Digital Commons Network^™

The Supercam Instrument Suite On The Nasa Mars 2020 Rover: Body Unit And Combined System Tests, Roger C. Wiens, Sylvestre Maurice, Scott H. Robinson, Anthony E. Nelson, Philippe Cais, Pernelle Bernardi, Raymond T. Newell, Sam Clegg, Shiv K. Sharma, Steven Storms, Jonathan Deming, Darrel Beckman, Ann M. Ollila, Olivier Gasnault, Ryan B. Anderson, Yves André, Stanley M. Angel, Gorka Arana, Elizabeth Auden, Pierre Beck, Et. Al.

Faculty Publications

The SuperCam instrument suite provides the Mars 2020 rover, Perseverance, with a number of versatile remote-sensing techniques that can be used at long distance as well as within the robotic-arm workspace. These include laser-induced breakdown spectroscopy (LIBS), remote time-resolved Raman and luminescence spectroscopies, and visible and infrared (VISIR; separately referred to as VIS and IR) reflectance spectroscopy. A remote micro-imager (RMI) provides high-resolution color context imaging, and a microphone can be used as a stand-alone tool for environmental studies or to determine physical properties of rocks and soils from shock waves of laser-produced plasmas. SuperCam is built in three parts: …

Well-Scale Multiphase Flow Characterization And Validation Using Distributed Fiber-Optic Sensors For Gas Kick Monitoring, Jyotsna Sharma, Otto L.A. Santos, Giuseppe Feo, Oloruntoba Ogunsanwo, Wesley Williams

Faculty Publications

Early detection of a gas kick is crucial for preventing uncontrolled blowout that could cause loss of life, loss of assets, and environmental damage. Multiphase flow experiments conducted in this research demonstrate the capability of downhole fiber optic sensors to detect a potential gas influx in real-time in a 5000 ft deep wellbore. Gas rise velocities estimated independently using fiber optic distributed acoustic sensor (DAS), distributed temperature sensor (DTS), downhole gauges, surface measurements, and multiphase flow correlations show good agreement in each case, demonstrating reliability in the assessment. Real-time data visualization was implemented on a secure cloud-based platform to improve …

Weaving Strands Of Knowledge: Leaning About Environmental Change In The Bhutan Himalayas, Sameer Honwad, Andrew D. Coppens, Greg Defrancis, Marcos Stafne Montshire, Shivaraj Bhattarai

Faculty Publications

Climate change is a complex phenomenon, so much so that even those with expert knowledge on the scientific data struggle to understand the impacts of climate change on their everyday lives. Contradictions across systems of knowledge make clear that climate change is not just a problem of scientific understanding but is also simultaneously a problem of global coordination as well as a sociopolitical problem of connecting domains of knowledge that are seldom valued equitably. The project described in this paper is a prototype effort to put knowledge from community members in two culturally distinct rural areas of the world at …

Spectral Absorption Coefficient Of Additive Manufacturing Materials, Nicholas J. Wallace, Matthew R. Jones, Nathan B. Crane

Faculty Publications

Active thermography techniques are of interest for quality assurance of additive manufacturing processes. However, accurate measurements of thermophysical properties of materials are required to successfully implement active thermography. In particular, the spectral absorption coefficient of materials commonly used in additive manufacturing must be known to accurately predict the spatial distribution of thermal energy generated from absorption of power emitted by a laser or pulsed flash lamp. Accurate measurements of these optical properties are also needed to develop greater understanding of additive manufacturing processes that rely on radiative heat transfer to fuse powders. This paper presents spectral absorption coefficient measurements and …

Bilite: A Bayesian Randomized Phase Ii Design For Immunotherapy By Jointly Modeling The Longitudinal Immune Response And Time-To-Event Efficacy, Beibei Guo, Yong Zang

Faculty Publications

Immunotherapy—treatments that target a patient's immune system—has attracted considerable attention in cancer research. Its recent success has led to generation of novel immunotherapeutic agents that need to be evaluated in clinical trials. Two unique features of immunotherapy are the immune response and the fact that some patients may achieve long-term durable response. In this article, we propose a two-arm Bayesian adaptive randomized phase II clinical trial design for immunotherapy that jointly models the longitudinal immune response and time-to-event efficacy (BILITE), with a fraction of patients assumed to be cured by the treatment. The longitudinal immune response is modeled using hierarchical …

Everyone, Everywhere, Every Time, Clayton A. Copeland Phd

Faculty Publications

The University of South Carolina’s Knowledge School has a commitment. The commitment: Everyone. Everywhere. Every time. The “Knowledge School” is about empowerment. It is about accessing abilities in everyone. It is about using abilities to ensure knowledge creation. And it is about using abilities to ensure equity. This chapter defines a philosophy rooted in tenets of universal access and design. It then highlights several initiatives in teaching, research, and service that put the philosophy into action.

