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2022

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Full-Text Articles in Physical Sciences and Mathematics

Drought Levels In Nevada Counties, 2022, Julianna Jovillar, Caitlin J. Saladino, William E. Brown Jr. Dec 2022

Drought Levels In Nevada Counties, 2022, Julianna Jovillar, Caitlin J. Saladino, William E. Brown Jr.

Environment

This fact sheet synthesizes data on drought levels within Nevada counties from the National Integrated Drought Information System (NIDIS) in 2022. The information presented in this document focuses on the breakdown of the number of Nevada residents affected by the droughts within each county and the drought experience in each county.

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Mgrre_Thinsections_Reno 1-27_1, Mgrre Dec 2022

Mgrre_Thinsections_Reno 1-27_1, Mgrre

Thin Sections

No abstract provided.

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Mgrre_Thinsections_Reno 1-27_7, Mgrre Dec 2022

Mgrre_Thinsections_Reno 1-27_7, Mgrre

Thin Sections

No abstract provided.

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Efforts Towards The Asymmetric De Novo Synthesis Of Lanostanes And Euphanes, Htoo Tint Wai Dec 2022

Efforts Towards The Asymmetric De Novo Synthesis Of Lanostanes And Euphanes, Htoo Tint Wai

Dartmouth College Ph.D Dissertations

Tetracyclic triterpenoids are ubiquitous in nature and biology, with members displaying a wide range of medically relevant properties and occupying rather distinct regions of chemical space. Members of this large class include well-known steroid hormones and sterols as well as structurally interesting subclasses such as lanostanes and euphanes, among others. Comprised of the tetracyclic skeleton with three stereodefined quaternary centers at ring-junction positions, lanostanes and euphanes present synthetic challenges that are different from those encountered in efforts targeting the structurally less complex steroid hormones. Lanostanes, in particular, stand as a historically important class of compounds as significant attention has been …

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Recovery Of Cu-Ce From Copper Slag By Using Flotation And Chemical Methods, Bekir Başkurt, Mete Tayhan Serdengeçti̇, Kaan Özçeli̇k, Hüseyin Baştürkcü Dec 2022

Recovery Of Cu-Ce From Copper Slag By Using Flotation And Chemical Methods, Bekir Başkurt, Mete Tayhan Serdengeçti̇, Kaan Özçeli̇k, Hüseyin Baştürkcü

Bulletin of the Mineral Research and Exploration

In our days, slags are considered secondary resources due to the metals they contain. Copper slags having economical operating grades in terms of Zn, Cu, Ce, Ni, Co, Mo, and V, have complex mineralogy due to their thermal processing based formations. Methods of recovery for copper and other precious metals from slags, have been studied, and for which, flotation plants in industrial scale are operated. In cases where physical or physico-chemical mineral processing methods are not sufficient, hydrometallurgical methods are applied. In this study, the flotation method was applied to a copper slag with 0.9% Cu grade. Copper recovery and …

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Industry 4.0, Zachary Zeitler Dec 2022

Industry 4.0, Zachary Zeitler

Honors Theses

The ultimate goal of this project is to automate quality control processes on various machines which include 3D printers, welders, routers, CNCs, and more. Using the “Digital Twin” approach, we want to automate monitoring, data collection, data analysis, and corrective action. Our involvement begins with building a new piece of software that can perform two specific functions and collect data from cameras. We are not attempting to analyze the data, make corrective action, or design a final version of the physical attributes. Our software provides the user with the ability to capture an image set or a 3D scan and …

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Ultrafast Electron Diffraction: Visualizing Dynamic States Of Matter, D. Filippetto, P. Musumeci, R. K. Li, B. J. Siwick, M. R. Otto, Martin Centurion, J. P. F. Nunes Dec 2022

Ultrafast Electron Diffraction: Visualizing Dynamic States Of Matter, D. Filippetto, P. Musumeci, R. K. Li, B. J. Siwick, M. R. Otto, Martin Centurion, J. P. F. Nunes

