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 6181 - 6210 of 45176

Full-Text Articles in Entire DC Network

Effects Of Age, Phase Variation And Pheromones On Male Sperm Storage In The Desert Locust, Schistocerca Gregaria, Satoshi Hiroyoshi, Takayuki Mitsunaga, Tomoko Ganaha-Kikumura, Gadi V.P. Reddy Jul 2021

Effects Of Age, Phase Variation And Pheromones On Male Sperm Storage In The Desert Locust, Schistocerca Gregaria, Satoshi Hiroyoshi, Takayuki Mitsunaga, Tomoko Ganaha-Kikumura, Gadi V.P. Reddy

Faculty Publications

In general, sperm produced in the testis are moved into the seminal vesicle via the vas deferens in insects, where they are stored. How this sperm movement is controlled is less well understood in locusts or grasshoppers. In this study, the effects of age, phase variation and pheromones on male sperm storage were investigated in the desert locust, Schistocerca gregaria (Forskål). In this locust, a pair of ducts, the vasa deferentia, connect the testes to a pair of the long, slender seminal vesicles that are folded approximately thirty times, and where the sperm are stored. We found that phase variation …

Go to article

"Super Gzk" Particles In A Classic Kramers' Diffusion-Over-A-Barrier Model. I. The Case Of Protons, S. T. Alnussirat, A. F. Barghouty, G. M. Webb, P. L. Biermann Jul 2021

"Super Gzk" Particles In A Classic Kramers' Diffusion-Over-A-Barrier Model. I. The Case Of Protons, S. T. Alnussirat, A. F. Barghouty, G. M. Webb, P. L. Biermann

Faculty Publications

In interactions of ultra-high-energy cosmic ray (UHECR) protons with cosmic microwave background photons, we focus in this work on photopion production reactions and the effects of the measured, broad, energy-loss distributions in these reactions on the evolution of the protons' density functions in energy space. We rely on a Fokker-Planck transport equation in energy space whose transport coefficients are calculated using laboratory measurements. We also derive a Fokker-Planck potential that accounts for both systematic (drift) and stochastic (dispersive) energy losses due to photopion production reactions. Our results show that dispersive energy losses have significant effects on estimating the protons' horizon …

Go to article

Relating Dust Reference Models To Conventional Systems In Manifestly Gauge Invariant Perturbation Theory, Kristina Giesel, Bao-Fei Li, Parampreet Singh Jul 2021

Relating Dust Reference Models To Conventional Systems In Manifestly Gauge Invariant Perturbation Theory, Kristina Giesel, Bao-Fei Li, Parampreet Singh

Faculty Publications

Models with dust reference fields in relational formalism have proved useful in understanding the construction of gauge invariant perturbation theory to arbitrary orders in the canonical framework. These reference fields modify the dynamical equations for perturbation equations. However, important questions remain open on the relation with conventional perturbation theories of inflaton coupled to gravity and of multifluid systems, and on understanding modifications in terms of physical degrees of freedom. These gaps are filled in this manuscript for Brown-Kuchar and Gaussian dust models, both of which involve three scalar physical degrees of freedom. We establish a relationship of these models with …

Go to article

Octo-Tiger: A New, 3d Hydrodynamic Code For Stellar Mergers That Uses Hpx Parallelization, Dominic C. Marcello, Sagiv Shiber, Orsola De Marco, Juhan Frank, Geoffrey C. Clayton, Patrick M. Motl, Patrick Diehl, Hartmut Kaiser Jul 2021

Octo-Tiger: A New, 3d Hydrodynamic Code For Stellar Mergers That Uses Hpx Parallelization, Dominic C. Marcello, Sagiv Shiber, Orsola De Marco, Juhan Frank, Geoffrey C. Clayton, Patrick M. Motl, Patrick Diehl, Hartmut Kaiser

Faculty Publications

OCTO-TIGER is an astrophysics code to simulate the evolution of self-gravitating and rotating systems of arbitrary geometry based on the fast multipole method, using adaptive mesh refinement. OCTO-TIGER is currently optimized to simulate the merger of well-resolved stars that can be approximated by barotropic structures, such as white dwarfs (WDs) or main-sequence stars. The gravity solver conserves angular momentum to machine precision, thanks to a 'correction' algorithm. This code uses firx parallelization, allowing the overlap of work and communication and leading to excellent scaling properties, allowing for the computation of large problems in reasonable wall-clock times. In this paper, we …

Go to article

The Fourier Transform Of Thick Distributions, Ricardo Estrada, Jasson Vindas, Yunyun Yang Jul 2021

The Fourier Transform Of Thick Distributions, Ricardo Estrada, Jasson Vindas, Yunyun Yang

Faculty Publications

We first construct a space (cn) whose elements are test functions defined in cn = n {∞}, the one point compactification of n, that have a thick expansion at infinity of special logarithmic type, and its dual space ′(cn), the space of sl-thick distributions. We show that there is a canonical projection of ′(cn) onto ′(n). We study several sl-thick distributions and consider operations in ′(cn). We define and study the Fourier transform of thick test functions of (n) and thick tempered distributions of ′(n). We construct isomorphisms : ′(n) →′(cn), : ′(cn) → ′(n), that extend the Fourier transform …

