Digital Commons Network^™

Quantum Scalar Fields Interacting With Quantum Black Hole Asymptotic Regions, Rodolfo Gambini, Jorge Pullin

Faculty Publications

We continue our work on the study of spherically symmetric loop quantum gravity coupled to two spherically symmetric scalar fields, with one that acts as a clock. As a consequence of the presence of the latter, we can define a true Hamiltonian for the theory. In previous papers, we studied the theory for large values of the radial coordinate, i.e., far away from any black hole or star that may be present. This makes the calculations considerably more tractable. We have shown that in the asymptotic region, the theory admits a large family of quantum vacua for quantum matter fields …

Thermoelectric Properties Of Snse And Snse2 Single Crystals, Abhinna Rajbanshi, Daniel Duong, Eklavya Thareja, Williams A. Shelton, Rongying Jin

Faculty Publications

Thermoelectric materials can serve for conversion between thermal and electrical energy. In the search for thermoelectric materials, layered SnSe and SnSe2 are promising candidates. We have successfully synthesized SnSe and SnSe2 single crystals by the modified Bridgman method and studied their thermoelectric properties: thermopower (S), thermal conductivity (κ), and electrical conductivity (σ) in the temperature range between 2 and 400 K, which are absent in the literature. The kink observed in the thermopower corresponds to the metallic-nonmetallic crossover temperature for both SnSe and SnSe2, reflecting their inherent electronic nature. Compared with SnSe2, >100 K, we find that SnSe exhibits higher …

Engineering A Non-Hermitian Second-Order Topological Insulator State In Quasicrystals, Chakradhar Rangi, Ka Ming Tam, Juana Moreno

Faculty Publications

Non-Hermitian topological phases have gained immense attention due to their potential to unlock novel features beyond Hermitian bounds. PT-symmetric (parity time-reversal symmetric) non-Hermitian models have been studied extensively over the past decade. In recent years, the topological properties of general non-Hermitian models, regardless of the balance between gains and losses, have also attracted vast attention. Here, we propose a non-Hermitian second-order topological (SOT) insulator that hosts gapless corner states on a two-dimensional quasicrystalline lattice (QL). We first construct a non-Hermitian extension of the Bernevig-Hughes-Zhang model on a QL generated by the Amman-Beenker tiling. This model has real spectra and supports …

Klebsiella Pneumoniae Deda Family Proteins Have Redundant Roles In Divalent Cation Homeostasis And Resistance To Phagocytosis, Vijay Tiwari, Amit Sharma, Reygan Braga, Emily Garcia, Ridhwana Appiah, Renee Fleeman, Basel H. Abuaita, Marianna Patrauchan, William T. Doerrler

Faculty Publications

The DedA superfamily is a highly conserved family of membrane proteins. Deletion of Escherichia coli yqjA and yghB, encoding related DedA family proteins, results in sensitivity to elevated temperature, antibiotics, and alkaline pH. The human pathogen Klebsiella pneumoniae possesses genes encoding DedA family proteins with >90% amino acid identity to E. coli YqjA and YghB. We hypothesized that the deletion of K. pneumoniae yqjA and yghB will impact its physiology and may reduce its virulence. The K. pneumoniae ΔyqjA ΔyghB mutant (strain VT101) displayed a growth defect at 42°C and alkaline pH sensitivity, not unlike its E. coli counterpart. However, …

Opposing Genetic Patterns Of Range Shifting Temperate And Tropical Gastropods In An Area Undergoing Tropicalisation, Karolina M. Zarzyczny, Michael E. Hellberg, Elena B. Lugli, Moira Maclean, David A. Paz-García, Marc Rius, Ethan G. Ross, Erick X. Treviño Balandra, James Vanstone, Suzanne T. Williams, Phillip B. Fenberg

Faculty Publications

Aim: The poleward range expansion of tropical species, and range contraction of temperate species (known as tropicalisation) has mainly been studied from an ecological perspective, with little research on its genetic consequences. Here, we used distributional and genetic data to document the consequences of tropicalisation in rocky shore gastropods and assess more broadly the future implications of tropicalisation on phylogeographic patterns. Location: Nineteen sampling sites along >3000 km of the eastern Pacific rocky intertidal zone, from the tip of the Baja California Peninsula to southern California. Taxon: Temperate gastropods: Lottia conus, L. strigatella, Fissurella volcano and Tegula gallina. Tropical gastropods: …

