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Articles 4111 - 4140 of 4602
Full-Text Articles in Physical Sciences and Mathematics
The Development Of An Operating System For The Microdata 32/S, George Edward Butler
The Development Of An Operating System For The Microdata 32/S, George Edward Butler
Dissertations, Theses, and Masters Projects
No abstract provided.
A Survey Of The Late Summer Benthos Community In The Vicinity Of The C. P. Crane Generating Station, Robert A. Jordan, Charles E. Sutton, Patrica A. Goodwin
A Survey Of The Late Summer Benthos Community In The Vicinity Of The C. P. Crane Generating Station, Robert A. Jordan, Charles E. Sutton, Patrica A. Goodwin
Reports
A survey of the sediment distribution in the vicinity of the C. P. Crane Generating Station, Bengies, Maryland showed that the sediments in the creeks receiving the plant's cooling water discharge were predominantly soft clayey-silt. The benthic invertebrate taxa found in these sediments were typical of the connnunities found in oligohaline waters of Chesapeake Bay. Comparisons of the benthic community in the discharge area with the connnunities in two reference areas of similar sediment type revealed an apparent reduction in the discharge area population of the dominant amphipod, Leptocheirus plumulosus, in August.
Middle Atlantic Outer Continental Shelf Environmental Studies Volume Iii: Geologic Studies, Harley J. Knebel, Et Al
Middle Atlantic Outer Continental Shelf Environmental Studies Volume Iii: Geologic Studies, Harley J. Knebel, Et Al
Reports
The Middle Atlantic Outer Continental Shelf Environmental Studies is comprised of three volumes.
- Volume I. Executive Summary.
- Volume IIA, IIB, IIC and IID. Chemical and Biological Benchmark Studies.
- Volume III. Geologic Studies.
This third volume in the study contains the following:
- CHAPTER 1. INTRODUCTION by Harley J. Knebel
- CHAPTER 2. BOTTOM CURRENTS AND BOTTOM SEDIMENT MOBILITY IN THE OFFSHORE MIDDLE ATLANTIC BIGHT, 1976-1977 by Bradford Butman and Marlene Noble
- CHAPTER 3. SESTON IN MIDDLE ATLANTIC SHELF AND SLOPE WATERS 1976-1977 by John D. Milliman, Michael H. Bothner, and Carol M. Parmenter
- CHAPTER 4. SUBMERSIBLE OBSERVATIONS …
Oyster Spatfall On Shellstrings In Virginia Rivers: 1978 Annual Summary, Dexter S. Haven, Paul C. Kendall
Oyster Spatfall On Shellstrings In Virginia Rivers: 1978 Annual Summary, Dexter S. Haven, Paul C. Kendall
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 from 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 the spawning season to determine the potential of a particular area for receiving a strike and to predict the most likely period the strikes will occur. Shells planted just before the period of maximum set have the best chance of getting a good strike.
Estuarine Fluid Mud : Its Behavior And Accumulation, Maynard M. Nichols, Richard Faas, Galen Thompson
Estuarine Fluid Mud : Its Behavior And Accumulation, Maynard M. Nichols, Richard Faas, Galen Thompson
Reports
A study of fluid mud in Virginia estuaries was conducted to determine how the mud accumulates in a dynamic tidal flow regime. The mud occurs as lenses and blanket deposits in zones of fast sedimentation, i.e. on channel floors and in the turbidity maximum zone. Viscosity measurements indicate resuspension potential of the mud is greater in the turbidity maximum than elsewhere.
Box Core Liner System For Fluid Mud, Craig Lukin, Maynard M. Nichols
Box Core Liner System For Fluid Mud, Craig Lukin, Maynard M. Nichols
Reports
No abstract provided.
Hydrography And Hydrodynamics Of Virginia Estuaries. Xvii, Mathematical Ecosystem Modeling Study Of The York River, P. V. Hyer, A. Y. Kuo, C. S. Fang, W. J. Hargis Jr.
Hydrography And Hydrodynamics Of Virginia Estuaries. Xvii, Mathematical Ecosystem Modeling Study Of The York River, P. V. Hyer, A. Y. Kuo, C. S. Fang, W. J. Hargis Jr.
Reports
The York River drainage basin is rural, with an economy based on farming, logging, fishing and recreation. Water quality conditions are generally good, with low chlorophyll and nutrients and low fecal coliform counts. Dissolved oxygen concentrations are high except for periodic deoxygenation of the water deeper than 8 m in the reach extending 10 km upstream of the mouth.