Go to article

Environmental Noise In Advanced Ligo Detectors, P. Nguyen, R. M.S. Schofield, A. Effler, C. Austin, V. Adya, M. Ball, S. Banagiri, K. Banowetz, C. Billman, C. D. Blair, A. Buikema, C. Cahillane, F. Clara, P. B. Covas, G. Dalya, C. Daniel, B. Dawes, R. Derosa, S. E. Dwyer, R. Frey, V. V. Frolov, D. Ghirado, E. Goetz, T. Hardwick, A. F. Helmling-Cornell, I. J. Hollows, N. Kijbunchoo, J. Kruk, M. Laxen, E. Maaske, G. L. Mansell, R. Mccarthy, K. Merfeld, A. Neunzert, J. R. Palamos, W. Parker, B. Pearlstone, A. Pele, H. Radkins, V. Roma, R. L. Savage, P. Schale, D. Shoemaker, T. Shoemaker, S. Soni, D. Talukder, M. Tse, G. Valdes, M. Vidreo, C. Vorvick, R. Abbott, C. Adams, R. X. Adhikari, A. Ananyeva, S. Appert, K. Arai, J. S. Areeda, Y. Asali, S. M. Aston, A. M. Baer, S. W. Ballmer, D. Barker, L. Barsotti, J. Bartlett, B. K. Berger, J. Betzwieser, D. Bhattacharjee, G. Billingsley, S. Biscans, R. M. Blair, N. Bode, P. Booker, R. Bork, A. Bramley, A. F. Brooks, D. D. Brown, K. C. Cannon, X. Chen, A. A. Ciobanu, S. J. Cooper, C. M. Compton, K. R. Corley, S. T. Countryman, D. C. Coyne, L. E. H. Datrier, D. Davis, C. Di Fronzo, K. L. Dooley, J. C. Driggers, P. Dupej, T. Etzel, M. Evans, T. M. Evans, J. Feicht, A. Fernandez-Galiana, P. Fritschel, P. Fulda, M. Fyffe, J. A. Giaime, K. D. Giardina, P. Godwin, S. Gras, C. Gray, R. Gray, A. C. Green, E. K. Gustafson, R. Gustafson, J. Hanks, J. Hanson, R. H. Hasskew, M. C. Heintze, N. A. Holland, J. D. Jones, S. Kandhasamy, S. Karki, M. Kasparzack, K. Kawabe, P. J. King, J. S. Kissel, R. Kumar, M. Landry, B. B. Lane, B. Lantz, Y. K. Lecoeuche, J. Leviton, J. Liu, M. Lormand, A. P. Lundgren, R. Macas, M. Macinnis, D. M. Macleod, S. Marka, Z. Marka, D. V. Martynov, K. Mason, T. J. Massinger, F. Matichard, N. Mavalvala, D. E. Mcclelland, S. Mccormick, L. Mcculler, J. Mciver, T. Mcrae, G. Mendell, E. L. Merilh, F. Meylahn, P. M. Meyers, T. Mistry, R. Mitteman, G. Moreno, C. M. Mow-Lowry, S. Mozzon, A. Mullavey, T. J. N. Nelson, L. K. Nuttall, J. Oberling, R. J. Oram, C. Osthelder, D. J. Ottaway, H. Overmier, E. Payne, R. Penhorwood, C. J. Perez, M. Pirello, K. E. Ramirez, J. W. Richardson, K. Riles, N. A. Robertson, J. G. Rollins, C. L. Romel, J. H. Romie, M. P. Ross, K. Ryan, T. Sadecki, E. J. Sanchez, L. E. Sanchez, T. R. Saravanan, D. Schaetzl, R. Schnabel, E. Schwartz, D. Sellers, T. Shaffer, D. Sigg, B. J. J. Slagmolen, J. R. Smith, B. Sorazu, A. P. Spencer, K. A. Strain, L. Sun, M. J. Szczepanczyk, M. Thomas, P. Thomas, K. A. Thorne, K. Toland, C. I. Torrie, G. Traylor, A. L. Urban, G. Vajente, D. C. Bander-Hyde, P. J. Veitch, K. Venkateswara, G. Venugopalan, A. D. Viets, T. Vo, M. Wade, R. L. Ward, J. Warner, B. Weaver, R. Weiss, C. Whittle, B. Willke, C. C. Wipf, L. Xiao, H. Yamamoto, H. Yu, L. Zhang, M. E. Zucker, J. Zweizig Jul 2021

