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Articles 1 - 30 of 67
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The Fundamental Hardware Elements And Options Of Digital Signal Processing, Mark A. Hemmerlein
The Fundamental Hardware Elements And Options Of Digital Signal Processing, Mark A. Hemmerlein
Retrospective Theses and Dissertations
The hardware available for digital signal processing is evaluated. The elements required for implementation of digital signal processing applications are identified. These elements--memories, ALUs and multipliers -- are analyzed. Then the operation of parts which make up a range of possible solutions are evaluated. Thus, the graduating engineer is aided in making a transition from the theoretical to the practical world.
Solvents For Use In The Extractive Distillation Of Piperylene Concentrate, Abdulhadi Sagga
Solvents For Use In The Extractive Distillation Of Piperylene Concentrate, Abdulhadi Sagga
Retrospective Theses and Dissertations
This report describes an evaluation of the effectiveness of different solvents and solvent-organometallic compound mixtures for use in the extractive distillation of a piperylene mixture, consisting of five carbon olefins and diolefins obtained as a byproduct from an ethylene feedstock production plant. The most effective solvent is judged to be the one which gives the best separation of the lowest boiling and highest boiling points of the key components in the mixture. In this study twenty solvents and solvent mixtures were tested. Acetonitrile was found to be the most effective solvent and nitromethane the next most effective.
The Effects Of Personal And Organizational Variables On Union Membership And Instrumentality Perceptions, Carole E. Barclay
The Effects Of Personal And Organizational Variables On Union Membership And Instrumentality Perceptions, Carole E. Barclay
Retrospective Theses and Dissertations
No abstract provided.
Part I: The Synthesis Of New Potential Insecticides. Part Ii: New Aromatic Nucleophililic Subsitution Reactions, Fluoroalkoxylation And N,N-Dimethylamination, Cesar Colon
Retrospective Theses and Dissertations
A series of routes are described for the synthesis of new potential insecticides which are symmetrical or asymmetrical similogs of 2,5-Bis (dichloropheny1)-1,3,4-oxadiazole and its precursor diacyl hydrazine. Also two new aromatic nucleophilic substitution reactions are discussed. Activated aryl halides are reacted with fluorinated alkoxide anions. In all cases, substitution of the halogen by a fluoroalkoxy group was observed, and activated aryl halides are reacted with HMPA as an N, N-dimethyl aminating agent. In all cases, substitution of the halogen by a dimethyl amino group was observed. The effect of the activating group and the leaving group is described and a …
Understanding The Accident Process: Crisis Intervention For The Industrially Injured, Karen W. Sharpe
Understanding The Accident Process: Crisis Intervention For The Industrially Injured, Karen W. Sharpe
Retrospective Theses and Dissertations
Understanding the concept of the accident process plays a significant role in determining the course of treatment for the industrially injured. The accident process suggests that underlying psycho-social factors may result in the occurrence and/or maintenance of a state of disability. This disabled state provides greater needs satisfaction for the individual than his habitual behavioral repertoire. the development of the accident process suggests a state of crisis, either as a result of chronic difficulty or an acute reaction to sudden onset of illness or injury. Total rehabilitation of the individual is facilitated by a crisis intervention approach.
On The Theory And Experimental Results Of A Sensitive Fiber Optic Laser Accelerometer, Steven C. Furlong
On The Theory And Experimental Results Of A Sensitive Fiber Optic Laser Accelerometer, Steven C. Furlong
Retrospective Theses and Dissertations
No abstract provided.
