Digital Commons Network^™

Supercongruences For Rigid Hypergeometric Calabi–Yau Threefolds, Ling Long, Fang Ting Tu, Noriko Yui, Wadim Zudilin

Faculty Publications

We establish the supercongruences for the fourteen rigid hypergeometric Calabi–Yau threefolds over Q conjectured by Rodriguez-Villegas in 2003. Our first method is based on Dwork's theory of p-adic unit roots and it allows us to establish the supercongruences between the truncated hypergeometric series and the corresponding unit roots for ordinary primes. The other method makes use of the theory of hypergeometric motives, in particular, adapts the techniques from the recent work of Beukers, Cohen and Mellit on finite hypergeometric sums over Q. Essential ingredients in executing the both approaches are the modularity of the underlying Calabi–Yau threefolds and a p-adic …

All-Sky Search For Short Gravitational-Wave Bursts In The Third Advanced Ligo And Advanced Virgo Run, R. Abbott

Faculty Publications

This paper presents the results of a search for generic short-duration gravitational-wave transients in data from the third observing run of Advanced LIGO and Advanced Virgo. Transients with durations of milliseconds to a few seconds in the 24-4096 Hz frequency band are targeted by the search, with no assumptions made regarding the incoming signal direction, polarization, or morphology. Gravitational waves from compact binary coalescences that have been identified by other targeted analyses are detected, but no statistically significant evidence for other gravitational wave bursts is found. Sensitivities to a variety of signals are presented. These include updated upper limits on …

See You In The Funny Pages: Forms And Aesthetics Of Newspaper Comic Strips In Bill Watterson's Calvin And Hobbes, Jack Mallard

LSU Doctoral Dissertations

This project looks at how Bill Watterson’s aesthetics and his employment of the comics apparatus, as well as his advocacy for learning the history of the formal development (and decline) of the newspaper comic strip, influence Calvin and Hobbes’ approach to art, family, education, and other cultural topics. By adapting Thierry Groensteen’s theory of spatio-topia, a term describing comics’ ability to provoke meaning from how graphic, verbal, and structural elements inhabit space and relate to one another within space, I demonstrate how Bill Watterson’s quality as a comics artist comes as much from his ability to activate spatio-topic potentials …

A Global Ocean Oxygen Database And Atlas For Assessing And Predicting Deoxygenation And Ocean Health In The Open And Coastal Ocean, Marilaure Grégoire, Véronique Garçon, Hernan Garcia, Denise Breitburg, Kirsten Isensee, Andreas Oschlies, Maciej Telszewski, Alexander Barth, Henry C. Bittig, Jacob Carstensen, Thierry Carval, Fei Chai, Francisco Chavez, Daniel Conley, Laurent Coppola, Sean Crowe, Kim Currie, Minhan Dai, Bruno Deflandre, Boris Dewitte, Robert Diaz, Emilio Garcia-Robledo, Denis Gilbert, Alessandra Giorgetti, Ronnie Glud, Dimitri Gutierrez, Shigeki Hosoda, Masao Ishii, Gil Jacinto, Chris Langdon, Siv K. Lauvset, Lisa A. Levin, Karin E. Limburg

Faculty Publications

In this paper, we outline the need for a coordinated international effort toward the building of an open-access Global Ocean Oxygen Database and ATlas (GO2DAT) complying with the FAIR principles (Findable, Accessible, Interoperable, and Reusable). GO2DAT will combine data from the coastal and open ocean, as measured by the chemical Winkler titration method or by sensors (e.g., optodes, electrodes) from Eulerian and Lagrangian platforms (e.g., ships, moorings, profiling floats, gliders, ships of opportunities, marine mammals, cabled observatories). GO2DAT will further adopt a community-agreed, fully documented metadata format and a consistent quality control (QC) procedure and quality flagging (QF) system. GO2DAT …

Unravelling Rubber Tree Growth By Integrating Gwas And Biological Network-Based Approaches, Felipe Roberto Francisco, Alexandre Hild Aono, Carla Cristina Da Silva, Paulo S. Gonçalves, Erivaldo J. Scaloppi Junior, Vincent Le Guen, Roberto Fritsche-Neto, Livia Moura Souza, Anete Pereira De Souza