Environmental Noise In Advanced Ligo Detectors, P. Nguyen, R. M.S. Schofield, A. Effler, C. Austin, V. Adya, M. Ball, S. Banagiri, K. Banowetz, C. Billman, C. D. Blair, A. Buikema, C. Cahillane, F. Clara, P. B. Covas, G. Dalya, C. Daniel, B. Dawes, R. Derosa, S. E. Dwyer, R. Frey, V. V. Frolov, D. Ghirado, E. Goetz, T. Hardwick, A. F. Helmling-Cornell, I. J. Hollows, N. Kijbunchoo, J. Kruk, M. Laxen, E. Maaske, G. L. Mansell, R. Mccarthy, K. Merfeld, A. Neunzert, J. R. Palamos, W. Parker, B. Pearlstone, A. Pele, H. Radkins, V. Roma, R. L. Savage, P. Schale, D. Shoemaker, T. Shoemaker, S. Soni, D. Talukder, M. Tse, G. Valdes, M. Vidreo, C. Vorvick, R. Abbott, C. Adams, R. X. Adhikari, A. Ananyeva, S. Appert, K. Arai, J. S. Areeda, Y. Asali, S. M. Aston, A. M. Baer, S. W. Ballmer, D. Barker, L. Barsotti, J. Bartlett, B. K. Berger, J. Betzwieser, D. Bhattacharjee, G. Billingsley, S. Biscans, R. M. Blair, N. Bode, P. Booker, R. Bork, A. Bramley, A. F. Brooks, D. D. Brown, K. C. Cannon, X. Chen, A. A. Ciobanu, S. J. Cooper, C. M. Compton, K. R. Corley, S. T. Countryman, D. C. Coyne, L. E. H. Datrier, D. Davis, C. Di Fronzo, K. L. Dooley, J. C. Driggers, P. Dupej, T. Etzel, M. Evans, T. M. Evans, J. Feicht, A. Fernandez-Galiana, P. Fritschel, P. Fulda, M. Fyffe, J. A. Giaime, K. D. Giardina, P. Godwin, S. Gras, C. Gray, R. Gray, A. C. Green, E. K. Gustafson, R. Gustafson, J. Hanks, J. Hanson, R. H. Hasskew, M. C. Heintze, N. A. Holland, J. D. Jones, S. Kandhasamy, S. Karki, M. Kasparzack, K. Kawabe, P. J. King, J. S. Kissel, R. Kumar, M. Landry, B. B. Lane, B. Lantz, Y. K. Lecoeuche, J. Leviton, J. Liu, M. Lormand, A. P. Lundgren, R. Macas, M. Macinnis, D. M. Macleod, S. Marka, Z. Marka, D. V. Martynov, K. Mason, T. J. Massinger, F. Matichard, N. Mavalvala, D. E. Mcclelland, S. Mccormick, L. Mcculler, J. Mciver, T. Mcrae, G. Mendell, E. L. Merilh, F. Meylahn, P. M. Meyers, T. Mistry, R. Mitteman, G. Moreno, C. M. Mow-Lowry, S. Mozzon, A. Mullavey, T. J. N. Nelson, L. K. Nuttall, J. Oberling, R. J. Oram, C. Osthelder, D. J. Ottaway, H. Overmier, E. Payne, R. Penhorwood, C. J. Perez, M. Pirello, K. E. Ramirez, J. W. Richardson, K. Riles, N. A. Robertson, J. G. Rollins, C. L. Romel, J. H. Romie, M. P. Ross, K. Ryan, T. Sadecki, E. J. Sanchez, L. E. Sanchez, T. R. Saravanan, D. Schaetzl, R. Schnabel, E. Schwartz, D. Sellers, T. Shaffer, D. Sigg, B. J. J. Slagmolen, J. R. Smith, B. Sorazu, A. P. Spencer, K. A. Strain, L. Sun, M. J. Szczepanczyk, M. Thomas, P. Thomas, K. A. Thorne, K. Toland, C. I. Torrie, G. Traylor, A. L. Urban, G. Vajente, D. C. Bander-Hyde, P. J. Veitch, K. Venkateswara, G. Venugopalan, A. D. Viets, T. Vo, M. Wade, R. L. Ward, J. Warner, B. Weaver, R. Weiss, C. Whittle, B. Willke, C. C. Wipf, L. Xiao, H. Yamamoto, H. Yu, L. Zhang, M. E. Zucker, J. Zweizig

Faculty Publications

The sensitivity of the advanced LIGO detectors to gravitational waves can be affected by environmental disturbances external to the detectors themselves. Since the transition from the former initial LIGO phase, many improvements have been made to the equipment and techniques used to investigate these environmental effects. These methods have aided in tracking down and mitigating noise sources throughout the first three observing runs of the advanced detector era, keeping the ambient contribution of environmental noise below the background noise levels of the detectors. In this paper we describe the methods used and how they have led to the mitigation of …

Go to article

Author Correction: Rev-Erb In Gabaergic Neurons Controls Diurnal Hepatic Insulin Sensitivity (Nature, (2021), 592, 7856, (763-767), 10.1038/S41586-021-03358-W), Guolian Ding, Xin Li, Xinguo Hou, Wenjun Zhou, Yingyun Gong, Fuqiang Liu, Yanlin He, Jia Song, Jing Wang, Paul Basil, Wenbo Li, Sichong Qian, Pradip Saha, Jinbang Wang, Chen Cui, Tingting Yang, Kexin Zou, Younghun Han, Christopher I. Amos, Yong Xu, Li Chen, Zheng Sun Jul 2021

Author Correction: Rev-Erb In Gabaergic Neurons Controls Diurnal Hepatic Insulin Sensitivity (Nature, (2021), 592, 7856, (763-767), 10.1038/S41586-021-03358-W), Guolian Ding, Xin Li, Xinguo Hou, Wenjun Zhou, Yingyun Gong, Fuqiang Liu, Yanlin He, Jia Song, Jing Wang, Paul Basil, Wenbo Li, Sichong Qian, Pradip Saha, Jinbang Wang, Chen Cui, Tingting Yang, Kexin Zou, Younghun Han, Christopher I. Amos, Yong Xu, Li Chen, Zheng Sun

Division of Basic Science Faculty Publications

No abstract provided.

