Physical Sciences and Mathematics Commons^™

The Rise Of Science In Japan: 日本科学発展と原因, Mario Harper

Browse All Undergraduate research

日本の科学は第二次世界大戦から始まったと多くの人は思っている。もちろん、多くの発展は戦後に行われたのは事実。しかし、戦争以前にも「テクノロジージャパン」な考え方が非常に寿実していた。このスライドショーは日本科学発展の原因となることをいくつか見ています。

Histological Analysis Of Biological Tissues Using High-Frequency Ultrasound, Kristina Sorensen, Timothy Doyle, Brett D. Boret, Monica Cervantes, J. Andrew Chappell, Bradley J. Curtis, Matthew A. Grover, Janeese E. Stiles, Laurel A. Thompson

Browse All Undergraduate research

No abstract provided.

Electron Beam Induced Luminescence Of Sio2 Optical Coatings, John R. Dennison, Amberly Evans, Gregory Wilson, Charles W. Bowers, Robert Meloy

All Physics Faculty Presentations

Optical coatings of disordered thin film SiO2/SiOx dielectric samples on reflective metal substrates exhibited cathodoluminescence under electron beam irradiation. Measurements of the absolute radiance and emission spectra as functions of incident electron energy, flux and power over a range of sample temperatures are reported. Radiance reached a saturation plateau at high incident electron power. Well below saturation radiance scaled with deposited power, that is linearly with incident power for lower-energy non-penetrating electrons and decreasing with increasing energy for penetrating radiation. Four bands were observed in spectral measurements from 300 nm to 1000 nm. Changes in peak intensity and shifts in …

How To Create A Two-Component Spinor, Charles G. Torre

How to... in 10 minutes or less

Let (M, g) be a spacetime, i.e., a 4-dimensional manifold M and Lorentz signature metric g. The key ingredients needed for constructing spinor fields on the spacetime are: a complex vector bundle E -> M ; an orthonormal frame on TM ; and a solder form relating sections of E to sections of TM (and tensor products thereof). We show how to create a two-component spinor field on the Schwarzschild spacetime using the DifferentialGeometry package in Maple. PDF and Maple worksheets can be downloaded from the links below.

Electron Induced Charging And Arcing Of Multilayered Dielectric Materials, John R. Dennison, Gregory Wilson, Amberly Evans

All Physics Faculty Presentations

Measurements of the charge distribution in electron-bombarded, thin-film, multilayered dielectric samples showed that charging of multilayered materials evolves with time and is highly dependent on incident energy; this is driven by electron penetration depth, electron emission and material conductivity. Based on the net surface potential’s dependence on beam current, electron range, electron emission and conductivity, measurements of the surface potential, displacement current and beam energy allow the charge distribution to be inferred. To take these measurements, a thin-film disordered SiO2 structure with a conductive middle layer was charged using 200 eV and 5 keV electron beams with regular 15 s …

Electron Beam Induced Luminescence Of Sio2 Optical Coatings, John R. Dennison, Amberly Evans, Gregory Wilson, Charles W. Bowers, Robert Meloy

All Physics Faculty Publications

Optical coatings of disordered thin film SiO2/SiOx dielectric samples on reflective metal substrates exhibited cathodoluminescence under electron beam irradiation. Measurements of the absolute radiance and emission spectra as functions of incident electron energy, flux and power over a range of sample temperatures are reported. Radiance reached a saturation plateau at high incident electron power. Well below saturation radiance scaled with deposited power, that is linearly with incident power for lower-energy non-penetrating electrons and decreasing with increasing energy for penetrating radiation. Four bands were observed in spectral measurements from 300 nm to 1000 nm. Changes in peak intensity and shifts in …

Moonshine Ridge Hazardous Fuel Reduction Phase Ii, United States Department Of The Interior, Bureau Of Land Management

Environmental Assessments (UT)

The purpose of the Moonshine Ridge Hazardous Fuel Reduction Phase II project is to reduce the buildup of hazardous fuels that have accumulated over the last several decades in order to prevent the potential for large catastrophic fire events. In addition, the proposed action is needed to maintain important sage-steppe habitat for a variety of wildlife species in the project area.

Bottom Canyon Hazardous Fuel Reduction Phase Ii, United States Department Of The Interior, Bureau Of Land Management

Environmental Assessments (UT)

The purpose of the Bottom Canyon Hazardous Fuel Reduction Phase II project is to reduce the buildup of hazardous fuels that have accumulated over the last several decades in order to prevent the potential for large catastrophic fire events. In addition, the proposed action is needed to maintain important sage-steppe habitat for a variety of wildlife species in the project area.

