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Louisiana State University

2014

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Metastable Behavior For Conservative Dynamics On A Finite Box With Open Boundary, Taizo Chiyonobu, Yusuke Takagi Dec 2014

Metastable Behavior For Conservative Dynamics On A Finite Box With Open Boundary, Taizo Chiyonobu, Yusuke Takagi

Communications on Stochastic Analysis

No abstract provided.


Absence Of Energy Level Crossing For The Ground State Energy Of The Rabi Model, Masao Hirokawa, Fumio Hiroshima Dec 2014

Absence Of Energy Level Crossing For The Ground State Energy Of The Rabi Model, Masao Hirokawa, Fumio Hiroshima

Communications on Stochastic Analysis

No abstract provided.


An Entropy Approach To Bose-Einstein Condensation, Francesco De Vecchi, Stefania Ugolini Dec 2014

An Entropy Approach To Bose-Einstein Condensation, Francesco De Vecchi, Stefania Ugolini

Communications on Stochastic Analysis

No abstract provided.


Higher Powers Of Quantum White Noise Derivatives, Aymen Ettaieb, Habib Ouerdiane, Hafedh Rguigui Dec 2014

Higher Powers Of Quantum White Noise Derivatives, Aymen Ettaieb, Habib Ouerdiane, Hafedh Rguigui

Communications on Stochastic Analysis

No abstract provided.


Carbonate Orientational Order And Superlattice Structure In Vaterite, Jianwei Wang, Fuxiang Zhang, Jiaming Zhang, Rodney C. Ewing, Udo Becker, Zhonghou Cai Dec 2014

Carbonate Orientational Order And Superlattice Structure In Vaterite, Jianwei Wang, Fuxiang Zhang, Jiaming Zhang, Rodney C. Ewing, Udo Becker, Zhonghou Cai

Faculty Publications

© 2014 Elsevier B.V. All rights reserved. Vaterite is considered to play an important role as a precursor phase in the formation of calcium carbonate phases, including those related to biomineralization. An accurate description of vaterite's structure associated with the order of carbonate groups is essential to understanding the formation, stabilization, and functionality of vaterite in organisms. Molecular dynamics simulations, synchrotron X-ray diffraction, and transmission electron microscopy have been combined in order to investigate the structure of vaterite. The electrostatic interactions between Ca and neighboring CO3 groups promote local and long-range ordering of CO3 groups, which may result in a …


Ages And Magnetic Structures Of The South China Sea Constrained By Deep Tow Magnetic Surveys And Iodp Expedition 349, Chun Feng Li, Xing Xu, Jian Lin, Zhen Sun, Jian Zhu, Yongjian Yao, Xixi Zhao, Qingsong Liu, Denise K. Kulhanek, Jian Wang, Taoran Song, Junfeng Zhao, Ning Qiu, Yongxian Guan, Zhiyuan Zhou, Trevor Williams, Rui Bao, Anne Briais, Elizabeth A. Brown, Yifeng Chen, Peter D. Clift, Frederick S. Colwell, Kelsie A. Dadd, Weiwei Ding, Iván Hernández Almeida, Xiao Long Huang, Sangmin Hyun, Tao Jiang, Anthony A.P. Koppers, Qianyu Li, Chuanlian Liu, Zhifei Liu, Renata H. Nagai Dec 2014

Ages And Magnetic Structures Of The South China Sea Constrained By Deep Tow Magnetic Surveys And Iodp Expedition 349, Chun Feng Li, Xing Xu, Jian Lin, Zhen Sun, Jian Zhu, Yongjian Yao, Xixi Zhao, Qingsong Liu, Denise K. Kulhanek, Jian Wang, Taoran Song, Junfeng Zhao, Ning Qiu, Yongxian Guan, Zhiyuan Zhou, Trevor Williams, Rui Bao, Anne Briais, Elizabeth A. Brown, Yifeng Chen, Peter D. Clift, Frederick S. Colwell, Kelsie A. Dadd, Weiwei Ding, Iván Hernández Almeida, Xiao Long Huang, Sangmin Hyun, Tao Jiang, Anthony A.P. Koppers, Qianyu Li, Chuanlian Liu, Zhifei Liu, Renata H. Nagai