Go to article

Reciprocal Control Of Obesity And Anxiety–Depressive Disorder Via A Gaba And Serotonin Neural Circuit, Guobin Xia, Yong Han, Fantao Meng, Yanlin He, Dollada Srisai, Monica Farias, Minghao Dang, Richard D. Palmiter, Yong Xu, Qi Wu Jul 2021

Reciprocal Control Of Obesity And Anxiety–Depressive Disorder Via A Gaba And Serotonin Neural Circuit, Guobin Xia, Yong Han, Fantao Meng, Yanlin He, Dollada Srisai, Monica Farias, Minghao Dang, Richard D. Palmiter, Yong Xu, Qi Wu

Division of Basic Science Faculty Publications

The high comorbidity between obesity and mental disorders, such as depression and anxiety, often exacerbates metabolic and neurological symptoms significantly. However, neural mechanisms that underlie reciprocal control of feeding and mental states are largely elusive. Here we report that melanocortin 4 receptor (MC4R) neurons located in the dorsal bed nucleus of the stria terminus (dBNST) engage in the regulation of mentally associated weight gain by receiving GABAergic projections from hypothalamic AgRP neurons onto α5-containing GABAA receptors and serotonergic afferents onto 5-HT3 receptors. Chronic treatment with a high-fat diet (HFD) significantly blunts the hyperexcitability of AgRP neurons in response to not …

Go to article

Breeding Ecology Of Mottled Ducks: A Review, Elizabeth S. Bonczek, Kevin M. Ringelman Jul 2021

Breeding Ecology Of Mottled Ducks: A Review, Elizabeth S. Bonczek, Kevin M. Ringelman

Faculty Publications

Mottled ducks (Anas fulvigula) are endemic to the Gulf Coast of North America, and their range stretches from Alabama to the Laguna Madre of Mexico, with a distinct population in peninsular Florida and an introduced population in South Carolina. As one of the few non-migratory ducks in North America, mottled ducks depend on a variety of locally available habitat throughout the annual cycle, and threats to these landscapes may affect mottled ducks more acutely than migratory species. Annual population monitoring has revealed declines in mottled duck populations in Texas and Louisiana since 2008, and the genetic integrity of the Florida …

Go to article

Stable Isotope Analyses Identify Trophic Niche Partitioning Between Sympatric Terrestrial Vertebrates In Coastal Saltmarshes With Differing Oiling Histories, Sydney Moyo, Hayat Bennadji, Danielle Laguaite, Anna A. Pérez-Umphrey, Allison M. Snider, Andrea Bonisoli-Alquati, Jill A. Olin, Philip C. Stouffer, Sabrina S. Taylor, Paola C. López-Duarte, Brian J. Roberts, Linda Hooper-Bui, Michael J. Polito Jul 2021

Stable Isotope Analyses Identify Trophic Niche Partitioning Between Sympatric Terrestrial Vertebrates In Coastal Saltmarshes With Differing Oiling Histories, Sydney Moyo, Hayat Bennadji, Danielle Laguaite, Anna A. Pérez-Umphrey, Allison M. Snider, Andrea Bonisoli-Alquati, Jill A. Olin, Philip C. Stouffer, Sabrina S. Taylor, Paola C. López-Duarte, Brian J. Roberts, Linda Hooper-Bui, Michael J. Polito

Faculty Publications

Bioindicator species are commonly used as proxies to help identify the ecological effects of oil spills and other stressors. However, the utility of taxa as bioindicators is dependent on understanding their trophic niche and life history characteristics, as these factors mediate their ecological responses. Seaside sparrows (Ammospiza maritima) and marsh rice rats (Oryzomys palustris) are two ubiquitous terrestrial vertebrates that are thought to be bioindicators of oil spills in saltmarsh ecosystems. To improve the utility of these omnivorous taxa as bioindicators, we used carbon and nitrogen stable isotope analysis to quantify their trophic niches at saltmarshes in coastal Louisiana with …

Go to article

Hydraulic Architecture Explains Species Moisture Dependency But Not Mortality Rates Across A Tropical Rainfall Gradient, Alexandria L. Pivovaroff, Brett T. Wolfe, Nate Mcdowell, Bradley Christoffersen, Stuart Davies, L. Turin Dickman, Charlotte Grossiord, Riley T. Leff, Alistair Rogers, Shawn P. Serbin, S. Joseph Wright, Jin Wu, Chonggang Xu, Jeffrey Q. Chambers Jul 2021

Hydraulic Architecture Explains Species Moisture Dependency But Not Mortality Rates Across A Tropical Rainfall Gradient, Alexandria L. Pivovaroff, Brett T. Wolfe, Nate Mcdowell, Bradley Christoffersen, Stuart Davies, L. Turin Dickman, Charlotte Grossiord, Riley T. Leff, Alistair Rogers, Shawn P. Serbin, S. Joseph Wright, Jin Wu, Chonggang Xu, Jeffrey Q. Chambers

