cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
An ATR- and Chk1-Dependent S Checkpoint Inhibits Replicon Initiation following UVC-Induced DNA Damage
Creators: name: Kaufmann, W. K.
name: Simpson, D. A.
name: Paules, R. S.
name: Frank, A. R.
name: Cordeiro-Stone, M.
name: Heffernan, T. P.
name: Heinloth, A. N.
Publisher: name: The University of North Carolina at Chapel Hill University Libraries
Year: 2002

description: Inhibition of replicon initiation is a stereotypic DNA damage response mediated through S checkpoint mechanisms not yet fully understood. Studies were undertaken to elucidate the function of checkpoint proteins in the inhibition of replicon initiation following irradiation with 254 nm UV light (UVC) of diploid human fibroblasts immortalized by the ectopic expression of telomerase. Velocity sedimentation analysis of nascent DNA molecules revealed a 50% inhibition of replicon initiation when normal human fibroblasts were treated with a low dose of UVC (1 J/m2). Ataxia telangiectasia (AT), Nijmegen breakage syndrome (NBS), and AT-like disorder fibroblasts, which lack an S checkpoint response when exposed to ionizing radiation, responded normally when exposed to UVC and inhibited replicon initiation. Pretreatment of normal and AT fibroblasts with caffeine or UCN-01, inhibitors of ATR (AT mutated and Rad3 related) and Chk1, respectively, abolished the S checkpoint response to UVC. Moreover, overexpression of kinase-inactive ATR in U2OS cells severely attenuated UVC-induced Chk1 phosphorylation and reversed the UVC-induced inhibition of replicon initiation, as did overexpression of kinase-inactive Chk1. Taken together, these data suggest that the UVC-induced S checkpoint response of inhibition of replicon initiation is mediated by ATR signaling through Chk-1 and is independent of ATM, Nbs1, and Mre11.
Structural bias in population-based algorithms
Creators: name: Kononova, Anna V.
name: Corne, David W.
name: De Wilde, Philippe
name: Shneer, Vsevolod
name: Caraffini, Fabio
Publisher: name: arXiv
Year: 2014
Subjects: subject: Neural and Evolutionary Computing (cs.NE)
subject: FOS: Computer and information sciences

description: Challenging optimisation problems are abundant in all areas of science. Since the 1950s, scientists have developed ever-diversifying families of black box optimisation algorithms designed to address any optimisation problem, requiring only that quality of a candidate solution is calculated via a fitness function specific to the problem. For such algorithms to be successful, at least three properties are required: an effective informed sampling strategy, that guides generation of new candidates on the basis of fitnesses and locations of previously visited candidates; mechanisms to ensure efficiency, so that same candidates are not repeatedly visited; absence of structural bias, which, if present, would predispose the algorithm towards limiting its search to some regions of solution space. The first two of these properties have been extensively investigated, however the third is little understood. In this article we provide theoretical and empirical analyses that contribute to the understanding of structural bias. We prove a theorem concerning dynamics of population variance in the case of real-valued search spaces. This reveals how structural bias can manifest as non-uniform clustering of population over time. Theory predicts that structural bias is exacerbated with increasing population size and problem difficulty. These predictions reveal two previously unrecognised aspects of structural bias. Respectively, increasing population size, though ostensibly promoting diversity, will magnify any inherent structural bias, and effects of structural bias are more apparent when faced with difficult problems. Our theoretical result also suggests that two commonly used approaches to enhancing exploration, increasing population size and increasing disruptiveness of search operators, have quite distinct implications in terms of structural bias.
(:unas) unassigned
Creators: name: (:Unkn) Unknown
Publisher: name: Universita' degli Studi di Salerno
Year: 2024