Faculty Publications

© 2014. American Geophysical Union. All Rights Reserved. Combined analyses of deep tow magnetic anomalies and International Ocean Discovery Program Expedition 349 cores show that initial seafloor spreading started around 33 Ma in the northeastern South China Sea (SCS), but varied slightly by 1-2 Myr along the northern continent-ocean boundary (COB). A southward ridge jump of ∼20 km occurred around 23.6 Ma in the East Subbasin; this timing also slightly varied along the ridge and was coeval to the onset of seafloor spreading in the Southwest Subbasin, which propagated for about 400 km southwestward from ∼23.6 to ∼21.5 Ma. The …


Review Of Methods To Assign The Nuclear Magnetic Resonance Peaks Of Reductively Methylated Proteins, Kevin J. Roberson, Megan A. Macnaughtan Dec 2014

Review Of Methods To Assign The Nuclear Magnetic Resonance Peaks Of Reductively Methylated Proteins, Kevin J. Roberson, Megan A. Macnaughtan

Faculty Publications

© 2014 Elsevier Inc. Reductive methylation of lysyl side-chain amines has been a successful tool in the advancement of high-resolution structural biology. The utility of this method has continuously gained ground as a protein chemical modification, first as a tool to aid protein crystallization and later as a probe in protein nuclear magnetic resonance (NMR) spectroscopy. As an isotope-labeling strategy for NMR studies, reductive methylation has contributed to the study of protein-protein interactions and global conformational changes. Although more detailed structural studies using this labeling strategy are possible, the hurdle of assigning the NMR peaks to the corresponding reductively methylated …


Conservation And Ecological Implications Of The Introgression Between Black Bass Subspecies, Rachel Tessier Dec 2014

Conservation And Ecological Implications Of The Introgression Between Black Bass Subspecies, Rachel Tessier

Honors Theses

No abstract provided.


An Exploration Of Cell Cycle Regulation In Arabidopsis Thaliana Trichomes, Ashley Willis Dec 2014

An Exploration Of Cell Cycle Regulation In Arabidopsis Thaliana Trichomes, Ashley Willis

Honors Theses

No abstract provided.


Faculty Senate Newsletter, Holiday 2014, Louisiana State University And Agricultural & Mechanical College Dec 2014

Faculty Senate Newsletter, Holiday 2014, Louisiana State University And Agricultural & Mechanical College

LSU Faculty Senate Publications

Message from President: Christmas, as it was called before it became a generic all-purpose “holiday,” is, at least in the propaganda of western cultures, all about universality: about the day when, so it seemed, the whole world lay at rest, when benefactions went out, if not to all mankind, at least to those on Santa’s good-person list. Christmas, indeed most any winter holiday, depends on the mass distribution of information: on everyone learning (a) that this is the day to keep calm and (b) what it is—what is the cultural and philosophical context—for at least a temporary peace. Everybody’s favorite …


The Economics Of Mitigation Of Water Pollution Externalities From Biomass Production For Energy, Naveen Adusumilli, Taesoo Lee, M. Edward Rister, Ronald D. Lacewell Dec 2014

The Economics Of Mitigation Of Water Pollution Externalities From Biomass Production For Energy, Naveen Adusumilli, Taesoo Lee, M. Edward Rister, Ronald D. Lacewell

Faculty Publications

© 2014 by the authors; licensee MDPI, Basel, Switzerland. To fulfill the national bioenergy goals of the United States, conversion of marginal lands to intensive biomass crop production and/or application of greater amounts of nutrients to existing cropland could be expected. Such change in agricultural practices could produce unintended environmental consequences such as water quality degradation. Select Best Management Practices (BMPs) are evaluated for water quality mitigation effectiveness as well as for their relative cost-effectiveness, issues that are often ignored in evaluation of biofuels as a sustainable solution for energy demand. The water quality impacts of converting pastureland to intensive …


Assessing The Use Ofdynamic Video Profilingscientists In Conveying Astrobiology Concepts, Michelle St. Romain Dec 2014

Assessing The Use Ofdynamic Video Profilingscientists In Conveying Astrobiology Concepts, Michelle St. Romain

Honors Theses

No abstract provided.


Functional Morphology Of The Connective Tissue Of The Clavicular System Of The Domestic Cat, Felis Catus, Amanda N. Cooper Dec 2014

Functional Morphology Of The Connective Tissue Of The Clavicular System Of The Domestic Cat, Felis Catus, Amanda N. Cooper

Honors Theses

No abstract provided.


