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Articles 3481 - 3510 of 5954
Full-Text Articles in Physical Sciences and Mathematics
East, West, Or Center? Turkey's Stance Straddling Continents, Pipelines, And Interdependences, Mustafa Kemal Dagdelen
East, West, Or Center? Turkey's Stance Straddling Continents, Pipelines, And Interdependences, Mustafa Kemal Dagdelen
Graduate Program in International Studies Theses & Dissertations
This thesis concentrates on the international relations of Turkey by studying one of the significant parameters of the world affairs, the Energy Security issue, and Robert 0. Keohane and Joseph S. Nye's Complex Interdependence concept. The research is conducted through two case studies between Turkey and two different neighboring actors, Iran and the European Union. This thesis is a qualitative study with descriptive analyses on the literature of the interdependence and the energy security concepts. By revealing mutual dependences between Turkey, Iran, and the European Union, with different vulnerabilities, the results of this scholarly quest suggest that the interdependent nature …
Sensitivity Of Circumpolar Deep Water Transport And Ice Shelf Basal Melt Along The West Antarctic Peninsula To Changes In The Winds, Michael S. Dinniman, John M. Klinck, Eileen E. Hofmann
Sensitivity Of Circumpolar Deep Water Transport And Ice Shelf Basal Melt Along The West Antarctic Peninsula To Changes In The Winds, Michael S. Dinniman, John M. Klinck, Eileen E. Hofmann
CCPO Publications
Circumpolar Deep Water (CDW) can be found near the continental shelf break around most of Antarctica. Advection of this relatively warm water (up to 2 degrees C) across the continental shelf to the base of floating ice shelves is thought to be a critical source of heat for basal melting in some locations. A high-resolution (4 km) regional ocean-sea ice-ice shelf model of the west Antarctic Peninsula (WAP) coastal ocean was used to examine the effects of changes in the winds on across-shelf CDW transport and ice shelf basal melt. Increases and decreases in the strength of the wind fields …
Meta-Heuristics Analysis For Technologically Complex Programs: Understanding The Impact Of Total Constraints For Schedule, Quality And Cost, Henry Darrel Webb
Meta-Heuristics Analysis For Technologically Complex Programs: Understanding The Impact Of Total Constraints For Schedule, Quality And Cost, Henry Darrel Webb
Engineering Management & Systems Engineering Projects for D. Eng. Degree
Program management data associated with a technically complex radio frequency electronics base communication system has been collected and analyzed to identify heuristics which may be utilized in addition to existing processes and procedures to provide indicators that a program is trending to failure. Analysis of the collected data includes detailed schedule analysis, detailed earned value management analysis and defect analysis within the framework of a Firm Fixed Price (FFP) incentive fee contract.
This project develops heuristics and provides recommendations for analysis of complex project management efforts such as those discussed herein. The analysis of the effects of the constraints on …
Assessing Movement Of Fish Through Spectral Analysis Of Otolith Life History Scans, Renee Reilly Hoover
Assessing Movement Of Fish Through Spectral Analysis Of Otolith Life History Scans, Renee Reilly Hoover
OES Theses and Dissertations
The ability to accurately measure movement timing across environmental gradients is fundamental for testing hypotheses in marine ecology that deal with ingress, egress, and migration of fish. Timing and patterns of movement have been estimated using life-history scans of the chemical signatures encoded in fish otoliths (ear stones). I provide a quantitative approach to examining life history scan data using spectral analysis, which retrospectively measures the movement timing for individual fish. Sagittal otoliths from juvenile Atlantic croaker (Micropogonias undulates) and adult black sea bass (Centropristis striata) were sampled using laser ablation inductively coupled plasma mass spectrometry …
Identification Of Persistent Long Range Interactions In GA95 And GB95 Through Thermal Unfolding Simulations, Milen Redai Tesfamariam
