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The Role Of Magnetar Transient Activity In Time-Domain And Multimessenger Astronomy, Michela Negro, George Younes, Zorawar Wadiasingh, Eric Burns, Aaron Trigg, Matthew Baring Jan 2024

The Role Of Magnetar Transient Activity In Time-Domain And Multimessenger Astronomy, Michela Negro, George Younes, Zorawar Wadiasingh, Eric Burns, Aaron Trigg, Matthew Baring

Faculty Publications

Time-domain and multimessenger astronomy (TDAMM) involves the study of transient and time-variable phenomena across various wavelengths and messengers. The Astro2020 Decadal Survey has identified TDAMM as the top priority for NASA in this decade, emphasizing its crucial role in advancing our understanding of the universe and driving new discoveries in astrophysics. The TDAMM community has come together to provide further guidance to funding agencies, aiming to define a clear path toward optimizing scientific returns in this research domain. This encompasses not only astronomy but also fundamental physics, offering insights into properties of gravity, the formation of heavy elements, the equation …

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Torsion Invariants Of Complexes Of Groups, Boris Okun, Kevin Schreve Jan 2024

Torsion Invariants Of Complexes Of Groups, Boris Okun, Kevin Schreve

Faculty Publications

Suppose a residually finite group G acts cocompactly on a contractible complex with strict fundamental domain Q, where the stabilizers are either trivial or have normal \BbbZ-subgroups. Let @Q be the subcomplex of Q with nontrivial stabilizers. Our main result is a computation of the homology torsion growth of a chain of finite index normal subgroups of G. We show that independent of the chain, the normalized torsion limits to the torsion of @Q shifted a degree. Under milder assumptions of acyclicity of nontrivial stabilizers, we show similar formulas for the mod p-homology growth. We also obtain formulas for the …

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Efficacious Qubit Mappings For Quantum Simulations Of The 12c Rotational Band, Darin C. Mumma, Zhonghao Sun, Alexis Mercenne, Kristina D. Launey, Soorya Rethinasamy, James A. Sauls Jan 2024

Efficacious Qubit Mappings For Quantum Simulations Of The 12c Rotational Band, Darin C. Mumma, Zhonghao Sun, Alexis Mercenne, Kristina D. Launey, Soorya Rethinasamy, James A. Sauls

Faculty Publications

Solving atomic nuclei from first principles places enormous demands on computational resources, which grow exponentially with increasing number of particles and the size of the space they occupy. We present first quantum simulations based on the variational quantum eigensolver for the low-lying structure of the 12C nucleus that provide acceptable bound-state energies even in the presence of noise. We achieve this by taking advantage of two critical developments. First, we utilize an almost perfect symmetry of atomic nuclei that, in a complete symmetry-adapted basis, drastically reduces the size of the model space. Second, we use the efficacious Gray encoding, …

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The Future Of Attosecond Science, Nirit Dudovich, Li Fang, Mette Gaarde, Ursula Keller, Alexandra Landsman, Maria Richter, Nina Rohringer, Linda Young Jan 2024

The Future Of Attosecond Science, Nirit Dudovich, Li Fang, Mette Gaarde, Ursula Keller, Alexandra Landsman, Maria Richter, Nina Rohringer, Linda Young

Faculty Publications

Conferences are incredible opportunities to strengthen the inclusive outlook of our scientific community. The participation of female scientists, postdocs, and graduate students in the ATTO VIII conference was remarkable, with more than 40% of female invited speakers. The Local Organizing Committee seized this opportunity to promote an atmosphere that welcomes all. An entirely female evening panel, with experience across the attosecond science spectrum, was convened to explore the Future of Attosecond Science in the evening session of Wednesday, July 13. Furthermore, a booklet entitled Perspectives in Attosecond Science was compiled by Dr. Shima Gholam-Mirzaei of the University of Ottawa and …

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Local Enhancement In Transient Absorption Spectroscopy By Gating The Resonance In The Time Domain, Yu He, Christian Ott, Thomas Pfeifer, Mette B. Gaarde Jan 2024

Local Enhancement In Transient Absorption Spectroscopy By Gating The Resonance In The Time Domain, Yu He, Christian Ott, Thomas Pfeifer, Mette B. Gaarde

