Physical Sciences and Mathematics Commons^™

Quantifying Meltwater Refreezing Along A Transect Of Sites On The Greenland Ice Sheet, C. Cox, N. Humphrey, Joel T. Harper

Geosciences Faculty Publications

On the Greenland ice sheet, a significant quantity of surface meltwater refreezes within the firn, creating uncertainty in surface mass balance estimates. This refreezing has the potential to buffer seasonal runoff to future increases in melting, but direct measurement of the process remains difficult. We present a method for quantifying refreezing at point locations using in situ firn temperature observations. A time series of sub-hourly firn temperature profiles were collected over the course of two melt seasons from 2007 to 2009 along a transect of 11 sites in the accumulation zone of Greenland. Seasonal changes in temperature profiles combined with …

Medicare: Program, Procedures And Recommendations, Sarah Wyman

Honors Theses

My thesis is formatted in the style of a political brief, based upon the program Medicare. This report discusses the question of whether the Medicare program is performing effectively. It discusses the origins and development of Medicare, its mission and reason for the program. Included is the staffing of the Centers for Medicare and Medicaid Services, a center within the Department of Health and Human Services. It discusses the historical, current, and projected funding through FY 2015. Most notably it contains the program performance ratings of Medicare from the White House, CBO, OMB, and CMS. Medicare is a program that …

Flavour Chemicals In Electronic Cigarette Fluids, Peyton A. Tierney, Clarissa D. Karpinski, Jessica E. Brown, Wentai Luo, James F. Pankow

Chemistry Faculty Publications and Presentations

Background: Most e-cigarette liquids contain flavour chemicals. Flavour chemicals certified as safe for ingestion by the Flavor Extracts Manufacturers Association may not be safe for use in e-cigarettes. This study identified and measured flavour chemicals in 30 e-cigarette fluids.

Methods: Two brands of single-use e-cigarettes were selected and their fluids in multiple flavour types analysed by gas chromatography/mass spectrometry. For the same flavour types, and for selected confectionary flavours (eg, bubble gum and cotton candy), also analysed were convenience samples of e-cigarette fluids in refill bottles from local ‘vape’ shops and online retailers.

Results: In many liquids, total flavour chemicals …

Imidazolium Salts As Reaction Media For The Preparation Of Metal Halide Cluster Networks, Stephanie K. Gnewuch

Undergraduate Honors Thesis Projects

This study investigated two different schemes of imidazolium and carboxylate salts to assess their use in preparing metal halide cluster networks. The first scheme used salts of 1-ethyl-3-methylimidazolium [EMIM]⁺ and 1-butyl-3-methylimidazolium [BMIM]⁺ as the cations and benzene-1,3,5-tricarboxylate [TMA]-, benzene 1,3-dicarboxylate [IPA]-, and benzene-1,4-dicarboxylate [TPA]- as the anions. The anions are commonly used in porous inorganic materials synthesis, as the size of the cation has been shown to often impact the final structure of the materials. The anions are common bridging ligands used to create network solids. The second scheme used 1,3-dimethylimidazolium triflate [DMIM]⁺ [OTf]^- and sodium …

Metal Cnt-M, New Materials And New Approaches To Microfabrication, Richard Vanfleet

Journal of Undergraduate Research

This Mentored Environment Grant (MEG) proposed to explore Carbon Nanotube Templated Microfabrication (CNT-M) approaches that used metal as the infiltration material. We proposed to focus on two specific metal systems; traditionally electrodeposited metals such as nickel and high atomic number metals like tungsten which in many cases cannot be electroplated. Our two objectives were:

Linking Hematite (Uth)/He Dating With The Microtextural Record Of Seismicity In The Wasatch Fault Damagezone, Utah, Usa, Alexis K. Ault, Peter W. Reiners, James P. Evans, Stuart N. Thomson