Functional Morphology Of The Connective Tissue Of The Clavicular System Of The Domestic Cat, Felis Catus, Amanda N. Cooper Dec 2014

Functional Morphology Of The Connective Tissue Of The Clavicular System Of The Domestic Cat, Felis Catus, Amanda N. Cooper

Honors Theses

No abstract provided.


Sulfates Hydrating Bulk Soil In The Martian Low And Middle Latitudes, S. Karunatillake, J. J. Wray, O. Gasnault, S. M. Mclennan, A. D. Rogers, S. W. Squyres, W. V. Boynton, J. R. Skok, L. Ojha, N. Olsen Nov 2014

Sulfates Hydrating Bulk Soil In The Martian Low And Middle Latitudes, S. Karunatillake, J. J. Wray, O. Gasnault, S. M. Mclennan, A. D. Rogers, S. W. Squyres, W. V. Boynton, J. R. Skok, L. Ojha, N. Olsen

Faculty Publications

© 2014. American Geophysical Union. All Rights Reserved. The evidence for sulfate-bearing strata, across Late-Noachian to Amazonian eons, suggests a central role for sulfates in acidity and salinity of Martian paleofluids and the planet's habitability. However, details remain unclear owing to shallow sampling and the limited ability of visible/near-infrared spectroscopy to distinguish among some sulfates. Using chemical data from the Mars Odyssey gamma ray spectrometer, including the sulfur map of Mars, we confirm the possibility of hydrous sulfates acting as key hydrates throughout the southern midlatitudinal soil at decimeter depths. An H2O:S molar ratio between 2.4 and 4.0 for 80% …


Photoheterotrophic Growth Of Physcomitrella Patens, Terry M. Bricker, Adam J. Bell, Lan Tran, Laurie K. Frankel, Steven M. Theg Nov 2014

Photoheterotrophic Growth Of Physcomitrella Patens, Terry M. Bricker, Adam J. Bell, Lan Tran, Laurie K. Frankel, Steven M. Theg

Faculty Publications

© Springer-Verlag Berlin Heidelberg 2013. Physcomitrella patens is a model bryophyte representing an early land plant in the green plant lineage. This organism possesses many advantages as a model organism. Its genome has been sequenced, its predominant life cycle stage is the haploid gametophyte, it is readily transformable and it can integrate transformed DNA into its genome by homologous recombination. One limitation for the use of P. patens in photosynthesis research is its reported inability to grow photoheterotrophically, in the presence of sucrose and the Photosystem II inhibitor 3-(3,4-dichlorophenyl)-1,1-dimethylurea, which prevents linear photosynthetic electron transport. In this communication we describe …


Asymmetric Avalanches In The Condensate Of A Zeeman-Limited Superconductor, J. C. Prestigiacomo, T. J. Liu, P. W. Adams Nov 2014

Asymmetric Avalanches In The Condensate Of A Zeeman-Limited Superconductor, J. C. Prestigiacomo, T. J. Liu, P. W. Adams

Faculty Publications

We report the nonequilibrium behavior of disordered superconducting Al films in high Zeeman fields. We have measured the tunneling density of states of the films through the first-order Zeeman critical field transition. We find that films with sheet resistances of a few hundred ohms exhibit large avalanchelike collapses of the condensate on the superheating branch of the critical field hysteresis loop. In contrast, the transition back into the superconducting phase (i.e., along the supercooling branch) is always continuous. The fact that the condensate follows an unstable trajectory to the normal state suggests that the order parameter in the hysteretic regime …


Resonant Faraday And Kerr Effects Due To In-Gap States On The Surface Of A Topological Insulator, Justin H. Wilson, Dmitry K. Efimkin, Victor M. Galitski Nov 2014

Resonant Faraday And Kerr Effects Due To In-Gap States On The Surface Of A Topological Insulator, Justin H. Wilson, Dmitry K. Efimkin, Victor M. Galitski

Faculty Publications

When Dirac electrons on the surface of a topological insulator are gapped, the resulting quantum anomalous Hall effect leads to universal magneto-optical Faraday and Kerr effects in the low-frequency limit. However, at higher frequencies different excitations can leave their own fingerprints on the magneto-optics and can therefore be probed. In particular, we investigate the role of localized in-gap states - which inevitably appear in the presence of charged impurities - on these higher-frequency magneto-optical effects. We have shown that these states resonantly contribute to the Hall conductivity and are magneto-optically active. These in-gap states lead to peculiar resonant signatures in …


