333 Works

Data from: Insight into The Nature of Rim Bonds in Coronene

Alexander Boldyrev & Nikita Fedik
Project reports bonding analysis and predicted reactivity of coronene.

Data from: High-Resolution Photoelectron Imaging of IrB3-: Observation of a p-Aromatic B3+ Ring Coordinated to a Transition Metal

Alexander Boldyrev & Maksim Kulichenko
In a high-resolution photoelectron imaging and theoretical study of the IrB3− cluster, two isomers were observed experimentally with electron affinities (EAs) of 1.3147(8) and 1.937(4) eV. Quantum calculations revealed two nearly degenerate isomers competing for the global minimum, both with a B3 ring coordinated with the Ir atom.

Data from: σ-Aromaticity in the MoS2 Monolayer

Alexander Boldyrev & Maksim Kulichenko
As is shown using the SSAdNDP approach, Mo and S form 2-centered bonds and there is a lone pair on each S. Most importantly, the remaining electrons are distributed over Mo atoms and form conjugated aromatic σ-bonds inside every hexagonal ring, which makes molybdenum the main carrier of σ-aromaticity.

Anthropogenic and climatic factors interact to influence reproductive timing and effort

Susannah French & Geoffrey Smith
Reproduction, although absolutely essential to a species’ persistence, is in itself challenging. As anthropogenic change increasingly affects every landscape on Earth, it is critical to understand how specific pressures impact the reproductive efforts of individuals, which directly contribute to the success or failure of populations. However, organisms rarely encounter a single burden at a time, and the interactions of environmental challenges can have compounding effects. Disentangling environmental and physiological pressures is difficult because they are...

Residential Preferences Study

Arthur Kaplan & Kristopher Toff
This study reports on estimates of residential preferences in the Mountain West region of the US. The estimates are derived from a choice experiment funded by the Utah Department of Transportation and Utah Transit Authority – an experiment based on large samples of both homeowners and renters who participated in a larger, statewide transportation study. The choice experiment and transportation study provides a rich set of household- and individual-specific demographic controls, enabling us to identify...

Optimal Vehicle Trips (Cache County)

Arthur Caplan & Ramjee Acharya
This paper develops a conceptual model of optimal vehicle trips in a region plagued by weather-dependent, mobile-source air pollution, and numerically estimates optimal trips for one of the nation's perennially worst air quality regions in terms of short-term particulate matter. Based upon data-driven parameters and damage estimates, our numerical model generates steady-state values for region-wide vehicle trips and associated PM2.5 concentrations along with their corresponding optimal time paths. Our dataset includes a host of pertinent...

Preventative Capital Study (Cache County)

Arthur J. Caplan & Ramjee Acharya
We address the issue of optimal investment in “preventative capital” to mitigate episodic, mobile-source air pollution events. We calibrate Berry et al.'s (2015) endogenous-risk model using a unique dataset related to "red air day" episodes occurring in Northern Utah over the past decade. Our analysis demonstrates that, under a wide range of circumstances, the optimal steady-state level of preventative capital stock – raised through the issuance of a municipal “clean air bond” that funds more...

Refined climate downscaling for the Intermountain West

Robert R. Gillies, Rong Li, Shih-Yu Wang & Jiming Jin
Large biases associated with climate projections are problematic when it comes to their regional application in the assessment of water resources and ecosystems. We produced a set of regional climate projections that have the systematic biases reduced. The dataset first utilized a statistical regression technique and a global reanalysis dataset to correct biases in the globally-simulated variables that are subsequently used to drive the regional model. The bias-corrected global simulation data led to a more...

Sweeping Langmuir Probe (SLP) of the STORMs Sounding Rocket Mission

Padmashri Suresh & Charles Swenson
On October 30, 2007 NASA launched rocket 36.218 carrying the mission: “Investigation of Mid Latitude Ionospheric Irregularities Associated with Terrestrial Weather Systems” also known as the STORMS Mission. The rocket was launched from Wallops Island, Virginia (37.95◦ N, 284.53◦ E, 67.5◦ dip angle) at twelve minutes past local midnight. It flew along an azimuth of 114◦ and reached apogee near 394 km. The rocket payload had a suite of instruments from Utah State University/Space Dynamic...

Aircraft Input Files for Pylot and MachUpX

Jaden Thurgood
This data was used in an attempt at system identification for rudderless aircraft using simulation.

Data from: Polar Topside Ionosphere During Geomagnetic Storms: Comparison of ISIS-II with TDIM

Jan J. Sojka, Dan Rice, Michael David, Robert W. Schunk, Robert Benson & H. G. James
Output files from runs of the TDIM ionospheric model used for calculations and electron density profiles from ISIS-II and TDIM used in figures in the article in Radio Science.

Supplementary files for \"Creating a Universal Depth-To-Load Conversion Technique for the Conterminous United States using Random Forests\"

Jesse Wheeler, Brennan Bean & Marc Maguire
As part of an ongoing effort to update the ground snow load maps in the United States, this paper presents an investigation into snow densities for the purpose of predicting ground snow loads for structural engineering design with ASCE 7. Despite their importance, direct measurements of snow load are sparse when compared to measurements of snow depth. As a result, it is often necessary to estimate snow load using snow depth and other readily accessible...

