cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
The Effect of Large-Scale Structure on the SDSS Galaxy Three-Point Correlation Function
Creators: name: Nichol, R. C.
name: Sheth, R. K.
name: Suto, Y.
name: Gray, A. J.
name: Kayo, I.
name: Wechsler, R. H.
name: Marin, F.
name: Kulkarni, G.
name: Blanton, M.
name: Connolly, A. J.
name: Gardner, J. P.
name: Jain, B.
name: Miller, C. J.
name: Moore, A. W.
name: Pope, A.
name: Pun, J.
name: Schneider, D.
name: Schneider, J.
name: Szalay, A.
name: Szapudi, I.
name: Zehavi, I.
name: Bahcall, N. A.
name: Csabai, I.
name: Brinkmann, J.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We present measurements of the normalised redshift-space three-point correlation function (Q_z) of galaxies from the Sloan Digital Sky Survey (SDSS) main galaxy sample. We have applied our "npt" algorithm to both a volume-limited (36738 galaxies) and magnitude-limited sample (134741 galaxies) of SDSS galaxies, and find consistent results between the two samples, thus confirming the weak luminosity dependence of Q_z recently seen by other authors. We compare our results to other Q_z measurements in the literature and find it to be consistent within the full jack-knife error estimates. However, we find these errors are significantly increased by the presence of the ``Sloan Great Wall'' (at z ~ 0.08) within these two SDSS datasets, which changes the 3-point correlation function (3PCF) by 70% on large scales (s>=10h^-1 Mpc). If we exclude this supercluster, our observed Q_z is in better agreement with that obtained from the 2dFGRS by other authors, thus demonstrating the sensitivity of these higher-order correlation functions to large-scale structures in the Universe. This analysis highlights that the SDSS datasets used here are not ``fair samples'' of the Universe for the estimation of higher-order clustering statistics and larger volumes are required. We study the shape-dependence of Q_z(s,q,theta) as one expects this measurement to depend on scale if the large scale structure in the Universe has grown via gravitational instability from Gaussian initial conditions. On small scales (s <= 6h^-1 Mpc), we see some evidence for shape-dependence in Q_z, but at present our measurements are consistent with a constant within the errors (Q_z ~ 0.75 +/- 0.05). On scales >10h^-1 Mpc, we see considerable shape-dependence in Q_z.
description: Accepted for publication in MNRAS
Multi-Agent Deep Reinforcement Learning for Distributed Resource Management in Wirelessly Powered Communication Networks
Creators: name: Hwang, Sangwon
name: Kim, Hanjin
name: Lee, Hoon
name: Lee, Inkyu
Publisher: name: arXiv
Year: 2020
Subjects: subject: Information Theory (cs.IT)
subject: FOS: Computer and information sciences

description: This paper studies multi-agent deep reinforcement learning (MADRL) based resource allocation methods for multi-cell wireless powered communication networks (WPCNs) where multiple hybrid access points (H-APs) wirelessly charge energy-limited users to collect data from them. We design a distributed reinforcement learning strategy where H-APs individually determine time and power allocation variables. Unlike traditional centralized optimization algorithms which require global information collected at a central unit, the proposed MADRL technique models an H-AP as an agent producing its action based only on its own locally observable states. Numerical results verify that the proposed approach can achieve comparable performance of the centralized algorithms.
description: 6 pages double column, 5 figures
2017. J. Francis, ‘Roman Influence on Greek Sphakia,’ in D. Rupp and J. Tomlinson (eds) From Maple to Olive: Proceedings of a Colloquium to Celebrate the 40th Anniversary of the Canadian Institute in Greece, Athens 10-11 June 2016, Athens: Publication of the Canadian Institute in Greece 10, 505–533
Creators: name: Sphakia Survey
Publisher: name: University of Oxford
Year: 2024
Subjects: classificationCode: 430104
subject: Archaeology of Europe, the Mediterranean and the Levant
classificationCode: 430305
subject: Classical Greek and Roman history
classificationCode: 430307
subject: Environmental history
classificationCode: 430308
subject: European history (excl. British, classical Greek and Roman)