Department of Physics and Astronomy: Faculty Publications

Since the discovery of electron-wave duality, electron scattering instrumentation has developed into a powerful array of techniques for revealing the atomic structure of matter. Beyond detecting local lattice variations in equilibrium structures with the highest possible spatial resolution, recent research efforts have been directed toward the long-sought-after dream of visualizing the dynamic evolution of matter in real time. The atomic behavior at ultrafast timescales carries critical information on phase transition and chemical reaction dynamics, the coupling of electronic and nuclear degrees of freedom in materials and molecules, and the correlation among structure, function, and previously hidden metastable or nonequilibrium states …

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Assessing The Impact Of Storage Time And Shape Of The Block On The Slicability Of Commercial Cheddar Cheese, Nathan Pace Dec 2022

Assessing The Impact Of Storage Time And Shape Of The Block On The Slicability Of Commercial Cheddar Cheese, Nathan Pace

Fall Student Research Symposium 2022

Cheddar cheese is one of the world's most popular cheeses and is consumed in blocks and slices. The slicability of cheddar cheese can depend on textural and rheological properties. Understanding these characteristics can enhance desirability and reduce material loss occurring during slicing. In this study, we focused on four main parameters: slice thickness, cheese shape, storage period, and cheese type. Four thicknesses (0.5, 1.0, 1.5, and 2.0 mm) and two shapes (triangular and square) of mild, medium, sharp, and extra sharp were selected. Cheeses were purchased from Walmart and the Utah State University creamery. At first, cheese blocks were cut …

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Why America Should Switch To Nuclear Energy As Its Primary Power Source, William Fike Dec 2022

Why America Should Switch To Nuclear Energy As Its Primary Power Source, William Fike

Fall Student Research Symposium 2022

While nuclear waste and public fear hurt the image of nuclear energy, I believe that nuclear energy should be used instead of alternative power sources because it is safe, carbon-free, and more fuel efficient than alternative energy sources. Nuclear power is the process of using uranium 235 to make energy. Nuclear energy is a very clean and safe energy producer. My target audience would be someone who does not know a lot about nuclear power. Or they are possibly scared because of past nuclear disasters. My goal in this poster is to convince you that nuclear power is safe and …

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Electron Yield Measurements Of Highly Insulating Granular Samples Related To Charging Of Dusty Plasmas, Heather Allen Dec 2022

Electron Yield Measurements Of Highly Insulating Granular Samples Related To Charging Of Dusty Plasmas, Heather Allen

Fall Student Research Symposium 2022

Reliable electron yield (EY) measurements of highly insulating granular particles have long been considered too difficult to collect due the many experimental complexities that arise from the nature of the granular materials. This has led to a critical knowledge gap for both engineering strategies and basic science issues essential for myriad important space applications. This talk will emphasize the preliminary EY measurements of highly insulting granular samples we have collected, including a range of samples with typical particle size ranging from ~1 μm to ~100 μm, samples with cubical, spherical and highly angular particle shapes, studies of highly angular Al2O3 …

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The Spectral Features And Detectability Of Small, Cyclic Silicon Carbide Clusters, Christopher M. Sehring, C. Zachary Palmer, Brent R. Westbrook, Ryan C. Fortenberry Dec 2022

The Spectral Features And Detectability Of Small, Cyclic Silicon Carbide Clusters, Christopher M. Sehring, C. Zachary Palmer, Brent R. Westbrook, Ryan C. Fortenberry

Faculty and Student Publications

Rovibrational spectral data for several tetra-atomic silicon carbide clusters (TASCCs) are computed in this work using a CCSD(T)-F12b/cc-pCVTZ-F12 quartic force field. Accurate theoretical spectroscopic data may facilitate the observation of TASCCs in the interstellar medium which may lead to a more complete understanding of how the smallest silicon carbide (SiC) solids are formed. Such processes are essential for understanding SiC dust grain formation. Due to SiC dust prevalence in the interstellar medium, this may also shed light on subsequent planetary formation. Rhomboidal Si2C2 is shown here to have a notably intense (247 km mol−1) anharmonic vibrational frequency at 988.1 cm−1 …

