Digital Commons Network^™

The Distribution Of Ceratia Over The Mid-Atlantic Bight, Paul V. Zimba

Biological Sciences Theses & Dissertations

The distribution and concentration of Ceratium species, between Cape Hatteras, North Carolina and Long Island, New York ls discussed in relation to specific physical factors and the development of a phytoplankton bloom. The progression of high Ceratium counts Is discussed for the Bight areas of New York, Delaware, and the Chesapeake Bay (April through June). The concentration of Ceratium species declined after June, with highest concentrations along the New York and Delaware coast-lines. Coastal regions (less than 12 km from shore) were associated with high concentrations of several species. Path and regression analysis were used to relate physical factors and …

Color Display Of Vowel Spectra As A Training Aid For The Deaf, Amir Jalali Jagharghi

Electrical & Computer Engineering Theses & Dissertations

The objective of this research was to develop a transformation for mapping speech parameters to color parameter. This transformation is done in real-time, and the resulting color parameter are continuously displayed on a color monitor. This visual speech display is to be used as a speech articulation training aid for the deaf. The conversion of speech acoustic signals into speech parameter was accomplished using special -purpose electronics. The real-time conversion of speech parameter to display parameter was controlled by an 8086/8088 microprocessor operating in an S-100 bus structure. The coefficients of the Karhunen-Loeve series expansion of speech power spectra were …

Small Farmers' Cooperatives In Brazil, 1964-1984 Reasons For Success Or Failure, Henry H. Gerber

Graduate Program in International Studies Theses & Dissertations

This study is concerned with cooperative business enterprises of small farmers. The topic has been chosen because peasants' association in supply and marketing cooperatives is considered an essential element in rural development. The author's field experience leads him to agree in principle with this assumption. But, as exemplified by Brazil, a variety of factors (ecological, sociohistorical, legal, economic and so forth) may hinder or help the inception and survival of cooperatives.

Thus, if a government aims at integrating the small producer into the national economy as supplier and consumer (as in Brazil), measures to implement t~is policy must not be …

The Apparent Dissociation Constants Of Carbonic Acid In Low Salinity Waters, Ching-Hui Hsu

OES Theses and Dissertations

The first and second apparent dissociation constants of carbonic acid in artificial seawater and diluted artificial seawater, K₁ ' and K₂ 1 were determined at selected combinations of temperatures and salinities between 2 to 30° C and 0 to 35 o/oo with special attentions to waters with salinities below 20 o/oo at atmospheric pressure by measuring K₁ ' and the product of K₁ ' and K₂.

The results can be expressed as functions of temperature and salinity by the following equations, pK₁ '=3360.206T^-1 +0. 033331 T-14.8303-0.09633x (Cl^1/2) pK₂ '=14911.671 …

Analog Computer Simulation With Automatic Scaling By Digital Computer, Mark Anthony Motter

Electrical & Computer Engineering Theses & Dissertations

A computer-aided design approach for the simplification of analog computer simulation is presented. The simulation configuration consists of an EAI 2000 analog computer with serial communications link to a PDP — 11/24 digital computer. Under control of the PDP-11, the analog simulations are realized with appropriate time and magnitude scaling which adjusts the range of the simulation coefficients and prevents overloads of the analog components. The analog computer hardware configuration accommodates both stable plants up to eighth order and closed-loop systems up to tenth order. Cascade compensation is provided for the closed-loop systems.

The plant may be described by either …

Mossbauer Study Of Gadolinium Iron Garnet, Jun Li

Physics Theses & Dissertations

The Mossbauer spectroscopic study of Gadolinium Iron Garnet R₃Fe5^O12 (GdIG) has been performed over the temperature range of 7K to 715K. Both high temperature and low temperature properties of GdIG have been studied. The magnetization is along (111) direction over this temperature range. The internal magnetic fields at Fe⁵⁷ sites in GdIG gave two values for the octahedral(a), site which differ by 4-6 KOe and one value for the tetrahedral (d), site at each temperature. Measurements of the total isomer shift in the spectra show that the shift of the center of the spectra consists …

Minimal Norm Constrained Interpolation, Larry Dean Irvine

Mathematics & Statistics Theses & Dissertations

In computational fluid dynamics and in CAD/CAM a physical boundary, usually known only discreetly (say, from a set of measurements), must often be approximated. An acceptable approximation must, of course, preserve the salient features of the data (convexity, concavity, etc.) In this dissertation we compute a smooth interpolant which is locally convex where the data are locally convex and is locally concave where the data are locally concave.