Application Of Ground Penetrating Radar To The Detection Of Subsurface Cavities, Gary L. Kuhns
Application Of Ground Penetrating Radar To The Detection Of Subsurface Cavities, Gary L. Kuhns
Retrospective Theses and Dissertations
Ground Penetrating Radar (GPR) identifies subsurface features by distinguishing materials with different dielectric constants and electrical conductivities. Subsurface cavities can, therefore, be detected by the variation in their electrical properties from the electrical properties of the surrounding material. To test the cavity detection ability of GPR, subsurface cavities of varying size, shape and content were modeled. Radar response to the cavity models was found to be affected by the composition of the surrounding soil material, the depth of the groundwater table, and the radar signal frequency. Based on knowledge gained from the cavity modeling study, a natural subsurface cavity was …
Synthesis Of Potential Agrochemicals And Reactions Of Vinamidinium And Azavinamidinium Salts With Organometallic/Borane Reagents And Activated Nitrales, Charles N. Moorefield
Synthesis Of Potential Agrochemicals And Reactions Of Vinamidinium And Azavinamidinium Salts With Organometallic/Borane Reagents And Activated Nitrales, Charles N. Moorefield
Retrospective Theses and Dissertations
This report discusses research which was conducted in two areas: the synthesis of potential agrochemicals and the study of vinamidinium and azavinamidinium salt chemistry. Four classes of compounds were synthesized and characterized in the study of new potential agrochemicals. These compounds include diacylhydrazines, semicarbazides, 2,5-disubstituted-1,3,4-oxadiazoles and bis-2,5-disubstituted-1,3,4-oxadiazoles. The reaction of [3-(dimethylamino)-2-azaprop-2-en-1-ylidene] dimethylammonium chloride (Gold's reagent) with organometallic/borane reagents was examined in efforts to find convenient syntheses for N,N-dimethylamino substituted alkyl and aryl compounds. Additionally, the reaction of 1,5-diazapentadienium chloride (Nair's reagent) with nitrile activated alkanes was examined to find a convenient synthesis of 3-substituted pyridines. Subsequent intramolecular ring closure of …
Testing Of Active Feedback Applied To Piezoelectric Devices, William H. Barrow
Testing Of Active Feedback Applied To Piezoelectric Devices, William H. Barrow
Retrospective Theses and Dissertations
The purpose of this research is to test a unique implementation of active feedback applied to a low frequency piezoelectric transducer. Understanding that active feedback can be used to shape the frequency response of an electrical system a method for applying active electroacoustical feedback will be used to obtain a wider acoustical bandwidth in a piezoelectric transmitter. By applying active feedback to a resonant device its bandwidth was increased by a factor of 2.5. This is a significant improvement for applications where minimum electrical phase shift versus frequency is desired.
Digital Filtering With The Iapx 86/20, Robert E. Canright
Digital Filtering With The Iapx 86/20, Robert E. Canright
Retrospective Theses and Dissertations
The iAPX 86/20 (8086 with the 8087 numeric coprocessor) is considered for digital filtering. The advantage in using the iAPX 86/20 lies in the 80-bit width of the 8087 floating-point arithmetic-registers. With such large arithmetic registers, the effects of coefficient roundoff and arithmetic roundoff errors on the filter output are reduced. The price paid for the improved numerical performance is the increased time spent by the system moving data to and from memory. The method of Knowles and Olcayto for measuring the effect of coefficient roundoff is studies in detail. This method is applied to an example filter in order …
The Synthesis Of Potential Insecticides: Haloalkoxy Phenyl Diacylydrazines And 1,3,4-Oxadiazoles, Kathleen S. Gibbs-Rein
The Synthesis Of Potential Insecticides: Haloalkoxy Phenyl Diacylydrazines And 1,3,4-Oxadiazoles, Kathleen S. Gibbs-Rein
Retrospective Theses and Dissertations
The syntheses of two classes pf compounds, diacylhydrazines and 2,5-disubstituted 1,3,4-oxadiazoles, intended for subsequent investigation of pesticidal activity are discussed. The experimental conditions and procedures necessary for the preparation of these potential insecticides are also revealed. Finally, spectral data are interpreted and explained, and recommendations for further research are given.
