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Articles 1411 - 1440 of 4602

Full-Text Articles in Physical Sciences and Mathematics

Studies Of Molecular Dynamics Of Fmoc Amino Acids Using Solid State Deuteron Nuclear Magnetic Resonance Spectroscopy, Wei Xu Jan 2015

Studies Of Molecular Dynamics Of Fmoc Amino Acids Using Solid State Deuteron Nuclear Magnetic Resonance Spectroscopy, Wei Xu

Dissertations, Theses, and Masters Projects

The purpose of devising and validating models for intramolecular motions for FMOC amino acids is to quantify side chain motion in proteins which plays an important role in understanding biological structure function relations of proteins. In this thesis, spin lattice relaxation times (Ti) of FMOC amino acids were m easured under both static and magic angle spinning (MAS) condition at variable tem peratures. Lower activation energies of the relaxation times than the normal amino acids observed indicate a less sterically crowded environment for the rotation methyl group. A three-site jump model for the methyl group w as developed to fit …


A Mathematical Model Of Tau Protein Hyperphosphorylation: The Effects Of Kinase Inhibitors As A Theoretical Alzheimer's Disease Therapy, Patrick Neil Blank Jan 2015

A Mathematical Model Of Tau Protein Hyperphosphorylation: The Effects Of Kinase Inhibitors As A Theoretical Alzheimer's Disease Therapy, Patrick Neil Blank

Dissertations, Theses, and Masters Projects

No abstract provided.


Development Of A Solid-Supported Glaser-Hay Reaction And Utilization In Conjunction With Unnatural Amino Acids, Jessica S. Lampkowski Jan 2015

Development Of A Solid-Supported Glaser-Hay Reaction And Utilization In Conjunction With Unnatural Amino Acids, Jessica S. Lampkowski

Dissertations, Theses, and Masters Projects

No abstract provided.


Two-Component, Four Reaction Domino Sequence Toward Novel Tricyclic 1,4-Dihydro-2h-Benzo(F)Sochromenes, Yuzhou Chen Jan 2015

Two-Component, Four Reaction Domino Sequence Toward Novel Tricyclic 1,4-Dihydro-2h-Benzo(F)Sochromenes, Yuzhou Chen

Dissertations, Theses, and Masters Projects

The synthesis of complex molecules usually


Gis Data: City Of Hampton, Virginia Shoreline Management Model, Marcia Berman, Harry Berquist, Sharon Killeen, Carl Hershner, Karinna Nunez, Karen Reay, Tamia Rudnicky Jan 2015

Gis Data: City Of Hampton, Virginia Shoreline Management Model, Marcia Berman, Harry Berquist, Sharon Killeen, Carl Hershner, Karinna Nunez, Karen Reay, Tamia Rudnicky

Data

The Shoreline Management Model is a GIS spatial model that determines appropriate shoreline best management practices using available spatial data and decision tree logic. Available shoreline conditions used in the model include the presence or absence of tidal marshes, beaches, and forested riparian buffers, bank vegetation cover, bank height, wave exposure (fetch), nearshore water depth, and proximity of coastal development to the shoreline. The model output for shoreline best management practices is displayed in the locality Comprehensive Map Viewer. One GIS shapefile is developed that describes two arcs or lines representing practices in the upland area and practices at the …


Gis Data: Mathews County, Virginia Shoreline Management Model, Marcia Berman, Harry Berquist, Sharon Killeen, Carl Hershner, Karinna Nunez, Karen Reay, Tamia Rudnicky, Daniel E. Schatt, David Weiss Jan 2015

Gis Data: Mathews County, Virginia Shoreline Management Model, Marcia Berman, Harry Berquist, Sharon Killeen, Carl Hershner, Karinna Nunez, Karen Reay, Tamia Rudnicky, Daniel E. Schatt, David Weiss