Geosciences Faculty Publications

Techniques directly dating fault slip are few, limiting the ability to interpret the rock record of seismicity. Hematite is commonly found in fault zones, amenable to (U-Th)/He dating, and slip surface hematite may be reset by shear heating events and/or recrystallization. Glossy hematite-coated fault surfaces in the Wasatch fault footwall damage zone, Utah (USA), exhibit evidence of hematite cataclasis and preserve Pliocene hematite (U-Th)/He dates. Apatite (U-Th)/He and fission track data from the host gneiss indicate footwall unroofing through ∼2 km by ca. 4.5 Ma. Internally reproducible but disparate hematite (U-Th)/He dates 4.5 Ma and younger from isolated locations on …

A Full-Wave Model For A Binary Gas Thermosphere: Effects Of Thermal Conductivity And Viscosity, Michael P. Hickey Ph.D., R. L. Walterscheid, G. Schubert

Publications

The thermosphere is diffusively separated and behaves as a multiconstituent gas wherein individual species in static equilibrium are each stratified according to their individual scale heights. Gravity waves propagating in the thermosphere cause individual gases to oscillate with different amplitudes and phases. We use a two-gas (N2 and O) full-wave model to examine the roles of thermal conductivity, viscosity, and mutual diffusion on the wave-induced characteristics of both gases. In the lower thermosphere, where the gases are relatively tightly coupled, the major gas (N2) controls the minor gas (O) response. At higher altitudes, the gases become thermally and inertially decoupled, …

Development And Application Of Web-Based Open Source Drug Discovery Platforms, Yuri Pevzner

USF Tampa Graduate Theses and Dissertations

Computational modeling approaches have lately been earning their place as viable tools in drug discovery. Research efforts more often include computational component and the usage of the scientific software is commonplace at more stages of the drug discovery pipeline. However, as software takes on more responsibility and the computational methods grow more involved, the gap grows between research entities that have the means to maintain the necessary computational infrastructure and those that lack the technical expertise or financial means to obtain and include computational component in their scientific efforts. To fill this gap and to meet the need of many, …

Monitoring Relative Abundance Of American Shad And River Herring In Virginia Rivers 2014 Annual Report, Eric J. Hilton, Rob Latour, Brian Watkins, Ashleigh Magee

Reports

Concern about the decline in landings of American shad (Alosa sapidissima) along the Atlantic coast prompted the development of an interstate fisheries management plan (FMP) under the auspices of the Atlantic States Marine Fisheries Management Program (ASMFC 1999). Legislation enables imposition of federal sanctions on fishing in those states that fail to comply with the FMP. To be in compliance, coastal states are required to implement and maintain fishery-dependent and fishery-independent monitoring programs as specified by the FMP. For Virginia, these requirements include spawning stock assessments, the collection of biological data on the spawning run (e.g., age-structure, sex ratio, and …

Solving Ordinary Differential Equations Using Differential Forms And Lie Groups, Richard M. Shumate

Senior Honors Theses

Differential equations have bearing on practically every scientific field. Though they are prevalent in nature, they can be challenging to solve. Most of the work done in differential equations is dependent on the use of many methods to solve particular types of equations. Sophus Lie proposed a modern method of solving ordinary differential equations in the 19th century along with a coordinate free variation of finding the infinitesimal generator by combining the influential work of Élie Cartan among others in the field of differential geometry. The driving idea behind using symmetries to solve differential equations is that there exists a …

Public Participation In Planning In Nsw: Resilient Evolution Or Relapse?, Lynne Armitage, John Sheehan

Lynne Armitage

The Environmental Planning and Assessment Act 1979 and the Land and Environment Court Act 1979, comprise a legislative duo providing statutory control over the use of public and private property in the most populous state of Australia, New South Wales (NSW). Statutory planning in NSW arguably commenced in 1951 with the Cumberland Planning Scheme Ordinance which was in turn based upon pre-war English town and country planning, and is generally regarded as the foundation for much Australian planning. Since 1979 the NSW planning regime has matured into a complex exclusory zoning system, which has been further developed through case law …

