cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Structural and Mutational Analysis of Substrate Complexation by Anthranilate Phosphoribosyltransferase from Sulfolobus solfataricus
Creators: name: Marino, Marco
name: Deuss, Miriam
name: Svergun, Dmitri I.
name: Konarev, Petr V.
name: Sterner, Reinhard
name: Mayans, Olga
Publisher: name: Universität Regensburg
Year: 2006
Subjects: subject: 570 Biowissenschaften, Biologie

description: The metabolic synthesis and degradation of essential nucleotide compounds are primarily carried out by phosphoribosyltransferases (PRT) and nucleoside phosphorylases (NP), respectively. Despite the resemblance of their reactions, five classes of PRTs and NPs exist, where anthranilate PRT (AnPRT) constitutes the only evolutionary link between synthesis and degradation processes. We have characterized the active site of dimeric AnPRT from Sulfolobus solfataricus by elucidating crystal structures of the wild-type enzyme complexed to its two natural substrates anthranilate and 5-phosphoribosyl-1-pyrophosphate/Mg2+. These bind into two different domains within each protomer and are brought together during catalysis by rotational domain motions as shown by small angle x-ray scattering data. Steady-state kinetics of mutated AnPRT variants address the role of active site residues in binding and catalysis. Results allow the comparative analysis of PRT and pyrimidine NP families and expose related structural motifs involved in nucleotide/nucleoside recognition by these enzyme families.
Leptonic Electroweak Spin-Torsion Interactions
Creators: name: Fabbri, Luca
Publisher: name: arXiv
Year: 2010
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: In this paper we consider the most general field equations for a system of two fermions of which one single-handed, showing that the spin-torsion interactions among these spinors have a structure identical to that of the electroweak forces among leptons; possible extensions are discussed.
description: 7 pages
Electron spin synchronization induced by optical nuclear magnetic resonance feedback
Creators: name: Glazov, M. M.
name: Yugova, I. A.
name: Efros, Al. L.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We predict a new physical mechanism explaining the electron spin precession frequency focusing effect observed recently in singly charged quantum dots exposed to a periodic train of resonant circularly polarized short optical pulses [A. Greilich et al, Science 317, 1896 (2007), Ref. 1]. We show that electron spin precession in an external magnetic field and a field of nuclei creates a Knight field oscillating at the frequency of nuclear spin resonance. This field drives the projection of the nuclear spin onto magnetic field to the value that makes the electron spin precession frequency a multiple of the train cyclic repetition frequency, which is the condition at which the Knight field vanishes.
description: 4+ pages, 3 figures
What does diaspore morphology tell us about external animal dispersal? Evidence from standardized experiments measuring seed retention on animal-coats
Creators: name: Tackenberg, Oliver
name: Römermann, Christine
name: Thompson, Ken
name: Poschlod, Peter
Publisher: name: Universität Regensburg
Year: 2006
Subjects: subject: Long distance dispersal; Seed dispersal; Epizoochory; Seed traits; Seed mass; Seed size; Seed shape; Sheep; Cattle; Functional traits
subject: 580 Pflanzen (Botanik)

description: It is generally assumed that morphological structures like awns, bristles, or hooks increase retention potential of plant diaspores to the coats of animals, but this basic assumption has rarely been tested. In this paper we introduce a lab-experiment in which detachment rates of diaspores from mechanically shaken animal coats are measured using a standardized protocol and compared with detachment rates measured under natural conditions. The lab-experiments were used to assess ‘retention potentials’ of diaspores for more than 100 plant species. ‘Retention potential’ is defined as the proportion of diaspores still attached to the animal coat after a certain time period. We assessed the effect of several diaspore traits on retention potential and found that a strong negative effect of diaspore mass overrides the expected positive effect of structures like awns, bristles or hooks. However, a positive effect of these structures was proven, when analysing the dataset separately for diaspores of different mass classes. Additionally, we found a negative effect of flat appendages. Coat type also affects retention potentials, with higher values in curly sheep wool compared to straight cattle hair. Species with diaspore mass <2 mg had a fair chance to be dispersed in curly wool as well as in straight hair over long distances, once they get attached to the animal-coat. However, some species with diaspore mass >2 mg might also be dispersed over long distances, at least by sheep. The frequency distribution of retention potentials clearly shows that a binary classification of species dispersed in animal hair vs. species not dispersed is artificial since differences are gradual. The relative importance of diaspore mass for determining retention potential was higher in straight hair, whereas diaspore morphology had a relatively higher impact in curly wool. Hence, different sets of plant species are dispersed by different animals.
Supercurrent through grain boundaries in the presence of strong correlations
Creators: name: Wolf, F. A.
name: Graser, S.
name: Loder, F.
name: Kopp, T.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: Strong correlations are known to severely reduce the mobility of charge carriers near half-filling and thus have an important influence on the current carrying properties of grain boundaries in the high-$T_c$ cuprates. In this work we present an extension of the Gutzwiller projection approach to treat electronic correlations below as well as above half-filling consistently. We apply this method to investigate the critical current through grain boundaries with a wide range of misalignment angles for electron- and hole-doped systems. For the latter excellent agreement with experimental data is found. We further provide a detailed comparison to an analogous weak-coupling evaluation.
description: 4 pages, 3 figures
Lyashko-Looijenga morphisms and submaximal factorisations of a Coxeter element
Creators: name: Ripoll, Vivien
Publisher: name: arXiv
Year: 2010
Subjects: subject: Combinatorics (math.CO)
subject: Group Theory (math.GR)
subject: FOS: Mathematics

