Physical Sciences and Mathematics Commons^™

Environmental Monitoring Using A Drone-Enabled Wireless Sensor Network, Gina Valentino, Laura Yates, Brooke Potter

Senior Honors Projects, 2010-2019

Water quality monitoring traditionally occurs via resource intensive field surveys, such as when a researcher manually collects data in a stream. Limiting factors such as time, money, and accessibility often result in less oversight of impaired water bodies, significantly threatening ecosystemic health and related ecosystem services. According to the United States Environmental Protection Agency, 84% of rivers and streams within the United States remain unassessed, resulting in significant lapses in available data. Such lapses prohibit efficient and effective monitoring, restoration, and conservation efforts throughout the United States. The objective of this project was to employ an unmanned aerial vehicle to …

Decrypting Female Attractivity In Garter Snakes, Holly Rucker

Senior Honors Projects, 2010-2019

Pheromones are utilized by many species as sexual signals driving mate choice, and pheromone production in vertebrates hinges on sex hormone action. Female red-sided garter snakes (Thamnophis sirtalis parietalis) produce a skin-based sex pheromone used by males for mate detection and selection. Estradiol is necessary for pheromone production, yet the specific mechanisms within the skin are unknown. Central to this is the metabolism of testosterone to estradiol via the enzyme aromatase. It is hypothesized that female garter snakes synthesize estradiol locally in the skin and maintain pheromone production via tissue-specific regulation of aromatase. Further, I hypothesize that female …

Lead Contamination Of Soils In An Abandoned Rifle Range, Augusta County, Virginia, Logan Mahoney

Senior Honors Projects, 2010-2019

Presence of high concentrations of Lead within the soil and water could lead to various health related impacts on humans and wildlife. Exposure to Lead short termly or long termly could lead to many detrimental impacts due to Lead poisoning. The overall concentration of Lead in a soil can be measured using an Inductively Coupled Plasma Mass Spectrometry (ICPMS) under laboratory conditions. The present study investigates the Lead concentration of contaminated abandoned riffle range located in Augusta County, Virginia. Soil samples were obtained using soil augurs from three locations randomly based on the severity of contamination. Location three, which was …

Modeling A Chaotic Billiard: The Bunimovich Stadium, Randal Shoemaker

Senior Honors Projects, 2010-2019

The Bunimovich stadium is a chaotic dynamical system in which a single particle, known as a billiard, moves indefinitely within a barrier without loss of momentum. Mathematicians and physicists have been interested in its properties since it was discovered to be chaotic in the 1970’s [5] [3] [4]. The Bunimovich stadium is actively researched [9]. This thesis and its accompanying software, the Bunimovich Stadia Evolution Viewer (BSEV), present a novel visual representation of the the chaotic dynamical system. The goal for the software is to provide insights into the stadium’s properties to aid researchers. This tool allows one to visualize …

Multi-Proxy Characterization Of Acex Subunit 1/5 (The “Zebra” Interval) To Better Understand Sediment Deposition At This Critical Age Boundary And Paleoceanographic Transition, Victoria Hojnacki

Senior Honors Projects, 2010-2019

Sediment cores recovered from the Lomonosov Ridge on IODP Expedition 302, the Arctic Coring Expedition (ACEX), provided the first major insights into long-term Cenozoic history of climate and ocean conditions in the central Arctic. However, the ACEX record is hampered by a major hiatus or severely condensed interval (depending on age-model interpretations) at 198.7 mcd separating the middle Eocene and Miocene records. Lithologic subunit 1/5 lies above this depth horizon, and is informally called the “zebra interval” because of distinctive stripes - black and gray tilted and cross-banded silty-clay layers, up to 3 cm thick that characterize the lower ~2.5 …

Grain Size And Vegetation As Controlling Variables Of Stream Channel Morphology, Grant Colip

Senior Honors Projects, 2010-2019

Streams are one of the major driving forces that shape the landscapes in the Shenandoah Valley of Virginia and the eastern United States as a whole, and they serve an important role in transporting both water and sediment to the Atlantic Ocean. However, streams are often modified for human use, thus altering their natural equilibrium. These alterations have frequently led to the degradation of channel stability as well as damage to property and infrastructure. A better understanding of how both grain size (D₅₀) and vegetation impact stream sinuosity (S) is needed to analyze the prevalence of channel degradation …