How Visualization Can Improve The Understanding Of Mathematics, Mariah Martin

Undergraduate Research Conference

High school students have a difficult time taking the new End-Of-Course exams in math. Why are students having this difficulty? This could be because students lack the understanding of visualization in mathematics. Visualization can be helpful to certain students who think this way, while also confusing to those same students, and others as well. However, to what extent do high stakes tests, such as the End-Of-Course exams in Algebra I and II, incorporate mathematical visualization? How can visualization help improve the understanding of mathematics? This review will explain the advantages and disadvantages of incorporating visualization in these exams, how students …

Baseline Water Quality For Lanana Creek Within The Nacogdoches Area, Tania Benavides, Greg Hanson, Phillip Sharp

Undergraduate Research Conference

Lanana Creek is one of two springs that surround Nacogdoches, TX. Lanana Creek starts southwest of Lake Naconiche, conjoining with several other bodies of water along its path, and becomes part of the Angelina River. This body of water eventually ends in the Gulf of Mexico which may contribute to the dead zone. Contaminants in water may be of small concentration; however, prolonged exposure could produce many negative effects. To monitor future change in the creek, whether natural or human-induced, a baseline of targeted species for the creek waters must be established as a “snapshot” of the Nacogdoches Lanana Creek …

Analysis Of Accounting Wages Within The Largest Cities Of Texas, Zuleima Espino, Delyla Frederick, Allyson Gallier, Halee Morehead

Undergraduate Research Conference

No abstract provided.

Complementary Effect Of Electrical And Inhibitory Coupling In Bursting Synchronization, Kevin Daley

Georgia State Undergraduate Research Conference

gsurc 2015

Theoretical Differences: Exploring The Communication Barrier Between Anthropology And Physics Education Research, Laura Kiepura

Georgia State Undergraduate Research Conference

No abstract provided.

Courtship In The Borderlands: Hollistic Intimate Space Creation Within Courtship Ideaologies, Alejandro Sánchez

The Compass

While telling me the story of how she met her husband, Mrs. Aguilar told me “I really feel bad for your generation, they are missing out on falling in love.” She was referring to the courtship practices, or the social regulation and cultural markers between two individuals who create a social relation developing a “relationship.”1 She was comparingthe courtship practices of her generation to that of mine and her statement is reflective of the changes in the cultural environment. From courting, a “relationship” can develop. Its dimensions are defined by the mediation between cultural norms and the agent, and can …

Strategies For Leaders To Counter Social Loafing Through The Use Of Organizational Citizenship Behavior: A Literature Review, Richard Hildreth

The Compass

Social loafing (SL) is a counterintuitive phenomenon that describes a decrease of efficiency observed in both small groups and large organizations. Research over the past century has increased our understanding of SL and identified antecedent factors that appear to reduce or exacerbate its effect. Subsequent organizational models have beenconceived and evolved, starting with organizational citizenship behavior (OCB), which led toward contextualperformance (CP), and recently to contextual and citizenship performance (CCP). Each type of model can provide valuable insight explaining employee behavior and under which contexts SL occurs. Research shows that OCB has improves organizational productivity and competitiveness, due to organizational …

Oak Regeneration In An Eastern Pennsylvania Forest: Is Prescribed Fire Needed?, Samanatha M. Ebert

The Compass

Fire has shaped the American landscape as much as any other natural or anthropogenic disturbance such as flooding, glaciers, and tornadoes, or logging. Native Americans used fire for thousand of years to facilitate farming, travel, and hunting. Since the 1930s, the United States Forest Service has instituted and maintained a policy of firesuppression. This has changed the composition of American forests allowing shade- tolerant later successional species to thrive, but fire-adapted species are declining. This study establishes a baseline of tree composition of State Game Lands 210 in Dauphin County in Eastern Pennsylvania forest in preparation for the proposed controlled …

Drinking And Game Day: The Expansion And Solution To Alcohol Abuse In Collegiate Sporting Events, Karan Arul

The Compass

For the typical American sports fans, a night out to watch a college sporting event involves a celebration of athleticism, spirit, and teamwork. However, as of the 21st century, the act of purchasing and consuming alcohol has become increasingly complimentary to “enjoying the game” in a collegiate sports stadium. In the United States, the National Collegiate Athletic Association (NCAA) is the frontrunner in proliferating collegiate athletics. Yet, the NCAA and its over 1200 member schools “enjoy great profitability from selling and advertising alcohol.”1 As college sporting events continue to rival their professional counterparts in popularity and allegiance, attending a college …

The Compass, Issue 2 - Forward By Provost Nodine, Arcadia University Honors Program

The Compass

Forward by Dr. Barbara Nodine, Provost and Vice President of Academic Affairs, for Issue 2 of The Compass, a scholarly journal edited and produced by students in the Arcadia University Honors Program.