description: When W is a finite reflection group, the noncrossing partition lattice NCP_W of type W is a rich combinatorial object, extending the notion of noncrossing partitions of an n-gon. A formula (for which the only known proofs are case-by-case) expresses the number of multichains of a given length in NCP_W as a generalised Fuss-Catalan number, depending on the invariant degrees of W. We describe how to understand some specifications of this formula in a case-free way, using an interpretation of the chains of NCP_W as fibers of a Lyashko-Looijenga covering (LL), constructed from the geometry of the discriminant hypersurface of W. We study algebraically the map LL, describing the factorisations of its discriminant and its Jacobian. As byproducts, we generalise a formula stated by K. Saito for real reflection groups, and we deduce new enumeration formulas for certain factorisations of a Coxeter element of W.
description: 18 pages. Version 2 : corrected typos and improved presentation. Version 3 : corrected typos, added illustrated example. To appear in Journal of Algebraic Combinatorics
Emergent Spin Liquids in the Hubbard Model on the Anisotropic Honeycomb Lattice
Creators: name: Wang, Guangquan
name: Goerbig, Mark O.
name: Miniatura, Christian
name: Gremaud, Benoit
Publisher: name: arXiv
Year: 2010
Subjects: subject: Quantum Gases (cond-mat.quant-gas)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We study the repulsive Hubbard model on an anisotropic honeycomb lattice within a mean-field and a slave-rotor treatment. In addition to the known semi-metallic and band-insulating phases, obtained for very weak interactions, and the anti-ferromagnetic phase at large couplings, various insulating spin-liquid phases develop at intermediate couplings. Whereas some of these spin liquids have gapless spinon excitations, a gapped one occupies a large region of the phase diagram and becomes the predominant phase for large hopping anisotropies. This phase can be understood in terms of weakly-coupled strongly dimerized states.
description: 6 pages, 4 figures; free-energy analysis of the competing phases added; published version
Metabolic and cardiovascular benefits of high-intensity interval training in type 2 diabetes
Creators: name: Francois, Monique Emily
Publisher: name: University of British Columbia
Year: 2018

description: High-intensity interval training (HIIT), comprised of alternating periods of brief high- and low-intensity exercise, has been shown to rapidly improve metabolic and cardiovascular health. As such, HIIT may provide a sufficient exercise stimulus to reduce cardiovascular risk in type 2 diabetes (T2D). Several studies have shown that HIIT is effective for improving glucose control and cardiorespiratory fitness. However, the acute and chronic effects of HIIT on the vasculature of individuals with T2D have yet to be established. The addition of post-exercise nutritional supplementation with high-quality protein from milk has previously been shown to augment favorable body composition changes with exercise interventions, which could promote further improvements in glycemic control and reduce cardiovascular risk factors in older adults with T2D. This thesis examines the impact of acute HIIT on vascular endothelial function, and the chronic metabolic and cardiovascular adaptations to HIIT with or without a post-exercise nutritional beverage, in individuals with T2D. In a randomized clinical trial, fifty-three individuals with T2D completed 12 weeks of low-volume HIIT (4-10 X 1 min intervals) with post-exercise nutritional support of non-fat milk, milk-protein concentrate or flavored water (placebo) beverage. Separately, thirty-five age-matched older adults (12 T2D, 12 untrained normoglycemic, and 11 trained normoglycemic) completed an acute session of cycling HIIT, leg resistance HIIT, or resting control. The principal findings of this thesis were: a) 12 weeks of HIIT improved glucose control, body composition, cardiorespiratory fitness and vascular function in individuals with T2D, b) no additive effects were observed with post-exercise milk or milk-protein supplementation, and c) acute resistance or cardio-based HIIT improves endothelial function in individuals with T2D. Noteworthy, the changes in blood pressure, arterial stiffness, femoral intima-media thickness and endothelial function were likely clinically beneficial based on magnitude based inferences that are associated with ~15-30% reductions in future cardiovascular events. Therefore, HIIT may be an effective means to reduce the burden of cardiovascular complications in T2D.
$Λ_c N$ bound states revisited
Creators: name: Liu, Yan-Rui
name: Oka, Makoto
Publisher: name: arXiv
Year: 2011
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Experiment (hep-ex)
subject: High Energy Physics - Lattice (hep-lat)
subject: Nuclear Experiment (nucl-ex)
subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: The one-boson exchange potential model for $Λ_cN$ is constructed and the possibility of $Λ_cN$ bound states is examined. We consider an effective Lagrangian for the charmed baryons, $Λ_c$, $Σ_c$, and $Σ_c^*$, reflecting the heavy quark symmetry, chiral symmetry, and hidden local symmetry. We determine the coupling constants using various methods. With the derived nonrelativistic potentials, we study the bound state problem of the $Λ_cN$ system and relevant coupled channel effects. It is found that molecular bound states of $Λ_cN$ are plausible, for which the channel couplings of $Σ_cN$ and $Σ_c^*N$ are essential.
description: 25 pages, 8 figures, 15 tables; publication version
Statistical Description of Eigenfunctions in Chaotic and Weakly Disordered Systems beyond Universality
Creators: name: Urbina, Juan Diego
name: Richter, Klaus
Publisher: name: Universität Regensburg
Year: 2006
Subjects: subject: 530 Physik
subject: 05.45.Mt
subject: 03.65.Sq

