Digital Commons Network^™

Nonlinearities And Carrier Dynamics In Refractory Plasmonic Tin Thin Films, Heather George, Jennifer Reed, Manuel R. Ferdinandus, Clayton Devault, Alexei Lagutchev, Augustine Urbas, Theodore B. Norris, Vladimir M. Shalaev, Alexandra Boltasseva, Nathaniel Kinsey

Faculty Publications

Titanium nitride is widely used in plasmonic applications, due to its robustness and optical properties which resemble those of gold. Despite this interest, the nonlinear properties have only recently begun to be investigated. In this work, beam deflection and non-degenerate femtosecond pump-probe spectroscopy (800 nm pump and 650 nm probe) were used to measure the real and imaginary transient nonlinear response of 30-nm-thick TiN films on sapphire and fused silica in the metallic region governed by Fermi-smearing nonlinearities. In contrast to other metals, it is found that TiN exhibits non-instantaneous positive refraction and reverse saturable absorption whose relaxation is dominated …

Insulation Sensitivity Analysis For An Optimized Fabric Shelter Off-Grid Hybrid Energy System, Jay F. Pearson, Torrey J. Wagner, Steven Schuldt

Faculty Publications

During military and disaster relief operations, connecting to an established electrical grid is rarely an option. In these situations, camps consisting of poorly insulated fabric shelters are predominantly powered by inefficient diesel generators that require frequent fuel resupply. In order to reduce the fuel demand of these generators, camps may utilize photovoltaic-battery systems. This paper presents an innovative cost-performance model capable of optimizing solar array size, battery backup system, and shelter insulation type to minimize the operating cost of powering a single fabric shelter. Model performance was evaluated using one year of insolation, weather and energy requirement data from a …

A Tax On The Clones: The Strange Case Of Bitcoin Cash, Eric D. Chason

Faculty Publications

No abstract provided.

Out Of The Quandary: Personal Jurisdiction Over Absent Class Member Claims Explained, A. Benjamin Spencer

Faculty Publications

Since the Supreme Court's decision in Bristol-Myers Squibb Co. v. Superior Court of California, San Francisco County, litigants and lower courts have wrestled with the issue of whether a federal court must be able to exercise personal jurisdiction with respect to each of the claims asserted by absent class members in a class action and, if so, what standard governs that jurisdictional determination. This issue is rapidly coming to a head and is poised for inevitable resolution by the Supreme Court in the near future; multiple circuit courts have heard appeals from district courts that have reached varying conclusions on …

Rheological Properties Of Asphalt Binder Modified With Recycled Asphalt Materials And Light-Activated Self-Healing Polymers, Sharareh Shirzad, Marwa M. Hassan, Max A. Aguirre, Louay N. Mohammad, Samuel Cooper, Ioan I. Negulescu

Faculty Publications

Ultraviolet (UV), light-activated, self-healing polymers are an emerging technology that was proposed to enhance the elastic behavior of asphalt binder, while improving its self-healing properties. The objective of this study was to evaluate the effects of self-healing polymer on the rheological properties of binder blends prepared with or without recycled asphalt materials. Binder blends were prepared with two different binders (PG 67-22 and PG 70-22M), with or without recycled asphalt materials, and 5% self-healing polymer (Oxetane-substituted Chitosan-Polyurethane). High-Pressure Gel Permeation Chromatography (HP-GPC) results showed an increase in High Molecular Weight (HMW) components in the binder with an increase in stiffness …

Search For Intermediate Mass Black Hole Binaries In The First And Second Observing Runs Of The Advanced Ligo And Virgo Network, B. P. Abbott, R. Abbott, T. D. Abbott, S. Abraham, F. Acernese, K. Ackley, A. Adams, C. Adams, R. X. Adhikari, V. B. Adya, C. Affeldt, M. Agathos, K. Agatsuma, N. Aggarwal, O. D. Aguiar, L. Aiello, A. Ain, P. Ajith, G. Allen, A. Allocca, M. A. Aloy, P. A. Altin, A. Amato, S. Anand, A. Ananyeva, S. B. Anderson, W. G. Anderson, S. V. Angelova, S. Antier, S. Appert, K. Arai, M. C. Araya, J. S. Areeda

