Digital Commons Network^™

Design Of A Bandpass Oculometer, Karin Brandauer

Retrospective Theses and Dissertations

A passive oculometer is a device that measures the position of the eye by utilizing the corneo-retinal potential (CRP) generated by the eye. In this thesis, the Bandpass Oculometer replaces the joystick of a personal computer, allowing the viewer to use a computer simply by moving his eyes. Low frequency noise, present in all electronic circuits, produces an offset from the reference point, the center of the screen. In previous lowpass oculometry studies at University of Central Florida, this offset caused the cursor to drift toward the edge of the field of view within a period of 30 seconds, decreasing …

Survey Of Local Area Networks For Low End Systems, Wipawadee P. Sonprasit

Retrospective Theses and Dissertations

Local area networks (LANs) that support small systems, the personal computers in particular, are surveyed. LAN environments, factors motivating interest in PC LANs, and capability requirements of LANs posed by low-end systems users, are outlined. Discussion of LAN technology includes standards, architecture, transmission media, topology, transmission techniques, access protocol, and performance factors topics. Commercial products are presented with more in-depth outline on selected products. Observation and future of PC LANs conclude the survey.

Design Of A Systolic Architecture To Implement Graphic Transforms, Aimee A. Murray

Retrospective Theses and Dissertations

The graphics generator hardware is an important component of flight-training simulators. The function of this hardware is to generate 3D perspective images at rates of 30 frames per second to produce realistic out-ofwindow scenes viewed by the crew under training. Within most graphics generator hardware are array processors which achieve high computation throughput necessary to generate real-time processing. The function of the array processors is to transform, clip, rotate and perspective project the data base into screen coordinates for use by the graphic generator. A FIMD (few instructions multiple data) systolic architecture is proposed to achieve high computational throughput that …

Computer Aided Design Of Linear Phase Finite Impulse Response Digital Filters, Wentao Lyou

Retrospective Theses and Dissertations

This research report is an investigation of techniques for designing linear phase finite-duration impulse response (FIR) filters. The software package, CADFIR, developed for this project can be used to design linear phase FIR digital filters via three well-known design techniques: the window method, the frequency sampling method, and the optimal filter design method. CADFIR has options for designing such standard filters as lowpass, highpass, bandpass, and bandstop filters as well as multipassband-stopband filters. The fundamental properties of FIR filters are discussed and design algorithms associated with the three FIR filter design techniques are developed. Design examples are included and the …

Dynamic Performance-Based Student Model For An Intelligent Simulation Training System, Jenifer M. Sargeant

Retrospective Theses and Dissertations

Student modeling has been the subject of research since the mid-1970's. A student model is an evolving description of what the student knows about the subject domain. Much of the previous research has concentrated on evaluating a student in performing cognitive tasks. The Intelligent Simulation Training System (ISTS) applies the techniques of Artificial Intelligence, Intelligent Tutoring Systems and Expert Systems to simulation-based training. The ISTS Student Model is unique in that it evaluates the student in performance-based tasks. It monitors and records the student's ability to maintain relationships between objects in space and time. The scope of this research was …

A Comparison Of Two Microcomputer Continuous Simulation Languages, Amy Brannon Kirkland

Retrospective Theses and Dissertations

Until the early 1980s, most digital simulation models of reasonably complex systems required the use of a mainframe for a solution to be obtained in a timely manner. Recently, the declining prices of computer memory, operating systems, and modern hardware have supported the implementation of large simulation packages on smaller machines. Today, tremendous improvements in the performance of microcomputers have provided the simulationist with a completely personalized, less expensive computing environment. Operating within a microcomputer environment, the simulationist must choose a suitable computer language. Often, user familiarity dictates the selection of a language, while other factors such as ease of …