Identification Of Persistent Long Range Interactions In GA95 And GB95 Through Thermal Unfolding Simulations, Milen Redai Tesfamariam
Chemistry & Biochemistry Theses & Dissertations
For over five decades, different experiments have been performed to research how proteins attain their native three dimensional structures. However, the folding problem continues to be a puzzle in modern science. The design of two proteins that have maximal sequence identity but different folds and functions is one method that is being used to study the relationship between protein structure and amino acid sequence. In particular, mutant proteins of Streptococcus protein G, GA and GB, have 95% sequence identity and a 3a helix fold and β4/a fold, respectively. Molecular dynamics simulations of GA95 …
Multidentate Resorcinarene Surfactants For The Phase Transfer Of Metal Nanoparticles And Nanodiamonds: Applications In Catalysis And Diamond Film Growth, Vara Prasad Sheela
Multidentate Resorcinarene Surfactants For The Phase Transfer Of Metal Nanoparticles And Nanodiamonds: Applications In Catalysis And Diamond Film Growth, Vara Prasad Sheela
Chemistry & Biochemistry Theses & Dissertations
One main objective of the present work is to functionalize cuboctahedral platinum nanoparticles with various multidentate resorcinarene surfactants and study their influence in determining their catalytic activity. We hypothesized that catalytically active and recyclable catalysts can be achieved by incomplete yet strong passivation of the nanoparticle surfaces by using multidentate resorcinarene surfactants. We have developed phase transfer protocols for functionalizing cuboctahedral platinum nanoparticles with resorcinarene thiol or amine. Fluorescence assay confirmed that both these nanoparticles contained almost comparable unpassivated metal area. The activity of such phase transferred nanoparticles was tested in the catalytic hydrogenation of allyl alcohol. The conversion of …
Population Structure And Connectivity Of An Important Pelagic Forage Fish In The Antarctic Ecosystem, Pleuragramma Antarcticum In Relation To Large Scale Circulation, Jason W. Ferguson
Population Structure And Connectivity Of An Important Pelagic Forage Fish In The Antarctic Ecosystem, Pleuragramma Antarcticum In Relation To Large Scale Circulation, Jason W. Ferguson
OES Theses and Dissertations
Ocean circulation has been identified as a major process controlling the distribution of biological material in marine systems. Large-scale transport by the Antarctic Circumpolar Current (ACC), the Ross and Weddell Gyres, and the Antarctic Coastal Current can promote spatially complex population structure in the Southern Ocean through advection. Antarctic silverfish (Pleuragramma antarcticum), a pelagic, neutrally buoyant notothenioid fish species, are distributed around the shelf systems of Antarctica and are considered an important species rivaling krill as prey for many birds, seals, whales, and other fish. We asked whether silverfish are distributed in independent, discrete populations along the shelf systems of …
Dynamics Of Non-Thermal Plasma Jets Under Variable Pressure, Mehmet Arda Akman
Dynamics Of Non-Thermal Plasma Jets Under Variable Pressure, Mehmet Arda Akman
Electrical & Computer Engineering Theses & Dissertations
Non-thermal plasma (NTP) jets driven by short DC pulses have attracted the attention of researchers within the past decade due to their promising bio-medical applications in the fields of wound healing, cancer treatment and sterilization. The ability to operate at atmospheric pressure, room temperature and simple device configuration has greatly contributed to their appeal and adoption in the plasma science community. However, the mechanisms that sustain the plasma generation and propagation in ambient air are currently a topic of debate. For instance, what appears as a continuous stream of a plasma plume extending outwards from a plasma device into the …
Gravity Anomalies Along The East Scotia Ridge: Constraining The Relative Importance Of Magmatic And Tectonic Controls On Crustal Accretion, Briton Lee Nicholson
Gravity Anomalies Along The East Scotia Ridge: Constraining The Relative Importance Of Magmatic And Tectonic Controls On Crustal Accretion, Briton Lee Nicholson
OES Theses and Dissertations
