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Articles 391 - 420 of 12299
Full-Text Articles in Physical Sciences and Mathematics
Out-Brief Slides: Municipal Planning Advisory Committee, Federal Emergency Management Agency
Out-Brief Slides: Municipal Planning Advisory Committee, Federal Emergency Management Agency
December 2, 2014: Hampton Roads Climate Preparedness and Resilience Exercise Series
PDF of powerpoint presentation at the "Hampton Roads Climate Adaptation, Preparedness, and Resilience Exercise" on December 2, 2014 at the Ted Constant Convocation Center at Old Dominion University.
2014 Fall Engr333 Student Seminar Presentation, John Sherwood, Jonathan Crow, Nicolaas Ourensma, Zak Devries, Andy Frandsen, Jack Kregel, Ryan Rhodes, Connor Vandongen, Schieffer Kwong, Jee Myung Kim, Matthew Deyoung, Jeff Demaagd, Tyler Devries, Doug Faber, Garrick Hershberger, Jake Derooy, Dustin Brouwer, David Evenhouse, Patrick Anderson, Thomas Brown, Ed Smit, Joel Smith, Thane Symens, Kaitlyn Weinstein, Seth Koetje, Nick Memmelaar, Austin Juza, Matt Ramaker, Ryan Demeester, Jordan Newhof, Wes Richards, Josh Vanderbyl
2014 Fall Engr333 Student Seminar Presentation, John Sherwood, Jonathan Crow, Nicolaas Ourensma, Zak Devries, Andy Frandsen, Jack Kregel, Ryan Rhodes, Connor Vandongen, Schieffer Kwong, Jee Myung Kim, Matthew Deyoung, Jeff Demaagd, Tyler Devries, Doug Faber, Garrick Hershberger, Jake Derooy, Dustin Brouwer, David Evenhouse, Patrick Anderson, Thomas Brown, Ed Smit, Joel Smith, Thane Symens, Kaitlyn Weinstein, Seth Koetje, Nick Memmelaar, Austin Juza, Matt Ramaker, Ryan Demeester, Jordan Newhof, Wes Richards, Josh Vanderbyl
ENGR 333
File for student presentation, given by students in the Fall 2014 class of ENGR333.
Odu Hosts White House-Sponsored Event On Sea Level Rise Preparedness, Mitigation, Public Affairs & News Bureau, Old Dominion University
Odu Hosts White House-Sponsored Event On Sea Level Rise Preparedness, Mitigation, Public Affairs & News Bureau, Old Dominion University
News Items
No abstract provided.
Virtual Participation Schedule, Old Dominion University
Virtual Participation Schedule, Old Dominion University
December 2, 2014: Hampton Roads Climate Preparedness and Resilience Exercise Series
Agenda for the workshop "Hampton Roads Climate Adaptation, Preparedness, and Resilience Exercise" on December 2, 2014 at the Ted Constant Convocation Center at Old Dominion University.
Out-Brief Slides: Our Children’S Time, Federal Emergency Management Agency
Out-Brief Slides: Our Children’S Time, Federal Emergency Management Agency
December 2, 2014: Hampton Roads Climate Preparedness and Resilience Exercise Series
No abstract provided.
K-Theory Of Quadratic Modules: A Study Of Roy's Elementary Orthogonal Group., A. A. Ambily Dr.
K-Theory Of Quadratic Modules: A Study Of Roy's Elementary Orthogonal Group., A. A. Ambily Dr.
Doctoral Theses
This thesis discusses the K-theory of quadratic modules by studying Roys elementary orthogonal group of the quadratic space Q1H(P) over a commutative ring A. We estab- lish a set of commutator relations among the elementary generators of Roys elementary orthogonal group and use this to prove Quillens local-global principle for this elementary group. We also obtain a result on extendability of quadratic modules. We establish nor- mality of the elementary orthogonal group under certain conditions and prove stability results for the Ki group of this orthogonal group. We also prove that Roys elementary orthogonal group and Petrovs odd hyperbolic unitary …
Ultrasmooth Gold Surfaces Prepared By Chemical Mechanical Polishing For Applications In Nanoscience, Michael S. Miller, Michael Anthony Ferrato, Adrian Niec, Mark C. Biesinger, Tricia Breen Carmichael
Ultrasmooth Gold Surfaces Prepared By Chemical Mechanical Polishing For Applications In Nanoscience, Michael S. Miller, Michael Anthony Ferrato, Adrian Niec, Mark C. Biesinger, Tricia Breen Carmichael
Chemistry and Biochemistry Publications
For over 20 years, template stripping has been the best method for preparing ultrasmooth metal surfaces for studies of nanostructures. However, the organic adhesives used in the template stripping method are incompatible with many solvents, limiting the conditions that may subsequently be used to prepare samples; in addition, the film areas that can be reliably prepared are typically limited to ∼1 cm2. In this article, we present chemical-mechanical polishing (CMP) as an adhesive-free, scalable method of preparing ultrasmooth gold surfaces. In this process, a gold film is first deposited by e-beam evaporation onto a 76-mm-diameter silicon wafer. The CMP process …
The Hα Spectroscopy Of Classical B-Emission Stars, Jessie M. Silaj
The Hα Spectroscopy Of Classical B-Emission Stars, Jessie M. Silaj
Electronic Thesis and Dissertation Repository
Classical B-emission (Be) stars are rapidly-rotating, massive stars that possess a dense, equatorial, gaseous disk. The presence of a disk was first inferred from the Balmer series emission that these stars exhibit, and Hα emission lines remain both a hallmark observational feature and one of the key diagnostics in determining the physical conditions within the disk.