Mapping Crown Rust Resistance In The Oat Diploid Accession Pi 258731 (Avena Strigosa), Rawnaq N. Chowdhury, Tyler Gordon, Md Ali Babar, Stephen A. Harrison, Shahryar F. Kianian, Kathy Esvelt Klos

Faculty Publications

Oat crown rust, caused by Puccinia coronata Corda f. sp. avenae Eriks. (Pca), is a major biotic impediment to global oat production. Crown rust resistance has been described in oat diploid species A. strigosa accession PI 258731 and resistance from this accession has been successfully introgressed into hexaploid A. sativa germplasm. The current study focuses on 1) mapping the location of QTL containing resistance and evaluating the number of quantitative trait loci (QTL) conditioning resistance in PI 258731; 2) understanding the relationship between the original genomic location in A. strigosa and the location of the introgression in the A. sativa …

Approaching 25 Years Of Progress Towards Fusarium Head Blight Resistance In Southern Soft Red Winter Wheat (Triticum Aestivum L.), Richard E. Boyles, Carolina Ballén-Taborda, Gina Brown-Guedira, Jose Costa, Christina Cowger, Noah Dewitt, Carl A. Griffey, Stephen A. Harrison, Amir Ibrahim, Jerry Johnson, Jeanette Lyerly, David S. Marshall, R. Esten Mason, Mohamed Mergoum, J. Paul Murphy, Nicholas Santantonio, Gautam Saripalli, Russell Sutton, Vijay Tiwari, David Van Sanford, Zachary J. Winn

Faculty Publications

Tremendous progress has been made in variety development and host plant resistance to mitigate the impact of Fusarium head blight (FHB) since the disease manifested in the southeastern United States in the early 2000s. Much of this improvement was made possible through the establishment of and recurring support from the US Wheat & Barley Scab Initiative (USWBSI). Since its inception in 1997, the USWBSI has enabled land-grant institutions to make advances in reducing the annual threat of devastating FHB epidemics. A coordinated field phenotyping effort for annual germplasm screening has become a staple tool for selection in public and private …

Irrigation Of Sand-Based Creeping Bentgrass Putting Greens With Nanobubble-Oxygenated Water, Eric J. Deboer, Michael D. Richardson, John H. Mccalla

Faculty Publications

Cultural and environmental factors can place creeping bentgrass (Agrostis stolonifera) under extreme stress during the summer months. This stress, coupled with the growth adaptation of creeping bentgrass, can result in shallow, poorly rooted stands of turf. To enhance root zone oxygen and rooting of creeping bentgrass, golf courses use methods such as core and solid-tine aerification, and sand topdressing. An additional method of delivering oxygen to the soil could be irrigation with nanobubble-oxygenated water. The properties of nanobubbles (NBs) allow for high gas dissolution rates in water. Irrigating with NB-oxygenated water sources may promote increased rooting of creeping bentgrass putting …

Genomic And Population Characterization Of A Diversity Panel Of Dwarf And Tall Coconut Accessions From The International Coconut Genebank For Latin America And Caribbean, Allison Vieira Da Silva, Emiliano Fernandes Nassau Costa, Leandro Eugenio Cardamone Diniz, Semíramis Rabelo Ramalho Ramos, Roberto Fritsche-Neto

Faculty Publications

The characterization and construction of genetic diversity panels provide valuable information for developing germplasm conservation strategies and applying advanced breeding techniques. Thus, we performed analysis of diversity and genetic structure in Cocos nucifera L. with a collection of dwarf and tall accessions belonging to the International Coconut Genebank for Latin America in the Caribbean. The collection comprises six dwarf accessions (represented by 36 individuals) and six tall (represented by 48 individuals). The analysis of clustering and DAPC performed from a set of 4044 SNP markers showed the existence of three clusters, one of which was formed exclusively by all dwarf …

Hamiltonian Formulation And Symplectic Split-Operator Schemes For Time-Dependent Density-Functional-Theory Equations Of Electron Dynamics In Molecules, François Mauger, Cristel Chandre, Mette B. Gaarde, Kenneth Lopata, Kenneth J. Schafer

