Physical Sciences and Mathematics Commons^™

Salt Water Plasma Model Of The Venus Atmosphere, Eueng-Nan Yeh

Dissertations, Theses, and Masters Projects

No abstract provided.

Model Legislation For The Administration Of Subaqueous Hard Mineral Resources Within Virginia Waters, William Jeffery Wardrop

Dissertations, Theses, and Masters Projects

No abstract provided.

Retention And Escapement Characteristics Of Pound Nets As A Function Of Pound-Head Mesh Size, Henry Louis Meyer

Dissertations, Theses, and Masters Projects

No abstract provided.

New Approaches To The Study Of The Circulation On The Continental Shelf, Paul V. Hyer

Reports

The current state of knowledge of continental shelf circulation is summarized . Existing data collections are reviewed for quality and quantity. Descriptions are given of possible advanced experiments utilizing remote sensing and buoy technology to study water exchanges between the shelf and Gulf Stream.

Bathymetry Of The Chesapeake Bay, Victor Goldsmith, Carolyn H. Sutton

Reports

Coordinates: W 77⁰30ʹ--W 75⁰30ʹ/N 39⁰30ʹ--N 37⁰.

Bathymetry based on depths from National Ocean Survey sounding sheets, contoured to mean low water datum.

Scale 1:224,700 at 37⁰ latitude.

Original chart size 141x80cm. | 55.5x31.5inches

Bathymetric Chart Series No. 2.

A Report On Salinity And Oxygen Values In The Great Wicomico River In 1971 And L972 With Comments On The Low Set, Dexter Haven

Reports

Our studies in the Great Wicomico River showed that in 1971°':·oystefr larvae did not strike during early July in the usual number. In looking for a reason, we began to take samples for dissolved oxygen beginning on 12 July 1971. · Our studies showed that DO was low at the bottom from at least 12 July to 27 July. Salinity, according to limited data, ,~ appeared about average for the· season. (...)

Relative Growth, Reproduction And Distribution Of The Rock Crab, Cancer Irroratus, In Chesapeake Bay During The Winter, Roy Tim Terretta

Dissertations, Theses, and Masters Projects

No abstract provided.

The Effects Of Intrinsic And Environmental Factors On The Oxygen Consumption Of The Blue Crab, Callinectes Sapidus Rathbun, Chae E. Laird

Dissertations, Theses, and Masters Projects

No abstract provided.

Nuclear Magnetic Resonance In The Amorphous Transition Metal Vzr Alloy, Kwang Soo Han

Dissertations, Theses, and Masters Projects

No abstract provided.

Inner Shelf Sediments Off Chesapeake Bay. Iii, Heavy Minerals, Bruce K. Goodwin, John B. Thomas

Reports

The heavy minerals in the sand sized fraction of 112 grab samples collected off the Virginia coast were analyzed for their variations in mineralogy. The main purpose was to characterize the heavy mineral suite and to delineate potentially important economic areas.

Marine And Estuarine Sanctuaries - Proceedings, National Workshop On Sanctuaries (Washington, D.C.)

Reports

No abstract provided.

Oyster Spatfall On Shellstrings In Virginia Rivers: 1972 Annual Summary, Virginia Institute Of Marine Science

Reports

Oyster setting in Virginia river systems dipped to the lowest levels on record during 1972, according to scientists at the Virginia Institute of Marine Science who regularly monitor oyster grounds for set. A heavy set occurred on the seaside of Virginia's Eastern Shore and limited setting was observed in tributary rivers of the Mobjack Bay, but elsewhere the number of oysters setting on shellstrings and on the bottom in lower Chesapeake Bay in 1972 was far lower than for the previous year, and the lowest overall set ever recorded.

Ecological Survey, Upper James River, Surry Nuclear Power Station Site, July 1973, Michael E. Bender, Marion Y. Hedgepeth, Et Al

Reports

Beginning in Hay of 1969 field surveys have been conducted in the Hog Island area of the James River to characterize the biota of the region. The objective of these surveys has been to determine any significant changes in the biota related to the operation of the nuclear power station. Although during the period of study, methods and stations have been changed to adjust the study to changing regulations, its basic character has remained. Communities surveyed have included benthos, epibenthos, zoo- and phytoplankton, fish, and fouling organisms. In addition, special studies of thermal tolerance have been conducted on oysters and …

Geostrophic Currents And Gulf Stream Study For The Outer Continental Shelf Area Of The Atlantic Ocean From Sandy Hook, New Jersey To Cape Canaveral, Florida, Christoper S. Welch

Reports

This document is being prepared for the Council on Environmental Quality (CEQ) as a portion of the Virginia Institute of Marine Science (VIMS) response to the geostrophic current estimate portion of task 1 and task 5 of the contract. It consists of an estimate of mean geostrophic currents on the continental shelf of the East Coast of the United States between Sandy Hook, New Jersey and latitude 27°N. Also included is a surmmary of speeds of surface current in the Gulf Stream east of the area of interest.