Faculty Publications

Gravitational-wave astronomy has been firmly established with the detection of gravitational waves from the merger of ten stellar-mass binary black holes and a neutron star binary. This paper reports on the all-sky search for gravitational waves from intermediate mass black hole binaries in the first and second observing runs of the Advanced LIGO and Virgo network. The search uses three independent algorithms: two based on matched filtering of the data with waveform templates of gravitational-wave signals from compact binaries, and a third, model-independent algorithm that employs no signal model for the incoming signal. No intermediate mass black hole binary event …

Microrna-92a Regulates The Expression Of Aphid Bacteriocyte-Specific Secreted Protein 1, Honglin Feng, Joun S. Park, R. Grace Zhai, Alexandra C.C. Wilson

Faculty Publications

Objective: Aphids harbor a nutritional obligate endosymbiont in specialized cells called bacteriocytes, which aggregate to form an organ known as the bacteriome. Aphid bacteriomes display distinct gene expression profiles that facilitate the symbiotic relationship. Currently, the mechanisms that regulate these patterns of gene expression are unknown. Recently using computational pipelines, we identified miRNAs that are conserved in expression in the bacteriomes of two aphid species and proposed that they function as important regulators of bacteriocyte gene expression. Here using a dual luciferase assay in mouse NIH/3T3 cell culture, we aimed to experimentally validate the computationally predicted interaction between Myzus persicae …

Flat-Band Magnetism And Helical Magnetic Order In Ni-Doped Srco2as2, Yu Li, Zhonghao Liu, Zhuang Xu, Yu Song, Yaobo Huang, Dawei Shen, Ni Ma, Ang Li, Songxue Chi, Matthias Frontzek, Huibo Cao, Qingzhen Huang, Weiyi Wang, Yaofeng Xie, Rui Zhang, Yan Rong, William A. Shelton, David P. Young, J. F. Ditusa, Pengcheng Dai

Faculty Publications

A series of Sr(Co1-xNix)2As2 single crystals was synthesized, allowing a comprehensive phase diagram with respect to field, temperature, and chemical substitution to be established. Our neutron diffraction experiments revealed a helimagnetic order with magnetic moments ferromagnetically aligned in the ab plane and a helimagnetic wave vector of q=(0,0,0.56) for x=0.1. The combination of neutron diffraction and angle-resolved photoemission spectroscopy measurements shows that the tuning of a flat band with dx2-y2 orbital character drives the helimagnetism and indicates the possibility of a quantum order-by-disorder mechanism.

Search For Eccentric Binary Black Hole Mergers With Advanced Ligo And Advanced Virgo During Their First And Second Observing Runs, Tiffany Summerscales, Ligo Scientific Collaboration And The Virgo Collaboration

Faculty Publications

When formed through dynamical interactions, stellar-mass binary black holes (BBHs) may retain eccentric orbits (e > 0.1 at 10 Hz) detectable by ground-based gravitational-wave detectors. Eccentricity can therefore be used to differentiate dynamically formed binaries from isolated BBH mergers. Current template-based gravitational-wave searches do not use waveform models associated with eccentric orbits, rendering the search less efficient for eccentric binary systems. Here we present the results of a search for BBH mergers that inspiral in eccentric orbits using data from the first and second observing runs (O1 and O2) of Advanced LIGO and Advanced Virgo. We carried out the search …

Search For Intermediate Mass Black Hole Binaries In The First And Second Observing Runs Of The Advanced Ligo And Virgo Network, Tiffany Summerscales, Ligo Scientific Collaboration And The Virgo Collaboration

Faculty Publications

Gravitational-wave astronomy has been firmly established with the detection of gravitational waves from the merger of ten stellar-mass binary black holes and a neutron star binary. This paper reports on the all-sky search for gravitational waves from intermediate mass black hole binaries in the first and second observing runs of the Advanced LIGO and Virgo network. The search uses three independent algorithms: two based on matched filtering of the data with waveform templates of gravitational-wave signals from compact binaries, and a third, model-independent algorithm that employs no signal model for the incoming signal. No intermediate mass black hole binary event …

