Physical Sciences and Mathematics Commons^™

ผลกระทบที่เกิดขึ้นในย่านสยามสแควร์ จากกรณีการชุมนุมที่ราชประสงค์, เสถียร รุจิรวนิช

Thai Environment

No abstract provided.

สรุปผลกระทบด้านสิ่งแวดล้อมจากการชุมนุม, ทวีวงศ์ ศรีบุรี

Thai Environment

No abstract provided.

Synoptic Typing Of Extreme Cool-Season Precipitation Events At St. John's, Newfoundland, 1979-2005, Shawn M. Milrad, Eyad H. Atallah, John R. Gyakum

Publications

Quantitative precipitation forecasting (QPF) continues to be a significant challenge in operational forecasting, particularly in regions susceptible to extreme precipitation events. St. John’s, Newfoundland, Canada (CYYT), is affected frequently by such events, particularly in the cool season (October–April).

The 50 median events in the extreme (>33.78 mm during a 48-h period) precipitation event category are selected for further analysis. A manual synoptic typing is performed on these 50 events, using two separate methodologies to partition events. The first method utilizes a Lagrangian backward air parcel trajectory analysis and the second method utilizes the evolution of dynamically relevant variables, including …

Section Abstracts: Statistics

Virginia Journal of Science

Abstracts of the Statistics Section for the 88th Annual Meeting of the Virginia Academy of Science, May 20-21, 2010, James Madison University, Harrisonburg, Virginia.

Characterization Of Glycation Sites On Human Serum Albumin Using Mass Spectrometry, Omar S. Barnaby

Department of Chemistry: Dissertations, Theses, and Student Research

The modification of proteins by reducing sugars is a process that occurs naturally in the body. This process, which is known as glycation, has been linked to many of the chronic complications encountered during diabetes. Glycation has also been linked to changes in the binding of human serum albumin (HSA) to several drugs and small solutes in the body. While these effects are known, there is little information that explains why these changes in binding occur. The goal of this project was to obtain qualitative and quantitative information about glycation that occurs on HSA. The first section of this dissertation …

Functionalization Of Aromatic Organic Molecules By Anhydrous Flourides And By Reductive Elimination Of Iodine(Iii), Bijia Wang

Department of Chemistry: Dissertations, Theses, and Student Research

Solution phase reactivity of nucleophilic fluoride reagents is attenuated by ion-pairing interactions. ¹H-¹⁹F HOESY competition experiments permit generation of a fluoride ion affinity scale in the weak-binding regime. Direct DFT calculations of ion pair interaction energies as well as calculated cation electrostatic potential maps can be used to predict solution phase ion pairing tendencies for closely related ammonium cations. It was found by studying the decomposition of tetra-substituted ammonium cations by fluoride that: 1) rates of E2 decomposition is faster than the S_N2 pathway; 2) aryl substituents destabilize the cations; 3) steric strain tends to …

Optical Properties Of Type Iii-V Semiconductor Spherical Quantum Dot Heterostructures, Nathan Haluska

Master's Theses - Daytona Beach

In recent years quantum dots (QD) have attracted increasing interest because of their wide variety of revolutionary applications. Such applications include high speed optical communication lasers, infrared photodetectors, and single photon emitters. One promising immediate application is QD solar cells. Proper analysis of the optical absorption characteristics in these solar cells requires a rigorous modeling of the electronic structure and optical properties of semiconductor heterostructures. Our emphasis will be on type III-V semiconductors. Such structures, have a great potential for increasing efficiencies, but they also possess highly degenerate and complex valence band structures. Therefore, we seek to develop a model …

Synergistic Effect Of Carbon Nanotubes And Decabromodiphenyl Oxide/Sb2O3 In Improving The Flame Retardancy Of Polystyrene, Hongdian Lu, Charles A. Wilkie

Chemistry Faculty Research and Publications

Brominated flame retardant polystyrene composites were prepared by melt blending polystyrene, decabromodiphenyl oxide, antimony oxide, multi-wall carbon nanotubes and montmorillonite clay. Synergy between carbon nanotubes and clay and the brominated fire retardant was studied by thermogravimetric analysis, microscale combustion calorimetry and cone calorimetry. Nanotubes are more efficient than clay in improving the flame retardancy of the materials and promoting carbonization in the polystyrene matrix. Comparison of the results from the microscale combustion calorimeter and the cone calorimeter indicate that the rate of change of the peak heat release rate reduction in the microscale combustion calorimeter was slower than that in …