The Effects Of Finite Precision On The Simulation Of The Double Pendulum, Rebecca Wild

Senior Honors Projects, 2010-2019

We use mathematics to study physical problems because abstracting the information allows us to better analyze what could happen given any range and combination of parameters. The problem is that for complicated systems mathematical analysis becomes extremely cumbersome. The only effective and reasonable way to study the behavior of such systems is to simulate the event on a computer. However, the fact that the set of floating-point numbers is finite and the fact that they are unevenly distributed over the real number line raises a number of concerns when trying to simulate systems with chaotic behavior. In this research we …

Are Firm Emissions Data Likely To Be Accurate Under Carbon-Dioxide Cap & Trade Programs? An Economic Analysis, Kyle Beck

Senior Honors Projects, 2010-2019

Numerous policy makers around the world have implemented carbon dioxide (CO2) cap and trade programs in an effort to combat global climate change. However, under this policy option emitters face incentives to both overstate prior emission levels and then exaggerate emissions reductions induced by regulation. I first build a simple conceptual model which demonstrates these incentives for fraud, and then outline institutional conditions which could plausibly enhance, or else reduce, firm incentives to disseminate erroneous emissions data under this policy option. Next I analyze real world evidence suggesting that duplicitous emissions data, particularly for the pre-regulatory period, is a serious …

The Reproducibility Crisis In Scientific Research, Sarah Eline

Senior Honors Projects, 2010-2019

Following the push for evidence based practice, came a huge proliferation of research journals and journal articles. With this increase in quantity came an increased concern about the quality of these articles being published, which led to a multifield investigation regarding the reproducibility of scientific research. With studies in the fields of psychology and biomedicine only reaching approximately a 30% reproducibility rate, a conversation has been sparked that spans across every field of research. Upon further investigation, various causes for this reproducibility crisis have surfaced which include, lack of data sharing/ transparency, statistical errors, funding corruption, and the culture surrounding …

A Study Of The Effect Of Memory System Configuration On The Power Consumption Of An Fpga Processor, Adam Blalock

Senior Honors Projects, 2010-2019

With electrical energy being a finite resource, feasible methods of reducing system power consumption continue to be of great importance within the field of computing, especially as computers proliferate. A victim cache is a small fully associative cache that “captures” lines evicted from L1 cache memory, thereby reducing lower memory accesses and compensating for conflict misses. Little experimentation has been done to evaluate its effect on system power behavior and consumption. This project investigates the performance and power consumption of three different processor memory designs for a sample program using a field programmable gate array (FPGA) and the Vivado Integrated …

Combining Chicken Retina Rna-Seq Data Across Studies To Strengthen Biomarker Detection, Sarah Szvetecz

Senior Honors Projects, 2010-2019

Various studies have identified the chicken embryo (Gallus gallus) as a useful model to study the retinogenesis process in humans. This project uses data from two specific RNA sequencing (RNA-seq) studies to investigate retina developmental biology. These studies are done in two different labs using different protocols, as such they cannot be compared directly. Study 1 contains chicken retina samples from embryonic day 3, 5 and 8; while study 2 has retina samples from embryonic day 8, 16, and 18 of developmental age. We apply a normalization method on both studies to account for differences in the two …

Using Data Science To Detect Fake News, Eliza Shoemaker

Senior Honors Projects, 2010-2019

The purpose of this thesis is to assist in automating the detection of Fake News by identifying which features are more useful for different classifiers. The effectiveness of different extracted features for Fake News detection are going to be examined. When classifying text with machine learning algorithms features have to be extracted from the articles for the classifiers to be trained on. In this thesis, several different features are extracted: word counts, ngram counts, term frequency-inverse document frequency, sentiment analysis, lemmatization, and named entity recognition to train the classifiers. Two classifiers are used, a Random Forest classifier and a Naïve …