description: We present a semiclassical approach to eigenfunction statistics in chaotic and weakly disordered quantum systems which goes beyond random matrix theory, supersymmetry techniques, and existing semiclassical methods. The approach is based on a generalization of Berry’s random wave model, combined with a consistent semiclassical representation of spatial two-point correlations. We derive closed expressions for arbitrary wave-function averages in terms of universal coefficients and sums over classical paths, which contain, besides the supersymmetry results, novel oscillatory contributions. Their physical relevance is demonstrated in the context of Coulomb blockade physics.
Characterization of the Livestock Production Systems and the Potential of Feed-based Interventions for Improving Livestock Productivity in Ol'lessos Division of Nandy County (Kenya)
Creators: name: Wafula, Sylvia
name: Kirui, Josephine
name: Lukuyu, Ben
Publisher: name: Gates Open Research
Year: 2019

description: Characterization of the Livestock Production Systems and the Potential of Feed-based Interventions for Improving Livestock Productivity in Ol'lessos Division of Nandy County (Kenya)
Decay rates of planar helium
Creators: name: Madroñero, J .
name: Schlagheck, Peter
name: Hilico, L.
name: Grémaud, B.
name: Delande, D.
name: Buchleitner, A.
Publisher: name: Universität Regensburg
Year: 2005
Subjects: subject: 530 Physik

description: We compare the autoionization rates of characteristic configurations of the doubly excited helium atom, in one, two and three dimensions. We find that the decay rates of the two-dimensional restriction are in quantitative agreement with those of the real physical system, whilst the one-dimensional model can underestimate the actual decay rates by orders of magnitude.
Proposal of a microwave-driven semiconductor superlattice oscillator for generation of THz radiation
Creators: name: Klappenberger, Florian
name: Renk, Karl Friedrich
Publisher: name: Universität Regensburg
Year: 2004
Subjects: subject: Semiconductor superlattice; Bloch oscillations; THz radiation
subject: 530 Physik

description: We present the proposal of a microwave-driven semiconductor superlattice oscillator. We show that the interplay of a microwave pump field with a synchronous harmonic field can make a semiconductor superlattice to a gain medium for the harmonic field. Placing the superlattice in a resonator for the harmonic field allows the operation of an oscillator. The gain mechanism is based on Bloch oscillations of miniband electrons. The gain is mediated either by the interaction of the high-frequency field with the single electrons or with space charge domains or with both. The microwave-driven superlattice oscillator should be suitable for generation of coherent radiation up to several THz.
Precision cosmology with a wide area XMM cluster survey
Creators: name: Pierre, M.
name: Pacaud, F.
name: Juin, J. B.
name: Melin, J. B.
name: Clerc, N.
name: Corasaniti, P. S.
Publisher: name: arXiv
Year: 2010
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: We explore the cosmological constraints expected from wide area XMM-type cluster surveys covering 50-200 deg2, under realistic observing conditions. We perform a Fisher matrix analysis based on cluster number counts in combination with estimates of the 2-point cluster correlation function. The effect of the survey design is implemented through an observationally well tested cluster selection function. Special attention is given to the modelling of the shot noise and sample variance, which we estimate by applying our selection function to numerically simulated surveys. We then infer the constraints on the equation of state of the dark energy considering various survey configurations. We quantitatively investigate the respective impact of the cluster mass measurements, of the correlation function and of the 1
description: Published in MNRAS. (minor changes with respect to the initial version)
Novel Bis(oxazole) Pincer Ligands for Catalysis: Application in Suzuki-Miyaura Cross Coupling Reactions under Aerobic Conditions
Creators: name: Luo, Qunli
name: Eibauer, Stefan
name: Reiser, Oliver
Publisher: name: Universität Regensburg
Year: 2007
Subjects: subject: Bis(oxazoles); Pincer ligands; Suzuki-Miyaura cross coupling; Palladium; Biaryls
subject: 540 Chemie

description: Introducing bis(oxazole) ligands to catalysis: novel bis(oxazole) ligands could be readily synthesized from isophthaloyl dichlorides and ethyl glycinate hydrochlorides or 6-aminoacetophenone hydrochloride. Their corresponding pincer palladium complexes proved to be extremely robust catalysts for Suzuki-Miyaura cross coupling reactions, allowing the synthesis of biaryls under aerobic conditions with turn over numbers of up to 790,000 and turn over frequencies of up to 49,000 h−1.
$ε$-isomorphisms for rank one $(φ,Γ)$-modules over Lubin-Tate Robba rings
Creators: name: Malcic, Milan
name: Steingart, Rustam
name: Venjakob, Otmar
name: Witzelsperger, Max
Publisher: name: arXiv
Year: 2024
Subjects: subject: Number Theory (math.NT)
subject: FOS: Mathematics
subject: 11F80

