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The Effects Of Dredged Materials On The Copeod, Acartia Tonsa, Renee Suzanne Crouch

Biological Sciences Theses & Dissertations

A study was conducted to determine the potential impact of open ocean disposal of sediments dredged from a highly industrialized seaport. Sediments from three potential dredge sites along the Southern Branch of the Elizabeth River, Hampton Roads, Virginia were evaluated for acute toxicity. The suspended particulate fractions of dredged materials were tested in a series of 96-hour, static bioassays using the calanoid copepod, Acartia tonsa Dana. Significant mortalities were observed for all three sites with the sediments from the most heavily industrialized site producing immediate and severe mortality. Analysis of results indicates that mortality was highly related to the volatile …

In Favor Of Capital Punishment: A Blending Of Philosophical Perspectives, James Charles Donnelly

Institute for the Humanities Theses

There has been little intellectual support for the average American's view of the proper relationship between L' crime and punishment. This text is an effort to philosophically define and defend this view. Chapters one and two deal with teleological theories and justification for systems and rules of practices. I first discuss the historical relationship of man to the state, showing the necessity of and providing a basis for civil authority and law and showing both to be based on social utility. This accomplished, a teleological justification of a system of punishment is presented. Chapter three discusses retribution as the deontological …

High Resolution Two Dimensional Electrophoresis Of Soluble Proteins In Human Spermatozoa, Hsing-Ying Liu

Chemistry & Biochemistry Theses & Dissertations

The evaluation of human semen is very important for diagnosis of male infertility. Combined with the analysis of seminal plasma, a comprehensive biochemical screening of human spermatozoan proteins may be of assistance in providing qualitative and quantitative information to the physician to assist with evaluation.

In this study, human spermatozoa were ruptured by sonication. The soluble spermatozoan proteins were separated from the cellular debris by centrifugation and then analyzed in dissociated forms by two dimensional electrophoresis. The separated proteins were visualized by a silver stain method.

It has been shown that these combined techniques can resolve- four to five hundred …

A Comparative Study Between A Readiness Measure And An Achievement Test As Measured By The Metropolitan Readiness Test And The Science Research Associates Achievement Series, Linda L. Ditchburn

Educational Leadership & Workforce Development Theses & Dissertations

The objective of this research was to complete an experimental study which would investigate the nature of the relationship between readiness and achievement. Data collection included two components: scores from the Metropolitan Readiness Test (MRT), administered at the kindergarten level; and scores from the Science Research Associates (SRA) Achievement Series, administered to the same 284 subjects at the fourth grade level. Correlation coefficients between these two tests were determined for all subtests, total tests, composites, and the Educational Ability Series. Since correlation coefficients between the MRT and the SRA evidenced significantly positive relation­ ships, the implication is clear that performance …

The Effect Of Crowding On Growth Of The Cichlid Fish, Oreochromis Mossambicus, Bonnie A. Barrows

OES Theses and Dissertations

It has been reported that the Java tilapia, Oreochromis mossambicus, displays hypersensitivity to a substance it produces when biomass levels in a flow-through culture system exceed 20 g/1, resulting in reduced growth and high mortality. Experiments on the growth of this species in small tanks were conducted in order to determine whether O. mossambicus produces a growth-inhibiting compound under crowded conditions. This species was successfully maintained at biomass levels of 38 g/1 and 57 g/1 with a total mortality of only 4.5%.

The Java tilapia can grow rapidly in small aquaria, as indicated by the data taken during Experiment …

Experiments Conducted On The Electron Beam Produced By A Dense Plasma Focus, Mark Steven Pronko

Electrical & Computer Engineering Theses & Dissertations

An experimental investigation was conducted using a 34-kJ Dense Plasma Focus (DPF) in which the possible enhancement of the electron beam was addressed. Electron beams ejected from the DPF have been observed to exceed 30 kA with pulse durations of a few nanoseconds. Enhancement was considered to be either an increase in the probability that the peak beam current exceeded some lower limit, or an increase in the mean energy of the beam electrons. The investigation was divided into two parts, each addressing one of the aspects of enhancement.