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A High-Accuracy Detection System: Based On Transfer Learning For Apical Lesions On Periapical Radiograph, Yueh Chuo, Wen-Ming Lin, Tsung-Yi Chen, Mei-Ling Chan, Yu-Sung Chang, Yan-Ru Lin, Yuan-Jin Lin, Yu-Han Shao, Chiung-An Chen, Patricia Angela R. Abu Dec 2022

A High-Accuracy Detection System: Based On Transfer Learning For Apical Lesions On Periapical Radiograph, Yueh Chuo, Wen-Ming Lin, Tsung-Yi Chen, Mei-Ling Chan, Yu-Sung Chang, Yan-Ru Lin, Yuan-Jin Lin, Yu-Han Shao, Chiung-An Chen, Patricia Angela R. Abu

Department of Information Systems & Computer Science Faculty Publications

Apical Lesions, one of the most common oral diseases, can be effectively detected in daily dental examinations by a periapical radiograph (PA). In the current popular endodontic treatment, most dentists spend a lot of time manually marking the lesion area. In order to reduce the burden on dentists, this paper proposes a convolutional neural network (CNN)-based regional analysis model for spical lesions for periapical radiographs. In this study, the database was provided by dentists with more than three years of practical experience, meeting the criteria for clinical practical application. The contributions of this work are (1) an advanced adaptive threshold …

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College Teaching And Ai, Leo Irakliotis Dec 2022

College Teaching And Ai, Leo Irakliotis

Computer Science: Faculty Publications and Other Works

Artificial Intelligence will reshape the way we assess student learning in ways that no one has prepared us for.

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Larval Ecology Of Atlantic Bluefin Tuna (Thunnus Thynnus): New Insights From Otolith Microstructure, Biotic, And Abiotic Analyses From The Gulf Of Mexico And Mediterranean Sea, Estrella Malca Dec 2022

Larval Ecology Of Atlantic Bluefin Tuna (Thunnus Thynnus): New Insights From Otolith Microstructure, Biotic, And Abiotic Analyses From The Gulf Of Mexico And Mediterranean Sea, Estrella Malca

All HCAS Student Capstones, Theses, and Dissertations

Atlantic bluefin tuna (ABT), Thunnus thynnus, spawn in the Gulf of Mexico (GoM) and the Mediterranean Sea (MED). Spawning occurs within narrow temporal and environmental parameters. Efforts to characterize growth of ABT in wild conditions revealed a wide range of growth variability during the early life stages. This series of studies examined potential biotic and abiotic influences of larval growth from seven ABT cohorts, and identified several key drivers of growth for this commercially valuable species. A detailed investigation of larval dynamics using otolith microstructure was conducted as follows. First, companion growth curves and stable isotope analysis from the same …

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Possibilities For Inertial Electrostatic Confinement Fusion, Jeffrey Edward Black Dec 2022

Possibilities For Inertial Electrostatic Confinement Fusion, Jeffrey Edward Black

Dissertations and Theses

While most of the fusion energy research is focused on magnetic confinement, there have been several alternative confinement methods aimed at the development of smaller and less expensive reactors. A number of these devices utilize a spherically convergent beam of recirculating ions, a technique known as inertial electrostatic confinement (IEC). This study looks at several aspects of IEC devices, including measurements of the fusion rate of an IEC device with a wire mesh electrode cathode, and a solid titanium cathode. In addition, several computational studies were performed to explore the possibilities for IEC fusion. These include development of a 1D-1P …

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Eat Your Invasives: A Practical And Historical Analysis Of Foraging For Invasive Foods, Grace Hartman Dec 2022

Eat Your Invasives: A Practical And Historical Analysis Of Foraging For Invasive Foods, Grace Hartman

Honors Projects

This paper discusses both the historical and modern role of foraging and why people may decide to forage, as well as barriers new foragers may face and how they can be overcome. Furthermore, the paper discusses how foraging for invasive species can be used as a method of conservation and how simple foraging can be encouraged for this reason.

