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Articles 1 - 30 of 206
Full-Text Articles in Physical Sciences and Mathematics
Analysis Of Energy Flow In Us Globec Ecosystems Using End-To-End Models, J. J. Ruzicka, J. H. Steele, S. K. Gaichas, T. Ballerini, D. J. Gifford, R. D. Brodeur, E. E. Hofmann
Analysis Of Energy Flow In Us Globec Ecosystems Using End-To-End Models, J. J. Ruzicka, J. H. Steele, S. K. Gaichas, T. Ballerini, D. J. Gifford, R. D. Brodeur, E. E. Hofmann
CCPO Publications
End-to-end models were constructed to examine and compare the trophic structure and energy flow in coastal shelf ecosystems of four US Global Ocean Ecosystem Dynamics (GLOBEC) study regions: the Northern California Current, the Central Gulf of Alaska, Georges Bank, and the Southwestern Antarctic Peninsula. High-quality data collected on system components and processes over the life of the program were used as input to the models. Although the US GLOBEC program was species-centric, focused on the study of a selected set of target species of ecological or economic importance, we took a broader community-level approach to describe end-to-end energy flow, from …
Looking Forward Transdisciplinary Modeling, Environmental Forecasting, And Management, D. B. Haidvogel, E. Turner, E. N. Curchitser, E. E. Hofmann
Looking Forward Transdisciplinary Modeling, Environmental Forecasting, And Management, D. B. Haidvogel, E. Turner, E. N. Curchitser, E. E. Hofmann
CCPO Publications
No abstract provided.
Telling Stories With Web Archives, Michele C. Weigle
Telling Stories With Web Archives, Michele C. Weigle
Computer Science Presentations
PDF of a powerpoint presentation from the Southeast Women in Computing Conference in Lake Guntersville State Park, Alabama, November 16, 2013. Also available on Slideshare.
Visiting Lecturer Will Link Public Health Risks To Climate Change, Public Affairs & News Bureau, Old Dominion University
Visiting Lecturer Will Link Public Health Risks To Climate Change, Public Affairs & News Bureau, Old Dominion University
News Items
No abstract provided.
Quantifying Risks Of Climate Change And Sea Level Rise To Naval Station Norfolk (Serdp Rc-1701), Kelly Burks-Copes
Quantifying Risks Of Climate Change And Sea Level Rise To Naval Station Norfolk (Serdp Rc-1701), Kelly Burks-Copes
October 2, 2013: Quantifying Risks and Moving Forward
No abstract provided.
Adaptive Planning For Flooding And Coastal Change In Virginia: Legal And Policy Issues For Local Government, Molly Mitchell
Adaptive Planning For Flooding And Coastal Change In Virginia: Legal And Policy Issues For Local Government, Molly Mitchell
October 2, 2013: Quantifying Risks and Moving Forward
No abstract provided.
Agenda, Hr Adaptation Forum
Agenda, Hr Adaptation Forum
October 2, 2013: Quantifying Risks and Moving Forward
No abstract provided.
Moving Forward: Next Steps For Confronting Increased Flood Risks, Molly Mitchell
Moving Forward: Next Steps For Confronting Increased Flood Risks, Molly Mitchell
October 2, 2013: Quantifying Risks and Moving Forward
No abstract provided.
Phosphorus Cycling In Tropical Carbonate Sediment-Seagrass Systems, Zachary Howerton
Phosphorus Cycling In Tropical Carbonate Sediment-Seagrass Systems, Zachary Howerton
OES Theses and Dissertations
This thesis presents two studies focusing on phosphorus cycling in calcium carbonate sediments inhabited by seagrasses. Phosphorus is a major limiting nutrient for primary productivity in these sediments as well as in the overlying waters. In large part this is due to removal of phosphate from solution by adsorption and precipitation reactions.