Similar to regions such as the Lau Basin and the Caribbean Sea, the eastern Scotia Sea is a geologically complex area that involves multiple plate boundary types. This study uses bathymetry and gravity data to infer upper mantle geodynamics in the eastern Scotia Sea region. Beneath this region is an intermediate-rate back-arc spreading center known as the East Scotia Ridge (ESR) that forms the boundary between the Scotia and Sandwich plates. To the east of the ESR are the South Sandwich island arc and the South Sandwich Trench. The ESR is a relatively young feature, with spreading estimated to have …
Synthesis Of A Superlattice Structure Of Alternating Layers Of Antimony Telluride And Bismuth Telluride By Atomic Layer Deposition For Thermoelectric Applications, David Nminibapiel
Synthesis Of A Superlattice Structure Of Alternating Layers Of Antimony Telluride And Bismuth Telluride By Atomic Layer Deposition For Thermoelectric Applications, David Nminibapiel
Electrical & Computer Engineering Theses & Dissertations
Alloys composed of bismuth, antimony and telluride compounds exhibit very high figure of merit ZT values at relatively low temperatures, making them exceptional thermoelectric materials. Advancement in thermoelectric devices and applications hinges on increasing ZT, which is a ratio of the thermoelectric power factor to the thermal conductivity. One of the proposed avenues to achieving this goal is the use of low dimensional structures such as quantum wells, quantum dots, superlattices (SL) and nanolaminates to affect heat transport. SL structures can effectively confine charge carriers as well as scatter phonons which contribute significantly to thermal conductivity. In this thesis, the …
An Extensible Framework For Creating Personal Archives Of Web Resources Requiring Authentication, Matthew Ryan Kelly
An Extensible Framework For Creating Personal Archives Of Web Resources Requiring Authentication, Matthew Ryan Kelly
Computer Science Theses & Dissertations
The key factors for the success of the World Wide Web are its large size and the lack of a centralized control over its contents. In recent years, many advances have been made in preserving web content but much of this content (namely, social media content) was not archived, or still to this day is not being archived,for various reasons. Tools built to accomplish this frequently break because of the dynamic structure of social media websites. Because many social media websites exhibit a commonality in hierarchy of the content, it would be worthwhile to setup a means to reference this …
Visualizing Digital Collections At Archive-It, Kalpesh Padia
Visualizing Digital Collections At Archive-It, Kalpesh Padia
Computer Science Theses & Dissertations
Archive-It, a subscription service from the Internet Archive, allows users to create,maintain, and view digital collections of web resources. The current interface of Archive-It is largely text-based, supporting drill-down navigation using lists of URIs.While this interface provides good searching capabilities, it is not efficient for browsing. In the absence of keywords, a user has to spend large amount of time trying to locate a web page of interest. In order to provide a better visual experience to the user, we have studied the underlying characteristics of Archive-It collections and implemented six different visualizations (treemap, time cloud, bubble chart, image plot, …
Friend: A Cyber-Physical System For Traffic Flow Related Information Aggregation And Dissemination, Samy S. El-Tawab
Friend: A Cyber-Physical System For Traffic Flow Related Information Aggregation And Dissemination, Samy S. El-Tawab
Computer Science Theses & Dissertations
The major contribution of this thesis is to lay the theoretical foundations of FRIEND — A cyber-physical system for traffic Flow-Related Information aggrEgatioN and Dissemination. By integrating resources and capabilities at the nexus between the cyber and physical worlds, FRIEND will contribute to aggregating traffic flow data collected by the huge fleet of vehicles on our roads into a comprehensive, near real-time synopsis of traffic flow conditions. We anticipate providing drivers with a meaningful, color-coded, at-a-glance view of flow conditions ahead, alerting them to congested traffic.