description: 2017. J. Francis, ‘Roman Influence on Greek Sphakia,’ in D. Rupp and J. Tomlinson (eds) From Maple to Olive: Proceedings of a Colloquium to Celebrate the 40th Anniversary of the Canadian Institute in Greece, Athens 10-11 June 2016, Athens: Publication of the Canadian Institute in Greece 10, 505–533
MOST detects variability on tau Bootis possibly induced by its planetary companion
Creators: name: Walker, Gordon A. H.
name: Croll, Bryce
name: Matthews, Jaymie M.
name: Kuschnig, Rainer
name: Huber, Daniel
name: Weiss, Werner W.
name: Shkolnik, Evgenya
name: Rucinski, Slavek M.
name: Guenther, David B.
name: Moffat, Anthony F. J.
name: Sasselov, Dimitar
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: (abridged) There is considerable interest in the possible interaction between parent stars and giant planetary companions in 51 Peg-type systems. We demonstrate from MOST satellite photometry and Ca II K line emission that there has been a persistent, variable region on the surface of tau Boo A which tracked its giant planetary companion for some 440 planetary revolutions and lies ~68deg (phi=0.8) in advance of the sub-planetary point. The light curves are folded on a range of periods centered on the planetary orbital period and phase dependent variability is quantified by Fourier methods and by the mean absolute deviation (MAD) of the folded data for both the photometry and the Ca II K line reversals. The region varies in brightness on the time scale of a rotation by ~1 mmag. In 2004 it resembled a dark spot of variable depth, while in 2005 it varied between bright and dark. Over the 123 planetary orbits spanned by the photometry the variable region detected in 2004 and in 2005 are synchronised to the planetary orbital period within 0.0015 d. The Ca II K line in 2001, 2002 and 2003 also shows enhanced K-line variability centered on phi=0.8, extending coverage to some 440 planetary revolutions. The apparently constant rotation period of the variable region and its rapid variation make an explanation in terms of conventional star spots unlikely. The lack of complementary variability at phi=0.3 and the detection of the variable region so far in advance of the sub-planetary point excludes tidal excitation, but the combined photometric and Ca II K line reversal results make a good case for an active region induced magnetically on the surface of tau Boo A by its planetary companion.
description: 7 pages, 7 figures; accepted for publication in A&A
2016. J. Francis, ‘Apiculture in Roman Crete: Local Production and Foreign Export,’ in J. E. Francis and A. Kouremenos (eds) Roman Crete: New Perspectives, Oxford: Oxbow Books, 83–100
Creators: name: Sphakia Survey
Publisher: name: University of Oxford
Year: 2024
Subjects: classificationCode: 430104
subject: Archaeology of Europe, the Mediterranean and the Levant
classificationCode: 430305
subject: Classical Greek and Roman history
classificationCode: 430307
subject: Environmental history
classificationCode: 430308
subject: European history (excl. British, classical Greek and Roman)

description: 2016. J. Francis, ‘Apiculture in Roman Crete: Local Production and Foreign Export,’ in J. E. Francis and A. Kouremenos (eds) Roman Crete: New Perspectives, Oxford: Oxbow Books, 83–100
A spatially explicit model for competition among specialists and generalists in a heterogeneous environment
Creators: name: Lanchier, N.
name: Neuhauser, C.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Probability (math.PR)
subject: FOS: Mathematics
subject: 60K35 (Primary) 82C22 (Secondary)

description: Competition is a major force in structuring ecological communities. The strength of competition can be measured using the concept of a niche. A niche comprises the set of requirements of an organism in terms of habitat, environment and functional role. The more niches overlap, the stronger competition is. The niche breadth is a measure of specialization: the smaller the niche space of an organism, the more specialized the organism is. It follows that, everything else being equal, generalists tend to be more competitive than specialists. In this paper, we compare the outcome of competition among generalists and specialists in a spatial versus a nonspatial habitat in a heterogeneous environment. Generalists can utilize the entire habitat, whereas specialists are restricted to their preferred habitat type. We find that although competitiveness decreases with specialization, specialists are more competitive in a spatial than in a nonspatial habitat as patchiness increases.
description: Published at http://dx.doi.org/10.1214/105051606000000394 in the Annals of Applied Probability (http://www.imstat.org/aap/) by the Institute of Mathematical Statistics (http://www.imstat.org)
Hysteresis phenomenon in turbulent convection
Creators: name: Eidelman, A.
name: Elperin, T.
name: Kleeorin, N.
name: Markovich, A.
name: Rogachevskii, I.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Fluid Dynamics (physics.flu-dyn)
subject: FOS: Physical sciences