Data

The Shoreline Management Model is a GIS spatial model that determines appropriate shoreline best management practices using available spatial data and decision tree logic. Available shoreline conditions used in the model include the presence or absence of tidal marshes, beaches, and forested riparian buffers, bank vegetation cover, bank height, wave exposure (fetch), nearshore water depth, and proximity of coastal development to the shoreline. The model output for shoreline best management practices is displayed in the locality Comprehensive Map Viewer. One GIS shapefile is developed that describes two arcs or lines representing practices in the upland area and practices at the …


Gis Data: City Of Poquoson, Virginia Shoreline Management Model, Marcia Berman, Karinna Nunez, Sharon Killeen, Tamia Rudnicky, Carl Hershner, David Stanhope, David Weiss, Julie Bradshaw, Christine Tombleson Jan 2015

Gis Data: City Of Poquoson, Virginia Shoreline Management Model, Marcia Berman, Karinna Nunez, Sharon Killeen, Tamia Rudnicky, Carl Hershner, David Stanhope, David Weiss, Julie Bradshaw, Christine Tombleson

Data

The Shoreline Management Model is a GIS spatial model that determines appropriate shoreline best management practices using available spatial data and decision tree logic. Available shoreline conditions used in the model include the presence or absence of tidal marshes, beaches, and forested riparian buffers, bank vegetation cover, bank height, wave exposure (fetch), nearshore water depth, and proximity of coastal development to the shoreline. The model output for shoreline best management practices is displayed in the locality Comprehensive Map Viewer. One GIS shapefile is developed that describes two arcs or lines representing practices in the upland area and practices at the …


Providing Efficient Services For Smartphone Applications, Yifan Zhang Jan 2015

Providing Efficient Services For Smartphone Applications, Yifan Zhang

Dissertations, Theses, and Masters Projects

Mobile applications are becoming an indispensable part of people's lives, as they allow access to a broad range of services when users are on the go. We present our efforts towards enabling efficient mobile applications in smartphones. Our goal is to improve efficiency of the underlying services, which provide essential functionality to smartphone applications. In particular, we are interested in three fundamental services in smartphones: wireless communication service, power management service, and location reporting service.;For the wireless communication service, we focus on improving spectrum utilization efficiency for cognitive radio communications. We propose ETCH, a set of channel hopping based MAC …


2013 Chesapeake Bay Sav Coverage, Sav Data Administrator, Virginia Institute Of Marine Science Dec 2014

2013 Chesapeake Bay Sav Coverage, Sav Data Administrator, Virginia Institute Of Marine Science

Data

Abstract: The 2013 Chesapeake Bay SAV Coverage was mapped from 1:24,000 black and white aerial photography to assess water quality in the Bay. Each area of SAV was interpreted from the rectified photography and classified into one of four density classes by the percentage of cover. The SAV beds were entered into an SDE GIS fetaure class using the quality control procedures documented below. The dataset contains all SAV areas that were identified from the areas flown. Some areas that are presumed to contain no SAV were not flown. Some small beds, particularly along narrow tributaries may not have been …


City Of Norfolk, Virginia Shoreline Inventory Report Methods And Guidelines, Marcia Berman, Karinna Nunez, Sharon Killeen, Tamia Rudnicky, Julie Bradshaw, Karen Duhring, Kory Angstadt, Alexandra Procopi, David Weiss, Carl Hershner Dec 2014

City Of Norfolk, Virginia Shoreline Inventory Report Methods And Guidelines, Marcia Berman, Karinna Nunez, Sharon Killeen, Tamia Rudnicky, Julie Bradshaw, Karen Duhring, Kory Angstadt, Alexandra Procopi, David Weiss, Carl Hershner

Reports

The data inventory developed for the Shoreline Inventory is based on a three tiered shoreline assessment approach. This assessment characterizes conditions that can be observed from a small boat navigating along the shoreline or by using observations made remotely at the desktop using high resolution imagery. The three tiered shoreline assessment approach divides the shorezone into three regions:

1) the immediate riparian zone, evaluated for land use; 2) the bank, evaluated for height, stability, cover and natural protection; and 3) the shoreline, describing the presence of shoreline structures for shore protection and recreational purposes.