The Drivers Of Tropical Speciation, Brian Tilston Smith, John E. Mccormack, Andrés M. Cuervo, Michael J. Hickerson, Alexandre Aleixo, Carlos Daniel Cadena, Jorge Pérez-Emán, Curtis W. Burney, Xiaoou Xie, Michael G. Harvey, Brant C. Faircloth, Travis C. Glenn, Elizabeth P. Derryberry, Jesse Prejean, Samantha Fields, Robb T. Brumfield Nov 2014

The Drivers Of Tropical Speciation, Brian Tilston Smith, John E. Mccormack, Andrés M. Cuervo, Michael J. Hickerson, Alexandre Aleixo, Carlos Daniel Cadena, Jorge Pérez-Emán, Curtis W. Burney, Xiaoou Xie, Michael G. Harvey, Brant C. Faircloth, Travis C. Glenn, Elizabeth P. Derryberry, Jesse Prejean, Samantha Fields, Robb T. Brumfield

Faculty Publications

© 2014 Macmillan Publishers Limited. All rights reserved. Since the recognition that allopatric speciation can be induced by large-scale reconfigurations of the landscape that isolate formerly continuous populations, such as the separation of continents by plate tectonics, the uplift of mountains or the formation of large rivers, landscape change has been viewed as a primary driver of biological diversification. This process is referred to in biogeography as vicariance. In the most species-rich region of the world, the Neotropics, the sundering of populations associated with the Andean uplift is ascribed this principal role in speciation. An alternative model posits that rather …


Mechanical Expansion Of Steel Tubing As A Solution To Leaky Wellbores, Mileva Radonjic, Darko Kupresan Nov 2014

Mechanical Expansion Of Steel Tubing As A Solution To Leaky Wellbores, Mileva Radonjic, Darko Kupresan

Faculty Publications

Wellbore cement, a procedural component of wellbore completion operations, primarily provides zonal isolation and mechanical support of the metal pipe (casing), and protects metal components from corrosive fluids. These are essential for uncompromised wellbore integrity. Cements can undergo multiple forms of failure, such as debonding at the cement/rock and cement/metal interfaces, fracturing, and defects within the cement matrix. Failures and defects within the cement will ultimately lead to fluid migration, resulting in inter-zonal fluid migration and premature well abandonment. Currently, there are over 1.8 million operating wells worldwide and over one third of these wells have leak related problems defined …


A Raman Microspectroscopy Study Of Water And Trehalose In Spin-Dried Cells, Alireza Abazari, Nilay Chakraborty, Steven Hand, Alptekin Aksan, Mehmet Toner Nov 2014

A Raman Microspectroscopy Study Of Water And Trehalose In Spin-Dried Cells, Alireza Abazari, Nilay Chakraborty, Steven Hand, Alptekin Aksan, Mehmet Toner

Faculty Publications

© 2014 Biophysical Society. Long-term storage of desiccated nucleated mammalian cells at ambient temperature may be accomplished in a stable glassy state, which can be achieved by removal of water from the biological sample in the presence of glass-forming agents including trehalose. The stability of the glass may be compromised due to a nonuniform distribution of residual water and trehalose within and around the desiccated cells. Thus, quantification of water and trehalose contents at the single-cell level is critical for predicting the glass formation and stability for dry storage. Using Raman microspectroscopy, we estimated the trehalose and residual water contents …


Multimessenger Search For Sources Of Gravitational Waves And High-Energy Neutrinos: Initial Results For Ligo-Virgo And Icecube, M. G. Aartsen, M. Ackermann, J. Adams, J. A. Aguilar, M. Ahlers, M. Ahrens, D. Altmann, T. Anderson, C. Arguelles, T. C. Arlen, J. Auffenberg, X. Bai, S. W. Barwick, V. Baum, J. J. Beatty, J. Becker Tjus, K. H. Becker, S. Benzvi, P. Berghaus, D. Berley, E. Bernardini, A. Bernhard, D. Z. Besson, G. Binder, D. Bindig, M. Bissok, E. Blaufuss, J. Blumenthal, D. J. Boersma, C. Bohm, F. Bos, D. Bose, S. Böser Nov 2014