Comparing Greedy Constructive Heuristic Subtour Elimination Methods For The Traveling Salesman Problem, Petar Jackovich, Bruce A. Cox, Raymond R. Hill

Faculty Publications

Purpose — This paper aims to define the class of fragment constructive heuristics used to compute feasible solutions for the traveling salesman problem (TSP) into edge-greedy and vertex-greedy subclasses. As these subclasses of heuristics can create subtours, two known methodologies for subtour elimination on symmetric instances are reviewed and are expanded to cover asymmetric problem instances. This paper introduces a third novel subtour elimination methodology, the greedy tracker (GT), and compares it to both known methodologies. Design/methodology/approach — Computational results for all three subtour elimination methodologies are generated across 17 symmetric instances ranging in size from 29 vertices to 5,934 …

Contractual Procurement Alternatives Of Air Force Contingency Pharmaceuticals: A Cost-Benefit Analysis, Adam J. Brubakken, John M. Dickens, Jason Andrerson, William A. Cunningham Iii

Faculty Publications

Purpose — This paper aims to explore effective supply chain principles, through the theory of transaction cost economics, as measures to improve current contingency pharmaceutical item shortfalls in the Air Force Medical Service (AFMS) Contingency Pharmaceutical Programme. Design/methodology/approach — In this research, AFMS contingency pharmaceutical data was collected from various databases, including the Joint Medical Asset Repository, Medical Contingency Requirements Workflow and the Medical Requirements List. Through the methodology of cost-benefit analysis, alternative sourcing and fulfilment practices are evaluated. Findings — The findings of this research indicate that the application of centralized purchasing principles, in an effort to leverage prime …

Modified C-17 Taxi Procedures: A Fuel Cost Savings Exploration, Michael Wells, Michael Krester, Benjamin Hazen, Jeffery D. Weir

Faculty Publications

Purpose — This study aims to explore the viability of using C-17 reduced-engine taxi procedures from a cost savings and capability perspective. Design/methodology/approach — This study model expected engine fuel flow based on the number of operational engines, aircraft gross weight (GW) and average aircraft groundspeed. Using this model, the research executes a cost savings simulation estimating the expected annual savings produced by the proposed taxi methodology. Operational and safety risks are also considered. Findings — The results indicate that significant fuel and costs savings are available via the employment of reduced-engine taxi procedures. On an annual basis, the mobility …

Effective Early Treatment Of Microcystis Exponential Growth And Microcystin Production With Hydrogen Peroxide And Hydroxyapatite, Ian Struewing, Nathan Sienkiewicz, Chiqian Zhang, Nicholas Dugan, Jingrang Lu

Faculty Publications

: Mitigating cyanotoxin production is essential to protecting aquatic ecosystems and public health. However, current harmful cyanobacterial bloom (HCB) control strategies have significant shortcomings. Because predicting HCBs is difficult, current HCB control strategies are employed when heavy HCBs have already occurred. Our pilot study developed an effective HCB prediction approach that is employed before exponential cyanobacterial growth and massive cyanotoxin pro‐ duction can occur. We used a quantitative polymerase chain reaction (qPCR) assay targeting the toxin‐encoding gene mcyA to signal the timing of treatment. When control measures were applied at an early growth stage or one week before the exponential …

Direct Measurement Of The Cosmic-Ray Carbon And Oxygen Spectra From 10 Gev/ N To 2.2 Tev/ N With The Calorimetric Electron Telescope On The International Space Station, O. Adriani, Y. Akaike, K. Asano, Y. Asaoka, M. G. Bagliesi, E. Berti, G. Bigongiari, W. R. Binns, M. Bongi, P. Brogi, A. Bruno, J. H. Buckley, N. Cannady, G. Castellini, C. Checchia, M. L. Cherry, G. Collazuol, K. Ebisawa, H. Fuke, S. Gonzi, T. G. Guzik, T. Hams, K. Hibino, M. Ichimura, K. Ioka, W. Ishizaki, M. H. Israel, K. Kasahara, J. Kataoka, R. Kataoka, Y. Katayose, C. Kato, N. Kawanaka