The 2014 Inventory for the City …


Shoreline Evolution: Fairfax County, Virginia Potomac River Shoreline, Donna A. Milligan, Christine A. Wilcox, C. Scott Hardaway Jr. Dec 2014

Shoreline Evolution: Fairfax County, Virginia Potomac River Shoreline, Donna A. Milligan, Christine A. Wilcox, C. Scott Hardaway Jr.

Reports

Fairfax County is situated along the upper reaches of the Potomac River (Figure 1). Because the County’s shoreline is continually changing, determining where the shoreline was in the past, how far and how fast it is moving, and what factors drive shoreline change will help define where the shoreline will be going in the future. These rates and patterns of shore change along Chesapeake Bay’s estuarine shores will differ through time as winds, waves, tides and currents shape and modify coastlines by eroding, transporting and depositing sediments.

The purpose of this report is to document how the shore zone of …


Virginia Accomplishments Since The 2008 Climate Action Plan Release, Center For Coastal Resources Management, Virginia Institute Of Marine Science Dec 2014

Virginia Accomplishments Since The 2008 Climate Action Plan Release, Center For Coastal Resources Management, Virginia Institute Of Marine Science

Reports

Virginia has undertaken a variety of actions to mitigate the emission of greenhouse gasses and adapt to climate related changes to our weather, wildlife, and sea level. However, these changes have not been undertaken in a coordinated fashion, nor have they been in clear response to the recommendations of any entity that has approached the problem of climate change as a whole. Greenhouse gas mitigation has taken place in the form of a few policies to capture landfill gas, encourage limited energy efficiency, encourage growth of some renewable energy, and reduce vehicle miles traveled. Additionally, good progress has been made …


James City County And City Of Williamsburg, Virginia Shoreline Inventory Report Methods And Guidelines, Marcia Berman, Karinna Nunez, Sharon Killeen, Tamia Rudnicky, Julie Bradshaw, Karen Duhring, Kory Angstadt, Alexandra Procopi, David Weiss, Carl Hershner Dec 2014

James City County And City Of Williamsburg, Virginia Shoreline Inventory Report Methods And Guidelines, Marcia Berman, Karinna Nunez, Sharon Killeen, Tamia Rudnicky, Julie Bradshaw, Karen Duhring, Kory Angstadt, Alexandra Procopi, David Weiss, Carl Hershner

Reports

The data inventory developed for the Shoreline Inventory is based on a three tiered shoreline assessment approach. This assessment characterizes conditions that can be observed from a small boat navigating along the shoreline or by using observations made remotely at the desktop using high resolution imagery. The three tiered shoreline assessment approach divides the shorezone into three regions:

1) the immediate riparian zone, evaluated for land use; 2) the bank, evaluated for height, stability, cover and natural protection; and 3) the shoreline, describing the presence of shoreline structures for shore protection and recreational purposes.

The 2014 Inventory for James City …


Summary Tables: Northumberland County, Virginia Shoreline Inventory Report, Marcia Berman, Karinna Nunez, Sharon Killeen, Tamia Rudnicky, Julie Bradshaw, Karen Duhring, David Stanhope, Kory Angstadt, Christine Tombleson, Alexandra Procopi, David Weiss, Carl Hershner Dec 2014

Summary Tables: Northumberland County, Virginia Shoreline Inventory Report, Marcia Berman, Karinna Nunez, Sharon Killeen, Tamia Rudnicky, Julie Bradshaw, Karen Duhring, David Stanhope, Kory Angstadt, Christine Tombleson, Alexandra Procopi, David Weiss, Carl Hershner

Reports

The Shoreline Inventory Summary Tables quantify observed conditions based on river systems, such as the combined length of linear features (e.g. shoreline miles surveyed, miles of bulkhead and revetment), the total number of point features (e.g. docks, boathouses, boat ramps) & total acres of polygon features (tidal marshes).


