Open Access. Powered by Scholars. Published by Universities.®

Digital Commons Network™

Open Access. Powered by Scholars. Published by Universities.®

Louisiana State University

Discipline
Keyword
Publication Year
Publication
Publication Type
File Type

Articles 4531 - 4560 of 45176

Full-Text Articles in Entire DC Network

Honey Bee Genetic Stock Determines Deformed Wing Virus Symptom Severity But Not Viral Load Or Dissemination Following Pupal Exposure, Hannah J. Penn, Michael D. Simone-Finstrom, Yanping Chen, Kristen B. Healy Jun 2022

Honey Bee Genetic Stock Determines Deformed Wing Virus Symptom Severity But Not Viral Load Or Dissemination Following Pupal Exposure, Hannah J. Penn, Michael D. Simone-Finstrom, Yanping Chen, Kristen B. Healy

Faculty Publications

Honey bees exposed to Varroa mites incur substantial physical damage in addition to potential exposure to vectored viruses such as Deformed wing virus (DWV) that exists as three master variants (DWV-A, DWV-B, and DWV-C) and recombinants. Although mite-resistant bees have been primarily bred to mitigate the impacts of Varroa mites, mite resistance may be associated with increased tolerance or resistance to the vectored viruses. The goal of our study is to determine if five honey bee stocks (Carniolan, Italian, Pol-Line, Russian, and Saskatraz) differ in their resistance or tolerance to DWV based on prior breeding for mite resistance. We injected …

Go to article

A Century-Long Trajectory Of Phosphorus Loading And Export From Mississippi River Basin To The Gulf Of Mexico: Contributions Of Multiple Environmental Changes, Zihao Bian, Shufen Pan, Zhuonan Wang, Yuanzhi Yao, Rongting Xu, Hao Shi, Latif Kalin, Christopher Anderson, Dubravko Justic, Steven Lohrenz, Hanqin Tian Jun 2022

A Century-Long Trajectory Of Phosphorus Loading And Export From Mississippi River Basin To The Gulf Of Mexico: Contributions Of Multiple Environmental Changes, Zihao Bian, Shufen Pan, Zhuonan Wang, Yuanzhi Yao, Rongting Xu, Hao Shi, Latif Kalin, Christopher Anderson, Dubravko Justic, Steven Lohrenz, Hanqin Tian

Faculty Publications

Phosphorus (P) control is critical to mitigating eutrophication in aquatic ecosystems, but the effectiveness of controlling P export from soils has been limited by our poor understanding of P dynamics along the land-ocean aquatic continuum as well as the lack of well-developed process models that effectively couple terrestrial and aquatic biogeochemical P processes. Here, we coupled riverine P biogeochemical processes and water transport with terrestrial processes within the framework of the Dynamic Land Ecosystem Model to assess how multiple environmental changes, including fertilizer and manure P uses, land use, climate, and atmospheric CO2, have affected the long-term dynamics of P …

Go to article

Governance Of Social Responsibility In International Infrastructure Megaprojects, Saixing Zeng, Hongquan Chen, Hanyang Ma, Jonathan Jingsheng Shi Jun 2022

Governance Of Social Responsibility In International Infrastructure Megaprojects, Saixing Zeng, Hongquan Chen, Hanyang Ma, Jonathan Jingsheng Shi

Faculty Publications

No abstract provided.

Go to article

Phylogenetic Characterization And Genome Sequence Analysis Of Burkholderia Glumae Strains Isolated In Thailand As The Causal Agent Of Rice Bacterial Panicle Blight, Nootjarin Jungkhun, Antonio Roberto Gomes De Farias, Jutatape Watcharachaiyakup, Nuttima Kositcharoenkul, Jong Hyun Ham, Sujin Patarapuwadol Jun 2022

Phylogenetic Characterization And Genome Sequence Analysis Of Burkholderia Glumae Strains Isolated In Thailand As The Causal Agent Of Rice Bacterial Panicle Blight, Nootjarin Jungkhun, Antonio Roberto Gomes De Farias, Jutatape Watcharachaiyakup, Nuttima Kositcharoenkul, Jong Hyun Ham, Sujin Patarapuwadol

Faculty Publications

Burkholderia glumae is one of the most critical rice-pathogenic bacteria, and it causes bacterial panicle blight (BPB) in rice plants. In 2017, BPB symptoms were observed from rice fields in Chiang Rai, Northern Thailand. Sixty-one isolates obtained from the symptomatic panicles of rice were initially identified as B. glumae by polymerase chain reaction (PCR) using species-specific primers. Among them, six selected strains isolated from the susceptible japonica rice cultivar DOA2 were characterized in terms of morpho-physiology, pathology, phylogenetics, and genomics. Our genome sequence analysis of the six selected strains revealed the presence of multiple prophages, which may reflect the high …