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Meertens Number And Its Variations, Chai Wah Wu Dec 2022

Meertens Number And Its Variations, Chai Wah Wu

Communications on Number Theory and Combinatorial Theory

In 1998, Bird introduced Meertens numbers as numbers that are invariant under a map similar to the Gödel encoding. In base 10, the only known Meertens number is 81312000. We look at some properties of Meertens numbers and consider variations of this concept. In particular, we consider variations of Meertens numbers where there is a finite time algorithm to decide whether such numbers exist, exhibit infinite families of these variations and provide bounds on parameters needed for their existence.

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On The Diagonalizability And Factorizability Of Quadratic Boson Fields, Luigi Accardi, Andreas Boukas, Yungang Lu, Alexander Teretenkov Dec 2022

On The Diagonalizability And Factorizability Of Quadratic Boson Fields, Luigi Accardi, Andreas Boukas, Yungang Lu, Alexander Teretenkov

Journal of Stochastic Analysis

No abstract provided.

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Closing The Concern-Action Gap Through Relational Climate Conversations: Insights From Us Climate Activists, Julia Coombs Fine Dec 2022

Closing The Concern-Action Gap Through Relational Climate Conversations: Insights From Us Climate Activists, Julia Coombs Fine

Environmental Studies Faculty Publications

Several studies have found that relational climate conversations can be an effective method of increasing conversational participants’ concern about the climate crisis and encouraging them to take collective action. However, little work has yet examined how such conversations are practiced by climate activists, a group with expertise in relational organizing. Drawing on surveys and semi-structured interviews with climate activists across the USA, this analysis finds that activists frequently have climate conversations with friends and family, most of whom are politically progressive and somewhat to very concerned about the climate crisis. These findings might seem to suggest that climate activists only …

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Some Thoughts On The Morphotectonic Development Of The Denizli Region, Yücel Yilmaz Dec 2022

Some Thoughts On The Morphotectonic Development Of The Denizli Region, Yücel Yilmaz

Bulletin of the Mineral Research and Exploration

The Denizli region is located to the east of the Buldan Horst. Although they follow the same trends as the Büyük Menderes and Gediz grabens, the Denizli region has undergone semi-independent evolution during the Quaternary. The essential morphotectonic elements of the area are the Denizli Basin and the surrounding Babadağ and the Güzelpınar Horsts. The Babadağ Horst is the most distinct morphotectonic element of the region. It is bounded in the north by the Denizli fault, a listric normal fault, and possibly a major detachment fault. The Laodicea and Güzelpınar Horsts located within the downthrown block of the fault may …

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Investigating The Color-Changing Properties Of Poly-Phenyl Sulfide, Dallen Dewaal Dec 2022

Investigating The Color-Changing Properties Of Poly-Phenyl Sulfide, Dallen Dewaal

Fall Student Research Symposium 2022

Investigating the Color-Changing Properties of Poly-Phenyl Sulfide Dallen DeWaal, Megan Loveland DeWaal, Heather Allen, JR DennisonMaterials Physics Group, Physics Department, Utah State UniversityAbstractWhile preparing samples of FortronTM PPS (poly-phenyl sulfide) for spacecraft charging testing, it was discovered that the polymeric dielectric material exhibits color-changing properties from mechanical forces while shearing and bending. Given enough time, PPS reverts from blue-green back to its original tan color. PPS samples were characterized by the magnitude of color change and recovery time. PPS samples were subjected to multiple tests to discover which forms of energy input activate the color change, and which (if any) …

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The Effect Of The Plant-Based Diet On Athletes And Its Limitations, Dylan Hill Dec 2022