Faculty Publications

We revisit Kohn–Sham time-dependent density-functional theory (TDDFT) equations and show that they derive from a canonical Hamiltonian formalism. We use this geometric description of the TDDFT dynamics to define families of symplectic split-operator schemes that accurately and efficiently simulate the time propagation for certain classes of DFT functionals. We illustrate these with numerical simulations of the far-from-equilibrium electronic dynamics of a one-dimensional carbon chain. In these examples, we find that an optimized 4th order scheme provides a good compromise between the numerical complexity of each time step and the accuracy of the scheme. We also discuss how the Hamiltonian structure …

Ras/Mapk Signaling Mediates Adipose Tissue Control Of Ovarian Germline Survival And Ovulation In Drosophila Melanogaster, Tancia Bradshaw, Chad Simmons, Rachael Ott, Alissa Richmond Armstrong

Faculty Publications

From insects to humans, oogenesis is tightly linked to nutritional input, yet little is known about how whole organism physiology matches dietary changes with oocyte development. Considering that diet-induced adipose tissue dysfunction is associated with an increased risk for fertility problems, and other obesity-associated pathophysiologies, it is critical to decipher the cellular and molecular mechanisms linking adipose nutrient sensing to remote control of the ovary and other tissues. Our previous studies in Drosophila melanogaster have shown that amino acid sensing, via the amino acid response pathway and mTOR-mediated signaling function within adipocytes to control germline stem cell maintenance and ovulation, …

Geospatial Analytics Extension For Knime, Lingbo Liu, Xiaokang Fu, Tobias Kötter, Kevin Sturm, Carsten Haubold, Weihe Wendy Guan, Shuming Bao, Fahui Wang

Faculty Publications

The Geospatial Analytics Extension for KNIME (GAEK) is an innovative tool designed to integrate visual programming with geospatial analytics, streamlining GIS education and research in social sciences. GAEK simplifies access for users with an intuitive, visual interface for complex spatial analysis tasks and contributes to the organization of the GIS Knowledge Tree through its geospatial analytics nodes. This paper discusses GAEK's architecture, functionalities, and its transformative impact on GIS applications. While GAEK significantly enhances user experience and research reproducibility, future updates aim to expand its functionality and optimize its bundled environment.

Editorial Introduction: Charting New Theoretical Horizons Here And Elsewhere, Geoboo Song, Melissa K. Merry, Saba Siddiki, Holly L. Peterson, Davor Mondom, Victor Kwaku Akakpo, Gwen Arnold, Aaron Smith-Walter, Creed Tumlison, Briana Huett, Heasun Choi, Eli Polley

Faculty Publications

No abstract provided.

Life Cycle Assessment Of Hydrothermal Carbonization: A Review Of Product Valorization Pathways, Andrea Ogunleye, Joseph Flora, Nicole Berge

Faculty Publications

Hydrothermal carbonization (HTC) has the potential to be a sustainable and environmentally beneficial approach for organic waste treatment. It is likely that HTC product use will dictate the viability of large-scale HTC facilities; therefore, understanding the viability and environmental implications associated with HTC product valorization pathways is critical. The overall goal of this review is to gain an understanding of how HTC product valorization is currently being modeled in life cycle assessment studies, and to use such information to assess current research and/or data needs associated with product valorization. To accomplish this, a review of existing HTC literature was conducted …

Sedimentary Processes And Instability On The Mississippi River Delta Front Near The Shipwreck Of The Ss Virginia, Nathan Figueredo, Samuel J. Bentley, Jason D. Chaytor, Kehui Xu, Navid Jafari, Ioannis Y. Georgiou, Melanie Damour, Jeffrey Duxbury, Jeffrey Obelcz, Jillian Maloney

Faculty Publications

Sediment cores were collected from a mudflow lobe (80 m water depth) offshore of the Mississippi River’s Southwest Pass in 2017 to better understand the sedimentology near the lobe entraining the SS Virginia shipwreck (sunk by a German U-boat in 1942) and surrounding Mississippi River delta front. Core analyses included ²¹⁰Pb/¹³⁷Cs geochronology, granulometry, and X-radiography. Sediment accumulation rates (SAR) calculated from excess ²¹⁰Pb activity in multicores are 0.22–0.29 cm/y at seabed depths less than 20 cm and 0.29–0.51 cm/y at depths greater than 20 cm. Accumulation rates for ¹³⁷Cs have been ~0.15 to ~0.37 cm/y …