description: Coherent large-scale circulations of turbulent thermal convection in air have been studied experimentally in a rectangular box heated from below and cooled from above using Particle Image Velocimetry. The hysteresis phenomenon in turbulent convection was found by varying the temperature difference between the bottom and the top walls of the chamber (the Rayleigh number was changed within the range of $10^7 - 10^8$). The hysteresis loop comprises the one-cell and two-cells flow patterns while the aspect ratio is kept constant ($A=2 - 2.23$). We found that the change of the sign of the degree of the anisotropy of turbulence was accompanied by the change of the flow pattern. The developed theory of coherent structures in turbulent convection (Elperin et al. 2002; 2005) is in agreement with the experimental observations. The observed coherent structures are superimposed on a small-scale turbulent convection. The redistribution of the turbulent heat flux plays a crucial role in the formation of coherent large-scale circulations in turbulent convection.
description: 10 pages, 9 figures, REVTEX4, Experiments in Fluids, 2006, in press
The Zero-Bin and Mode Factorization in Quantum Field Theory
Creators: name: Manohar, Aneesh V.
name: Stewart, Iain W.
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Theory (hep-th)
subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: We study a Lagrangian formalism that avoids double counting in effective field theories where distinct fields are used to describe different infrared momentum regions for the same particle. The formalism leads to extra subtractions in certain diagrams and to a new way of thinking about factorization of modes in quantum field theory. In non-relativistic field theories, the subtractions remove unphysical pinch singularities in box type diagrams, and give a derivation of the known pull-up mechanism between soft and ultrasoft fields which is required by the renormalization group evolution. In a field theory for energetic particles, the soft-collinear effective theory (SCET), the subtractions allow the theory to be defined with different infrared and ultraviolet regulators, remove double counting between soft, ultrasoft, and collinear modes, and give results which reproduce the infrared divergences of the full theory. Our analysis shows that convolution divergences in factorization formulæoccur due to an overlap of momentum regions. We propose a method that avoids this double counting, which helps to resolve a long standing puzzle with singularities in collinear factorization in QCD. The analysis gives evidence for a factorization in rapidity space in exclusive decays.
description: 92 pages, v4- Journal version. Some improvements to language in sections I, IIA, VII
Observational Evidence for Enhanced Black Hole Accretion in Giant Elliptical Galaxies
Creators: name: McDonald, Michael
name: McNamara, Brian R.
name: Calzadilla, Michael S.
name: Chen, Chien-Ting
name: Gaspari, Massimo
name: Hickox, Ryan C.
name: Kara, Erin
name: Korchagin, Ilia
Publisher: name: arXiv
Year: 2020
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: We present a study of the relationship between black hole accretion rate (BHAR) and star formation rate (SFR) in a sample of giant elliptical galaxies. These galaxies, which live at the centers of galaxy groups and clusters, have star formation and black hole activity that is primarily fueled by gas condensing out of the hot intracluster medium. For a sample of 46 galaxies spanning 5 orders of magnitude in BHAR and SFR, we find a mean ratio of log(BHAR/SFR) = -1.45 +/- 0.2, independent of the methodology used to constrain both SFR and BHAR. This ratio is significantly higher than most previously-published values for field galaxies. We investigate whether these high BHAR/SFR ratios are driven by high BHAR, low SFR, or a different accretion efficiency in radio galaxies. The data suggest that the high BHAR/SFR ratios are primarily driven by boosted black hole accretion in spheroidal galaxies compared to their disk counterparts. We propose that angular momentum of the cool gas is the primary driver in suppressing BHAR in lower mass galaxies, with massive galaxies accreting gas that has condensed out of the hot phase on nearly radial trajectories. Additionally, we demonstrate that the relationship between specific BHAR and SFR has much less scatter over 6 orders of magnitude in both parameters, due to competing dependence on morphology between the M_BH--M_* and BHAR--SFR relations. In general, active galaxies selected by typical techniques have sBHAR/sSFR ~ 10, while galactic nuclei with no clear AGN signatures have sBHAR/sSFR ~ 1, consistent with a universal M_BH--M_spheroid relation.
description: 15 pages, 12 figure. Accepted for publication in ApJ
The Arkansas Poll: October 1999
Creators: name: Politics, Diane D. Blair Center Of Southern
Publisher: name: Roper Center for Public Opinion Research
Year: 2021

description: How many years have you lived in Arkansas (1); life in other states before living in Arkansas (1); most pressing issue facing Arkansas (2); job approval of politicians (5); satisfaction with public goods and services in your community (12); effect of new state legislators after introduction of term limits (1); sales tax on groceries (1); legalized casino gambling (1); property taxes in Arkansas (4); local and state taxes (1); gun control (1); abortion (1); constitutional amendment to ban American flag (1); Y2K computer bug problem (1); quality of life in Arkansas (2); Arkansas right direction/wrong track (1); better or worse off financially over a year (2); vote in 1998 election (1); donations/funding for political activity (3); Southern identity (1).
Resolving the inner dust disks surrounding LkCa 15 and MWC 480 at mm wavelengths
Creators: name: Piétu, Vincent
name: Dutrey, Anne
name: Guilloteau, Stéphane
name: Chapillon, Edwige
name: Pety, Jérôme
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We performed sub-arcsecond high-sensitivity nterferometric observations of the thermal dust emission at 1.4 mm and 2.8 mm in the disks surrounding LkCa 15 and MWC 480, with the new 750 m baselines of the IRAM PdBI array. This provides a linear resolution of about 60 AU at the Taurus distance. We report the existence of a cavity of about 50 AU radius in the inner disk of LkCa 15. Whereas LkCa 15 emission is optically thin, the optically thick core of MWC 480 is resolved at 1.4 mm with a radius of about 35 AU, constraining the dust temperature. In MWC 480, the dust emission is coming from a colder layer than the CO emission, most likely the disk mid-plane. These observations provide direct evidence of an inner cavity around LkCa 15. Such a cavity most probably results from the tidal disturbance created by a low mass companion or large planet at about 30 AU from the star. These results suggest that planetary system formation is already at work in LkCa 15. They also indicate that the classical steady-state viscous disk model is a too simplistic description of the inner 50 AU of ''proto-planetary'' disks, and that the disk evolution is coupled to the planet formation process. The MWC 480 results indicate that a proper estimate of the dust temperature and size of the optically thick core are essential to determine the dust emissivity index.
Non-Hermitian Quantum Mechanics of Non-diagonalizable Hamiltonians: puzzles with self-orthogonal states
Creators: name: Sokolov, A. V.
name: Andrianov, A. A.
name: Cannata, F.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Quantum Physics (quant-ph)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: High Energy Physics - Theory (hep-th)
subject: Mathematical Physics (math-ph)
subject: Atomic Physics (physics.atom-ph)
subject: Chemical Physics (physics.chem-ph)
subject: FOS: Physical sciences

