Open Access. Powered by Scholars. Published by Universities.®
- Discipline
- Keyword
-
- Florida (5)
- Urban runoff (4)
- Piperylene (3)
- Water purification (3)
- Data processing (2)
-
- Labor unions (2)
- Laser communication systems (2)
- Little Lake Barton (2)
- Mathematics (2)
- Merritt Island National Wildlife Refuge (2)
- Optical communications (2)
- Ability -- Influence of age on (1)
- Active (1)
- Age and employment (1)
- Age discrimination (1)
- Alkenes (1)
- Aquatic weeds (1)
- Athletic ability (1)
- BILIN (1)
- Belief and doubt (1)
- Benthos (1)
- Boundary value problems (1)
- Bridges (1)
- Capital budget (1)
- Capital investments (1)
- Child rearing (1)
- Citrus oils (1)
- Coal economics (1)
- Collective bargaining -- College teachers (1)
- College students -- Transportation (1)
Articles 31 - 60 of 71
Full-Text Articles in Entire DC Network
Impact Of Highway Bridge Runoff On Adjacent Receiving Water Bodies, James E. Christopher
Impact Of Highway Bridge Runoff On Adjacent Receiving Water Bodies, James E. Christopher
Retrospective Theses and Dissertations
Two locations, Lake Ivanhoe and the Maitland interchange of Interstate 4, were selected to study the impact of bridge runoff on receiving water bodies. The Lake Ivanhoe location includes two similar bridges, one without scuppers and one with scuppers. The Maitland interchange site has several borr ponds which drain to Lake Lucien. Samples were collected from Lake Ivanhoe below the bridges and in the open lake away from the bridges. Also samples were collected from the east pond, west pond, and lake Lucien, at the Maitland interchange. Samples included water, sediments, plants and benthos to detect differences, if any, in …
Effects Of The Step Parent Education Program On Parenting Styles And Reported Child Behavior Problems, Patty H. Lee
Effects Of The Step Parent Education Program On Parenting Styles And Reported Child Behavior Problems, Patty H. Lee
Retrospective Theses and Dissertations
Three groups of parents were given a nine week parent education course using Dinkmeyer and McKay's Systematic Training for Effective Parenting. Three control groups were given no training. Pretest and posttest data were obtained from all six groups to test the hypotheses: Training with the STEP program will change parent attitudes toward a less authoritarian parenting style, and these changes will result in fewer problems reported by the parents in child behavior. Using Ernhart and Loevinger's Authoritarian Ideology Scale no significant differences in authoritarianism were found after training [F(1,5) = 2.45, p = .123]. Using McKay's Adlerian Parental Assessment of …
The Effect Of Race Of The Administrator And Requesting Categorical Demographic Data On Response Bias In A Group Administered Job Attitude Survey, Glenn Russell Weinger
The Effect Of Race Of The Administrator And Requesting Categorical Demographic Data On Response Bias In A Group Administered Job Attitude Survey, Glenn Russell Weinger
Retrospective Theses and Dissertations
No abstract provided.
The Separation Of Piperylene Concentrate By Extractive Distillation, Mary Jane Curnutte
The Separation Of Piperylene Concentrate By Extractive Distillation, Mary Jane Curnutte
Retrospective Theses and Dissertations
Piperylene concentrate, the five-carbon olefin and diolefin by-product of ethylene production, is being produced in increasing quantities as liquid feedstocks become more prevalent. At present, the concentrate is used primarily in resin production for the adhesives industry. Since this use is economically unattractive, a separation of the concentrate into pure compounds is industrially desirable. The evaluation of the effectiveness of several solvents for extractive distillation of piperylene concentrate was performed. This study resulted in the selection of acetonitrile as the most effective and most economical solvent investigated. Various distillation conditions were studied and optimization was based on these results.
