Physical Sciences and Mathematics Commons^™

Computational Design Of Two-Dimensional Transition Metal Dichalcogenide Alloys And Their Applications, John Douglas Cavin

Arts & Sciences Electronic Theses and Dissertations

The discovery of bronze as an alloy of copper and tin is arguably the earliest form of material design, dating back thousands of years. In contrast, two-dimensional materials are new to the 21st century. The research presented in this dissertation is at the intersection of alloying and two-dimensional materials. I specifically study a class of two-dimensional materials known as transition metal dichalcogenides (TMDCs). Because of the large number of transition metals, there are many combinations of TMDCs that can be alloyed, making experimental exploration of the phase space of possible alloys unwieldly. Instead, I have applied first-principles methods to study …

Deep Learning Deleterious Small Molecule Biochemistry From The Lab To The Clinic, Matthew Matlock

Arts & Sciences Electronic Theses and Dissertations

Small molecules are key tools in biology and medicine. In biology, small molecules are used to probe biological systems and gain insight into their structure and function. In medicine, this role is further refined to reverse the biological conditions that contribute to human disease. Developing new small molecules into biological probes or drugs can be a daunting scientific task. These projects often begin with many thousands of potential candidates, which are progressively screened and eliminated from consideration by high-throughput experimental assays. Those molecules that emerge from this process as candidate drugs are also subject to extensive in vitro, in vivo, …

The Phylogeography Of Rare Central Tennessee Glade Endemics Trifolium Calcaricum And Viola Egglestonii, Rachel Ann Lyman

Arts & Sciences Electronic Theses and Dissertations

Endemic species are range-restricted to a particular type of habitat and generally occur in a few small populations. Often endemic species are threatened or endangered due to their geographic isolation and limited habitat breadth. Despite the fact that understanding factors that may have shaped the evolutionary history of a species with a narrow distribution can provide important insights for their management and conservation, little is known about the historical forces that gave rise to many endemic species. Endemic species can arise because of factors such as variation in climate, geographic barriers, and habitat specificity, or the combination of several of …

Landscape Evolution At Endeavour And Gale Craters On Mars, And How Terrain Characteristics Correlate With Mineralogy On Lower Mount Sharp, Gale Crater, Madison Nicole Hughes

Arts & Sciences Electronic Theses and Dissertations

The geomorphic expression of terrain provides information such as the underlying lithologic properties and the dominant surface processes. By examining the surface morphology of two impact craters on Mars that have been explored by rovers, we can synergistically combine orbital and ground observations to obtain a deeper insight into the geologic history. In this dissertation, we analyze the landscape evolution of Endeavour and Gale craters, which have been explored by the Opportunity and Curiosity rovers, respectively. This is accomplished largely by analyzing the topography on a larger scale using images from Mars orbiters and their associated Digital Elevation Models, combined …

Interpolating Matrices, Alberto Dayan

Arts & Sciences Electronic Theses and Dissertations

This Thesis work aims to extend the notion of interpolating sequences to objects having a non-trivial algebraic structure, such as a sequence of square matrices A (of eventually unbounded dimensions). First, we will consider the case in which the spectra of A lie in the unit disc, a necessary assumption if we want to apply to each matrix of the sequence a bounded holomorphic function on the unit disc. Since analytic functions preserve algebraic properties of square matrices, such as their eigenspaces, we can't extend the definition of interpolating sequences to matrices by just considering targets which are bounded in …

Spectral Ground Motion Characteristics Of Induced Earthquakes In The Fort Worth Basin, Texas, Seongju Jeong

Earth Sciences Theses and Dissertations

Concurrent with the development of unconventional oil and gas production, seismicity in the central United States has dramatically increased. Previous studies in many locations suggest that the earthquakes reactivate pre-existing faults, as a result of changing subsurface stresses due to injection of fluids from wastewater disposal wells. This sudden rise in seismicity rate motivates an assessment and possible mitigation of seismic hazard due to the proximity of induced seismicity to metropolitan areas like the Dallas-Fort Worth, Texas.