Faculty Publications

In this paper, we present the measurement of the energy spectra of carbon and oxygen in cosmic rays based on observations with the Calorimetric Electron Telescope on the International Space Station from October 2015 to October 2019. Analysis, including the detailed assessment of systematic uncertainties, and results are reported. The energy spectra are measured in kinetic energy per nucleon from 10 GeV/n to 2.2 TeV/n with an all-calorimetric instrument with a total thickness corresponding to 1.3 nuclear interaction length. The observed carbon and oxygen fluxes show a spectral index change of ∼0.15 around 200 GeV/n established with a significance >3σ. …

Cultural Identity Formation: A Personal Narrative, Jose Carbajal

Faculty Publications

This paper provides an autoethnography of personal experiences and perceptions of being a minoritized individual. This is the story of a professional social worker learning to adapt to social norms and expectations of self. I discuss the struggles I experienced as an adolescent and as a young adult attending college. This narrative highlights the intersection of faith and social work at moments in my professional development. It is at this intersection that this social worker learns to live a holistic life without feeling discriminated against or ashamed of his identity. I begin to actualize a reality with imperfect beings who …

Agnew, Abc, And Richard Nixon's War On Television, Dale L. Cressman Phd

Faculty Publications

Less than a year into the presidency of Richard Nixon, Vice President Spiro Agnew launched a series of attacks on television journalists, accusing them of being biased and having too much power to determine what news millions of Americans watched on their televisions. Because the government licensed and regulated their stations, the networks considered Agnew's statements, and other White House criticisms, to be threats. As the smallest, most vulnerable network, ABC found itself at a confluence of relationships with the administration: It employed both Nixon's favorite and least favorite anchors, as well as a highly placed executive who lent sympathy …

A Concept Of The Transition Radiation Detector For A Hadron Separation In A Forward Direction Of The Lhc Experiments, N. Belyaev, M. L. Cherry, S. A. Doronin, K. Filippov, P. Fusco, F. Gargano, S. Konovalov, F. Loparco, M. N. Mazziotta, A. Mufazalova, S. Nechaeva, D. Ponomarenko, C. Rembser, A. Romaniouk, A. A. Savchenko, E. Shulga, S. Smirnov, Yu Smirnov, P. Spinelli, L. Sultanaliyeva, P. Teterin, V. Tikhomirov, K. Vorobev, K. Zhukov

Faculty Publications

Studying of hadron production in forward direction at the LHC energy has a great interest both for understanding of the fundamental QCD processes and also in applied areas such as the description of ultra-high energy cosmic particle interactions. The energies of secondary hadrons in such studies almost reach the maximum energy available at the LHC of ∼6 TeV, which corresponds to a Lorentz γ-factor up to 104 and above. The only effective technique able to identify particles in this range is based on the transition radiation detectors (TRD). Prototypes of such kind of detector were built and tested at the …

Registration Of The Transition Radiation With Gaas Detector: Data/Mc Comparison, J. Alozy, N. Belyaev, B. L. Bergmann, T. R.V. Billoud, P. Broulim, P. Burian, M. Campbell, G. Chelkov, M. Cherry, F. Dachs, S. Doronin, K. Filippov, P. Fusco, F. Gargano, E. H.M. Heijne, S. Konovalov, X. Llopart Cudie, F. Loparco, M. N. Mazziotta, L. Meduna, H. Pernegger, D. Ponomarenko, S. Pospisil, D. Rastorguev, C. Rembser, A. Romaniouk, A. A. Savchenko, E. J. Schioppa, S. Smirnov, Y. Smirnov, P. Smolyanskiy, P. Spinelli, M. Strikhanov

Faculty Publications

New developments of pixel detectors based on GaAs sensors offer effective registration of the transition radiation (TR) X-rays and perform simultaneous measurements of their energies and emission angles. This unique feature opens new possibilities for particle identification on the basis of maximum available information about generated TR photons. Results of studies of TR energy-Angular distributions using a 500 |j.m thick GaAs sensor attached to a Timepix3 chip are presented. Measurements, analysis techniques and a comparison with Monte Carlo (MC) simulations are described and discussed.