Go to article

Sweat (Summer, 2022), Lsu Swine Palace Jun 2022

Sweat (Summer, 2022), Lsu Swine Palace

Playbills

Filled with warm humor and tremendous heart, SWEAT tells the story of a group of friends who have spent their lives sharing drinks, secrets, and laughs while working together on the factory floor. But when layoffs and picket lines begin to chip away at their trust, the friends find themselves pitted against each other in a heart-wrenching fight to stay afloat.

Go to article

Sustainable Gardening For School And Home Gardens: Sweet Corn, Denyse Cummins, Carl Motsenbocker Jun 2022

Sustainable Gardening For School And Home Gardens: Sweet Corn, Denyse Cummins, Carl Motsenbocker

Sustainable Gardening for School and Home Gardens

Corn is a member of the Poaceae family, also known as the grass or cereal family, which includes wheat, oats, barley, rye, sugarcane and rice, as well as bamboo and many ornamentals, such as the lawn grasses. There are many types of corn that can be grown and used for human food although there are two major types: corn that is harvested when mature as a dried grain (field corn) and corn that is harvested immature as a vegetable referred to as sweet corn. Grain corn types include: popcorn, ornamental corn, flint corn, flour corn, waxy corn and dent corn. …

Go to article

Influence Of Weather On Gobbling Activity Of Male Wild Turkeys, Patrick H. Wightman, James A. Martin, John C. Kilgo, Emily Rushton, Bret A. Collier, Michael J. Chamberlain Jun 2022

Influence Of Weather On Gobbling Activity Of Male Wild Turkeys, Patrick H. Wightman, James A. Martin, John C. Kilgo, Emily Rushton, Bret A. Collier, Michael J. Chamberlain

Faculty Publications

Gobbling activity of Eastern wild turkeys (Meleagris gallopavo silvestris; hereafter, turkeys) has been widely studied, focusing on drivers of daily variation. Weather variables are widely believed to influence gobbling activity, but results across studies are contradictory and often equivocal, leading to uncertainty in the relative contribution of weather variables to daily fluctuations in gobbling activity. Previous works relied on road-based auditory surveys to collect gobbling data, which limits data consistency, duration, and quantity due to logistical difficulties associated with human observers and restricted sampling frames. Development of new methods using autonomous recording units (ARUs) allows researchers to collect continuous data …

Go to article

Recursive Movements Of Eastern Wild Turkey Broods In The Southeastern United States, Nicholas W. Bakner, Bradley S. Cohen, Bret A. Collier, Michael J. Chamberlain Jun 2022

Recursive Movements Of Eastern Wild Turkey Broods In The Southeastern United States, Nicholas W. Bakner, Bradley S. Cohen, Bret A. Collier, Michael J. Chamberlain

Faculty Publications

Productivity of wild turkey (Meleagris gallopavo) populations throughout the southeastern United States has declined over the past several decades. Although population trajectory is driven primarily by annual reproduction, wild turkey managers have little information regarding the behavioral ecology of broods immediately post-hatch. Broods are known to revisit areas within their ranges, but revisitation behavior is poorly understood spatially and temporally. Thus, identifying patterns of visitation and revisitation can increase understanding of brood behavior. We monitored 94 brooding females until brood failure or 28 days after hatch to evaluate movements and to quantify landcover and vegetation density at revisited locations which …

Go to article

The North American Freshwater Migratory Fish Database (Nafmfd): Characterizing The Migratory Life Histories Of Freshwater Fishes Of Canada, The United States And Mexico, Emily M. Dean, Arthur R. Cooper, Lizhu Wang, Wesley Daniel, Solomon David, Clayton Ernzen, Keith B. Gido, Edward Hale, Tim J. Haxton, William Kelso, Nancy Leonard, Chris Lido, Joseph Margraf, Michael Porter, Casey Pennock, David Propst, Jared Ross, Michelle D. Staudinger, Gary Whelan, Dana M. Infante Jun 2022

The North American Freshwater Migratory Fish Database (Nafmfd): Characterizing The Migratory Life Histories Of Freshwater Fishes Of Canada, The United States And Mexico, Emily M. Dean, Arthur R. Cooper, Lizhu Wang, Wesley Daniel, Solomon David, Clayton Ernzen, Keith B. Gido, Edward Hale, Tim J. Haxton, William Kelso, Nancy Leonard, Chris Lido, Joseph Margraf, Michael Porter, Casey Pennock, David Propst, Jared Ross, Michelle D. Staudinger, Gary Whelan, Dana M. Infante

