Physical Sciences and Mathematics Commons^™

Mgrre_Geolog_Collections Sobota, Thomas P & Rose M 1-25 21101318990000, Mgrre Western Michigan University

Geolographs

No abstract provided.

The Jwst Early Release Science Program For Direct Observations Of Exoplanetary Systems. Iii. Aperture Masking Interferometric Observations Of The Star Hip 65426 At 3.8 Μm, Shrishmoy Ray, Steph Sallum, Sasha Hinkley, Anand Sivaramkrishnan, Rachel Cooper, Jens Kammerer, Alexandra Z. Greebaum, Deeparshi Thatte, Tomas Stolker, Cecilia Lazzoni, Andrei Tokovinin, Matthew De Furio, Samuel Factor, Michael Meyer, Jordan M. Stone, Aarynn Carter, Beth Biller, Andrew Skemer, Genaro Suárez, Jarron M. Leisenring, Marshall D. Perrin, Adam L. Kraus, Olivier Absil, William O. Balmer, Anthony Boccaletti, Mariangela Bonavita, Mickael Bonnefoy, Mark Booth, Brendan P. Bowler, Zackery W. Briesemeister, Marta L. Bryan, Per Calissendorff

Astronomy: Faculty Publications

We present aperture masking interferometry (AMI) observations of the star HIP 65426 at 3.8 μm, as part of the JWST Direct Imaging Early Release Science program, obtained using the Near Infrared Imager and Slitless Spectrograph instrument. This mode provides access to very small inner working angles (even separations slightly below the Michelson limit of 0.5λ/D for an interferometer), which are inaccessible with the classical inner working angles of the JWST coronagraphs. When combined with JWST’s unprecedented infrared sensitivity, this mode has the potential to probe a new portion of parameter space across a wide array of astronomical observations. Using this …

Perceptions Of Ai Skills In Resumes, Brandy Whitford, Patrick J. Cooper

Faculty and Staff Publications & Presentations

No abstract provided.

The Formation Of Glacier Dirt Cones, Ryan M. Strickland, Matthew D. Covington

Geosciences Faculty Publications and Presentations

Glacier dirt cones are meter-scale cones of ice covered with sediment and rock. The cones develop through a process known as differential melt, whereby ice underlying thick debris melts more slowly than bare ice. We report observations of dirt cones on the Kuskulana Glacier, Alaska and develop a model that simulates the growth of dirt cones from debris-filled pits in the ice. With this model, we vary ice melt rates, hillslope debris diffusion rates and pit geometry. Cone heights scale with the square root of debris volume and growth occurs in three distinct stages: emergence, flux-controlled growth and melt-controlled growth. …

2025 April 10 - Tennessee Weekly Drought Summary, Tennessee Climate Office, East Tennessee State University

Tennessee Climate Office Weekly Drought Summaries

No abstract provided.

Butte Priority Soils Operable Unit (Bpsou) 2025 Monthly Progress Report. Consent Decree For The Butte Priority Soils Operable Unit. Civil Action No. Cv 89-039-Bu-Seh, Josh Bryson

Silver Bow Creek/Butte Area Superfund Site

No abstract provided.

Approval Letter For The Butte Priority Soils Operable Unit (Bpsou) Draft Final Unreclaimed Sites (Ur-35) Remedial Action Work Plan (Rawp) (Dated June 14, 2024), Molly Roby

Silver Bow Creek/Butte Area Superfund Site

No abstract provided.

Comment Letter For The Butte Priority Soils Operable Unit (Bpsou) Butte Reclamation Evaluation System (Bres) Draft 2024 Field Evaluation Summary And Technical Recommendations Report (Dated November 15, 2024), Molly Roby

Silver Bow Creek/Butte Area Superfund Site

No abstract provided.

Utilizing Machine Learning To Predict The Charge Storage Capability Of Lithium-Ion Battery Materials, Manoj Chhetri, Karen S. Martirosyan

Physics & Astronomy Faculty Publications

With the increasing demand for high-performance batteries in applications such as electric vehicles and portable electronics, accurately predicting the charge storage capacity of battery materials is crucial for developing more efficient and reliable energy storage systems. Machine Learning (ML) and data-driven approaches, plays a vital role in enhancing our understanding of Li-ion battery performance, guiding materials design, optimizing system efficiency, and accelerating innovation in energy storage technologies. In this study, an ML-based approach was applied to a dataset of 2345 rechargeable Li-ion battery materials, obtained from the Materials Project online portal, to predict gravimetric charge storage capacity ─ a key …

Boron Nitride Nanosheets, Quantum Dots, And Dots: Synthesis, Properties, And Biomedical Applications, Raksha Dubey, Matthew Cowles, Zohreh Salimi, Xiuling Liu, Rodney Oakley, Nazmiye B. Yapici, Join Uddin, Dongyan Zhang, Yoke Khin Yap