Faculty Publications

The concept of resonant perfect absorption, enabled by the combined action of pulse propagation and an auxiliary gate pulse, was recently proposed and demonstrated in a group of two-level systems [Y. He, Phys. Rev. Lett. 129, 273201 (2022)0031-900710.1103/PhysRevLett.129.273201]. Here we exploit this method in a more realistic scenario by solving the coupled time-dependent Schrödinger equation and the Maxwell wave equation in helium. Through emptying the population of the 1s2p excited state after its excitation, we explore the evolution of the spectral profile with time delay and propagation distance and link the observations to the controlled interference between the original field …

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A Focus On Motivation, Summary Of Focus Group Findings Asking Educators For Insights On Means To Improve Student Motivation In Math, Nathaniel Armour, Alyssa Spears, H. Colleen Sinclair, Judith L. F. Rhodes Jan 2024

A Focus On Motivation, Summary Of Focus Group Findings Asking Educators For Insights On Means To Improve Student Motivation In Math, Nathaniel Armour, Alyssa Spears, H. Colleen Sinclair, Judith L. F. Rhodes

Reports

The research team at the LSU Social Research and Evaluation Center of Excellence in the LSU College of Human Sciences and Education conducted six focus groups with educators in the East Baton Rouge Parish School System (EBRPSS) in the summer of 2024. During the focus group sessions, we shared with participants some of our findings from the Math Mind Measure (MMM) survey administered to 5th to 8th grade EBRPSS students in the 2023-2024 school year. The survey asked about student motivations affecting their ideas about math. We found that some of the 10 different types of motivation measured by the …

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Ab Initio Translationally Invariant Nucleon-Nucleus Optical Potentials, M. Burrows, K. D. Launey, A. Mercenne, R. B. Baker, G. H. Sargsyan, T. Dytrych, D. Langr Jan 2024

Ab Initio Translationally Invariant Nucleon-Nucleus Optical Potentials, M. Burrows, K. D. Launey, A. Mercenne, R. B. Baker, G. H. Sargsyan, T. Dytrych, D. Langr

Faculty Publications

We combine the ab initio symmetry-adapted no-core shell model (SA-NCSM) with the single-particle Green's function approach to construct optical potentials rooted in first principles. Specifically, we show that total cross sections and phase shifts for neutron elastic scattering from a He4 target with projectile energies between 0.5 and 10 MeV closely reproduce the experiment. In addition, we discuss an important new development that resolves a long-standing issue with spurious center-of-mass motion in the Green's function formalism for many-body approaches. The new development opens a path for first-principle predictions of cross sections for elastic scattering of single-nucleon projectiles, nucleon capture, and …

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The Beta-Decay Paul Trap Mk Iv: Design And Commissioning, L. Varriano, G. Savard, J. A. Clark, D. P. Burdette, M. T. Burkey, A. T. Gallant, T. Y. Hirsh, B. Longfellow, N. D. Scielzo, R. Segel, E. J. Boron, M. Brodeur, N. Callahan, A. Cannon, K. Kolos, B. Liu, S. Lopez-Caceres, M. Gott, B. Maaß, S. T. Marley, C. Mohs, G. E. Morgan, P. Mueller, M. Oberling, P. D. O'Malley, W. S. Porter, Z. Purcell, D. Ray, F. Rivero, A. A. Valverde, G. L. Wilson, R. Zite Jan 2024

The Beta-Decay Paul Trap Mk Iv: Design And Commissioning, L. Varriano, G. Savard, J. A. Clark, D. P. Burdette, M. T. Burkey, A. T. Gallant, T. Y. Hirsh, B. Longfellow, N. D. Scielzo, R. Segel, E. J. Boron, M. Brodeur, N. Callahan, A. Cannon, K. Kolos, B. Liu, S. Lopez-Caceres, M. Gott, B. Maaß, S. T. Marley, C. Mohs, G. E. Morgan, P. Mueller, M. Oberling, P. D. O'Malley, W. S. Porter, Z. Purcell, D. Ray, F. Rivero, A. A. Valverde, G. L. Wilson, R. Zite