Faculty Publications

Aim: Migratory freshwater fishes are those that must access discrete habitats to complete their life cycles. Freshwater fish migrations occur around the world and provide numerous ecosystem services for humans and natural systems; however, many migratory species are in decline globally. A limiting factor to successfully conserve freshwater migratory fishes is that the migratory life histories of many species are unknown or only partially described. To provide researchers with critical and comprehensive information to conserve migratory fishes, we developed the North American Freshwater Migratory Fish Database (NAFMFD). Location: Canada, Mexico and the United States. Taxon: Freshwater fish. Methods: To develop …

Go to article

Loss Of Function Of Renal Glut2 Reverses Hyperglycaemia And Normalises Body Weight In Mouse Models Of Diabetes And Obesity, Leticia Maria De Souza Cordeiro, Lauren Bainbridge, Nagavardhini Devisetty, David H. Mcdougal, Dorien J.M. Peters, Kavaljit H. Chhabra Jun 2022

Loss Of Function Of Renal Glut2 Reverses Hyperglycaemia And Normalises Body Weight In Mouse Models Of Diabetes And Obesity, Leticia Maria De Souza Cordeiro, Lauren Bainbridge, Nagavardhini Devisetty, David H. Mcdougal, Dorien J.M. Peters, Kavaljit H. Chhabra

Division of Basic Science Faculty Publications

Aims/hypothesis: Renal GLUT2 is increased in diabetes, thereby enhancing glucose reabsorption and worsening hyperglycaemia. Here, we determined whether loss of Glut2 (also known as Slc2a2) specifically in the kidneys would reverse hyperglycaemia and normalise body weight in mouse models of diabetes and obesity. Methods: We used the tamoxifen-inducible CreERT2-Lox system in mice to knockout Glut2 specifically in the kidneys (Ks-Glut2 KO) to establish the contribution of renal GLUT2 to systemic glucose homeostasis in health and in insulin-dependent as well as non-insulin-dependent diabetes. We measured circulating glucose and insulin levels in response to OGTT or IVGTT under different experimental conditions in …

Go to article

Natural History And Community Science Records Confirm Rapid Geographic Shifts In The Distribution Of Bachman’S Sparrow (Peucaea Aestivalis) Since 1850, Amie E. Settlecowski, Kathryn E.C. Davis, James A. Cox, Stefan Woltmann, Sabrina S. Taylor Jun 2022

Natural History And Community Science Records Confirm Rapid Geographic Shifts In The Distribution Of Bachman’S Sparrow (Peucaea Aestivalis) Since 1850, Amie E. Settlecowski, Kathryn E.C. Davis, James A. Cox, Stefan Woltmann, Sabrina S. Taylor

Faculty Publications

North American grassland birds colonized emerging habitat created by expanding agriculture in a pattern of eastward expansions from the mid-1800s to mid-1900s. These birds have been declining, since at least the mid-1900s, largely as result of anthropogenic landscape change. Only one bird that now breeds predominantly in southeastern pine savannas is thought to have experienced a concurrent range expansion into this region: Peucaea aestivalis (Bachman’s Sparrow). However, our understanding of the P. aestivalis expansion, and subsequent retraction to the southeastern United States, is largely based on a contemporaneous review of only a subset of historical records from beyond its modern, …

Go to article

Assessing The Initial Validity Of The Portionsize App To Estimate Dietary Intake Among Adults: Pilot And Feasibility App Validation Study, Sanjoy Saha, Chloe Panizza Lozano, Stephanie Broyles, Corby K. Martin, John W. Apolzan Jun 2022

Assessing The Initial Validity Of The Portionsize App To Estimate Dietary Intake Among Adults: Pilot And Feasibility App Validation Study, Sanjoy Saha, Chloe Panizza Lozano, Stephanie Broyles, Corby K. Martin, John W. Apolzan

Clinical Research Faculty Publications

Background: Accurately assessing dietary intake can promote improved nutrition. The PortionSize app (Pennington Biomedical Research Center) was designed to quantify and provide real-time feedback on the intake of energy, food groups, saturated fat, and added sugar. Objective: This study aimed to assess the preliminary feasibility and validity of estimating food intake via the PortionSize app among adults. Methods: A total of 15 adults (aged 18-65 years) were recruited and trained to quantify the food intake from a simulated meal by using PortionSize. Trained personnel prepared 15 simulated meals and covertly weighed (weigh back) the amount of food provided to participants …