In the first chapter of this thesis, we investigate the possible role of line-driven winds in disk formation. To test if line-driven winds could supply enough material to account for the equatorial disk, we check for the presence of Hα emission in the models …
Organic Solar Cells: Electrodes, Performance Enhancement And Degradation Mechanisms, Reginald J. Bauld
Organic Solar Cells: Electrodes, Performance Enhancement And Degradation Mechanisms, Reginald J. Bauld
Electronic Thesis and Dissertation Repository
In this thesis I focus on a number of aspects associated with the fabrication and characterization of organic photovoltaics. Specifically, my work focuses on evaluating solution processed graphene electrodes for use in organic photovoltaics, improving the performance of indium tin oxide transparent contacts by coating them with Au nanoparticles, and understanding the degradation pathways of Poly(3-hexylthiophene-2,5-diyl): Phenyl-C61-butyric acid methyl ester (P3HT:PCBM) organic solar cells. In my work on graphene electrodes for organic solar cells I worked out a relationship between the sheet resistance and the film transmittance that is useful to optimize such electrodes. Investigation of organic solar cell degradation …
Facilitating Natural Conversational Agent Interactions: Lessons From A Deception Experiment, Ryan M. Schuetzler, Mark Grimes, Justin Scott Giboney, Joesph Buckman
Facilitating Natural Conversational Agent Interactions: Lessons From A Deception Experiment, Ryan M. Schuetzler, Mark Grimes, Justin Scott Giboney, Joesph Buckman
Information Systems and Quantitative Analysis Faculty Proceedings & Presentations
This study reports the results of a laboratory experiment exploring interactions between humans and a conversational agent. Using the ChatScript language, we created a chat bot that asked participants to describe a series of images. The two objectives of this study were (1) to analyze the impact of dynamic responses on participants’ perceptions of the conversational agent, and (2) to explore behavioral changes in interactions with the chat bot (i.e. response latency and pauses) when participants engaged in deception. We discovered that a chat bot that provides adaptive responses based on the participant’s input dramatically increases the perceived humanness and …
Identification Of Groundwater Sources For Municipal Wells Using Geochemical Data On The Platte Alluvial Aquifer And Underlying Limestone At The Lincoln Water Well Field Near Ashland Nebraska, Juanita Cruz Torres
Department of Earth and Atmospheric Sciences: Dissertations, Theses, and Student Research
Alluvial aquifer systems where pumping of municipal wells induces recharge from the adjacent river are the primary source of water for many cities. The city of Lincoln, NE has a primary water source in an alluvial aquifer adjacent to the Platte River. The Lincoln Water System manages the stream/aquifer system by using integrated models for a better understanding during periods of high stress such as a drought. The integrated models set the limestone aquifer as an impermeable boundary to understand the alluvial aquifer system without having a secondary water source. The limestone aquifer is permeable and the purpose of this …
Decision Support Tools To Address Climate Change: Climate Model - Land Surface Models, Zea Mays L. (Corn) Phenology And Evapotranspiration-Yield Sensitivity Models For Nebraska, Usa., Jane A. Okalebo
School of Natural Resources: Dissertations, Theses, and Student Research
Nebraska's climate is highly variable and is expected to change in the future with anthropogenic global warming (AGW), resulting in warmer spring and summer temperatures coupled with more erratic rainfall events. This has strong implications for agriculture in the region, yet it is not clear that current modeling and decision-support tools are adequate to address these looming changes and provide planning, mitigation and adaptation strategies. To address climate change and its implications to agriculture in Nebraska, a set of robust decision support tools are very crucial. This study herein are divided into three chapters, with each chapter addressing a specific …
A Price-Volume Model For A Single-Period Stock Market, Yun Chen-Shue
A Price-Volume Model For A Single-Period Stock Market, Yun Chen-Shue
HIM 1990-2015
The intention of this thesis is to provide a primitive mathematical model for a financial market in which tradings affect the asset prices. Currently, the idea of a price-volume relationship is typically used in the form of empirical models for specific cases. Among the theoretical models that have been used in stock markets, few included the volume parameter. The thesis provides a general theoretical model with the volume parameter for the intention of a broader use. The core of the model is the correlation between trading volume and stock price, indicating that volume should be a function of the stock …