Obscurin Is A Semi-Flexible Molecule In Solution, Jacob Whitley

Senior Honors Projects, 2010-2019

Obscurin, a giant modular cytoskeletal protein, is comprised mostly of tandem immunoglobulin-like (Ig-like) domains. This architecture allows obscurin to connect distal targets within the cell. The linkers connecting the Ig domains are usually short (3-4 residues). The physical effect arising from these short linkers is not known; such linkers may lead to a stiff elongated molecule or, conversely, may lead to a more compact and dynamic structure. In an effort to better understand how linkers affect obscurin flexibility, and to better understand the physical underpinnings of this flexibility, here we study the structure and dynamics of four representative sets of …

A Snowball's Chance: Debt Snowball Vs. Debt Avalanche, Evan Mcallister

Senior Honors Projects, 2010-2019

Traditional mathematical analysis states that the most efficient way to pay off interest-bearing consumer debt is to pay the individual debts in order from largest to smallest interest rate. In doing this, the debtor will eliminate the largest sources of interest first, thus shortening the overall time-to-pay. This method is known as the “Debt Avalanche.” The “Debt Snowball” method, popularized in large part by investor-author David Ramsey, recommends that consumers pay debts in order from smallest to largest, regardless of interest rate. In this paper, I conduct an empirical analysis of the Federal Reserve’s Survey of Consumer Finance (SCF), calculating …

The Evolution Of Computational Propaganda: Trends, Threats, And Implications Now And In The Future, Holly Schnader

Senior Honors Projects, 2010-2019

Computational propaganda involves the use of selected narratives, social networks, and complex algorithms in order to develop and conduct influence operations (Woolley and Howard, 2017). In recent years the use of computational propaganda as an arm of cyberwarfare has increased in frequency. I aim to explore this topic to further understand the underlying forces behind the implementation of this tactic and then conduct a futures analysis to best determine how this topic will change over time. Additionally, I hope to gain insights on the implications of the current and potential future trends that computational propaganda has.

My preliminary assessment shows …

The Preparation Of Palladium Complexes Of N-Pyrazolylpropanamide Derivatives, Tyler Palombo 5275714

Senior Honors Projects, 2010-2019

The reaction of 3,5-dimethylpyrazolyl-N-isopropylpropanamide (L1) with dichloro(1,5-cyclooctadiene)palladium(II) displaces cyclooctadiene forming Cl₂Pd(L1)₂. This complex has been characterized by NMR and IR spectroscopy, single crystal X-Ray diffraction, and elemental analysis. It is composed of a square planar Pd with trans L1 ligands attached through a pyrazolyl nitrogen and intramolecular hydrogen bonding between the amide and chloride. Similar reactions were carried out with 3,5-dimethylpyrazolylpropanamide (L2), pyrazolyl-N-isopropylpropanamide (L3), 3-(1H-benzotriazol-1-yl)-N,N-dimethylpropanamide (L4), 3-methylpyrazolylpropanamide (L5), 3-(1H-benzotriazol-1-yl)-2-methylpropanamide (L6), and N-pyrazolypropanamide (L7) presumably forming analogous complexes. This formulation for …

Less-Java, More Learning: Language Design For Introductory Programming, Zamua Nasrawt

Senior Honors Projects, 2010-2019

Less-Java is a new procedural programming language with static, strong, and inferred typing, native unit testing, and support for basic object-oriented constructs. These features make programming in Less-Java more intuitive than traditional introductory languages, which will allow professors to dedicate more class time to overarching computer science concepts and less to syntax and language-specific quirks.

Climate Communication Through A Community Perspective, Kathryn Mcgee

Senior Honors Projects, 2010-2019

This project utilized psychology and science communication strategies to develop creative, locally framed climate change messaging. Through an online survey of 300 Gloucester County, VA residents, community themes of place attachment, environmental connection, risk assessment and climate change acceptance were recorded. Using the results from the survey I created a website, https://guidinggloucester.wixsite.com/home, which serves as an avenue for communicating with Gloucester residents. The website displays the results of the survey, explains climate change information that is relevant to Gloucester County, and gives examples of local actions to help increase engagement in climate solutions. In addition to the website, I …

Sustainable Agriculture: Integration Of Aquaponics At Punta Leona Hotel And Club In Costa Rica, Cailin Sierra Dyer, Paris Riley Smith