The Effect Of The Plant-Based Diet On Athletes And Its Limitations, Dylan Hill

Fall Student Research Symposium 2022

In this study, I was hoping to learn more about the differences between the omnivore diet and plant-based diet in relation to the effects on an athlete. Research was conducted using library and internet resources to locate both primary and secondary research. For this study, personal accounts and experiences of athletes who had experimented with a plant based diet were examined. Research showed that although a very enticing option for a healthy diet for athletes, the plant-based diet is just as effective as a balanced omnivore diet but much more difficult to do properly and is much less accessible to …

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The Planets, Reimagined: Translating Science Into Music, Kaitlyn Wincup Dec 2022

The Planets, Reimagined: Translating Science Into Music, Kaitlyn Wincup

Honors Projects

Inspired by Gustav Holst’s The Planets, this project analyzed the qualitative properties of the planets in our Solar System and translated them into a composition, created by Connor Gibbs, to represent an overall aural depiction of each planet. Where Holst created an astrological depiction of each of the planets, this piece is an astronomical depiction that broadens the perspectives of its listeners.

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Exposure Of Egyptian Rousette Bats (Rousettus Aegyptiacus) And A Little Free-Tailed Bat (Chaerephon Pumilus) To Alphaviruses In Uganda, Rebekah C. Kading, Erin M. Borland, Eric C. Mossel, Teddy Nakayiki, Betty Nalikka, Jeremy P. Ledermann, Mary B. Crabtree, Nicholas A. Panella, Luke Nyakarahuka, Amy T. Gilbert, Julian C. Kerbis-Peterhans, Jonathan S. Towner, Brian R. Amman, Tara K. Sealy, Barry R. Miller, Julius J. Lutwama, Robert M. Kityo, Ann M. Powers Dec 2022

Exposure Of Egyptian Rousette Bats (Rousettus Aegyptiacus) And A Little Free-Tailed Bat (Chaerephon Pumilus) To Alphaviruses In Uganda, Rebekah C. Kading, Erin M. Borland, Eric C. Mossel, Teddy Nakayiki, Betty Nalikka, Jeremy P. Ledermann, Mary B. Crabtree, Nicholas A. Panella, Luke Nyakarahuka, Amy T. Gilbert, Julian C. Kerbis-Peterhans, Jonathan S. Towner, Brian R. Amman, Tara K. Sealy, Barry R. Miller, Julius J. Lutwama, Robert M. Kityo, Ann M. Powers

United States Department of Agriculture Wildlife Services: Staff Publications

The reservoir for zoonotic o’nyong-nyong virus (ONNV) has remained unknown since this virus was first recognized in Uganda in 1959. Building on existing evidence for mosquito bloodfeeding on various frugivorous bat species in Uganda, and seroprevalence for arboviruses among bats in Uganda, we sought to assess if serum samples collected from bats in Uganda demonstrated evidence of exposure to ONNV or the closely related zoonotic chikungunya virus (CHIKV). In total, 652 serum samples collected from six bat species were tested by plaque reduction neutralization test (PRNT) for neutralizing antibodies against ONNV and CHIKV. Forty out of 303 (13.2%) Egyptian rousettes …

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A View Into Secondary Education Mathematics, Thomas Krieger Jr. Dec 2022

A View Into Secondary Education Mathematics, Thomas Krieger Jr.

Honors Theses

Teaching methods, and the effects they can have on students, are important to consider for a classroom because when teaching you should allow for every student to have an opportunity. Every student should feel encouraged in the classroom, however not every method may allow for that. An important task for a teacher is to find out how to reach their students in their classroom; be it adapting methods or choosing when to implement one item over another. This task differs with every student that enters the classroom as no student is the same. Every students’ differences stem from their academic …

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Effects Of Exposure To Atmospheric Humidity On Breakdown Field Strength Measurements Of Polymers, Megan Loveland Dewaal Dec 2022

Effects Of Exposure To Atmospheric Humidity On Breakdown Field Strength Measurements Of Polymers, Megan Loveland Dewaal