Shelf Inputs And Lateral Transport Of Mn, Co, And Ce In The Western North Pacific Ocean, Peter L. Morton, William M. Landing, Alan M. Shiller, Thomas D. Kelly, Michael Bizimis, John R. Donat, Eric H. De Carlo, Joseph Shacat

Faculty Publications

The margin of the western North Pacific Ocean releases redox-active elements like Mn, Co, and Ce into the water column to undergo further transformation through oxide formation, scavenging, and reductive dissolution. Near the margin, the upper ocean waters enriched in these elements are characterized by high dissolved oxygen, low salinity, and low temperature, and are a source of the North Pacific Intermediate Water. High dissolved concentrations are observed across the Western Subarctic Gyre, with a rapid decrease in concentrations away from the margin and across the subarctic-subtropical front. The particulate concentrations of Mn, Co, and Ce are also high in …

The Household Water Insecurity Experiences (Hwise) Scale: Development And Validation Of A Household Water Insecurity Measure For Low-Income And Middle-Income Countries, Sera L. Young, Godfred O. Boateng, Zeina Jamaluddine, Joshua D. Miller, Edward A. Frongillo, Torsten B. Neilands, Shaleans M. Collins, Amber Wutich, Wendy E. Jepson, Justin Stoler

Faculty Publications

Objective Progress towards equitable and sufficient water has primarily been measured by population-level data on water availability. However, higher-resolution measures of water accessibility, adequacy, reliability and safety (ie, water insecurity) are needed to understand how problems with water impact health and well-being. Therefore, we developed the Household Water InSecurity Experiences (HWISE) Scale to measure household water insecurity in an equivalent way across disparate cultural and ecological settings.

Methods Cross-sectional surveys were implemented in 8127 households across 28 sites in 23 low-income and middle-income countries. Data collected included 34 items on water insecurity in the prior month; socio-demographics; water acquisition, use …

The Household Water Insecurity Experiences (Hwise) Scale: Development And Validation Of A Household Water Insecurity Measure For Low-Income And Middle-Income Countries, Sera L. Young, Godfred O. Boateng, Zeina Jamaluddine, Joshua D. Miller, Edward A. Frongillo Jr., Torsten B. Neilands, Shelean M. Collins, Amber Wutich, Wendy E. Jepson, Justin Stoler, On Behalf Of The Hwise Research Coordination Network

Faculty Publications

Objective

Progress towards equitable and sufficient water has primarily been measured by population-level data on water availability. However, higher-resolution measures of water accessibility, adequacy, reliability and safety (ie, water insecurity) are needed to understand how problems with water impact health and well-being. Therefore, we developed the Household Water InSecurity Experiences (HWISE) Scale to measure household water insecurity in an equivalent way across disparate cultural and ecological settings.

Methods

Cross-sectional surveys were implemented in 8127 households across 28 sites in 23 low-income and middle-income countries. Data collected included 34 items on water insecurity in the prior month; sociodemographics; water acquisition, use …

Life Lessons With Atreus And Chloe: Mature Video Games As Opportunity Spaces For Family Conversations, Angela Vanden Elzen, Adam L. Vanden Elzen

Faculty Publications

The effects of childhood and adolescent exposure to mature video games has been a recurring topic in popular culture as well as academic research for many years. While many studies have been conducted, a consensus has not been reached. Video games have been shown,however,to play a positive role in family togetherness and act as an opportunity space to encourage family discussion. Through a review of the literature, this article argues that mature video games can serve as opportunity spaces for families with older children and teens. A case study in which the M-rated video games,Life is Strange: Before the Storm …

Innovative Information Literacy Landscapes: Leveraging The Specialized Knowledge Of Lgbtq+ Communities In Research And Practice, Vanessa Kitzie

Faculty Publications

This paper examines how Knowledge School principles can help libraries develop a more nuanced understanding of how social and cultural differences shape knowledge production and dissimi-nation within LGBTQ+ communities. I focus on information literacy (IL), in which practitioners teach individuals to seek, evaluate, and use information. IL can empower communities by enhancing education, confidence, and decision-making. However, libraries often approach IL from a deficit, skills-based perspective by envisioning communities as lacking the requisite knowledge to fulfill their information needs. As a Knowledge School, we need to move away from one-size-fits-all approaches to librarianship. Through research, we can understand how communities …