In chapter II, the relationship between the size of the sedimentary phosphorus pool and the abundance of seagrass on the Great Bahama Bank, as well as the relationship between phosphorus content and grain size in the sediments, were examined to better understand the biogeochemistry of carbonate sediments and …
Sea Level Rise, Spatially Uneven And Temporally Unsteady: Why The U.S. East Coast, The Global Tide Gauge Record, And The Global Altimeter Data Show Different Trends, Tal Ezer
CCPO Publications
Impacts of ocean dynamics on spatial and temporal variations in sea level rise (SLR) along the U.S. East Coast are characterized by empirical mode decomposition analysis and compared with global SLR. The findings show a striking latitudinal SLR pattern. Sea level acceleration consistent with a weakening Gulf Stream is maximum just north of Cape Hatteras and decreasing northward, while SLR driven by multidecadal variations, possibly from climatic variations in subpolar regions, is maximum in the north and decreasing southward. The combined impact of sea level acceleration and multidecadal variations explains why the global mean SLR obtained from similar to 20 …
Measurement Of The Spin Structure Function Gd1 Of The Deuteron And Its Moments At Low Q2, Krishna P. Adhikari
Measurement Of The Spin Structure Function Gd1 Of The Deuteron And Its Moments At Low Q2, Krishna P. Adhikari
Physics Theses & Dissertations
Double polarization cross section differences (Δσ ||) for proton and deuteron targets have been measured in the EG4 experiment using the CLAS detector at Jefferson Lab. Longitudinally polarized electron beams at relatively low energies of 1.056, 1.337, 1.989, 2.256 and 3.0 GeV from the CEBAF accelerator were scattered off longitudinally polarized NH3 and ND3 targets. Scattered electrons were recorded at very low scattering angles (down to θ= 6°) with the help of a new dedicated Cherenkov counter and a special magnetic field setting of the CLAS detector in order to measure the cross section differences in the …
Use Of Immersive Visualization For The Control Of Dental Anxiety During Dental Hygiene Treatment, Carmelo Padrino-Barrios
Use Of Immersive Visualization For The Control Of Dental Anxiety During Dental Hygiene Treatment, Carmelo Padrino-Barrios
Dental Hygiene Theses & Dissertations
Purpose: The purpose of this study was to determine the effectiveness of immersive visualization (IV) therapy, a technique that provides visual and stereoscopic display through the use of eyewear, in anxious patients during an oral prophylaxis. Methods: A convenience sample of thirty adults was enrolled. A split mouth design was utilized. Subjects were randomly divided into two groups: group A (use of IV for the right side of the mouth), and group B (use of IV for the left side of the mouth). Subjects received a full mouth oral prophylaxis (removal of supra and subgingival calculus and selective polishing), always …
Using Real Property Layouts To Study The Foreclosure Contagion Effect In Real Estate With Agent-Based Modeling And Simulation, Daniele Vernon-Bido
Using Real Property Layouts To Study The Foreclosure Contagion Effect In Real Estate With Agent-Based Modeling And Simulation, Daniele Vernon-Bido
Computational Modeling & Simulation Engineering Theses & Dissertations
Foreclosures in the United States increased sharply from 2007 to 2009. These foreclosures had a spillover effect on neighboring property values causing additional foreclosures. This is known as the foreclosure contagion effect.
Recent studies have quantified the discount attributed to foreclosure contagion using equation-based techniques. However, the discount varied between studies and markets. Further studies using agent-based modeling and simulation have demonstrated the relationship between the discounts, the time a foreclosure remains on the market, the prevailing interest rates and the average property values.