description: We consider QM with non-Hermitian quasi-diagonalizable Hamiltonians, i.e. the Hamiltonians having a number of Jordan cells in particular biorthogonal bases. The "self-orthogonality" phenomenon is clarified in terms of a correct spectral decomposition and it is shown that "self-orthogonal" states never jeopardize resolution of identity and thereby quantum averages of observables. The example of a complex potential leading to one Jordan cell in the Hamiltonian is constructed and its origin from level coalescence is elucidated. Some puzzles with zero-binorm bound states in continuous spectrum are unraveled with the help of a correct resolution of identity.
description: 25 pages, one subsection and an appendix added, terminology is refined, important refs.added
Untitled Item
Creators: name: Datta, Meenal
Publisher: name: University of Notre Dame
Year: 2024

description: Understanding cancer cell mechanics allows for the identification of novel disease mechanisms, diagnostic biomarkers, and targeted therapies. In this study, we utilized our previously established fluid shear stress assay to investigate and compare the viscoelastic properties of normal immortalized human astrocytes (IHAs) and invasive human glioblastoma (GBM) cells when subjected to physiological levels of shear stress that are present in the brain microenvironment. We used a parallel-flow microfluidic shear system and a camera-coupled optical microscope to expose single cells to fluid shear stress and monitor the resulting deformation in real-time, respectively. From the video-rate imaging, we fed cell deformation information from digital image correlation into a three-parameter generalized Maxwell model to quantify the nuclear and cytoplasmic viscoelastic properties of single cells. We further quantified actin cytoskeleton density and alignment in IHAs and GBM cells via immunofluorescence microscopy and image analysis techniques. Results from our study show that contrary to the behavior of many extracranial cells, normal and cancerous brain cells do not exhibit significant differences in their viscoelastic behavior. Moreover, we also found that the viscoelastic properties of the nucleus and cytoplasm as well as the actin cytoskeletal densities of both brain cell types are similar. Our work suggests that malignant GBM cells exhibit unique mechanical behaviors not seen in other cancer cell types. These results warrant future study to elucidate the distinct biophysical characteristics of the brain and reveal novel mechanical attributes of GBM and other primary brain tumors.
A Two-Zone Model for Type I X-ray Bursts on Accreting Neutron Stars
Creators: name: Cooper, Randall L.
name: Narayan, Ramesh
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We construct a two-zone model to describe H and He burning on the surface of an accreting neutron star and use it to study the triggering of type I X-ray bursts. Although highly simplified, the model reproduces all of the bursting regimes seen in the more complete global linear stability analysis of Narayan & Heyl (2003), including the regime of delayed mixed bursts. The results are also consistent with observations of type I X-ray bursts. At accretion rates Mdot < 0.1 Mdot_Edd, thermonuclear He burning via the well-known thin-shell thermal instability triggers bursts. As Mdot increases, however, the trigger mechanism evolves from the fast thermal instability to a slowly growing overstability involving both H and He burning. The competition between nuclear heating via the beta-limited CNO cycle and the triple-alpha process on the one hand, and radiative cooling via photon diffusion and emission on the other hand, drives oscillations with a period approximately equal to the H-burning timescale. If these oscillations grow, the gradually rising temperature at the base of the helium layer eventually provokes a thin-shell thermal instability and hence a delayed mixed burst. For Mdot > 0.25 Mdot_Edd, there is no instability or overstability, and there are no bursts. Nearly all other theoretical models predict that bursts should occur for all Mdot < Mdot_Edd, in conflict with both our results and observations. We suggest that this discrepancy arises from the assumed strength of the hot CNO cycle breakout reaction 15O(alpha,gamma)19Ne in these other models. That observations agree much better with the results of Narayan & Heyl and our two-zone model, both of which neglect breakout reactions, may imply that the true 15O(alpha,gamma)19Ne cross section is much smaller than assumed in previous investigations.
description: 13 pages, 8 figures, accepted by ApJ
Synchronously controlled optical modes in the transmittance and reflectance spectra of multilayer photonic structure with dual-frequency nematic liquid crystal
Creators: name: Gunyakov, Vladimir A.
name: Sutormin, Vitaly S.
name: Myslivets, Sergey A.
name: Shabanov, Vasily F.
name: Zyryanov, Victor Ya.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Optics (physics.optics)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: A method for the electrically controlled synchronous mode tuning in the transmittance and reflectance spectra of a photonic structure consisting of an asymmetric dielectric Fabry-Perot microcavity and an ultrathin metallic film has been proposed. The excitation of a broadband Tamm plasmon-polariton at the metal-Bragg mirror interface is accompanied by the two phenomena opposing one another. Due to the strong absorption induced by the metal, a sufficient rejection level in reflection of the off-resonant radiation has been obtained in a wide spectral range, which almost coincides with the photonic band gap, while at the cavity mode frequencies the structure becomes transparent for the reflected radiation. This leads to the appearance of a series of narrow resonance peaks in the reflectance spectra that coincide in frequency with the transmittance peaks. Based on the structural transformations in the dual-frequency nematic liquid crystal used as a photonic structure defect, the tuning of the modes corresponding to the extraordinary waves to both the short- and long-wavelength spectral ranges has been implemented.
description: 7 pages, 7 figures
Engineering photonic environments for two-dimensional materials
Creators: name: Ma, Xuezhi
name: Youngblood, Nathan
name: Liu, Xiaoze
name: Cheng, Yan
name: Cunha, Preston
name: Kudtarkar, Kaushik
name: Wang, Xiaomu
name: Lan, Shoufeng
Publisher: name: arXiv
Year: 2020
Subjects: subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: A fascinating photonic platform with a small device scale, fast operating speed, as well as low energy consumption is two-dimensional (2D) materials, thanks to their in-plane crystalline structures and out-of-plane quantum confinement. The key to further advancement in this research field is the ability to modify the optical properties of the 2D materials. The modifications typically come from the materials themselves, for example, altering their chemical compositions. This article reviews a comparably less explored but promising means, through engineering the photonic surroundings. Rather than modifying materials themselves, this means manipulates the dielectric and metallic environments, both uniform and nanostructured, that directly interact with the materials. For 2D materials that are only one or a few atoms thick, the interaction with the environment can be remarkably efficient. This review summarizes the three degrees of freedom of this interaction: weak coupling, strong coupling, and multi-functionality. Also, it reviews a relatively timing concept of engineering that directly applied to the 2D materials by patterning. Benefiting from the burgeoning development of nanophotonics, the engineering of photonic environments provides a versatile and creative methodology of reshaping light-matter interaction in 2D materials.
description: 47 pages, 7 figures
title: Interventions infirmières favorisant l'adhérence aux traitements pharmacologiques et aux recommandations non pharmacologiques chez l'adolescent transplanté
title: Interventions infirmières favorisant l'adhérence aux traitements pharmacologiques et aux recommandations non pharmacologiques chez l'adolescent transplanté
titleType: AlternativeTitle
Creators: name: Kneuss, Gaëlle
name: Vonlanthen, Amanda
Publisher: name: Unknown
Year: 0
Subjects: subject: adhérence
subject: adolescence
subject: adolescent
subject: compliance
subject: interventions infirmières
subject: post transplantation
subject: transplantation
subject: stratégies
subject: hesav TB SI