From Community Policing To Political Police In Nicaragua, Lucia Dammert, Mary Fran T. Malone

Faculty Publications

In a region plagued by high rates of violent crime and repressive policing practices, Nicaragua has earned a reputation as exceptional. Despite poverty, inequality, and a historical legacy of political violence and repression, Nicaragua has defied regional trends. It has registered low rates of violent crime while deploying policing practices that emphasized prevention over repression. April 2018 marked an end to this exceptionalism. Police attacked anti-government protestors, and launched a sustained campaign against dissidents that continues to the present day. While the Nicaraguan police had long cultivated a reputation as community-oriented and non-repressive, they appeared to quickly change into a …

Destabilizing Effects On A Classic Tri-Trophic Oyster Reef Cascade, Virginia R. Schweiss, Chet F. Rakocinski

Faculty Publications

How interactions among multiple predators affect the stability of trophic cascades is a topic of special ecological interest. To examine factors affecting the stability of the classic tri-trophic oyster reef cascade within a different context, configurations of three predators, including the Gulf toadfish, Gulf stone crab, and oystershell mud crab, were manipulated together with either oyster shell or limestone gravel substrate within a multiple predator effects (MPE) experiment. Additionally, a complimentary set of trait-mediated-indirect interaction (TMII) experiments examined the inhibition of oyster consumption relative to mud-crab size and top predator identity in the absence of other cues and factors. The …

Optomechanical Entanglement At Room Temperature: A Simulation Study With Realistic Conditions, Kahlil Y. Dixon, Lior Cohen, Narayan Bhusal, Christopher Wipf, Jonathan P. Dowling, Thomas Corbitt

Faculty Publications

Quantum entanglement is the key to many applications like quantum key distribution, quantum teleportation, and quantum sensing. However, reliably generating quantum entanglement in macroscopic systems has proven to be a challenge. Here, we present a detailed analysis of ponderomotive entanglement generation in a movable-end-mirror-type optomechanical cavity. These cavities utilize optomechanical interactions between the intracavity field and the end mirror to create quantum correlations. We numerically calculate an entanglement measure, the logarithmic negativity, for the quantitative assessment of the entanglement. Experimental limitations, including thermal noise and optical loss, from measurements of an existing experiment were included in the calculation, which is …

A Survey On Subsurface Signal Propagation, Usman Raza, Abdul Salam

Faculty Publications

Wireless Underground Communication (WUC) is an emerging field that is being developed continuously. It provides secure mechanism of deploying nodes underground which shields them from any outside temperament or harsh weather conditions. This paper works towards introducing WUC and give a detail overview of WUC. It discusses system architecture of WUC along with the anatomy of the underground sensor motes deployed in WUC systems. It also compares Over-the-Air and Underground and highlights the major differences between the both type of channels. Since, UG communication is an evolving field, this paper also presents the evolution of the field along with the …

The Evolution Of A Tropical Biodiversity Hotspot, M G. Harvey, G A. Bravo, S Claramunt, A M. Cuervo, M G. Harvey, J Battilana, G F. Seeholzer, J S. Mckay, B C. O'Meara, B C. Faircloth, S V. Edwards, J Perez-Eman, R G. Moyle, F H. Sheldon, A Aleixo, B T. Smith, R T. Chesser, L F. Silveira, J Cracraft, R T. Brumfield, E P. Derryberry

Faculty Publications

The tropics are the source of most biodiversity yet inadequate sampling obscures answers to fundamental questions about how this diversity evolves. We leveraged samples assembled over decades of fieldwork to study diversification of the largest tropical bird radiation, the suboscine passerines. Our phylogeny, estimated using data from 2389 genomic regions in 1940 individuals of 1287 species, reveals that peak suboscine species diversity in the Neotropics is not associated with high recent speciation rates but rather with the gradual accumulation of species over time. Paradoxically, the highest speciation rates are in lineages from regions with low species diversity, which are generally …

Precision Measurement Of The Ratio Β(Y(3S) → Τ + Τ−) / Β( Y(3S)→ Μ+ Μ−, J. P. Lees, V. Poireau, V. Tisserand, E. Grauges, A. Palano, G. Eigen, D. N. Brown, Yu. G. Kolomensky, M. Fritsch, H. Koch, T. Schroeder, R. Cheaib, C. Hearty, T. S. Mattison, J. A. Mckenna, R. Y. So, V. E. Blinov, A. R. Buzykaev, V. P. Druzhinin, Milind Purohit, Et. Al.