Faculty Publications

Intensified droughts are affecting tropical forests across the globe. However, the underlying mechanisms of tree drought response and mortality are poorly understood. Hydraulic traits and especially hydraulic safety margins (HSMs), that is, the extent to which plants buffer themselves from thresholds of water stress, provide insights into species-specific drought vulnerability. We investigated hydraulic traits during an intense drought triggered by the 2015–2016 El Niño on 27 canopy tree species across three tropical forest sites with differing precipitation. We capitalized on the drought event as a time when plant water status might approach or exceed thresholds of water stress. We investigated …

Go to article

Factors Protecting Against A Decline In Physical Activity During The Covid-19 Pandemic, S. Nicole Fearnbach, Emily W. Flanagan, Christoph Höchsmann, Robbie A. Beyl, Abby D. Altazan, Corby K. Martin, Leanne M. Redman Jul 2021

Factors Protecting Against A Decline In Physical Activity During The Covid-19 Pandemic, S. Nicole Fearnbach, Emily W. Flanagan, Christoph Höchsmann, Robbie A. Beyl, Abby D. Altazan, Corby K. Martin, Leanne M. Redman

Clinical Research Faculty Publications

Purpose The spread of COVID-19 and the associated stay-At-home orders and shutdowns of gyms and fitness centers have drastically influenced health behaviors leading to widespread reductions in physical activity (PA). The recent Call to Action from the American College of Sports Medicine has promoted "innovative strategies to promote PA during the COVID-19 pandemic."We aimed to identify individual-level factors that protected against declines in PA levels amid the COVID-19 restrictions. Methods We used the Pennington Biomedical COVID-19 Health Behaviors Survey for our analyses and used mixed-effect linear and generalized linear models to estimate the effects of individual-level factors on changes in …

Go to article

Food Insecurity And Weight Loss In An Underserved Primary Care Population: A Post Hoc Analysis Of A Cluster Randomized Trial, Candice A. Myers, Corby K. Martin, John W. Apolzan, Connie L. Arnold, Terry C. Davis, William D. Johnson, Peter T. Katzmarzyk Jul 2021

Food Insecurity And Weight Loss In An Underserved Primary Care Population: A Post Hoc Analysis Of A Cluster Randomized Trial, Candice A. Myers, Corby K. Martin, John W. Apolzan, Connie L. Arnold, Terry C. Davis, William D. Johnson, Peter T. Katzmarzyk

Clinical Research Faculty Publications

No abstract provided.

Go to article

Machine Learning Risk Score For Prediction Of Gestational Diabetes In Early Pregnancy In Tianjin, China, Hongwei Liu, Jing Li, Junhong Leng, Hui Wang, Jinnan Liu, Weiqin Li, Hongyan Liu, Shuo Wang, Jun Ma, Juliana C.N. Chan, Zhijie Yu, Gang Hu, Changping Li, Xilin Yang Jul 2021

Machine Learning Risk Score For Prediction Of Gestational Diabetes In Early Pregnancy In Tianjin, China, Hongwei Liu, Jing Li, Junhong Leng, Hui Wang, Jinnan Liu, Weiqin Li, Hongyan Liu, Shuo Wang, Jun Ma, Juliana C.N. Chan, Zhijie Yu, Gang Hu, Changping Li, Xilin Yang

Population and Public Health Science Faculty Publications

Aims: This study aimed to develop a machine learning–based prediction model for gestational diabetes mellitus (GDM) in early pregnancy in Chinese women. Materials and methods: We used an established population-based prospective cohort of 19,331 pregnant women registered as pregnant before the 15th gestational week in Tianjin, China, from October 2010 to August 2012. The dataset was randomly divided into a training set (70%) and a test set (30%). Risk factors collected at registration were examined and used to construct the prediction model in the training dataset. Machine learning, that is, the extreme gradient boosting (XGBoost) method, was employed to develop …

Go to article

Exercise Is Key To Sustaining Metabolic Gains After Bariatric Surgery, Bruno Gualano, John P. Kirwan, Hamilton Roschel Jul 2021

Exercise Is Key To Sustaining Metabolic Gains After Bariatric Surgery, Bruno Gualano, John P. Kirwan, Hamilton Roschel

Division of Basic Science Faculty Publications

The extent to which the benefits of bariatric surgery may be maintained by lifestyle changes after surgery is unclear. Our hypothesis is that exercise may sustain some metabolic benefits and counteract some of the adverse effects of surgery. In this review, we present findings supporting the proposition that exercise is key to improving overall health in patients after bariatric surgery.

