Digital Commons Network^™

Multipoint Observations Of Compressional Pc5 Pulsations In The Dayside Magnetosphere And Corresponding Particle Signatures, Galina Korotova, David Sibeck, Mark Engebretson, Michael Balikhin, Scott Thaller, Craig Kletzing, Harlan Spence, Robert Redmon

Faculty Authored Articles

We use Van Allen Probes (Radiation Belt Storm Probes A and B, henceforth RBSP-A and RBSP-B) and GOES-13 and GOES-15 (henceforth G-13 and G-15) multipoint magnetic field, electric field, plasma, and energetic particle observations to study the spatial, temporal, and spectral characteristics of compressional Pc5 pulsations observed during the recovery phase of a strong geomagnetic storm on 1 January 2016. From ∼ 19:00 to 23:02 UT, successive magnetospheric compressions enhanced the peak-to-peak amplitudes of Pc5 waves with 4.5'6.0 mHz frequencies from 0' 2 to 10'15 nT at both RBSP-A and RBSP-B, particularly in the prenoon magnetosphere. Poloidal Pc4 pulsations with …

Spatial Fingerprint Of Younger Dryas Cooling And Warming In Eastern North America, David Fastovich, James M. Russell, Stephen T. Jackson, Teresa R. Krause, Shaun A. Marcott, John W. Williams

Faculty Authored Articles

The Younger Dryas (YD, 12.9–11.7 ka) is the most recent, near‐global interval of abrupt climate change with rates similar to modern global warming. Understanding the causes and biodiversity effects of YD climate changes requires determining the spatial fingerprints of past temperature changes. Here we build pollen‐based and branched glycerol dialkyl glycerol tetraether‐based temperature reconstructions in eastern North America (ENA) to better understand deglacial temperature evolution. YD cooling was pronounced in the northeastern United States and muted in the north central United States. Florida sites warmed during the YD, while other southeastern sites maintained a relatively stable climate. This fingerprint is …

Nanoscale Battery Cathode Materials Induce Dna Damage In Bacteria, Tian A. Qiu, Valeria Guidolin, Khoi Nguyen L. Hoang, Thomas Pho, Andrea Carra, Peter W. Villalta, Jiayi He, Xiaoxiao Yao, Robert J. Hamers, Silvia Balbo, Z Vivian Feng, Christy L. Haynes

Faculty Authored Articles

The increasing use of nanoscale lithium nickel manganese cobalt oxide (LixNiyMnzCo1−y−zO2, NMC) as a cathode material in lithium-ion batteries poses risk to the environment. Learning toxicity mechanisms on molecular levels is critical to promote proactive risk assessment of these complex nanomaterials and inform their sustainable development. We focused on DNA damage as a toxicity mechanism and profiled in depth chemical and biological changes linked to DNA damage in two environmentally relevant bacteria upon nano-NMC exposure. DNA damage occurred in both bacteria, characterized by double-strand breakage and increased levels of many putative chemical modifications on bacterial DNA bases related to direct …

Emic Waves In The Earth's Inner Magnetosphere As A Function Of Solar Wind Structures During Solar Maximum, Konstantin V. Gamayunov, Mark J. Engebretson, Scot R. Elkington

Faculty Authored Articles

Here we analyze the statistics of electromagnetic ion cyclotron (EMIC) waves observed in the Earth's inner magnetosphere during coronal mass ejection (CME), high-speed stream (HSS), and quiet solar wind (QSW) conditions in the upstream solar wind (SW). For our analysis we use the EMIC wave observations by the two Van Allen Probes during their first magnetic local time (MLT) revolution. The major results of our analysis are as follows: (1) Criteria to identify the HSS, CME, and QSW conditions in the SW are formulated. (2) 54%, 36%, and 10% of EMIC wave events are observed during CME, HSS, and QSW, …