Scattering Amplitudes In Flat Space And Anti-De Sitter Space, Savan Kharel
Scattering Amplitudes In Flat Space And Anti-De Sitter Space, Savan Kharel
Doctoral Dissertations
We calculate gauge theory one-loop amplitudes with the aid of the complex shift used in the Britto- Cachazo-Feng-Witten (BCFW) recursion relations of tree amplitudes. We apply the shift to the integrand and show that the contribution from the limit of infinite shift vanishes after integrating over the loop momentum, with a judicious choice of basis for polarization vectors. This enables us to write the one-loop amplitude in terms of on-shell tree and lower-point one-loop amplitudes. Some of the tree amplitudes are forward amplitudes. We show that their potential singularities do not contribute and the BCFW recursion relations can be applied …
Social Fingerprinting: Identifying Users Of Social Networks By Their Data Footprint, Denise Koessler Gosnell
Social Fingerprinting: Identifying Users Of Social Networks By Their Data Footprint, Denise Koessler Gosnell
Doctoral Dissertations
This research defines, models, and quantifies a new metric for social networks: the social fingerprint. Just as one's fingers leave behind a unique trace in a print, this dissertation introduces and demonstrates that the manner in which people interact with other accounts on social networks creates a unique data trail. Accurate identification of a user's social fingerprint can address the growing demand for improved techniques in unique user account analysis, computational forensics and social network analysis.
In this dissertation, we theorize, construct and test novel software and methodologies which quantify features of social network data. All approaches and methodologies are …
Investigations Into Ambient Ionization Mechanisms: Electrospray Ionization And Direct Analysis In Real Time Mass Spectrometry, Stephen Colin Gibson
Investigations Into Ambient Ionization Mechanisms: Electrospray Ionization And Direct Analysis In Real Time Mass Spectrometry, Stephen Colin Gibson
Doctoral Dissertations
Mass spectrometry (MS) is an important tool for chemical analyses. Despite the MS requirement for generation of analyte gas-phase ions, many ion source designs afford little-to-no fragmentation, allowing characterization of intact molecules. However, this does not assure that detected ions are representative of the analytes’ natural state. Ionization mechanisms are generally complex and rarely fully understood. Fundamental research into these mechanisms provides greater insight into the relationship between solution chemistry and mass spectra. Work herein addresses aspects of two ambient ionization mechanisms: electrospray ionization (ESI) and Direct Analysis in Real Time (DART).
Ions produced by ESI are dispersed into a …
Elucidating Fundamental Mechanisms In Focused Electron- And Ion-Beam Induced Synthesis, Carlos M. Gonzalez
Elucidating Fundamental Mechanisms In Focused Electron- And Ion-Beam Induced Synthesis, Carlos M. Gonzalez
Doctoral Dissertations
A focused electron beam deposition process (FEBID) coupled with in-situ infrared pulsed laser assist (LA-EBID) has been implemented for higher purity tungsten nanowires using W(CO)6 [tungsten hexacarbonyl] as parent precursor gas. Nanowires made of Co from Co2(CO)8 [dicobalt octacarbonyl] and Pt from MeCpPtIVMe3 [trimethyl methylcyclopentadienyl platinum] have also been realized by using inert focused ion beams of helium and helium and neon, respectively. In all cases, higher electrical conductivities, higher purities and larger grain sizes have been obtained when compared with preceding traditional additive edit techniques. These new approaches will make possible successful nanoscale direct-write …
Comparisons Of Point And Average Capillary Pressure - Saturation Functions For Porous Media, Samuel Clark Cropper
Comparisons Of Point And Average Capillary Pressure - Saturation Functions For Porous Media, Samuel Clark Cropper
Doctoral Dissertations
The relationship between the volume of water occupying pores in soil or rock and its energy state is called the capillary pressure–saturation function. This is an important hydrogeologic property needed for modeling multiphase flow and transport. Standard methods used to determine capillary pressure–saturation behavior produce volume averaged functions rather than point functions. Average functions can produce erroneous simulations in flow models. Analytical expressions permit extraction of point functions from average functions, and predictions of average functions from point function parameters. These concepts are discussed in Chapter I.