Go to article

Interindividual Variation In Maximum Aerobic Metabolism Varies With Gill Morphology And Myocardial Bioenergetics In Gulf Killifish, Bernard B. Rees, Jessica E. Reemeyer, Brian A. Irving Jun 2022

Interindividual Variation In Maximum Aerobic Metabolism Varies With Gill Morphology And Myocardial Bioenergetics In Gulf Killifish, Bernard B. Rees, Jessica E. Reemeyer, Brian A. Irving

Faculty Publications

This study asked whether interindividual variation in maximum and standard aerobic metabolic rates of the Gulf killifish, Fundulus grandis, correlates with gill morphology and cardiac mitochondrial bioenergetics, traits reflecting critical steps in the O2 transport cascade from the environment to the tissues. Maximum metabolic rate (MMR) was positively related to body mass, total gill filament length and myocardial oxygen consumption during maximum oxidative phosphorylation (multiple R2=0.836). Standard metabolic rate (SMR) was positively related to body mass, total gill filament length and myocardial oxygen consumption during maximum electron transport system activity (multiple R2=0.717). After controlling for body mass, individuals with longer …

Go to article

Regional Human Resource Development In Asean: An Institutional Theory Perspective, Oleksandr Tkachenko, Oliver S. Crocco, Loi A. Nguyen, Victoria Jonathan Jun 2022

Regional Human Resource Development In Asean: An Institutional Theory Perspective, Oleksandr Tkachenko, Oliver S. Crocco, Loi A. Nguyen, Victoria Jonathan

Faculty Publications

With the growing influence of intergovernmental organizations such as the European Union and the Association of Southeast Asian Nations (ASEAN), the scope and complexity of human resource development (HRD) activities have expanded. Informed by an institutional theory perspective, we examined the evolution of HRD as well as HRD-related programs in ASEAN to illuminate the mechanisms and conditions shaping HRD in ASEAN. Our primary sources were archival data from ASEAN from 1967–2021 and relevant publications of international development agencies that feature HRD-related activities in the region. Our analysis suggests that the establishment of an intergovernmental organization (i.e., ASEAN), with its continuing …

Go to article

Mitochondrial Uncoupling Attenuates Sarcopenic Obesity By Enhancing Skeletal Muscle Mitophagy And Quality Control, Wagner S. Dantas, Elizabeth R.M. Zunica, Elizabeth C. Heintz, Bolormaa Vandanmagsar, Z. Elizabeth Floyd, Yongmei Yu, Hisashi Fujioka, Charles L. Hoppel, Kathryn P. Belmont, Christopher L. Axelrod, John P. Kirwan Jun 2022

Mitochondrial Uncoupling Attenuates Sarcopenic Obesity By Enhancing Skeletal Muscle Mitophagy And Quality Control, Wagner S. Dantas, Elizabeth R.M. Zunica, Elizabeth C. Heintz, Bolormaa Vandanmagsar, Z. Elizabeth Floyd, Yongmei Yu, Hisashi Fujioka, Charles L. Hoppel, Kathryn P. Belmont, Christopher L. Axelrod, John P. Kirwan

Division of Basic Science Faculty Publications

Background: Sarcopenic obesity is a highly prevalent disease with poor survival and ineffective medical interventions. Mitochondrial dysfunction is purported to be central in the pathogenesis of sarcopenic obesity by impairing both organelle biogenesis and quality control. We have previously identified that a mitochondrial-targeted furazano[3,4-b]pyrazine named BAM15 is orally available and selectively lowers respiratory coupling efficiency and protects against diet-induced obesity in mice. Here, we tested the hypothesis that mitochondrial uncoupling simultaneously attenuates loss of muscle function and weight gain in a mouse model of sarcopenic obesity. Methods: Eighty-week-old male C57BL/6J mice with obesity were randomized to 10 weeks of high …

Go to article

Comprehensive Analysis Of Epigenetic Clocks Reveals Associations Between Disproportionate Biological Ageing And Hippocampal Volume, Lidija Milicic, Michael Vacher, Tenielle Porter, Vincent Doré, Samantha C. Burnham, Pierrick Bourgeat, Rosita Shishegar, James Doecke, Nicola J. Armstrong, Rick Tankard, Paul Maruff, Colin L. Masters, Christopher C. Rowe, Victor L. Villemagne, Simon M. Laws, Balebail Ashok Raj, Kristin Fargher, Amanda Smith, Lisa Raudin, Gloria Chaing, Norman Relkin, Karen Elizabeth Smith, Hyungsub Shim, Laura L. Boles Ponto, Susan K. Schultz, Antero Sarrael, Raymundo Hernando, Nunzio Pomara, Dick Drost, Andrew Kertesz, John Rogers, Irina Rachinsky, Stephen Pasternak, Elizabether Finger Jun 2022