Models For Economic Evaluation Of Flexible Manufacturing Systems, Daniel P. Salomon
Models For Economic Evaluation Of Flexible Manufacturing Systems, Daniel P. Salomon
Retrospective Theses and Dissertations
The current methods of economic justification are not suitable for identifying the benefits of automated manufacturing systems. This study is an introduction to Flexible Manufacturing Systems (FMS), its main features, and the economic benefits that can be expected. The models are designed to perform the following analyses: 1. Analysis of direct cost savings. 2. Analysis of the impact of incremental implementation on capital recovery costs. 3. Analysis of the cost effects of improving machine utilization and reducing manufacturing lead time. 4. Sensitivity analysis of the after-tax equivalent uniform annual cost of a FMS and a conventional system. The models are …
Design Of A Single User Deconcentrator For A Conferenced Voice Communication Circuit Switching System, Ming-Yung Wen
Design Of A Single User Deconcentrator For A Conferenced Voice Communication Circuit Switching System, Ming-Yung Wen
Retrospective Theses and Dissertations
A single user deconcentrator is designed for a circuit switched digital switching system which emphasizes mass conferencing. The switching system consists of distributed concentrators which include a first level of conferencing and a broadcast bus which includes a second level of conferencing. The deconcentrator features volume adjustment of individual conferences as well as a third and last level of conferencing- a conference of the individual conferences obtained from the broadcast bus. The design identifies the MSI and SSI components of the deconcentrator and provides an estimate of timing and board size. An alternative volume adjustment algorithm and the extension of …
Locus Of Control In Voluntary And Involuntary Psychiatric Patients, Christopher B. Karegeannes
Locus Of Control In Voluntary And Involuntary Psychiatric Patients, Christopher B. Karegeannes
Retrospective Theses and Dissertations
Psychiatric inpatients, consisting of 32 males and 33 females between the ages of 15 and 58 completed Rotter's (1966) Internal-External Locus of Control (I-E) Scale. The scale was administered individually to the patients at both admission and discharge, at the Crisis Stabilization Unit (CSU) in Orlando, Florida. Analysis of variance was used to determine whether there were significant differences due to commitment status (voluntary and involuntary), diagnosis (thought and affective and other disorders), and change scores (admission versus discharge). The hypothesis that involuntary patients would produce significantly higher scores was not confirmed. Further, no significant difference was found due to …
Feasibility Of Graywater Systems For The Florida Environment, Joseph L. Tessitore
Feasibility Of Graywater Systems For The Florida Environment, Joseph L. Tessitore
Retrospective Theses and Dissertations
The objectives of this report was to study the existing literature and data of residential graywater treatment and disposal systems and their possible applications and environmental impacts in Florida. The report addresses mainly (1) the definition of graywater quantity and quality, (2) the evaluation of proposed graywater treatment systems for possible reuse and disposal, (3) the impact of residential graywater systems on existing and proposed wastewater treatment plants, and (4) the possible impacts on groundwater and surface water environment. The report also presents some preliminary residential graywater treatment and disposal system designs including expected treatment efficiencies and cost. It should …
The Use Of Computer Vision To Close The Control Loop Of A Robot Arm, Randall S. Janka
The Use Of Computer Vision To Close The Control Loop Of A Robot Arm, Randall S. Janka
Retrospective Theses and Dissertations
Flexible automation is a partial solution to America's industrial and economic recovery and survivability. At the core of this manufacturing technology is the robot whose own flexibility is enhanced through the use of computer vision to close the control loop on the arm and also give the robot environmental intelligence. The basic subdivisions of a computer vision system are sensing, segmentation, description, recognition, and interpretation. When the vision processor analyzes a scene it can give the robot controller symbolic object information and object coordinates. The robot controller transforms such coordinates into its own reference frame through the use of homogeneous …
Three-Phase Unidirectional Surface Acoustic Wave Transducer Model And Computer Aided Design Implementation, Samuel M. Richie
Three-Phase Unidirectional Surface Acoustic Wave Transducer Model And Computer Aided Design Implementation, Samuel M. Richie
Retrospective Theses and Dissertations
This thesis presents an introduction into surface acoustics wave (SAW) unidirectional transducer (UDT) technologies and identifies advantages and disadvantages of various approaches. A complete model of the three-phase unidirectional structure is presented for the purpose of design analysis. This model incorporates the effects of the electrodes and transducer pattern along with the equivalent circuit model of the transducer structure. The model, when included with the appropriate peripheral components for transducer phasing and matching, can be used to determine accurately the frequency response of a given transducer structure. Such a model is well suited for implementation on a digital computer. With …
Food Supplementation Of Small Rodents In The Sand Pine Scrub, Brenda L. Young
Food Supplementation Of Small Rodents In The Sand Pine Scrub, Brenda L. Young
Retrospective Theses and Dissertations
No abstract provided.