In the first part of the investigation, an axial magnetic field …

Treatment Process Optimization At The Lee Hall Water Treatment Plant Newport News, Virginia, Marcy Granum Garnett

Civil & Environmental Engineering Theses & Dissertations

Various methods can be used in operating a water treatment plant. It is desirable to produce good quality water as efficiently and economically as possible. This study evaluates each phase of operation at the Newport News (Lee Hall} water treatment plant for overall efficiency.

This study begins by giving a detailed description of the Lee Hall water treatment plant. The description includes sources of water, a description of each treatment process, a plan view of the treatment plant, and a flow diagram of the treatment plant.

Based on the raw water data, flow rates, and the treatment plant characteristics, the …

Stress Appraisals And Performance In An Academic Setting, Michele Terranova

Psychology Theses & Dissertations

Stressful appraisals and performance were measured in an achievement-oriented setting. The coping disposition of sensitization, locus of control, and specific attribution for control were expected to influence both the stress appraisal process and the outcome of performance. Assessment of students' subjective stress levels, personality variables, and attributions for control were obtained at the beginning of a difficult class required for a major in psychology. Those students perceiving that the outcome of the course would depend on their ability and effort displayed significantly less subjective stress. Performance measures, as indicated by a grade on a paper with the students' grade point …

Social Sensitivity In Adolescents And Adults With Learning Disabilities, Patricia Anne Jarvis

Psychology Theses & Dissertations

The purpose of the present study was to investigate social sensitivity and self-concept in students with learning disabilities and their non-disabled peers. Thirty students each from Junior and Senior public high schools and a community college in Tidewater, Virginia participated in the study with 15 learning disabled and 15 non-disabled students from each of the three grade levels (N-90). Students were individually assessed in 50 minute interviews for their accuracy in interpreting the thoughts and feelings of actors in tape-recorded stories depicting two adults in happy, angry, anxious, and sad interactions. A questionnaire measuring self-concept in learning situations as a …

The Relationship Of Size Class Distribution To Migratory Behavior In Brown Shrimp (Penaeus Aztecus) In Pamlico Sound, North Carolina, Mario A. Paula

OES Theses and Dissertations

The potential of migratory timing information for dynamic yield estimation in the North Carolina brown shrimp fishery has been shown. The present research investigates the influence of size class distribution on the quantitative characterization of migratory timing in the brown shrimp. Catch and nominal effort data were stratified into count size ranges and the time density model of Mundy (1979) was specified for each stratum. The recruitment patterns of the shrimp into the fishery was also investigated.

The stratification of time densities by size class has shown a definite pattern in the migratory behavior of the brown shrimp. It appears …

A Comparative Study Of Teacher Burnout In Regular And Special Elementary And Secondary Teachers, Carolyn Yvonne Wells Simmons

Communication Disorders & Special Education Theses & Dissertations

The purpose of this study was to determine to what extent, if any, does stress resulting in burnout differ among regular and special educators. Three hundred regular and special education teachers in the public school systems of Chesapeake and Portsmouth, Virginia participated in the study, The regular teachers represented a range of educational levels from kindergarten to twelfth grade, The special education teachers represented a range of educational levels from pre-school to the senior high level and from self-contained classes to resource rooms. A 2x2 analysis of variance was used to analyze the data. Rank ordering of the mean scores …

The Development Of Learned Helplessness In Retarded And Non-Retarded Children, Jennifer Miller Schwartz

Psychology Theses & Dissertations

Studies have suggested that, when mental ages are equal, mentally retarded children exhibit more symptoms of learned helplessness following experience with failure than do non-retarded children, i.e., low IQ, leads to helplessness. The present study hypothesized that IQ alone did not lead to helplessness, but that chronological age played an important role in its development. It was thought that perhaps the different levels of helplessness present in the two populations was due to the age difference necessary to make their mental ages equivalent. To test this possibility, l05 retarded, average and bright children (MA= 5.25 - 17.33 years; CA= 6.25 …

The Use Of Complex Versus Normal Modes In Structural Model Improvement, Chih Lin

Mechanical & Aerospace Engineering Theses & Dissertations

In the past, normal modes approximation to complex modes was employed by most researchers or users in the process of identification or modification of structural systems. This is true, of course for simple structures with no or proportional damping. For complex structures with nonproportional damping, even level of which is small, it will be shown that applying this approximation is inadequate. Use of complex modes instead of approximated normal modes is justified.