Bilin: A Bilinear Transformation Computer Program And Its Applications, John Dana Greer
Bilin: A Bilinear Transformation Computer Program And Its Applications, John Dana Greer
Retrospective Theses and Dissertations
Given a transfer function for a differential equation model, an approach for obtaining a solution is by way of bilinear transformation. The bilinear transform approach is a numerical integration scheme which gives a discrete approximation to the differential equation solution. BILIN applies a series of polynomial transformations to the transfer function H(s). As a result, H(s) is mapped into the complex z plane obtaining the discrete transfer function H(z). From H(z), the difference equation is obtained whose solution y(nT) approximates the actual differential solution y(t). Hence, BILIN provides a means for obtaining discrete transfer functions for the design of digital …
Adaptation To Pregnancy As A Function Of Sex-Role, Anne Heidrich Diebel
Adaptation To Pregnancy As A Function Of Sex-Role, Anne Heidrich Diebel
Retrospective Theses and Dissertations
Forty-four pregnant women were examined to determine how individual differences in sex-role orientation, as assessed by the Bem Sex-Role Inventory, were related to continued sexual interest, activity, and satisfaction in pregnancy. Subjects were further examined to determine the effects of sex-role identity upon third trimester anxiety levels as assessed by the State-Trait Anxiety Inventory, upon physical experience of pregnancy, upon emotional response to pregnancy, and upon labor and delivery records. Subjects were examined periodically in the third trimester of pregnancy to determine current levels of functioning as well as to acquire retrospective prepregnancy and first and second trimester data. As …
A Parametric Study Of Economical Energy Usage In Freeze Tunnels, Marc A. Harrison
A Parametric Study Of Economical Energy Usage In Freeze Tunnels, Marc A. Harrison
Retrospective Theses and Dissertations
An investigation into economical energy usage in freeze tunnels was conducted. Freeze tunnels are commonly used in the food processing industry to freeze products, and in some cases may use large amounts of electricity. An actual freeze tunnel was observed and modeled on a computer. A parameter study was conducted. The results of the parameter study indicated the efficiency and energy costs in freeze tunnels may vary widely. Important parameters included the Nusselt number, air temperature, and the ratio of fan work divided by the useful refrigeration effect. Although no single set of optimum conditions were found, methods for improving …
Role Ambiguity, Role Conflict, Type A-B Behavior, Job Performance, And Psychosomatic Dysfunction, John Steven Mattone
Role Ambiguity, Role Conflict, Type A-B Behavior, Job Performance, And Psychosomatic Dysfunction, John Steven Mattone
Retrospective Theses and Dissertations
The main purpose of the present study was to determine empirically whether differences in perceived role conflict, role ambiguity, and Type A proclivities are associated with differences in perceived psychosomatic dysfunction. Moreover, an ancillary purpose of the present study was to determine whether differences in perceived job performance were associated with Type A-B tendencies and perceived role conflict and ambiguity. Data for 72 workers from all levels of two types of organizations (i.e., citizen protection and health) were obtained. All workers completed a role conflict and ambiguity measure, a 15-item self-report index of psychosomatic dysfunction, a 7-poimt measure of job …
English Language Proficiency As A Predictor Of Academic Performance For U.S. Navy Hispanic Recruits, Eduardo Alejandro Salas Garcia
English Language Proficiency As A Predictor Of Academic Performance For U.S. Navy Hispanic Recruits, Eduardo Alejandro Salas Garcia
Retrospective Theses and Dissertations
No abstract provided.