Faculty Publications

The Beta-decay Paul Trap is an open-geometry, linear trap used to measure the decays of 8Li and 8B to search for a tensor contribution to the weak interaction. In the latest 8Li measurement of Burkey et al. (2022), β scattering was the dominant experimental systematic uncertainty. The Beta-decay Paul Trap Mk IV reduces the prevalence of β scattering by a factor of 4 through a redesigned electrode geometry and the use of glassy carbon and graphite as electrode materials. The trap has been constructed and successfully commissioned with 8Li in a new data campaign that collected …

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A Multi-Shell Extension Of The Interacting Boson Model, Feng Pan, Yu Zhang, Lianrong Dai, Jerry P. Draayer, David Kekejian Jan 2024

A Multi-Shell Extension Of The Interacting Boson Model, Feng Pan, Yu Zhang, Lianrong Dai, Jerry P. Draayer, David Kekejian

Faculty Publications

A multi-shell extension of the simplest formulation of the interacting boson model that appends parity-conserving (2ħω) energy excitations to the non-extended theory is proffered. From a physical perspective this extension links the system's low-lying configurations to higher-lying multiple one-particle-one-hole (1p-1h) excitation modes that are in part tethered to the system's isoscalar giant monopole and quadrupole resonances. An application of the theory to low-lying energy levels and known B(E0) and B(E2) values of 152Sm shows that the results obtained with the extension are better than those without the extension.

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The Imaging X-Ray Polarimetry Explorer 2.5 Years Later, Paolo Soffitta, Luca Baldini, Wayne Baumgartner, Ronaldo Bellazzini, Stephen D. Bongiorno, Niccolò Bucciantini, Enrico Costa, Michal Dovčiak, Steven Ehlert, Philip E. Kaaret, Jeffery J. Kolodziejczak, Luca Latronico, Frédréic Marin, Alan P. Marscher, Herman L. Marshall, Giorgio Matt, Fabio Muleri, Stephen L. O'Dell, Juri Poutanen, Brian Ramsey, Roger W. Romani, Patrick Slane, Allyn F. Tennant, Roberto Turolla, Martin C. Weisskopf, Iván Agudo, Lucio Angelo Antonelli, Matteo Bachetti, Stefano Bianchi, Raffaella Bonino, Alessandro Brez, Fiamma Capitanio, Simone Castellano Jan 2024

The Imaging X-Ray Polarimetry Explorer 2.5 Years Later, Paolo Soffitta, Luca Baldini, Wayne Baumgartner, Ronaldo Bellazzini, Stephen D. Bongiorno, Niccolò Bucciantini, Enrico Costa, Michal Dovčiak, Steven Ehlert, Philip E. Kaaret, Jeffery J. Kolodziejczak, Luca Latronico, Frédréic Marin, Alan P. Marscher, Herman L. Marshall, Giorgio Matt, Fabio Muleri, Stephen L. O'Dell, Juri Poutanen, Brian Ramsey, Roger W. Romani, Patrick Slane, Allyn F. Tennant, Roberto Turolla, Martin C. Weisskopf, Iván Agudo, Lucio Angelo Antonelli, Matteo Bachetti, Stefano Bianchi, Raffaella Bonino, Alessandro Brez, Fiamma Capitanio, Simone Castellano

Faculty Publications

We have, at last, an observatory dedicated to X-ray polarimetry that has been operational since December 9th, 2021. The Imaging X-ray Polarimetry Explorer (IXPE) is a NASA SMEX mission, in partnership with ASI, based on three X-ray telescopes, each equipped with a polarization-sensitive detector in the focus. An extending boom was deployed in orbit, positioning the detectors at the optimal distance from the optics, which have a 4-meter focal length. The spacecraft is three-axis stabilized, providing power, attitude determination and control, transmission, and commanding capabilities. After two and a half years of observation, IXPE has detected positive polarization …