description: Problématique : Bien que les causes de non-adhérence soient bien connues de la littérature, les adolescents transplantés ont de nombreuses difficultés à maintenir une adhérence à leurs traitements. Les conséquences de cette non adhérence sont une augmentation de la morbidité et de la mortalité. Objectif : L’objectif de ce travail est d’identifier des interventions infirmières permettant d’améliorer l’adhérence aux traitements médicamenteux et aux recommandations non pharmacologiques des adolescents transplantés. Méthode : Les bases de données CINAHL, PubMed et CAIRN ont été consultées. Plusieurs équations de recherche ont été posées. Les différents critères d’inclusion ont porté principalement sur l’âge des participants (10-18 ans), la période suivant la transplantation et l’adhérence. Neuf articles ont été sélectionnés pour répondre à la question de recherche. Ceux-ci ont été analysés au moyen de la grille de Fortin et Gagnon (2016) puis les résultats ont été mis en évidence à l’aide de grille d’extraction. Résultats : La synthèse des résultats a permis de mettre en évidence cinq types d’interventions permettant d’améliorer l’adhérence des adolescents transplantés. Il s’agit de stratégies : individuelles – technologiques – éducationnelles – pour la famille et les amis ainsi que pour les professionnels de la santé. Discussion : Ce travail a permis de souligner que les adolescents doivent accepter l’expérience de la transplantation afin de pouvoir être adhérents aux traitements. L’acceptation de l’état de santé par les jeunes mais également par leurs parents permet par la suite la prise de responsabilité. Pour finir, diverses recommandations portant sur l’utilisation de ces stratégies dans la pratique ont été faites.
Multibeam Electron Diffraction
Creators: name: Hong, Xuhao
name: Zeltmann, Steven E
name: Savitzky, Benjamin H
name: DaCosta, Luis Rangel
name: Mueller, Alexander
name: Minor, Andrew M
name: Bustillo, Karen
name: Ophus, Colin
Publisher: name: arXiv
Year: 2020
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Instrumentation and Detectors (physics.ins-det)
subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: One of the primary uses for transmission electron microscopy (TEM) is to measure diffraction pattern images in order to determine a crystal structure and orientation. In nanobeam electron diffraction (NBED) we scan a moderately converged electron probe over the sample to acquire thousands or even millions of sequential diffraction images, a technique that is especially appropriate for polycrystalline samples. However, due to the large Ewald sphere of TEM, excitation of Bragg peaks can be extremely sensitive to sample tilt, varying strongly for even a few degrees of sample tilt for crystalline samples. In this paper, we present multibeam electron diffraction (MBED), where multiple probe forming apertures are used to create mutiple STEM probes, all of which interact with the sample simultaneously. We detail designs for MBED experiments, and a method for using a focused ion beam (FIB) to produce MBED apertures. We show the efficacy of the MBED technique for crystalline orientation mapping using both simulations and proof-of-principle experiments. We also show how the angular information in MBED can be used to perform 3D tomographic reconstruction of samples without needing to tilt or scan the sample multiple times. Finally, we also discuss future opportunities for the MBED method.
description: 14 pages, 6 figures
Quantum Anomalous Hall Effect in Hg$_{1-y}$Mn$_{y}$Te Quantum Wells
Creators: name: Liu, Chao-Xing
name: Qi, Xiao-Liang
name: Dai, Xi
name: Fang, Zhong
name: Zhang, Shou-Cheng
Publisher: name: arXiv
Year: 2008
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: The quantum Hall effect is usually observed when the two-dimensional electron gas is subjected to an external magnetic field, so that their quantum states form Landau levels. In this work we predict that a new phenomenon, the quantum anomalous Hall effect, can be realized in Hg$_{1-y}$Mn$_{y}$Te quantum wells, without the external magnetic field and the associated Landau levels. This effect arises purely from the spin polarization of the $Mn$ atoms, and the quantized Hall conductance is predicted for a range of quantum well thickness and the concentration of the $Mn$ atoms. This effect enables dissipationless charge current in spintronics devices.
description: 5 pages, 3 figures. For high resolution figures see final published version when available
Emerging Jets Displaced into the Future
Creators: name: Archer-Smith, Paul
name: Linthorne, Dylan
name: Stolarski, Daniel
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: We examine the potential of future long-lived particle experiments to probe dark QCD models that feature Emerging Jets. The core of this analysis focuses on the transverse detectors AL3X, ANUBIS, CODEX-b, and MATHUSLA as they cover the most relevant parameter space, though the highly forward experiments MAPP, FORMOSA, and FASER are also explored. Geometric coverage of the detectors is calculated and used to determine the number of signal events and kinematic distribution measured for a collection of different benchmark models. This is used to map out the discovery potential of the Emerging Jets parameter space. Although all experiments demonstrate some reach, AL3X, ANUBIS, and MATHUSLA stand out as the most promising for exploring the dark QCD Emerging Jets parameter space.
description: 11 pages, 7 figures, Public repository: http://github.com/DLinthorne/LLP-Experiments
"Umstrittene Katholizität: von der zwiespältigen Beziehung von Vielfalt und Einheit"
Creators: name: Henkel, Christian
Publisher: name: Ökumenische Rundschau
Year: 2025