Measurement Of The Muon Neutrino Charged-Current Cross Sections On Water, Hydrocarbon And Iron, And Their Ratios, With The T2k On-Axis Detectors, K. Abe, R. Akutsu, A. Ali, C. Andreopoulos, L. Anthony, M. Antonova, S. Aoki, A. Ariga, Y. Ashida, Y. Awataguchi, Y. Azuma, S. Ban, M. Barbi, G. J. Barker, G. Barr, C. Barry, M. Batkiewicz-Kwasniak, F. Bench, V. Berardi, S. Berkman, R. M. Berner, L. Berns, S. Bhadra, S. Bienstock, A. Blondel, S. Bolognesi, B. Bourguille, S. B. Boyd

Faculty Publications

We report a measurement of the flux-integrated νμ charged-current cross sections on water, hydrocarbon, and iron in the T2K on-axis neutrino beam with a mean neutrino energy of 1.5 GeV. The measured cross sections on water, hydrocarbon, and iron are σH2oCC = (0.840±0.010(stat.)+0.10-0.08(syst.)) ×10-38 cm2/nucleon, σCHCC = (0.817±0.007(stat.)+0.11-0.08(syst.)) × 10-38 cm2/nucleon, and σFeCC = (0.859±0.003(stat.)^+0.12-0.10(syst.)) ×10-38 cm2/nucleon, respectively, for a restricted phase space of induced muons: θμ < 45° and pμ > 0.4 GeV/c in the laboratory frame. The measured cross section ratios are σH2oCC/σCHCC = 1.028±0.016(stat.)±0.053(syst.), σFeCC/σH2oCC = 1.023±0.012(stat.)±0.058(syst.), and σFeCC/σCHCC = 1.049±0.010(stat.)±0.043(syst.). These results, with an unprecedented precision for the measurements of neutrino …

Interrogating How Information (Re)Produces Systemic Barriers Within Lgbtq+ Communities To Inform Global Lis Education, Vanessa Kitzie, Travis L. Wagner, Nick Vera, Valerie Lookingbill

Faculty Publications

This preliminary research examines the health information practices of South Carolina LGBTQ+ communities. Findings have the following implications for LIS education at a global level: building cultural competency regarding the role of information in marginalizing certain populations, and training students to engage in user outreach and advocacy. These implications address a global need for LIS education to encompass social responsibility and inclusion into program curricula.

Positive Youth Religious And Spiritual Development: What We Have Learned From Religious Families, David C. Dollahite, Loren D. Marks

Faculty Publications

In this article, we highlight the contributions of the findings from a branch of the American Families of Faith national research project that pertain to positive religious and spiritual development in youth. We present detailed findings from six previous studies on religious youth and their parents from diverse faith communities (various denominations in Christianity, three major branches of Judaism, and two major groups in Islam). We discuss what our findings suggest for positive religious/spiritual development, particularly in a family context. Finally, we suggest several ways to strengthen the literature on development in youth by exploring positive religious/spiritual development in relation …

Particle Decay Of Astrophysically-Important 19Ne Levels, D. W. Bardayan, K. A. Chipps, S. Ahn, J. C. Blackmon, U. Greife, K. L. Jones, A. Kontos, R. L. Kozub, L. Linhardt, B. Manning, M. Matos, P. D. O'Malley, S. Ota, S. D. Pain, W. A. Peters, S. T. Pittman, A. Sachs, K. T. Schmitt, M. S. Smith, P. Thompson

Faculty Publications

The 15O(α,γ)19Ne reaction is an important trigger reaction leading to the rapid proton (rp) capture process in X-ray bursts. The primary uncertainty in determining its astrophysical rate is the uncertain α branching ratios of levels near Ex = 4.1 MeV in 19Ne. These states have been populated in a study of the 20Ne(p, d)19Ne reaction, and α branching ratios are reported in this manuscript.