Fall Student Research Symposium 2022

This study investigates the effects of absorbed water introduced via exposure to atmospheric humidity on electrostatic breakdown field strength measurements of polymers. Conducting breakdown tests under sample conditions appropriate for different applications is essential. If the breakdown field strength is overestimated for an application, an insulator may be used inappropriately in high electric fields where they are more likely to break down. Comparisons are made between: sets of pristine samples, samples that underwent a thorough vacuum bake out to evaporate absorbed water, and samples subject to subsequent incremental prolonged atmospheric exposure. These investigated the effects of absorbed water and determined …

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One-Parameter Darboux-Deformed Fibonacci Numbers, Stefani C. Mancas, H. C. Rosu Dec 2022

One-Parameter Darboux-Deformed Fibonacci Numbers, Stefani C. Mancas, H. C. Rosu

Publications

One-parameter Darboux deformations are effected for the simple ODE satisfied by the continuous generalizations of the Fibonacci sequence recently discussed by Faraoni and Atieh [Symmetry 13, 200 (2021)], who promoted a formal analogy with the Friedmann equation in the FLRW homogeneous cosmology. The method allows the introduction of deformations of the continuous Fibonacci sequences, hence of Darboux-deformed Fibonacci (non integer) numbers. Considering the same ODE as a parametric oscillator equation, the Ermakov-Lewis invariants for these sequences are also discussed.

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Six-Dimensional Single-Molecule Imaging With Isotropic Resolution Using A Multi-View Reflector Microscope, Oumeng Zhang, Zijian Guo, Yuanyuan He, Tingting Wu, Michael D. Vahey, Matthew D. Lew Dec 2022

Six-Dimensional Single-Molecule Imaging With Isotropic Resolution Using A Multi-View Reflector Microscope, Oumeng Zhang, Zijian Guo, Yuanyuan He, Tingting Wu, Michael D. Vahey, Matthew D. Lew

Electrical & Systems Engineering Publications and Presentations

Imaging of both the positions and orientations of single fluorophores, termed single-molecule orientation-localization microscopy, is a powerful tool for the study of biochemical processes. However, the limited photon budget associated with single-molecule fluorescence makes high-dimensional imaging with isotropic, nanoscale spatial resolution a formidable challenge. Here we realize a radially and azimuthally polarized multi-view reflector (raMVR) microscope for the imaging of the three-dimensional (3D) positions and 3D orientations of single molecules, with precisions of 10.9 nm and 2.0° over a 1.5-μm depth range. The raMVR microscope achieves 6D super-resolution imaging of Nile red molecules transiently bound to lipid-coated spheres, accurately resolving …

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Light Scattering From Periodic Conducting Nanostructures, Wesley Mills Dec 2022

Light Scattering From Periodic Conducting Nanostructures, Wesley Mills

Fall Student Research Symposium 2022

Carbon nanotube (CNT) forests are roughly vertically aligned carbon tubes with a diameter of a few nanometers, and a height of hundreds of micrometers. CNT forests of proper densities and heights can be excellent absorbers of visible light, so a lot of interest has been generated in their application in optical calibration, energy conversion, antireflection, and radiometry. Unfortunately, reflectance from CNTs rises quickly above the mid-infrared range, limiting their present use. Improving a CNT-based broadband absorber requires understanding why the forests have almost zero visible-light reflectance, as well as a strategy to extend that low reflectance into longer wavelengths. Since …

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How Does Perceived Human Instability Affect One's Own Stability?, Madi Braunersrither Dec 2022

How Does Perceived Human Instability Affect One's Own Stability?, Madi Braunersrither

Fall Student Research Symposium 2022

Participants were prompted to evaluate the stability of pictured human postures while standing on a force plate. We measured irregularity by analyzing the presence of patterns in the sequential center of pressure values. To measure the presence of patterns, sample entropy, a time series statistic, was developed and we utilized it on the force plate data. Does one's own stability change when viewing a posture deemed unstable? Is Sample Entropy (SampEn) an effective tool to determine stability? This relationship could have implications for modeling the progression of motor skills, understanding human development, and the design of environments for rehabilitation.

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