Go to article

Microbial Abundance And Enzymatic Activity From Tussock And Shrub Soil In Permafrost Peatland After 6-Year Warming, Yanyu Song, Lei Jiang, Changchun Song, Xianwei Wang, Xiuyan Ma, Hao Zhang, Wenwen Tan, Jinli Gao, Aixin Hou Jul 2021

Microbial Abundance And Enzymatic Activity From Tussock And Shrub Soil In Permafrost Peatland After 6-Year Warming, Yanyu Song, Lei Jiang, Changchun Song, Xianwei Wang, Xiuyan Ma, Hao Zhang, Wenwen Tan, Jinli Gao, Aixin Hou

Faculty Publications

Soil microbes and enzymes in permafrost peatland are sensitive to temperature changes, which might result in more potential loss of carbon and increase in available nitrogen from permafrost peatlands in a warming world. We previously demonstrated that 3-year warming could affect soil microbial abundance and enzymatic activity. However, soil microbial abundance and enzymatic activity in permafrost peatlands under long-term climate warming is not well understood. Therefore, a 6-year field manipulation experiment was used to assess the impact of long-term warming on soil microbial abundance and enzymatic activity in a permafrost peatland in northeastern China. Results showed that 6-year warming increased …

Go to article

Sabre: The Silicon Array For Branching Ratio Experiments, E. C. Good, B. Sudarsan, K. T. Macon, C. M. Deibel, L. T. Baby, J. C. Blackmon, C. Benetti, J. C. Esparza, N. Gerken, K. Hanselman, G. W. Mccann, A. B. Morelock, J. F. Perello, K. H. Pham, E. Rubino, E. Temanson, I. Wiedenhöver Jul 2021

Sabre: The Silicon Array For Branching Ratio Experiments, E. C. Good, B. Sudarsan, K. T. Macon, C. M. Deibel, L. T. Baby, J. C. Blackmon, C. Benetti, J. C. Esparza, N. Gerken, K. Hanselman, G. W. Mccann, A. B. Morelock, J. F. Perello, K. H. Pham, E. Rubino, E. Temanson, I. Wiedenhöver

Faculty Publications

The Silicon Array for Branching Ratio Experiments (SABRE) has been developed for use to study reactions of interest to nuclear structure and astrophysics. The array has been incorporated into the Super Enge Split-Pole Spectrograph (SE-SPS) experimental setup at Florida State University's John D. Fox accelerator laboratory to detect charged-particle decays in coincidence with reaction products detected by the SE-SPS focal plane detector. Its construction and electronics processing are discussed, as well as the commissioning data used to validate its performance.

Go to article

Molecular Evolution Of Ecological Specialisation: Genomic Insights From The Diversification Of Murine Rodents, Emily Roycroft, Anang Achmadi, Colin M. Callahan, Jacob A. Esselstyn, Jeffrey M. Good, Adnan Moussalli, Kevin C. Rowe Jul 2021

Molecular Evolution Of Ecological Specialisation: Genomic Insights From The Diversification Of Murine Rodents, Emily Roycroft, Anang Achmadi, Colin M. Callahan, Jacob A. Esselstyn, Jeffrey M. Good, Adnan Moussalli, Kevin C. Rowe

Faculty Publications

Adaptive radiations are characterized by the diversification and ecological differentiation of species, and replicated cases of this process provide natural experiments for understanding the repeatability and pace ofmolecular evolution.During adaptive radiation, genes related to ecological specialization may be subject to recurrent positive directional selection. However, it is not clear to what extent patterns of lineage-specific ecological specialization (includingphenotypic convergence) are correlatedwithsharedsignatures of molecular evolution. To test this, we sequenced whole exomes from a phylogenetically dispersed sample of 38 murine rodent species, a group characterized bymultiple, nested adaptive radiations comprising extensive ecological and phenotypic diversity.We found that genes associatedwithimmunity, reproduction, diet, …

Go to article

Effects Of Water Stress And Auxin Application On Growth And Yield Of Two Sugarcane Cultivars Under Greenhouse Conditions, Jiraporn Bamrungrai, Brenda Tubana, Vidhaya Tre-Loges, Arunee Promkhambut, Anan Polthanee Jul 2021

Effects Of Water Stress And Auxin Application On Growth And Yield Of Two Sugarcane Cultivars Under Greenhouse Conditions, Jiraporn Bamrungrai, Brenda Tubana, Vidhaya Tre-Loges, Arunee Promkhambut, Anan Polthanee

Faculty Publications

Water stress (drought and flood) is one of the major factors that limits sugarcane growth and yield. The two greenhouse experiments were conducted at Khon Kaen University, Thailand. The first experiment investigated the individual and combined effects of droughts and floods on two sugarcane cultivars. The results showed that photosynthetic potential, based on chlorophyll a fluorescence (PSII) and chlorophyll content, exhibited a response to the water regime treatments. However, stomatal conductance in the K93-219 cultivar was higher than the KK3 cultivar. Similarly, plant height, number of tillers, number of stems, fresh stem weight, and sugar quality were not affected by …

Go to article

Variation In Soil-Test-Based Phosphorus And Potassium Rate Recommendations Across The Southern Usa, Hailin Zhang, Joao Antonangelo, John Grove, Deanna Osmond, Nathan A. Slaton, Shannon Alford, Robert Florence, Gobena Huluka, David Herring Hardy, Jason Lessl, Rory Maguire, Rao Mylavarapu, J. Larry Oldham, Eugenia M. Pena-Yewtukhiw, Tony Provin, Leticia Sonon, David Sotomayor, Jim Wang Jul 2021

Variation In Soil-Test-Based Phosphorus And Potassium Rate Recommendations Across The Southern Usa, Hailin Zhang, Joao Antonangelo, John Grove, Deanna Osmond, Nathan A. Slaton, Shannon Alford, Robert Florence, Gobena Huluka, David Herring Hardy, Jason Lessl, Rory Maguire, Rao Mylavarapu, J. Larry Oldham, Eugenia M. Pena-Yewtukhiw, Tony Provin, Leticia Sonon, David Sotomayor, Jim Wang