Successful assessment and mitigation of earthquake hazards requires estimates of ground motion parameters representing path attenuation, site effects and source characteristics constrained by …

High-Order Flexible Multirate Integrators For Multiphysics Applications, Rujeko Chinomona

Mathematics Theses and Dissertations

Traditionally, time integration methods within multiphysics simulations have been chosen to cater to the most restrictive dynamics, sometimes at a great computational cost. Multirate integrators accurately and efficiently solve systems of ordinary differential equations that exhibit different time scales using two or more time steps. In this thesis, we explore three classes of time integrators that can be classified as one-step multi-stage multirate methods for which the slow dynamics are evolved using a traditional one step scheme and the fast dynamics are solved through a sequence of modified initial value problems. Practically, the fast dynamics are subcycled using a small …

Using Machine Learning Methods To Predict The Movement Trajectories Of The Louisiana Black Bear, Daniel Clark, David Shaw, Armando Vela, Shane Weinstock, John Santerre, Joseph D. Clark

SMU Data Science Review

In 1992, the Louisiana black bear (Ursus americanus luteolus) was placed on the U.S. Endangered Species List. This was due to bear populations in Louisiana being small and isolated enough where their populations couldn’t intersect with other populations to grow. Interchange of individuals between subpopulations of bears in Louisiana is critical to maintain genetic diversity and avoid inbreeding effects. Utilizing GPS (Global Positioning System) data gathered from 31 radio-collared bears from 2010 through 2012, this research will investigate how bears traverse the landscape, which has implications for gene exchange. This paper will leverage machine learning tools to improve upon existing …

Analyzing Empirical Quality Metrics Of Deep Learning Models For Antimicrobial Resistance, Huy H. Nguyen, Sanjay Pillay, Allison Roderick, Hao Wang, John Santerre

SMU Data Science Review

Antimicrobial Resistance (AMR) is a growing concern in the medical field. Over-prescription of antibiotics as well as bacterial mutations have caused some once lifesaving drugs to become ineffective against bacteria. However, the problem of AMR might be addressed using Machine Learning (ML) thanks to increased availability of genomic data and large computing resources. The Pathosystems Resource Integration Center (PATRIC) has genomic data of various bacterial genera with sample isolates that are either resistant or susceptible to certain antibiotics. Past research has used this database to use ML algorithms to model AMR with successful results, including accuracies over 80%. To better …

Linking Human Activities To Water Quality In Coastal New England: Past And Present, Amelia Hurst

University Scholar Projects

This project examines the timing and effect of direct and indirect anthropogenic and natural influences on the marine environment in embayments in southern New England over the past decades to century timescale. We investigated the effects of human land use from colonial through post-industrial times, determined baseline conditions and natural climatic variability, and analyzed the response of marine ecosystems to specific local management actions aimed to improve water quality. A coastal sediment core was taken in Mumford Cove, CT and was analyzed downcore for eutrophication markers (C: N, %C, %N, d¹⁵N, d¹³C) and metals (Hg, Pb, …

Bayesian Methods In Operational Testing: Enhancing Testing Through Combining Information, Victoria R C Sieck

Mathematics & Statistics ETDs

When developing a system, considering system performance from a user perspective can be done through operational testing|assessing the ability of representative users to accomplish tasks with the system in operationally representative environments. This critical process can be expensive and time-consuming. We show how to leverage an existing design of experiments (DOE) process to construct a Bayesian adaptive design. This method allows for interim analyses using predictive probabilities to stop testing early for success or futility. Furthermore, operational environments are directly used in product evaluation. Representative simulations demonstrate reductions in necessary test events. Next, priors are built using developmental testing data. …

Effects Of Environmental Change On Ancestral Pueblo Fishing In The Middle Rio Grande, Jonathan W. Dombrosky Dr.