description: Inspired by Nakamura's work (arXiv:1305.0880) on $ε$-isomorphisms for $(φ,Γ)$-modules over (relative) Robba rings with respect to the cyclotomic theory, we formulate an analogous conjecture for $L$-analytic Lubin-Tate $(φ_L,Γ_L)$-modules over (relative) Robba rings for any finite extension $L$ of $\mathbb{Q}_p.$ In contrast to Kato's and Nakamura's setting, our conjecture involves $L$-analytic cohomology instead of continuous cohomology within the generalized Herr complex. Similarly, we restrict to the identity components of $D_{cris}$ and $D_{dR},$ respectively. For rank one modules of the above type or slightly more generally for trianguline ones, we construct $ε$-isomorphisms for their Lubin-Tate deformations satisfying the desired interpolation property.
description: Published version, page number different from published version
The Constrained Amino Acid β-Acc Confers Potency and Selectivity to Integrin Ligands
Creators: name: Urman, Sylwia
name: Gaus, Katharina
name: Yang, Yi
name: Strijowski, Ulf
name: Sewald, Norbert
name: De Pol, Silvia
name: Reiser, Oliver
Publisher: name: Universität Regensburg
Year: 2007
Subjects: subject: amino acids; conformational analysis; integrins; peptides; structure-activity relationships
subject: 540 Chemie

description: Auch erschienen als: Urman, Sylwia; Gaus, Katharina; Yang, Yi; Strijowski, Ulf; Sewald, Norbert; De Pol, Silvia; Reiser, Oliver (2007) Die gerüststarre Aminosäure β-Acc verleiht Integrinliganden Aktivität und Selektivität. Angewandte Chemie, 119(21). pp. 4050-4053.
Excitation of the porous silicon photoluminescence by a multiphoton vibronic process
Creators: name: Diener, J.
name: Ben-Chorin, M.
name: Kovalev, D.
name: Ganichev, Sergey
name: Koch, F.
Publisher: name: Universität Regensburg
Year: 1996
Subjects: subject: Luminescence; Optical properties; Silicon
subject: 530 Physik

description: We study the emission of photons from porous Si after high-level vibrational excitation in the Si---O absorption band using a pulsed CO2 laser. Narrow resonances in the efficiency of light generation are discovered at 1030 cm−1 and 1084 cm−1. For excitation at 1030 cm−1 the familiar photoluminescence band of porous Si appears. Time-resolved pump-to-probe experiments show the same decay times for the photo and the IR-induced luminescence. We suggest a microscopic process responsible for the light emission.
MPEC 2023-H245 : 2023 HW6
Creators: name: Minor Planet Center Staff
Publisher: name: The Minor Planet Center
Year: 2023
Subjects: subject: Small Solar System bodies
valueUri: http://astrothesaurus.org/uat/1469
subject: 2023 HW6

description: The Minor Planet Electronic Circulars contain information on unusual minor planets, routine data on comets and natural satellites, and occasional editorial announcements.  They are published on behalf of Division F of the International Astronomical Union by the Minor Planet Center, Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A.
Tensorial representations of Reynolds-stress pressure-strain redistribution
Creators: name: Gerolymos, G. A.
name: Lo, C.
name: Vallet, I.
Publisher: name: arXiv
Year: 2010
Subjects: subject: Fluid Dynamics (physics.flu-dyn)
subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: The purpose of the present note is to contribute in clarifying the relation between representation bases used in the closure for the redistribution (pressure-strain) tensor $ϕ_{ij}$, and to construct representation bases whose elements have clear physical significance. The representation of different models in the same basis is essential for comparison purposes, and the definition of the basis by physically meaningfull tensors adds insight to our understanding of closures. The rate-of-production tensor can be split into production by mean strain and production by mean rotation $P_{ij}=P_{\bar S_{ij}}+P_{\barΩ_{ij}}$. The classic representation basis $\mathfrak{B}[\tsr{b}, \tsrbar{S}, \tsrbarΩ]$ of homogeneous turbulence {\em [{\em eg} Ristorcelli J.R., Lumley J.L., Abid R.: {\it J. Fluid Mech.} {\bf 292} (1995) 111--152]}, constructed from the anisotropy $\tsr{b}$, the mean strain-rate $\tsrbar{S}$, and the mean rotation-rate $\tsrbarΩ$ tensors, is interpreted, in the present work, in terms of the relative contributions of the deviatoric tensors $P^{(\mathrm{dev})}_{\bar S_{ij}}:=P_{\bar S_{ij}}-\tfrac{2}{3}P_\mathrm{k}δ_{ij}$ and $P^{(\mathrm{dev})}_{\barΩ_{ij}}:=P_{\barΩ_{ij}}$. Different alternative equivalent representation bases, explicitly using $P^{(\mathrm{dev})}_{\bar S_{ij}}$ and $P_{\barΩ_{ij}}$ are discussed, and the projection rules between bases are caclulated, using a matrix-based systematic procedure. An initial term-by-term {\em a priori} investigation of different second-moment closures is undertaken.
description: ASME J. Appl. Mech. (in print); final version; 10 pages, 2 Figs
A comparative discursive pragmatic approach to third person referential forms in digital Korean and Japanese Comfort Women discourses.
Creators: name: Sluchinski, Kerry
Publisher: name: figshare
Year: 2020
Subjects: subject: 200405 Language in Culture and Society (Sociolinguistics)
subject: FOS: Languages and literature
subject: Linguistics
subject: 200403 Discourse and Pragmatics