An algorithm is presented that computes a set of normal modes from the corresponding measured complex modes. The computed normal modes are then used in the Berman's technique …

Locus Of Control As A Function Membership In Alcoholics Anonymous, Christine B. Philput

Psychology Theses & Dissertations

This study was undertaken to examine locus of control in recovering members of Alcoholics Anonymous (AA). Variables that might affect locus of control, such as sex, age, job, previous psychiatric treatment, and length of membership in AA were examined. One hundred and fifty-three members of AA took the 24-item Levenson IPC (L-IPC) Scale, and a one-page questionnaire covering the variables of interest. A control group of 212 also took the L-IPC along with the Rotter, Nowicki-Strickland, and Marlowe-Crowne scales. Results reveal that AA members were more external than controls on the I subscale, more internal on the P subscale, and …

The Growth And Feeding Behavior Of Juvenile Spot, Leiostomus Xanthurus Lacepede, In The Nursery Region Of The James River, Virginia, John Thomas Mccambridge Jr.

OES Theses and Dissertations

The in situ growth and feeding behavior of juvenile spot, Leiostomus xanthurus Lacepede, was investigated for populations in the nursery area of the James River, Virginia. Growth of juvenile spot was found to be fairly rapid (11.34 mm/month, standard length) during their first summer in the nursery grounds, but it levelled off in the autumn. The mean size of spot after the first year was calculated to be 195 mm total length. The weight-length relationship was log W = -5.018 + 3.246(log L), where W = wet weight in grams and L = standard length in millimeters.

Juvenile spot appeared …

Simultaneous Functional Hermaphroditism In The Shrimp Hippolysmata Wurdemanni (Gibbes) (Decopoda: Caridea: Hippolytidae), Marie Hollister Bundy

OES Theses and Dissertations

The caridean shrimp Hippolysmata wurdemanni Gibbes was studied from a histological and a behavioral basis and was found to be a protandric hermaphrodite which later adopts simultaneous functional hermaphroditism. When the animal reaches a certain size, the androgenic gland degenerates, the male secondary sexual characteristics are lost, and vitellogenesis occurs in the anterior portion of the gonad. The animals do not lose the ability to function as males as evidenced by the presence of mature sperm in the gonad and the gonadal lumen of gravid shrimp, and the ability of both members of an isolated pair of shrimp to repeatedly …

A Model Of The Population Dynamics Of The Blue Crab In Chesapeake Bay, Betty Springer Hester

OES Theses and Dissertations

This study has particular application to the blue crab fisheries in Chesapeake Bay, an economically important industry whose successful management has been hindered by relatively poor understanding of the population dynamics. Recent biological studies have indicated a systematic spawning behavior which seems designed for ejection of larvae seaward from the bay entrance where they spend their pre-metamorphosis stages in the neuston. A physical mechanism for retention of the larvae in sufficient proximity to the bay entrance for their return at the proper time which involves the action of wind stress in shallow waters is proposed. Since the supply of blue …

Determination Of Erythrocyte Zinc Concentrations Using Zeeman Effect Atomic Absorption Spectroscopy, Tanya Maranda Lewis

Chemistry & Biochemistry Theses & Dissertations

The purpose of this research project was to develop assay procedures for determination of zinc in erythrocytes. Three methodologies were developed. The methods were evaluated on the basis of within-run and between-run precision. The most reproducible method, the 213.856 nm flame methodology, was used to determine red blood cell zinc concentrations in more than 200 samples obtained from the Neonatal Intensive care Unit at the Children's Hospital of the King's Daughters.