Anthropology ETDs

It has long been assumed that fishes were unimportant in the diet of past Pueblo people in the U.S. Southwest. Yet, small numbers of fish remains are consistently recovered from Late pre-Hispanic/Early Historic archaeological sites in the Middle Rio Grande of New Mexico. The end of drought conditions may have impacted food choice and fishing decisions during this time. I use behavioral ecology to understand how fishing could have been an optimal food-getting strategy for Ancestral Pueblo farmers. Stable isotope analysis offers a way to account for environmental change. I provide a refined ¹³C Suess correction model to support …

Ultrahigh Resolution Ote-Ms Data For Wildfire-Influenced Tar Ball Aerosol From The Pacific Northwest, Matthew Brege, Simeon Schum, Lynn Mazzoleni

Michigan Tech Research Data

This dataset and the methods used to obtain it are described in Chapter 4 of "EXTREME MOLECULAR DIVERSITY IN BIOMASS BURNING ATMOSPHERIC ORGANIC AEROSOL OBSERVED THROUGH ULTRAHIGH RESOLUTION MASS SPECTROMETRY" a Dissertation prepared by Matthew Brege and submitted as a Doctoral Thesis. Access this associated work here: https://doi.org/10.37099/mtu.dc.etdr/927

Briefly, two samples of ambient aerosol were collected in the Pacific Northwest of the United States in 2017 which were heavily influenced by atmospheric tar balls. The acetonitrile soluble extracts of the aerosol filters were analyzed using ultrahigh resolution Orbitrap mass spectrometry (OTE-MS) using positive and negative modes of electrospray ionization as …

Synthesis And Crystal Structures Of 3,6-Di­Hy­Droxy­Picolinic Acid And Its Labile Inter­Mediate Dipotassium 3-Hy­Dr­Oxy-6-(Sulfonato­­Oxy)Pyridine-2-Carboxyl­Ate Monohydrate, Edward J. Behrman, Sean R. Parkin

Chemistry Faculty Publications

A simplified two-step synthesis of 3,6-di­hydroxy­picolinic acid (3-hy­droxy-6-oxo-1,6-di­hydro­pyridine-2-carb­oxy­lic acid), C₆H₅NO₄ (II), an inter­mediate in the metabolism of picolinic acid, is described. The crystal structure of II, along with that of a labile inter­mediate, dipotassium 3-hy­droxy-6-(sulfonato­oxy)pyridine-2-carboxyl­ate monohydrate, 2K⁺·C₆H₃NO₇S²⁻·H₂O (I), is also described. Compound I comprises a pyridine ring with carboxyl­ate, hydroxyl (connected by an intra­molecular O—H⋯O hydrogen bond), and sulfate groups at the 2-, 3-, and 6-positions, respectively, along with two potassium cations for charge balance and one water …

Late Amazonian Wind Regimes And Landscape Evolution In Northern Meridiani Planum, Mars, Thomas Stritch

Geology: Student Scholarship & Creative Works

Aeolian process have dominated the lower latitudes of Mars for billions of years. Aeolian landforms can act as records of current and past climates and landscape evolution processes. The etched deposits of Meridiani Planum, a vast suite of layered bedrock extending from southwest Arabia Terra to Schiaparelli crater, have long been noted to have been eroded by aeolian processes. However, little detailed work on the aeolian landforms of Meridiani Planum beyond the Opportunity rover landing site has been done. In this study, I examine wind streaks, aeolian bedforms (including dunes and large ripples), and yardangs in a valley about 370 …

A Highly Predictive Microrna Panel For Determining Delayed Cerebral Vasospasm Risk Following Aneurysmal Subarachnoid Hemorrhage, Wang-Xia Wang, Joe E. Springer, Kevin Xie, David W. Fardo, Kevin W. Hatton

Sanders-Brown Center on Aging Faculty Publications

Approximately one-third of aneurysmal subarachnoid hemorrhage (aSAH) patients develop delayed cerebral vasospasm (DCV) 3–10 days after aneurysm rupture resulting in additional, permanent neurologic disability. Currently, no validated biomarker is available to determine the risk of DCV in aSAH patients. MicroRNAs (miRNAs) have been implicated in virtually all human diseases, including aSAH, and are found in extracellular biofluids including plasma and cerebrospinal fluid (CSF). We used a custom designed TaqMan Low Density Array miRNA panel to examine the levels of 47 selected brain and vasculature injury related miRNAs in CSF and plasma specimens collected from 31 patients with or without DCV …

