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Turbulence Spectra In A Well-Mixed Estuary, Jong Yul Chung

OES Theses and Dissertations

This dissertation is an attempt to determine and describe some of the turbulent process in a well-mixed estuary. The processes are identified by the study of turbulent velocity fluctuations. These velocity records have been analyzed using standard digital methods to obtain spectral density, spectral energy, and cross-spectra of velocity. In order to study the generation and transfer of the turbulent moment and energy, and the intermittent nature of the so-called "Bursting or "ejections and sweeps," the distribution of u, v, w, and the Reynolds stress has been studied.

Production Of A Population Of The Stout Razor Clam (Tagelus Plebeius Solander) In A Virginia Estuary, Mark James Grussendorf

OES Theses and Dissertations

The annual net secondary production of the stout razor clam, Tagelous plebeius, was estimated at three sites on an intertidal sand flat at Lynnhaven Inlet, Virginia. Samples were taken at six week intervals for one year. The range of net production (P), mean annual biomass (B), and P/B ratios was 18.3-28.7 g m^-2year^-1, 27.2-53.3 g m^-2, and 0.54-0.67, respectively. The total biomass did not show significant seasonal variation though differences between sites were significant. Production varied temporally but was not significantly different between sites.

New Student Record, 1979, Old Dominion University

Yearbooks

1979 issue of the New Student Record of Old Dominion University

A Ranking Of Competency Areas Of Instruction By Suffolk City Merchants To Determine Felt Importance As A Basis For Distributive Education Curriculum Sequencing, Henry O. Billups

OTS Master's Level Projects & Papers

The problem of this study was to determine the amount of classroom emphasis a Distributive Education coordinator should place on each major competency area.

A Six-Weeks Individualized Curriculum Guide In Construction Technology For Junior High School Students, Dan R. Deetz

OTS Master's Level Projects & Papers

The problem of this study was to develop a six-week self-contained module for teaching Construction Technology on residential house framing to junior high school students. The unit covered various areas of construction involving framing procedures. Three important areas of study have been developed. They include floor framing, wall framing and roof framing.

A Survey Of The Attitudes Of Industrial Arts Teachers In The Tidewater Area Of Virginia, John Edwin Jones

OTS Master's Level Projects & Papers

The purpose of this study is to survey the attitudes of a small group of educators, industrial arts teachers in the Tidewater area of Virginia, toward competency-based education.

Additional Comments On Reproductive Strategies And Population Fluctuations In Microtine Rodents, Michael S. Gaines, William M. Schaffer, Robert K. Rose

Biological Sciences Faculty Publications

Recently, Schaffer and Tamarin (1973) proposed a model relating changes in reproductive effort (RE) to fluctuating densities in microtine rodents (lemmings and voles). They assumed (and presented data supporting this assumption) that the major effect of increased crowding would be a reduction in survival among prereproductives, thereby lowering the effective fecundity (Schaffer and Rosenzweig 1977) of their parents. As a consequence, Schaffer and Tamarin argued that the optimal reproductive expenditure, E(N), should decline with increasing population size, N. They also deduced the shape of the zero-growth isocline, N*(E), for differing levels of RE and plotted both E(N) and N*(E) on …

Stable Equilibrium Statistical States For Spheromaks, George Vahala, Linda L. Vahala

Electrical & Computer Engineering Faculty Publications

Incompressible nondissipative magnetohydrodynamic turbulence is treated for spherical systems. From the absolute equilibrium expectation values of the fields one can investigate those initially quiescent states for which no large mean square velocity will develop. This stable state is force-free and gives rise to the Hill vortex structure for the magnetic flux surfaces.

Sufficiency Of A Numerical Downstream Continuation, Charlie H. Cooke

Mathematics & Statistics Faculty Publications

(First paragraph) Customarily one does not impose n-th order boundary conditions on the solution of initial/boundary value problems whose characterizing partial differential equations are also n-th order. However, conjecture that such problems are not well-posed, or that a solution might not exist, is not always justified [l]. Perhaps a physically more natural example is provided by problems of computational fluid dynamics. Here boundary conditions which correctly should be applied at an infinite distance downstream from the region of interest are for computational convenience often applied at a finite location [2]. Results of numerical experimentation on viscous flows governed by …

Note: On Summability And Positive Linear Operators, J. J. Swetits

Mathematics & Statistics Faculty Publications

Quantitative estimates for approximation by positive linear operators are obtained with the use of a summability method which includes both convergence and almost convergence.