Attentiveness And Time Budget Of A Pair Of Nesting Wood Storks, E. Scott Clark
Attentiveness And Time Budget Of A Pair Of Nesting Wood Storks, E. Scott Clark
Retrospective Theses and Dissertations
An instantaneous sampling system was used to quantify nest attentiveness and time budget of a pair of Wood Storks (Mycteria americana) nesting at the Moore Creek colony on Merritt Island National Wildlife Refuge in 1977. The amount of time devoted to various activities during each stage of the 4-month reproductive cycle was examined and differences between stages evaluated. During the incubation period an adult was constantly at the nest site and the birds shared equally in the incubation duties. During the first four weeks of the 8-week pre-flight nestling stage, an adult was with the chicks continuously, although the adults …
The Comparative Effects Of Self-Evaluation And Self-Reinforcement Training In The Treatment Of Depression, David P. Tressler
The Comparative Effects Of Self-Evaluation And Self-Reinforcement Training In The Treatment Of Depression, David P. Tressler
Retrospective Theses and Dissertations
Rehm's self-control model of depression was evaluated by dismantling the self-control therapy into separate therapies based on self-monitoring plus self-evaluation and self-monitoring plus self-reinforcement training respectively. Seventeen volunteer female subjects selected on the basis of MMPI, Beck Depression Inventory and interview criteria were randomly assigned to the two conditions for six weekly therapy sessions. Results showed significant treatment effects on level of depression, overall pathology, behavioral ratings of verbal response levels and activity reinforcement potential. Separate comparisons of ratings of current functioning and performance criteria yielded significant effects on ratings of current functioning in favor of the self-monitoring plus self-reinforcement …
A Study On The Concentration Of Citrus Essential Oils By Adsorption, Albert Joseph Kruger
A Study On The Concentration Of Citrus Essential Oils By Adsorption, Albert Joseph Kruger
Retrospective Theses and Dissertations
Deterpenation by concentration of the flavor bearing oxygenated compounds present in Citrus Essential Oils using the column chromatographic method and the parameters affecting the adsorption of these oxygenated compounds at maximum economy versus reasonable efficiency in separation from the non-oxygenated compounds have been studied. Particular attention was given to the maximum number of adsorption-desorption-regeneration cycles that a single column charge could be subjected to before the adsorbent should be replaced. The results of this study suggested the following conditions are of importance with regard to the development of an efficient and economic operation: 1) deactivation of the silica gel column …
A Cavity Absorber For A Focusing Solar Collector, Andrew W. Crapo
A Cavity Absorber For A Focusing Solar Collector, Andrew W. Crapo
Retrospective Theses and Dissertations
The concept of a cavity absorber for use with a focusing parabolic trough is developed in this paper. A mathematical model is formulated and used to compare different absorber geometries. Limitations of the model are discussed and within the range of materials and fabrication methods available, the choice of a cylindrical cavity is substantiated. Relative sizes of the gap and cylinder are chosen for a given mirror arc length, focal length, and alignment error. The model is used to optimize these parameters and predict absorber and collector efficiency. The processes of building and testing the absorber are detailed, and test …
Optimum Monotonic Step Response Filters, Peter H. Halpern
Optimum Monotonic Step Response Filters, Peter H. Halpern
Retrospective Theses and Dissertations
The problem of designing sharp cutoff filters with monotonic step responses is addressed. The impulse responses of the filters are expanded in terms of finite duration trigonometric polynomials. The coefficients of the trigonometric polynomials are obtained, for arbitrary frequency penalty functions, by solving a generalized eigenvalue problem. Once the trigonometric polynomial is specified the network can be synthesized with known techniques. Two theorems which assist in the numerical solution are proven.
Population Ecology Of The Beach Mouse, Peromyscus Polionotus Niveiventris, Douglas Dale Extine
Population Ecology Of The Beach Mouse, Peromyscus Polionotus Niveiventris, Douglas Dale Extine
Retrospective Theses and Dissertations
No abstract provided.
Sector Energy Price And Demand In The State Of Florida, John G. Reed
Sector Energy Price And Demand In The State Of Florida, John G. Reed
Retrospective Theses and Dissertations
No abstract provided.
The Effects Of Exercise On Psychological Functioning, Deborah Ann Coe
The Effects Of Exercise On Psychological Functioning, Deborah Ann Coe
Retrospective Theses and Dissertations
No abstract provided.