Gasco Production Company Proposes To Drill 6 Oil Wells From 6 Existing Well Pads, United States Department Of The Interior, Bureau Of Land Management

Environmental Assessments (UT)

This Environmental Assessment (EA) has been prepared to analyze the potential impacts of GASCO Production Company (GASCO) oil well drilling project in the 8 Mile Flat area of Uintah County, Utah. GASCO has a valid existing right to extract mineral resources from federal leases UTU-16544, UTU-76262, UTU-75090 & UTU-78433 subject to the lease's terms and conditions. The BLM oil and gas leasing program encourages development of domestic oil and gas reserves and the reduction of U.S. dependence on foreign energy sources.

Cedar Electrodynamics Thermosphere Ionosphere (Eti) Challenge For Systematic Assessment Of Ionosphere/Thermosphere Models: Electron Density, Neutral Density, Nmf2, And Hmf2 Using Space Based Observations, J. S. Shim, M. Kuznetsova, L. Rastätter, D. Bilitza, L. Butala, M. Emery, B. Foster, T. J. Fuller-Rowell, J. Huba, A. J. Mannucci, X. Pi, A. Ridley, Ludger Scherliess, Jan Josef Sojka, P. Stephens, D. C. Thompson, D. Weimer, Lie Zhu, E. Sutton

All Physics Faculty Publications

In an effort to quantitatively assess the current capabilities of Ionosphere/Thermosphere (IT) models, an IT model validation study using metrics was performed. This study is a main part of the CEDAR Electrodynamics Thermosphere Ionosphere (ETI) Challenge, which was initiated at the CEDAR workshop in 2009 to better comprehend strengths and weaknesses of models in predicting the IT system, and to trace improvements in ionospheric/thermospheric specification and forecast. For the challenge, two strong geomagnetic storms, four moderate storms, and three quiet time intervals were selected. For the selected events, we obtained four scores (i.e., RMS error, prediction efficiency, ratio of the …

Ultrasonic Analysis Of Breast Tissue For Pathology Classification, Kristina Marie Sorensen

Undergraduate Honors Capstone Projects

Real time measurements may assist surgeons in obtaining negative or cancer free margins during lumpectomy to eliminate invasive re-excision. Previous findings show that high-frequency ultrasound can differentiate between a range of breast pathologies in surgical specimens. Two parameters, peak density and second-order spectral slope, are sensitive to histopathology. Our objective was to determine the mechanism linking high-frequency ultrasound to histology. The hypothesis is that ultrasound sensitivity is a function of the microscopic heterogeneity (and thus histology) of the tissue. Ultrasonic results from breast specimens were used to construct a multivariate analysis of the parameters that permitted differentiation of normal, adipose, …

The Octonions And The Exceptional Lie Algebra G2, Ian M. Anderson

Research Vignettes

The octonions O are an 8-dimensional non-commutative, non-associative normed real algebra. The set of all derivations of O form a real Lie algebra. It is remarkable fact, first proved by E. Cartan in 1908, that the the derivation algebra of O is the compact form of the exceptional Lie algebra G2. In this worksheet we shall verify this result of Cartan and also show that the derivation algebra of the split octonions is the split real form of G2.

PDF and Maple worksheets can be downloaded from the links below.

A Novel Analytical Solution To Steady-State Evaporation From Soil And Film Region Thickness, Morteza Sadeghi, Nima Shokri, Scott B. Jones

Plants, Soils, and Climate Faculty Publications

Evaporation from soil and other porous media constitutes a significant source of water loss affecting global water balance and energy exchange between land and atmosphere. The presence of a shallow water table can lead to sustained water loss that is dependent on porous media hydraulic properties and water table depth among other factors. In this paper, an exact analytical solution to steady state evaporation from porous media is developed using the Brooks-Corey hydraulic conductivity model. The solution is presented in terms of a set of infinite series. An advantage of this solution compared to previous derivations is that the infinite …

The Local Food Movement: Definitions, Benefits, And Resources, Roslynn Brain

Environment and Society Faculty Publications

What does it mean to eat locally? Although perceptions of what makes up “local food” differ by region (due in large part to varying climates, soil types, and populations), most researchers accept that eating locally means minimizing the distance between production and consumption, especially in relation to the modern mainstream food system (Peters et al., 2008). According to the 2008 Farm Act, a product can be marketed as locally or regionally produced if its end-point purchase is within 400 miles from its origin, or within state boundaries (Martinez et al., 2010). Most retailers, however, consider local to be on a …

Higher Order Symmetries Of The Kdv Equation, Ian M. Anderson

Research Vignettes

In this worksheet we symbolically construct the formal inverse of the total derivative operator and use it to construct the recursion operator for the higher-order symmetries of the KdV equation. Using this recursion operator we generate the first 5 generalized symmetries of the KdV equation and verify that they all commute.