A quasi-three dimensional tidal average model was constructed and calibrated using intensive field data collected in June and July, 1976 and verified using slack water run data from September, 1976. The model components are: salinity, fecal coliform, chlorophyll, CBOD, dissolved oxygen, …
Chesapeake Bay Baseline Data Acquisition Appendix Ix: Wetlands Alteration, Chesapeake Research Consortium, Incorporated, University Of Maryland, Center For Environmental And Estuarine Studies, Virginia Institute Of Marine Science
Chesapeake Bay Baseline Data Acquisition Appendix Ix: Wetlands Alteration, Chesapeake Research Consortium, Incorporated, University Of Maryland, Center For Environmental And Estuarine Studies, Virginia Institute Of Marine Science
Reports
No abstract provided.
Chesapeake Bay Baseline Data Acquisition Appendix X: Effects Of Boating And Shipping On Water Quality, Chesapeake Research Consortium, Incorporated, University Of Maryland, Center For Environmental And Estuarine Studies, Virginia Institute Of Marine Science
Chesapeake Bay Baseline Data Acquisition Appendix X: Effects Of Boating And Shipping On Water Quality, Chesapeake Research Consortium, Incorporated, University Of Maryland, Center For Environmental And Estuarine Studies, Virginia Institute Of Marine Science
Reports
No abstract provided.
Chesapeake Bay Baseline Data Acquisition Appendix Xi: Shoreline Erosion, Chesapeake Bay Research Consortium, Incorporated, University Of Maryland, Center For Environmental And Estuarine Studies, Virginia Institute Of Marine Science
Chesapeake Bay Baseline Data Acquisition Appendix Xi: Shoreline Erosion, Chesapeake Bay Research Consortium, Incorporated, University Of Maryland, Center For Environmental And Estuarine Studies, Virginia Institute Of Marine Science
Reports
No abstract provided.
Chesapeake Bay Baseline Data Acquisition: Final Report, Maurice P. Lynch, Andrew J. Mcerlean, Chesapeake Research Consortium, Incorporated
Chesapeake Bay Baseline Data Acquisition: Final Report, Maurice P. Lynch, Andrew J. Mcerlean, Chesapeake Research Consortium, Incorporated
Reports
This report forms one of several appendices which are the body of
the Chesapeake Bay Baseline Data Acquisition Final Report. These
appendices are as follows:
Appendix I. A Chesapeake Bay Directory
Appendix II. Submerged Aquatic Vegetation
Appendix III. Toxics in the Chesapeake Bay
Appendix V. Shellfish Bed Closures
Appendix VI. Dredging and Spoil Disposal
Appendix VII. Modification of Fisheries
Appendix VIII. Hydrologic Modifications
Appendix IX. Wetlands Alteration
Appendix X. Effects of Boating and Shipping on Water Quality
Appendix XI. Shoreline Erosion
Plant Geography And Water Quality Data For Chesapeake Bay Waters Of Virginia's Eastern Shore, John C. Munday Jr., Paul L. Zubkoff, J. Ernest Warinner Iii, Elvira Ferrez-Reyes, Hayden H. Gordon, Kenneth A. Moore
Plant Geography And Water Quality Data For Chesapeake Bay Waters Of Virginia's Eastern Shore, John C. Munday Jr., Paul L. Zubkoff, J. Ernest Warinner Iii, Elvira Ferrez-Reyes, Hayden H. Gordon, Kenneth A. Moore
Reports
Plant geography and water quality data were collected in shallow water near Cape Charles and Occohannock Creek, Virginia on two occasions. Data from April, 1978 included hydrography, distribution and abundance of -submerged aquatic vegetation, phytoplankton census, and water clarity data. Data from May, 1978 included hydrography, phytoplankton census, water clarity, and primary productivity data. The May data collection was coincident with an overflight of the NASA JSC C-130 aircraft (6600 m) acquiring color infrared photography and multispectral scanner data; cell concentrations reached 105/ml, chlorophyll~ 72 pg/1, and suspended sediment 94 mg/1. i
Chesapeake Bay Baseline Data Acquisition Appendix Viii: Hydrologic Modifications, Chesapeake Research Consortium, Incorporated, University Of Maryland, Center For Environmental And Estuarine Studies, Virginia Institute Of Marine Science
Chesapeake Bay Baseline Data Acquisition Appendix Viii: Hydrologic Modifications, Chesapeake Research Consortium, Incorporated, University Of Maryland, Center For Environmental And Estuarine Studies, Virginia Institute Of Marine Science
Reports
No abstract provided.