In addition, the method of estimation for geostrophic currents is described and …

Studies Of The Potential Curve Crossing Problem Ii. General Theory And A Model For Close Crossings, John B. Delos, W. R. Thorson

Arts & Sciences Articles

A unified formal treatment of the two-state potential-curve-crossing problem in atomic collision theory is presented, and the case of close crossings analyzed in detail. A complete solution for this case, including necessary computations, is given using a suitable generalization of the linear model originally suggested by Landau, Zener, and Stueckelberg. Our solution is based upon a hierarchy of approximations concerned with (i) choice of a discrete basis set for electronic coordinates, (ii) semiclassical treatment of the nuclear motion, (iii) an appropriate model for the two-state electronic Hamiltonian, and (iv) a complete solution to that model.

Semiclassical Theory Of Inelastic Collisions Ii. Momentum Space Formulation, John B. Delos, Walter R. Thorson

Arts & Sciences Articles

The time-dependent equations of the classical picture of inelastic collisions (classical-trajectory equations) are derived using the momentum-space semiclassical approximation. Thereby it is shown that the classical-trajectory equations remain valid in the vicinity of classical turning points provided that (a) the momentum-space semiclassical approximation is valid, (b) the trajectories for elastic scattering in the various internal states differ only slightly, and (c) the slopes of the elastic scattering potentials have the same sign. A brief review of the existing derivations of the classical-trajectory equations is given, and the general conditions for their validity are discussed.

Physical And Geological Studies Of The Proposed Bridge-Tunnel Crossing Of Hampton Roads Near Craney Island, C. S. Fang, B. J. Neilson, A. Y. Kuo, R. J. Byrne, C. S. Welch

Reports

Part 1: James River Hydraulic Model Tests

Part 2: Impact on Shoreline, Hampton Flats and Newport News Point Area

Part 3: Drogue Study, Hampton Flats and Newport News Point

Part 4: Hydraulic Model Test Results

Semiclassical Theory Of Inelastic Collisions I. Classical Picture And Semiclassical, John B. Delos, W. R. Thorson, Stephen Knudson

Arts & Sciences Articles

This series of papers is concerned with the derivation of the equations of the classical picture of atomic collisions, iℏddtdi(t)=Σjhij(t)dj(t), which describe the "time" dependence of electronic-quantum-state amplitudes as the nuclei move along a classical trajectory. These equations are derived in two ways. In the first formulation, which coincides with the intuitive classical picture of the collision, the nuclear part of the wave function is treated as a superposition of narrow wave packets, each traveling along a classical trajectory. In the second formulation, a semiclassical approach is used. The validity and meaning of the two formulations are discussed and compared.

Oceanographic Data Collected In The Chesapeake Bight Of The Virginian Sea From 1966 Though 1969, E. P. Ruzecki, J. J. Norcross, F. J. Wojcik

Reports

This report is intended to make unsynthesized oceanographic data readily available to the scientific community. 3 Similar reports are envisioned which will include physical, chemical, biological and geological data collected by personnel of the Virginia Institute ·of Marine Science in areas of the continental shelf, and coastal zone to include beaches, wetlands, estuaries and tidal rivers - areas in which the Commonwealth of Virginia has a vested interest.

Instructions For Using Oceanography Form 1 (Virginia Institute Of Marine Science Hydrographic Data Form), Richard W. Moncure

Reports

Instructions for coding oceanographic data on Form 1.

Solutions Of The Two-State Potential-Curve-Crossing Problem, John B. Delos, W. R. Thorson

Arts & Sciences Articles

A general theory of the two-state curve-crossing problem has been developed, with a complete solution of an accurate model for "close" crossings (including numerical computations for strong coupling). Results clarify the position of the Landau-Zener approximation and its improvements by Nikitin and others, provide a general way of extending these approximations into regions often treated incorrectly (including the high-energy limit), and can be readily adapted to simple, rapid calculations.

Data Report: Operation York River, 1969, P. V. Hyer, E. P. Ruzecki, C. S. Fang

Reports

A field survey was carried out in October 1969 to gather field data from the Mattaponi, Pamunkey and York rivers in order to construct mathematical models for salinity and dissolved oxygen. The results of the field operation are presented, together with a description of the methods and instruments used in the data collection and analysis.

