Digital Commons Network^™

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.

Comparison Of The Narratives Vs. The Checklist Assessment Center Exercise Report Forms, James C. Rehmann

Retrospective Theses and Dissertations

No abstract provided.

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 …

Flow Injection And Photometric Determination Of S(Iv) In Rainwater With Pararosaniline, Frank A. Hedgecock

Retrospective Theses and Dissertations

The photometric pararosaniline (pRA) method for determination of S(IV) has been adapted to flow injection sample processing (FIA). Prominent features of the method include a limit of detection of 0.010 ppm of dissolved sulfur dioxide and a sampling rate of 20 per hour. The concentration range investigated was 0.010 to 0.200 ppm S0₂. Sequential samples were collected from two rainstorms and SO₂ concentrations were measured for 19 samples. The suppression of interference by Cr(III), Mn(II), and Fe(III) using 1,2-cyclohexylenedinitrilotetraacetic acid (CDTA) and ethylenediaminetetraacetic acid (EDTA) was investigated. A comparison of the adapted FIA method and its parent …

The Use Of Scheffe-Equivalent Equations To Predict Physical Properties Of Neoprene, Cheng Y. Loh

Retrospective Theses and Dissertations

The goal of this study is to find a more organized and directed approach to build models for mixture systems. An attempt is made to generate and then compare Scheffe (mixture) models with those generated by McGee using the ‘conventional’ method for neoprene data. The models are judged on their ability to predict physical properties of neoprene by comparing the following: predicted and actual values by inspection; the calculated % error of prediction; the squared multiple correlation coefficients; adjusted squared multiple correlation coefficients; the Fisher statistic and significance probability. Scheffe models do not have an intercept term and test statistics …

Ion Selective Electrodes Based On Aza- Substituted Crown Ethers, Lisa Ann Wellington

Retrospective Theses and Dissertations

A cation-responsive electrode system has been developed which incorporates aza-substituted crown ethers as ligands. In a novel application, uncomplexed crown ethers were used in the pelletized form for ionic transport. Electrodes have been produced which can be conditioned for a particular ion and following their use, be reconditioned and reused for other ions. Preparation method and lifetime studies are included.

The responses of two crown ethers with plasticizers were evaluated for thirteen representative cations. The concentration range covered in each evaluation was 1 x 10^-1 to 1 x 10^-7 M. For those ions exhibiting Nernstian or near-Nernstian response, …

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. …

Epsilon Precedence Grammars And Languages, Masoud T. Milani

Retrospective Theses and Dissertations

The classes of simple and weak precedence grammars are generalized to include ε-rules (productions with the empty right parts). The descriptive power of epsilon simple precedence (ESP) grammars increases directly with the number of ε-rules permitted; the class of ESP grammars with no ε-rules, ESP₀, is identical to the class of simple precedence grammars; ESP grammars with at most one ε-rule, ESP₁, define a class of languages which properly includes the class of ESP₀ languages, but is itself properly included in the class of deterministic, context-free languages. In general, ESP grammars having at most i …

New Synthetic Applications Of Enaminoketones, Timothy J. Buck

Retrospective Theses and Dissertations

This report discusses research concerning synthetic applications of enaminoketones. The work may be divided into four parts as follows: a) replacement of the dimethylamino group of certain enaminones by other amine groups through a simple procedure; b) formation of 3-alkyl-pyrazoles; c) formation of 2-amino-4-alkyl-pyrimidines; d) synthesis and subsequent reduction of iminium salts. The starting materials (E-1-(N,N-dimethylamino)-1-alkene-3-ones) have been condensed with hydrazine and guanidine to form pyrazoles and pyrimidines, respectively. The same starting materials have been reacted with POCl₃ in CH₂Cl₂ to produce chlorovinyliminium salts. These have then been reacted in situ with reducing agents to produce …

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 …

Cost Effective Design Of The Activated Sludge Wastewater Treatment System, Robert P. Huguenard

Retrospective Theses and Dissertations

In current design practice the components of the complete mix activated sludge system are designed as individual units with little or no appreciation for the process interactions which occur between system components. To achieve acceptable process efficiency and to realize cost effectiveness a unified design approach is necessary. This research effort was initiated to define the characteristics of the economic optimum complete mix activated sludge configuration while considering system interactions.

A computer program was developed for the completion of the process design and the economic analysis of the aeration basins, the settling basins, and the return sludge pumping facilities for …

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 …

Transient Critical Heat Flux, Kemal O. Pasamehmetoglu

Retrospective Theses and Dissertations

The term Critical Heat Flux (CHF) is used in boiling heat transfer to describe the local value of the heat flux at which a characteristic reduction in heat transfer coefficient first occurs. In today’s technology, the CHF is a phenomenon related to the design and safety of various important devices.