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X-Ray Polarization Of The Eastern Lobe Of Ss 433, Philip Kaaret, Riccardo Ferrazzoli, Stefano Silvestri, Michela Negro, Alberto Manfreda, Kinwah Wu, Enrico Costa, Paolo Soffitta, Samar Safi-Harb, Juri Poutanen, Alexandra Veledina, Alessandro Di Marco, Patrick Slane, Stefano Bianchi, Adam Ingram, Roger W. Romani, Nicolò Cibrario, Brydyn Mac Intyre, Romana Mikus̆Incová, Ajay Ratheesh, James F. Steiner, Jiri Svoboda, Stefano Tugliani, Iván Agudo, Lucio A. Antonelli, Matteo Bachetti, Luca Baldini, Wayne H. Baumgartner, Ronaldo Bellazzini, Stephen D. Bongiorno, Raffaella Bonino, Alessandro Brez, Niccolò Bucciantini Jan 2024

X-Ray Polarization Of The Eastern Lobe Of Ss 433, Philip Kaaret, Riccardo Ferrazzoli, Stefano Silvestri, Michela Negro, Alberto Manfreda, Kinwah Wu, Enrico Costa, Paolo Soffitta, Samar Safi-Harb, Juri Poutanen, Alexandra Veledina, Alessandro Di Marco, Patrick Slane, Stefano Bianchi, Adam Ingram, Roger W. Romani, Nicolò Cibrario, Brydyn Mac Intyre, Romana Mikus̆Incová, Ajay Ratheesh, James F. Steiner, Jiri Svoboda, Stefano Tugliani, Iván Agudo, Lucio A. Antonelli, Matteo Bachetti, Luca Baldini, Wayne H. Baumgartner, Ronaldo Bellazzini, Stephen D. Bongiorno, Raffaella Bonino, Alessandro Brez, Niccolò Bucciantini

Faculty Publications

How astrophysical systems translate the kinetic energy of bulk motion into the acceleration of particles to very high energies is a pressing question. SS 433 is a microquasar that emits TeV γ-rays indicating the presence of high-energy particles. A region of hard X-ray emission in the eastern lobe of SS 433 was recently identified as an acceleration site. We observed this region with the Imaging X-ray Polarimetry Explorer and measured a polarization degree in the range 38%-77%. The high polarization degree indicates the magnetic field has a well-ordered component if the X-rays are due to synchrotron emission. The polarization angle …

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The African Light Source: History, Context And Future, Simon H. Connell, Kathleen Dollman, Gihan Kamel, Sameen A. Khan, Edward Mitchell, Sekazi K. Mtingwa, Marcus C. Newton, Prosper Ngabonziza, Emmanuel Nji, Lawrence Norris, Michele Zema Jan 2024

The African Light Source: History, Context And Future, Simon H. Connell, Kathleen Dollman, Gihan Kamel, Sameen A. Khan, Edward Mitchell, Sekazi K. Mtingwa, Marcus C. Newton, Prosper Ngabonziza, Emmanuel Nji, Lawrence Norris, Michele Zema

Faculty Publications

The African Light Source (AfLS) project is now almost eight years old. This article assesses the history, current context and future of the project. There is by now considerable momentum in building the user community, including deep training, facilitating access to current facilities, growing the scientific output, scientific networks and growing the local laboratory-scale research infrastructure. The Conceptual Design Report for the AfLS is in its final editing stages. This document specifies the socio-economic and scientific rationales and the technical aspects amongst others. The AfLS is supported by many national and Pan-African scientific professional bodies and voluntary associates across many …

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Editorial: Disorder And Superconductivity: A 21st-Century Update, Ruslan Prozorov, James Avery Sauls, Peter Hirschfeld, Nigel E. Hussey, Maria Iavarone Jan 2024

Editorial: Disorder And Superconductivity: A 21st-Century Update, Ruslan Prozorov, James Avery Sauls, Peter Hirschfeld, Nigel E. Hussey, Maria Iavarone

Faculty Publications

No abstract provided.

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Iron–Sulfur Cluster Assembly Scaffold Protein Iscu Is Required For Activation Of Ferric Uptake Regulator (Fur) In Escherichia Coli, Huangen Ding Jan 2024

Iron–Sulfur Cluster Assembly Scaffold Protein Iscu Is Required For Activation Of Ferric Uptake Regulator (Fur) In Escherichia Coli, Huangen Ding

Faculty Publications

No abstract provided.