Chapter II compares average and point functions from centrifugation of Berea sandstone, glass …
Neutron Scattering Studies Of Phosphate Proton Conductors, Amal Bajes Al-Wahish
Neutron Scattering Studies Of Phosphate Proton Conductors, Amal Bajes Al-Wahish
Doctoral Dissertations
Proton ceramic fuel cells operating in the intermediate temperature range of 300-500 °C offer potentially revolutionary advantages over existing fuel cells because expensive noble metal catalysts would not be needed, and in situ reforming of liquid bio-fuels such as ethanol or methanol would be possible.The chief obstacle facing intermediate fuel cells is the lack of a suitable electrolyte in the operating temperature range. A good electrolyte is thermally and chemically stable, inexpensive, environmentally friendly, and has a proton conductivity on the order of 10-2 S cm-1 [Siemens per centimeter] at 400 °C. Acceptor-doped lanthanum orthophosphate is an …
Synthesis And Thermodynamic Analysis Of Volatile Beta-Diketone Complexes Of Select Lanthanides Via Gas-Phase Separations, Daniel Hanson
Synthesis And Thermodynamic Analysis Of Volatile Beta-Diketone Complexes Of Select Lanthanides Via Gas-Phase Separations, Daniel Hanson
Doctoral Dissertations
Rapid separation techniques for fission and activation products have long been desired to supplant the slow solution-based methodologies currently used. In this work, rare earth elements were derivatized with β [beta]-diketones to synthesize rare earth complexes with high volatility suitable for gas-phase separations. Rare earth elements samarium and dysprosium were combined with hfac (1,1,1,5,5,5-hexafluoro-2,4-pentadione) and fod (6,6,7,7,8,8,8-heptafluoro-2,2-dimethyl-3,5-octanedione) and analyzed using a gas-phase separation technique. Rare earth elements praseodymium and europium were combined with dpm (2,2,6,6-tetra-methyl-3,5-heptanedione) and similarly analyzed. Employing the data from the separations, the entropy (Δ [delta] S) and enthalpy (Δ [delta] H) of adsorption were evaluated mathematically based …
Nonlocal Polarization Interferometry And Entanglement Detection, Brian P. Williams
Nonlocal Polarization Interferometry And Entanglement Detection, Brian P. Williams
Doctoral Dissertations
At present, quantum entanglement is a resource, distributed to enable a variety of quantum information applications such as quantum key distribution, superdense coding, and teleportation. Necessarily, the distribution and characterization of entanglement is fundamental to its application. This dissertation details three research efforts to enable nonlocal entanglement detection, distribution, and characterization. Foremost of these efforts, we present the theory and demonstration of a nonlocal polarization interferometer capable of detecting entanglement and identifying Bell states statistically. This is possible due to the interferometer’s unique correlation dependence on the anti-diagonal elements of the density matrix, which have distinct bounds for separable states …
Photo-Switchable Control Of Membrane Properties Of Liposomes And Biochemical Processes, Andrew Michael Bayer
Photo-Switchable Control Of Membrane Properties Of Liposomes And Biochemical Processes, Andrew Michael Bayer
Doctoral Dissertations
Liposomes are promising agents for drug delivery. They have the ability to encapsulate therapeutic drugs, resulting in decreased toxicity and prolonged circulation time. However, many obstacles to achieving broad utility in liposomal drug delivery still exist, including the ability to control release of therapeutic drugs and modulate surface reactivity. A primary focus of this dissertation involves the development of synthetic photocleavable lipids for controlled release from membranes.