Ancient Volcanism May Have Influenced Patterns Of Hydrated Regolith On Mars, Tyler G. Paladino, Shannon Kobs Nawotniak, Ehouarn Millour, Suniti Karunatillake, Don R. Hood, Augustus Bates

Faculty Publications

The hydration of the martian regolith at decimeter depth scales varies regionally, suggestive of geologically sustained processes, independent of diurnal soil-atmosphere exchange. A combination of factors, including residual hydration from ancient processes in the hydrosphere/cryosphere, seasonal exchange between the crust and atmosphere in the martian critical zone, or structural water in minerals or salts sourced via hydrothermal processes can contribute to such lateral changes in bulk regolith hydration. Here, we consider the theoretical extent of regolith hydration from explosive volcanic eruptions and subsequent hydration. While magmatic degassing has previously been considered as a contributing factor to regolith hydration, the relationship …

Simultaneous Detection And Quantification Of Multiple Pathogen Targets In Wastewater, Gouthami Rao, Drew Capone, Kevin Zhu, Abigail Knoble, Yarrow Linden, Ryan Clark, Amanda Lai, Juhee Kim, Ching Hua Huang, Aaron Bivins, Joe Brown

Faculty Publications

Wastewater-based epidemiology has emerged as a critical tool for public health surveillance, building on decades of environmental surveillance work for pathogens such as poliovirus. Work to date has been limited to monitoring a single pathogen or small numbers of pathogens in targeted studies; however, few studies consider simultaneous quantitative analysis of a wide variety of pathogens, which could greatly increase the utility of wastewater surveillance. We developed a novel quantitative multi-pathogen surveillance approach (35 pathogen targets including bacteria, viruses, protozoa, and helminths) using TaqMan Array Cards (TAC) and applied the method on concentrated wastewater samples collected at four wastewater treatment …

Energy And Spectrum Efficient Federated Learning Via High-Precision Over-The-Air Computation, Liang Li, Chenpei Huang, Dian Shi, Hao Wang, Xiangwei Zhou, Minglei Shu, Miao Pan

Faculty Publications

Federated learning (FL) enables mobile devices to collaboratively learn a shared prediction model while keeping data locally. However, there are two major research challenges to practically deploy FL over mobile devices: (i) frequent wireless updates of huge size gradients v.s. limited spectrum resources, and (ii) energy-hungry FL communication and local computing during training v.s. battery-constrained mobile devices. To address those challenges, in this paper, we propose a novel multi-bit over-the-air computation (M-AirComp) approach for spectrum-efficient aggregation of local model updates in FL and further present an energy-efficient FL design for mobile devices. Specifically, a high-precision digital modulation scheme is designed …

Assessing Energy Mutual Funds: Performance, Risks, And Managerial Skills, Srinvias Nippani, Davinder Malhotra

Faculty Publications

This study investigates the risk-adjusted performance of energy equity mutual funds across a 23-year period, employing the Cumulative Wealth Index (CWI) to gauge their long-term performance relative to benchmark indices. Despite inherent volatility due to the energy sector’s cyclical nature, these funds consistently outperformed benchmarks based on monthly returns, showcasing resilience amid market fluctuations. However, challenges emerged during the COVID-19 pandemic, with notable improvements post-vaccination. Utilizing a multi-factor model, the research highlights the interconnectivity of energy equity mutual funds with broader market movements and systemic factors. Despite their primary focus on the energy sector, these funds exhibit sensitivity to larger …

Global Change Impacts On Indigenous Sustainability In Sakha Republic: A Synthesis Of Knowledge, Stanislav Saas Ksenofontov, Andrey N. Petrov

Faculty Publications

Indigenous understanding of sustainability is embedded in close relations to land and environment, Indigenous Knowledge systems, Indigenous epistemologies and ontologies, and Indigenous languages. However, the sustainability of Indigenous peoples’ livelihoods is significantly affected by various global change drivers. In the Arctic, Indigenous peoples’ livelihoods are impacted by environmental, social, and cultural changes, including climate change, environmental pollution, economic processes, and resource extraction. This paper aims to review and synthesize recent academic and gray literature on the sustainability of Indigenous communities in Sakha Republic, Northeast Siberia, Russia in the face of global change with a particular focus on land- and water-based …