Exploring Mitigation Options To Reduce Vehicle-Caused Mortality For The Oregon Silverspot Butterfly, Speyeria Zerene Hippolyta, Along Highway 101 At The Siuslaw National Forest, Sara B. Zielin

Environmental Science and Management Professional Master's Project Reports

The Oregon Silverspot Butterfly (OSB), Speyeria zerene hippolyta, is federally listed as "threatened." It historically inhabited coastal regions of Washington, Oregon, and California (USFWS 2001). OSB populations only remain at five sites, four of which are in Oregon; one remaining population is in California, and none exist in Washington state as they have been extirpated (BFCI 2009; USFWS 2001). The site selected for this study was Rock Creek-Big Creek, adjacent to the Siuslaw National Forest. At this site OSB habitat is bisected by Highway 101; butterflies are observed to use both sides of the highway throughout their life cycle. …

C - Reactive Protein Induced Rearrangement Of Phosphatidylcholine On Nanoparticle Mimics Of Lipoprotein Particles, Marilyn R. Mackiewicz, Heather L. Hodges, Scott M. Reed

Chemistry Faculty Publications and Presentations

Lipid-coated metal nanoparticles are developed here as a mimic of low-density lipoprotein (LDL) particles and used to study C-reactive protein (CRP) binding to highly curved lipid membranes. A 12 nm shift in the localized surface plasmon resonance (LSPR) was observed when CRP was added to the lipid-coated gold nanoparticles. Transmission electron microscopy (TEM) revealed that CRP induced a structural change to the lipids, resulting in clusters of nanoparticles. This clustering provides a visualization of how CRP could cause the aggregation of LDL particles, which is a key step in atherosclerosis. The cluster formation and resultant LSPR shift requires the presence …

Cold War Origins Of The International Federation For Information Processing, Ksenia Tatarchenko

Research Collection College of Integrative Studies

The International Federation for Information Processing (IFIP) was born as a nongovernmental federation with the main goal of bringing together computer professionals from countries in the East and West. This article examines the Cold War context of the IFIP's origins and the mechanisms its founders used to reconcile computing and politics and to construct computing as an international discipline.

Shifting Inference Control To User Side: Architecture And Protocol, Yanjiang Yang, Yingjiu Li, Robert H. Deng, Feng Bao

Research Collection School Of Computing and Information Systems

Inference has been a longstanding issue in database security, and inference control, aiming to curb inference, provides an extra line of defense to the confidentiality of databases by complementing access control. However, in traditional inference control architecture, database server is a crucial bottleneck, as it enforces highly computation-intensive auditing for all users who query the protected database. As a result, most auditing methods, though rigorously studied, are not practical for protecting large-scale real-world database systems. In this paper, we shift this paradigm by proposing a new inference control architecture, entrusting inference control to each user's platform that is equipped with …

Finding Influentials Based On The Temporal Order Of Information Adoption In Twitter, Changhyun Lee, Haewoon Kwak, Hosung Park, Sue Moon

Research Collection School Of Computing and Information Systems

Twitter offers an explicit mechanism to facilitate information diffusion and has emerged as a new medium for communication. Many approaches to find influentials have been proposed, but they do not consider the temporal order of information adoption. In this work, we propose a novel method to find influentials by considering both the link structure and the temporal order of information adoption in Twitter. Our method finds distinct influentials who are not discovered by other methods.