Investigations Of Geochemical Variations With Depth At The First 15 Drill Sites On Mars Analyzed By The Chemcam Instrument Onboard The Curiosity Rover And Supported By Laboratory Studies And Analog Research At The Valle Grande Paleolake, Valles Caldera, New Mexico, Usa, Ryan S. Jackson

Earth and Planetary Sciences ETDs

The ChemCam instrument collected a wealth of data during the first 15 drill campaigns and on the distribution of trace elements at Yellowknife Bay, Mars. The drill sites investigation showed that most sites were geochemically homogenous down the depth of the drill hole. Two sites in the Stimson formation contained a vertical gradient of decreasing silica down > 3 cm. This gradient may be the result of groundwater flow and is likely recent, within 2.3 Ma. The trace element research was grounded with an analog study at the Valle Grande paleolake in New Mexico. We observed progressive alteration in the minerology …

Developing An Inquiry-Based Laboratory Project For Chem 142l Course At Bsu, Manuel Pina

Honors Program Theses and Projects

In addition to content knowledge, critical and independent thinking, scientific reasoning, and problem-solving skills are essential in preparing next generation of successful workforce. Since one of the biggest advantages of STEM disciplines is a “must-have” hands-on laboratory experience, it is intuitive to exploit this learning space to reinforce afore-mentioned skills. In this context, project-based (PBL) or inquiry-based (IBL) laboratory experiences are rapidly becoming mainstream pedagogical choice for many STEM instructors across United States.^[1-4] PBL, and IBL are learning experiences that offer students an opportunity to experience realistic scientific process of discovery through carefully designed inquiry-driven and/or open-ended investigative laboratory …

Realization Of Bsu First Magneto-Optical Trap For The Spatial Confinement Of Rb Atoms Using Next Generation Fiber Optic Capabilities With Minimot, Brahmin Thurber-Carbone

Honors Program Theses and Projects

This paper will be a combination of my theoretical and experimental work toward Bridgewater State Universities first Magneto-Optical Trap (MOT) for laser cooling and trapping of neutral atoms in order to study fundamental quantum mechanical behavior of Rubidium (Rb) atoms. The goal of the theoretical aspect is to complete details of well-established works on how the complicated quantum, atomic, and electromagnetic (laser) interactions required to understand the design and operation of the MOT reduce to the physics and mathematics of a damped oscillator. This is made explicitly clear using familiar damped oscillator systems, such as a spring/mass/damping or pendulum/mass/damping (ie …

Quantifying Feature Overlaps In Deep Neural Networks And Their Applications In Unsupervised Learning And Generative Adversarial Networks, Edward Collier

LSU Doctoral Dissertations

Deep neural network learn a wide range of features from the input data. These features take many different forms from, structural to textural, and can be very scale invariant. The complexity of these features also differs from layer to layer. Much like the human brain, this behavior in deep neural networks can also be used to cluster and separate classes. Applicability in deep neural networks is the quantitative measurement of the networks ability to differentiate between clusters in feature space. Applicability can measure the differentiation between clusters of sets of classes, single classes, or even within the same class. In …

The Changing Face Of Winter: Lessons And Questions From The Laurentian Great Lakes, Ted Ozersky, Andrew J. Bramburger, Ashley K. Elgin, Henry A. Vanderploeg, Jia Wang, Jay A. Austin, Guy Meadows, Et. Al.

Michigan Tech Publications

Among its many impacts, climate warming is leading to increasing winter air temperatures, decreasing ice cover extent, and changing winter precipitation patterns over the Laurentian Great Lakes and their watershed. Understanding and predicting the consequences of these changes is impeded by a shortage of winter-period studies on most aspects of Great Lake limnology. In this review, we summarize what is known about the Great Lakes during their 3–6 months of winter and identify key open questions about the physics, chemistry, and biology of the Laurentian Great Lakes and other large, seasonally frozen lakes. Existing studies show that winter conditions have …

1h-Cyclopropabenzene And 1h-Cyclopropa[B]Naphthalene Fumigation Suppresses Climacteric Ethylene And Respiration Rates And Modulates Fruit Quality In Long-Term Controlled Atmosphere-Stored ‘Gold Rush’ Pear Fruit, Vijay Yadav Tokala, Zora Singh, Poe Nandar Kyaw