Such an interpolant is found by posing and solving a minimization problem. The solution is a piecewise cubic polynomial. We actually solve this problem indirectly by using the Peano kernel theorem to …

Controlling The Big Stick: The United States Navy And The Cuban Intervention Of September 1906, Christopher A. Abel

Graduate Program in International Studies Theses & Dissertations

A case study method is used to examine the role played by the United States Navy in bringing about the Second Cuban Intervention of 1906-1909. The 1906 American navy had a distinct lack of centralized direction during the September crisis in Cuba. As a consequence, initiative in the crisis passed to the several naval officers representing the United States in Cuba at the time. These officers acted in consonance with the navy's own institutional agendas and contrary to the objectives of the Theodore Roosevelt administration. In so doing these officers were supported and even rewarded for their actions by the …

Feasibility Studies Of Conversion Electron Mossbauer Spectroscopy (Cems) Of Iron-Doped Inp, Edward Agyekum

Physics Theses & Dissertations

An electron detector for conversion electron Mossbauer spectroscopy (CEMS) has been designed and built. Tests have been performed to study the effects on the electron detector resolution with respect to high anode voltage, He/CH₄ gas flow rate, and counting rate. These parameters have been optimized to detect the 7.3 keV conversion electrons emitted following resonant absorption of the 14.4 keV source gamma-rays associated with the Mossbauer effect using ⁵⁷Fe nuclei. CEMS spectra have been obtained using standard ⁵⁷Fe enriched and natural iron samples. CEMS spectra and Mossbauer transmission spectra have also been obtained for iron-compensated InP (InP:Fe) …

Curtain Of Silence Japanese In Soviet Custody, 1945-1956, William F. Nimmo

Graduate Program in International Studies Theses & Dissertations

The Soviet Union attacked- and defeated Japanese forces in Northeast Asia in the final days of the Second World War, and 2,100,000 Japanese soldiers and civilians suddenly fell into the hands of the Red Army. This thesis examines the experiences of Japanese in Soviet custody, efforts to obtain their release, and their eventual return to Japan. Repatriation of civilians from Soviet-controlled areas was slow, and military personnel were taken to the USSR for use as forced labor for several years. The Soviets conducted an intensive Marxist-Leninist indoctrination program for prisoners of war, and a professed acceptance of communism was a …

Anxiety Differences Associated With Transtelephonic And Conventional Pacemaker Client Follow-Up Methods, Julieta Advento Richman

Ellmer School of Nursing Theses & Dissertations

The purpose of this study was to explore if differences existed in state and trait anxiety between clients with cardiac pacemakers who were utilizing a transtelephonic or conventional method of health care follow-up. A convenience sample of 44 clients with cardiac pacemakers completed the State-Trait Anxiety Inventory developed by Spielberger, Gorsuch, and Lushene (1964) and a demographic inventory. Subjects were classified into two groups according to the method of follow-up: Group I (n=22) was the transtelephonic follow-up, and Group II (n=22) was the conventional follow-up. Data were analyzed using t-tests for independent samples. The results showed that there were significant …

The Effects Of Blood Glucose Self-Monitoring On Self-Esteem And The Ability To Apply Knowledge About Diabetes Mellitus, Nancy-Lu F. Moul

Ellmer School of Nursing Theses & Dissertations

This study explored the effect of blood glucose self-monitoring on two dependent variables: (a) the diabetic client's self-esteem, and (b) the diabetic client's ability to apply knowledge about diabetes mellitus. The sample consisted of two groups of adult Type I diabetic clients. Group I consisted of ten clients who had been performing blood glucose self-monitoring for at least one year, and group II consisted of ten clients who had been performing urine testing for at least one year. A questionnaire was utilized which included: (a) a demographic data sheet, (b) a diabetic knowledge tool, and (c) a self-esteem tool. The …

