Plant Communities, David T. Corey

Retrospective Theses and Dissertations

Arachnids were collected in three plant communities on the University of Central Florida campus, beginning in May of 1983 and ending in March 1984. These sites were undisturbed communities: pond pine, sand pine scrub, and flatwoods. Pitfall traps and sweep nets were used to catch arachnids every other month.

A total of 2,657 arachnids were collected in pitfall traps and 4,022 in sweep nets. Spiders were the most numerous group, consisting of 87.5% of the individuals in pitfall traps and 100.0% in sweep nets. Forty-two scorpions, 41 pseudoscorpions, and 248 opilionids were captured on the ground surface.

Spider diversity on …

Operations Research In The High Tech Military Environment: A Survey, C. Steven Griffin

Retrospective Theses and Dissertations

The use of operations research as a technology to solve many of the problems of government and industry has become a major field of study within the very short span of the last fifty years. In the paper entitled, "Operations Research in the High Tech Military Environment: A Survey," the reader is provided with a better understanding of the tenets of operations research through an examination of a representative sample of the latest operations research applications developed for the high tech environment.

Initially, this involves providing the reader with some fundamental insights into what operations research is, what its practitioners …

Capacity Planning In A Discrete Item Manufacturing Environment, Ali M. Alsebaiee

Retrospective Theses and Dissertations

Capacity planning is a medium-to-long- term production planning tool that enables management to better understand how the demand of its customers have and will affect the available capacity planning. For a successful production and planning control system, management needs to consider the availability of not only the materials and component, but also the required manufacturing capacity. Several capacity planning techniques that deal with capacity planning in a discrete item manufacturing (job shop environment) are discussed in this report. These are Resource Requirement Planning, Rough Cut Capacity Planning, Capacity Requirement Planning, Operation Sequence, Input Output, and Simulation. A computerized capacity planning …

Sandspur, Vol 93, No 07, 1987, 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.

Fibergramme Vol.10 No. 5, Weavers Of Orlando

Text Materials of Central Florida

FIBERGRAMME is published in September, November, January, March and May.

The Strain Improvement Of Aspergillus Ficuum Nrrl 3135, Eric A. Utt

Retrospective Theses and Dissertations

A strain improvement program was initiated to increase the yield of extracellular phytase (EC 3.1.3.8) in Aspergillus ficuum NRRL 3135. A minimal plating medium containing 2.99 g liter^-1 a-ketoglutaric acid was developed to decrease and stabilized conidiogenesis time and facilitate the isolation of single colonies. Exposure of A. ficuum conidia to 0.5 mg ml^-1 N-methyl-N’-nitro-N-nitrosoguanidine (NTG) for 15 min at pH 6.5 caused a one log kill and an increase in the mutation rate of 800-fold. Treatment of A. ficuum conidia with 46 ergs mm^-2 sec ^-1 UV radiation for 30 sec resulted in a one …

Rollins College Winter Term 1987 Addendum, Rollins College

Text Materials of Central Florida

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

The Relationship Between The Individual's Educational And Professional Backgrounds And The 1985 Florida Merit Program, James Roger Dearing

Retrospective Theses and Dissertations

This research was designed to investigate whether there are any significant relationships between the individual's educational and professional backgrounds and the 1985 Florida Master Teacher Program. This study included information collected on 2,245 (72%) respondents out of 3,390 teachers who were selected as meritorious in Florida's 1985 program.

Two instruments were used in data collection. One was the set of Frame Factor Data which was obtained from the Merit Teachers' Summative Observation forms. The Frame Factor Data included: method of classroom presentation, number of students in the observed classes, number of students in upper and lower academic quartiles, number of …

Vasectomy: A Literature Review With Implications For Pre-Vasectomy Counseling, Annette Thrift Wing

Retrospective Theses and Dissertations

No abstract provided.

An Assessment Of Florida Community College Presidents' Acceptance Of Quality Indicators, George Cameron Barcus

Retrospective Theses and Dissertations

This report describes a study that was conducted to determine the perceived degree of usefulness the indicators of progress toward excellence have for the presidents of Florida's 28 community colleges. This study reports this degree of perceived usefulness by using a survey instrument that identified quality indicators developed by the State Board of Community Colleges, Florida Department of Education.