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Disentangling Historical Relationships Within Poeciliidae (Teleostei: Cyprinodontiformes) Using Ultraconserved Elements, Sheila Rodríguez-Machado, Diego J. Elías, Caleb D. Mcmahan, Anna Gruszkiewicz-Tolli, Kyle R. Piller, Prosanta Chakrabarty Jan 2024

Disentangling Historical Relationships Within Poeciliidae (Teleostei: Cyprinodontiformes) Using Ultraconserved Elements, Sheila Rodríguez-Machado, Diego J. Elías, Caleb D. Mcmahan, Anna Gruszkiewicz-Tolli, Kyle R. Piller, Prosanta Chakrabarty

Faculty Publications

Poeciliids (Cyprinodontiformes: Poeciliidae), commonly known as livebearers, are popular fishes in the aquarium trade (e.g., guppies, mollies, swordtails) that are widely distributed in the Americas, with 274 valid species in 27 genera. This group has undergone various taxonomic changes recently, spurred by investigations using traditional genetic markers. Here we used over 1,000 ultraconserved loci to infer the relationships within Poeciliidae in the first attempt at understanding their diversification based on genome-scale data. We explore gene tree discordance and investigate potential incongruence between concatenation and coalescent inference methods. Our aim is to examine the influence of incomplete lineage sorting and reticulate …

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New Records Of Seahorses (Teleostei: Syngnathidae: Hippocampus) From Kuwait In The Arabian (Persian) Gulf, James M. Bishop, Manickam Nithyanandan, A. J. Turner, Link Morgan, Prosanta Chakrabarty Jan 2024

New Records Of Seahorses (Teleostei: Syngnathidae: Hippocampus) From Kuwait In The Arabian (Persian) Gulf, James M. Bishop, Manickam Nithyanandan, A. J. Turner, Link Morgan, Prosanta Chakrabarty

Faculty Publications

A single species of seahorse, Hippocampus kuda, has been reported from the Arabian/Persian Gulf. Anatomical and DNA analyses of specimens from Kuwait indicate a second species occurs in the northern Gulf, and based on available specimens, may be the most prevalent species in the region. Evidence indicates the species to be H. trimaculatus and represents a range extension from India’s Gulf of Kutch of 2,600 km. DNA analysis of additional specimens is encouraged, particularly of H. trimaculatus specimens from outside the Gulf.

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A Nonlinear Least-Squares Convexity Enforcing C0 Interior Penalty Method For The Monge–Ampère Equation On Strictly Convex Smooth Planar Domains, Susanne C. Brenner, Li Yeng Sung, Zhiyu Tan, Hongchao Zhang Jan 2024

A Nonlinear Least-Squares Convexity Enforcing C0 Interior Penalty Method For The Monge–Ampère Equation On Strictly Convex Smooth Planar Domains, Susanne C. Brenner, Li Yeng Sung, Zhiyu Tan, Hongchao Zhang

Faculty Publications

We construct a nonlinear least-squares finite element method for com­puting the smooth convex solutions of the Dirichlet boundary value problem of the Monge-Ampère equation on strictly convex smooth domains in R2. It is based on an isoparametric C0 finite element space with exotic degrees of freedom that can enforce the convexity of the approximate solutions. A priori and a posteriori error estimates together with corroborating numerical results are presented.

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Right-Angled Artin Subgroups Of Right-Angled Coxeter And Artin Groups, Pallavi Dani, Ivan Levcovitz Jan 2024

Right-Angled Artin Subgroups Of Right-Angled Coxeter And Artin Groups, Pallavi Dani, Ivan Levcovitz

Faculty Publications

We determine when certain natural classes of subgroups of right-angled Coxeter groups (RACGs) and right-angled Artin groups (RAAGs) are themselves RAAGs. We characterize finite-index visual RAAG subgroups of 2–dimensional RACGs. As an application, we show that any 2–dimensional, one-ended RACG with planar defining graph is quasi-isometric to a RAAG if and only if it is commensurable to a RAAG. Additionally, we give new examples of RACGs with nonplanar defining graphs which are commensurable to RAAGs. Finally, we give a new proof of a result of Dyer: every subgroup generated by conjugates of RAAG generators is itself a RAAG.