Multimessenger Search For Sources Of Gravitational Waves And High-Energy Neutrinos: Initial Results For Ligo-Virgo And Icecube, M. G. Aartsen, M. Ackermann, J. Adams, J. A. Aguilar, M. Ahlers, M. Ahrens, D. Altmann, T. Anderson, C. Arguelles, T. C. Arlen, J. Auffenberg, X. Bai, S. W. Barwick, V. Baum, J. J. Beatty, J. Becker Tjus, K. H. Becker, S. Benzvi, P. Berghaus, D. Berley, E. Bernardini, A. Bernhard, D. Z. Besson, G. Binder, D. Bindig, M. Bissok, E. Blaufuss, J. Blumenthal, D. J. Boersma, C. Bohm, F. Bos, D. Bose, S. Böser

Faculty Publications

We report the results of a multimessenger search for coincident signals from the LIGO and Virgo gravitational-wave observatories and the partially completed IceCube high-energy neutrino detector, including periods of joint operation between 2007-2010. These include parts of the 2005-2007 run and the 2009-2010 run for LIGO-Virgo, and IceCube's observation periods with 22, 59 and 79 strings. We find no significant coincident events, and use the search results to derive upper limits on the rate of joint sources for a range of source emission parameters. For the optimistic assumption of gravitational-wave emission energy of 10-2M c2 at ∼150Hz with ∼60ms duration, …


Crystal Structure Of A Lipoxygenase In Complex With Substrate: The Arachidonic Acid-Binding Site Of 8r-Lipoxygenase, David B. Neau, Gunes Bender, William E. Boeglin, Sue G. Bartlett, Alan R. Brash, Marcia E. Newcomer Nov 2014

Crystal Structure Of A Lipoxygenase In Complex With Substrate: The Arachidonic Acid-Binding Site Of 8r-Lipoxygenase, David B. Neau, Gunes Bender, William E. Boeglin, Sue G. Bartlett, Alan R. Brash, Marcia E. Newcomer

Faculty Publications

Lipoxygenases (LOX) play critical roles in mammalian biology in the generation of potent lipid mediators of the inflammatory response; consequently, they are targets for the development of isoform-specific inhibitors. The regio- and stereo-specificity of the oxygenation of polyunsaturated fatty acids by the enzymes is understood in terms of the chemistry, but structural observation of the enzyme-substrate interactions is lacking. Although several LOX crystal structures are available, heretofore the rapid oxygenation of bound substrate has precluded capture of the enzyme-substrate complex, leaving a gap between chemical and structural insights. In this report, we describe the 2.0 Å resolution structure of 8R-LOX …


The Expanding Fireball Of Nova Delphini 2013, G. H. Schaefer, T. Ten Brummelaar, D. R. Gies, C. D. Farrington, B. Kloppenborg, O. Chesneau, J. D. Monnier, S. T. Ridgway, N. Scott, I. Tallon-Bosc, H. A. Mcalister, T. Boyajian, V. Maestro, D. Mourard, A. Meilland, N. Nardetto, P. Stee, J. Sturmann, N. Vargas, F. Baron, M. Ireland, E. K. Baines, X. Che, J. Jones, N. D. Richardson, R. M. Roettenbacher, L. Sturmann, N. H. Turner, P. Tuthill, G. Van Belle, K. Von Braun, R. T. Zavala, D. P.K. Banerjee Nov 2014

The Expanding Fireball Of Nova Delphini 2013, G. H. Schaefer, T. Ten Brummelaar, D. R. Gies, C. D. Farrington, B. Kloppenborg, O. Chesneau, J. D. Monnier, S. T. Ridgway, N. Scott, I. Tallon-Bosc, H. A. Mcalister, T. Boyajian, V. Maestro, D. Mourard, A. Meilland, N. Nardetto, P. Stee, J. Sturmann, N. Vargas, F. Baron, M. Ireland, E. K. Baines, X. Che, J. Jones, N. D. Richardson, R. M. Roettenbacher, L. Sturmann, N. H. Turner, P. Tuthill, G. Van Belle, K. Von Braun, R. T. Zavala, D. P.K. Banerjee

Faculty Publications

A classical nova occurs when material accreting onto the surface of a white dwarf in a close binary system ignites in a thermonuclear runaway. Complex structures observed in the ejecta at late stages could result from interactions with the companion during the common-envelope phase. Alternatively, the explosion could be intrinsically bipolar, resulting from a localized ignition on the surface of the white dwarf or as a consequence of rotational distortion. Studying the structure of novae during the earliest phases is challenging because of the high spatial resolution needed to measure their small sizes. Here we report near-infrared interferometric measurements of …


The City’S Unnoticed Limits: Considerations About The Boundaries In Caracas, Fabio Capra-Ribeiro Nov 2014