A major limitation on the thermal design of a light-water reactor (LWR) is the necessity to maintain an adequate safety margin between the CHF and the local heat flux. Extended operations at local power levels in excess of the CHF can lead to high temperature oxidation and embrittlement or melting …

High Speed Latchup-Free Cmos Using Tisi2, N-Well, Technology, Faheem Mohamedi

Retrospective Theses and Dissertations

This report discusses high speed latchup-free 0.5 µ m-channel CMOS using self-aligned TiSi₂ and deep-trench isolation n-well technology. This technology of deep-trench isolation combined with the epitaxial layer eliminates many problems such as poor device to device isolation, latchup susceptibility and relatively high sheet resistance of n+ and p+ diffusion layers. Thus CMOS devices operate at a propagation delay time of 140 p with a power dissipation of 1.5mW per inverter and attain a maximum clock frequency of 700 MHZ without suffering from latchup even at a latchup trigger current of 100 mA.

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 Considerations In The Development Of An Automated Cartographic System, Robert L. Holden

Retrospective Theses and Dissertations

Cartography, the art of producing maps, is an extremely tedious job which is prone to human error and requires many hours for the completion of maps and their digital data bases. Cartography is a classic example of a job that needs to be automated. Through the new advances in image processing and pattern recognition, the automation of this task is made possible with the cartographer acting as a supervisor. This paper reviews current cartographic techniques, and examines design considerations for a fully automated cartographic system. The benefits of such a system would be improvements in speed, flexibility, and accuracy. The …

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.

Computer Aided Supplement For Calculus Review, Gholam A. Shaykhian

Retrospective Theses and Dissertations

Several years ago an experimental re-entry program for women was initiated at the University of Central Florida. Women with B.S. degrees in Math or Science dating back 10 and 20 years ago were given a review course in Mathematics, primarily calculus, preparatory to subsequent courses in their M.S. programs of study. The complete course is available on tape and many students have viewed it since the course’s inception.

This project involved generation of software for testing the manipulative skills presented in the Calculus review. A skeleton format is presented which demonstrates all the features of the different programming modules being …

Data Structure Implementation And Investigation For A Prolog Language Interpreter, Hector Iurcovich

Retrospective Theses and Dissertations

A developmental Prolog language interpreter is constructed in the C programming language. The data type format is a subset of that of the Project Aquarius Prolog Engine proposed and under development at the University of California, Berkley. The design of the Prolog interpreter is part of an investigation at UCF in design of expert system architecture for real time applications. The interpreter facilities of data structure definition and manipulation are developed and applied. The list data structure is used as an example data structure. The scheme for representing structured data is based on the Lisp cons cell. Run-time generated lists …

Ground Penetrating Radar In The Detection Of Subsurface Cavities Related To Sinkhole Activity In Florida, Marianne Sweeney

Retrospective Theses and Dissertations

The Florida peninsula is underlain by limestone undergoing continuous solution process resulting in subsurface cavity formation. Increased land development has led to costly structural damage and water supply contamination due to surface subsidence and collapse in areas overlying such cavities. Conventional drilling methods cannot guarantee detection of isolated cavities. A geophysical technique known as ground penetrating radar (GPR) is a non-destructive method in geotechnical investigation capable of surveying large areas quickly and efficiently. GPR works as an echo sounder with a continuous similar graphic display. Cavities are identified by hyperbolic patterns caused by reflections from variations in electrical properties of …

Automated Q-Factor Measurement Via A Network Analyzer, Fadi E. Ayoub

Retrospective Theses and Dissertations

An algorithm is developed for the HP automated network analyzer that can determine the three basic parameters of microwave cavity resonators: the unloaded resonant frequency fo, the unloaded Q-factor Q_o, and the coupling coefficient β. The input reflection coefficient of the resonator is measured via the network analyzer, which is driven by an HP desk computer. The graphical techniques (Smith Chart) are replaced by the much faster calculations on the computer using numerical techniques. Stirling and Bessel’s formulas, in conjunction with the central difference interpolation method, are used to interpolate between sampled points to enhance the accuracy …

Synchronized On-Line Microprocessor Control Of Optical Disk Recorders And Players Using Realtime Interface Hardware/Software, William C. Reese