Faculty Publications

Hevea brasiliensis (rubber tree) is a large tree species of the Euphorbiaceae family with inestimable economic importance. Rubber tree breeding programs currently aim to improve growth and production, and the use of early genotype selection technologies can accelerate such processes, mainly with the incorporation of genomic tools, such as marker-assisted selection (MAS). However, few quantitative trait loci (QTLs) have been used successfully in MAS for complex characteristics. Recent research shows the efficiency of genome-wide association studies (GWAS) for locating QTL regions in different populations. In this way, the integration of GWAS, RNA-sequencing (RNA-Seq) methodologies, coexpression networks and enzyme networks can …

Developing A Plan For A More Diverse, Inclusive, And Equitable Library At A Research 1 Land-Grant University, Jonathan S. Briganti, Brittany Dodson, Inga Haugen, Gail Mcmillan, Ronald Mecham, Andrea L. Ogier, Shannon Phillips, Anthony Wright De Hernandez

Library Diversity and Residency Studies

Using the Virginia Tech strategic plan as a guide, a team of its University Libraries faculty and staff designed a strategic planning approach for the library that directly engaged with University goals and explored two areas: 1) contributing to the equity-, diversity-, and inclusion-related (EDI) goals laid out in the University strategic plan, and 2) expanding upon efforts to broaden diversity and representation in the library. The team identified four major themes: accessibility, climate, employment and professional development, outreach, and advocacy, and used these themes to develop specific recommendations. The process served to shine the light on these topics within …

Better Collections, Better Communities, Anna Snider

Library Diversity and Residency Studies

This article explores a variety of topics and real-world case studies associated with building diversity in collections and the relationship of collection development to communities served. It explores what the ALA Library Bill of Rights has to say on these matters, and applies many of its admonitions to recent examples of censorship. The ALA Code of Ethics is also examined in the context of diversity in collection development.

Ethnic Diversity And Preferred Leadership Attributes: A Quantitative Analysis With Secondary Use Of Qualitative Data, Maha Kumaran, Keith Walker, Samson Wakibi

Library Diversity and Residency Studies

The broad diversity and leadership landscape in the Canadian academic librarianship was assessed using a survey. The survey was designed using REDCap. It was piloted, translated into French, tested again, and electronically distributed via REDCap to English and French-speaking librarians across Canadian academic institutions. This paper represents a secondary analysis of collected data to determine whether the ethnic backgrounds of librarians have any influence on what they view as the most or least essential attributes in a leader. Secondary use of data means using data for a different purpose (from what it was collected for), sometimes by the same researcher …

Using The Book How To Be An Antiracist In Library Dei Community Programs: Bringing Equity, Diversity, And Inclusion To The Community, Nakia Hoskins

Library Diversity and Residency Studies

This brief article provides an overview of a program in which the University of North Carolina at Greensboro library hosted a series of book club conversations about racism utilizing the book How to Be an Antiracist by Ibram X. Kendi. The article concludes with some observations and suggestions.

Ldrs V1 N2 Front Matter

Library Diversity and Residency Studies

No abstract provided.

Calamity And Resiliency: Reflections On The Past Two Years And Library Responses, Martin Halbert

Library Diversity and Residency Studies

This editorial introduces the second issue of Library Diversity and Residency Studies. It discusses the impacts of the COVID-19 pandemic and other recent phenomena, and how libraries can help support efforts to achieve resiliency in society. It also discusses future plans for the journal and invites contributions.

Droplet-Based Fuel Property Measurements, Wanjun Dang

LSU Doctoral Dissertations

Ongoing work to find renewable biofuels to function as drop-in replacements or blending components with gasoline has identified a large number of fuel candidates. Given the vast number of potential biomass-derived fuel molecules and limited sample sizes, screening tools are required to down-select candidate fuels having desired physical properties to ensure good engine performance. This work investigates approaches for rapid screening of candidate fuels using micro-liter sample sizes targeting four properties -- surface tension, viscosity, heat of vaporization (HOV), and vapor pressure. Measurement techniques for fuel properties are developed based on unit phenomena for liquid fuel droplets including droplet oscillation …

Evaluation Of Residual Herbicides Across Multiple Rice Production Systems, Lucas Connor Webster

LSU Doctoral Dissertations

A field study was conducted in 2019, 2020, and 2021 at the LSU Agricultural Center H. Rouse Caffey Rice Research Station (RRS) near Crowley, LA. to evaluate the crop safety and potential weed control of very long chain fatty acid (VLCFA) inhibiting herbicides in Louisiana rice production. The study evaluated the use of acetochlor, dimethenamid, s-metolachlor, and pyroxasulfone applied preemergence (PRE), delayed PRE (DPRE), and the two- to three- leaf, early postemergence (EPOST) rice growth stage. In general, rice injury decreased as application timing was delayed with the least amount of rice injury occurring when the VLCFA inhibiting herbicides were …