Alkalinity And Ph In The Southern Chesapeake Bay And The James River Estuary, George T. F. Wong

OES Faculty Publications

The ranges of alkalinity and pH in the southern Chesapeake Bay and the James River estuary were 2.25 meq·liter⁻¹ at 32‰ to

The Comparative Ecology Of Two Populations Of The Troglobitic Isopod Crustacean Lirceus Usdagalun (Asellidae), James Alexander Estes

Biological Sciences Theses & Dissertations

Aquatic communities of two caves in Lee Co., Virginia, were compared, and an examination was made of the life history phenomena of the troglobitic isopod Lirceus usdagalun. Measurements of physical and biological parameters were made in Thompson Cedar Cave and Gallohan Cave No. l. A contagious distribution was exhibited by populations of L. usdagalun in both caves and also by the population of another troglobitic isopod, Caecidotea recurvata, in Gallohan Cave No. 1. This distribution was attributed to aggregations of individuals which were considered to occur in areas of preference or optimal habitat patches. Lirceus usdagalun exhibited a …

Animal-Sediment Relationship Study Of The Western Branch Of The Lynnhaven River, Charles Perry Seymour

Biological Sciences Theses & Dissertations

The animal-sediment relationships of the marine benthic infauna of an estuarine river system, Lynnhaven River, Virginia Beach, Virginia, were studied at six sites, sampled bimonthly for one year. Six species were found to dominate all of the sampling periods and sites for the year. The greatest number of individuals, biomass, and species were found at the sand sites. Deposit feeders were recorded in greater number than suspension feeders at both the sand and the mud sites.

Cluster and nodal analyses were successful in demonstrating animal-sediment relationships for the intertidal regions of the river system.

Life Goals Of Five Dental Hygiene Groups In Three Educational Settings, Kathleen Olivia Hodges

Dental Hygiene Theses & Dissertations

This study investigated life goals of dental hygiene students and 1978., 1976, 1975, and 1974 graduates in three different educational settings.

The California Life Goals Evaluation Schedule was used to measure life goals of dental hygienists attending, or who had attended, Cuyahoga Community College· in Ohio, Idaho State University, and Old Dominion University in Virginia.

An ex post facto 5x3 research design was used. Year of graduation and educational setting were the nonmanipulated independent variables; ten scores on the California Life Goals Evaluation Schedule were the dependent variables; and age was used as a covariant.

Two-way multivariant analysis yielded no …

Spring Phytoplankton Composition And Distribution In Coastal Waters Between Nova Scotia And The Chesapeake Bay, Larry William Neal

OES Theses and Dissertations

This investigation was directed toward satisfying a recognized lack of informat on regarding phytoplankton composition and density in shelf waters between Nova Scotia and the Chesapeake Bay. A sedimentation technique was used in determining the phytoplankton composition of 99 samples collected between 2 March and 3 April 1971. Chlorophyll-a samples collected concurrently were analyzed fluorometrically. Simple correlation analyses were utilized in describing distributional patterns of phytoplankton density and chlorophyll-a concentration with respect to water temperature, salinity, density, depth, distance from shore and latitude. Analysis of variance was employed in assessing regional differences in phytoplankton density and chlorophyll-a.

The phytoplankton flora …

Inviscid Two-Dimensional Vortex-Panel Method For Calculating The Pressure Distribution Over Noncircular Cylinders At Various Flow Incidence Angles, Sophia Kokkinos Ashley

Mechanical & Aerospace Engineering Theses & Dissertations

A method. has been implemented to calculate the potential flow pressure distribution over noncircular cylinders at various flow incidence angles. The inviscid, solution has been obtained by replacing the surface of a noncircular cylinder with a vortex sheet. The surface has been approximated by a number of flat panels. Each vortex panel has been assumed to have a constant vorticity, and the condition of no-circulation applied.. Solutions yield the local tangential velocity and pressure coefficient at each point.

The accuracy of the method has 'been established through comparison of the predicted results with existing exact theoretical results.