Comprehensive Analysis Of Epigenetic Clocks Reveals Associations Between Disproportionate Biological Ageing And Hippocampal Volume, Lidija Milicic, Michael Vacher, Tenielle Porter, Vincent Doré, Samantha C. Burnham, Pierrick Bourgeat, Rosita Shishegar, James Doecke, Nicola J. Armstrong, Rick Tankard, Paul Maruff, Colin L. Masters, Christopher C. Rowe, Victor L. Villemagne, Simon M. Laws, Balebail Ashok Raj, Kristin Fargher, Amanda Smith, Lisa Raudin, Gloria Chaing, Norman Relkin, Karen Elizabeth Smith, Hyungsub Shim, Laura L. Boles Ponto, Susan K. Schultz, Antero Sarrael, Raymundo Hernando, Nunzio Pomara, Dick Drost, Andrew Kertesz, John Rogers, Irina Rachinsky, Stephen Pasternak, Elizabether Finger

Clinical Research Faculty Publications

The concept of age acceleration, the difference between biological age and chronological age, is of growing interest, particularly with respect to age-related disorders, such as Alzheimer’s Disease (AD). Whilst studies have reported associations with AD risk and related phenotypes, there remains a lack of consensus on these associations. Here we aimed to comprehensively investigate the relationship between five recognised measures of age acceleration, based on DNA methylation patterns (DNAm age), and cross-sectional and longitudinal cognition and AD-related neuroimaging phenotypes (volumetric MRI and Amyloid-β PET) in the Australian Imaging, Biomarkers and Lifestyle (AIBL) and the Alzheimer’s Disease Neuroimaging Initiative (ADNI). Significant …

Go to article

More Than Rocks And Stone: Confederate Monuments, Memory Movements, And Race, Heather A. O'Connell Jun 2022

More Than Rocks And Stone: Confederate Monuments, Memory Movements, And Race, Heather A. O'Connell

Faculty Publications

Iexamine why Confederate monuments were built in public spaces in counties throughout the US South with particular attention to connections to race. I use event history analysis to examine the overall likelihood of erecting the first monument in a county while accounting for dimensions of time. The data include a comprehensive accounting of public Confederate monuments, covariates spanning 150 years, and several unique historical variables. This is the first study to assess competing explanations for the construction of Confederate monuments in a generalizable analysis. Results provide support for understanding Confederate monuments as part of a larger "memory movement."Moreover, this movement …

Go to article

Novel Approaches To Environmental Monitoring And Control Of Listeria Monocytogenes In Food Production Facilities, Priyanka Gupta, Achyut Adhikari Jun 2022

Novel Approaches To Environmental Monitoring And Control Of Listeria Monocytogenes In Food Production Facilities, Priyanka Gupta, Achyut Adhikari

Faculty Publications

Listeria monocytogenes is a serious public health hazard responsible for the foodborne illness listeriosis. L. monocytogenes is ubiquitous in nature and can become established in food production facilities, resulting in the contamination of a variety of food products, especially ready-to-eat foods. Effective and risk-based environmental monitoring programs and control strategies are essential to eliminate L. monocytogenes in food production environments. Key elements of the environmental monitoring program include (i) identifying the sources and prevalence of L. monocytogenes in the production environment, (ii) verifying the effectiveness of control measures to eliminate L. monocytogenes, and (iii) identifying the areas and activities to …

Go to article

Ab Initio Approaches To High-Entropy Alloys: A Comparison Of Cpa, Sqs, And Supercell Methods, Mariia Karabin, Wasim Raja Mondal, Andreas Östlin, Wai Ga D. Ho, Vladimir Dobrosavljevic, Ka Ming Tam, Hanna Terletska, Liviu Chioncel, Yang Wang, Markus Eisenbach Jun 2022

Ab Initio Approaches To High-Entropy Alloys: A Comparison Of Cpa, Sqs, And Supercell Methods, Mariia Karabin, Wasim Raja Mondal, Andreas Östlin, Wai Ga D. Ho, Vladimir Dobrosavljevic, Ka Ming Tam, Hanna Terletska, Liviu Chioncel, Yang Wang, Markus Eisenbach