Black Students In Higher Education: An Identification Of Factors Predicting Academic Success, Franklin A. Soares

LSU Doctoral Dissertations

The quantitative study was an ex-post-facto study design to explore specific factors and their magnitude that predicts the successful matriculation toward and achievement of a bachelor’s degree by Black students enrolled at a PWI in the deep South. The researcher pursued to explore the direction and magnitude that fall into the following three categories on several measures the matriculation progress toward and deficit of a bachelor’s degree: student demographics characteristics, socio-economic background and economic status, and pre-and post-admission academic readiness and performance. The study was established on Tinto’s (1993) Model of Institutional Departure. Moreover, the study used binomial logistic regression, …

Functional Structure Of Biomacromolecules In Plant Biomass Using Solid-State Nmr And Dynamic Nuclear Polarization, Alex Kipchirchir Kirui

LSU Doctoral Dissertations

This dissertation summarizes the recent findings on complex biomacromolecules in cell wall of plants and fungi which perform important roles in cell recognition, structural build up, and energy storage. Because of the technical difficulty in characterizing these biomacromolecules, which are often polymorphic and disordered in structure, the functional structure of these biomacromolecules remains elusive. In this dissertation, I present two solid-state nuclear magnetic resonance (ssNMR) and dynamic nuclear polarization (DNP) studies of carbohydrate-rich biosystems: the energy-rich plant biomass and disease-relevant, pathogenic fungi.

First, we have investigated the secondary cell wall of plant biomass which is a carbohydrate-rich biosystem using solid …

Variedades. Second Edition. Intermediate/ Advanced Spanish Conversation, Carmela V. Mattza

Faculty Publications

VARIEDADES. Second Edition. Intermediate/ Advanced Spanish Conversation is a textbook for the student at the intermediate / advanced intermediate level. Through audiovisual activities, the student is expected to put their previous knowledge into practice and improve their ability to understand, write, listen, and speak in Spanish. VARIEDADES offers communicative activities that can be easily adapted into courses of different levels. In addition, it offers an appendix of activities with films and a Spanish grammar section that by subject directs the student to electronic databases that are freely accessible or are part of the Open Access platform.

Mutations In A Barley Cytochrome P450 Gene Enhances Pathogen Induced Programmed Cell Death And Cutin Layer Instability, Gazala Ameen, Shyam Solanki, Lauren Sager-Bittara, Jonathan Richards, Prabin Tamang, Timothy L. Friesen, Robert S. Brueggeman

Faculty Publications

Disease lesion mimic mutants (DLMMs) are characterized by the spontaneous development of necrotic spots with various phenotypes designated as necrotic (nec) mutants in barley. The nec mutants were traditionally considered to have aberrant regulation of programmed cell death (PCD) pathways, which have roles in plant immunity and development. Most barley nec3 mutants express cream to orange necrotic lesions contrasting them from typical spontaneous DLMMs that develop dark pigmented lesions indicative of serotonin/phenolics deposition. Barley nec3 mutants grown under sterile conditions did not exhibit necrotic phenotypes until inoculated with adapted pathogens, suggesting that they are not typical DLMMs. The F2 progeny …

A Novel Approach For Microscale Dry Contact Stiction And Friction Assessment: Experimentation And Analysis, Bin Zhang, Reza Namakian, Xiaoman Zhang, W. J. Meng, Jennifer Hay, Kurt Johanns

Faculty Publications

Accurate and quantitative evaluation of friction is of fundamental interest for materials science and manufacturing. Driven by the trend towards miniaturization, micro metal forming techniques with characteristic forming dimensions approaching a few microns have developed rapidly over the past two decades. In contrast, the assessment of microscale friction is lagging. Here, we present a novel test, compression molding and demolding test (CMDT), to assess stiction and friction at the microscale. CMDT was conducted via in-situ instrumented molding and demolding of an Al specimen with cylindrical tool steel and Ti alloy punches. High-rate data acquisition enabled direct measurements, for the first …

Phase Stability Of Novel Hfnbtativzr Refractory High Entropy Alloy Under Ion Irradiation, Jianren Zhou, Mark Kirk, Pete Baldo, Shengmin Guo, Fengyuan Lu