Comparison Of Graphical Design Methodologies, Pamela Stark Woodard

Retrospective Theses and Dissertations

The recent development of the Ada language by the Department of Defense and its required use within the Department of Defense for the development of embedded software systems has resulted in a need for better methods to represent Ada software designs. Graphical design techniques have long been used as software design and documentation aids. The use of graphical techniques to illustrate an Ada design can provide a clear, concise means to describe a complex software system. The purpose of this paper is to investigate several software design methodologies which incorporate graphical design notations. The specific software methodologies examined in detail …

Numerical Analysis Of The Resonant States Of Quantum Wells And Superlattice Devices, Alan Gilbert Whittaker

Retrospective Theses and Dissertations

This thesis is concerned with the development of a numerical model to describe the resonant states associated with quantum well and superlattice devices. A numerical method is described where the time-independent Schrodinger equation is represented as a series of simultaneous algebraic equations using the finite-element method. The eigenvalues for these equations are then found using a Sturm sequence, and the eigenfunctions subsequently calculated using a reverse iteration method containing orthogonality constraints. Simulations of specific devices are presented and compared with experimental results and good correlation is observed.

The Composing Process And Speech Communication An Examination Of The Strategies Of Six Successful Student Speakers, Susan M. Andersen

Retrospective Theses and Dissertations

Speech is a process, yet studies in human communication generally examine speech as a product. Rather than studying the decisions employed in the construction and reception of messages, most research in speech focuses upon evaluating communication products. This study represents an effort to build communication theory within a different paradigmatic perspective, employing ethnographic interview method for the purpose of generating theory.

The purpose of this study was to examine the composing processes of six successful student speakers as they prepared formal public speeches. The specific strategies and methods employed were found to vary among these students and to deviate significantly …

Operational Analysis Of Duties Of Florida Elementary School Secretary As Perceived By Secretaries, Principals And Teachers, James Lynwood Mosley

Retrospective Theses and Dissertations

Information was collected from principals, secretaries and teachers regarding their perceptions of the elementary schoo l secretary's role. Participants· were from three central Florida counties. The instrument for data collection was a survey form consisting of secretarial duties/responsibilities/attributes gleaned from a variety of sources. Participants' perceptions were tallied by means of a modified Li kert Scale. Tallied responses were analyzed statistically in comparison to six null hypotheses which were proposed. Three statistical procedures were employed in the data analysis. These procedures consisted of: (1) analysis of variance, (2) chi-square goodness of fit, and (3) Pearson Product Moment correlation. The .05 …

An Evaluation Of Art Teacher, Parent And Student Perceptions Of The Most Meritorious Goals For A High School Art Program, Clare E. Loveridge

Retrospective Theses and Dissertations

The purpose of this study was to examine and evaluate the perceptions of high school art teachers, parents of high school students and high school students themselves relative to the merits of goals of a district program for high school art education and to determine whether the three populations share a common perception of these goals.

The reveiew of the literature indicated a lack of substantive art programs in the curriculum from kindergarten through grade 12. The emphasis on art productino goals was cited as a major reason art is given such low status in our nation's schools. Many authors …

Investigative Study Of The Reliability Of A Rotating Turbine Blade, William Stuart Beal

Retrospective Theses and Dissertations

-Turbine blading incidents are a concern to electrical utilities since they can result in power plant unavailability. The reliability of a particular turbine blade is investigated in this report to determine if it can be replaced with a more reliable blade design. The majority of incidents concerning this blade have been attributed to stall flutter vibration that has been the result of unit operation at low load levels with high back-pressures in the steam condenser. Stall flutter can be avoided by limiting back-pressure levels during low load operation and is thus not a concern here. Another potential cause of unreliability …

An Overview Of Machine Vision, Juan C. Telchi

Retrospective Theses and Dissertations

The objective of this paper is to examine new ideas and other useful information on the most recent advances in the robotic vision field. A visual system model was introduced and the basic components of this model were explained. The principal areas in robotic vision were researched. This included two dimension and three dimension vision sensors. Industrial applications and future developments of machine vision systems were addressed. A survey was done to summarize the vision system market and the robot market share worldwide.

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 …

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 …

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.

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., …

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 …

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.

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

Retrospective Theses and Dissertations

No abstract provided.