Physical Sciences and Mathematics Commons^™

Trajectories Of An Atomic Electron In A Magnetic Field, John B. Delos, Stephen Knudson, D. W. Noid

Arts & Sciences Articles

Classical trajectories of an atomic electron in a magnetic field are calculated for various values of the field strength B. Qualitative properties of these trajectories are examined. With use of a scaling law, it is shown that the equations of motion can be written in a form such that they depend upon only one parameter, which may be regarded as a reduced angular momentum (proportional to LzB13). For small values of this parameter there is an "elliptical regime" in which the trajectory may be regarded as a Kepler ellipse with orbital parameters that evolve slowly in time. For large values …

Summary Report On The Calibration Of The Water Quality Models Of The Chesapeake Bay System, H. S. Chen, Paul V. Hyer, Y. Unkulvasapaul, Bruce Neilson

Reports

The intended use of the water quality model was to predict the levels of important water quality parameters. in particular the dissolved oxygen levels and the algal populations. for alternative sets of nutrient loadings. The goals of the present modelling study were to apply appropriate models to the Chesapeake Bay system. to adjust the models so that they accurately simulated conditions in the prototype and to use those models to predict conditions under a number of nutrient loading scenarios. This report provides a summary of the work done to satisfy the first two of those three objectives.

Construction Of A Multidimensional Potential Energy Surface From An Energy Spectrum, Robert Leonard Waterland, John B. Delos

Arts & Sciences Articles

A method for the systematic construction of a multidimensional potential energy surface from an energy spectrum is presented. We show that if the Hamiltonian and the energy spectrum satisfy certain conditions then there is an inversion technique which gives a potential energy function from the spectrum. The method proceeds via a sequence of canonical transformations and leads to a potential energy which is symmetric in all its variables. We test the procedure for one‐ and two‐dimensional examples and show that it gives reasonable results. However, the method does not give a unique result and we discuss two types of nonuniqueness …

Electron Detachment In Negative-Ion Collisions. I. Time-Dependent Theory And Models For A Propagator, T. S. Wang, John B. Delos

Arts & Sciences Articles

A theory of electron detachment in slow collisions of negative ions with atoms is developed. The theory is based on assumptions that are similar to, but more general than, the assumptions made in earlier papers: The motion of the nuclei is described semiclassically, the electronic wave function is expanded in a partially diabatic basis that includes a discrete state and a continuum, and certain couplings are assumed to be small. With such assumptions the Schrödinger equation is reduced to a nondenumerably infinite set of coupled differential equations, and then to a single integro-differential equation (an equation with "memory"). It is …

Electron Detachment In Negative-Ion Collisions. Ii. The Dynamical Complex Potential, T. S. Wang, John B. Delos

Arts & Sciences Articles

No abstract provided.

Sea Grant College Designation Program, Virginia Institute Of Marine Science, School Of Marine Science, College Of William And Mary

Miscellaneous

October 25, 1984. The designation of the Virginia Sea Grant Program as the nation's twentieth National Sea Grant College Program in January 1984, recognized that the Sea Grant activities in Virginia were providing state and national leadership in the marine sciences and related fields.

Monthly Report On The State Of Rivers 1984, Albert Kuo

Reports

Chiefly graphs showing monthly salinity, temperature, dissolved oxygen distributions at slackwater for the James, York, Pamunkey, and Rappahannock Rivers.

1984: April, May, June, July, August, September, October

Atlas Of High Resolution Infrared Spectra Of Carbon Dioxide: February 1984 Edition, D. Chris Benner

Arts & Sciences Articles

Long-path, low-pressure laboratory absorption spectra of carbon dioxide i are presented in an atlas format for the spectral regions 1830 to 2100 cm" , 2395 to 2680 cm-I i , and 3140 to 3235 cm- . The data were recorded at 0.01 cm"I resolution and room temperature with the Fourier transform spectrometer in the McMath solar telescope complex of the National Solar Observatory at Kitt Peak. A list of positions and assignments is given for the 3336 lines observed. A total of 52 bands of 12C1602, 13C1602, 12C160180, 12C160170, and 13C160180 have been identified.