Phosphatidylcholine (PC) is a natural lipid that comprises the majority of structural membranes. It contributes heavily to the formation of lipid bilayers in cell membranes, and modifications to the bilayer can induce membrane …
Computational Studies For Optimization And Design Of Extracting Agents For Separation Of Lanthanides And Actinides, Deborah Andrea Penchoff
Computational Studies For Optimization And Design Of Extracting Agents For Separation Of Lanthanides And Actinides, Deborah Andrea Penchoff
Doctoral Dissertations
Rare earths and actinides are of great interest given their varied applications in energy conversion and storage, such as in catalysis and batteries, and for advanced technological applications related to optical and magnetic properties (including electronics and automotive), amongst others. Many of the rare earth elements are considered endangered species due to their unique properties which have no clear alternatives that will maintain performance for important applications. The optimal approach is to find readily available alternatives for critical materials to ensure a certain standard of living and quality of life for future generations, but it is very likely that reusing …
Bayesian Estimation Of Asymmetric Jump-Diffusion Processes, Samuel J. Frame, Cyrus A. Ramezani
Bayesian Estimation Of Asymmetric Jump-Diffusion Processes, Samuel J. Frame, Cyrus A. Ramezani
Statistics
The hypothesis that asset returns are normally distributed has been widely rejected. The literature has shown that empirical a<>set returns are highly skewed and Ieptokurtic. The affine jump-diffusion (AJD) model improves upon the normal specification by adding a jump component to the price process. Two important extensions proposed by Ramezani and Zeng (1998) and Kou (2002) further improve the AJD specification by having two jump components in the price process, resulting in the asymmetric affine jump-diffusion (AAJD) specification. The AAJD specification allows the probability distribution of the returns to be asymmetrical. That is, the tails of the distribution are …
Fresh Bytes - Connected Hydroponics For Small-Scale Growing, Jack Bowen
Fresh Bytes - Connected Hydroponics For Small-Scale Growing, Jack Bowen
Liberal Arts and Engineering Studies
Many users are now transitioning to small-scale hydroponics and aquaponics at home. There can be a barrier to entry with these systems as there is a delicate balance of chemicals, pH, etc. that must be maintained. There are sensors for these various components but they are either aimed at commercial production or are un-automated. Fresh Bytes is a microcomputer with sensors to detect all of these unseen components in a hydroponic system. A prototype of this microcomputer is produced along with CAD plans for more professional versions of it. The sensors are verified and future development is contemplated.
Viewing The Moon In Infrared, Kyle Beekman
Viewing The Moon In Infrared, Kyle Beekman
Statistics
Man has been fascinated by the heavens since ancient times, yet there is still so much that we don’t know. This project was created by Dr. Gary Hughes with goal of obtaining information about the moon and other objects in the vicinity of the Earth. The project was mostly experimental in nature and there was no specific goal at the outset of the project. In the end the project focused on the moon and meteors that traveled through the Earth’s upper atmosphere. Throughout the month of August, students traveled to the Mount Barcroft Research Station in the Eastern Sierras to …
Analyzing Alcohol Behavior In San Luis Obispo, Ariana Montes
Analyzing Alcohol Behavior In San Luis Obispo, Ariana Montes
Statistics
No abstract provided.
Determination Of Seasonal Crop Coefficients For The Cal Poly Campus Vineyard Using The “Paso Panel”, Daniel L. Vyenielo
Determination Of Seasonal Crop Coefficients For The Cal Poly Campus Vineyard Using The “Paso Panel”, Daniel L. Vyenielo
Wine and Viticulture
Seasonal Crop Coefficients were determined using the "Paso Panel" during the summer of 2014 at the Cal Poly Trestle Vineyard in the Pinot and Syrah blocks.
Nippon Foundation / Gebco Indian Ocean Bathymetric Compilation Project, Rochelle A. Wigley, Norhizam Hassan, Mohammad Chowdhury, Roshan Ranaweera, Xinh Le Sy, Hemanaden Runghen, Jan Erik Arndt
Nippon Foundation / Gebco Indian Ocean Bathymetric Compilation Project, Rochelle A. Wigley, Norhizam Hassan, Mohammad Chowdhury, Roshan Ranaweera, Xinh Le Sy, Hemanaden Runghen, Jan Erik Arndt
Center for Coastal and Ocean Mapping
The Indian Ocean Bathymetric Compilation (IOBC) project, undertaken by Nippon Foundation / GEBCO Scholars, is focused on building a regional bathymetric data compilation, of all publically-available bathymetric data within the Indian Ocean region from 30°N to 60° S and 10° to 147° E. One of the objectives of this project is the creation of a network of Nippon Foundation / GEBCO Scholars working together, derived from the thirty Scholars from fourteen nations bordering on the Indian Ocean who have graduated from this Postgraduate Certificate in Ocean Bathymetry (PCOB) training program training program at the University of New Hampshire. The IOBC …
A Markov Model For Baseball With Applications, Daniel Joseph Ursin
A Markov Model For Baseball With Applications, Daniel Joseph Ursin
Theses and Dissertations
In this work we confirm a Markov chain model of baseball for 2013 Major League Baseball batting data. We describe the transition matrices for individual player data and their use in generating single and nine-inning run distributions for a given lineup. The run distribution is used to calculate the expected number of runs produced by a lineup over nine innings. We discuss batting order optimization heuristics to avoid computation of distributions for the 9! = 362, 880 distinct lineups for 9 players. Finally, we describe an implementation of the algorithms and review their performance against actual game data.