Senior Honors Projects, 2010-2019

Sustainable agriculture is becoming an increasingly important method of food production. As human populations continue to grow, attendant food demand has been increasingly met via agribusiness, including monoculture crop production and factory farming. As is well documented, the rise of agribusiness has led to resource degradation and declining stocks on which “sustainable agriculture” relies. This paper describes a local attempt to re-establish “sustainable agriculture” through the development of an aquaculture system that mimics a naturally occurring cycle that integrates fish and plants. The system was constructed over a three-week period in Punta Leona, Costa Rica. First, the ground was cleared …

Using Foraminifera In Stemseas Site 1 To Understand The Recent Paleoceanographic And Paleoclimatic History Of Tanner Basin, California Borderland, Michael Stanley Stone

Senior Honors Projects, 2010-2019

In May of 2016, the STEMSEAS Educational Transit cruise OC1605-tranA collected the STEMSEAS Site 1 core from the Tanner Basin in the California Borderland. This research serves as the first formal survey of the foraminifera preserved within that core. The purpose of this research is to use foraminifera preserved within that core to understand the recent depositional and paleoenvironmental conditions at Site 1, and to place that information into a regional paleoceanographic and paleoclimatic context. In pursuing this purpose, this research aims to answer three questions: 1) Can biostratigraphic markers in the foraminiferal assemblages in STEMSEAS Site 1 core be …

A Comparison Of Riparian Characteristics And Resulting Water Quality In Restored Agricultural Systems, Amanda Y. Crandall

Senior Honors Projects, 2010-2019

Agronomic land use and urbanization are the leading causes of water quality decline within streams of the Shenandoah Valley. Implementation of riparian buffer zones is a common, beneficial approach to initiate restoration of negatively affected waterways. In the Commonwealth of Virginia, the Conservation Reserve Enhancement Program (CREP) assists landowners in repairing natural habitat through the provision of cattle fencing and reintroduction of hardwood trees, native warm season grasses, and shrubs. We analyzed seven CREP restored sites of varying time since restoration (5-15 years) to determine the effects of time, land use, and riparian zone characteristics on water quality. The Virginia …

Enhancing The Learning Experience- Use Of Video Game Technology For Teaching Japanese Language, Craig A. Decampli

Senior Honors Projects, 2010-2019

The Japanese language is challenging to learn, especially for native speakers of Indo- European languages. The three components of written Japanese -- Hiragana, Katakana, and Kanji – include 2,136 Kanji characters, and 46 each for Katakana and Hiragana. Teaching Japanese – generally through repetition – can lead to student boredom and affect success. Research shows that video games can at least provide a more enjoyable learning experience. Despite this fact, there are a lack of video games for teaching Japanese characters. Using the Unity game engine and the C# programming language, a video game for enhancing the learning of students …

Analysis Of Structural Stability Of Human Prosecretory Mitogenic Lacritin By Circular Dichroism, Anna P. Desmarais, Casey Q. Ramirez Cortes

Senior Honors Projects, 2010-2019

Purpose: Lacritin is a human tear glycoprotein that has high thermal stability. When cleaved, lacritin has antimicrobial activity resulting from the C-terminus amphipathic alpha helical region. The alpha helices contain three salt bridges; ionic bonds between neighboring oppositely charged amino acids. The purpose of this research was to investigate the hypothesis that the salt bridges within the alpha helices contribute to the high thermal stability.

Methods: To determine the role of salt bridges in the thermal stability of lacritin, point mutants were prepared for each salt bridge by site directed mutagenesis that replaced the oppositely charged amino acids with serine. …

Increasing Public Skepticism In The Face Of Imminent Dangers From Climate Change: A Call For Science To Repair Rifts Between Society And Academia, Matthew W. Morrissey, Joshua Schmidt

Senior Honors Projects, 2010-2019

This project is a composition of a literature review, our learning process, and an attached experimental project. The project as a whole sought to understood how and why policies/corporations resist environmentally sustainable practices/laws and makes suggestions for how to convince people to change their behaviors and utilize their power as consumers. Overall, our goal was to investigate and understand the relationship between science and the public by composing a literature review of environmental science, sociology, and psychology papers, and then compose a presentation that would communicate the threat of climate change. The interdisciplinary nature of climate change made this research …