What Is Twitter, A Social Network Or A News Media?, Haewoon Kwak, Changhyun Lee, Hosung: Moon Park

Research Collection School Of Computing and Information Systems

Twitter, a microblogging service less than three years old, commands more than 41 million users as of July 2009 and is growing fast. Twitter users tweet about any topic within the 140-character limit and follow others to receive their tweets. The goal of this paper is to study the topological characteristics of Twitter and its power as a new medium of information sharing.We have crawled the entire Twitter site and obtained 41.7 million user profiles, 1.47 billion social relations, 4,262 trending topics, and 106 million tweets. In its follower-following topology analysis we have found a non-power-law follower distribution, a short …

Mashup Environments In Software Engineering, Lars Grammel, Christoph Treude, Margaret-Anne Storey

Research Collection School Of Computing and Information Systems

Too often, software engineering (SE) tool research is focused on creating small, stand-alone tools that address rarely understood developer needs. We believe that research should instead provide developers with flexible environments and interoperable tools, and then study how developers appropriate and tailor these tools in practice. Although there has been some prior work on this, we feel that flexible tool environments for SE have not yet been fully explored. In particular, we propose adopting the Web 2.0 idea of mashups and mashup environments to support SE practitioners in analytic activities involving multiple information sources.

Generating Synonyms Based On Query Log Data, Stelios Paparizos, Tao Cheng, Hady W. Lauw

Research Collection School Of Computing and Information Systems

An approach is described for generating synonyms to supplement at least one information item, such as, in one case, a set of related items. The approach can involve an expansion phase, a clean-up phase, and a reduction phase. In the expansion phase, the approach identifies, for each related item, a set of initial synonym candidates. In the clean-up phase, the approach removes noise from the set of initial synonym candidates (if such noise exists), to provide a set of filtered synonym candidate items. In the reduction phase, the approach ranks and applies a threshold (or thresholds) to the set of …

Centers For Renewable Energy & Biomass Utilization, University Of North Dakota. Energy And Environmental Research Center

EERC Brochures and Fact Sheets

Brochure on the Energy & Environmental Research Center's (EERC's) Centers for Renewable Energy & Biomass Utilization, funded in part by the U.S. Department of Energy. Outlines EERC capabilities and the Centers' areas of expertise.

The Role Of The Alaskan Stream In Modulating The Bering Sea Climate, Tal Ezer, Lie-Yauw Oey

CCPO Publications

A numerical ocean circulation model with realistic topography, but with an idealized forcing that includes only lateral transports is used to study the role of the Alaskan Stream (AS) in modulating the Bering Sea (BS) variability. Sensitivity experiments, each one with a different strength of the AS transport reveal a nonlinear BS response. An increase of AS transport from 10 to 25 Sv causes warming (similar to 0.25 degrees C mean, similar to 0.5 degrees C maximum) and sea level rise in the BS shelf due to increased transports of warmer Pacific waters through the eastern passages of the Aleutian …

Free Trade And Sustainability Through The Lens Of Nicaragua: How Cafta-Dr Should Be Amended To Promote The Triple Bottom Line, Paulette L. Stenzel

William & Mary Environmental Law and Policy Review

No abstract provided.

Priceline For Pollution: Auctions To Allocate Public Pollution Control Dollars, Robert W. Adler

William & Mary Environmental Law and Policy Review

No abstract provided.

Section Abstracts: Astronomy, Mathematics, And Physics & Materials Science

Virginia Journal of Science

Abstracts of papers of the Astronomy, Mathematics, and Physics (Including Materials Science) Section for the 88th Annual Meeting of the Virginia Academy of Science, May 20-21, 2010, James Madison University, Harrisonburg, VA.

Corrections To The Paper "Phytoplankton Productivity In The Tidal Regions Of Four Chesapeake Bay (Usa) Tributaries." Virginia Journal Of Science. 2007 58(4): 191-204, By K. K. Nesius, H. G. Marshall, And T.A. Egerton

Virginia Journal of Science

Necessary corrections associated with the paper "Phytoplankton productivity in the tidal regions of four Chesapeake Bay (USA) tributaries", originally published in Virginia Journal of Science Volume 58, Number 4, pages 191-204, in 2007, by K.K. Nesius, H.G. Marshall, and T.A. Egerton.