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Editorial: Rising Stars In Systems Neuroscience: 2022, Mazyar Fallah, Juhee Haam, Ada Ledonne Jan 2024

Editorial: Rising Stars In Systems Neuroscience: 2022, Mazyar Fallah, Juhee Haam, Ada Ledonne

Faculty Publications

No abstract provided.

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Oxphos Capacity Is Diminished And The Phosphorylation System Inhibited During Diapause In An Extremophile, Embryos Of Artemia Franciscana, Yuvraj N. Patil, Erich Gnaiger, Alexander P. Landry, Zachary J. Leno, Steven C. Hand Jan 2024

Oxphos Capacity Is Diminished And The Phosphorylation System Inhibited During Diapause In An Extremophile, Embryos Of Artemia Franciscana, Yuvraj N. Patil, Erich Gnaiger, Alexander P. Landry, Zachary J. Leno, Steven C. Hand

Faculty Publications

Diapause exhibited by embryos of Artemia franciscana is accompanied by severe arrest of respiration. A large fraction of this depression is attributable to downregulation of trehalose catabolism that ultimately restricts fuel to mitochondria. This study now extends knowledge on the mechanism by revealing metabolic depression is heightened by inhibitions within mitochondria. Compared with that in embryo lysates during post-diapause, oxidative phosphorylation (OXPHOS) capacity P is depressed during diapause when either NADH-linked substrates (pyruvate and malate) for electron transfer (electron transfer capacity, E) through respiratory Complex I or the Complex II substrate succinate are used. When pyruvate, malate and succinate were …

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Phosphatidic Acid Produced By Phospholipase Dα1 And Dδ Is Incorporated Into The Internal Membranes But Not Involved In The Gene Expression Of Rd29a In The Abscisic Acid Signaling Network In Arabidopsis Thaliana, Ruth Ndathe, Naohiro Kato Jan 2024

Phosphatidic Acid Produced By Phospholipase Dα1 And Dδ Is Incorporated Into The Internal Membranes But Not Involved In The Gene Expression Of Rd29a In The Abscisic Acid Signaling Network In Arabidopsis Thaliana, Ruth Ndathe, Naohiro Kato

Faculty Publications

Core protein components of the abscisic acid (ABA) signaling network, pyrabactin resistance (PYR), protein phosphatases 2C (PP2C), and SNF1-related protein kinase 2 (SnRK2) are involved in the regulation of stomatal closure and gene expression downstream responses in Arabidopsis thaliana. Phosphatidic acid (PA) produced by the phospholipases Dα1 and Dδ (PLDs) in the plasma membrane has been identified as a necessary molecule in ABA-inducible stomatal closure. On the other hand, the involvement of PA in ABA-inducible gene expression has been suggested but remains a question. In this study, the involvement of PA in the ABA-inducible gene expression was examined in the …

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Transcriptomic Responses To Hypoxia In Two Populations Of Eastern Oyster With Differing Tolerance, Emma L. Crable, Heather Rodriguez, Rujuta V. Vaidya, Nicholas Coxe, Jerome F. La Peyre, Morgan W. Kelly Jan 2024

Transcriptomic Responses To Hypoxia In Two Populations Of Eastern Oyster With Differing Tolerance, Emma L. Crable, Heather Rodriguez, Rujuta V. Vaidya, Nicholas Coxe, Jerome F. La Peyre, Morgan W. Kelly

Faculty Publications

The eastern oyster, Crassostrea virginica, is a keystone species native to the Gulf of Mexico and Atlantic coasts of the United States and Canada. It provides habitat for other marine organisms and makes up the majority of oyster production in the United States. Despite its tolerance to hypoxic conditions, C. virginica is threatened by anthropogenic climate change, which is increasing both average temperature and the frequency and severity of hypoxic events. In this study, we explore the differences in hypoxia-transcriptional response between two populations of eastern oysters with known differences in hypoxia tolerance at three time points over the course …

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Conformational Changes In A Photosystem Ii Hydrogen Bond Network Stabilize The Oxygen-Evolving Complex, Brandon P. Russell, David J. Vinyard Jan 2024