Correlates Of Knowledge And Locus Of Control On Burden In Professional Caregivers Of Alzheimer's Disease Victims In Three Institution Types, Ruth A. Manning-Gay

Community & Environmental Health Theses & Dissertations

In assessing professional caregivers of Alzheimer's Disease victims, this study tested whether, 1) knowledge would influence perceptions of burden in providing care to such patients, and if 2) individual locus of control would influence perceptions of burden in caring for; Alzheimer's I patients. Professional nurses (BSN's, RN's, and LPN's) from nursing banes, hospitals and psychiatric facilities were asked to complete a three part survey. Three instruments were utilized in this study: the Burden Self-Interview by Zarit, Reeves and Bach-Peterson and adapted for professional caregivers, a 15 item knowledge quiz and the North Carolina Internal External scale (short form) by Schopler, …

An Evaluation Of Education Programs For Pregnant Teens In Three Selected Urban Virginia Communities, Susan K. Eilberg

Theses and Dissertations in Urban Services - Urban Education

As adolescent pregnancy becomes more prevalent and funds for social programs diminish, the need to define the parameters of successful educational programs for pregnant teens becomes clear. This dissertation evaluated four programs to determine the effect of centralization of instruction and the length of time a student spent in her program on self-concept, vocational awareness, academic achievement, attendance and return to regularly assigned school.

The researcher administered the Piers-Harris Self-Concept Scale and the Holland Self-Directed Search to 125 female students. Data were also gathered from school records on the remaining variables. Qualitative data were gathered to supplement quantitative data. Interviews …

Foraminiferal Paleoenvironments Of The Eastover Formation (Upper Miocene Virginia), Joann H. Goshorn

OES Theses and Dissertations

Sixty-two taxa representing 29 genera from 39 foraminiferal sample pairs have been documented and analyzed in a paleoenvironmental study of the Eastover Formation in southeastern Virginia. The Eastover Formation consists of a lower Claremont Manor Member, a silt fine-grained sand and an upper Cobham Bay Member, a shelly fine grained sand. Planktonic specimens were rare and indicated a late Miocene to early Pliocene age for the Eastover Formation. Benthics were used to interpret paleoenvironments by comparison with data from the distribution of Recent foraminifera, species diversity, planktonic to benthic ratios, and sediment analyses. The foraminifera indicate that the Eastover Formation …

Test Derivation For Cmos Iterative Logic Arrays, Ravi Sharma

Electrical & Computer Engineering Theses & Dissertations

Testability criteria for stuck-open (s-op) faults in one-dimensional unilateral iterative logic arrays (ILA) of CMOS combinational cells are considered in this thesis. A functional fault model to represents-op faults i~ an ILA cell is given. The procedure to detect as-op fault needs a pair of test vectors. The first is used to set up the initial conditions required to test the fault and the second is the test which distinguishes between the good and the bad circuit. Based on this approach necessary and sufficient conditions are given for the testability of as-op fault in a CMOS ILA cell. These conditions …

Selecting Non-Point Source Pollution Treatment Practices Using Linear Optimization, John Gardy Garland Iii

Civil & Environmental Engineering Theses & Dissertations

This paper provides a case study application of a linear optimization program as a water quality management tool. The optimization program seeks to minimize the cost of nonpoint source pollution control by selecting the best combination of pollution control management practices for Hampton, Virginia. The management practice options are grass swale roadways, porous pavers, ponds, detention basins and fertilizer management education. Management practice selection is limited by constraints on land-use and water quality. Pollutants evaluated are total nitrogen, total phosphorus, suspended solids, fecal coliforms and biochemical oxygen demand (five-day). The value in the water quality constraints for pollution loading on …

Laity Expectations Of Ministers In The Black Urban Church: A Study Of Political And Social Expectations In The Context Of Ministry To Community And World, James Henry Harris

Theses and Dissertations in Urban Services - Urban Management

The study examined the Black church laity's expectations of the urban minister regarding his involvement in specific social and political issues that confront inhabitants of urban areas. A survey was administered to individuals in Black churches of different protestant denominations in a Southeastern Virginia City in order to determine the degree of the laity's expectations. Specifically, the survey sought answers to the questions: Do Black church laity expect the minister to deal with socio-economic and political problems in urban areas? and, What particular urban problems do the laity expect the minister to offer leadership in facing or solving?