FRIEND can be used to provide accurate information about traffic flow and can be …
Spectroscopic Characterization Of Dissolved Organic Matter: Insights Into Composition, Photochemical Transformation And Carbon Cycling, John Robert Helms
Spectroscopic Characterization Of Dissolved Organic Matter: Insights Into Composition, Photochemical Transformation And Carbon Cycling, John Robert Helms
Chemistry & Biochemistry Theses & Dissertations
This dissertation explores processes affecting the composition of dissolved organic matter (DOM) and how DOM composition changes in sunlit surface waters and in the dark interior ocean. Simulated solar irradiations were used to investigate the impact of photochemistry on terrestrial waters and deep ocean DOM. The photochemically mediated processes observed in Dismal Swamp samples included (i) light induced flocculation of up to 12% of the organic matter and 84% of the dissolved iron originally present; (ii) 74-88% mineralization of dissolved organic carbon (DOC) and 95-99% bleaching of chromophoric DOM (CDOM) during 110 days of irradiation; and (iii) nearly complete loss …
Application Of Chebyshev Formalism To Identify Nonlinear Magnetic Field Components In Beam Transport System, Michael Spata
Application Of Chebyshev Formalism To Identify Nonlinear Magnetic Field Components In Beam Transport System, Michael Spata
Physics Theses & Dissertations
An experiment was conducted at Jefferson Lab's Continuous Electron Beam Accelerator Facility to develop a beam-based technique for characterizing the extent of the nonlinearity of the magnetic fields of a beam transport system. Horizontally and vertically oriented pairs of air-core kicker magnets were simultaneously driven at two different frequencies to provide a time-dependent transverse modulation of the beam orbit relative to the unperturbed reference orbit. Fourier decomposition of the position data at eight different points along the beamline was then used to measure the amplitude of these frequencies. For a purely linear transport system one expects to find solely the …
Modeling, Visualizing, And Understanding Complex Tectonic Structures On The Surface And In The Sub-Surface, Steven Wild
Modeling, Visualizing, And Understanding Complex Tectonic Structures On The Surface And In The Sub-Surface, Steven Wild
Physics Theses & Dissertations
Plate tectonics is a relatively new theory with many details of plate dynamics which remain to be worked out. Moving plates can interact by divergence, lateral sliding, convergence, or collision. At a convergent plate boundary, a lithospheric slab of oceanic crust and upper mantle is subducted at a trench and dips down under a magmatic arc — either oceanic or continental. Textbooks show a static view of convergent boundaries but plate dynamics require that subduction zones and magmatic arcs must migrate with time. Therefore I develop animated models to help convey this motion. Also, convergent plate boundaries cannot continue along …
A Statistical Model To Determine Multiple Binding Sites Of A Transcription Factor On Dna Using Chip-Seq Data, Rasika Jayatillake
A Statistical Model To Determine Multiple Binding Sites Of A Transcription Factor On Dna Using Chip-Seq Data, Rasika Jayatillake
Mathematics & Statistics Theses & Dissertations
Protein-DNA interaction is vital to many biological processes in cells such as cell division, embryo development and regulating gene expression. Chromatin Immunoprecipitation followed by massively parallel sequencing (ChIP-seq) is a new technology that can reveal protein binding sites in genome with superior accuracy. Although many methods have been proposed to find binding sites for ChIP-seq data, they can find only one binding site within a short region of the genome. In this study we introduce a statistical model to identify multiple binding sites of a transcription factor within a short region of the genome using the ChIP-seq data. Mapped sequence …
Serious Game Design Principles: The Impact Of Game Design On Learning Outcomes, Michael W. Martin
Serious Game Design Principles: The Impact Of Game Design On Learning Outcomes, Michael W. Martin
Computational Modeling & Simulation Engineering Theses & Dissertations
This dissertation examines the research question "How do video game design principles affect learning outcomes in serious games?" This research first develops a theoretical foundation concerning the meaning of the terms "game" and "serious game". This conceptual clarification is broken down into analytic propositions, which state that games have participants, rules, goals and challenges, and synthetic propositions, which state that the games should be intrinsically compelling, provide meaningful choices, and be self encapsulated. Based on these synthetic propositions, three hypotheses were developed. The hypotheses are that games with an enhanced aesthetic presentation, more meaningful choices, or provide player competition will …
Old Dominion University Climate Change And Sea Level Rise Initiative, Summer 2012, Larry P. Atkinson (Editor)
Old Dominion University Climate Change And Sea Level Rise Initiative, Summer 2012, Larry P. Atkinson (Editor)
CCSLRI Newsletters
Summer 2012 Newsletter of the Old Dominion University Climate Change and Sea Level Rise Intiative