The Effects Of Introducing Skewness Into Capital Rationing Decision Models, Edet Jonathan Ekere
The Effects Of Introducing Skewness Into Capital Rationing Decision Models, Edet Jonathan Ekere
Retrospective Theses and Dissertations
When investment projects are described by subjective probability distributions, the measure of investment worth becomes a difficult task. One of the basic assumptions underlying investment analysis under risk is that decision makers would base their decisions on only the first two statistical moments of the probability distribution of returns. However, the mean and variance can adequately describe only certain symmetric distributions such as the normal and the uniform distributions. As a result, if probability distributions of investment returns are actually asymmetric, the classic first two moments analysis ignores information (skewness) that is needed to make a better investment decision. Even …
Population Dynamics Of Small Mammals In Two Plant Communities Of The Merritt Island National Wildlife Refuge, Jeffrey A. Goldberg
Population Dynamics Of Small Mammals In Two Plant Communities Of The Merritt Island National Wildlife Refuge, Jeffrey A. Goldberg
Retrospective Theses and Dissertations
No abstract provided.
Speed Control Of Dc Shunt Motor For Electric Car Use, Mahmood Shahi
Speed Control Of Dc Shunt Motor For Electric Car Use, Mahmood Shahi
Retrospective Theses and Dissertations
This report describes the speed characteristic and various methods of speed control of DC shunt (separately excited) motors, especially for application in electrical vehicles. The basic behavior of the DC motor is discussed, along with traditional and modern techniques of speed control. As an example, a speed controller for a shunt motor (built and tested by the author) is discussed. Two types of speed controllers for electric cars are discussed, and the performance results for an experimental electric car are presented. Finally, a design for a 24 HP car motor controller using both armature and field control was simulated on …
Analysis Of Traffic Accidents At Daytona Beach In Volusia County, State Of Florida, Mohammad Reza Hajian
Analysis Of Traffic Accidents At Daytona Beach In Volusia County, State Of Florida, Mohammad Reza Hajian
Retrospective Theses and Dissertations
Anyone who has been tempted to cross a beach or walk along a beach is aware of the potential conflicts that can arise between pedestrians and vehicles. The competing use of the beach space results in conflicts between vehicles and pedestrians; many times the pedestrian's disregard for signed pedestrian safety provisions in the close vicinity and on the space allocated for car lanes results in avoidable conflicts. This report addresses the pedestrian and vehicle interaction at Daytona Beach in Volusia County of the State of Florida. This report has consolidated accident data for the period January 1, 1977 through July …
Noise Description And Noise Control At The Federal, State, And Local Level, Bobby L. Henning
Noise Description And Noise Control At The Federal, State, And Local Level, Bobby L. Henning
Retrospective Theses and Dissertations
Noise, that undesirable portion of the ever-present sounds of our environment, has until the last decade, been considered as an unavoidable by-product of our rapid population growth and its accompanying mechanization. As awareness of adverse health effects from noise exposure grew, the Federal government, as protector of the public health and welfare, took the initial steps to control noise pollution. Federal legislation, beginning with the Clean Air Amendments of 1970, has been promulgated to control major offenders and to assist State and local governments in their endeavors to provide the public with an environment free from harmful noise levels. This …
Electromagnetic Wave Scattering From A Rough Surface, Elie G. Nacouzi
Electromagnetic Wave Scattering From A Rough Surface, Elie G. Nacouzi
Retrospective Theses and Dissertations
This was a study to measure surface roughness using scattering of electromagnetic waves in the Ka and X microwave frequency bands. The detected fluctuations of the reflected field intensity is a measure of surface roughness. The reflected field intensity depends on the wavelength, the angle of incidence and the electrical properties of the media. Since the surface presents irregularities with randomly distributed facets, the characteristics of the rough-surface reflected wave can only be described by the statistical properties of the field intensity. The dependence of the normalized moments of the returned scatter on distance from the rough surface to the …
The Effects Of High Versus Low Amplitude Training Of 9-13 Hertz Eeg Activity On The Seizure Rate Of Refractory Epileptics, Bob Dubinsky
The Effects Of High Versus Low Amplitude Training Of 9-13 Hertz Eeg Activity On The Seizure Rate Of Refractory Epileptics, Bob Dubinsky
Retrospective Theses and Dissertations
No abstract provided.