Interhemispheric Comparisons Of Large Nighttime Magnetic Perturbation Events Relevant To Gics, Mark J. Engebretson, Kathryn R. Kirkevold, Erik S. Steinmetz, Viacheslav A. Pilipenko, Mark B. Moldwin, Brett A. Mccuen, C R. Clauer, Michael D. Hartinger, Shane Coyle, Herman Opgenoorth, Audrey Schillings, Anna N. Willer, Thom R. Edwards, David H. Boteler, Andy J. Gerrard, Mervyn P. Freeman, Michael C. Rose

Faculty Authored Articles

Nearly all studies of impulsive magnetic perturbation events (MPEs) with large magnetic field variability (dB/dt) that can produce dangerous geomagnetically induced currents (GICs) have used data from the Northern Hemisphere. Here we present details of four large‐amplitude MPE events (|ΔBx| > 900 nT and |dB/dt| > 10 nT/s in at least one component) observed between 2015 and 2018 in conjugate high‐latitude regions (65–80° corrected geomagnetic latitude), using magnetometer data from (1) Pangnirtung and Iqaluit in eastern Arctic Canada and the magnetically conjugate South Pole Station in Antarctica and (2) the Greenland West Coast Chain and two magnetically conjugate chains in Antarctica, AAL‐PIP …

Arase Observation Of The Source Region Of Auroral Arcs And Diffuse Auroras In The Inner Magnetosphere, K Shiokawa, M Nosé, S Imajo, Y.-M. Tanaka, Y Miyoshe, K Hosokawa, M Connors, Mark Engebretson, Y Kazama, S.-Y. Wang, S W. Y. Tam, Tzu-Fang Chang, Bo-Jhou Wang, K Asamura, S Kasahara, S Yokota, T Hori, K Keika, Y Kasaba, M Shoji, Y Kasahara, A Matsuoka, I Shinohara

Faculty Authored Articles

Auroral arcs and diffuse auroras are common phenomena at high latitudes, though characteristics of their source plasma and fields have not been well understood. We report the first observation of fields and particles including their pitch‐angle distributions in the source region of auroral arcs and diffuse auroras, using data from the Arase satellite at L ~ 6.0–6.5. The auroral arcs appeared and expanded both poleward and equatorward at local midnight from ~0308 UT on 11 September 2018 at Nain (magnetic latitude: 66°), Canada, during the expansion phase of a substorm, while diffuse auroras covered the whole sky after 0348 UT. …

Cognitive Control Errors In Nonhuman Primates Resembling Those In Schizophrenia Reflect Opposing Effects Of Nmda Receptor Blockade On Causal Interactions Between Cells And Circuits In Prefrontal And Parietal Cortices, Erich Kummerfeld, Sisi Ma, Rachael K. Blackman, Adele L. Denicola, A. David Redish, Sophia Vinogradov, David A. Crowe, Matthew V. Chafee

Faculty Authored Articles

Background: The causal biology underlying schizophrenia is not well understood, but it is likely to involve a malfunction in how neurons adjust synaptic connections in response to patterns of activity in networks. We examined statistical dependencies between neural signals at the cell, local circuit, and distributed network levels in prefrontal and parietal cortices of monkeys performing a variant of the AX continuous performance task paradigm. We then quantified changes in the pattern of neural interactions across levels of scale following NMDA receptor (NMDAR) blockade and related these changes to a pattern of cognitive control errors closely matching the performance of …

Ecosystem Metabolism In Small Ponds: The Effects Of Floating-Leaved Macrophytes, Daniel J. Hornbach, Emily G. Schilling, Holly Kundel