The Influence Of Non-Equilibrium Pressure On Rotating Flows, Irfan Rashid Zardadkhan
The Influence Of Non-Equilibrium Pressure On Rotating Flows, Irfan Rashid Zardadkhan
Mechanical & Aerospace Engineering Theses & Dissertations
This study was undertaken to investigate the influence of pressure relaxation on steady, incompressible flows with strong streamline curvature. In the early part of this dissertation research, the significance of non-equilibrium pressure forces in controlling the structure of a steady, two dimensional axial vortex was demonstrated. In order to extend the study of pressure relaxation influences on more complex rotating flows, this dissertation has examined other rotating flow features that can be associated with hurricanes, tornadoes and dust devils. To model these flows, modified boundary layer equations were developed for a fluid column rotating near a solid plane including the …
Incorporating Memory And Learning Mechanisms Into Meta-Raps, Arif Arin
Incorporating Memory And Learning Mechanisms Into Meta-Raps, Arif Arin
Engineering Management & Systems Engineering Theses & Dissertations
Due to the rapid increase of dimensions and complexity of real life problems, it has become more difficult to find optimal solutions using only exact mathematical methods. The need to find near-optimal solutions in an acceptable amount of time is a challenge when developing more sophisticated approaches. A proper answer to this challenge can be through the implementation of metaheuristic approaches. However, a more powerful answer might be reached by incorporating intelligence into metaheuristics.
Meta-RaPS (Metaheuristic for Randomized Priority Search) is a metaheuristic that creates high quality solutions for discrete optimization problems. It is proposed that incorporating memory and learning …
De Novo Protein Structure Modeling From Cryoem Data Through A Dynamic Programming Algorithm In The Secondary Structure Topology Graph, Kamal H. Al Nasr
De Novo Protein Structure Modeling From Cryoem Data Through A Dynamic Programming Algorithm In The Secondary Structure Topology Graph, Kamal H. Al Nasr
Computer Science Theses & Dissertations
Proteins are the molecules carry out the vital functions and make more than the half of dry weight in every cell. Protein in nature folds into a unique and energetically favorable 3-Dimensional (3-D) structure which is critical and unique to its biological function. In contrast to other methods for protein structure determination, Electron Cryorricroscopy (CryoEM) is able to produce volumetric maps of proteins that are poorly soluble, large and hard to crystallize. Furthermore, it studies the proteins in their native environment. Unfortunately, the volumetric maps generated by current advances in CryoEM technique produces protein maps at medium resolution about (~5 …
Response Surface Optimization Of Electron Beam Freeform Fabrication Depositions Using Design Of Experiments, Patricia A. Quigley
Response Surface Optimization Of Electron Beam Freeform Fabrication Depositions Using Design Of Experiments, Patricia A. Quigley
Engineering Management & Systems Engineering Theses & Dissertations
The Electron Beam Freeform Fabrication (EBF3 ) System is a material depositing, layer additive technique that produces three dimensional (3D) parts out of a wide range of metals in high vacuum, using an electron beam and wire feedstock. Screening deposition trials on a titanium alloy, Ti-6Al-4V, at the National Aeronautics Space Administration (NASA) revealed selective vaporization of the aluminum content of linear prototypes when subjected to chemical analysis. In this study, the aluminum content, bead height and bead width output responses were analyzed from a systematic study of the effects that the interactions of the EBF3 processing parameters …
Evaluation Of Electrophoretic Protein Extraction And Database-Driven Protein Identification From Marine Sediments, Eli K. Moore, Brook L. Nunn, Jessica F. Faux, David R. Goodlett, H. Rodger Harvey
Evaluation Of Electrophoretic Protein Extraction And Database-Driven Protein Identification From Marine Sediments, Eli K. Moore, Brook L. Nunn, Jessica F. Faux, David R. Goodlett, H. Rodger Harvey
OES Faculty Publications
Intact proteins comprise a major component of organic carbon and nitrogen produced globally and are likely an important fraction of organic matter in sediments and soils. Extracting the protein component from sediments and soils for mass spectral characterization and identification represents a substantial challenge given the range of products and functionalities present in the complex matrix. Multiple forms of gel electrophoresis were evaluated as a means of enhancing recovery of sedimentary protein before proteomic characterization and compared with a direct enzymatic digestion of proteins in sediments. Resulting tryptic peptides were analyzed using shotgun proteomics and tandem mass spectra were evaluated …
How Do Marine Protected Area Strategies Influence Metapopulation Genetic Connectivity? A Modeling Study With Oysters, Daphne Munroe, Eric N. Powell, John M. Klinck, Eileen E. Hofmann
How Do Marine Protected Area Strategies Influence Metapopulation Genetic Connectivity? A Modeling Study With Oysters, Daphne Munroe, Eric N. Powell, John M. Klinck, Eileen E. Hofmann
CCPO Publications
No abstract provided.