Work And Leisure Attitudes Among Health Services Personnel, Robert C. Frink
Work And Leisure Attitudes Among Health Services Personnel, Robert C. Frink
Retrospective Theses and Dissertations
This study examines the relationship between work and leisure satisfaction using Shepard's Status Recognition Model. The sample was made up of two groups of health services personnel each of which contained three work levels or groups: a support group, a clinical group, and an administrative group. Assuming that status recognition would be different for the low status jobs (support) and high status jobs (clinical and administrative), it was hypothesized that the high status group would display low work related alienation and thus show a positive correlation between work and leisure satisfaction (evidence of a spillover mechanism). The lower status group …
Considerations Involved In Implementing Material Requirements Planning In A Government Contractor Firm, Susan B. Biberman
Considerations Involved In Implementing Material Requirements Planning In A Government Contractor Firm, Susan B. Biberman
Retrospective Theses and Dissertations
The government often imposes requirements on their contractors for the purpose of monitoring and control. Many government contractors utilize a matrix organization structure to help cope with the government's ever changing and challenging requirements. It is both the government requirements and this matrix organization which lead to the need for special information and features in a government contractor's manufacturing/material control system. This report specifically addresses those features which would be desirable in a government contractor's MRP system. These features involve the operation of the master schedule, the bill of material, the MRP software, the inventory files, purchasing, and shop floor …
Analysis Of Scheduling For Low Cost Part Task Trainers, William Fellows
Analysis Of Scheduling For Low Cost Part Task Trainers, William Fellows
Retrospective Theses and Dissertations
This study develops a methodology for the analysis of Part Task Trainer (PTT) refresh scheduling used in conjunction with large simulators. A human performance model is defined through the development of descriptive equations and system random variables. PTT scheduling calculations are performed by employing a computer program simulation. The computer algorithm generates a set of random vectors to represent the learning characteristics of a sample group of individual trainees. The relationships between simulator scheduling time, PTT frequency training, and model variables are demonstrated to be user interactive. This will allow the PTT refresh scheduling program to be used as an …
Pressure Drop Across A Tube Support Plate Of Trefoil Geometry Used In Steam Generator, Raad H. Bashar
Pressure Drop Across A Tube Support Plate Of Trefoil Geometry Used In Steam Generator, Raad H. Bashar
Retrospective Theses and Dissertations
This research is concerned with the presentation of pressure drop experimental results across a restriction of trefoil geometry (tube support plate) used in steam generators. The pressure drops were obtained for single-phase and two-phase of air, water, and their mixtures. The tests were performed at atmospheric conditions (pressure and temperature). The loss coefficients associated with these pressure drops were experimentally determined, and empirical correlations for the results were developed. The results were compared with previous studies done on other geometries with air-water mixtures, and also to a similar geometry with steam-water mixture.
A Mini Apple Network For Apple Ii Plus Computers, Michael E. Harnage
A Mini Apple Network For Apple Ii Plus Computers, Michael E. Harnage
Retrospective Theses and Dissertations
Computer networks have become increasingly popular over the last ten years. A simple low cost Mini Apple Network that uses Apple II plus computers and Apple's Parallel Interface Cards, is presented here. The Mini Apple Network is driven by PIC DRIVER, a software program that is able to transmit an Applesoft array variable from one computer to another. Three application programs are presented. A comparison is made of the gain in execution time when one, two, and three computers are used to solve the same problem, namely Laplace's partial differential equation. An increase in gain was obtained when the number …
The Design Of A Deep Ocean Hydrophone, Michael F. Hackathorn
The Design Of A Deep Ocean Hydrophone, Michael F. Hackathorn
Retrospective Theses and Dissertations
A design for a deep ocean hydrophone is proposed here. The hydrophone's sound sensing element is comprised of a capped end, piezoelectric cylinder. This sound sensing element is encased in an acoustic coupling fluid filled elastomeric boot. A small diameter tube communicates hydrostatic pressure from the coupling fluid to the interior of the sound sensing element for hydrostatic pressure compensation. The theoretical free field voltage sensitivity, the ratio of open circuit voltage to incident acoustic pressure, is predicted from mathematical model of the sound sensing element.
The Use Of Companding In Conferencing Voice Communications Systems, Jon P. Klages
The Use Of Companding In Conferencing Voice Communications Systems, Jon P. Klages
Retrospective Theses and Dissertations
Compounded codes are used for representing voice data in digital communication systems. This thesis addresses the use of the Mu-law companding algorithm in a system optimized for conferencing. A procedure for determining the degree of compression for a variable number of conferees and design equations for implementing a table-lookup scheme using read-only-memories are presented.