Michigan Tech Publications

This review examines three aspects of hexagonal boron nitride (h-BN) nanomaterials: properties, synthesis methods, and biomedical applications. We focus the scope of review on three types of h-BN nanostructures: boron nitride nanosheets (BNNSs, few-layered h-BN, larger than ∼100 nm in lateral dimensions), boron nitride quantum dots (BN QDs, smaller than ∼10 nm in all dimensions, with inherent excitation-dependent fluorescence), and boron nitride dots (BN dots, smaller than ∼10 nm in all dimensions, wide bandgap without noise fluorescence). The synthesis methods of BNNSs, BN QDs, and BN dots are summarized in top-down and bottom-up approaches. Future synthesis research should focus on …

Data-Driven Strategy For Contact Angle Prediction In Underground Hydrogen Storage Using Machine Learning, Mehdi Nassabeh, Zhenjiang You, Alireza Keshavarz, Stefan Iglauer

Research outputs 2022 to 2026

In response to the surging global demand for clean energy solutions and sustainability, hydrogen is increasingly recognized as a key player in the transition towards a low-carbon future, necessitating efficient storage and transportation methods. The utilization of natural geological formations for underground storage solutions is gaining prominence, ensuring continuous energy supply and enhancing safety measures. However, this approach presents challenges in understanding gas-rock interactions. To bridge the gap, this study proposes a data-driven strategy for contact angle prediction using machine learning techniques. The research leverages a comprehensive dataset compiled from diverse literature sources, comprising 1045 rows and over 5200 data …

Inconsistencies With The Drumian Carbon Isotope Excursion (Dice) In West-Central Utah, Michelle Norman

Student Research Symposium

Geologic Setting

• During the Cambrian Period (539-485.4Ma), the western US was submerged by a shallow ocean
• Carbon cycle fluctuations in stable carbon were preserved in marine sediments
• One such period of geologic time, the Drumian Age (500Ma), is defined by the first appearance of a deepwater trilobite, P. atavus, in west-central Utah
• Researchers have hypothesized we can find Drumian-aged rocks without the fossils using carbon cycle fluctuations preserved in limestone
• the Drumian Carbon Isotope Excursion (DICE) is defined as a -2.5‰ fluctuation in global carbon-bearing rocks

Data Science For Engineers, Heidi Moulton

Student Research Symposium

30% of USU undergraduate students participate in some sort of research, and for engineering students this often means generating large amounts of data.

Data Science for Engineers is a series of four modules that introduce students to data processing, visualization, and graphing in the Python programming language using Pandas DataFrames and Juypter Notebooks.

The modules are intended for students with a basic understanding of programming in Python, specifically those who have taken CS 1400 Introduction to Computer Science.

The Stem Gender Gap: Can It Be Closed?, Makenna Roberts

Student Research Symposium

Introduction

While many industries have achieved gender parity, women remain underrepresented in STEM fields, with participation stagnating between 32% and 35% from 2011 to 2021. Research suggests this gap is influenced by relative cognitive strengths and social/societal factors. This study analyzes two datasets: (1) SAT score report data from the National College Board and (2) employment data from the 2021 NCSES Survey of Recent College Graduates. Findings highlight disparities at the highest percentiles and lower workforce participation among female STEM graduates.

To Bee Or Not To Bee: Investigating Pesticide Behavior Inside And Outside Semi-Field Cages, Mallory Bingham

Student Research Symposium

Background

Pesticides are vital in preventing crop damage from pests but are cited as a key factor in decreasing bee populations.¹ The alfalfa leaf cutting bee is essential in alfalfa seed production in the Western US.² Current research seeks to examine the effects of pesticides on these solitary bees to maintain healthy populations while controlling pests.³

One research tool commonly used to examine pesticide effects on bees is field-cages. Field cages are thought to simulate agroecosystem conditions while restricting bees to plots that have been sprayed with pesticides.^1,4

However, environmental conditions can be different inside and …

Measuring Small Currents At Fast Speeds Using A 2Nd Generation Electrometer, Donna Metcalf

Student Research Symposium

The Electron Emission Test (EET) chamber in the Utah State University Materials Physics Group (MPG) is used to determine the electron yield of highly insulating materials. An electrometer is employed alongside the EET chamber to measure the output current of 10-6 to 10-14 pulses of 10-7 seconds to DC duration. In previous years, a first- generation electrometer was used for these measurements. However, the introduction of a new electrometer presents an opportunity to achieve faster measurement speeds and improved sensitivity to smaller current values.

Effect Of Geomagnetic Activity On Radio Propagation In The 14 And 18 Mhz Range, Stuart Barney

Student Research Symposium

The purpose of this experiment was to discover if the magnitude of a geomagnetic event has a notable effect on the reliability of the reception of a radio transmission given the location of origin.

Automatic Aurora Detection, Cameron Eggleston

Student Research Symposium

Aurorae happen when particles in the earth’s magnetosphere become excited and emit visible light. Below is a picture that shows this process more meaningfully:

The colors of each aurora is determined by these electrons as well. Below is a diagram showing where the different colors of aurora come from. In addition to being nice to look at, aurorae can be caused by Coronal Mass Ejections(CMEs). CMEs can affect radio communication, power grids, GPS systems, and more.