Faculty Publications

HfNbTaTiVZr refractory high entropy alloy (RHEA) fabricated by arc melting shows the single-phase body-centered cubic (BCC) structure. Radiation-induced amorphization (RIA) is observed at 2 displacements per atom (dpa) at 298 K while the specimen remains its crystal structure at 423 K. The critical amorphization temperature (Tc) is likely within 298–423 K. RIA is mainly attributed to the accumulation of Frenkel pairs caused by elastic collisions under ion irradiation and the large atomic size mismatch in the studied RHEA facilitates the amorphization process. RIA of RHEA is for the first time reported and the finding challenges the current understanding of phase …

Limits On Parameter Estimation Of Quantum Channels, Vishal Katariya

LSU Doctoral Dissertations

The aim of this thesis is to develop a theoretical framework to study parameter estimation of quantum channels. We begin by describing the classical task of parameter estimation that we build upon. In its most basic form, parameter estimation is the task of obtaining an estimate of an unknown parameter from some experimental data. This experimental data can be seen as a number of samples of a parameterized probability distribution. In general, the goal of such a task is to obtain an estimate of the unknown parameter while minimizing its error.

We study the task of estimating unknown parameters which …

Inductor Free Methods For Breaking Dc Currents, Sudipta Sen

LSU Doctoral Dissertations

The current interruption in dc circuits is more difficult to achieve compared to the ac circuits because, unlike ac systems, dc circuits do not have the natural current zero-crossing. Presently there are three categories of basic dc breaker models namely mechanical, static, and hybrid dc breakers. As current power systems is moving more towards microgrids, DERs, Electric Vehicles (EVs), and with recent advancements in dc circuits, wide verities of dc power sources, and loads, dc breakers are very important in future system protection.

New alternate methods to break dc currents for low-voltage applications are proposed in this work. The proposed …

An Intrinsic Proof Of An Extension Of Itô’S Isometry For Anticipating Stochastic Integrals, Hui-Hsiung Kuo, Pujan Shrestha, Sudip Sinha

Journal of Stochastic Analysis

No abstract provided.

First Record Of Fungal Diversity In The Tropical And Warm-Temperate Middle Miocene Climate Optimum Forests Of Eurasia, Ingrid C. Romero, Noelia B. Nuñez Otaño, Martha E. Gibson, Tyler M. Spears, C. Jolene Fairchild, Laikin Tarlton, Savannah Jones, Harvey E. Belkin, Sophie Warny, Matthew J. Pound, Jennifer M.K. O’Keefe

Faculty Publications

The middle Miocene Climate Optimum (MMCO) was the warmest interval of the last 23 million years and is one of the best analogs for proposed future climate change scenarios. Fungi play a key role in the terrestrial carbon cycle as dominant decomposers of plant debris, and through their interactions with plants and other organisms as symbionts, parasites, and endobionts. Thus, their study in the fossil record, especially during the MMCO, is essential to better understand biodiversity changes and terrestrial carbon cycle dynamics in past analogous environments, as well as to model future ecological and climatic scenarios. The fossil record also …

Preliminary Tests Of Dosimetric Quality And Projected Therapeutic Outcomes Of Multi-Phase 4d Radiotherapy With Proton And Carbon Ion Beams, Michelle Lis, Wayne Newhauser, Marco Donetti, Moritz Wolf, Timo Steinsberger, Athena Paz, Christian Graeff

Faculty Publications

Objective. The purpose of this study was to perform preliminary pre-clinical tests to compare the dosimetric quality of two approaches to treating moving tumors with ion beams: synchronously delivering the beam with the motion of a moving planning target volume (PTV) using the recently developed multi-phase 4D dose delivery (MP4D) approach, and asynchronously delivering the ion beam to a motion-encompassing internal tumor volume (ITV) combined with rescanning. Approach. We created 4D optimized treatment plans with proton and carbon ion beams for two patients who had previously received treatment for non-small cell lung cancer. For each patient, we created several treatment …

Point Absorber Limits To Future Gravitational-Wave Detectors, W X. Jia, H Yamamoto, K Kuns, A Effler, W X. Jia, P Fritschel, R Abbott, C Adams, R X. Adhikari, A Ananyeva, S Appert, K Arai, J S. Areeda, Y Asali, S M. Aston, C Austin, A Baer, M Ball, S W. Ballmer, S Banagiri, D Barker, L Barsotti, J Bartlett, B K. Berger, G Betzwieser, D Bhattacharjee, G Billingsley, S Biscans, C D. Blair, R M. Blair, N Bode, P Booker, R Bork, A Bramley