Faculty Publications

We present a comparative study of different modeling approaches to the electronic properties of the Hf 0.05Nb 0.05Ta 0.8Ti 0.05Zr 0.05 high-entropy alloy. Common to our modeling is the methodology to compute the one-particle Green’s function in the framework of density functional theory. We demonstrate that the special quasi-random structures modeling and the supercell, i.e., the locally self-consistent multiple-scattering methods, provide very similar results for the ground state properties such as the spectral function (density of states) and the equilibrium lattice parameter. To reconcile the multiple-scattering single-site coherent potential approximation with the real space supercell methods, we included the effect …

Go to article

Feedback Stabilization And Robustness Analysis Using Bounds On Fundamental Matrices, Frederic Mazenc, Michael Malisoff Jun 2022

Feedback Stabilization And Robustness Analysis Using Bounds On Fundamental Matrices, Frederic Mazenc, Michael Malisoff

Faculty Publications

We prove a new robust stabilization theorem for time-varying systems that have sampled measurements and time-varying disturbances, and we provide new observer designs, using novel bounds for fundamental matrices for systems with disturbances. Our main tools use properties of Metzler matrices and positive systems.

Go to article

Toeplitz Operators On The Fock Space With Quasi-Radial Symbols, Vishwa Dewage, Gestur Ólafsson Jun 2022

Toeplitz Operators On The Fock Space With Quasi-Radial Symbols, Vishwa Dewage, Gestur Ólafsson

Faculty Publications

The Fock space F(Cn) is the space of holomorphic functions on Cn that are square-integrable with respect to the Gaussian measure on Cn. This space plays an important role in several subfields of analysis and representation theory. In particular, it has for a long time been a model to study Toeplitz operators. Esmeral and Maximenko showed in 2016 that radial Toeplitz operators on F(C) generate a commutative C∗-algebra which is isometrically isomorphic to the C∗-algebra Cb,u(N, ρ1). In this article, we extend the result to k-quasi-radial symbols acting on the Fock …

Go to article

Deciphering Nb 98 Ss Decay With The Modular Total Absorption Spectrometer At Ornl, B. C. Rasco, K. P. Rykaczewski, A. Fijalkowska, M. Karny, M. Wolinska-Cichocka, R. K. Grzywacz, D. W. Stracener, E. F. Zganjar, J. C. Batchelder, J. C. Blackmon, N. T. Brewer, M. P. Cooper, K. C. Goetz, J. W. Johnson, T. King, A. Laminack, J. T. Matta, K. Miernik, M. Madurga, D. Miller, M. M. Rajabali, T. Ruland, P. Shuai, M. Stepaniuk, J. Winger Jun 2022

Deciphering Nb 98 Ss Decay With The Modular Total Absorption Spectrometer At Ornl, B. C. Rasco, K. P. Rykaczewski, A. Fijalkowska, M. Karny, M. Wolinska-Cichocka, R. K. Grzywacz, D. W. Stracener, E. F. Zganjar, J. C. Batchelder, J. C. Blackmon, N. T. Brewer, M. P. Cooper, K. C. Goetz, J. W. Johnson, T. King, A. Laminack, J. T. Matta, K. Miernik, M. Madurga, D. Miller, M. M. Rajabali, T. Ruland, P. Shuai, M. Stepaniuk, J. Winger

Faculty Publications

Background: An assessment done under the auspices of the Organization for Economic Co-operation and Developement Nuclear Energy Agency (OECD-NEA) in 2007 suggested that the ß decays of many abundantly produced fission products in nuclear reactors may be incomplete. In this assessment, the fission product Nb98 was assigned the highest priority for study by total absorption spectroscopy due to its large cumulative fission branching fraction and because the ß-decay data from several experiments are discrepant. Purpose: To obtain the complete ß-decay feeding pattern of Nb98 and determine the impact on the average ? energy per Nb98ß decay and ?¯e emission calculations. …

Go to article

In Search Of Short Gamma-Ray Burst Optical Counterparts With The Zwicky Transient Facility, Tomás Ahumada, Shreya Anand, Michael W. Coughlin, Igor Andreoni, Erik C. Kool, Harsh Kumar, Simeon Reusch, Ana Sagués-Carracedo, Robert Stein, S. Bradley Cenko, Mansi M. Kasliwal, Leo P. Singer, Rachel Dunwoody, Joseph Mangan, Varun Bhalerao, Mattia Bulla, Eric Burns, Matthew J. Graham, David L. Kaplan, Daniel Perley, Mouza Almualla, Joshua S. Bloom, Virginia Cunningham, Kishalay De, Pradip Gatkine, Anna Y.Q. Ho, Viraj Karambelkar, Albert K.H. Kong, Yuhan Yao, G. C. Anupama, Sudhanshu Barway, Shaon Ghosh, Ryosuke Itoh Jun 2022