Expressing And Purifying Homologs Of Crispr Systems, Gabe Parrish

Student Research Symposium

CRISPR (Clustered Regularly Interspaced Palindromic Repeat)-Cas (CRISPR- associated) is a protein-nucleic acid adaptive immune system in Bacterial and Archaeal organisms that defends against invading foreign genetic material.

Earthquakes In Creeping Fault Zones? Mineralogic And Grain Size Controls On Frictional Behavior, Ainsley Macdonald

Student Research Symposium

1. Motivation

• Faults can creep or be locked to produce earthquakes.

• This behavior may be influenced by minerology and grain size

• Serpentine minerals and clay are known to promote creep along faults

• Does mineralogy promote creep along the Bartlett Springs Fault, CA?

Does Exercising With A Romantic Partner Improve Physical, Emotional, And Relational Well-Being?, Abbie Whitehead

Student Research Symposium

While exercise is known to benefit both physical and mental health, working out with a partner may amplify those benefits. Could exercising with a romantic partner further enhance these outcomes---while also improving relationship quality?

Are Rotating Black Holes Rigid?, Luis Fernando Temoche

Student Research Symposium

What is rigidity for a black hole?

2017 Seasonal Variation Of Atmospheric Gravity Waves Above Rothera Station, Antarctica, Elijah Kroeber, Zhao Yucheng, Pautet Dominique, Taylor Michael

Student Research Symposium

As a part of the international Antarctic Gravity Wave Instrument Network (ANGWIN), Utah State University operates an infrared (IR) all-sky imager at the British Rothera Station in Antarctica (67°34’S, 68°07’W) which observes several hydroxyl (OH) emission bands.

Electron-Phonon Coupling In Copper, Joseph Pigott

Student Research Symposium

The behavior of metals is all about the motion and behavior of the metal's electrons. When interactions between the electrons and vibrations in the crystal lattice (phonons) are considered, the electrons act as if they are "heavier" than they otherwise would be. This is accounted for by introducing the mass- enhancement parameter λ, which represents the strength of electron- phonon interactions. This study explores whether λ can be accurately calculated by comparing literature data for two known quantities: the electronic coefficient of specific heat and the density of states at the Fermi energy.

The Applicability Of A/B Testing In Clinical Trials, Carlie Prinster

Student Research Symposium

• A/B Testing is a study method that allows researchers to compare two different options in a variety of different contexts, most usually in a business context (i.e.: font color).

• A/B Testing is starting to used in biostatistical application, such as for clinical trial recruitment improvement.

• A study done by previous researchers aimed to apply A/B Testing to clinical trial recruitment improvement.

• My goal was to build a model that used the data from this study but implement a dependent structure.

Ion-Induced Electron Yield Database Development Through Data Mining For Exploratory Data Analysis And Predictive Analytics, Trace Taylor

Student Research Symposium

• What is ion yield and what affects it?

• Why create a database?

• Status of the database

• Ion yield data comparisons

• Conclusions

• Future work

Grassland For Our World, F Riveros

IGC Proceedings (1977-2023)

The present-day role of grasslands and fodder is reviewed with respect agriculture, animal production and environmental concerns. The world 's grazing lands are a finite resource nnd, overall, are being badly mnnaEed; in most developing countries action is required now, before it is too lnte. They will continue to be a major source of animal feed for the foreseeable future; encroachment from cropping will con

Human Impact On Terrestrial Ecosytems- What We Know And What We Are Doing About It, H A. Mooney

IGC Proceedings (1977-2023)

At present the impact of humankind on the Barth System is substantial mul will become greater as we continue to add over 80 million people to the global population each year. Collectively the human species utilises over a third of the total fresh water that is available, as well as an equivalent amount of tho total terrestrial productivity. Possil energy is being consumed at a prodigious rnte and fuels, among other things, over a half a billion vehicles. To support the large human population the Earth has been greatly reconfigured with much of the land utilised for grazing and agriculture. …

Grasslands For Sustainable Ecosystems, Malcolm Hadley

IGC Proceedings (1977-2023)

Grasslnnds present many advantages for examining issues related to sustainability. Grasslands include planted pastures as well as a variety of natural rangelands in situations ranging from semi-arid to subhumid. Diversity is also reflected in the spectrum of grassland users and uses, for example, nomadic pastoralism, extensive ranches, intensive pastures, wildlife tourism, game hunting. And in terms of sustainability of resource management, grasslands encompass a wide range of contrasting situations and conflicts in resource use. Heavy grazing pressure associated with increasing human populations in certain tropical savannas, the implications of rural depopulation to traditional pasture management in alpine regions, and the …

Red Clover Hybrid Ryegrass Associations Results Obtained From 1984 To 1987 In Four French Regions, C Pfitzenmeyer, C Longueval

IGC Proceedings (1977-2023)

In France, red clover is often grown in association with a grass in order, if not to increase the yield of forage, at least to improve its quality by having a larger protein content in the harvested product. Among the grass species associated to red clover, Italian ryegrass, too aggressive a competitor, is replaced more and more by hybrid ryegrass. The aims of the present work were the following

1% to obtain quantitative references on the behaviour o[ hybrid ryegrass/red clover associations in four contrasting regions of France ;

2% to check that the presence of clover, through the transfer …