Conformational Changes In A Photosystem Ii Hydrogen Bond Network Stabilize The Oxygen-Evolving Complex, Brandon P. Russell, David J. Vinyard

Faculty Publications

The Mn4CaO5 oxygen-evolving complex (OEC) in Photosystem II (PSII) is assembled in situ and catalyzes water oxidation. After OEC assembly, the PsbO extrinsic subunit docks to the lumenal face of PSII and both stabilizes the OEC and facilitates efficient proton transfer to the lumen. D1 residue R334 is part of a hydrogen bond network involved in proton release during catalysis and interacts directly with PsbO. D1-R334 has recently been observed in different conformations in apo- and holo-OEC PSII structures. We generated a D1-R334G point mutant in Synechocystis sp. PCC 6803 to better understand this residue's function. D1-R334G PSII is active …

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Lsu Fall Facts, 2024, Lsu Office Of Data & Strategic Analytics Jan 2024

Lsu Fall Facts, 2024, Lsu Office Of Data & Strategic Analytics

Fall Facts

No abstract provided.

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Deep Purple – An Open-Pollinated Variety To Induce Haploids In Tropical Maize, Roberto Fritsche-Neto, Felipe Sabadin, Evellyn Giselly De Oliveira Couto, Pedro Henrique De Souza, Filipe Couto Alves, Giovanni Galli, Ronaldo Borsato Junior, Julio Cesar Dovale, Karina Lima Reis Borges, Deoclécio Domingos Garbuglio Jan 2024

Deep Purple – An Open-Pollinated Variety To Induce Haploids In Tropical Maize, Roberto Fritsche-Neto, Felipe Sabadin, Evellyn Giselly De Oliveira Couto, Pedro Henrique De Souza, Filipe Couto Alves, Giovanni Galli, Ronaldo Borsato Junior, Julio Cesar Dovale, Karina Lima Reis Borges, Deoclécio Domingos Garbuglio

Faculty Publications

Deep purple is an open-pollinated variety, well adapted to tropical conditions, developed to induce maternal haploids in maize. The founders were W23, Stock6, and an experimental tropical maize population. The inducer population inherits the dominant the R1-nj marker, and the expected real haploid induction rate is 3%.

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Improving Hybrid Rice Breeding Programs Via Stochastic Simulations: Number Of Parents, Number Of Hybrids, Tester Update, And Genomic Prediction Of Hybrid Performance, Roberto Fritsche-Neto, Jauhar Ali, Erik Jon De Asis, Mehrzad Allahgholipour, Marlee Rose Labroo Jan 2024

Improving Hybrid Rice Breeding Programs Via Stochastic Simulations: Number Of Parents, Number Of Hybrids, Tester Update, And Genomic Prediction Of Hybrid Performance, Roberto Fritsche-Neto, Jauhar Ali, Erik Jon De Asis, Mehrzad Allahgholipour, Marlee Rose Labroo

Faculty Publications

Key message: Schemes that use genomic prediction outperform others, updating testers increases hybrid genetic gain, and larger population sizes tend to have higher genetic gain and less depletion of genetic variance Abstract: One of the most common methods to improve hybrid performance is reciprocal recurrent selection (RRS). Genomic prediction (GP) can be used to increase genetic gain in RRS by reducing cycle length, but it is also possible to use GP to predict single-cross hybrid performance. The impact of the latter method on genetic gain has yet to be previously reported. Therefore, we compared via stochastic simulations various phenotypic and …

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Feature Engineering Of Environmental Covariates Improves Plant Genomic-Enabled Prediction, Osval A. Montesinos-López, Leonardo Crespo-Herrera, Carolina Saint Pierre, Bernabe Cano-Paez, Gloria Isabel Huerta-Prado, Brandon Alejandro Mosqueda-González, Sofia Ramos-Pulido, Guillermo Gerard, Khalid Alnowibet, Roberto Fritsche-Neto, Abelardo Montesinos-López, José Crossa Jan 2024

Feature Engineering Of Environmental Covariates Improves Plant Genomic-Enabled Prediction, Osval A. Montesinos-López, Leonardo Crespo-Herrera, Carolina Saint Pierre, Bernabe Cano-Paez, Gloria Isabel Huerta-Prado, Brandon Alejandro Mosqueda-González, Sofia Ramos-Pulido, Guillermo Gerard, Khalid Alnowibet, Roberto Fritsche-Neto, Abelardo Montesinos-López, José Crossa