description: Ökumenische Rundschau, Bd. 64 Nr. 2 (2015): Ökumenische Rundschau, Band 64, Heft 2
When in Doubt, Ask: Generating Answerable and Unanswerable Questions, Unsupervised
Creators: name: Nikolenko, Liubov
name: Kalehbasti, Pouya Rezazadeh
Publisher: name: arXiv
Year: 2020
Subjects: subject: Computation and Language (cs.CL)
subject: Formal Languages and Automata Theory (cs.FL)
subject: Machine Learning (cs.LG)
subject: FOS: Computer and information sciences
subject: G.3; F.4

description: Question Answering (QA) is key for making possible a robust communication between human and machine. Modern language models used for QA have surpassed the human-performance in several essential tasks; however, these models require large amounts of human-generated training data which are costly and time-consuming to create. This paper studies augmenting human-made datasets with synthetic data as a way of surmounting this problem. A state-of-the-art model based on deep transformers is used to inspect the impact of using synthetic answerable and unanswerable questions to complement a well-known human-made dataset. The results indicate a tangible improvement in the performance of the language model (measured in terms of F1 and EM scores) trained on the mixed dataset. Specifically, unanswerable question-answers prove more effective in boosting the model: the F1 score gain from adding to the original dataset the answerable, unanswerable, and combined question-answers were 1.3%, 5.0%, and 6.7%, respectively. [Link to the Github repository: https://github.com/lnikolenko/EQA]
Orbital Clustering Identifies the Origins of Galactic Stellar Streams
Creators: name: Bonaca, Ana
name: Naidu, Rohan P.
name: Conroy, Charlie
name: Caldwell, Nelson
name: Cargile, Phillip A.
name: Han, Jiwon Jesse
name: Johnson, Benjamin D.
name: Kruijssen, J. M. Diederik
name: Myeong, G. C.
name: Speagle, Josh
name: Ting, Yuan-Sen
name: Zaritsky, Dennis
Publisher: name: arXiv
Year: 2020
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: The origins of most stellar streams in the Milky Way are unknown. With improved proper motions provided by Gaia EDR3, we show that the orbits of 23 Galactic stellar streams are highly clustered in orbital phase space. Based on their energies and angular momenta, most streams in our sample can plausibly be associated with a specific (disrupted) dwarf galaxy host that brought them into the Milky Way. For eight streams we also identify likely globular cluster progenitors (four of these associations are reported here for the first time). Some of these stream progenitors are surprisingly far apart, displaced from their tidal debris by a few to tens of degrees. We identify stellar streams that appear spatially distinct, but whose similar orbits indicate they likely originate from the same progenitor. If confirmed as physical discontinuities, they will provide strong constraints on the mass-loss from the progenitor. The nearly universal ex-situ origin of existing stellar streams makes them valuable tracers of galaxy mergers and dynamical friction within the Galactic halo. Their phase-space clustering can be leveraged to construct a precise global map of dark matter in the Milky Way, while their internal structure may hold clues to the small-scale structure of dark matter in their original host galaxies.
description: submitted to AAS Journals
Graviton mediated photon-photon scattering in general relativity
Creators: name: Brodin, G.
name: Eriksson, D.
name: Marklund, M.
Publisher: name: arXiv
Year: 2006
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: In this paper we consider photon-photon scattering due to self-induced gravitational perturbations on a Minkowski background. We focus on four-wave interaction between plane waves with weakly space and time dependent amplitudes, since interaction involving a fewer number of waves is excluded by energy-momentum conservation. The Einstein-Maxwell system is solved perturbatively to third order in the field amplitudes and the coupling coefficients are found for arbitrary polarizations in the center of mass system. Comparisons with calculations based on quantum field theoretical methods are made, and the small discrepances are explained.
description: 5 pages, 3 figures
Structure of the upper mantle below soouth-central Saskatchewan from teleseismic travel-time inversion
Creators: name: Bank, Carl-Georg
Publisher: name: University of British Columbia
Year: 2009