This study uses agent-based modeling and simulation (ABMS) to explore the differences that varying neighborhood densities …
Hydrogeologic Variations Across A Barrier Island That Influence Inter-Dune Wetlands False Cape State Park, Virginia, Matthew Collier Richardson
Hydrogeologic Variations Across A Barrier Island That Influence Inter-Dune Wetlands False Cape State Park, Virginia, Matthew Collier Richardson
OES Theses and Dissertations
False Cape State Park in southeastern Virginia Beach, Virginia contains a transgressive barrier island complex. Inter-dune swales located on the eastern coast of the barrier island contain soils that experience hydric conditions. However, these swales lack the prolonged presence of hydric soil indicators that are necessary for a site to be officially recognized as a jurisdictional wetland. The appearance and subsequent disappearance of redoximorphic wetland soil features in the young, sandy soils of the inter-dune swales here may stem from changes in the patterns of groundwater recharge and discharge across the island. These soils are being monitored by the Mid …
Molecular Characteristics Of The Water Soluable Organic Matter In Size Resolved Aerosols Collected Over The North Atlantic Ocean, Sarah Catherine Gurganus
Molecular Characteristics Of The Water Soluable Organic Matter In Size Resolved Aerosols Collected Over The North Atlantic Ocean, Sarah Catherine Gurganus
Chemistry & Biochemistry Theses & Dissertations
Aerosol particulate matter is acknowledged to have effects on health and the environment and further investigation into the molecular characteristics of aerosols is necessary in order to fully understand the potential links between the molecular characteristics and the impacts that these particles have on health and the environment. Aerosols are often discussed with reference to their size because particles of different sizes can often be associated with different primary sources. This study presents a molecular-level chemical characterization of the water soluble organic matter fraction of 17 aerosol impactor samples representing 3 air mass influences (North American, North African, and marine) …
Freeze-Out Dynamics Via Charged Kaon Femtoscopy In √ S N N = 200 Gev Central Au + Au Collisions, L. Adamczyk, J. K. Adkins, G. Agakishiev, M. M. Aggarwal, Z. Ahammed, I. Alekseev, S. Bültmann, I. Koralt, D. Plyku, Star Collaboration
Freeze-Out Dynamics Via Charged Kaon Femtoscopy In √ S N N = 200 Gev Central Au + Au Collisions, L. Adamczyk, J. K. Adkins, G. Agakishiev, M. M. Aggarwal, Z. Ahammed, I. Alekseev, S. Bültmann, I. Koralt, D. Plyku, Star Collaboration
Physics Faculty Publications
We present measurements of three-dimensional correlation functions of like-sign, low-transverse-momentum kaon pairs from √sNN=200 GeV Au+Au collisions. A Cartesian surface-spherical harmonic decomposition technique was used to extract the kaon source function. The latter was found to have a three-dimensional Gaussian shape and can be adequately reproduced by Therminator event-generator simulations with resonance contributions taken into account. Compared to the pion one, the kaon source function is generally narrower and does not have the long tail along the pair transverse momentum direction. The kaon Gaussian radii display a monotonic decrease with increasing transverse mass mT over the interval of 0.55≤mT …
Dynamical Downscaling Projections Of Twenty-First-Century Atlantic Hurricane Activity: Cmip3 And Cmip5 Model-Based Scenarios, Thomas R. Knutson, Joseph J. Sirutis, Gabriel A. Vecchi, Stephen Garner, Ming Zhao, Hyeong-Seog Kim, Morris Bender, Robert E. Tuleya, Isaac M. Held, Gabriele Villarini
Dynamical Downscaling Projections Of Twenty-First-Century Atlantic Hurricane Activity: Cmip3 And Cmip5 Model-Based Scenarios, Thomas R. Knutson, Joseph J. Sirutis, Gabriel A. Vecchi, Stephen Garner, Ming Zhao, Hyeong-Seog Kim, Morris Bender, Robert E. Tuleya, Isaac M. Held, Gabriele Villarini
CCPO Publications