Faculty Publications

We report on a precision measurement of the ratio Rϒð3SÞ τμ ¼ Bðϒð3SÞ → τþτ−Þ=Bðϒð3SÞ → μþμ−Þ using data collected with the BABAR detector at the SLAC PEP-II eþe− collider. The measurement is based on a 28 fb−1 data sample collected at a center-of-mass energy of 10.355 GeV corresponding to a sample of 122 million ϒð3SÞ mesons. The ratio is measured to be Rϒð3SÞ τμ ¼ 0.966 0.008stat 0.014syst and is in agreement with the standard model prediction of 0.9948 within 2 standard deviations. The uncertainty in Rϒð3SÞ τμ is almost an order of magnitude smaller than the only previous …

Berry Phase Manipulation In Ultrathin Srruo3 Films, Liang Wu, Fangdi Wen, Yixing Fu, Justin H. Wilson, Xiaoran Liu, Yujun Zhang, Denis M. Vasiukov, Mikhail S. Kareev, J. H. Pixley, Jak Chakhalian

Faculty Publications

Berry phase is a powerful concept that unravels the nontrivial role of topology in phenomena observed in chiral magnetic materials and structures. A celebrated example is the anomalous Hall effect (AHE) driven by the nonvanishing Berry phase in momentum space. As the AHE is dependent on details of the band structure near the Fermi edge, the Berry phase and AHE can be altered in thin films whose chemical potential is tunable by dimensionality and disorder. Here, we demonstrate how Berry phase in ultrathin SrRuO3 films provides a comprehensive explanation for the nontrivial Hall response which is conventionally attributed to the …

Building Digital Libraries: A How-To-Do-It Manual For Librarians, 2nd Ed. By Kyle Banerjee And Terry Reese Jr. [Review], Geoffrey D. Reynolds

Faculty Publications

No abstract provided.

Evaluating A Technology-Mediated Hpv Vaccination Awareness Intervention: A Controlled, Quasi-Experimental, Mixed Methods Study, Heather M. Brandt, Beth Sundstrom, Courtney M. Monroe, Gabrielle Turner-Mcgrievy, Chelsea Larsen, Melissa Stansbury, Karen Magradey, Andrea Gibson, Delia Smith West

Faculty Publications

College-aged women and men are an important catch-up population for human papillomavirus (HPV) vaccination interventions. Limited research has explored technology-mediated HPV vaccination awareness interventions aimed at college students. The purpose was to evaluate a novel, technology-mediated, social media-based intervention to promote HPV vaccination among college students. A controlled, quasi-experimental, mixed methods study examined the feasibility of a technology-based intervention among two undergraduate classes ( = 58) at a public university in the southeastern United States of America. Classes were randomized to receive one of two cancer prevention programs (i.e., HPV vaccination (intervention) or healthy weight (control)). Both programs contained eight …

One-Dimensional Turbulence (Odt): Computationally Efficient Modeling And Simulation Of Turbulent Flows, Victoria B. Stephens, David O. Lignell

Faculty Publications

One-dimensional turbulence (ODT) is an accurate and computationally efficient model for simulating turbulent flows. ODT has been applied to a wide range of flow problems including reaction, multiphase, differential diffusion, heat release, buoyancy, and wall flows. Applications include use as a standalone model and as a closure for large-eddy simulation (LES). Its strength lies in the ability to capture a full range of turbulent length and time scales. The ODT model is strongly coupled with its implementation, complicating its formulations. We present a modern, open-source, object-oriented C++ implementation of ODT. The code described here and made available online can be …

Camkiiα-Positive Interneurons Identified Via A Microrna-Based Viral Gene Targeting Strategy, Marianna K. Keaveney, Bahar Rahsepar, Hua-An Tseng, Fernando R. Fernandez, Rebecca A. Mount, Tina Ta, John A. White, Jim Berg, Xue Han

Faculty Publications

No abstract provided.