description: An array of three-component seismographs was deployed over the central Trans-Hudson Orogen from October 1994 to July 1996 with the objective of characterizing subcrustal lithospheric structure below an area with diamondiferous kimberlite occurance. The twodimensional array consisted of nine broad-band and eight short-period stations at approximately 100 km spacing. Most stations were situated on the Phanerozoic cover of southern Saskatchewan and located above the Glennie domain and adjacent domains as inferred from aeromagnetic anomalies. Additional data came from a feasibility test conducted in the fall of 1991 and from one permanent station run by the Incorporated Research Institutions for Seismology (IRIS). Relative travel-time residuals for 331 teleseismic events were obtained and inverted for slowness variations using a tomography code by VanDecar (1991). The ray coverage allows for depth resolution from 60 km to 400 km below the array. Our results show heterogeneities in mantle slowness above 220 to 270 km that deviate by ±2% from the iasp91 radial Earth model. The maximum slowness anomaly is a quasi-cylindrical vertical body of 120 km diameter having its maximum at (52.8°N, 105.9°W, 100km depth) and extending from 60 km depth to 220 km depth. The minimum slowness anomaly is kidney shaped and has its peak value at (51.8°N, 103.9°W, 170km depth). Cretaceous diamondiferous kimberlites and high concentrations of kimberlitic minerals in glacial tills occur above or near the rims of the low velocity anomalies. These are interpreted as remnants of a mantle plume conduit or Rayleigh-Taylor-like instability in the uppermost mantle. The correlation of the fast anomaly with a long-wavelength gravity low suggests a lithospheric keel, consistent with the presence of the proposed Saskatchewan craton. In the south, a correlation between low mantle velocities and high heat flow corroborates the interpretation of the low velocity anomalies as being primarily thermal in origin. Low levels of heterogeneity below 220 to 270 km depth are interpreted as being representative of the convecting asthenosphere. Our preferred interpretation of the imaged anomalies is the thermomechanical erosion of the lithospheric keel of the Saskatchewan craton during the Cretaceous. Diamondiferous kimberlites are a direct consequence of this process. Material from deeper levels of the mantle now trapped in the lithosphere explains the low velocity anomalies, whereas the remnants of the lithospheric keel give rise to high velocity anomalies. Our analyses indicate a lithospheric thickness of 220 to about 270 km below the Trans-Hudson Orogen.
Higher-Derivative Corrected Black Holes: Perturbative Stability and Absorption Cross-Section in Heterotic String Theory
Creators: name: Moura, Filipe
name: Schiappa, Ricardo
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Astrophysics (astro-ph)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: This work addresses spherically symmetric, static black holes in higher-derivative stringy gravity. We focus on the curvature-squared correction to the Einstein-Hilbert action, present in both heterotic and bosonic string theory. The string theory low-energy effective action necessarily describes both a graviton and a dilaton, and we concentrate on the Callan-Myers-Perry solution in d-dimensions, describing stringy corrections to the Schwarzschild geometry. We develop the perturbation theory for the higher-derivative corrected action, along the guidelines of the Ishibashi-Kodama framework, focusing on tensor type gravitational perturbations. The potential obtained allows us to address the perturbative stability of the black hole solution, where we prove stability in any dimension. The equation describing gravitational perturbations to the Callan-Myers-Perry geometry also allows for a study of greybody factors and quasinormal frequencies. We address gravitational scattering at low frequencies, computing corrections arising from the curvature-squared term in the stringy action. We find that the absorption cross-section receives α' corrections, even though it is still proportional to the area of the black hole event-horizon. We also suggest an expression for the absorption cross-section which could be valid to all orders in α'.
description: JHEP3.cls, 29 pages; v2: added refs, minor corrections and additions; v3: added more refs, more minor corrections and additions
title: Long-term effects of extreme events on nutrient intake: evidence from The Great Famine in China
Creators: name: Plavšić, Milorad
Publisher: name: University of Reading
Year: 2023