Comparisons of the …

The Distribution Of Several Metals And Cation Exchange Capacity In Sediment Fractions From An Artificial And Natural Marsh, James River, Virginia, William Nivens

OES Theses and Dissertations

In order to examine the mechanisms by which Fe, Mn, Ca, Zn, Cu, Ni and Pb are bound in sediments, a sequential selective extraction procedure was employed on sediment samples collected at an experimental dredge disposal marsh and a neighboring natural marsh located near Windmill Point, James River, Va. The metal concentrations were determined in six phases, interstitial water, exchangeable, easily reducible (oxides of Mn), organic, moderately, reducible (oxides of Fe), and residual fractions. In addition, the cation exchange capacity (CEC) of the sediments was determined as well as the actual role of organics and colloidal iron coatings as they …

Mercury, Copper, And Zinc In Selected Ichthyofauna Of Lower Chesapeake Bay And Hampton Roads, Virginia, W. Bruce Aitenhead

OES Theses and Dissertations

Anchovys, croaker, spat, summer flounder and hogchokers were collected monthly to seasonally from November 1972 to October 1973 at three locations in the southern Chesapeake Bay region of Virginia.

The concentrations of mercury, copper and zinc were determined by atomic absorption spectrophotometry in whole fishes. Metal concentration varied with species and location. Anchovys had the highest mean concentrations of mercury and zinc while hog- chokers had the highest mean copper concentration. Mercury levels exceeding O.5 ppm were observed in species from all three loca- tions, but maximum heavy metal concentrations per species were highest in Craney Island fishes.

Temporal variations …

Values Of Dental Hygienists In Three Different Occupational Settings, Adele Cereghino Koot

Dental Hygiene Theses & Dissertations

This study investigated values of dental hygienists in three occupational settings: private practice, community practice, and higher education.

The Allport, Vernon, Lindzey Study of Values was used to measure values of all licensed dental hygienists in North Carolina employed in one of the three occupational settings.

An ex post facto 3x3x3x4x4 factorial research design was used. Occupational setting, age, year of graduation, educational level, and length of time in present position were the non-manipulated independent variables; and the Allport, Vernon, Lindzey Study of Values scores were used as dependent variables. Five-way analysis of variance revealed no significant value differences among …

Conservation According To The Pure Theory Of Exhaustible Resources, George Lymbouris

Economics Theses & Dissertations

The objective of this thesis is to develop a theory for defining optimal conservation and applying definition to the prevailing rate of domestic petroleum production. Optimal conservation is defined as action designed to achieve or to maintain, from the point of view of society as a whole, the maximum present value of natural resources (or of a natural resource). The proper "action" is defined according to the pure theory of exhaustible resources. The literature survey is a chronological series of articles concerning this theory.

Through building a model which shows that optimal conservation occurs when the marginal internal rate of …

The Response Of An Idealized Continental Shelf To Atmospheric Forcing, Paul Francis Moersdorf

OES Theses and Dissertations

The response of continental shelf water to cooling and wind stress is investigated using a two-dimensional numerical model. The topography of the east coast continental shelf was idealized by connecting a shallow (50 m) rectangular nearshore basin to a deeper (100 m) rectangular offshore basin. Numerous cases were examined using a wide range of values for both the air•sea temperature difference and the Wind speed, although the direction of the wind was always perpendicular to the coast.

The model predicts large excursions of shelf water offshore, and the subsequent surfacing of lower waters. Upwelling velocities of close to five meters …

The Photosynthetic Action Spectra Of The Phytoplankton And Their Role In Governing Spatial And Temporal Distribution: A Numerical Modeling Approach, William Morrow Willis

OES Theses and Dissertations

In the present study a numerical modeling approach is employed to examine the role of division spedific differences in photosynthetic action spectra in governing the relative size of diatom and dinoflagellate carbon synthesis along various marine light regime gradients. A radiative transfer model taking into account both Rayleigh and Mie atmospheric optical properties is employed to define the light regime incident on the sea surface. The hydrospheric light regime is defined by an exponential decay model with a correction for diffuse back scatter. Taken together, the atmospheric and hydrospheric models define the spectral composition and intensity of light in the …

Temperature And Time Dependent Viscosity Of An Elastomer Modified Epoxy Resin, Woodrow Williard Wagner Jr.