description: Abstract for presentation to be given at IPrA 2021 - involves referential forms in a cross linguistic context and the role translation plays in the manipulation of discourse. Languages: Japanese, Korean.
Spectral hole burning on silicon phthalocyanines isolated in an argon matrix
Creators: name: Braun, Dieter
name: Ceulemans, Arnout
name: Dick, Bernhard
name: Konami, Hideo
Publisher: name: Universität Regensburg
Year: 1994
Subjects: subject: Spectral hole burning (on silicon phthalocyanines isolated in argon matrix); Exciton (spectral hole burning on silicon phthalocyanines isolated in argon matrix in relation to); silicon phthalocyanine hole burning argon matrix
subject: 540 Chemie

description: Irradn. of the monomeric phthalocyanine Hex3SiO(SiPc)OSiHex3 isolated in an Ar matrix at T = 13 K with the 632.8 nm line of a He/Ne laser produces a resonant spectral hole in the vibrational sideband located .apprx.700 cm-1 above the origin of the Q band. This hole is accompanied by several sideholes in the origin region. These permit a precise detn. of several excited-state vibrational frequencies. For dimeric Hex3SiO(SiPc-O-SiPc)OSiHex3 in the same matrix the changes in the absorption spectra after irradn. into the Q band reveal an out-of-plane polarization of the bands which are not present in the monomer absorption. This points to substantial charge-resonance contributions to the excitonic coupling between the 2 SiPc units in dimeric Hex3SiO(SiPc-O-SiPc)OSiHex3.
description: CAN 121:267508 74-1 Radiation Chemistry, Photochemistry, and Photographic and Other Reprographic Processes 92984-77-5 Role: FMU (Formation, unclassified), PRP (Properties), FORM (Formation, nonpreparative) (formation from spectral hole burning on silicon phthalocyanines isolated in argon matrix); 92396-89-9 Role: PRP (Properties), RCT (Reactant), RACT (Reactant or reagent) (spectral hole burning in argon matrix-isolated)
On the algebra of equal-input matrices in time-inhomogeneous Markov flows
Creators: name: Baake, Michael
name: Sumner, Jeremy
Publisher: name: arXiv
Year: 2024
Subjects: subject: Probability (math.PR)
subject: Classical Analysis and ODEs (math.CA)
subject: FOS: Mathematics
subject: 60J27, 34A05, 15A16

description: Markov matrices of equal-input type constitute a widely used model class. The corresponding equal-input generators span an interesting subalgebra of the real matrices with zero row sums. Here, we summarise some of their amazing properties and discuss the corresponding Markov embedding problem, both homogeneous and inhomogeneous in time. In particular, we derive exact and explicit solutions for time-inhomogeneous Markov flows with non-commuting generator families of equal-input type and beyond.
description: 18 pages, with an appendix on Peano--Baker series and Magnus expansion; slightly revised and improved version
Metric Compatible or Noncompatible Finsler-Ricci Flows
Creators: name: Vacaru, Sergiu I.
Publisher: name: arXiv
Year: 2011
Subjects: subject: General Physics (physics.gen-ph)
subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences
subject: 53C55, 53C60, 53D15, 83C15

description: There were elaborated different models of Finsler geometry using the Cartan (metric compatible), or Berwald and Chern (metric non-compatible) connections, the Ricci flag curvature etc. In a series of works, we studied (non)commutative metric compatible Finsler and nonholonomic generalizations of the Ricci flow theory [see S. Vacaru, J. Math. Phys. 49 (2008) 043504; 50 (2009) 073503 and references therein]. The goal of this work is to prove that there are some models of Finsler gravity and geometric evolution theories with generalized Perelman's functionals, and correspondingly derived nonholonomic Hamilton evolution equations, when metric noncompatible Finsler connections are involved. Following such an approach, we have to consider distortion tensors, uniquely defined by the Finsler metric, from the Cartan and/or the canonical metric compatible connections. We conclude that, in general, it is not possible to elaborate self-consistent models of geometric evolution with arbitrary Finsler metric noncompatible connections.
description: latex2e, v3 accepted to IJGMMP is a shorten variant following requests of Editor; readers are suggested to see former variants for details of proofs and Tables 1 and 2
Automatic BLAS Offloading on Unified Memory Architecture: A Study on NVIDIA Grace-Hopper
Creators: name: Li, Junjie
name: Wang, Yinzhi
name: Liang, Xiao
name: Liu, Hang
Publisher: name: arXiv
Year: 2024
Subjects: subject: Distributed, Parallel, and Cluster Computing (cs.DC)
subject: FOS: Computer and information sciences