description: Famines claimed more than 70 million lives in the 20th century (Devereux, 2000). While many 
efforts were made in the past several decades to prevent future famines and other forms of food 
shortages, global trends, such as pandemics, more frequent extreme weather patterns, and armed 
conflicts suggest that famines are not a matter of the past but will remain a looming risk in the 
future. 
Short-term and long-term effects of famines have been extensively studied. One of those short-term effects is the excess mortality rate caused by famine, and it includes those who died due to 
starvation and those who were not born due to famine and who would have been born in the 
absence of famine. Long-term effects of a famine covered by the literature include economic and 
health effects. Among the economic effects are lost productivity due to lost schooling and reduced 
cognitive abilities, while the health literature documents long-term impacts on noncommunicable 
diseases, body mass index (BMI), height, and other indicators of well-being. 
Using the Great Famine of China (1959–1961) as a quasi-natural experiment, this dissertation 
examines the effects of early-life famine on nutrient intake later in life. The Great Famine provides 
a useful natural laboratory to analyse these effects in that it was very long, with unprecedented 
severity and substantial variation across the regions of China. Regional variation in famine 
severity, combined with variations in health consequences across different birth-year cohorts, 
gender and nationality, provides a suitable setting for identifying the effects of famine on food 
choice and consumption later in life.
In this dissertation I show that memories of famine have an enduring effect on eating patterns and 
lifestyle habits. I find evidence that individuals who were more affected by early-life famine have 
significantly different eating patterns, measured by qualitative and quantitative characteristics. I 
show that the Great Famine severely affected the dietary diversity and macro-nutrient
composition of diets of survivors, in particular, those who were in early childhood during the 
famine. I also find significant differences across gender, nationality, educational attainment and
income, which suggests that some of these factors moderate the harms of famine. Furthermore, I 
find that exposure to the Great Famine negatively affected food expenditures of famine survivors.
Taken together, this study’s evidence indicates that the Great Famine had a considerable sustained 
impact on nutrient intake of the survivors more than 40 years later.
A tunneling picture of dual giant Wilson loop
Creators: name: Miwa, Akitsugu
name: Sumitomo, Yoske
name: Yoshida, Kentaroh
Publisher: name: arXiv
Year: 2008
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We further discuss a rotating dual giant Wilson loop (D3-brane) solution constructed in Lorentzian AdS by Drukker et al. The solution is shown to be composed of a dual giant Wilson loop and a dual giant graviton by minutely examining its shape. This observation suggests that the corresponding gauge-theory operator should be a k-th symmetric Wilson loop with the insertions of dual giant graviton operators. To support the correspondence, the classical action of the solution should be computed and compared with the gauge-theory result. For this purpose we first perform a Wick rotation to the Lorentzian solution by following the tunneling prescription and obtain Euclidean solutions corresponding to a circular or a straight-line Wilson loop. In Euclidean signature boundary terms can be properly considered in the standard manner and the classical action for the Euclidean solutions can be evaluated. The result indeed reproduces the expectation value of the k-th symmetric Wilson loop as well as the power-law behavior of the correlation function of dual giant graviton operators.
description: 34 pages, 19 figures, v2: references added
Double Hairpin Diagrams and the Planar Equivalence of N=1 Supersymmetric Yang-Mills Theory and One-Flavor QCD
Creators: name: Keith-Hynes, Patrick
name: Thacker, H. B.
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Lattice (hep-lat)
subject: FOS: Physical sciences

description: Recent work by Armoni, Shifman, and Veneziano suggests a large-N equivalence between supersymmetric Yang-Mills Theory and one-flavor QCD. One consequence of this "orientifold projection" is that scalar and pseudoscalar mesons in one-flavor QCD should have degenerate mass since they lie within the same Wess-Zumino supermultiplet. We use lattice calculations to investigate the mass shifts caused by "double-hairpin" annihilation diagrams in quenched QCD to test for this degeneracy. Similar quark-antiquark annihilation processes are studied in the 2-dimensional CP(N-1) model with quenched fermions.
description: 7 pages, 2 figures (2 figure files), PoS style, Lattice 2006 Poster (Beyond QCD)
title: Aufklärung und Einwilligung : Erstellung einer Lehrvideoserie zur Vermittlung von Grundkenntnissen in der Patientenaufklärung und Risikokommunikation im Rahmen der partizipativen Entscheidungsfindung
Creators: name: Dreier, Christian
Publisher: name: Universität Bern
Year: 2021
Subjects: subject: 610 Medicine & health

description: Die Dissertation beschäftigt sich mit der Thematik «Aufklärung und Einwilligung» vor medizinischen Eingriffen. Sie stellt eine Querschnittsynthese aus drei unterschiedlichen Themenbereichen dar: es werden einerseits die rechtlichen Hintergründe fundiert erörtert, das Konzept der partizipativen Entscheidungsfindung (shared decision making) untersucht und abschliessend die verständliche Vermittlung von Risiken und Wahrscheinlichkeiten an Patienten diskutiert.

Aus dieser Arbeit zu Recht, Kommunikation und Statistik resultierte die Veröffentlichung von vier Lehrfilmen mit demselben Obertitel zur Verwendung im Kommunikationstraining des medizinischen Studiengangs der Universität Bern. Die Lehrfilme wurden im Sommer 2021 auf der CliniSurf Website der medizinischen Fakultät publiziert.
Cobounding odd cycle colorings
Creators: name: Kozlov, Dmitry N.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Algebraic Topology (math.AT)
subject: Combinatorics (math.CO)
subject: FOS: Mathematics
subject: 55M35; 05C15, 57S17

description: We give a very short self-contained combinatorial proof of the Babson-Kozlov conjecture, by presenting a cochain whose coboundary is the desired power of the characteristic class.
description: 2 pages