PDF and Maple worksheets can be downloaded from the links below.

An Embedded-Atom-Method Model For Alkali-Metal Vibrations, D. Mark Riffe, Richard B. Wilson

All Physics Faculty Publications

We present an embedded-atom-method (EAM) model that accurately describes vibrational dynamics in the alkali metals Li, Na, K, Rb, and Cs. Bulk dispersion curves, frequency-moment Debye temperatures, and temperature-dependent entropy Debye temperatures are all in excellent agreement with experimental results. The model is also well suited for studying surface vibrational dynamics in these materials, as illustrated by calculations for the Na(110) surface.

Testing A Pyroclimatic Hypothesis On The Mexico-United States Border, Peter Z. Fule, Larissa L. Yocom Kent, Citlali Cortes Montano, Donald A. Falk, Julian Cerano, Jose Villanueva-Diaz

Wildland Resources Faculty Publications

The “pyroclimatic hypothesis” proposed by F. Biondi and colleagues provides a basis for testable expectations about climatic and other controls of fire regimes. This hypothesis asserts an a priori relationship between the occurrence of widespread fire and values of a relevant climatic index. Such a hypothesis provides the basis for predicting spatial and temporal patterns of fire occurrence based on climatic control. Forests near the Mexico–United States border offer a place to test the relative influence of climatic and other controls in mountain ranges that are ecologically similar and subject to broadly similar top-down climatic influence, but with differing cultural …

A Classroom Experiment: Implementing A Math-Talk Environment In A University Setting, Janice Bodily

All Graduate Plan B and other Reports, Spring 1920 to Spring 2023

A need for reform in teaching mathematics has long been recognized. The traditional classroom with the sage on the stage lacks a higher level of engagement for the students and therefore, produces a lower level of student satisfaction. The math-talk classroom is one attempt to engage students and to raise the level of interaction and discussion, thus enabling students to increase their level of comprehension. In an effort to create a math-talk experience in my Calculus II course, I applied the methodology of Thinking Through a Lesson Protocol (TTLP) to test its effectiveness in assisting the instructor in creating an …

A Prototype Automated Resolution Service For Public-Health Master Person Index, Sarvesh Jain

All Graduate Plan B and other Reports, Spring 1920 to Spring 2023

A Master Person Index (MPI) is a software system that links together the records about individuals from a diverse set of data sources and that allows data consumers to ¬¬retrieve correlated data for a given person. The Utah Department of Health recently contracted with Utah State University to build an MPI that links data from four initial data sources, and with enough extensibility that it will eventually handle dozens. This MPI, called the Utah Public-health Master Person Index or phMPI, was to include a special software component that automatically computed the “best version of truth” about each individual using correlated …

Pine Springs Hazardous Fuel Reduction Phase Ii, United States Department Of The Interior, Bureau Of Land Management

Environmental Assessments (UT)

The purpose of the Pine Springs Hazardous Fuel Reduction Phase II project is to reduce the buildup of hazardous fuels that have accumulated over the last several decades in order to prevent the potential for large catastrophic fire events. In addition, the proposed action is needed to maintain important sage-steppe habitat for a variety of wildlife species in the project area.

Urban Edibles: Weeds, Roslynn Brain, H. Waldbillig

Environment and Society Faculty Publications

They invade your garden, tap your soil’s precious nutrients and grow quicker than lightning strikes. If you can’t beat them, eat them! Increase your garden’s yield by identifying the edible weeds and adding them to your harvest.

Urban Edibles: Ornamentals, H. Waldbillig, Roslynn Brain

Environment and Society Faculty Publications

Who says the only place for city dwellers to pick up their daily dose of vegetables is the local farmers market or grocer? Much of the produce you need and enjoy is available to you in your own backyard and, better yet, is free of cost! Urban foraging is the art of finding, identifying and collecting wild edibles in everyday urban settings. From delicious fruits to weeds you would never in your wildest dreams think to eat, cities are full of handpicked eating opportunities!