The City’S Unnoticed Limits: Considerations About The Boundaries In Caracas, Fabio Capra-Ribeiro

Faculty Publications

In Caracas, insecurity has prompted an individual but generalized quest for isolation that is translated into an accelerated growth of boundaries as walls and fences. This situation has led to a significant deterioration of the spaces around them, setback space on one side and the street on the other, confined and divided, urban fabric if getting fragmented. The research wants then to illustrate this complex problem from a qualitative methodology and the hermeneutic circle, from which dialogical relationships are established between the elements analyzed. The main contributions of the research highlights the explanation of a reality that is happening nowadays …


Use Of Protein Cross-Linking And Radiolytic Footprinting To Elucidate Psbp And Psbq Interactions Within Higher Plant Photosystem Ii, Manjula P. Mummadisetti, Laurie K. Frankel, Henry D. Bellamy, Larry Sallans, Jost S. Goettert, Michal Brylinski, Patrick A. Limbach, Terry M. Bricker Nov 2014

Use Of Protein Cross-Linking And Radiolytic Footprinting To Elucidate Psbp And Psbq Interactions Within Higher Plant Photosystem Ii, Manjula P. Mummadisetti, Laurie K. Frankel, Henry D. Bellamy, Larry Sallans, Jost S. Goettert, Michal Brylinski, Patrick A. Limbach, Terry M. Bricker

Faculty Publications

Protein cross-linking and radiolytic footprinting coupled with highresolution mass spectrometry were used to examine the structure of PsbP and PsbQ when they are bound to Photosystem II. In its bound state, the N-terminal 15-amino-acid residue domain of PsbP, which is unresolved in current crystal structures, interacts with domains in the C terminus of the protein. These interactions may serve to stabilize the structure of the N terminus and may facilitate PsbP binding and function. These interactions place strong structural constraints on the organization of PsbP when associated with the Photosystem II complex. Additionally, amino acid residues in the structurally unresolved …


Use Of Protein Cross-Linking And Radiolytic Footprinting To Elucidate Psbp And Psbq Interactions Within Higher Plant Photosystem Ii, Manjula P. Mummadisetti, Laurie K. Frankel, Henry D. Bellamy, Larry Sallans, Jost S. Goettert, Michal Brylinski, Patrick A. Limbach, Terry M. Bricker Nov 2014

Use Of Protein Cross-Linking And Radiolytic Footprinting To Elucidate Psbp And Psbq Interactions Within Higher Plant Photosystem Ii, Manjula P. Mummadisetti, Laurie K. Frankel, Henry D. Bellamy, Larry Sallans, Jost S. Goettert, Michal Brylinski, Patrick A. Limbach, Terry M. Bricker

Faculty Publications

Protein cross-linking and radiolytic footprinting coupled with highresolution mass spectrometry were used to examine the structure of PsbP and PsbQ when they are bound to Photosystem II. In its bound state, the N-terminal 15-amino-acid residue domain of PsbP, which is unresolved in current crystal structures, interacts with domains in the C terminus of the protein. These interactions may serve to stabilize the structure of the N terminus and may facilitate PsbP binding and function. These interactions place strong structural constraints on the organization of PsbP when associated with the Photosystem II complex. Additionally, amino acid residues in the structurally unresolved …


Phylotranscriptomic Analysis Of The Origin And Early Diversification Of Land Plants, Norman J. Wickett, Siavash Mirarab, Nam Nguyen, Tandy Warnow, Eric Carpenter, Naim Matasci, Saravanaraj Ayyampalayam, Michael S. Barker, J. Gordon Burleigh, Matthew A. Gitzendanner, Brad R. Ruhfel, Eric Wafula, Joshua P. Der, Sean W. Graham, Sarah Mathews, Michael Melkonian, Douglas E. Soltis, Pamela S. Soltis, Nicholas W. Miles, Carl J. Rothfels, Lisa Pokorny, A. Jonathan Shaw, Lisa De Gironimo, Dennis W. Stevenson, Barbara Surek, Juan Carlos Villarreal, Béatrice Roure, Hervé Philippe, Claude W. De Pamphilis, Tao Chen, Michael K. Deyholos, Regina S. Baucom, Toni M. Kutchan Nov 2014