A Raman Spectroscopy Study Of The Solubilisation Of Swcnts By Polycyclic Aromatic Hydrocarbons, Sourabhi Debnath, Qiaohuan Cheng, Theresa Hedderman, Hugh Byrne

Articles

The effectiveness of polycyclic aromatic hydrocarbons (PAHs) for selective solubilisation of single walled carbon nanotubes (SWCNTs) has been studied by Raman spectroscopy. Polyphenyl and polyacene PAHs of different lengths are used. Selective interaction between the PAHs and SWCNT is investigated by analyzing the Raman radial breathing modes the frequency positioning of which yields information concerning the diameter distribution of the SWCNT sample. Samples were dispersed at concentrations below the debundling limit and deposited on quartz substrates. A combination of four laser excitation energies was utilized to establish the distribution of diameters present. The results show that the PAHs interact with …

Evaluation Of The National Hurricane Center’S Tropical Cyclone Wind Speed Probability Forecast Product, Michael E. Splitt, Jaclyn A. Shafer, Steven M. Lazarus, William P. Roeder

Ocean Engineering and Marine Sciences Faculty Publications

A tropical cyclone (TC) wind speed probability forecast product developed at the Cooperative Institute for Research in the Atmosphere (CIRA) and adopted by the National Hurricane Center (NHC) is evaluated for U.S. land-threatening and landfalling events over four hurricane seasons from 2004 to 2007. A key element of this work is the discernment of risk associated with the interval forecast probabilities for the three wind speed categories (i.e., 34, 50, and 64 kt, where 1 kt = 0.52 m s−1). A quantitative assessment of the interval probabilities (0–12, 12–24, 24–36, 36–48, 48–72, 72–96, and 96–120 h) is conducted by converting …

“Taking Stocc”: Tracking Environmental And Financial Footprints Associated With Municipal Energy Use, Corey Johnson

Inquiry Journal 2010

No abstract provided.

Coupling Into Waveguide Evanescent Modes With Applications In Electron Paramagnetic Resonance, Jason Walter Sidabras

Master's Theses (2009 -)

The use of analytical and numerical techniques in solving the coupling of evanescent modes in a microwave waveguide through slots can be optimized to create a uniform magnetic field excitation on axis within a waveguide. This work has direct applications in Electron Paramagnetic Resonance (EPR) where a 100~kHz time-varying magnetic field is incident on a sample contained in a microwave cavity. Typical cavity designs do not take into consideration the uniformity of the 100~kHz field modulation and assume it to be uniform enough over the sample region from quasi-static principles. This work shows otherwise and uses Ansoft (Pittsburgh, PA) High …

Detecting Malicious Javascript, Matthew F. Der

Honors Theses

The increased use of the World Wide Web and JavaScript as a scripting language for Web pages have made JavaScript a popular attack vector for infecting users' machines with malware. Additionally, attackers often obfuscate their code to avoid detection, which heightens the challenge and complexity of automated defense systems. We present two analyses of malicious scripts and suggest how they could be extended into intrusion detection systems. For our analyses we use a sample of deobfuscated malicious and benign scripts collected from actual Web sites. First, using our malicious sample, we perform a manual analysis of attack signatures, identifying four …

Search For The Standard Model Higgs Boson In P-Pbar Interactions With The Decay Mode H -> W+ W- -> Mu+ Nu Mu- Nu At The D0 Experiment, Dale M. Johnston

Department of Physics and Astronomy: Dissertations, Theses, and Student Research

A search for the standard model Higgs boson in p-pbar collisions resulting in two muons and large missing transverse energy is presented. The analysis uses 4.2 fb-1 of integrated luminosity at a center-of-mass energy of sqrt(s) = 1.96 TeV collected between April 2002 and December 2008 with the D0 detector at the Fermilab Tevatron collider. No significant excess above the background estimation is observed and limits are derived on Higgs boson production.

Section Abstracts: Chemistry

Virginia Journal of Science

Abstracts of the Chemistry Section for the 88th Annual Meeting of the Virginia Academy of Science, May 20-21, 2010, James Madison University, Harrisonburg, VA.

Lorentz Violation And Gravity, Quentin G. Bailey

Publications

In the last decade, a variety of high-precision experiments have searched for miniscule violations of Lorentz symmetry. These searches are largely motivated by the possibility of uncovering experimental signatures from a fundamental unified theory. Experimental results are reported in the framework called the Standard-Model Extension (SME), which describes general Lorentz violation for each particle species in terms of its coefficients for Lorentz violation. Recently, the role of gravitational experiments in probing the SME has been explored in the literature. In this talk, I will summarize theoretical and experimental aspects of these works. I will also discuss recent lunar laser ranging …