Lower Chesapeake Bay Surface Turbidity Variations As Detected From Landsat Images, Michael S. Fedosh

Dissertations, Theses, and Masters Projects

Landsat images are analyzed to investigate the causes of turbidity variations in lower Chesapeake Bay surface water. Visual analysis and image enhancement are used in association with optical film density data obtained along selected Bay transects. The optical density data of all images, inversely related to surface turbidity, are used to produce residual turbidity profiles showing turbidity above and below average conditions. meteorological conditions have Images with similar tidal or their residual optical density data averaged to identify probable causes of above average turbidity levels. Freshwater discharge does not directly contribute suspended sediment to Chesapeake Bay, except from the Potomac …

The Response Of Benthic Respiration To Nutrient Levels, Laurence E. Gadbois

Dissertations, Theses, and Masters Projects

No abstract provided.

Anatomical Observations On The Ampullae Of Lorenzini From Selected Skates And Galeoid Sharks Of The Western North, William Raschi

Dissertations, Theses, and Masters Projects

The gross structure of the ampullae of Lorenzini and its distribution on the body of 40 species of skates (Rajoidei) and 5 species of sharks (Galeomorphii) were compared in an attempt to investigate correlations within this system to feeding mechanisms. Three general lines of morphological change are observed. A larger proportion of the ampullary pores are associated with the ventral surface of the dorsoventrally flattened skates than the more conically shaped sharks. The relative proportion of ventral pores is significantly reduced on those species inhabiting aphotic waters. Secondly, the more piscivorous rajoids possess an array of ventral pores which covers …

Trace Organic Analyses Of Effluent Waters From A Model Slurry Pipeline Carrying Appalachian Bituminous Coal : Final Report, P. O. Defur, W. G. Macintyre

Reports

Effluent waters from a model coal slurry pipeline have been analyzed for trace dissolved organic compounds. The model pipeline was operated under conditions simulating those proposed for a slurry pipeline from the region of Bristol to Hampton Roads, Virginia. Acidic, neutral and basic organic compounds in the separated waters were determined. Concentrations of individual compounds detected were generally less than 0.5 ppb and never exceeded 6 ppb. Adsorption experiments using coal slurry sorbents indicate that coal particles act as sorbing surfaces under coal slurry pipeline transport conditions.

Final Report To The Coastal Erosion Abatement Commission, Commonwealth Of Virginia Concerning The Inventory Of Sand Supplies In The Southern Chesapeake Bay, Carl H. Hobbs Iii, Robert J. Byrne, Robert A. Gammish

Reports

This final report to the Coastal Erosion Abatement Commission concerning the inventory of sand supplies in the southern portion of Chesapeake Bay is a continuation of the work reported on in September 1981 (Byrne et al). The report includes technical appendices in addition to the general text.

Vegetative Erosion Control Project : Final Report, C. Scott Hardaway Jr., George Thomas, Andrew W. Zacherle, B. Keith Fowler

Reports

The Vegetative Erosion Control (VEC) project is a four-year study with coordinated efforts by the Virginia Soil and Water Conservation Commmission (VS&WCC) through their Shoreline Erosion Advisory Service (SEAS), the Soil Conservation Service (SCS) and the Virginia Institute of Marine Science (VIMS). Initial funding was appropriated in 1980 following the recommendation of the Coastal Erosion Abatement Commission and contracted out to the SCS and VIMS by the VS&WCC, the lead agency. (...)

The purpose of the VEC project is to supplement previous research with detailed site analysis of the early stages of marsh development and to more precisely define the …

Virginia Institute Of Marine Science Plan In Support Of The Chesapeake Bay Research And Submerged Aquatic Vegetation Initiatives Of The Commonwealth Of Virginia, Virginia Institute Of Marine Science

Reports

No abstract provided.

A Study Of Long-Term Environmental Fluctuations In The Chesapeake Bay Region, Reidar S. Leinebo, David A. Evans

Reports

A time series of monthly mean values of temperature measurements (1952-1981) for Gloucester Point, Virginia, U.S.A. and Vardo In Northern Norway are described and the results of an eigenfunction analysis are presented. Seasonal, year-to-year and long term changes of salinlty measurements (1960-1977) for Gloucester Point and monthly mean stream-flow values (1951-1982) are also described. Commerclal Catch data from Virginia for menhaden, bluefish and Atlantic croaker shows reasonable correlation with cllmatlc changes.