Twenty-first-century projections of Atlantic climate change are downscaled to explore the robustness of potential changes in hurricane activity. Multimodel ensembles using the phase 3 of the Coupled Model Intercomparison Project (CMIP3)/Special Report on Emissions Scenarios A1B (SRES A1B; late-twenty-first century) and phase 5 of the Coupled Model Intercomparison Project (CMIP5)/representative concentration pathway 4.5 (RCP4.5; early- and late-twenty-first century) scenarios are examined. Ten individual CMIP3 models are downscaled to assess the spread of results among the CMIP3 (but not the CMIP5) models. Downscaling simulations are compared for 18-km grid regional and 50-km grid global models. Storm cases from the regional model …
The Magnesium Isotopologues Of Mgh In The A2Π-X 2Σ+ System, Kenneth H. Hinkle, Lloyd Wallace, Ram S. Ram, Peter F. Bernath, Christopher Sneden, Sara Lucatello
The Magnesium Isotopologues Of Mgh In The A2Π-X 2Σ+ System, Kenneth H. Hinkle, Lloyd Wallace, Ram S. Ram, Peter F. Bernath, Christopher Sneden, Sara Lucatello
Chemistry & Biochemistry Faculty Publications
Using laboratory hollow cathode spectra we have identified lines of the less common magnesium isotopologues of MgH, 25MgH and 26MgH, in the A2Π-X2Σ+ system. Based on the previous analysis of 24MgH, molecular lines have been measured and molecular constants derived for 25MgH and 26MgH. Term values and linelists, in both wavenumber and wavelength units, are presented. The A2Π-X2Σ+ system of MgH is important for measuring the magnesium isotope ratios in stars. Examples of analysis using the new linelists to derive the Mg isotope ratio in …
Re.Invest, Denise Thompson
Re.Invest, Denise Thompson
July 10, 2013: Best Practices and Communications Strategies for Adapting to Sea Level Rise and Flooding
No abstract provided.
Agenda, Hr Adaptation Forum
Agenda, Hr Adaptation Forum
July 10, 2013: Best Practices and Communications Strategies for Adapting to Sea Level Rise and Flooding
No abstract provided.
Earning Trust And Explaining Complexities As You Communicate Climate Science: The Cause Model, Katherine E. Rowan
Earning Trust And Explaining Complexities As You Communicate Climate Science: The Cause Model, Katherine E. Rowan
July 10, 2013: Best Practices and Communications Strategies for Adapting to Sea Level Rise and Flooding
No abstract provided.
Risky Business: Engaging The Public In Policy Discourse On Sea-Level Rise And Inundation, Karen Akerlof
Risky Business: Engaging The Public In Policy Discourse On Sea-Level Rise And Inundation, Karen Akerlof
July 10, 2013: Best Practices and Communications Strategies for Adapting to Sea Level Rise and Flooding
No abstract provided.
"How Big Should My Water Wings Be?", Margaret Davidson
"How Big Should My Water Wings Be?", Margaret Davidson
July 10, 2013: Best Practices and Communications Strategies for Adapting to Sea Level Rise and Flooding
No abstract provided.
Circulation, Vol. 18, No. 3, Center For Coastal Physical Oceanography, Old Dominion University, Tal Ezer, Larry P. Atkinson
Circulation, Vol. 18, No. 3, Center For Coastal Physical Oceanography, Old Dominion University, Tal Ezer, Larry P. Atkinson
CCPO Circulation
Summer 2013 issue of CCPO Circulation featuring article "The Connection Between Local Sea Level Rise, Climate Change and Ocean Circulation" by Tal Ezer and Larry P. Atkinson
Optimal Control Modeling And Simulation, With Application To Cholera Dynamics, Chairat Modnak
Optimal Control Modeling And Simulation, With Application To Cholera Dynamics, Chairat Modnak
Mathematics & Statistics Theses & Dissertations
The theory of optimal control, a modern extension of the calculus of variations. has found many applications in a wide range of scientific fields, particularly in epidemiology with respect to disease prevention and intervention. In this dissertation. we conduct optimal control modeling, simulation and analysis to cholera dynamics. Cholera is a severe intestinal infectious disease that remains a serious public health threat in developing countries. Transmission of cholera involves complex interactions between the human host, the pathogen, and the environment. The worldwide cholera outbreaks and their increasing severity, frequency and duration in recent years underscore the gap between the complex …
The Connection Between Local Sea Level Rise, Climate Change And Ocean Circulation, Tal Ezer, Larry P. Atkinson
The Connection Between Local Sea Level Rise, Climate Change And Ocean Circulation, Tal Ezer, Larry P. Atkinson