In Search Of Short Gamma-Ray Burst Optical Counterparts With The Zwicky Transient Facility, Tomás Ahumada, Shreya Anand, Michael W. Coughlin, Igor Andreoni, Erik C. Kool, Harsh Kumar, Simeon Reusch, Ana Sagués-Carracedo, Robert Stein, S. Bradley Cenko, Mansi M. Kasliwal, Leo P. Singer, Rachel Dunwoody, Joseph Mangan, Varun Bhalerao, Mattia Bulla, Eric Burns, Matthew J. Graham, David L. Kaplan, Daniel Perley, Mouza Almualla, Joshua S. Bloom, Virginia Cunningham, Kishalay De, Pradip Gatkine, Anna Y.Q. Ho, Viraj Karambelkar, Albert K.H. Kong, Yuhan Yao, G. C. Anupama, Sudhanshu Barway, Shaon Ghosh, Ryosuke Itoh

Faculty Publications

The Fermi Gamma-ray Burst Monitor (GBM) triggers on-board in response to ∼40 short gamma-ray bursts (SGRBs) per year; however, their large localization regions have made the search for optical counterparts a challenging endeavour. We have developed and executed an extensive program with the wide field of view of the Zwicky Transient Facility (ZTF) camera, mounted on the Palomar 48 inch Oschin telescope (P48), to perform target-of-opportunity (ToO) observations on 10 Fermi-GBM SGRBs during 2018 and 2020-2021. Bridging the large sky areas with small field-of-view optical telescopes in order to track the evolution of potential candidates, we look for the elusive …

Go to article

Multiresolution Healpix Maps For Multiwavelength And Multimessenger Astronomy, I. Martinez-Castellanos, Leo P. Singer, E. Burns, D. Tak, Alyson Joens, Judith L. Racusin, Jeremy S. Perkins Jun 2022

Multiresolution Healpix Maps For Multiwavelength And Multimessenger Astronomy, I. Martinez-Castellanos, Leo P. Singer, E. Burns, D. Tak, Alyson Joens, Judith L. Racusin, Jeremy S. Perkins

Faculty Publications

HEALPix - the Hierarchical Equal Area isoLatitude Pixelization - has become a standard in high-energy and gravitational wave astronomy. Originally developed to improve the efficiency of all-sky Fourier analyses, it is now also utilized to share sky localization information. When used for this purpose the need for a homogeneous all-sky grid represents a limitation that hinders a broader community adoption. This work presents mhealpy, a Python library able to create, handle and analyze multiresolution maps, a solution to this problem. It supports efficient pixel querying, arithmetic operations between maps, adaptive mesh refinement, plotting, and serialization into FITS - Flexible Image …

Go to article

Passive Laser Power Stabilization Via An Optical Spring, Torrey Cullen, Scott Aronson, Ron Pagano, Marina Trad Nery, Henry Cain, Jonathon Cripe, Garrett D. Cole, Safura Sharifi, Nancy Aggarwal, Benno Willke, Thomas Corbitt Jun 2022

Passive Laser Power Stabilization Via An Optical Spring, Torrey Cullen, Scott Aronson, Ron Pagano, Marina Trad Nery, Henry Cain, Jonathon Cripe, Garrett D. Cole, Safura Sharifi, Nancy Aggarwal, Benno Willke, Thomas Corbitt

Faculty Publications

Metrology experiments can be limited by the noise produced by the laser involved via small fluctuations in the laser’s power or frequency. Typically, active power stabilization schemes consisting of an in-loop sensor and a feedback control loop are employed. Those schemes are fundamentally limited by shot noise coupling at the in-loop sensor. In this Letter, we propose to use the optical spring effect to passively stabilize the classical power fluctuations of a laser beam. In a proof of principle experiment, we show that the relative power noise of the laser is stabilized from approximately 2 × 10−5 Hz−1 …

Go to article

Thinking Outside The Box: Numerical Relativity With Particles, Stephan Rosswog, Peter Diener, Francesco Torsello Jun 2022

Thinking Outside The Box: Numerical Relativity With Particles, Stephan Rosswog, Peter Diener, Francesco Torsello