While this …

Fluvial Depositional Processes Of A Tropical River, Colombia, South America, Michael L. Babuin

OES Theses and Dissertations

Fluvial depositional processes along the Rio Magui in south-western Columbia are primarily controlled by localized uplift downstream of the mouth of the river, sediment sources that produce both coarse-and-fine-grained load, and numerous over-bank flows caused by torrential rainfall.

Structural Self-Shadowing And Its Effects On The Thermal-Structural Behavior Of Orbiting Trusses, Jack Mahaney

Mechanical & Aerospace Engineering Theses & Dissertations

The determination of structural shadowing is described. The computation of environmental heat loads for slender structural members in earth orbit is described, and two methods for finite element thermal analysis are described . The effects of self-shadowing on the thermal structural behavior of single truss members and two different trusses are presented. In each case the shadowing produces a noticeable effect on the temperature distributions on truss members, and on the deformations of the trusses.

The Ring Of Single Solutions, Deborah Anne Plummer

English Theses & Dissertations

The Ring of Single Solutions is a cycle of poems divided into three parts. Central to each section is the motif of travel and the image of the circle. The journeys of the personae are physical, intellectual or spiritual and sometimes a combination of all three. These journeys always relate to other experiences which have profoundly affected the way in which the world is viewed, I connect these experiences with the image of the circle. I have tried to imply through the language, settings and organization of the poems relationships between seemingly incongruous events which one is often unaware of. …

Analytic Forms Of Bidirectional Reflectance Functions For Application To Earth Radiation Budget Studies, Natividad Manalo Smith

Mechanical & Aerospace Engineering Theses & Dissertations

Reflected solar radiative fluxes emerging from the Earth's top of the atmosphere are inferred from satellite broadband radiance measurements by applying bidirectional reflectance functions (BDRFs) to account for the anisotropy of the radiation field. BDRFs are dependent upon the viewing geometry (i.e. solar zenith angle, view zenith angle, and relative azimuth angle), the amount and type of cloud cover, the condition of the intervening atmosphere, and the reflectance characteristics of the underlying surface. A set of operational Earth Radiation Budget Experiment (ERBE) BDRFs is available which was developed from the Nimbus 7 ERB (Earth Radiation Budget) scanner data for a …

Unsteady Transonic Flow Over Slender Bodies, Cevdet Aydun

Mechanical & Aerospace Engineering Theses & Dissertations

The unsteady transonic small disturbance equation for an oscillating slender body is obtained from the full potential equation in cylindrical coordinates by means of a perturbation analysis. The time-dependent body-boundary condition is reduced into a simpler form by matching the outer and inner flows. Also, a time-dependent pressure coefficient over the slender body is derived by means of a matching principle. The simplified form of the body-boundary condition is incorporated into the difference equations at the body axis. This application allows use of the cylindrical coordinate system for the problem. By prescribing several different body-boundary conditions, various modes of body …

Clinical Effectiveness Of Hydrogen Peroxide-Sodium Bicarbonate Paste On Human Periodontitis Treated With And Without Scaling And Root Planing, Sylvia M. Lyne

Dental Hygiene Theses & Dissertations

The purpose of this investigation was to determine the main and interaction effects of two oral hygiene regimens and periodontal instrumentation on the periodontal health status of subjects between the ages of 18 and 70 over a two-month period. The sample consisted of 16 subjects with moderate periodontitis. A split-mouth design was used; subjects brushed with fluoridated toothpaste on one side of the mouth and brushed with a hydrogen peroxide-sodium bicarbonate paste on the contralateral side. For each treatment, scaling and root planing were randomly assigned to one arch. At two-week intervals, the periodontal health status was measured using the …

The Synthesis And Evaluation Of A New Analog Of Phencyclidine (Pcp), William H. Johnson Jr.