CCPO Publications
In recent years, Norfolk has become a symbol for a city that is already battling the impact of sea level rise (SLR). Street flooding during high tides (Fig. 1, left) is much more common now than in the past, and storm surges (Fig. 1, right) are more severe and last longer. Therefore, as part of Old Dominion University’s Climate Change and Sea Level Rise Initiative (CCSLRI), CCPO scientists focus on studies that enhance our understanding of the causes of local SLR and improve our ability to predict future SLR. This information can help policy makers, insurers, city planners and other …
Third Harmonic Flow Of Charged Particles In Au + Au Collisions At √ S Nn = 200 Gev, L. Adamczyk, J. K. Adkins, G. Agakishiev, M. M. Aggarwal, Z. Ahammed, Av. V. Alakhverdyants, I. Alekseev, S. Bültmann, I. Koraly, Star Collaboration
Third Harmonic Flow Of Charged Particles In Au + Au Collisions At √ S Nn = 200 Gev, L. Adamczyk, J. K. Adkins, G. Agakishiev, M. M. Aggarwal, Z. Ahammed, Av. V. Alakhverdyants, I. Alekseev, S. Bültmann, I. Koraly, Star Collaboration
Physics Faculty Publications
We report measurements of the third harmonic coefficient of the azimuthal anisotropy, v3, known as triangular flow. The analysis is for charged particles in Au+Au collisions at √sNN=200 GeV, based on data from the STAR experiment at the BNL Relativistic Heavy Ion Collider. Two-particle correlations as a function of their pseudorapidity separation are fit with narrow and wide Gaussians. Measurements of triangular flow are extracted from the wide Gaussian, from two-particle cumulants with a pseudorapidity gap, and also from event plane analysis methods with a large pseudorapidity gap between the particles and the event plane. These results are …
Old Dominion University Climate Change And Sea Level Rise Initiative, Summer 2013, Larry P. Atkinson (Editor), Hans-Peter Plag (Editor)
Old Dominion University Climate Change And Sea Level Rise Initiative, Summer 2013, Larry P. Atkinson (Editor), Hans-Peter Plag (Editor)
CCSLRI Newsletters
Summer 2013 Newsletter of the Old Dominion University Climate Change and Sea Level Rise Initiative
Fish Species Distribution In Seagrass Habitats Of Chesapeake Bay Are Structured By Abiotic And Biotic Factors, Jason J. Schaffler, Jacques Van Montfrans, Cynthia M. Jones, Robert J. Orth
Fish Species Distribution In Seagrass Habitats Of Chesapeake Bay Are Structured By Abiotic And Biotic Factors, Jason J. Schaffler, Jacques Van Montfrans, Cynthia M. Jones, Robert J. Orth
OES Faculty Publications
Seagrass habitats have long been known to serve as nursery habitats for juvenile fish by providing refuges from predation and areas of high forage abundance. However, comparatively less is known about other factors structuring fish communities that make extensive use of seagrass as nursery habitat. We examined both physical and biological factors that may structure the juvenile seagrass-associated fish communities across a synoptic-scale multiyear study in lower Chesapeake Bay. Across 3years of sampling, we collected 21,153 fish from 31 species. Silver Perch Bairdiella chrysoura made up over 86% of all individuals collected. Nine additional species made up at least 1% …
Modelling Locally Changing Variance Structured Time Series Data By Using Breakpoints Bootstrap Filtering, Rajan Lamichhane
Modelling Locally Changing Variance Structured Time Series Data By Using Breakpoints Bootstrap Filtering, Rajan Lamichhane
Mathematics & Statistics Theses & Dissertations
Stochastic processes have applications in many areas such as oceanography and engineering. Special classes of such processes deal with time series of sparse data. Studies in such cases focus in the analysis, construction and prediction in parametric models. Here, we assume several non-linear time series with additive noise components, and the model fitting is proposed in two stages. The first stage identifies the density using all the clusters information, without specifying any prior knowledge of the underlying distribution function of the time series. The effect of covariates is controlled by fitting the linear regression model with serially correlated errors. In …