Chesapeake Bay Baseline Data Acquisition Appendix Iv Eutrophication, Chesapeake Research Consortium, Incorporated, University Of Maryland, Center For Environmental And Estuarine Studies, Virginia Institute Of Marine Science
Chesapeake Bay Baseline Data Acquisition Appendix Iv Eutrophication, Chesapeake Research Consortium, Incorporated, University Of Maryland, Center For Environmental And Estuarine Studies, Virginia Institute Of Marine Science
Reports
No abstract provided.
Chesapeake Bay Baseline Data Acquisition Appendix Vi: Dredging And Spoil Disposal, Chesapeake Research Consortium, Incorporated, University Of Maryland, Center For Environmental And Estuarine Studies, Virginia Institute Of Marine Science
Chesapeake Bay Baseline Data Acquisition Appendix Vi: Dredging And Spoil Disposal, Chesapeake Research Consortium, Incorporated, University Of Maryland, Center For Environmental And Estuarine Studies, Virginia Institute Of Marine Science
Reports
No abstract provided.
Theory Of Near-Adiabatic Collisions. Ii. Scattering Coordinate Method, W. R. Thorson, John B. Delos
Theory Of Near-Adiabatic Collisions. Ii. Scattering Coordinate Method, W. R. Thorson, John B. Delos
Arts & Sciences Articles
A rigorously correct and fully quantum-mechanical theory of slow atomic collisions is presented, which removes the formal defects and spurious nonadiabatic couplings of perturbed-stationary-states theory, and arrives at coupled equations for the heavy-particle motion which are the same as those obtained in the preceding paper by the electron translation factor formulation. Here, however, the theory is formulated in terms of suitably defined scattering coordinates, and electron translation factors do not appear. A unified physical interpretation of both approaches can thereby be made, and smaller terms in the coupled equations, describing corrections of order mμ to electronic binding energies and to …
Theory Of Near-Adiabatic Collisions. I. Electron-Translation-Factor Method, W. R. Thorson, John B. Delos
Theory Of Near-Adiabatic Collisions. I. Electron-Translation-Factor Method, W. R. Thorson, John B. Delos
Arts & Sciences Articles
The theory of near-adiabatic collisions is formulated in a fully quantum-mechanical form, correctly taking into account the role of electron translation factors (ETF's). A general form for the ETF, using switching functions, is given for systems which are electrically either asymmetric or symmetric (with or without mass asymmetry). The main result is that the close-coupled scattering equations obtained in the perturbed-stationary-states theory must be replaced by equations of identical form, but having modified nonadiabatic coupling matrices. In general, the corrections involved are substantial; their nature, and effect on coupling matrices, is discussed, and conditions when they are likely to …
Chesapeake Bay Baseline Data Acquisition Appendix Ii: Submerged Aquatic Vegetation Report, Chesapeake Research Consortium, Incorporated, Virginia Institute Of Marine Science, University Of Maryland, Center For Environmental And Estuarine Studies
Chesapeake Bay Baseline Data Acquisition Appendix Ii: Submerged Aquatic Vegetation Report, Chesapeake Research Consortium, Incorporated, Virginia Institute Of Marine Science, University Of Maryland, Center For Environmental And Estuarine Studies
Reports
No abstract provided.
Chesapeake Bay Baseline Data Acquisition Appendix I: A Chesapeake Bay Directory, Chesapeake Research Consortium, Incorporated
Chesapeake Bay Baseline Data Acquisition Appendix I: A Chesapeake Bay Directory, Chesapeake Research Consortium, Incorporated
Reports
This directory is the updated version of the Mitre Corporation directory compiled in September 1976 for the staff of the Chesapeake Bay Program, Region III, Environmental Protection Agency. It identifies, by name, address, and telephone number, academic researchers, administrators, institutions, agencies, interest groups, consulting organizations, and other entities concerned with the water quality of the Chesapeake Bay and related water matters. It is current as of February 1978 and should be revised periodically to incorporate changes in personnel and organization structure.
Guidelines For Zooplankton Sampling In Quantitative Baseline And Monitoring Programs, Fred Jacobs, George C. Grant
Guidelines For Zooplankton Sampling In Quantitative Baseline And Monitoring Programs, Fred Jacobs, George C. Grant
Reports
Methods applicable to zooplankton sampling and analysis in quantitative baseline and monitoring surveys are evaluated and summarized. Specific recommendations by managers must take into account characteristics of the water mass under investigation, the abundance of contained zooplankton and phytoplankton populations and the objectives of the study. Realistic planning and development must also consider available monetary and manpower resources.