description: Porting codes to GPU often requires major efforts. While several tools exist for automatically offload numerical libraries such as BLAS and LAPACK, they often prove impractical due to the high cost of mandatory data transfer. The new unified memory architecture in NVIDIA Grace-Hopper allows high bandwidth cache-coherent memory access of all memory from both CPU and GPU, potentially eliminating bottleneck faced in conventional architecture. This breakthrough opens up new avenues for application development and porting strategies. In this study, we introduce a new tool for automatic BLAS offload, the tool leverages the high speed cache coherent NVLink C2C interconnect in Grace-Hopper, and enables performant GPU offload for BLAS heavy applications with no code changes or recompilation. The tool was tested on two quantum chemistry or physics codes, great performance benefits were observed.
What is known about biophysics in Karate? A scoping review with evidence gap map
Creators: name: Loureiro, Manuel
name: Afonso, José
name: Neto, Bruno Tiago Pereira Lopes
Publisher: name: Open Science Framework
Year: 2023
Subjects: subject: Physical Sciences and Mathematics
subject: Medicine and Health Sciences

description: A scoping review about biophysics in karate with an evidence gap map
The effectiveness of heated sodium hypochlorite on Enterococcus faecalis in infected dentinal tubules
Creators: name: Nio, Stefanie
Publisher: name: University of British Columbia
Year: 2017

description: Introduction: The goal of chemical irrigation in endodontics is to maximize the reduction of microbes and necrotic tissue remnants in the root canal system. Enterococcus faecalis is most frequently associated with persistent endodontic infections. Sodium hypochlorite (NaOCl) is the most commonly used root canal irrigant. Heating NaOCl has a positive effect on the tissue dissolving abilities of the solution. Objective: The aim of this study was to compare the killing effectiveness of two different sodium hypochlorite concentrations (2 % vs. 5.25 %) at two different temperatures (20 °C vs. 60 °C) against two strains of E. faecalis biofilm at different ages of maturation (3 days vs. 3 weeks), in a previously described dentin block model. Hypotheses: Temperature, concentration, the exposure time, the age of the biofilm nor the strain of E. faecalis have no effect on the killing efficacy of NaOCl on E. faecalis. Methods: Dentin blocks were prepared from human root dentin. Two E. faecalis strains were introduced into dentinal tubules by centrifugation and incubated to form biofilms. After 3 days and 3 weeks of growth, the E. faecalis dentin biofilm samples were exposed to sterile water, 2 %, and 5.25 % NaOCl for 3 and 10 minutes at room temperature (20 °C) and at 60 °C. After the exposure, the proportions of killed bacteria in dentin canals were assessed by viability staining and confocal laser scanning microscopy. Results: The killing efficacy of E. faecalis in dentin tubules was affected by an increase in temperature of the NaOCl solution. The concentration of the NaOCl solution and exposure time to the irrigant played a role in the killing efficacy of NaOCl. Overall, 5.25 % NaOCl demonstrated a greater effect on the killing efficacy on E. faecalis, except when NaOCl is used at 60 °C with an exposure time of 10 minutes. There was no significant difference (p>0.5) between the two different strains of E. faecalis or between the 3-day and 3-week old biofilms in their sensitivity to the bactericidal effect of NaOCl. Conclusion: Bacterial killing by NaOCl is enhanced by an increase in temperature and concentration.
Deformed Hamiltonian Floer theory, capacity estimates, and Calabi quasimorphisms
Creators: name: Usher, Michael
Publisher: name: arXiv
Year: 2010
Subjects: subject: Symplectic Geometry (math.SG)
subject: FOS: Mathematics
subject: 53D40, 53D45

description: We develop a family of deformations of the differential and of the pair-of-pants product on the Hamiltonian Floer complex of a symplectic manifold (M,ω) which upon passing to homology yields ring isomorphisms with the big quantum homology of M. By studying the properties of the resulting deformed version of the Oh-Schwarz spectral invariants, we obtain a Floer-theoretic interpretation of a result of Lu which bounds the Hofer-Zehnder capacity of M when M has a nonzero Gromov-Witten invariant with two point constraints, and we produce a new algebraic criterion for (M,ω) to admit a Calabi quasimorphism and a symplectic quasi-state. This latter criterion is found to hold whenever M has generically semisimple quantum homology in the sense considered by Dubrovin and Manin (this includes all compact toric M), and also whenever M is a point blowup of an arbitrary closed symplectic manifold.
description: 73 pages, 1 color figure. Added new material explaining how to make some of the constructions on semipositive manifolds without using Kuranishi structures
The T1 state of p-nitroaniline and related molecules: a CNDO/S study
Creators: name: Bigelow, Richard W.
name: Freund, Hans Joachim
name: Dick, Bernhard
Publisher: name: Universität Regensburg
Year: 1983
Subjects: subject: Electron configuration (of nitrianilines and related compds.); Molecular orbital (CNDO/S, of nitroaniline and related compds.); Energy level (triplet, of nitroaniline and related compds.); triple energy level nitroaniline; MO nitroaniline
subject: 540 Chemie