Statistical Fading Of A Spherical Optical Wave In Atmospheric Turbulence, Lorraine M. Locke
Statistical Fading Of A Spherical Optical Wave In Atmospheric Turbulence, Lorraine M. Locke
Retrospective Theses and Dissertations
A formula for the average fade time of the intensity of a spherical optical wave travelling through atmospheric turbulence is developed. The model employed involves isotropic, homogeneous statistics using a lognormal distribution for the channel. The analysis is based on the fact that the logarithm of the irradiance is normally distributed and uses the work of S. O. Rice who developed such an expression for a zero mean, Gaussian process. The analysis employs the covariance function and the Taylor frozen turbulence hypothesis which results in an expression for the autocorrelation function.
An Investigation Into The Solution Of Three Dimensional Elastostatic Problems Using The Boundary Integral Technique, David Campbell Aldrich
An Investigation Into The Solution Of Three Dimensional Elastostatic Problems Using The Boundary Integral Technique, David Campbell Aldrich
Retrospective Theses and Dissertations
The boundary integral technique was implemented in a computer code for the general static analysis of three dimensional elastic solids. The was based on a formulation of the problem in which the governing boundary equation is developed from the known solution to Kelvin's problem, by the application of Betti's reciprocal relationship. Modeling the boundary of the region being analyzed with plane elements and assuming the tractions and displacements constant across these elements leads to a set of simultaneous algebraic equations approximating the boundary integral equation. Numerical techniques are used in the computer code to assemble and solve this set of …
Nominal Molecular Weight Distributions Of Color, Toc, Tthm, Precursors And Acid Strength In A Highly Organic Potable Water Source, Jalil Fouroozi
Nominal Molecular Weight Distributions Of Color, Toc, Tthm, Precursors And Acid Strength In A Highly Organic Potable Water Source, Jalil Fouroozi
Retrospective Theses and Dissertations
This research investigated the relationships between molecular size and the TOC, TTHM, acid strength and color concentrations present in raw and coagulated water from Lake Washington. Three separate coagulants were utilized for investigation. There were: Al, Fe and Mg. Results indicated that the majority of the TOC, color and TTHM precursors were in the colloidal size range and removed by coagulation. The remaining TTHM precursors are mostly molecular and require a process other than coagulation for removal from the potable water before environmental standards are met.
An Associative Backend Machine For Data Base Management, Alireza Hurson
An Associative Backend Machine For Data Base Management, Alireza Hurson
Retrospective Theses and Dissertations
It has long been recognized that computer systems containing large data bases expend an inordinate amount of time managing the resources (viz. central processing time, memory, ... etc.) rather than performing useful computation in response to user I s query. This is due to the adaptation of the classical machine architecture, the so called von Neumann architecture, to a problem domain that needs radically different machine architecture for an efficient solution. The characteristics that distinguish the computation for data base management systems are: massive amount of data, simple repetitive non-numeric operations and the association of a name space with the …
Perception Of Subordinates' Job Evaluation Factors To Determine Supervisor-Subordinate Agreement, George Edward Romot
Perception Of Subordinates' Job Evaluation Factors To Determine Supervisor-Subordinate Agreement, George Edward Romot
Retrospective Theses and Dissertations
No abstract provided.
Statistical Fading Of A Plane Optical Wave In Atmospheric Turbulence, John F. O'Hara
Statistical Fading Of A Plane Optical Wave In Atmospheric Turbulence, John F. O'Hara
Retrospective Theses and Dissertations
A formula for the average fade time of the intensity of a plane optical wave traveling through atmospheric turbulence is developed. The model employed involves isotropic, homogeneous statistics using a lognormal distribution for the channel. The analysis is based on the fact that the logarithm of the irradiance is normally distributed and uses the work of S. O. Rice who developed such an expression for a zero mean, Gaussian process. The analysis employs the covariance function and the Taylor frozen turbulence hypothesis which results in an expression for the autocorrelation function.