Modeling Sediment Movement In The Turbidity Maximum Of An Estuary, Allbert Kuo, Maynard M. Nichols, James Lewis
Modeling Sediment Movement In The Turbidity Maximum Of An Estuary, Allbert Kuo, Maynard M. Nichols, James Lewis
Books
This research developed a two-dimensional, time-dependent numerical model to simulate the movement of water and suspended sediment in the turbidity maximum of an estuary. This model is a systematic sequence of mathematical procedures derived from the mass-balance equation and the equation of motion. Lateral integration is used to obtain two-dimensional equations; these equations are integrated with depth over the height of successive layers. Finite difference equations then are written for each layer and solved numerically using prescribed boundary conditions.
Numerical Experiments With The Multi-Grid Method, Theodore Craig Poling
Numerical Experiments With The Multi-Grid Method, Theodore Craig Poling
Dissertations, Theses, and Masters Projects
No abstract provided.
Final Report On Environmental Effect Of Subaqueous Sand Fill Acquisition On The Benthic Communities Of Hampton Bar, James River, Virginia, Robert J. Diaz, Donald F. Boesch
Final Report On Environmental Effect Of Subaqueous Sand Fill Acquisition On The Benthic Communities Of Hampton Bar, James River, Virginia, Robert J. Diaz, Donald F. Boesch
Reports
The Newport News Shipbuilding and Drydock Company was granted permission to obtain sand fill from the east end of Hampton Basin Hampton Roads, Virginia for the expansion of their waterfront facilities. A clamshell dredge operated from February to July 1974 and removed a total of 597,055 cu yds of material before breaking down. In August 1974 a hydraulic dredge took over the operation and by February 1975 had removed 899,386 cu yds for total removal of 1,495,410 cu yds.
In order to assess the environmental effects of this project a program of sampling benthic organisms was undertaken from February 1974 …
Oyster Spatfall On Shellstrings In Virginia Rivers: 1977 Annual Summary, Dexter S. Haven, Paul C. Kendall
Oyster Spatfall On Shellstrings In Virginia Rivers: 1977 Annual Summary, Dexter S. Haven, Paul C. Kendall
Reports
No abstract provided.
Evaluation Of Salinity And Temperature As Stress Factors Affecting The Enumeration Of Fecal Coliforms By The Electrochemical Detection Method, Howard I. Kator, Martha W. Rhodes
Evaluation Of Salinity And Temperature As Stress Factors Affecting The Enumeration Of Fecal Coliforms By The Electrochemical Detection Method, Howard I. Kator, Martha W. Rhodes
Reports
The ability of an electrochemical detection method to predict viable numbers of fecal coliforms was evaluated under laboratory conditions with respect to seawater adjusted to various salinities and temperatures. The viability of an Escherchia coli isolat~ as measured by the spread plate technique utilizing non-selective media was unaffected after 12 wk exposure at 2°C and 25 °100 salinity. At higher temperatures (15-30°C) both the total decrease in cell numbers as well as the rates of die-off were greater than at 2°C. There was little apparent difference in viability across the temperature range 15-30°C. Viability was observed to be inversely related …
Depuration Of Kepone By Atlantic Croaker In A Laboratory Study, Robert T. Doyle, J. V. Merriner, M. E. Bender
Depuration Of Kepone By Atlantic Croaker In A Laboratory Study, Robert T. Doyle, J. V. Merriner, M. E. Bender
VIMS Books and Book Chapters
Contamination of the James River in Virginia by the organochlorine pesticide Kepone R prompted depuration studies of commercially important species. Approximately 400 croaker (Micropogonias undulatus) were taken from the James River and placed in Kepone-free York River water. Groups of 20 fish, maintained at ambient temperature, were sampled over time to determine depuration rate. Results suggest that there is no substantial depuration of Kepone by croaker until water temperature exceeds 15 C.
Planktonic Fish Eggs And Larvae Of The Lower Chesapeake Bay, John E. Olney
Planktonic Fish Eggs And Larvae Of The Lower Chesapeake Bay, John E. Olney
Dissertations, Theses, and Masters Projects
No abstract provided.
The Automated Environmental Information And Design Analysis System, George William Gavaras
The Automated Environmental Information And Design Analysis System, George William Gavaras
Dissertations, Theses, and Masters Projects
No abstract provided.
Bacterial Response To Crude Oil Spillage In A Salt Marsh, Russell Paul Herwig
Bacterial Response To Crude Oil Spillage In A Salt Marsh, Russell Paul Herwig
Dissertations, Theses, and Masters Projects
No abstract provided.
Electrically-Induced Shifts Of The Gallium Arsenide Nuclear Spin Levels, Katherine Ann. Dumas
Electrically-Induced Shifts Of The Gallium Arsenide Nuclear Spin Levels, Katherine Ann. Dumas
Dissertations, Theses, and Masters Projects
No abstract provided.