Effect Of Bark Application With Beauveria Bassiana And Permethrin Insecticide On The Walnut Twig Beetle (Coleoptera: Curculionidae) In Black Walnut Bolts, Albert E. Mayfield, Jennifer Juzwik, Jamison Scholer, John D. Vandenberg, Adam Taylor, Timothy Schowalter

Faculty Publications

Formulations of entomopathogenic (insect-killing) fungi represent alternatives to synthetic insecticides in the management of forest and shade tree insects. We evaluated bark spray applications of the entomopathogen Beauveria bassiana (Balsamo) Vuillemin (Hypocreales: Cordycipitaceae) strain GHA (BotaniGardES), permethrin insecticide (Astro), and water (control) on colonization of black walnut (Juglans nigra L.) (Fagales: Juglandaceae) bolts by the walnut twig beetle (Pityophthorus juglandis Blackman) (Coleoptera: Curculionidae), vector of the fungus that causes thousand cankers disease. Treated bolts were baited with a P. juglandis aggregation pheromone lure and deployed in infested walnut trees. Bark application of permethrin prevented P. juglandis colonization of the phloem. …

Modeling Agrilus Planipennis F. (Coleoptera: Buprestidae) Spread In New Jersey, Erik Lyttek, Pankaj Lal, Garrett Nieddu, Eric Forgoston, Taylor Wieczerak, Timothy Schowalter

Faculty Publications

Pests and disease have become an increasingly common issue as globalized trade brings non-native species into unfamiliar systems. Emerald ash borer (Agrilus planipennis), is an Asiatic species of boring beetle currently devastating the native population of ash (Fraxinus) trees in the northern forests of the United States, with 85 million trees having already succumbed across much of the Midwest. We have developed a reaction-diffusion partial differential equation model to predict the spread of emerald ash borer over a heterogeneous 2-D landscape, with the initial ash tree distribution given by data from the Forest Inventory and Analysis. As expected, the model …

The Role Of Minor Pheromone Components In Segregating 14 Species Of Longhorned Beetles (Coleoptera: Cerambycidae) Of The Subfamily Cerambycinae, Lawrence M. Hanks, Judith A. Mongold-Diers, Robert F. Mitchell, Yunfan Zou, Joseph C.H. Wong, Linnea R. Meier, Todd D. Johnson, Jocelyn G. Millar, Brian Sullivan

Faculty Publications

We present research on the chemical ecology of 14 species of longhorned beetles (Coleoptera: Cerambycidae), in four tribes of the subfamily Cerambycinae, conducted in east-central Illinois over 8 yr. Adult males produce aggregation-sex pheromones that attract both sexes. Twenty independent field bioassays explored the pheromone chemistry of the species and tested the possible attractive or antagonistic effects of compounds that are not produced by a given species, but are pheromone components of other species. Analyses of beetle-produced volatiles revealed compounds that had not been reported previously from several of the species. The most common pheromone component was (R)-3-hydroxyhexan-2-one, but pheromones …

Generating Electromagnetic Schell-Model Sources Using Complex Screens With Spatially Varying Auto- And Cross-Correlation Functions, Milo W. Hyde Iv

Faculty Publications

We present a method to generate any physically realizable electromagnetic Schell-model source. Our technique can be directly implemented on existing vector-beam generators that utilize spatial light modulators for coherence control, beam shaping, and relative phasing. This work significantly extends published research on the subject, where control over the partially coherent source’s cross-spectral density matrix was limited. We begin by presenting the statistical optics theory necessary to derive and implement our method. We then apply our technique, both analytically and in simulation, to produce two electromagnetic Schell-model sources from the literature. We demonstrate control over the full cross-spectral density matrices of …

Optical Response Of Bifeo3 Films Subjected To Uniaxial Strain, Andrew Herklotz, Stefania Rus, Changhee Sohn, Santosh Kc, Valentino Cooper, Er-Jia Guo, Thomas Ward

Faculty Publications

The impact of single-axis lattice expansion on the optical response of BiFeO3 films is examined. Low-energy He implantation is used to tailor morphotropic phases of BiFeO3 films and study changes in their optical spectra with continuously increasing lattice expansion. He ion implantation of epitaxial rhombohedral (R)- and tetragonal (T)-like BiFeO3 films induces uniaxial out-of-plane strain that, on R-like films, eventually leads to a complete R-T phase transition. This approach allows us to provide insights into the optical response of BiFeO3 films. Strain doping of T-like films leads to a significant redshift of the optical absorption spectra that is theoretically explained …