Based on a project design and format adapted by the Florida Community/Junior College Inter-Institutional Research Council, this study proposed to identify what information (indicators of progress toward excellence) is considered most valid to the presidents of Florida's community colleges in making …

Soap Opera Viewers' Perceptions Of The Real World, Gayle Seese

Retrospective Theses and Dissertations

The frequency of occurrence on typical soap operas of incidents such as homicide, infidelity, and mental breakdown is much greater than is the case in real life. Also, various occupations (e.g., medical profession, legal profession) are overrepresented in these programs. The present study investigated the extent to which heavy soap opera viewers are influenced by these representations. Specifically, the differences between long term soap opera viewers’ and non-soap opera viewers’ perceptions about people and events in the real world were investigated. The subjects’ perceptions of the frequency of occurrences in the general population of such events as divorce, extramarital affairs, …

Continuous Statistical Distribution Curve Fitting And Analysis Tool, Gerald Robie

Retrospective Theses and Dissertations

This paper reports on the implementation and utilization of a micro-computer based simulation modeling verification and validation tool. The interactive software tool, written in BASIC, computes and displays the frequency distribution of a given set of input data, computes appropriate parameters for a continuous statistical distribution which the user selects as likely to represent the population from which the input data sample was obtained, performs several goodness-of-fit analyses on the resultant distribution and provides sensitivity analysis capability on the input data, distribution type selection and distribution parameters.

Implementation Of A Parallel Ynet Architecture, Julie Nadeau Leblanc

Retrospective Theses and Dissertations

A simulation of an alternate implementation of a redundant busing network based on the Teradata Ynet architecture is presented. An overview of the Teradata DBC/1012 data base parallel processing computer including the Ynet, an active logic busing network, is given. Other multiprocessor busing networks are examined and compared to the standard Ynet and the alternate Ynet.

In the standard Ynet system, two networks, called Ynets, process message packets concurrently. When one of the Ynet paths fails, the system is reset. The remaining Ynet path restarts using the previously interrupted packets and processing continues without the aid of the failed Ynet. …

The Identification And Comparison Of Effective Merit Pay Factors By Central Florida Public School Educators, Richard K. Bommelje

Retrospective Theses and Dissertations

The purpose of this survey was to identify and compare the specific factors relating to merit pay that teachers, principals, and superintendents in Central Florida would accept in the development and implementation of a merit pay plan. A questionnaire, based on an instrument that was used in a previous study on merit pay factors in 1970, was developed that consisted of 38 factors. A five-point ordinal scale was used to measure the educators' degree of acceptance for each factor. There were 14 Central Florida school districts that participated in the survey including 433 teachers, 211 principals, and 12 superintendents. The …

Seasonal Variation In Serum Testosterone Of Immature Sea Turtles In Central Florida, Lawrence K. Luepschen

Retrospective Theses and Dissertations

A yearlong hormonal study of immature populations of loggerhead turtles (Caretta caretta) and green turtles (Chelonia mydas) inhabiting the Indian River in Central Florida, USA, provided information about the relationship between serum testosterone levels and life history habits. By use of a specific radioimmunoassay, testosterone levels of both species were found to remain constant throughout the year with only a slight increase in the warmer months. Adrenal production of steroids in response to stress does not contribute significantly to overall testosterone levels may be reduced for turtles held in captivity. Testosterone levels indicate that the sex ratios of both species …

Death Anxiety Among Older Adults As A Function Of The Christian Faith With Specific Reference To The Experience Of Being "Born Again", Wendy E. Holland

Retrospective Theses and Dissertations

Sixty male and female subjects between the ages of 60 to 84 years were administered three questionnaires concerning death anxiety, religiosity, and life satisfaction. Data were collected and analyzed by Pearson r correlation as well as by multiple regression analysis.

Findings included those subjects considering themselves to be "born again" Christians scored significantly lower on the death anxiety scale than did those respondents considering themselves Christian, but not "born again." Subjects considering themselves to be non-Christian/Other did not correlate significantly with death anxiety. Life satisfaction was not a significant predictor of death anxiety. Subjects indicating more conservative/fundamentalist denominational affiliations indicated …

Integration Of Computer Generated Images With Ntsc Video, Keith E. Lorenz

Retrospective Theses and Dissertations

From the growing field of computer graphics comes the need to combine the computer graphics with video from other sources. Combining video from separate sources creates a problem since both sources are synchronous to each other. The objective of this research report is to present a hardware design approach that will combine two asynchronous video sources to produce one video picture. The combining of two video sources is called “overlaying.” The hardware design described in this report will overlay video from a Digital Equipment Computer PRO-350 with the video from an RS-170 video source. The design approach presented includes system …

Experimental Verification Of Laser Speckle Power Spectral Density, Christopher T. Chiles

Retrospective Theses and Dissertations

The dependence of laser speckle power spectral density on the autocorrelation of the aperture pupil function was verified using a charge injection device (CID) camera. Speckle patterns acquired by the CID array were processed to compute the power spectral density (PSD). Three aperture shapes were studied. There was good agreement between the theoretical and experimental power spectral density shapes, and the cutoff frequencies agreed within five percent error.