Browsing College of Science by Issue Date

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Tidal Freshwater Potomac River Eutrophication: Patterns and Relations to Climate Change, Nutrient Management and In Situ Factors

Sklarew, Daniel M. (2000-05-15)

Eutrophication, the transition of an aquatic ecosystem from nutrient-scarce to nutrient enriched conditions, is a water quality concern for rivers and coastal zones globally. The tidal freshwater (TFW) Potomac River, in ...
New Unit Root Tests to Decrease Spurious Results with Applications in Finance and Temperature Anomalies

Herranz, Edward (2006)

Simulation studies show that when testing for cointegration with pairs of independent explosive($\gls{phi1} >1$) AR(1) time series almost invariably lead to spurious cointegrating relationships. A new unit root test, the ...
An Analysis of the Potential Direct or Indirect Influence Exerted by an Al Qaeda Social Network Actor on Future Biological Weapon Mission Planning

Baken, Denise (2007-11-21)

The current conflict known as the “War on Terror” pits several sovereign states (United States and its Allies) against a non-state entity. This entity, al Qaeda, is a global social network with religious doctrine adherence ...
Multi-Objective Optimization of Blast Simulation Using Surrogate Model

Tsuga, Toshihiro (2007-12-12)

A multi objective optimization approach using a Kriging model coupled with a Multi Objective Genetic Algorithm (MOGA) is applied to a blast damage maximization problem composed of two objectives, namely number of casualties ...
Comparative Profiling of Circulatory Levels of Adipokines and Cytokines in Patients With Various Types of Non Alcoholic Fatty Liver Disease

Jarrar, Mohammed (2007-12-14)

Non-alcoholic fatty liver disease (NAFLD) is the hepatic manifestation of metabolic syndrome and the most common cause of liver disease. The NAFLD spectrum ranges from simple benign steatosis to NASH to fibrosis and ...
Genetic Structure and Phylogeography of the Fox Squirrel, Sciurus niger, as Inferred From a Mitochondrial Gene

Bryant, Katherine (2007-12-14)

Sciurus niger (Rodentia: Sciuridae) is a large tree squirrel which inhabits the southeastern portion of North America. Currently there are ten recognized subspecies which are distinguished based on differences in morphology ...
Manganese Enhanced Functional Magnetic Resonance Imaging of Endogenous Pancreas and Isolated Human Islets

Haque, Muhammad (2007-12-17)

It is well established that diabetes is of critical importance in the world as the number of people affected increases globally. Although a great deal is known about the pancreas and its function, there are still unanswered ...
Comparisons of Gene Expression Patterns in Progressive Breast Carcinoma and the Adjacent Stromal Microenvironment

King, John (2007-12-19)

Human breast ductal carcinoma in situ (DCIS) is categorized as Stage 0 because it is noninvasive and limited to the duct lining. However, women diagnosed with DCIS have a 30-40% chance of developing invasive breast cancer ...
The Geography of Significant Colorants: Antiquity to the Twentieth Century

Zagorski, Melissa (2007-12-19)

This thesis attempts to answer the question: Where does color come from? In order to answer this question, a rigorous analysis of art-related, chemical, scientific, and geographical literature was required in order to ...
Day to Day Longitudinal Variability of the Nighttime Low Latitude Terrestrial Ionosphere

McDonald, Sarah (2007-12-19)

The Earth’s ionosphere is the region of upper atmosphere that is a partially ionized gas. It extends from the mesosphere and through the thermosphere to altitudes ~1000 km where it ultimately merges with the magnetosphere. ...
Who’s Afraid of the Big, Bad Coyote? A Survey of Messaging and Existing Attitudes in the National Capital Region

Draheim, Megan (2008-01-30)

Coyotes are relatively recent arrivals to the Washington, D.C. metropolitan area. In an effort to understand and obtain baseline data about existing attitudes, a survey was conducted in 2006. Most respondents had neutral ...
Computational Mutagenesis Models for Protein Activity and Stability Analysis

Zhan, Bill (2008-01-30)

Missense mutations may cause structural alterations of a protein and lead to a loss/gain of activity and stability. Studies of missense mutations in proteins are important for understanding protein structure-function ...
Remote Sensing Techniques for Soil Moisture and Agricultural Drought Monitoring

Wang, Lingli (2008-02-28)

Drought is the most complex and least understood of all natural hazards, affecting more people than any other hazard. Soil moisture is a primary indicator for agricultural drought. This dissertation is aimed at evaluating ...
Development of a Gas-phase Chemiluminescence Detection System for the Measurement of Arsenic in Environmental and Biological Samples

Assegid, Kirubel (2008-05-07)

Arsenic in groundwater used for drinking is now regarded as one of the most serious health hazards of this decade. Long term exposure to low concentrations of arsenic has been reported to cause cancer of the skin, ...
Assessment of Potential Relationships Between Microclimate Variables Measured Within a Forest Patch and the Presence of Interior Forest Birds

Farabaugh, Christopher Scott (2008-05-16)

Research was conducted over three field seasons in isolated eastern deciduous forest patches of three different sizes (~10, ~90, and ~300 hectares) in Loudoun and Prince William Counties in Virginia, to determine if there ...
A Dynamic Graph Model for Representing Streaming Text Documents

Hohman, Elizabeth Leeds (2008-06-05)

This work presents new techniques for representing an evolving stream of text documents. Text processing is traditionally performed on a fixed corpus of documents by representing the documents as vectors in a high-dimensional ...
A Numerical Study of Topographical Effects on Flow Regimes in the Lower Atmosphere

Lindeman, John David (2008-06-05)

Orographically generated gravity waves, or mountain waves, have been the focus of much research for decades because of their importance on the general mean atmospheric circulation. These waves affect the flow on scales ...
Trace Gas Detection in Hyperspectral Imagery Using the Wavelet Packet Subspace

Salvador, Mark A. Z. (2008-06-06)

This dissertation describes research into a new remote sensing method to detect trace gases in hyperspectral and ultra-spectral data. This new method is based on the wavelet packet transform. It attempts to improve both ...
The Association of Tall Eyewall Convection with Tropical Cyclone Intensification

Kelley, Owen A. (2008-06-11)

Despite decades of research, operational weather agencies still find it difficult to predict change in the intensity of a tropical cyclone's surface wind. This dissertation examines whether precipitation cells in a ...

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