Circulation, Vol. 17, No. 2, Center For Coastal Physical Oceanography, Old Dominion University, A. D. Kirwan Jr.
Circulation, Vol. 17, No. 2, Center For Coastal Physical Oceanography, Old Dominion University, A. D. Kirwan Jr.
CCPO Circulation
Spring 2012 issue of CCPO Circulation featuring "CCPO Celebrates 20 Years: A retrospective" by A. D. Kirwan Jr., former CCPO faculty member
Section Abstracts: Astronomy, Mathematics And Physics With Materials Science
Section Abstracts: Astronomy, Mathematics And Physics With Materials Science
Virginia Journal of Science
Abstracts of the Astronomy, Mathematics, and Physics with Material Science Section for the 90th Annual Meeting of the Virginia Academy of Science, May 23-25, 2012, Norfolk State University, Norfolk, Virginia
Coupled Physical And Biological Modeling Of Atlantic Surfclam Larval Transport And Sub-Population Connectivity In The Middle Atlantic Bight And Georges Bank, Xinzhong (Peter) Zhang, Dale B. Haidvogel, John M. Klinck, Roger Mann, Eric N. Powell
Coupled Physical And Biological Modeling Of Atlantic Surfclam Larval Transport And Sub-Population Connectivity In The Middle Atlantic Bight And Georges Bank, Xinzhong (Peter) Zhang, Dale B. Haidvogel, John M. Klinck, Roger Mann, Eric N. Powell
CCPO Publications
No abstract provided.
Old Dominion University Climate Change And Sea Level Rise Initiative, Spring 2012, Larry P. Atkinson (Editor)
Old Dominion University Climate Change And Sea Level Rise Initiative, Spring 2012, Larry P. Atkinson (Editor)
CCSLRI Newsletters
Summer 2012 Newsletter of the Old Dominion University Climate Change and Sea Level Rise Initiative
Modeling The Dispersion Of Eastern Oyster Larvae (Crassostrea Virginica) And Its Effects On The Movement Of Disease Resistant Genes In The Delaware Bay Estuary, Diego A. Narvaez
Modeling The Dispersion Of Eastern Oyster Larvae (Crassostrea Virginica) And Its Effects On The Movement Of Disease Resistant Genes In The Delaware Bay Estuary, Diego A. Narvaez
OES Theses and Dissertations
This study combines several models to address two primary research questions. How does the interaction of larval biology and environmental variability determine the spatial distribution of oyster larvae in Delaware Bay? What is the role of larval dispersion in the transference of disease-resistant genes? The particle-tracking module in the Regional Ocean Modeling System (ROMS) was converted into an Individual-Based model representing Eastern oyster larvae that has growth and vertical migration. Exchange of larvae between natural oyster reefs was estimated and used in an Individual-Based genetic model that simulates the genetic structure of eastern oysters. Particles were released from a number …