Northumberland County, Virginia Shoreline Inventory Report Methods And Guidelines, Marcia Berman, Karinna Nunez, Sharon Killeen, Tamia Rudnicky, Julie Bradshaw, Karen Duhring, David Stanhope, Kory Angstadt, Christine Tombleson, Alexandra Procopi, David Weiss, Carl Hershner Dec 2014

Northumberland County, Virginia Shoreline Inventory Report Methods And Guidelines, Marcia Berman, Karinna Nunez, Sharon Killeen, Tamia Rudnicky, Julie Bradshaw, Karen Duhring, David Stanhope, Kory Angstadt, Christine Tombleson, Alexandra Procopi, David Weiss, Carl Hershner

Reports

The data inventory developed for the Shoreline Inventory is based on a three tiered shoreline assessment approach. This assessment characterizes conditions that can be observed from a small boat navigating along the shoreline or by using observations made remotely at the desktop using high resolution imagery. The three tiered shoreline assessment approach divides the shorezone into three regions:

1 ) the immediate riparian zone, evaluated for land use; 2 ) the bank, evaluated for height, stability, cover and natural protection; and 3 ) the shoreline, describing the presence of shoreline structures for shore protection and recreational purposes.

The 2014 Inventory …


Scaling Ecosystem Services To Reef Development : Effects Of Oyster Density On Nitrogen Removal And Reef Community Structure, M. Lisa Kellogg, Jeffrey C. Cornwell, Michael S. Owens, Mark Luckenbach, Paige G. Ross, Thomas A. Leggett, Jennifer C. Dreyer C. Dreyer, Bowdoin Lusk, Alan Birch, Edward Smith Nov 2014

Scaling Ecosystem Services To Reef Development : Effects Of Oyster Density On Nitrogen Removal And Reef Community Structure, M. Lisa Kellogg, Jeffrey C. Cornwell, Michael S. Owens, Mark Luckenbach, Paige G. Ross, Thomas A. Leggett, Jennifer C. Dreyer C. Dreyer, Bowdoin Lusk, Alan Birch, Edward Smith

Reports

Eighteen native oyster experimental reefs (16-m2 each) were restored using six oyster densities (0, 10, 25, 50, 100 and 250 adult oysters m-2) with three replicates of each density at each of two sites: one subtidal site in Onancock Creek, Virginia and one intertidal site in Hillcrest Oyster Sanctuary within The Nature Conservancy’s Virginia Coast Reserve. A science-based monitoring program explored quantitative relationships between structural and functional characteristics of these restored reefs. Structural parameters examined included oyster abundance, oyster size/biomass, surface shell volume, reef topographic complexity and sediment characteristics. Functional parameters included denitrification rates and macrofaunal abundance and biomass. Data …


Matter, Energy, And Heat Transfer In A Classical Ballistic Atom Pump, Tommy A. Byrd, Kunal K. Das, Kevin Mitchell, Seth Aubin, John B. Delos Nov 2014

Matter, Energy, And Heat Transfer In A Classical Ballistic Atom Pump, Tommy A. Byrd, Kunal K. Das, Kevin Mitchell, Seth Aubin, John B. Delos

Arts & Sciences Articles

A ballistic atom pump is a system containing two reservoirs of neutral atoms or molecules and a junction connecting them containing a localized time-varying potential. Atoms move through the pump as independent particles. Under certain conditions, these pumps can create net transport of atoms from one reservoir to the other. While such systems are sometimes called “quantum pumps,” they are also models of classical chaotic transport, and their quantum behavior cannot be understood without study of the corresponding classical behavior. Here we examine classically such a pump's effect on energy and temperature in the reservoirs, in addition to net particle …


Isotope Shifts In Francium Isotopes Fr206-213 And Fr-221, R. Collister, G. Gwinner, M. Tandecki, Seth Aubin Nov 2014

Isotope Shifts In Francium Isotopes Fr206-213 And Fr-221, R. Collister, G. Gwinner, M. Tandecki, Seth Aubin

Arts & Sciences Articles

We present the isotope shifts of the 7s(1/2) to 7p(1/2) transition for francium isotopes Fr206-213 with reference to Fr-221 collected from two experimental periods. The shifts are measured on a sample of atoms prepared within a magneto-optical trap by a fast sweep of radio-frequency sidebands applied to a carrier laser. King plot analysis, which includes literature values for 7s(1/2) to 7p(3/2) isotope shifts, provides a field shift constant ratio of 1.0520(10) and a difference between the specific mass shift constants of 170(100) GHz amu between the D-1 and D-2 transitions, of sufficient precision to differentiate between ab initio calculations.


