Digital Commons Network^™

Human Factors Compatibility Concerns In The Selection Of Display Technologies For Computer And Data Terminals, Francis C. Westerfield

Retrospective Theses and Dissertations

Human factors considerations are often overlooked in the selection of electronic computer displays. When cost is used as the only determining factor, the resulting product may not be commercially successful because of an inadequate display.

To help avoid this situation, designers and users should be aware of the various factors involved in proper display selection. These factors were developed by a synthesis of existing scientific and industrial literature on the subject and are explained in this paper.

The first factor is a basic knowledge of the structure, characteristics, and function of the human visual system. The theory of sight, anatomy …

An Experimental And Theoretical Analysis Of A Laser Beam Propagating Through Multiple Phase Screens, Arthur R. Weeks

Retrospective Theses and Dissertations

An experimental and a theoretical analysis for a laser beam propagating through multiple phase screens was performed. The theoretical analysis showed that the statistics for the intensity fluctuations, which can be predicted by the HK and the I-K distributions, could be derived from a multiplicative process using statistical distributions derived from Gaussian statistics. For the single phase screen experiment, the experimental normalized moments were compared with the normalized moments of both the HK and I-K distributions . In addition, the intensity data was lowpass filtered to yield moments that are predicted by the gamma distribution. The single phase screen data …

A Study Of Self-Perceived Current And Desired Career Stages Of Federal Government Engineers And Public School Educators In The Central Florida Area, Dennis Stephan Duke

Retrospective Theses and Dissertations

This study investigated the perceptions of public school educators and Federal Government engineers in the Central Florida area to determine their self-perceived current and desired career stages (Dalton, Thompson and Price, 1977). The influences of age, education and tenure variables on these perceptions and on the employee's preference for a technical or managerial career track were also examined. The rationale for the study is based upon findings in the literature which indicate that both occupations are experiencing motivation and retention problems caused by the requirement to leave classrooms or technical engineering positions and enter management ranks in order to gain …

The Nonpromotion Message's Affective Impact On Parents, Sandra Kaye Daves

Retrospective Theses and Dissertations

This study was conducted to investigate the nonpromotion message's affective impact on parents. An interview guide was developed to collect data on parents' reactions to several aspects of public schools: Elementary schools in general; Messages received from elementary schools; Current practices (nonpromotion) in schools; Parents' feelings as a result of their child being retained; Information about their family. Interviews were conducted with parents of 180 children who attended public schools. Ninety interviews were conducted with parents of children who had been retained in either second, third or fifth grade and 90 were conducted with parents of children who had been …

The Design Of A Processing Element For The Systolic Array Implementation Of A Kalman Filter, John P. Condorodis

Retrospective Theses and Dissertations

The Kalman filter is an important component of optimal estimation theory. It has applications in a wide range of high performance control systems including navigational, fire control, and targeting systems. The Kalman filter, however, has not been utilized to its full potential due to the limitations of its inherent computational intensiveness which requires "off-line" processing or allows only low bandwidth real-time applications.

The recent advances in VLSI circuit technology have created the opportunity to design algorithms and data structures for direct implementation in integrated circuits. A systolic architecture is a concept which allows the construction of massively parallel systems in …

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 …

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

Retrospective Theses and Dissertations

No abstract provided.

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.

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 …

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.

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, …

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 …

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.

Fibergramme Vol.11 No. 1, Weavers Of Orlando

Text Materials of Central Florida

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

Fibergramme Vol.11 No. 2, Weavers Of Orlando

Text Materials of Central Florida

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

Compensation For Gain Nonuniformity And Nonlinearity In Hgcdte Infrared Charge-Coupled-Device Focal Planes, Glenn D. Boreman, Christopher Costanzo

Faculty Bibliography 1980s

Infrared CCD arrays generally require a compensation for the effect of gain and offset variation among the individual detectors of the array. Linear compensation techniques do not suffice for focal planes that exhibit a large nonlinearity of response combined with order-of-magnitude variations in threshold and saturation flux levels. This situation is common among hybrid architecture CCDs, particularly when HgCdTe is the detector material. This paper reports on a multipoint piecewise-linear correction scheme employed on a HgCdTe infrared CCD focal plane. This technique allows a compensated response to be obtained in a computationally efficient manner. An experimental relationship between the number …

Crummer Graduate School, Rollins College

Text Materials of Central Florida

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

Rollins College Catalogue, 1987-1988, Rollins College

Text Materials of Central Florida

Rollins College catalogue 1987-1988 with list of faculty and students and courses by department.

Rollins College Winter Term 1987, Rollins College

Text Materials of Central Florida

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

Strong Correlation And Alignment Near The Be 1s Photoionization Threshold, Manfred O. Krause, C. Denise Caldwell

Faculty Bibliography 1980s

Photoionization in atomic beryllium has been studied in detail near the 1 s threshold. Multiple excitation to the 1 s ( 2 s 2 p 1 , 3 P ) states, i.e., conjugate shakeup, is found to be unusually strong, 40% of single excitation. The 3 P component rapidly loses strength with increasing photon energy, while the 1 P component persists. The 1 s 2 s 2 p states are highly aligned, as shown by the Auger-electron angular distribution. The A 2 value of -0.65 implies a d -wave contribution of 0.39. Our results indicate that resonances reported for the …

Maximum Entropy Reconstruction Of Moment Coded Images, Nicolaos S. Tzannes, Peter A. Jonnard

Faculty Bibliography 1980s

The maximum entropy principle (MEP) is applied to the problem of reconstructing an image from knowledge of a finite set of its moments. This new approach is compared to the existing method of moments approach and is shown to have a clear edge in performance in all of the applications attempted. Compression ratios more than twice as high as those previously achieved are possible with the new MEP method.

The Slicing Extent Technique For Fast Ray Tracing, Sudhanshu Kumar Semwal

Retrospective Theses and Dissertations

A new technique for image generation using ray tracing is introduced. The “Slicing Extent Technique” (SET) partitions object space with slicing planes perpendicular to all three axes. Planes are divided into two dimensional rectangular cells, which contain pointers to nearby objects. Cell size and the space between slices varies, and is determined by the objects’ locations and orientations. Unlike oct-tree and other space-partitioning methods, SET is not primarily concerned with dividing space into mutually exclusive volume elements (‘voxels’) and identifying objects within each voxel. Instead, SET is based on analysis of projections of objects onto slicing planes. In comparison to …

Person Perception And The Employment Interview: The Impact Of Facial Features In The Employee Selection Process, Susan C. Muller

Retrospective Theses and Dissertations

Previous research has found that the structural makeup of the face influences the manner by which individuals perceive others and attribute characteristics to them. In addition, support has been provided for the hypothesis that nonverbal cues significantly influence an interviewer's perception of a job candidate and the pending hiring decision. Taken together, this study hypothesized that the nonverbal cues emitted from the structural makeup of the face would impact the decision to hire and the perceptions of the job applicant's personality. It was also expected that variations in facial structure would influence an employer's decision in hiring the applicant for …

Design And Performance Analysis Of A Relational Replicated Database Systems, Jon Gregory Hanson

Retrospective Theses and Dissertations

The hardware organization and software structure of a new database system are presented. This system, the relational replicated database system (RRDS), is based on a set of replicated processors operating on a partitioned database. Performance improvements and capacity growth can be obtained by adding more processors to the configuration. Based on designing goals a set of hardware and software design questions were developed. The system then evolved according to a five-phase process, based on simulation and analysis, which addressed and resolved the design questions. Strategies and algorithms were developed for data access, data placement, and directory management for the hardware …