Faculty Authored Articles

Small ponds constitute a significant number of standing water bodies on earth and may contribute to CO2 uptake or release into the atmosphere. Despite their importance, few studies have examined ecosystem metabolism in ponds, especially in ponds that may be dominated by floating-leaved macrophytes. In this study, we examined ecosystem metabolism by measuring changes in dissolved oxygen levels every 10 min from late May through late October for four shallow ponds (0.5–1.5 m) in east-central Minnesota, USA. Ponds had varying levels of floating-leaved macrophytes from sparse (<1% coverage) to abundant (61% coverage). We found significant dierences in a number of physical/chemical factors including P, N, DOC, water temperature and light penetration. We also found significant dierence in gross primary production (GPP—average ranged from 2.2 to 5.5 mg O2/L/day), respiration (R—average ranged from 􀀀6.8 to 􀀀3.6 mg O2/L/day) and net ecosystem production (NEP—average ranged from 􀀀1.5 to 􀀀0.1 mg O2/L/day) among the ponds. On average, all of the ponds were heterotrophic (R > GPP). While it appeared that floating-leaved macrophytes provided a significant impact on ecosystem …

Influence Of The Spatial Distribution Of Cationic Functional Groups At Nanoparticle Surfaces On Bacterial Viability And Membrane Interactions, Yongqian Zhang, Natalie V. Hudson-Smith, Seth D. Frand, Meghan S. Cahill, Larissa S. Davis, Vivian Feng, Christy L. Haynes, Robert J. Hamers

Faculty Authored Articles

While positively charged nanomaterials induce cytotoxicity in many organisms, much less is known about how the spatial distribution and presentation of molecular surface charge impact nanoparticle–biological interactions. We systematically functionalized diamond nanoparticle surfaces with five different cationic surface molecules having different molecular structures and conformations, including four small ligands and one polymer, and we then probed the molecular-level interaction between these nanoparticles and bacterial cells. Shewanella oneidensis MR-1 was used as a model bacterial cell system to investigate how the molecular length and conformation of cationic surface charges influence their interactions with the Gram-negative bacterial membranes. Nuclear magnetic resonance (NMR) …

Music And Six-Minute Walk-Distance- One Step At A Time: Commentary On “Rhythmic Auditory Stimulation Increases 6-Minute Walk Distance In Individuals With Copd: A Repeated Measures Study, Annie Heiderscheit, Sikandar Khan, Babar Khan, Linda Chlan

Faculty Authored Articles

The article by Hernandez and colleagues published in this edition of Heart & Lung, reports on original research exploring the use of rhythmic auditory stimulation (RAS) to increase the 6-minute distance walk with individuals diagnosed with chronic obstructive pulmonary disease (COPD). The authors provide clear rationale regarding the use of music to stimulate movement, increase exercise tolerance, and to distract participants from the perception of dyspnea. Through this report, we offer further insights specifically focused on the RAS process, including vital considerations when implementing a music-based intervention in clinical practice settings.

Appropriating The Comanche: Hell Or High Water And The New Southwest, Douglas E. Green

Faculty Authored Articles

Hell or High Water (2016) takes the elegiac mode – the wistful lament for the myth of the Old West – and recasts it as a raucous country song on the dismantling of that myth by twenty-first-century capitalism. In the wake of the Great Recession, director David Mackenzie and screenwriter Taylor Sheridan pair off two iconic sets of Western characters: a couple of down-and-out bank-robbing brothers shadowed by an old, White Texas Ranger and his American-Indian/Mex- ican-American deputy. The values of the lawmen and the outlaw brothers are not mutually exclusive – each pair shares more with the other than …

Settler Colonial Disease And Dis-Ease In August: Osage County, M. Elise Marubbio

Faculty Authored Articles

Tracy Letts’s screenplay, August: Osage County (2013), and John Wells’s film adaptation (2013) offer a compelling critique of American racism towards Native Americans which demands that viewers consider their own inculcation into ongoing settler-nation colonialism. The film layers the history of place (Oklahoma) with the Cheyenne character Johnna, whose Indigenous heritage is negotiated throughout by liberal academics, conservative rural matriarchs, and Johnna herself. The role is small but essential to the film’s allegorical analysis of settler-colonialism and racism. The Weston family’s secrets, addictions, and dysfunction starkly contrast with Johnna’s health and stability. Through Johnna, the film questions the toll colonialism …

Degeneration Of Settler Colonialism In Contemporary Cinematic Depictions Of The U.S. West: Introduction, M. Elise Marubbio, Marek Paryż, Matthew Carter