Interactive Computer Aided Design And Animation Of Spatial Mechanisms, Emmet B. Peter
Interactive Computer Aided Design And Animation Of Spatial Mechanisms, Emmet B. Peter
Retrospective Theses and Dissertations
The synthesis of planar and spatial mechanisms is often accomplished by either trial and error supplemented by computer analysis or by specific analytical techniques in the literature. In either case it is extremely helpful to be able to visualize a physical design as it emerges, and to see a graphic display of it in animated motion. This paper describes the development of a general interactive program for both analyzing and viewing a spatial 4-bar (RSSR) mechanism in animated motion. The analysis provides complete position, velocity, and acceleration information and, for the special case of the planar 4-bar, the same information …
The Adult Client's Conception Of Confidentiality In The Therapeutic Relationship, Philip O. Toal
The Adult Client's Conception Of Confidentiality In The Therapeutic Relationship, Philip O. Toal
Retrospective Theses and Dissertations
The adult client's conception of confidentiality in the therapeutic relationship and the valuing of this confidentiality was examined and defined in this paper. The importance of confidentiality and its effect on the therapeutic process was explored. Many professionals in the field of mental health believe that confidentiality is a critical factor in the successful outcome of therapy (Hayt, 1977; Lowenthal, 1968; Reynolds, 1976; Tancredi & Slady, 1975). It is viewed that confidentiality is expected by clients when entering into a therapeutic relationship, and is essential in the therapeutic process. The variables that may affect the client's conception of, attitudes toward, …
Comparison Of Hybrid Grass Carp And Grass Carp, Janine L. Callahan
Comparison Of Hybrid Grass Carp And Grass Carp, Janine L. Callahan
Retrospective Theses and Dissertations
The hybrid grass carp, a cross between the male bighead carp (Hypothalmichthys nobilis) and the female grass carp (Ctenopharyngodonidella), was first produced in the United States in 1979 for biocontrol purposes. Unlike the fish produced in 1979 and 1980, the hybrid grass carp spawned in 1981 were assumed to be uniform, triploid, and to have growth and feeding rates comparable to those of grass carp. A comparison study to determine differences in the morphology of the 1979, 1980, and 1981 hybrid grass carp revealed that the hybrid grass carp spawned in 1981 have a longer relative gut length, fewer deformities …
Aspects Of The Biology Of Aeromonas Hydrophilia With Respect To The Striped Mullet, Mugil Cephalus L. In The St. Johns River, Gerald E. Fensch
Aspects Of The Biology Of Aeromonas Hydrophilia With Respect To The Striped Mullet, Mugil Cephalus L. In The St. Johns River, Gerald E. Fensch
Retrospective Theses and Dissertations
The aspects of the biology of Aeromonas hydrophila with respect to a striped mullet (Mugil cephalus L.0 nursery were examined. A. hydrophila density in the natural water was found to be strongly correlated with turbidity and weakly correlated with water temperature. No correlations were found between A. hydrophila density and water depth, dissolved oxygen, pH, total alkalinity, specific conductivity, or phytoplankton chlorophyll concentration. A. hydrophila density/g dry weight of stomach content were found to be correlated with chlorophyll concentration/g dry weight stomach content. The survivability of striped mullet after capture was found to be primarily related to stress. Stressed striped …
Convective Heat Transfer From A Cylinder Rotating In Air, O. Kemal Pasamehmetoglu
Convective Heat Transfer From A Cylinder Rotating In Air, O. Kemal Pasamehmetoglu
Retrospective Theses and Dissertations
This study had a two-fold purpose. The initial emphasis was placed upon the analysis of heat transfer to ambient air from a rotating cylinder. Three distinct heat transfer regimes can be identified. For low rotational speeds corresponding to a Reynolds number less than the critical value for initiation of turbulence, the flow is laminar and the rotation has no effect on the average heat transfer coefficient. In the transition region, the heat transfer coefficient depends upon both natural convection and rotational effects. For higher rotational velocities, the flow is fully turbulent and rotational effects dominate. Previous analytical and experimental studies …