Mechanical & Aerospace Engineering Theses & Dissertations

Temperature effects on the viiscosity of an epoxy resin (diglycidyl ether of bisphenol A - DGEBA), an elastomer (carboxy terminated butadiene acrylonitrile - CTBN), and two blends containing nominally 10 percent elastomer were examined from strain rates of 0.1 sec^-1 to 10,000 sec-¹ over a temperature range from 300K to 450K. All results indicated the greatest drop in viscosity occurred for each of the materials over the temperature range of 300K to 350K. In addition, the materials exhibited Newtonian responses over the entire strain rate range, Adding small amounts of elastomer to the I epoxy only moderately effected …

Studies Of Fracture And Deformed Surfaces Of High Strength Aluminum Alloys By X-Ray Diffraction, Tamma K. Kumar

Mechanical & Aerospace Engineering Theses & Dissertations

X-ray observations of fatigue fracture and deformed surfaces of 7075-T6 aluminum were conducted in this study. The (111) and (222) diffraction peaks were obtained from the fractured and deformed surfaces. It was observed that in comparison with the base metal, the fracture exhibited line broadening similar to that due to cold working. The broadening is indicative of plastic deformation in the vicinity of the advancing crack tip during the fracture process. Also the different regions of fracture exhibited varying degrees of line broadening. With respect to the fatigue crack, the slow crack growth region showed a greater broadening, and, hence, …

Experiments In Attempted Interspecific And Interpopulational Hybridzation Of Grass Shrimp Of The Genus Palaemonetes (Caridea Palaemonidae), Mark Andrew Boston

OES Theses and Dissertations

The present study investigates the interfertility of Palaemonetes populations, Interspecific crosses were attempted between representatives of sympatric :populations of P. pugio, P. vulgaris, and P. intermedius, Intraspecific crosses were undertaken between geographically separated :populations of P. pugio. Laboratory conditions of 25°c, 25°/oo, and 14.5 hour photoperiod per day were maintained for all breeding attempts, Under these conditions interspecific hybridization of Palaemonetes pugio and P. vulgaris was not feasible. P. intermedius could not be hybridized with P. pugio and P. vulgaris. At 40 days of age P. pugio juveniles were significantly larger than P. vulgaris juveniles of …

Troubadour, 1978, Old Dominion University

Yearbooks

1978 yearbook of Old Dominion University

Freshman Record, 1978, Old Dominion University

Yearbooks

1978 issue of the Freshman Record of Old Dominion University

The Results Of Four Oceanographic Cruises In The Georgia Bight, L. P. Atkinson

CCPO Publications

During 1973 and 1974 we conducted four oceanographic cruises in the Georgia Bight with the purpose of gaining background seasonal data with which to plan more scientific experiments. In this technical report the data are presented in graphical form with interpretation. The data itself was published in two technical reports (Atkinson, 1975 and 1976). Some of the interpretations in this report will be given in more detail in published journal articles.

The Chemical And Biological Effect Of A Gulf Stream Intrusion Off St. Augustine, Florida, Larry P. Atkinson, Gustav-Adolf Paffenhöfer, William M. Dunstan

CCPO Publications

During a 3-day anchor station in shelf waters off St. Augustine, Florida we observed the effect of an intruding mass of deeper Gulf Stream water. The shelf waters were relatively low in nutrients and salinity while the Gulf Stream waters were high in salinity and nutrients. Onshore currents correlated with increases in nitrate and chlorophyll concentrations.

The advection of higher nutrient Gulf Stream water coincided with high chlorophyll (∼ mg chl a m⁻³) concentrations and dense populations of Phaeocystis pouchetii (up to 3.12 × 10°1⁻¹). Zooplankton sampling was impossible in the bottom layer because of the …

A Study To Determine Virginia Industrial Arts Teacher's Knowledge Of Terms Associated With The Metric System Of Measurement, Samuel P. Bowers

OTS Master's Level Projects & Papers

This problem was answered by focusing on the following questions: 1. Are Industrial Arts teachers in the state of Virginia ready to teach the metric system of measurement in their shops? 2. Do the Industrial Arts teachers in Virginia understand the common terms, their conversion to English, and prefixes associated with the metric system of measurement?