Faculty Publications

Thirteen states associated with the Southern Extension and Research Activities Information Exchange Group-6 (SERA-IEG-6) agreed to share their soil test based P and K rate recommendations for nine major crops. The objectives were to compare fertilizer P and K rate recommendations, to look for opportunities to rationalize similar recommendations across state lines, and to examine challenges to the development of a cooperative regional approach to P and K recommendations. Mehlich-3 (eight states), Mehlich-1 (five states), or Lancaster (one state) extractions were the basis of plant available soil P (STP) and K (STK) assessment. Fertilizer recommendation philosophies (sufficiency, build and maintain, …

Go to article

Optimizing Genomic-Enabled Prediction In Small-Scale Maize Hybrid Breeding Programs: A Roadmap Review, Roberto Fritsche-Neto, Giovanni Galli, Karina Lima Reis Borges, Germano Costa-Neto, Filipe Couto Alves, Felipe Sabadin, Danilo Hottis Lyra, Pedro Patric Pinho Morais, Luciano Rogério Braatz De Andrade, Italo Granato, Jose Crossa Jul 2021

Optimizing Genomic-Enabled Prediction In Small-Scale Maize Hybrid Breeding Programs: A Roadmap Review, Roberto Fritsche-Neto, Giovanni Galli, Karina Lima Reis Borges, Germano Costa-Neto, Filipe Couto Alves, Felipe Sabadin, Danilo Hottis Lyra, Pedro Patric Pinho Morais, Luciano Rogério Braatz De Andrade, Italo Granato, Jose Crossa

Faculty Publications

The usefulness of genomic prediction (GP) for many animal and plant breeding programs has been highlighted for many studies in the last 20 years. In maize breeding programs, mostly dedicated to delivering more highly adapted and productive hybrids, this approach has been proved successful for both large- and small-scale breeding programs worldwide. Here, we present some of the strategies developed to improve the accuracy of GP in tropical maize, focusing on its use under low budget and small-scale conditions achieved for most of the hybrid breeding programs in developing countries. We highlight the most important outcomes obtained by the University …

Go to article

Seymour's Second-Neighborhood Conjecture From A Different Perspective, Farid Bouya, Bogdan Oporowski Jul 2021

Seymour's Second-Neighborhood Conjecture From A Different Perspective, Farid Bouya, Bogdan Oporowski

Faculty Publications

Seymour's Second-Neighborhood Conjecture states that every directed graph whose underlying graph is simple has at least one vertex (Formula presented.) such that the number of vertices of out-distance two from (Formula presented.) is at least as large as the number of vertices of out-distance one from it. We present alternative statements of the conjecture in the language of linear algebra.

Go to article

Revenue From Matching Platforms, Philip Marx, James Schummer Jul 2021

Revenue From Matching Platforms, Philip Marx, James Schummer

Faculty Publications

We consider the pricing problem of a platform that matches heterogeneous agents using match-contingent fees. Absent prices, agents on the short side of such markets capture relatively greater surplus than those on the long side (Ashlagi et al. 2017). Nevertheless we show that the platform need not bias its price allocation toward either side. With independently drawn preferences, optimal price allocation decisions are independent of market size or imbalance; furthermore, changes in the optimal price level move both sides' prices in the same direction. In contrast, preference homogeneity biases price allocation in a direction that depends on the form of …

Go to article

Blockumulus: A Scalable Framework For Smart Contracts On The Cloud, Nikolay Ivanov, Qiben Yan, Qingyang Wang Jul 2021

Blockumulus: A Scalable Framework For Smart Contracts On The Cloud, Nikolay Ivanov, Qiben Yan, Qingyang Wang

Faculty Publications

Public blockchains have spurred the growing popularity of decentralized transactions and smart contracts, especially on the financial market. However, public blockchains exhibit their limitations on the transaction throughput, storage availability, and compute capacity. To avoid transaction gridlock, public blockchains impose large fees and per-block resource limits, making it difficult to accommodate the ever-growing high transaction demand. Previous research endeavors to improve the scalability and performance of blockchain through various technologies, such as side-chaining, sharding, secured off-chain computation, communication network optimizations, and efficient consensus protocols. However, these approaches have not attained a widespread adoption due to their inability in delivering a …

Go to article

Functional And Phenotypic Evaluation Of Murine Cytomegalovirus Infection Of The Heart, Cassandra Marie Bonavita Jul 2021

Functional And Phenotypic Evaluation Of Murine Cytomegalovirus Infection Of The Heart, Cassandra Marie Bonavita

LSU Doctoral Dissertations

Human Cytomegalovirus (HCMV) is a ubiquitous pathogen which infects 50-90% of the world population and results in lifelong latent infection with periodic transient reactivations. In immunocompetent populations acute infection is generally asymptomatic but seropositivity is associated with many chronic diseases, including cardiovascular disease. Despite 139 years of research into HCMV pathogenesis there is still no licensed vaccine and many gaps in the general knowledge of the virus. This includes the role of long term infection as it pertains to chronic diseases. In these studies, murine cytomegalovirus (MCMV) was used as a model of HCMV pathogenesis in the heart. MCMV shares …