Entropic Signatures Of The Skyrmion Lattice Phase In Mnsi1-Xalx And Fe1-Ycoysi, C. Dhital, J. F. Ditusa

Faculty Publications

The entropic signatures of magnetic phase transitions in the skyrmion lattice host compounds MnSi0.962Al0.038 and Fe0.7Co0.3Si were investigated through low field magnetization and ac susceptibility measurements. These data indicate that the conical to skyrmion transition that occurs with the application of magnetic field in MnSi0.962Al0.038 is characterized by clear discontinuity in the magnetic entropy as expected for first order topological phase transition. These same magnetoentropic features are negligibly small in isostructural Fe0.7Co0.3Si due to the level of chemical substitution related disorder and differences in the spin dynamics (range and timescales). Despite the obvious similarities in the magnetic structures of these …

Does Inhibitory Control Training Reduce Weight And Caloric Intake In Adults With Overweight And Obesity? A Pre-Registered, Randomized Controlled Event-Related Potential (Erp) Study, Kaylie A. Carbine, Alexandra M. Muir, Whitney D. Allen, James D. Lecheminant, Scott A. Baldwin, Chad D. Jensen, C. Brock Kirwan, Michael Larson

Faculty Publications

A cognitive intervention that may reduce weight and caloric intake is inhibitory control training (ICT; having individuals repeatedly withhold dominant responses to unhealthy food images). We conducted a randomized controlled trial where 100 individuals with overweight or obesity were assigned to complete a generic (n = 48) or food-specific ICT (n = 52) training four times per week for four weeks. Weight and caloric intake were ob- tained at baseline, four-weeks, and 12-weeks. Participants also completed high-calorie and neutral go/no-go tasks while N2 event-related potential (ERP) data, a neural indicator of inhibitory control, was measured at all visits. Results from …

Interleukin-17-Induced Neutrophil Extracellular Traps Mediate Resistance To Checkpoint Blockade In Pancreatic Cancer, Yu Zhang, Vidhi Chandra, Erick Riquelme Sanchez, Prasanta Dutta, Pompeyo R. Quesada, Amanda Rakoski, Michelle Zoltan, Nivedita Arora, Seyda Baydogan, William Horne, Jared Burks, Hanwen Xu, Perwez Hussain, Huamin Wang, Sonal Gupta, Anirban Maitra, Jennifer M. Bailey, Seyed J. Moghaddam, Sulagna Banerjee, Ismet Sahin, Pratip Bhattacharya

Faculty Publications

Pancreatic ductal adenocarcinoma (PDAC) remains a lethal malignancy with an immunosuppressive microenvironment that is resistant to most therapies. IL17 is involved in pancreatic tumorigenesis, but its role in invasive PDAC is undetermined. We hypothesized that IL17 triggers and sustains PDAC immunosuppression. We inhibited IL17/IL17RA signaling using pharmacological and genetic strategies alongside mass cytometry and multiplex immunofluorescence techniques. We uncovered that IL17 recruits neutrophils, triggers neutrophil extracellular traps (NETs), and excludes cytotoxic CD8 T cells from tumors. Additionally, IL17 blockade increases immune checkpoint blockade (PD-1, CTLA4) sensitivity. Inhibition of neutrophils or Padi4-dependent NETosis phenocopies IL17 neutralization. NMR spectroscopy revealed changes in …

Information Uncertainty: A Correlate For Acute Stress Disorder During The Covid-19 Outbreak In China, Danhua Lin, Daniela B. Friedman Ph.D., Shan Qiao Ph.D., Cheuk Chi Tam, Xiaoyan Li, Xiaoming Li Ph.D.

Faculty Publications

Background: Individuals’ stress in responding to the current COVID-19 pandemic may be exacerbated by information uncertainty driven by inconsistent, unverified, and conflicting news from various sources. The current study aims to test if information uncertainty during the COVID-19 outbreak was related to acute stress disorder (ASD) over and above other psychosocial stressors.

Methods: An anonymous online survey was conducted with 7800 college students throughout China from January 31 through February 11, 2020. Existing scales were modified to measure ASD and six potential stressors including information uncertainty during the COVID-19 outbreak. Hierarchical regression analysis was conducted to assess the unique association …