This study demonstrated that erythrocyte zinc levels in premature infants were similar to those of healthy adults. A linear relation between plasma and red blood cell zinc concentrations was …

Analysis And Stability Of Closed Surge Tanks, John Emory Fowler

Civil & Environmental Engineering Theses & Dissertations

The equations representing the water surface oscillations in a closed surge tank form a set of nonlinear ordinary differential equations when the system is considered as lumped. Because of the nonlinear terms present in the equations, a closed-form solution of the equations is not available. Several numerical methods ranging from single step methods to higher-order multi-step methods were used to find numerical solutions to the governing equations. As all the methods required a similar amount of CPU time, the degree of accuracy required would determine which numerical method should be used. The effect of various system parameters on the stability …

The Effect Of Therapeutic Touch On Anxiety And Physiological Measures, Marie Nicholas Bremner

Ellmer School of Nursing Theses & Dissertations

The purpose of this study was to investigate the relationship of therapeutic touch to anxiety, blood pressure, heart rate, and respiratory rate of 30 hospitalized women between the ages of 30 and 65 with the medical diagnosis of cancer. Subjects were matched into three intervention groups; three consecutive days subjects received a five minute intervention by therapeutic touch, casual touch, or no touch. A-trait and A-state anxiety were measured by the Self-Evaluation Questionnaires developed by Spielberger, Gorsuch, and Lushene. A factorial two-way analysis of variance revealed that subjects who received intervention by therapeutio touch experienced a significant reduction in A-state …

The Effect Of A Cardiac Education Program On The Knowledge, Stress, And State Anxiety Levels Of First Time Post Myocardial Infarction Patients In A Post Coronary Care Unit, Jeanine L. Johns

Ellmer School of Nursing Theses & Dissertations

The effect of a cardiac education program in terms of changes in knowledge, state anxiety and stress were examined for persons suffering a myocardial infarction for the first time. In addition, the relationship between stress and trait anxiety and changes in knowledge and state anxiety were examined. A sample of 20 patients were selected from two medium sized hospitals in Southeastern Virginia. Statistically significant differences at the .01 level were found between the means of the pretest and posttest scores of the experimental group for knowledge and state anxiety using the t test for dependent groups. The same test showed …

An Analysis Of The Correlation Between Nurses' Attitudes Toward Death And Their Presence With The Dying Patient, Uvonna Weeks Daniels

Ellmer School of Nursing Theses & Dissertations

The correlation between the nurses' attitudes toward death, as determined by the Questionnaire for Understanding the Dying Person and His Family, and the nurses' presence with a dying patient at the time of death was analyzed. The subjects were 31 registered nurses employed by eight acute care hospitals in Southeastern Virginia. The nurses were grouped into categories of flexible, moderate, and rigid attitudes toward death, relative to their scores on the questionnaire. Other variables of the nurses' age, sex, religion, strength of religious beliefs, entry level education, highest education level, years of experience, death of family members or friends, attitudes …

Registered Nurses' Ability To Discriminate Similar Human Need Fulfillment Alterations Specific To Chronic Obstructive Pulmonary Disease And To Diabetes Mellitus, Kathleen Bowen Waite

Ellmer School of Nursing Theses & Dissertations

The problem for this research study was to ascertain if registered nurses of varying educational backgrounds and experience discriminated similar human needs as being altered by specific pathologic states. The two pathologic states studied were chronic obstructive pulmonary disease and diabetes mellitus, chosen for their high prevalence in the population. A population sample of 55 registered nurses practicing on medical units in five hospital settings were surveyed. Data for this study were collected using the Human Needs Assessment Scales developed for this study. It was determined that registered nurses in this study did discriminate similar human need fulfillment alterations specific …

A Study Of Increased Flow Off The Eastern Seaboard Of The United States Within Four Synoptic Flow Patterns During The Winter Months, John Dale Liechty

OES Theses and Dissertations

A study of increased winds during the winter season off the United States Eastern Seaboard was made in each of four synoptic flow patterns: prefrontal; postfrontal; northeast; and southerly. Eight years of synoptic data for the months October through March from two pairs of stations were utilized. Each pair consisted of one land and one sea station; of the sea stations, Frying Pan Light was located in or near the warmer water of the Gulf Stream while Chesapeake Light was situated in colder, coastal water. Both land stations were situated in the vicinity of the coast.

A statistical analysis was …

Psyche And Time: The Phenomenology Of Time Consciousness, Sharon Fleet Hartman

Institute for the Humanities Theses

Time in its inward form may be able to provide a significance which sustains the human spirit. If this is true, it becomes unnecessary to seek an enduring significance for life in the transcendent.