Faculty Publications

The observation of gravitational waves from compact objects has now become an active part of observational astronomy. For a sound interpretation, one needs to compare such observations against detailed Numerical Relativity simulations, which are essential tools to explore the dynamics and physics of compact binary mergers. To date, essentially all simulation codes that solve the full set of Einstein’s equations are performed in the framework of Eulerian hydrodynamics. The exception is our recently developed Numerical Relativity code SPHINCS_BSSN which solves the commonly used BSSN formulation of the Einstein equations on a structured mesh and the matter equations via Lagrangian particles. …

Go to article

Evolutionary Relationships Of Anglerfishes (Lophiiformes) Reconstructed Using Ultraconserved Elements, Pamela B. Hart, Rachel J. Arnold, Fernando Alda, Christopher P. Kenaley, Theodore W. Pietsch, Destinee Hutchinson, Prosanta Chakrabarty Jun 2022

Evolutionary Relationships Of Anglerfishes (Lophiiformes) Reconstructed Using Ultraconserved Elements, Pamela B. Hart, Rachel J. Arnold, Fernando Alda, Christopher P. Kenaley, Theodore W. Pietsch, Destinee Hutchinson, Prosanta Chakrabarty

Faculty Publications

The macroevolutionary consequences of evolving in the deep-sea remain poorly understood and are compounded by the fact that convergent adaptations for living in this environment makes elucidating phylogenetic relationships difficult. Lophiiform anglerfishes exhibit extreme habitat and predatory specializations, including the use of a fin-spine system as a luring device and unique reproductive strategies where parasitic males attach and fuse to females. Despite their notoriety for these odd characteristics, evolutionary relationships among these fishes remain unclear. We sought to clarify the evolutionary history of Lophiiformes using data from 1000 ultraconserved elements and phylogenomic inference methods with particular interest paid to the …

Go to article

Multiscale Finite Element Methods For An Elliptic Optimal Control Problem With Rough Coefficients, Susanne C. Brenner, José C. Garay, Li Yeng Sung Jun 2022

Multiscale Finite Element Methods For An Elliptic Optimal Control Problem With Rough Coefficients, Susanne C. Brenner, José C. Garay, Li Yeng Sung

Faculty Publications

We investigate multiscale finite element methods for an elliptic distributed optimal control problem with rough coefficients. They are based on the (local) orthogonal decomposition methodology of Målqvist and Peterseim.

Go to article

Genetic Variation Among The Salinity Tolerant Breeding Lines Identified From Two Multi-Parent Advanced Generation Introgression Line Populations In Rice (Oryza Sativa), Sandeep Chapagain, Jonathan Concepcion, Rajat Pruthi, Lovepreet Singh, Adam Famoso, Prasant K. Subudhi Jun 2022

Genetic Variation Among The Salinity Tolerant Breeding Lines Identified From Two Multi-Parent Advanced Generation Introgression Line Populations In Rice (Oryza Sativa), Sandeep Chapagain, Jonathan Concepcion, Rajat Pruthi, Lovepreet Singh, Adam Famoso, Prasant K. Subudhi

Faculty Publications

Salinity is a major environmental constraint affecting rice production in both irrigated and non-irrigated areas and threatening global food security. Development of salt-tolerant rice varieties with desirable agronomic traits is a logical approach to maintain high yield in saline areas. Here, we report development of two multi-parent advanced generation introgression line (MAGIL) rice populations in two US cultivar backgrounds and their physiological and morphological evaluation under salinity stress at germination and seedling stages. From the initial screening of 180 MAGILs in sand culture, 36 tolerant-to-moderately salt-tolerant lines were selected and further confirmed in hydroponics experiment. The selected MAGILs showed lower …

Go to article

Covid-19 Prevention Behaviors In A Cooperative Extension Audience: Findings From A Nutrition Education Study, Matthew Greene, Catherine Ruth Losavio, Denise Holston Jun 2022

Covid-19 Prevention Behaviors In A Cooperative Extension Audience: Findings From A Nutrition Education Study, Matthew Greene, Catherine Ruth Losavio, Denise Holston

Faculty Publications

The COVID-19 pandemic has dramatically impacted the delivery of nutrition education through Cooperative Extension. This study aimed to identify a Cooperative Extension audience’s attitudes towards virus prevention behaviors, preferred sources of information regarding COVID-19, and nutrition education preferences during the pandemic. We distributed an online survey to 477 potential nutrition education participants including questions about behaviors like mask wearing, preferences for virtual nutrition lesson delivery, and attitudes towards sources of information about COVID-19. Attitudes towards mask wearing and preferred sources of information differed significantly by race, income, and age. These differences have serious implications for future outreach and program delivery

Go to article

First Prev Next Last