The time around 1965 was a cold period with high sallnlty and low streamflow. The same period was also cold In Northern Norway (Europe). Around 1974 was a period …

Kepone Uptake: A Comparison Of Field And Laboratory Data, Micheal E. Bender, Robert J. Huggett, Harold D. Sloane

VIMS Books and Book Chapters

The ability to predict the environmental fate and effects of pollutants in the marine environmenits of utmost importance in assessing the hazards posed by a compound's use and/or disposal. Most commonly utilized methods to establish potential environmental effects have involved an assessment with bioassays of a compound's acute and chronic toxicity. For compounds that have the ability to bioaccumulate, the potential dangers from this process must also be determined. A "first cut" estimate can be made by determining the partition coefficients between an organic solvent, usually n-octanol, and water. If this coefficient exceeds 25,000, EPA requires a report of the …

Antibody Production In Spot (Leiostomus Xanthurus Lacepede): A Model To Test The Impact Of Elizabeth River Sediments On The Humoral Immune System Of Fish, Catherine Nancy Pourreau

Dissertations, Theses, and Masters Projects

No abstract provided.

The Distribution And Abundance Of The Bottlenose Dolphin, Tursiops Truncatus In Virginia, Robert A. Blaylock

Dissertations, Theses, and Masters Projects

No abstract provided.

A Method For Evaluating The Long-Term, Cumulative Impacts Of Tidal Marsh Alterations: The York River System, A Case Study, Andrew W. Zacherle

Dissertations, Theses, and Masters Projects

No abstract provided.

Nanoplankton Dynamics In A Salt Marsh-Mudflat Ecosystem, Helena Maria Galvaeo

Dissertations, Theses, and Masters Projects

No abstract provided.

Non-Tidal Sea Level Variations Across The Lower Chesapeake Bay, Richard Leo Garfield

Dissertations, Theses, and Masters Projects

No abstract provided.

Electron Detachment In Negative Ion-Molecule Collisions, Mohammed Saiful Huq

Dissertations, Theses, and Masters Projects

Absolute total cross sections for electron detachment, reactive scattering, charge transfer and dissociative charge transfer have been measured for collisions of hydrogen and halogen negative ions with various molecular targets. The reactants investigated involve H('-), D('-), F('-), Cl('-), Br('-) and I('-) ions as projectiles and H(,2), D(,2), HD, N(,2), CO, O(,2), CO(,2), CH(,4) and Cl(,2) molecules as targets. The energy range of these experiments extended from about 1 eV to about 300 eV in the lab.;The threshold behavior of the detachment cross sections for the reactants H('-)(D('-)) + H(,2),D(,2) and HD has been determined. The thresholds for detachment for both …

Solvolysis Of 2-Buten-2-Yl Triflates, Michael M. Mellis

Dissertations, Theses, and Masters Projects

No abstract provided.

Resin Acid Compounds In A Kraft Pulp And Paper Mill Effluent And Their Distribution In Bottom Sediments Near The Outfall, Manida Unkulvasapaul

Dissertations, Theses, and Masters Projects

Kraft pulp and paper mill effluents (KPPME) collected on three occasions were analyzed for resin acids, aliphatic hydrocarbons, and aromatic hydrocarbons. The maximum total concentrations of these compounds found in secondary effluents were 8 mg/L resin acids, 4.0 mg/L resolved aliphatic hydrocarbons, and 0.2 mg/L resolved aromatic hydrocarbons. Abietic acid and dehydroabietic acid were the two major components in resin acid fractions and were responsible for > 70% of the total concentration. Analyses of estuarine water and sediments collected from the outfall and nearby areas showed that dehydroabietic acid was the major resin acid in either water or sediment. Concentrations of …

Oyster Spatfall In Virginia Rivers: 1983 Annual Summary, James Whitcomb

Reports

The Virginia Institute of Marine Science (VIMS) conducts weekly surveys from June through early October to obtain oyster spatfall information. Spat counts are made on oyster shells strung on wire and suspended from stakes on public and private beds. The number of spat on shells are counted each week of ~:he spawning season to determine the potential of a particular area for receiving a strike and to predict the most likely period tile strikes will occur. A moderate or heavy strike on shellstrings usually indicates a significant strike on exposed bottom clutch. This is especially true for clutch planted a …

Electrophoretic Stock Identification Of Summer Flounder, Paralichthys Dentatus, Garret Van Housen

Dissertations, Theses, and Masters Projects

No abstract provided.

Geologic Responses To Late Cenozoic Marine Transgressions In The Poropotank River Estuary, Virginia, Martin Lane Mitchell

Dissertations, Theses, and Masters Projects

No abstract provided.

Synthesis Of 2-Alkylidene-1,3-Cyclohexanediones, Mary Virginia Manson

Dissertations, Theses, and Masters Projects

No abstract provided.

Synthesis And Characterization Of Some Oxoperoxopolycarboxylato Vanadates (V) And Their Biochemical Significance, Myunghi Lee

Dissertations, Theses, and Masters Projects

No abstract provided.