Phylotranscriptomic Analysis Of The Origin And Early Diversification Of Land Plants, Norman J. Wickett, Siavash Mirarab, Nam Nguyen, Tandy Warnow, Eric Carpenter, Naim Matasci, Saravanaraj Ayyampalayam, Michael S. Barker, J. Gordon Burleigh, Matthew A. Gitzendanner, Brad R. Ruhfel, Eric Wafula, Joshua P. Der, Sean W. Graham, Sarah Mathews, Michael Melkonian, Douglas E. Soltis, Pamela S. Soltis, Nicholas W. Miles, Carl J. Rothfels, Lisa Pokorny, A. Jonathan Shaw, Lisa De Gironimo, Dennis W. Stevenson, Barbara Surek, Juan Carlos Villarreal, Béatrice Roure, Hervé Philippe, Claude W. De Pamphilis, Tao Chen, Michael K. Deyholos, Regina S. Baucom, Toni M. Kutchan

Faculty Publications

Reconstructing the origin and evolution of land plants and their algal relatives is a fundamental problem in plant phylogenetics, and is essential for understanding how critical adaptations arose, including the embryo, vascular tissue, seeds, and flowers. Despite advances inmolecular systematics, some hypotheses of relationships remain weakly resolved. Inferring deep phylogenies with bouts of rapid diversification can be problematic; however, genome-scale data should significantly increase the number of informative characters for analyses. Recent phylogenomic reconstructions focused on the major divergences of plants have resulted in promising but inconsistent results. One limitation is sparse taxon sampling, likely resulting from the difficulty and …


The Optical Luminosity Function Of Gamma-Ray Bursts Deduced From Rotse-Iii Observations, X. H. Cui, X. F. Wu, J. J. Wei, F. Yuan, W. K. Zheng, E. W. Liang, C. W. Akerlof, M. C.B. Ashley, H. A. Flewelling, E. Göüş, T. Güver, Kizilolu, T. A. Mckay, S. B. Pandey, E. S. Rykoff, W. Rujopakarn, B. E. Schaefer, J. C. Wheeler, S. A. Yost Nov 2014

The Optical Luminosity Function Of Gamma-Ray Bursts Deduced From Rotse-Iii Observations, X. H. Cui, X. F. Wu, J. J. Wei, F. Yuan, W. K. Zheng, E. W. Liang, C. W. Akerlof, M. C.B. Ashley, H. A. Flewelling, E. Göüş, T. Güver, Kizilolu, T. A. Mckay, S. B. Pandey, E. S. Rykoff, W. Rujopakarn, B. E. Schaefer, J. C. Wheeler, S. A. Yost

Faculty Publications

We present the optical luminosity function (LF) of gamma-ray bursts (GRBs) estimated from a uniform sample of 58 GRBs from observations with the Robotic Optical Transient Search Experiment III (ROTSE-III). Our GRB sample is divided into two sub-samples: detected afterglows (18 GRBs) and those with upper limits (40 GRBs). We derive R-band fluxes for these two sub-samples 100 s after the onset of the burst. The optical LFs at 100 s are fitted by assuming that the co-moving GRB rate traces the star formation rate. While fitting the optical LFs using Monte Carlo simulations, we take into account the detection …


Attosecond Transient Absorption Probing Of Electronic Superpositions Of Bound States In Neon: Detection Of Quantum Beats, Annelise R. Beck, Birgitta Bernhardt, Erika R. Warrick, Mengxi Wu, Shaohao Chen, Mette B. Gaarde, Kenneth J. Schafer, Daniel M. Neumark, Stephen R. Leone Nov 2014

Attosecond Transient Absorption Probing Of Electronic Superpositions Of Bound States In Neon: Detection Of Quantum Beats, Annelise R. Beck, Birgitta Bernhardt, Erika R. Warrick, Mengxi Wu, Shaohao Chen, Mette B. Gaarde, Kenneth J. Schafer, Daniel M. Neumark, Stephen R. Leone

Faculty Publications

Electronic wavepackets composed of multiple bound excited states of atomic neon lying between 19.6 and 21.5 eV are launched using an isolated attosecond pulse. Individual quantum beats of the wavepacket are detected by perturbing the induced polarization of the medium with a time-delayed few-femtosecond near-infrared (NIR) pulse via coupling the individual states to multiple neighboring levels. All of the initially excited states are monitored simultaneously in the attosecond transient absorption spectrum, revealing Lorentzian to Fano lineshape spectral changes as well as quantum beats. The most prominent beating of the several that were observed was in the spin-orbit split 3d absorption …