Finding The Performance: Script Analysis And The Read Aloud Experience, Katherine Thonen

Faculty Publications

There is ample research and information on why reading aloud to children is an important part of literature development, however, there is little research on how adults should go about the reading. This paper examines script analysis techniques used by performers that can be used by children’s librarians and other non-professional readers as literary analysis designed to inform how to infuse a read-aloud session with an engaging performance. There is little research in this area, so this paper is an initial look into the issue and offers suggestions based on the experience of a former children's librarian with a theatre …

First Detection Of Polarization In X-Rays For Psr B0540-69 And Its Nebula, Fei Xie, Josephine Wong, Fabio La Monaca, Roger W. Romani, Jeremy Heyl, Philip Kaaret, Alessandro Di Marco, Niccolò Bucciantini, Kuan Liu, Chi-Yung Ng, Niccolò Di Lalla, Martin C. Weisskopf, Enrico Costa, Paolo Soffitta, Fabio Muleri, Matteo Bachetti, Maura Pilia, John Rankin, Sergio Fabiani, Iván Agudo, Lucio A. Antonelli, Luca Baldini, Wayne H. Baumgartner, Ronaldo Bellazzini, Stefano Bianchi

Faculty Publications

We report on X-ray polarization measurements of the extragalactic Crab-like PSR B0540-69 and its Pulsar Wind Nebula (PWN) in the Large Magellanic Cloud, using a ∼850 ks Imaging X-ray Polarimetry Explorer (IXPE) exposure. The PWN is unresolved by IXPE. No statistically significant polarization is detected for the image-averaged data, giving a 99% confidence polarization upper limit (MDP99) of 5.3% in the 2–8 keV energy range. However, a phase-resolved analysis detects polarization for both the nebula and pulsar in the 4–6 keV energy range. For the PWN defined as the off-pulse phases, the polarization degree (PD) of (24.5 ± 5.3)% and …

Discrepancies In The Properties Of A Coronal Mass Ejection On Scales Of 0.03 Au As Revealed By Simultaneous Measurements At Solar Orbiter And Wind: The 2021 November 3–5 Event, F Regnault, Nada Al-Haddad, Noé Lugaz, Charles J. Farrugia, Wenyuan Yu, Bin Zhuang, E E. Davies

Faculty Publications

Simultaneous in situ measurements of coronal mass ejections (CMEs), including both plasma and magnetic field, by two spacecraft in radial alignment have been extremely rare. Here, we report on one such CME measured by Solar Orbiter (SolO) and Wind on 2021 November 3–5, while the spacecraft were radially separated by a heliocentric distance of 0.13 au and angularly by only 2.2°. We focus on the magnetic cloud (MC) part of the CME. We find notable changes in the R and N magnetic field components and in the speed profiles inside the MC between SolO and Wind. We observe a greater …

First Detection Of Polarization In X-Rays For Psr B0540-69 And Its Nebula, Fei Xie, Josephine Wong, Fabio La Monaca, Roger W. Romani, Jeremy Heyl, Philip Kaaret, Alessandro Di Marco, Niccolò Bucciantini, Kuan Liu, Chi-Yung Ng, Niccolò Di Lalla, Martin C. Weisskopf, Enrico Costa, Paolo Soffitta, Fabio Muleri, Matteo Bachetti, Maura Pilia, John Rankin, Sergio Fabiani, Iván Agudo, Lucio A. Antonelli, Luca Baldini, Wayne H. Baumgartner, Ronaldo Bellazzini, Stefano Bianchi

Faculty Publications

We report on X-ray polarization measurements of the extragalactic Crab-like PSR B0540-69 and its Pulsar Wind Nebula (PWN) in the Large Magellanic Cloud, using a ∼850 ks Imaging X-ray Polarimetry Explorer (IXPE) exposure. The PWN is unresolved by IXPE. No statistically significant polarization is detected for the image-averaged data, giving a 99% confidence polarization upper limit (MDP99) of 5.3% in the 2–8 keV energy range. However, a phase-resolved analysis detects polarization for both the nebula and pulsar in the 4–6 keV energy range. For the PWN defined as the off-pulse phases, the polarization degree (PD) of (24.5 ± 5.3)% and …