Go to article

Policing Understood As A Racial Project: An Exploration Of The Role Law Enforcement Has Played In The Shaping Of Race Relations In The United States, Jahaan Chandler Jul 2021

Policing Understood As A Racial Project: An Exploration Of The Role Law Enforcement Has Played In The Shaping Of Race Relations In The United States, Jahaan Chandler

LSU Doctoral Dissertations

Law enforcement and minority communities have had a complicated history in the United States to say the least. The theoretical propositions used to explain the myriad of interlocking relationships between race, criminal activity, neighborhood disorder, public perceptions of crime, and law enforcement itself, have provided us with nuggets of insight that have all contributed to enhancing our understanding of crime and policing in the U.S., but none have provided an overall interpretation of this complex and often convoluted relationship. This dissertation seeks to rectify this issue by not only examining the history of law enforcement and its relation to minority …

Go to article

Barbadin Potentiates Long-Term Effects Of Lorcaserin On Pomc Neurons And Weight Loss, Yang He, Hailan Liu, Na Yin, Yongjie Yang, Chunmei Wang, Meng Yu, Hesong Liu, Chen Liang, Julia Wang, Longlong Tu, Nan Zhang, Lina Wang, Yanlin He, Makoto Fukuda, Qi Wu, Zheng Sun, Qingchun Tong, Yong Xu Jun 2021

Barbadin Potentiates Long-Term Effects Of Lorcaserin On Pomc Neurons And Weight Loss, Yang He, Hailan Liu, Na Yin, Yongjie Yang, Chunmei Wang, Meng Yu, Hesong Liu, Chen Liang, Julia Wang, Longlong Tu, Nan Zhang, Lina Wang, Yanlin He, Makoto Fukuda, Qi Wu, Zheng Sun, Qingchun Tong, Yong Xu

Division of Basic Science Faculty Publications

Obesity is a serious global health problem because of its increasing prevalence and comorbidities, but its treatments are limited. The serotonin 2C receptor (5-HT2CR), a G-protein-coupled receptor, activates proopiomelanocortin (POMC) neurons in the arcuate nucleus of hypothalamus (ARH) to reduce appetite and weight gain. However, several 5-HT analogs targeting this receptor, e.g., lorcaserin (Lor), suffer from diminished efficacy to reduce weight after prolonged administration. Here, we show that barbadin (Bar), a novel b-arrestin/b2-adaptin inhibitor, can prevent 5-HT2CR internalization in cells and potentiate long-term effects of Lor to reduce appetite and body weight in male mice. Mechanistically, we demonstrate that Bar …

Go to article

Simulation Of Compound Flood Events In Low-Gradient Coastal Watershed, Felix Luis Santiago-Collazo Jun 2021

Simulation Of Compound Flood Events In Low-Gradient Coastal Watershed, Felix Luis Santiago-Collazo

LSU Doctoral Dissertations

Low-gradient coastal watersheds are susceptible to flooding caused by various flows such as rainfall, tides, and storm surge. Compound flooding occurs when at least two of these mechanisms happen simultaneously or in close succession. Different inundation models, observed data, and/or a combination of these are coupled through varying techniques involving one-way, loosely, tightly, or fully coupled approaches to assess compound flooding. This study presents a one-dimensional (1-D), fully coupled compound inundation model based on the Shallow Water equations. This model approach simultaneously simulates the free water surface variations in the ocean domain (i.e., tide and storm surge modeling), rainfall-runoff in …

Go to article

An Introduction To Jazz Performance Skills And Techniques For Trombone: The Bordogni Jazz Project, William Ford Jun 2021

An Introduction To Jazz Performance Skills And Techniques For Trombone: The Bordogni Jazz Project, William Ford

LSU Doctoral Dissertations

The Bordogni Jazz Project are arrangements of eight Bordogni Vocalises using harmonic and rhythmic elements from the jazz style, and new, original etudes that were composed based on the reharmonizations of the original Bordogni etude melodies. The material is intended to provide a comprehensive, but attainable resource for trombonists and educators which is inclusive of the stylistic nuances, performance practices, and cultural backgrounds associated with the jazz idiom. These are to be used as a resource to introduce classically trained trombonists to jazz playing and performance practices. Through study of this material, trombonists will ultimately be able to take advantage …

Go to article

General Versus Person-Specific Models Of Psychotic-Like Symptoms, Thanh Phuoc Le Jun 2021

General Versus Person-Specific Models Of Psychotic-Like Symptoms, Thanh Phuoc Le

LSU Doctoral Dissertations

Schizophrenia is a chronic brain disease and carries a profound burden of illness and disability. Schizotypy, reflecting personality traits associated with a vulnerability for schizophrenia-spectrum pathology, is characterized, in part, by a tendency to experience psychotic-like symptoms (PLS). Perceived social support, or lack thereof, plays a role in the intensity of PLS. Etiological mechanisms underlying PLS, such as monolithic social support, are putatively expected to be common across individuals sharing elevated schizotypal traits. This “nomothetic” model fails to appreciate that social support is multidimensional and likely idiographic in its effects on PLS. Another salient issue that arises when attempting to …

Go to article

First Prev Next Last