Study Of Channel Sediments, Baltimore Harbor, Norfolk Harbor, York Entrance Channel, R. J. Huggett

Reports

3ot~om sediment samples were collected from seven channel locations in the Chesapeake Bay and communicating river systems. The sampling format involved. long cores (designated "L") taken at two nautical mile intervals and surface samples (designated "S) taken at one-half mile intervals.

Heavy Metals - An Inventory Of Existing Conditions, M. E. Bender, R. J. Huggett, H. D. Slone

VIMS Articles

In this paper we report on studies undertaken to: (1) establish 1nercury levels in biota and sediments from the lower portion of Chesapeake Bay; (2) describe the pattern of metal distribution in oysters from 3 Virginia estuaries; and (3) determine if estuarine sediments can be used to detect the effects of man's activities on the environn1e nt. To date, mercury analyses of biota from the Bay area have sho\vn no levels in excess of FDA guidelines, nor have they indicated any influence of man's activities in the areas studies. Oysters have been shown to vary naturally in their body burdens …

Groundwater Flow In A Sandy Tidal Beach 2. Two-Dimensional Finite Element Analysis., C. S. Fang, S. N. Wang, W. Harrison

VIMS Articles

Two-dimensional finite element techniques are described that model closely the complicated fluctuations osbserved in the water table of an ocean beach. The use of triangular elements permits the specification of more realistic boundary conditions than the use of line elements in a one-dimensional model. Also, results obtained from the two-dimensional model for the region closet o the ocean compare more favorably with field data than results obtained from the one-dimensional finite element model.

Bahamas Bibliography : A List Of Citations For Scientific, Engineering And Historical Articles Pertaining To The Bahama Islands, Carol Fang, W. Harrison

Reports

Specialized bibliographies are sometimes needed in connection with the research studies being pursued at the Virginia Institute of Marine Science. The Bahamas Bibliography arose out of the needs of marine geologists, biologists and physical oceanographers engaged in studies of beaches, fishes and inlet currents in the Bahama Islands. Although the present bibliography may suffer from completeness, it significantly surpasses in number of citations the only other known bibliography of like kind.

Effect Of Increasing Depth On Salinity In The James River Estuary, Maynard M. Nichols

VIMS Books and Book Chapters

The effects of channel deepening on the salinity and density flow in the James River estuary, Virginia, were studied to predict changes that might affect oyster production. A hydraulic model with 1: 1,000 horizontal and l: 100 vertical scales was employed to integrate three-dimensional changes in salinity and velocity through reaches of variable bottom geometry. After natural characteristics of the tide, current, and salinity were reproduced in the model, tests were run at three levels of steady river inflow, before and after a 3-meter channel deepening. Results were combined with corollary field observations to evaluate changes in present-day ecological conditions. …

Sediments Of The James River Estuary, Virginia, Maynard M. Nichols

VIMS Books and Book Chapters

The James River estuary of the Chesapeake Bay region follows the course of a former river valley drowned within the last 9,000 years by the most recent rise of sea level. The floor is shaped into a central channel bordered by submerged shoals. Observations show suspended sediment is transported mainly by alternating tidal currents and secondarily by the net nontidal estuarine circulation. Transport results in a sequence of grain size distributions reflecting the mixing of two textural end members, clay and sand.

Silty clay is deposited in the river and upper estuary, whereas sand occurs near the mouth. Transitional types, …

Agricultural And Urban Pollution, Morris L. Brehmer

VIMS Books and Book Chapters

I have modified the scope of this paper slightly to include urban pollution because the pollution problems produced by the agricultural industry are essentially the same as those produced by municipalities. We know that environmental degradation occurs as a result of the discharge and the byproducts from both sources.

In the case of agricultural activities, the terrain has and still is being modified to convert it to crop production. In the livestock industry, large populations of animals are being concentrated into relatively small areas to meet the economic pressures of meat production. With the human population, the numbers of people …

Engineering Works And The Tidal Chesapeake, William J. Hargis Jr.

VIMS Books and Book Chapters

This paper discusses the tidal tributaries of the ocean and the coastal areas of the mid-Atlantic Bight and the ecological significance of engineering projects. While occasional reference may be made in this paper to remote sensing of problems engendered by engineering works on maritime environments and resources, principal efforts along those Jines are reserved for the group discussion to follow.

The Chesapeake Bay drainage basin_encompasses.almost 65,000 miles and provides space and partial resources for over 11 million people ( 1960) in New York, Pennsylvania, Maryland, Virginia, and the District of Columbia. Two other states, Delaware and West Virginia, to a …