Chemistry & Biochemistry Theses & Dissertations

Based on an interpretation of the literature of phencyclidine (PCP) together with an examination of the relevant models or prototype structures, this research has attempted to design and synthesize a rigid analog of the phencyclidine structure. The parent ring systems suggested for this study were the 1-arnino and 2-arninornethyltetralins, 10 and, 12.

Several organic compounds, based on this design, have been prepared by classical examples of reductive alkylation reactions of the corresponding 2-hydroxyciethylene-1-tetralones, 11, and by the condensation and subsequent reductive alkylation of the 1-arninotetralin, 9. These arninomethyltetralones, 28, 29 and 30, together with an example of a substituted 1-arninotetralin, …

Statistical Calibration Theory, James John Mckeon

Mathematics & Statistics Theses & Dissertations

A calibration method substitutes for measurements, X(,i), that are accurate but impractical or costly, a set of measurements, Y(,i), that are less accurate but simpler or less costly. There are two general types of calibration methods. The classical approach in which once the calibration sample is drawn, the estimates of the X values for a given unit is found without any consideration of the distribution of X values for the other units to be measured. This corresponds best to the literal meaning of the word "calibration". Maximum likelihood estimation is the statistical formulation of the classical approach.

The second approach …

A Geophysical Model Of The Gravity-Magnetic High, Virginia Coastal Plan, Gordon Everett Davison

OES Theses and Dissertations

The coastal plain province of Virginia is characterized by a coincidental gravity and magnetic high separating Appalachian-trend geophysical signatures to the west from non-Appalachian signatures to the east. Two cross-trend gravity and magnetic profiles, one on the Northern Neck of Virginia and one along Interstate Highway 64, were used to interpret the anomalous high. The profile models suggests that the anomaly is characterized by high-density, variably magnetic, east-dipping (60°) crustal blocks. Further information from well-logs indicate that the anomaly is due to meta-mafic rocks of oceanic origin, flanked by low-density, lower susceptibility, granitic units. This suggests that the anomalous gravity-magnetic …

The Evolution Of Doris Lessing's Art From A Mystical Moment To Space Fiction, Nancy Topping Bazin

English Faculty Publications

After publishing ten major novels, Doris Lessing has begun writing what she calls '·space fiction'· for her new series entitled Canopus in Argos: Archives. In a review of the first two novels published in this series, namely, Shikasta ( 1979) and the Marriages Between Zones Three. Four, and Five (1980)¹. Jean Pickering stresses that many of Doris Lessing's most avid readers were initially attracted to her because of her insights about the female experience and because of her allegiance to nineteenth-century realism." Pickering suggests that Lessing's growing interest in space fiction and Sufism (Islamic mysticism) has …

Foreign Demand For United States Higher Education: A Study Of Developing Countries In The Eastern Hemisphere, Vinod B. Agarwal, Donald R. Winkler

Economics Faculty Publications

(First Paragraph) Foreign student enrollments in the United States have increased rapidly over the past 25 years. The total number increased from 36,494 in 1954 to 336,990 in 1982. While foreign students still represent less than 2% of all higher education enrollments in the United States, this proportion is likely to grow over the next decade as enrollments of American citizens decline. One consequence of the growth to date has been that many colleges and universities depend on foreign students for an important part of their tuition revenue or enrollment-determined budget, and this dependence is also likely to grow over …

Large Deviation Local Limit Theorems For Arbitrary Sequences Of Random Varibles, Narasinga Rao Chaganty, J Sethuraman

Mathematics & Statistics Faculty Publications

The results of W. Richter (Theory Prob. Appl. (1957) 2 206-219) on sums of independent, identically distributed random variables are generalized to arbitrary sequences of random variables T_n. Under simple conditions on the cumulant generating function of T_n, which imply that T_n/n converges to zero, it is shown, for arbitrary sequences {m_n}, that k_n (m_n), the probability density function of T_n/n at m_n, is asymptotic to an expression involving the large deviation rate of T_n/n. Analogous results for lattice …