Research outputs 2014 to 2021

‘Gold Rush’ pear (Pyrus communis L.) is a russet-coloured fruit with soft buttery textured flesh and is gaining wide popularity in Australia and other countries along with other pear cultivars. The fruit are sensitive to ethylene, and exposure even at very low concentrations significantly reduces the storage duration as well as fruit quality during storage. The efficacy of two new ethylene antagonist compounds, namely, 1H-cyclopropabenzene (BC) and 1H-cyclopropa[b]naphthalene (NC), as well as 1-methylcyclopropene (1-MCP) in regulating ethylene production, respiration rates and maintaining the fruit quality of ‘Gold Rush' pear during 150 d and 200 d of controlled atmosphere (CA) storage …

Over The Rainbow: A Study On The Impact Of Raindrop Shape On Rainbow Arches, Samantha Forshay

Undergraduate University Honors Capstones

In this capstone project, I developed a mathematical process that was inserted into computer programmed models that simulated the formation of rainbows with the guidance of professors from Gallaudet University who are well-informed in the subject. The context of my project consists of three points: the mathematical process of creating mathematical equations from a variety of mathematical and scientific sources, the manipulation of the shape of raindrops and its subsequent effect on rainbow arches by using a series of mathematical equations to help the computer program to create a hamburger-shaped raindrop model, and the analyzation of the results discovered from …

Is Gallaudet Diverse? Creating An R Package To Measure Institutional Diversity, Emelia Beldon

Undergraduate University Honors Capstones

One of the biggest trends in social science is the study of racial and ethnic diversity measures. Numerous scholarly articles and journals detail how important it is to encourage a racially and ethnically diverse community in higher education. However, the question remains: how do we accurately measure racial and ethnic diversity? Furthermore, how do we present the diversity in terms of statistics for best use? With this project, I answer these questions. I created an R software package, diversityGV, to measure institutional racial and ethnic diversity using the Generalized Variance mathematical approach. I then used diversityGV with a dataset from …

Silver Bow Creek/Butte Area Npl Site Butte Priority Soils Operable Unit, Remedial Design Documents For The Butte Reduction Works (Brw) Smelter Area, Josh Bryson

Silver Bow Creek/Butte Area Superfund Site

No abstract provided.

Re: Silver Bow Creek/Butte Area Npl Site Butte Priority Soils Operable Unit, Remedial Design Documents For The Butte Reduction Works (Brw) Smelter Area, Josh Bryson

Silver Bow Creek/Butte Area Superfund Site

Cover letter

Steady-State Transmembrane Water Exchange In Proliferating Cultures Of Saccharomyces Cerevisiae, Joseph O'Malley Armstrong

Dissertations and Theses

Cellular water exchange is often considered in terms of a change in volume, where a net flux of water moves across the cell membrane due to a change in osmotic pressure. Osmotic pressure can cause a cell to shrink or swell, however, rapid water exchange persists across the membrane even when the volume of the cell is constant. Steady-state transmembrane water exchange describes the exchange of water across the cell membranes which results in no net change in cell volume. This exchange is astonishingly rapid; the entire pool of intracellular water of a Saccharomyces cerevisiae cell may exchange 2-5 times …

Effect Of Nitrogen And Foliar Spray Of Bio‐Regulators On Seed Production Of Lasiurus Sindicus, Nagendra Singh Yadava

IGC Proceedings (1993-2023)

No abstract provided.

Effect Of Ion‐Beam Implantation On Seed Vigor Of Roegneria Kamoji Ohwi, Jihong Xie, Zuogong Wu, Yunzhang Liang, Zhu Xu, Linhang Li, Tingjie Hao, Yubao Ma

IGC Proceedings (1993-2023)

No abstract provided.

Effects Of Phosphorus And Potassium On Alfalfa Seed Quality, Xianguo Wang, Jianguo Han, Zhiguang Geng, Peisheng Mao, Yunwen Wang

IGC Proceedings (1993-2023)

No abstract provided.