description: The nature of the lowest energy triplet state (T1) of p-nitroaniline (PNA), N,N-dimethyl-p-nitroaniline (DMPNA) and nitrobenzene (NB) is reexamd. using the semiempirical CNDO/S-CI method with selected parameter options. In the case of the unperturbed mols. the short-axis polarized p* A- singlet excitation. Computations suggest, however, that polar solvents strongly stabilize the PNA and DMPNA p*
description: CAN 99:104467 22-2 Physical Organic Chemistry 98-95-3; 100-01-6; 100-23-2 Role: PRP (Properties) (lowest energy triplet state of, calcns. of)
Identifying the characteristics of moderate drinkers: an exploratory study
Creators: name: Dunn, Shannon
Publisher: name: University of British Columbia
Year: 2017

description: A review of the literature on drinking behaviour of university students reveals that most research focuses on binge drinking behaviour: a serious concern that has the attention of the World Health Organization. Binge drinking is of particular concern for university students as they are a high risk subset in an already high risk age group. This thesis explores the characteristics of university students who choose to drink moderately in this otherwise high risk environment. The purpose of this exploratory study is to better understand who the moderate drinkers are, what are their consumption habits and what are their perceptions of alcohol and the alcohol consumption of their peers? This study is informed by two theoretically frameworks: positive psychology as the overarching lens focusing on those students who drink responsibly and social norm theory which holds that students are influenced by what they perceive others to be doing and thereby alter their own behaviour and thoughts to meet this perception. The participants are composed of three hundred and forty-eight undergraduate students registered in their first year of study living in on-campus university residences. Data is collected using an on-line survey including both forced choice and open-ended response questions. According to participant’s self-reported data, over 40% of male participants and 50% of female participants self-identify as moderate drinkers. These moderate drinkers view their relationship with alcohol as either positive or neutral yet highly over-estimate the frequency and consumption levels of alcohol of their peers and do not perceive that any of their peers abstain from alcohol. The findings further reveal that moderate drinkers see themselves as unique from their peer group. Self-identified moderate drinkers rarely feel pressure to drink more, feel alcohol has little or no importance to them in social settings and do not consider drinking habits as a factor in selecting their choice of friends. Self-identified moderate drinkers were consistent with prior research findings in over-estimating the consumption of their peers but do not appear to allow this misperception to influence their own drinking habits.
Modelling geomagnetic bird navigation
Creators: name: Zein, Beate
Publisher: name: The University of St Andrews
Year: 2023
Subjects: Bird migration
Geomagnetic values
Navigation
Satellite data

description: Geomagnetic navigation is a complex process which has been studied in experimental behaviour and observation studies. However, to date there have been relatively few modelling studies, and all have used geomagnetic data that don’t account for fine-scale dynamics of the geomagnetic field. The objective of this thesis is to study avian migratory navigation using novel data-driven approaches based on high-resolution contemporaneous and co-located geomagnetic and bird tracking data. Two different methods (random walk models, RWM and step selection analysis, SSA) were applied to evaluate the use of geomagnetic navigational strategies by migratory birds alongside geomagnetic cues (intensity, inclination), and to study the effect of abiotic factors on navigation. Both methods incorporated navigational strategies, which were derived from literature and associated with geomagnetic values. For RWM, these were translated into novel probability surfaces (represented as spatial grids) and for SSA into strategy-based covariates. I further investigated the effect of using higher resolution satellite geomagnetic data and found that models significantly improved with their use. Future studies of geomagnetic navigation should therefore use fine-scale geomagnetic data. My studies suggest that the most simplistic navigational compass mechanism (i.e. taxis) based on geomagnetic intensity is a preferred strategy. This is likely the most energy efficient mechanism which is the least prone to changes of the geomagnetic field. Additionally, I studied two different abiotic factors which have been proposed to influence bird navigation: the time of the day and local structure of the geomagnetic field. For both, I found the first empirical evidence for their effects on geomagnetic navigation. My methodologies can be used for direct comparisons of different species migrating in different geographical areas and to study interaction effects with other navigational strategies and environmental factors (e.g. wind). The thesis therefore has a potential for a high impact on the study of migratory navigation.
Generic multiloop methods and application to N=4 super-Yang-Mills
Creators: name: Carrasco, John Joseph M.
name: Johansson, Henrik
Publisher: name: arXiv
Year: 2011
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We review some recent additions to the tool-chest of techniques for finding compact integrand representations of multiloop gauge-theory amplitudes - including non-planar contributions - applicable for N=4 super-Yang-Mills in four and higher dimensions, as well as for theories with less supersymmetry. We discuss a general organization of amplitudes in terms of purely cubic graphs, review the method of maximal cuts, as well as some special D-dimensional recursive cuts, and conclude by describing the efficient organization of amplitudes resulting from the conjectured duality between color and kinematic structures on constituent graphs.
description: 42 pages, 18 figures, invited review for a special issue of Journal of Physics A devoted to "Scattering Amplitudes in Gauge Theories", v2 minor corrections, v3 added references
Step Into the Action: Experience Cricket Like a Pro with Pin-Up's Dynamic Platform!
Creators: name: Asanbekov, Amantai
Publisher: name: Zenodo
Year: 2025