Faculty Publications

High-quality optical resonant cavities require low optical loss, typically on the scale of parts per million. However, unintended micron-scale contaminants on the resonator mirrors that absorb the light circulating in the cavity can deform the surface thermoelastically and thus increase losses by scattering light out of the resonant mode. The point absorber effect is a limiting factor in some high-power cavity experiments, for example, the Advanced LIGO gravitational-wave detector. In this Letter, we present a general approach to the point absorber effect from first principles and simulate its contribution to the increased scattering. The achievable circulating power in current and …

Gut Microbiota Composition And Predicted Microbial Metabolic Pathways Of Obesity Prone And Obesity Resistant Outbred Sprague-Dawley Cd Rats May Account For Differences In Their Phenotype, Diana N. Obanda, Michael J. Keenan, Ryan Page, Anne M. Raggio, Christopher M. Taylor, Brian D. Marx, Rhett W. Stout, Justin Guice, Meng Luo, David A. Welsh, Diana Coulon, Claudia Husseneder

Faculty Publications

Like humans, outbred Sprague-Dawley CD rats exhibit a polygenic pattern of inheritance of the obese phenotype and not all individuals exposed to a high calorie intake develop obesity. We hypothesized that differences in gut microbiota composition account for phenotype differences between obese prone (OP) and obese resistant (OR) rats. We studied the gut microbiota composition of OPand OR rats after a high fat (HF) diet and how they respond to fermentation of resistant starch (RS). In phase 1 of the study 28 OP and 28 OR rats were fed a HF diet. In order to determine causal role of microbiota …

Hypothalamic Steroid Receptor Coactivator-2 Regulates Adaptations To Fasting And Overnutrition, Yongjie Yang, Yanlin He, Hailan Liu, Wenjun Zhou, Chunmei Wang, Pingwen Xu, Xing Cai, Hesong Liu, Kaifan Yu, Zhou Pei, Ilirjana Hyseni, Makoto Fukuda, Qingchun Tong, Jianming Xu, Zheng Sun, Bert W. O'Malley, Yong Xu

Division of Basic Science Faculty Publications

The neuroendocrine system coordinates metabolic and behavioral adaptations to fasting, including reducing energy expenditure, promoting counterregulation, and suppressing satiation and anxiety to engage refeeding. Here, we show that steroid receptor coactivator-2 (SRC-2) in pro-opiomelanocortin (POMC) neurons is a key regulator of all these responses to fasting. POMC-specific deletion of SRC-2 enhances the basal excitability of POMC neurons; mutant mice fail to efficiently suppress energy expenditure during food deprivation. SRC-2 deficiency blunts electric responses of POMC neurons to glucose fluctuations, causing impaired counterregulation. When food becomes available, these mutant mice show insufficient refeeding associated with enhanced satiation and discoordination of anxiety …

A Morphological And Histological Investigation Of Imperfect Lungfish Fin Regeneration, Vivien Bothe, Igor Schneider, Nadia B. Fröbisch

Faculty Publications

Regeneration, the replacement of body parts in a living animal, has excited scientists for centuries and our knowledge of vertebrate appendage regeneration has increased significantly over the past decades. While the ability of amniotes to regenerate body parts is very limited, members of other vertebrate clades have been shown to have rather high regenerative capacities. Among tetrapods (four-limbed vertebrates), only salamanders show unparalleled capacities of epimorphic tissue regeneration including replacement of organ and body parts in an apparently perfect fashion. The closest living relatives of Tetrapoda, the lungfish, show regenerative abilities that are comparable to those of salamanders and recent …

Spatiotemporal Variability Of Fishery‐Dependent Indices For The Declining Louisiana Southern Flounder Fishery, David R. Smith, Michael A. Dance, Joe West, Stephen R. Midway

Faculty Publications

No abstract provided.

Body Size, Trophic Position, And The Coupling Of Different Energy Pathways Across A Saltmarsh Landscape, Friedrich W. Keppeler, Jill A. Olin, Paola C. López‐Duarte, Michael J. Polito, Linda M. Hooper‐Bùi, Sabrina S. Taylor, Nancy N. Rabalais, F. Joel Fodrie, Brian J. Roberts, R. Eugene Turner, Charles W. Martin, Olaf P. Jensen

Faculty Publications

No abstract provided.