Faculty Authored Articles

The settler’s situation is underpinned by the fear of having been caught in a process of endless transition, hence the determination to define the parameters of collective sovereignty and to establish a satisfactory existential basis. The sense of uncertainty that underlies the settler’s situation accounts for the necessity of developing power structures that sustain the settler collective’s striving to complete its design, and this triggers a range of conflicts. Repeatedly addressing the eponymous region’s legacy of settler colonialism, film depictions of the American West re-inscribe oppression of racial minorities, sexual abuse, and class exploitation in order to validate the foundational …

Kissing Frogs: The Challenges Of Becoming A Successful Entrepreneur, George Dierberger, Marc Isaacson, Cory Erickson, Thomas P. Dierberger

Faculty Authored Articles

“Kissing Frogs: The challenges of becoming a successful entrepreneur” explores the difficulties of creating, sustaining and succeeding as a business owner. This research is supplemented with data from a national survey to entrepreneurs (355) through Qualtrics, a global research organization. The respondents represented 42 states from a diverse group of self-identified entrepreneurs from a variety of industries.

To summarize, the paper will analyze the following topics in detail:

1. The importance of the mission and vision for the organization
2. The motivation for starting the business
3. The inspiration for the business idea
4. The importance of perseverance

A Systematic Review Of Scientific Studies On The Effects Of Music In People With Or At-Risk For Eating Disorders, Francesca Testa, Sarah Arunachalam, Annie Heiderscheit, Hubertus Himmerich

Faculty Authored Articles

Background:The prevalence of the three main eating disorders (EDs) anorexia nervosa (AN), bulimia nervosa (BN) and binge eating disorder (BED) is increasing, and a growing number of patients with EDs is seeking professional help. Thus, there is a need for additional treatment strategies in EDs. The aim of this review was to summarize the literature on the benefits and risks of music as well as the evidence for its therapeutic application in people with EDs.

Methods: Following the PRISMA guidelines, we performed a systematic literature review on scientific studies on the effect of music in people with or at risk …

Interprofessional Research In Guided Imagery And Music: Working Collaboratively, Alison E. Short, Annie Heiderscheit

Faculty Authored Articles

Interprofessional collaborative research has been gaining momentum as a leading research practice. The challenges posed by the complex nature of the world and healthcare require new and different solutions. These require the diverse skill and collective work of multiple disciplines. As a result, funding agencies are giving priority to interprofessional collaborative research rather than single discipline research. This article focuses on one method of music therapy practice: The Bonny Method of Guided Imagery and Music (GIM), where practitioners typically work alone. It reviews interprofessional collaboration in current GIM research literature and explores how GIM can benefit from this type of …

Swiping More, Committing Less: Unraveling The Links Among Dating App Use, Dating App Success, And Intention To Commit Infidelity, Cassandra Alexopoulos, Elisabeth Timmermans, Jenna Mcnallie

Faculty Authored Articles

The present study was conducted to explore the cognitive processes linking people's perceptions of their mobile dating app experience and their intention to commit infidelity. Three hundred and ninety-five participants were recruited through a U.S. based university (44.6%) and MTurk (55.4%). Our results indicate that people's perceived success on a dating app was positively associated with their intention to commit infidelity through self-perceived desirability, and negatively associated with their intention to commit infidelity through perceived amount of available partners. These findings are discussed in light of theories of relational investment.

Assessment Of Bias In Police Lineups., Nancy K. Steblay, Gary L. Wells

Faculty Authored Articles

Materials from five extant field studies were analyzed to determine the level of structural bias in police lineups. Depending on the jurisdiction, between 33% and 68% of lineups sampled from 1,548 real police lineups scored as suspect-biased using mock-witness proportion score. The suspect did not draw a fair portion of mock-witness picks in 20% of field lineups (reverse-biased lineups). Lineup fairness measures revealed that a point estimate (mean) for a set of lineups can mask significant problems in lineup construction and that any single lineup should not be assumed to be fair based on an aggregate score. A sample of …