Discrepancies In The Properties Of A Coronal Mass Ejection On Scales Of 0.03 Au As Revealed By Simultaneous Measurements At Solar Orbiter And Wind: The 2021 November 3–5 Event, F Regnault, Nada Al-Haddad, Noé Lugaz, Charles J. Farrugia, Wenyuan Yu, Bin Zhuang, E E. Davies

Faculty Publications

Simultaneous in situ measurements of coronal mass ejections (CMEs), including both plasma and magnetic field, by two spacecraft in radial alignment have been extremely rare. Here, we report on one such CME measured by Solar Orbiter (SolO) and Wind on 2021 November 3–5, while the spacecraft were radially separated by a heliocentric distance of 0.13 au and angularly by only 2.2°. We focus on the magnetic cloud (MC) part of the CME. We find notable changes in the R and N magnetic field components and in the speed profiles inside the MC between SolO and Wind. We observe a greater …

The Precarious Art Of Classifying Facts, Allison Orr Larsen

Faculty Publications

In their terrific new article, Fact Stripping, Joseph Blocher and Brandon Garrett bring formidable expertise from their respective fields to tackle the inscrutable puzzle of appellate fact review.

[...]

In this short reply I will add to Blocher and Garrett’s illuminating work by exploring a foundational confusion their article exposes. I will first explain why classifying facts as either suitable for trial or not is a very fraught endeavor; I will then argue that this difficulty allows for significant manipulation and the risk of unprincipled application. Finally, I will nod to prior work and forecast future work where I …

The Juan De La Cruz Molino: Folk Architecture At El Güique-Estaca New Mexico, José A. Rivera Ph.D

Faculty Publications

El Güique and Estaca are twin communities just north of the confluence of the Río Grande and the Río Chama. Like other Spanish colonial settlements in the historic Río Arriba, acequia-based agriculture was essential for food production in this high desert region of the northern Río Grande. Along with the construction of acequias, molinos (grist mills) were built to grind wheat into flour as part of the subsistence farming economy of the times. While acequias were communal, molinos most often were constructed and operated as private enterprises by local millers like the case of Juan de la Cruz Borrego and …

How Consideration Of Future Consequences, Prior Gain Or Loss, Personal Risk Profile, And Justification Affect Risk–Payoff Preferences, W. Eric Lee

Faculty Publications

This study examines (1) how risk–payoff preference can be affected by differences in consideration of future consequences (CFC), prior gain/loss, and personal risk profile, and (2) whether one’s risk–payoff preference may vary with justification prompts. Using an experimental design with 366 undergraduate business students, participants are tasked to make risk–payoff choices in two scenarios, with the combined risk–payoff outcomes serving as the dependent variable. In addition, participants are assessed on their personal risk profiles and also complete the 14-item CFC scale to gauge the propensity to take into account future consequences of their behaviors. Findings show that one who scores …

Professionalizing A Student’S Library Employment Through Experiential Learning Workshops, Marissa Anne Bischoff, Matt Armstrong, David Waddell

Faculty Publications

If intentional, college students in campus jobs can develop professional skills valued in the post-college workforce. However, many students are not likely to realize the potential of their experience without advisement or instruction that teaches them how to reflect on experience and articulate its value, usually in the form of a resume or in an interview. This study examines the value of three workshops to help students reflect on their development of NACE career readiness competencies as a result of their library work experience. Survey and focus group data suggest students’ confidence in their ability to articulate and apply their …

A Codified Liabilty Regime To Stimulate Greater Investment In Subpatentable Innovation, Ana Santos Rutschman, Jerome H. Reichman

Faculty Publications

The global intellectual property system rests on a distinction between exclusive property rights and free competition. Exclusive rights vary in strength and intensity, but the opposite of protection is almost always free competition. Distinctions of intensity are drawn in terms of the length of protection given to different subject matters plus variable lists of exceptions and limitations to exclusive rights. But the bottom line is that, when protection is not available under the existing system, free competition prevails, and vice-versa (i.e., where there is exclusivity, free competition is deferred for a specified period of time).

This Article departs from a …