Faculty Publications

Introduction: Because Genomic selection (GS) is a predictive methodology, it needs to guarantee high-prediction accuracies for practical implementations. However, since many factors affect the prediction performance of this methodology, its practical implementation still needs to be improved in many breeding programs. For this reason, many strategies have been explored to improve the prediction performance of this methodology. Methods: When environmental covariates are incorporated as inputs in the genomic prediction models, this information only sometimes helps increase prediction performance. For this reason, this investigation explores the use of feature engineering on the environmental covariates to enhance the prediction performance of genomic …

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Teaching Difficult Topics: Reflections From The Undergraduate Music Classroom, Olivia R. Lucas, Laura Moore Pruett Jan 2024

Teaching Difficult Topics: Reflections From The Undergraduate Music Classroom, Olivia R. Lucas, Laura Moore Pruett

Faculty Publications

Teaching Difficult Topics provides a series of on-the-ground reflections from college music instructors working in a wide variety of institutional settings about their approaches to inclusive, supportive pedagogy in the music classroom. Although some imagine the music classroom to be an apolitical space, instructors find themselves increasingly in need of resources for incorporating issues of race and ethnicity, gender and sexuality, and historical trauma into their classrooms in ways that support student learning and safeguard their classroom communities. The teaching reflections in Teaching Difficult Topics examine difficult themes that fall into three primary categories: subjects that instructors sense to be …

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Ba5sb8: The Highest Homologue Of The Family Of Binary Semiconducting Barium Antimonides Bansb2n−2 (N ≥ 2), S. M.Gayomi K. Samarakoon, Alexander Ovchinnikov, Sviatoslav Baranets, Svilen Bobev Jan 2024

Ba5sb8: The Highest Homologue Of The Family Of Binary Semiconducting Barium Antimonides Bansb2n−2 (N ≥ 2), S. M.Gayomi K. Samarakoon, Alexander Ovchinnikov, Sviatoslav Baranets, Svilen Bobev

Faculty Publications

A novel binary compound within the Ba–Sb phase diagram, Ba5Sb8, was synthesized by combining elements with an excess of Sb in an alumina crucible. Structural elucidation was performed using single-crystal X-ray diffraction. This compound crystallizes in the orthorhombic space group Fdd2 with unit cell parameters of a = 15.6568(13) Å, b = 35.240(3) Å, c = 6.8189(6) Å, adopting its own structure type. The most distinctive features of the structure are the eight-membered [Sb8]10− polyanionic fragments which have no known precedents among antimonides. They are separated by five Ba2+ cations, which afford the charge balance and enable adherence …

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Enriched Molecular-Level View Of Saline Wetland Soil Carbon By Sensitivity-Enhanced Solid-State Nmr, Wancheng Zhao, Elizabeth C. Thomas, Debkumar Debnath, Faith J. Scott, Frederic Mentink-Vigier, John R. White, Robert L. Cook, Tuo Wang Jan 2024

Enriched Molecular-Level View Of Saline Wetland Soil Carbon By Sensitivity-Enhanced Solid-State Nmr, Wancheng Zhao, Elizabeth C. Thomas, Debkumar Debnath, Faith J. Scott, Frederic Mentink-Vigier, John R. White, Robert L. Cook, Tuo Wang

Faculty Publications

Soil organic matter (SOM) plays a major role in mitigating greenhouse gas emission and regulating earth’s climate, carbon cycle, and biodiversity. Wetland soils account for one-third of all SOM; however, globally, coastal wetland soils are eroding faster due to increasing sea-level rise. Our understanding of carbon sequestration dynamics in wetlands lags behind that of upland soils. Here, we employ solid-state nuclear magnetic resonance (ssNMR) to investigate the molecular-level structure of biopolymers in wetland soils spanning 11 centuries. High-resolution multidimensional spectra, enabled by dynamic nuclear polarization (DNP), demonstrate enduring preservation of molecular structures within herbaceous plant cores, notably condensing aromatic motifs …

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