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Paramagnetic Redox Stages of a Bisphane: An ESR and ENDOR Study
Creators: name: Gerson, Fabian
name: König, Burkhard
name: Scholz, Michael
name: Meijere, Armin de
Publisher: name: Universität Regensburg
Year: 1992
Subjects: subject: 540 Chemie

description: Seven redox stages, the dication 12+, the radical cation , the neutral 1, the radical anion , the dianion 12-, the radical trianion , and the tetraanion 14-, are indicated by cyclic voltammetry for the bisphane 1, in which the benzene decks of two lateral paracyclophane moieties are orthogonal to the plane of anthracene framework. In and , the unpaired electron is accommodated into the central anthracene subsystem, and the same statement holds for the two positive or negative charges in 12+ and 12-. Formation of and 1- occurs through admission of additional electrons one-by-one into the two paracyclophane moieties flanking the doubly charged anthracene subsystem in 12-. The above-postulated, successive release or uptake of electrons by the individual parts of the bisphane is in perfect accord with the hyperfine data determined by ESR and ENDOR spectroscopy for , , , as well as for radical ions of suitable reference compounds.
Unitals in $PG(2,q^2)$ with a large 2-point stabiliser
Creators: name: Giuzzi, L.
name: Korchmáros, G.
Publisher: name: arXiv
Year: 2010
Subjects: subject: Combinatorics (math.CO)
subject: Algebraic Geometry (math.AG)
subject: Group Theory (math.GR)
subject: FOS: Mathematics
subject: 51E20, 05B25

description: Let $\cU$ be a unital embedded in the Desarguesian projective plane $\PG(2,q^2)$. Write $M$ for the subgroup of $\PGL(3,q^2)$ which preserves $\cU$. We show that $\cU$ is classical if and only if $\cU$ has two distinct points $P,Q$ for which the stabiliser $G=M_{P,Q}$ has order $q^2-1$.
description: Revised version - clarified the case mu\neq\lambda^{q+1} - 7 pages
XV Международная научно-практическая конференция «Вызовы современности и стратегии развития общества в условиях новой реальности»
Creators: name: ООО "Институт развития образования и консалтинга"
Publisher: name: ООО "Институт развития образования и консалтинга"
Year: 2023

description: XV Международная научно-практическая конференция «Вызовы современности и стратегии развития общества в условиях новой реальности»
Double-Layered 1,4-Distyrylbenzene Chromophores - Synthesis, UV and Fluorescence Spectra
Creators: name: König, Burkhard
name: Knieriem, Burkhard
name: Meijere, Armin de
Publisher: name: Universität Regensburg
Year: 1993
Subjects: subject: Alkene-bromoarene coupling, palladium-catalyzed, Heck-type; [2.2]Paracyclophanes, tetrastyryl-substituted; 1,4-Distyrylbenzene chromphors, double-layered
subject: 540 Chemie

description: The reaction of [2.2]paracyclophane (1) with liquid bromine affords a 1:1 mixture of only two isomeric products, the pseudo-para 2 and pseudo-ortho tetrabromide 3. The structure of the pseudo-para isomer 2 has been determined by X-ray structure analysis. Fourfold palladium-catalyzed coupling with styrenes and with methyl acrylate converts 2 and 3 into double-layered derivatives as e.g. 6a, 7a, and 7b, respectively. The molecular structure of 7a has been established by X-ray structure analysis. The UV and fluorescence spectra of a variety of substituted products are reported and compared with those of the parent chromophors 2,5-dimethyl-1,4-distyrylbenzene (16) and 2,5-diethyl-1,4-bis(phenylethynyl)benzene (17), respectively.
QED with minimal and nonminimal couplings: on the quantum generation of Lorentz violating terms in the pure photon sector
Creators: name: Gazzola, G.
name: Fargnoli, H. G.
name: Scarpelli, A. P. Baêta
name: Sampaio, Marcos
name: Nemes, M. C.
Publisher: name: arXiv
Year: 2010
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We consider an effective model formed by usual QED (minimal coupling) with the addition of a nonminimal Lorentz violating interaction (proportional to a fixed 4-vector $b_μ$) which may radiatively generate both CPT even and odd terms in the pure gauge sector. We show that gauge invariance from usual QED, considered as a limit of the model for $b_μ\rightarrow 0$, plays an important role in the discussion of the radiatively induced Lorentz violating terms at one-loop order. Moreover, despite the nonrenormalizability of the (effective) model preventing us from readily extending our discussion to higher orders, it is still possible to display the general form of the breaking terms of the photon sector in the on shell limit organized in powers of $b_μ$ which in turn can be considered as a small expansion parameter.
description: Journal reference: J. Phys. G 39 (2012) 035002