Retrospective Theses and Dissertations

The goal of this research report is to describe clearly the development of an operational software program which utilizes a realtime interface hardware unit to synchronously control an optical disc player and optical disc recorder via an external microprocessor. The previous UCF Engineering College’s optical disc hardware configuration consisted of a Panasonic optical disc player and recorder, color monitor, video camera, and PRO-350 to control only one device (player or recorder) at a time as the microprocessor has only one serial input/output (I/O) port. The Digital Equipment Corporation’s realtime interface device provides two serial I/O ports and therefore allows the …

Graphics Package For Portable Alphanumerical/Graphics Terminal, Elsie S. Loh

Retrospective Theses and Dissertations

This research report describes the design of a highlevel graphics package for use by application programmers t o display pictures of two-dimensional objects on a portable alphanumeric/graphic terminal. The design is implemented on the Digital VAX-11/780™ minicomputer running under the VMS operating system environment as the host computer and uses the DECwriter Correspondent (LA12) as the graphics device. The graphics package consists both the database manipulation software which is completely device dependent, and the interface software between the normal "drawing functions" and the hardware associated with a particular graphics device, which is minimally device-dependent.

Distribution Of Lead And Zinc In Groundwater Around An Exfiltration Pipe Including A Study Of Specific Conductance, Donna M. Schiffer

Retrospective Theses and Dissertations

Highway runoff is a significant source of nonpoint pollution to surfoce and ground waters. Underground disposal of stormwater has several advantages, such as recharge of ground water resources and reduction of flow rates at existing storm sewer outfa11s. However, there are few studies on the effects of underground disposal of stormwater on the qua1ity of ground water. The purpose of this stucty was to examine the changes 1n lead, zinc, and specific conductance in highway runoff that is routed to an underground disposal facility as the water passes through the unsaturated soil to the surficia1 aquifer. An exfiltration pipe in …

Snap, A Contract Pricing Tool For The Micro-Computer, Kris Luella Hoffman

Retrospective Theses and Dissertations

The amount of time required during the contracting process from the solicitation of bids through contract award can be significant. Two of the main problem areas are evaluating the contractor’s proposal and completing the negotiation process. The SNAP system was developed to simplify Negotiations with Automated Pricing using the microcomputer. SNAP can track three separate positions during negotiations and provide hour/dollar summaries for each of these positions by cost account, lot, department, and Work Breakdown Structure (WBS). Evaluation worksheets and department summaries can be produced to provide the evaluators with different perspectives of the same work effort. SNAP will also …

Multi-Computer Communication Network With Crossbar Switches, Massood. Towhidnejad

Retrospective Theses and Dissertations

This thesis describes the architecture and organization of a multi-computer communication network employing crossbar switches. The network is implemented using the Motorola EXORset development system. The network provides a flexible communication system capable of application to a wide range of data transfers. In this system each computer will perform its local tasks, in the meantime, each computer could send or receive messages to and from other computers in the network. The system logic has been partitioned into two basic board types: (a) communication interface, and (b) controller. The communication interface provides the interface of computers in the network to the …

Editor Design In The Context Of Control System Simulation, Leon Fadden

Retrospective Theses and Dissertations

Advances in microcomputer display devices and support software during the past decade have made the microcomputer an increasingly popular vehicle for technical education. This is especially apparent in the area of simulation. The pedagog can provide the student of control theory not merely with the block diagrams and differential algebra but with high resolution color graphic animations supported by mathematical models whose parameters are easily changed by some editor facility. This mode of control system design and behavior study is both faster and more enjoyable for the student, providing greater continuity, concentration, and learning efficiency.

This paper describes the simulation …

Corporate Burnout And Its Nonwork-Related Correlates, Kimberly J. Redmond

Retrospective Theses and Dissertations

Seventy-two employees working in an engineering firm completed a series of surveys assessing their level of job burnout, number of recent stressful life and work events experienced, level or aerobic fitness, and the degree to which each was overweight. A significant and positive relationship was found between the number of stressful work events experienced and job burnout. Multiple regression analysis showed that the number of stressful work events experienced, level of aerobic fitness, and percentage of pounds overweight jointly and significantly contributed to the relationship with job burnout. A discussion of these results and their implications for future research is …

A Shuttle Bus For The University Of Central Florida, Maryam Hosseini-Kargar

Retrospective Theses and Dissertations

The University of Central Florida, with an enrollment of approximately 16,000 students, is being faced with parking, traffic and transportation problems. The University of Central Florida (UCF) is a commuter campus, with over 90% of the students arriving by automobile. Parking spaces cost over $800/space, and funding to build new spaces is scarce. Existing lots on the perimeter of the UCF campus offer a potential advantage to park and ride services or a shuttle serve around UCF.

Research conducted for this paper evaluated the usage of a shuttle bus system around the UCF campus. The primary purpose of the shuttle …