Beef Production And Consumption: Sustainable Alternatives, Jennifer W. Macadam, Roslynn Brain

Environment and Society Faculty Publications

Sustainable living involves choosing a lifestyle with minimal environmental impacts. The ultimate goal is to leave future generations with a healthier environment than the one we were born into. How can we do that with beef consumption? Beef is part of American culture, so is there a way to make wiser choices when it comes to purchasing beef ? The short answer is, yes!

Vermicomposting, H. Waldbillig, Roslynn Brain

Environment and Society Faculty Publications

Vermicomposting, or worm composting as it is more commonly known, is the process of using worms to break down discarded food and other organic wastes and convert them into compost and liquid fertilizers. Not only will this process save you money, but it will also downscale your environmental footprint. Vermicompost systems can be purchased online or assembled cheaply by up-cycling materials found around the house or at a local thrift store.

The Effect Of Growth Parameters On The Height And Density Of Carbon Nanotube Forests, Robert Welch Call

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Rolled-up graphene sheets, known as carbon nanotubes, are grown in vertically aligned arrays called carbon nanotube forests (CNTFs). CNTFs make extremely dark surfaces. They are being investigated for use on space crafts as calibration surfaces and to protect optical sensors from unwanted signals. These CNTFs are grown by injecting a precursor consisting of a metal catalyst particle and a hydrocarbon component into a furnace at high temperature (~700°C). This study investigates the influence of several different growth parameters on the final height and density of the CNTF. Height and density influence the absorbance of the surface at different wavelengths.

Sigtree: An Automated Meta-Analytic Approach To Find Significant Branches In A Phylogenetic Tree, Todd R. Jones

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

An experiment was performed on two groups of mice, the first group receiving a refined wheat diet, and the second group receiving a whole wheat diet. The levels of abundance of hundreds of bacteria in the guts of the mice were measured. Of interest was whether the levels of these bacteria were different depending on type of diet. In addition, it was desired to examine differences by diet in all of the families of bacteria. These family relationships are represented in a tree, and it was determined helpful to color the branches of this tree based on the differences of …

A Mechanistic Study Of Catalytic Promiscuity In Protein Phosphatase 1, Yuan Chu

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

"Catalytic promiscuous" enzymes, which possess additional activities besides their "native" activity, albeit with a lower efficiency than the main reaction, have become a new frontier for biochemistry and have received considerable attention. Catalytic promiscuity has been suggested to contribute to enzyme evolution through the mechanism of gene duplication followed by specialization of one of the two copies for the new function. Mimicking this evolutionary shortcut could also provide a more efficient route to changing the function of proteins by directed evolution.

The promiscuous phosphatase PP1 is a member of the phosphoprotein phosphatase (PPP) gene family, which is critical for the …

The Chemical Evolution Of Oceanic And Continental Lithosphere: Case Studies In The Us Cordillera, Marlon Mauricio Jean

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Among the terrestrial planets, only Earth has volcanism and plutonism that is related to plate tectonics. At the bottom of the oceans, mid-ocean ridges form where tectonic plates drift apart. More visible, and explosively dangerous, is volcanism related to the subduction of oceanic plates back into the Earth’s mantle. Less clear is the origin of the third major type of volcanism, the so-called intra-plate volcanism, which is thought to represent thermally driven upwellings from the lower mantle. This dissertation investigates two of these unique volcano-tectonic settings which occur in the western United States.

Subduction zones are regions of intense earthquake …

A Homogeneous Solution Of The Einstein-Maxwell Equations, Charles G. Torre

Research Vignettes

We exhibit and analyze a homogeneous spacetime whose source is a pure radiation electromagnetic field [1]. It was previously believed that this spacetime is the sole example of a homogeneous pure radiation solution of the Einstein equations which admits no electromagnetic field (see [2] and references therein). Here we correct this error in the literature by explicitly displaying the electromagnetic source. This result implies that all homogeneous pure radiation spacetimes satisfy the Einstein-Maxwell equations.

PDF and Maple worksheets can be downloaded from the links below.

Carrying Biomath Education In A Leaky Bucket, James A. Powell, Brynja R. Kohler, James W. Haefner, Janice Bodily

Mathematics and Statistics Faculty Publications

In this paper, we describe a project-based mathematical lab implemented in our Applied Mathematics in Biology course. The Leaky Bucket Lab allows students to parameterize and test Torricelli’s law and develop and compare their own alternative models to describe the dynamics of water draining from perforated containers. In the context of this lab students build facility in a variety of applied biomathematical tools and gain confidence in applying these tools in data-driven environments. We survey analytic approaches developed by students to illustrate the creativity this encourages as well as prepare other instructors to scaffold the student learning experience. Pedagogical results …