Combining Observations And Numerical Model Results To Improve Estimates Of Hypoxic Volume Within Chesapeake Bay, Usa, A. J. Bever, M. A.M. Friedrichs, C. T. Friedrichs, M. E. Scully Oct 2014

Combining Observations And Numerical Model Results To Improve Estimates Of Hypoxic Volume Within Chesapeake Bay, Usa, A. J. Bever, M. A.M. Friedrichs, C. T. Friedrichs, M. E. Scully

Presentations

No abstract provided.


The Development And The Capabilities Of The Community Sediment Transport Modeling System (Cstms) For The York River Estuary, Virginia, Danielle Tarpley, K. Fall, Courtney K. Harris, Carl T. Friedrichs Oct 2014

The Development And The Capabilities Of The Community Sediment Transport Modeling System (Cstms) For The York River Estuary, Virginia, Danielle Tarpley, K. Fall, Courtney K. Harris, Carl T. Friedrichs

Presentations

No abstract provided.


What Controls Bed Erodibility In Muddy, Partially-Mixed Tidal Estuaries?, C. Friedrichs, Grace Cartwright, R. Diaz, K. Fall Oct 2014

What Controls Bed Erodibility In Muddy, Partially-Mixed Tidal Estuaries?, C. Friedrichs, Grace Cartwright, R. Diaz, K. Fall

Presentations

No abstract provided.


Controls On Suspended Particle Properties And Water Clarity Along A Partially-Mixed Estuary, York River, Virginia, Usa, K. A. Fall, C. T. Friedrichs, G. M. Cartwright, D. G. Bowers Oct 2014

Controls On Suspended Particle Properties And Water Clarity Along A Partially-Mixed Estuary, York River, Virginia, Usa, K. A. Fall, C. T. Friedrichs, G. M. Cartwright, D. G. Bowers

Presentations

No abstract provided.


Estuarine Sediment Dynamics, C. T. Friedrichs Oct 2014

Estuarine Sediment Dynamics, C. T. Friedrichs

Presentations

No abstract provided.


Cruise: Yr130619, Stations: S5153- S5168, York River Estuary And Pamunkey River, Virginia, Mudbed Longitudinal Profiler Station Survey Bracketing An Ebb Tide., Kelsey A. Fall, Grace M. Cartwright, Carl T. Friedrichs, David G. Bowers Sep 2014

Cruise: Yr130619, Stations: S5153- S5168, York River Estuary And Pamunkey River, Virginia, Mudbed Longitudinal Profiler Station Survey Bracketing An Ebb Tide., Kelsey A. Fall, Grace M. Cartwright, Carl T. Friedrichs, David G. Bowers

Data

Dataset consists of profile and water column burst Data collected as part of a longitudinal profiler station survey at approximately 20 km, 25 km, 35 km, 45 km, 56 km and 62 km upriver from the mouth of the York River Estuary.


Cruise: Yr130612, Stations: S5127- S5138, York River Estuary And Pamunkey River, Virginia, Mudbed Longitudinal Profiler Station Survey Bracketing A Flood Tide., Kelsey A. Fall, Grace M. Cartwright, Carl T. Friedrichs, David G. Bowers Sep 2014

Cruise: Yr130612, Stations: S5127- S5138, York River Estuary And Pamunkey River, Virginia, Mudbed Longitudinal Profiler Station Survey Bracketing A Flood Tide., Kelsey A. Fall, Grace M. Cartwright, Carl T. Friedrichs, David G. Bowers

Data

Dataset consists of profile and water column burst Data collected as part of a longitudinal profiler station survey at approximately 20 km, 25 km, 35 km, 45 km, 56 km and 62 km upriver from the mouth of the York River Estuary.