Western man's attitudes toward time are a composite of religious, historical, and cultural assumptions. The Christian model of time supported man by its emphasis on God's interventions in the world. The scientific model of time left man adrift in an objective world. The ascendancy of the scientific model brought a devaluation of both time and human life.

Bergson, Husserl, and Merleau-Ponty all describe a type of …

Viscous Modeling And Computation Of Leading-And Trailing-Edge Vortex Cores Of Delta Wings, Balakrishnan Lakshmanan

Mechanical & Aerospace Engineering Theses & Dissertations

A Finite-Difference method is presented for calculating steady quasi-axisymmetric flow of an incompressible fluid at large Reynolds number. Approximations of the boundary-layer type are employed to reduce the Navier-Stokes equations to a pair of non-linear parabolic equations. Along with the governing equations, initial conditions are specified at some upstream cross section and boundary conditions are specified at the axis of symmetry and on the outer bounding surface.

The governing equations are replaced by a set of quasilinear finite-difference equations. The solution is obtained by a marching technique, which proceeds step-by-step in the axial direction. At each axial station, an iterative …

Polychlorinated Biphenyl Levels In The Ocean Scallop (Placopecten Magellanicus) Gmelin From The Philadelphia Sewage Sludge Disposal Site, Guy Jeffrey Hall

OES Theses and Dissertations

Ocean Scallops (Placopecten magellanicus) were sampled from stations in and around the Philadelphia Disposal Site. Each sample was dissected and aliquots of adductor muscle and reproductive tissue were chemically extracted for Polychlorinated Biphenyls (PCBs). A perchlorinated procedure outlined by Diosady et al., 1972, Aromour, 1973 and Crist et al., 1977 was employed to increase detection levels and simplify quantitation of PCBs. PCB levels were reported in dry weight and lipid weight of both adductor muscle and reproductive tissue. Findings indicated residual levels or PCB/lipid weight increased as lipid levels decreased in both tissue types. Levels detected in all adductor muscle …

Evaluating The Effects Of Alum With Polyelectrolyte Coagulant Aids In Treatment Of Low Turbidity Waters, Kenneth John Stockwell

Civil & Environmental Engineering Theses & Dissertations

Potable water sources usually require treatment for removal of suspended organic and inorganic particles. Conventional treatment processes incorporate chemical coagulants for removal of these suspended particles. Alum is a widely used coagulant that can provide adequate removals of turbidity. However, high alum dosages are required for treatment of low turbidity waters producing a voluminous sludge that is difficult to dewater.

Recent Federal regulations have limited disposal options for chemical sludges. This has prompted a reevaluation of coagulants and their dosages with the goal of reducing the amount of sludge produced and improving the sludge handling characteristics necessary for ultimate disposal. …

Implementation Evaluation Of A Social Detoxification Program, Thomas M. Slaven

Theses and Dissertations in Urban Services - Urban Education

While cities across the United States are attempting to revitalize their central business districts, the presence of the public inebriate remains one of the most neglected urban problems hampering redevelopment efforts. An evaluation of the implementation of a social detoxification program was conducted to monitor planning, initial staffing, training, building community linkages, impact on the criminal justice system, and changes in clients' working and drinking behavior. Public Drunkenness arrests, and working and drinking behavior were measured at intake, three month and six month follow-up with a sample of clients undergoing detoxification, a comparison group of individuals jailed but not detoxified, …

A Quantitative Study Of The Aquatic Macroinvertebrates In An Irregularly Flooded Salt Marsh, Smith Island, Virginia, Leon L. Robert Jr.

Biological Sciences Theses & Dissertations

Little is known about the aquatic macroinvertebrate community structure in coastal salt marshes. This study investigated the aquatic macroinvertebrate community structure in a coastal Virginia salt marsh. Sixteen samples were taken weekly from two different sites on Smith Island, Virginia, from April to mid-October 1982. Bimonthly samples were taken during the months March and November due to low density of organisms and reduced growth rates at these times.

A total of 46 taxa were collected with 17 occurring regularly, indicating a relatively diverse fauna. Wide fluctuations in the physical parameters were observed; however, temporal changes in the macroinvertebrate community cannot …