Na lidar and MIGHTI/ICON investigation on turbopause tidal waves

Tao Yuan, Michael H. Stevens, Cristoph R. Englert & Thomas J. Immel
Local full diurnal coverage of temperature variations across the turbopause (~ 90 km to 115 km altitude) is achieved by combining the nocturnal observations of a Sodium (Na) Doppler lidar on the Utah State University (USU) campus (41.7?N, 248.2?E) and NASA MIGHTI/ICON daytime observations made in the same vicinity. In this paper, utilizing this hybrid dataset during summer 2020 between June 12th and July 15th, we retrieve the temperature signatures of diurnal and semidiurnal tidal...

Data from: Target Sequence Capture of Nuclear-Encoded Genes for Phylogenetic Analysis in Ferns

Paul G. Wolf, Tanner A. Robison, Matthew G. Johnson, Michael A. Sundue, Weston L. Testo & Carl J. Rothfels
Premise of the study: Until recently, most phylogenetic studies of ferns were based on chloroplast genes. Evolutionary inferences based on these data can be incomplete because the characters are from a single linkage group and are uniparentally inherited. These limitations are particularly acute in studies of hybridization, which is prevalent in ferns; fern hybrids are common and ferns are able to hybridize across highly diverged lineages, up to 60 million years since divergence in one...

Data from \"Admixture, evolution, and variation in reproductive isolation in the Boechera puberula clade\"

Martin Peter Schilling, Zachariah Gompert, Fay-Wei Li, Michael D. Windham & Paul G. Wolf
- .fastq files (Raw data from 79 individuals) - zipped - *.vcf file (variant call files) - *.gl (genotype likelihoods file) - k8admixProps.csv (admixture proportions) - k8gprob_mngt.txt (mean genotypes estimated by entropy) - All scripts for analysis can be found at Github repository. https://github.com/schimar/hts_tools

Data from: Benchmark Experiments for Natural Convection in Nuclear Fuel Rod Bundles

Kyle L. Jones & Barton L. Smith
Natural convection is a phenomenon in which a flow of the fluid surrounding a body is induced by a change in density due to the temperature difference between the body and the fluid. This flow can be highly non-linear and turbulent, generating eddies. The complex interaction between the convective, viscous and buoyant forces requires the use of modern turbulent simulation tools for simulation. The accuracy of these tools, due to non-linearity, is difficult to assess....

Optical Gas Imaging Survey of Oil and Gas Wells in the Uinta Basin, Utah

Seth Lyman, Tran Trang & Marc L Mansfield
This is a dataset of oil and gas well pads which were surveyed for hydrocarbon emissions with an optical gas imaging camera deployed from the ground at pad edges. The data are described thoroughly in a peer-reviewed paper: Lyman S., Tran, T., Mansfield, M. Ravikumar, A., 2019. Aerial and Ground-Based Optical Gas Imaging Survey of Uinta Basin Oil and Gas Wells. These are example videos collected during a hydrocarbon emissions survey of oil and gas...

Isotope Summary Data

Andrew Kulmatiski
Data includes deuterium tracer uptake data from plant species at the US Sheep Experiment Station.

Plant-soil Feedbacks Help Explain Plant Community Productivity

Andrew Kulmatiski, Jeanette Norton, Leslie Forero & Josephine Grenzer

Data from: Increased soil temperature and decreased precipitation during early life stages constrain grass seedling recruitment in cold desert restoration

Jeremy J. James, Roger Sheley, Elizabeth Leger, Peter B. Adler, Stuart Hardegree, Elise Gornish & Matt Rinella
1. Seed-based restoration is one of the most difficult challenges for dryland restoration. Identifying environmental conditions that drive variation in seed and seedling mortality across similar restoration efforts could increase understanding of when and where restoration outcomes are likely to be favorable and identify new tools and strategies to improve outcomes. 2. We asked how variation in a suite of environmental predictors influenced germination, emergence, seedling establishment, and juvenile survival of four commonly sown perennial...

Thistle-down velvet ants in the Desert Mimicry Ring and the evolution of white coloration: Müllerian mimicry, camouflage, and thermal ecology

Joseph Wilson, Jeni Sidwell, Matthew Forister, Kevin Williams & James Pitts
Adaptive coloration among animals is one of the most recognizable outcomes of natural selection. Here we investigate evolutionary drivers of white coloration in velvet ants (Hymenoptera: Mutillidae), which has previously been considered camouflage with the fruit of creosote bush. Our analyses indicate instead that velvet ants evolved white coloration millions of years before creosote bush was widespread in North America’s hot deserts. Furthermore, velvet ants and the creosote fruit exhibit different spectral reflectance patterns, which...

Data from: Density-dependent space use affects interpretation of camera trap detection rates

Kate Broadley, Cole Burton, Stan Boutin & Tal Avgar
Camera-traps (CTs) are an increasingly popular tool for wildlife survey and monitoring. Estimating relative abundance in unmarked species is often done using detection rate as an index of relative abundance, which assumes a positive linear relationship with true abundance. This assumption may be violated if movement behavior varies with density, but the degree to which movement is density-dependent across taxa is unclear. The potential confounding of population-level relative abundance indices by movement depends on how...

Scale-dependent species-area relationship: niche-based versus stochastic processes in a typical subtropical forest

Haibao Ren, Jens-Christian Svenning, Xiangcheng Mi, James A. Lutz, Jinxing Zhou & Keping Ma
Determining the patterns and drivers of the small-scale species-area relationship (SAR) is crucial for improving our understanding of community assembly and biodiversity patterns. Niche-based and stochastic processes are two principal categories of mechanisms potentially driving SARs. However, their relative importance has rarely been quantified rigorously owing to scale-dependence and the simplified niche volumes often used. In a fully mapped, 24-ha plot of a typical subtropical forest, we built the SARs and well-defined niche-hyper-volumes of a...

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