The Compass, Issue 2, Arcadia University Honors Program

The Compass

Issue 2 of The Compass, a scholarly journal edited and produced by students in the Arcadia University Honors Program.

13c Nmr Spectroscopy: Transmission Effects In 3,5-Diaryl-4-Bromoisoxazoles, Beatrice Edjah, Jiyao Yu, Joseph Akinoso, Julia Dave, Hector Argueta-Gonzalez, Patrick Gaulden

Georgia State Undergraduate Research Conference

No abstract provided.

Marine Transgression And Vegetation Environments In St. Catherines Island, Georgia, Rachel Luu

Georgia State Undergraduate Research Conference

No abstract provided.

Insights Into The Adsorption Thermodynamics Of Arsenates On Boehmite, Nicholas Allen, Christopher V. Tran

Georgia State Undergraduate Research Conference

No abstract provided.

Quantitative And Qualitative Stability Analysis Of Polyrhythmic Circuits, Drake Knapper

Georgia State Undergraduate Research Conference

No abstract provided.

Longitudinal Profile And Sediment Mobility As Geomorphic Tools To Interpret The History Of A Fluviokarst Stream System, John Woodside, Eric Wade Peterson, Toby Dogwiler

International Journal of Speleology

The complex drainage systems within karst settings can result in atypical longitudinal profiles. Features, such as cave entrances, can be expressed as anomalous ‘bumps’ in the longitudinal profile of a stream if downcutting has continued upstream of the area in which the water is pirated to the subsurface. Horn Hollow, a fluviokarst valley located in Carter Caves State Park Resort in northeastern Kentucky, was examined for these types of features. The objectives of this study were to determine if sediment mobility can be used as a proxy for anomalous areas along the profile of the valley and if detailed cross-sections …

Skill Assessment Of Multiple Hydrodynamic-Dissolved Oxygen Models In Chesapeake Bay, I. Irby, M. A.M. Friedrichs, C. T. Friedrichs

Presentations

No abstract provided.

U.S. Drought Monitor, April 14, 2015, Michael J. Brewer

United States Agricultural Commodities in Drought Archive

Drought map of U.S. for April 14, 2015 (4/14/15) plus: U.S. crop areas experiencing drought (map), Approximate percentage of crop located in drought, by state (bar graph), Percent of crop area located in drought, past 52 weeks (line graph) for: Corn, Soybeans, Hay, Cattle, Winter wheat.

Twentieth Century Dust Lows And The Weakening Of The Westerly Winds Over The Tibetan Plateau, Bjorn Grigholm, P. A. Mayewski, S. Kang, Y. Zhang, U. Morgenstern, M. Schwikowski, Susan D. Kaspari, V. Aizen, E. Aizen, N. Takeuchi, K. A. Maasch, S. Birkel, M. Handley, S. Sneed

All Faculty Scholarship for the College of the Sciences

Understanding past atmospheric dust variability is necessary to put modern atmospheric dust into historical context and assess the impacts of dust on the climate. In Asia, meteorological data of atmospheric dust is temporally limited, beginning only in the 1950s. High‐resolution ice cores provide the ideal archive for reconstructing preinstrumental atmospheric dust concentrations. Using a ~500 year (1477–1982 A.D.) annually resolved calcium (Ca) dust proxy from a Tibetan Plateau (TP) ice core, we demonstrate the lowest atmospheric dust concentrations in the past ~500 years during the latter twentieth century. Declines in late nineteenth to twentieth century Ca concentrations significantly correspond with …