An Affordable Vr Environment, Matthew R. Petty

Senior Honors Projects, 2010-2019

Virtual Reality is a powerful technology with the ability to affect our senses in powerful ways. Traditionally used for entertainment, we argue that it can be used for educational purposes as well. In order to get virtual reality into the classroom, we must address its cost and portability, as well as improve the interaction that users experience with the virtual environment. Our solution, a Unity program installed on an iPhone and a Mac, attempts to solve these issues. A technical demo was created that functions and can be interfaced with. While this solution is a proof of concept, its consequences …

Feasibility Study: Tangier Island Wind Turbine Deployment, Patrick Landess

Senior Honors Projects, 2010-2019

The 2014 Virginia Energy Plan set the goal of 25% of the energy produced in the state to be derived from renewable resources by 2025. Wind energy is one of the most prominent renewable resources in the state, with a potential wind capacity of approximately 1800 MW. The Virginia Department of Mines Minerals and Energy (DMME) looks to incentivize both small-scale and commercial renewable energy projects. As a result of this policy initiative and the competitiveness of renewable energy, the Center for Wind Energy (CWE) at James Madison University established the Distributed Wind Assistance Program (DWAP).

This honors project serves …

Characterizing Subsurface Void Spaces And Water Distribution And Flow Patterns In Cave Hill Karst Using Resistivity, Jacob A. Gochenour

Senior Honors Projects, 2010-2019

Describing the distribution of groundwater is essential in understanding the evolution of geomorphologic features in karst topography. Electrical resistivity allows us to find a model of subsurface distribution of resistivity that enables the visual recognition of groundwater and void spaces. The purpose of this research is to implement electrical resistivity to describe the spatial relationship of groundwater and karstic features at Grand Caverns National Natural Landmark, Grottoes, Virginia. Two locations of interest, a karstic swale and sinkhole area, were identified for the deployment of electrical resistivity. Both, dipole-dipole and Schlumberger arrays were collected for each deployment. A total of ten …

Mid-Ir Properties Of H2o Megamaser Disks, Catherine Witherspoon

Senior Honors Projects, 2010-2019

Astrophysical masers are natural microwave amplifiers by stimulated emission and when detected in galaxy centers, they are extremely luminous (i.e. millions of times more luminous than those associated with typical star-forming regions in the spiral arms of our own Milky Way). A fraction of water megamasers detected in 22 GHz emission in galactic nuclear regions are in a disk-like configuration, which makes them extremely valuable for providing direct geometrical distances to galaxies and the most precise and accurate masses of supermassive black holes. Nevertheless, these systems are extremely rare. While the exact mechanism of water maser emission production is not …

Real Time Monitoring Of Photocatalysis: An Application And Expansion Of The Quartz Crystal Microbalance, Perrin Godbold

Senior Honors Projects, 2010-2019

There are many applications of photocatalytic chemistry, with hundreds of researchers investigating photocatalytic materials. Another method of investigation could aid these researchers and contribute significantly to this field. This study attempts to develop a new method of analysis by expanding the capabilities of the Quartz Crystal Microbalance (QCM) into the realm of photocatalysis. We coated QCM crystals with the stable and well-known photocatalyst, titanium dioxide, and utilized these coated crystals to begin to develop an analysis procedure for our modified instrument. Some indication of the QCM’s sensitivity was seen, but the UV irradiation elicited a frequency change independent of the …

Software Development For Home Energy Audits: Reducing Energy Consumption In Harrisonburg Through Technology, Brantley E. Gilbert

Senior Honors Projects, 2010-2019

Fossil fuels play a vital role in our daily lives. Oil, natural gas, and coal powers our cars, heats our homes and water, and are used by power companies to generate the massive amounts of electricity used every day by the United States. However, this reliance on a finite source of energy is not sustainable. Fossil fuels such as these are non-renewable resources whose production will eventually be unable to keep up with the rate of consumption. Furthermore, the extraction of the stored energy in these fuels through combustion releases harmful substances into the environment, including toxins and greenhouse gases …