Cruise: Yr130618, Stations: S5139- S5152, York River Estuary And Pamunkey River, Virginia, Mudbed Longitudinal Profiler Station Survey Bracketing An Ebb Tide., Kelsey A. Fall, Grace M. Cartwright, Carl T. Friedrichs, David G. Bowers Sep 2014

Cruise: Yr130618, Stations: S5139- S5152, York River Estuary And Pamunkey River, Virginia, Mudbed Longitudinal Profiler Station Survey Bracketing An Ebb Tide., Kelsey A. Fall, Grace M. Cartwright, Carl T. Friedrichs, David G. Bowers

Data

Dataset consists of profile and water column burst Data collected as part of a longitudinal profiler station survey at approximately 20 km, 25 km, 35 km, 45 km, 56 km and 62 km upriver from the mouth of the York River Estuary.


Combining Observations And Numerical Model Results To Improve Estimates Of Hypoxic Volume Within Chesapeake Bay, Usa, A. J. Bever, M A.M. Friedrichs, C. T. Friedrichs, M. E. Scully Sep 2014

Combining Observations And Numerical Model Results To Improve Estimates Of Hypoxic Volume Within Chesapeake Bay, Usa, A. J. Bever, M A.M. Friedrichs, C. T. Friedrichs, M. E. Scully

Presentations

No abstract provided.


Johns Point Landing Living Shoreline – Ecological Monitoring : Final Report To Gloucester County, Donna Marie Bilkovic, Molly Mitchell, Robert Isdell Sep 2014

Johns Point Landing Living Shoreline – Ecological Monitoring : Final Report To Gloucester County, Donna Marie Bilkovic, Molly Mitchell, Robert Isdell

Reports

VIMS monitoring activities consisted of three components:

• Monitoring of marsh vegetation establishment after planting

• Documenting ribbed mussel and oyster recruitment and growth in experimental bags of oyster shell at the living shoreline

• Monitoring infaunal communities prior to and after living shoreline implementation


Evaluating Recruitment Of American Eel, Anguilla Rostrata, In The Potomac River (Spring 2014), Troy D. Tuckey, Mary C. Fabrizio Sep 2014

Evaluating Recruitment Of American Eel, Anguilla Rostrata, In The Potomac River (Spring 2014), Troy D. Tuckey, Mary C. Fabrizio

Reports

The Atlantic States Marine Fisheries Commission (ASMFC) adopted the Interstate Fishery Management Plan (FMP) for the American Eel in November 1999. The FMP focuses on increasing coastal states’ efforts to collect American Eel data through both fishery‐dependent and fishery‐independent studies. Consequently, member jurisdictions agreed to implement an annual survey for young‐of‐year (YOY) American eels. The survey is intended to “…characterize trends in annual recruitment of the YOY eels over time [to produce a] qualitative appraisal of the annual recruitment of American Eel to the U.S. Atlantic Coast” (ASMFC 2000). The development of these surveys began in 2000 with full implementation …


Regional Differences In Quality Of Krill And Fish As Prey Along The Western Antarctic Peninsula, Kate E. Ruck, Deborah K. Steinberg, Elizabeth A. Canuel Aug 2014

Regional Differences In Quality Of Krill And Fish As Prey Along The Western Antarctic Peninsula, Kate E. Ruck, Deborah K. Steinberg, Elizabeth A. Canuel

VIMS Articles

The warming trend in the northern part of the Western Antarctic Peninsula (WAP) has led to a decrease in perennial and summer sea ice, an increase in heat content over the shelf, and lower phytoplankton biomass, which could affect the prey quality of krill and fish that are utilized by apex predators. We compared prey quality metrics, including elemental (C, N) content; total, neutral, and polar lipid content; and energy densities of known penguin prey items including krill (Euphausia superba, Thysanoessa macrura, and E. crystallorophias) and fish (silverfish Pleuragramma antarcticum and the myctophid Electrona antarctica) …