Adhesion Testing Of Printed Inks While Varying The Surface Treatment Of Polymer Substrates, Clayton Neff, Edwin Elston, Amanda Schrand, Nathan B. Crane

Faculty Publications

Additive manufacturing with conductive materials enables new approaches to printed electronics that are unachievable by standard electronics manufacturing processes. In particular, electronics can be embedded directly into structural components in nearly arbitrary 3D space. While these methods incorporate many of the same materials, the new processing methods require standard test methods to compare materials, processing conditions, and determine design limits. This work demonstrates a test method to quantitatively measure the adhesion failure of printed inks deposited on a substrate without changing the ink printing conditions. The proposed method is an adaption of single lap shear testing in which the lap …

Constraints And Negotiations To Student Recreational Sport Center Usage, Samantha L. Powers, Nate E. Trauntvein, Robert J. Barcelona, Cindy L. Hartman

Faculty Publications

Studies have shown that student recreational sports centers offer a variety of benefits to emerging adult students. Previous research has identified the presence of constraints to physical activity and student recreational sports center (SRSC) usage (Flood & Parker, 2014; Stankowski, Trauntvein, & Hall, 2017; Young, Ross, & Barcelona, 2003). However, little research has examined the negotiation strategies which students use to increase their physical activity levels through use of the SRSC. This study focused on the constraints and negotiation strategies which affected both users and infrequent users of the SRSC at a mid-size, public university in the northeastern United States. …

Modeling Energy Dynamics With The Energy-Interaction Diagram, Benedikt Harrer, Cassandra Paul

Faculty Publications

Energy is an important crosscutting concept in all science disciplines, and energy conservation is widely regarded as one of the most important principles in physics.1–3 Over the years, numerous graphical representations have been proposed that allow learners of physics to visualize energy states and dynamics in a particular situation.3–7 Each diagram highlights different aspects of energy and therefore may represent different conceptualizations of energy. Bar charts,8 for example, foreground the idea of multiple categories of energy to account for the distribution of energy in a system across those energy types. Similarly, pie charts5 highlight relative distribution …

Penicillin Allergy Assessment And Skin Testing In The Outpatient Setting, Wesley D. Kufel, Julie Ann Justo, P. Brandon Bookstaver, Lisa M. Avery

Faculty Publications

Penicillin allergies are among of the most commonly reported allergies, yet only 10% of these patients are truly allergic. This leads to potential inadvertent negative consequences for patients and makes treatment decisions challenging for clinicians. Thus, allergy assessment and penicillin skin testing (PST) are important management strategies to reconcile and clarify labeled penicillin allergies. While PST is more common in the inpatient setting where the results will immediately impact antibiotic management, this process is becoming of increasing importance in the outpatient setting. PST in the outpatient setting allows clinicians to proactively de-label and educate patients accordingly so beta-lactam antibiotics may …

A Method For Automatic Detection Of Tongued And Slurred Note Transitions In Clarinet Playing, Whitney L. Coyle, Jack D. Gabriel

Faculty Publications

This study offers a simple method to characterize two transition types in passages of music in order to automatically distinguish slurred transitions from tongued transitions in musical settings. Data were recorded from musicians playing a clarinet with a sensor-equipped mouthpiece measuring blowing pressure in the mouth and pressure in the mouthpiece. This method allows for comparing transitions in different musical contexts, playing regimes, and between players. The method is highly reliable in automatically detecting transition types in recorded clarinet playing in both simple and more complex passages.

Method For Approximating Field-Line Curves Using Ionospheric Observations Of Energy-Variable Electron Beams Launched From Satellites, Jake M. Willard, Jay R. Johnson, Jesse M. Snelling, Andrew T. Powis, Igor D, Kaganovich, Ennio R. Sanchez

Faculty Publications

Using electron beam accelerators attached to satellites in Earth orbit, it may be possible to measure arc length and curvature of field-lines in the inner magnetosphere if the accelerator is designed with the capability to vary the beam energy. In combination with additional information, these measurements would be very useful in modeling the magnetic field of the inner magnetosphere. For this purpose, a three step data assimilation modeling approach is discussed. The first step in the procedure would be to use prior information to obtain an initial forecast of the inner magnetosphere. Then, a family of curves would be defined …