description: Impressioni personali degli anni universitari e riflessioni critiche attuali si intrecciano in questa rilettura della raccolta di alcuni saggi di Auerbach curata da Della Terza. Non solo si discutono ragioni e metodi della scelta, ma si confronta anche l’ermeneutica di Auerbach con le esegesi dei maggiori studiosi di Dante e della civiltà medievale, da Curtius a Gilson, da Spitzer a Singleton.
description: Personal impressions of his university years and current critical reflections are intertwined in this reinterpretation of the collection of some essays by Auerbach edited by Della Terza. Not only are the reasons and methods of the choice discussed, but Auerbach's hermeneutics is also compared with the exegeses of the major scholars of Dante and medieval civilization, from Curtius to Gilson, from Spitzer to Singleton.
Association of DNA Polymerase   (pol  ) with Ku and Ligase IV: Role for pol   in End-Joining Double-Strand Break Repair
Creators: name: Mitchell, B. S.
name: Nick McElhinny, S. A.
name: Ramsden, D. A.
name: Mahajan, K. N.
Publisher: name: The University of North Carolina at Chapel Hill University Libraries
Year: 2002

description: Mammalian DNA polymerase μ (pol μ) is related to terminal deoxynucleotidyl transferase, but its biological role is not yet clear. We show here that after exposure of cells to ionizing radiation (IR), levels of pol μ protein increase. pol μ also forms discrete nuclear foci after IR, and these foci are largely coincident with IR-induced foci of γH2AX, a previously characterized marker of sites of DNA double-strand breaks. pol μ is thus part of the cellular response to DNA double-strand breaks. pol μ also associates in cell extracts with the nonhomologous end-joining repair factor Ku and requires both Ku and another end-joining factor, XRCC4-ligase IV, to form a stable complex on DNA in vitro. pol μ in turn facilitates both stable recruitment of XRCC4-ligase IV to Ku-bound DNA and ligase IV-dependent end joining. In contrast, the related mammalian DNA polymerase β does not form a complex with Ku and XRCC4-ligase IV and is less effective than pol μ in facilitating joining mediated by these factors. Our data thus support an important role for pol μ in the end-joining pathway for repair of double-strand breaks.
Predicted novel type of photoinduced topological phase transition accompanied by collision and collapse of Dirac-cone pair in organic salt $α$-(BEDT-TTF)$_2$I$_3$
Creators: name: Kitayama, Keisuke
name: Ogata, Masao
name: Mochizuki, Masahito
name: Tanaka, Yasuhiro
Publisher: name: arXiv
Year: 2022
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: Photoinduced topological phase transitions in the Dirac-electron systems have attracted intensive research interest since its theoretical prediction in graphene, where the application of circularly polarized light opens a gap at the Dirac points and renders the system a topologically nontrivial Chern insulator phase through breaking the time-reversal symmetry. However, most of the previously studied phenomena in two-dimensional Dirac systems are basically based on the same physicical mechanism, i.e., the gap opening in the Dirac electron bands with circularly polarized light, and it is lacking in variety of the physics. In this paper, we theoretically predict a novel type of photoinduced topological phase transition accompanied by collision and collapse of gapped Dirac points in the organic salt $α$-(BEDT-TTF)$_2$I$_3$. By constructing the Floquet theory for this compound, we demonstrate that the irradiation of elliptically polarized light causes collision of the Dirac points through the photoinduced band deformation and their collapse, which eventually results in the topological phase transition from a topological semimetal with gapped Dirac cones to a normal insulator when the elliptical axis is oriented at a specfic angle with respect to the crystallographic axes. We argue that this novel photoinduced phase transition can be experimentally detected by the measurement of Hall conductivity. The present work enriches the fundamental physics of photoinduced topological phase transitions and thus contribute to development of this rapidly growing research field.
Alternative au suivi traditionnel pour les adolescents atteints d'un trouble psychiatrique
Creators: name: Gonçalves, Mariana
name: Pinilla, Aïtana
Publisher: name: Unknown
Year: 0
Subjects: subject: adolescent
subject: santé mentale
subject: psychiatrie
subject: accompagnement
subject: rôle infirmier
subject: traitement

description: Le but de notre travail est d’explorer les différentes interventions des équipes mobiles de psychiatrie auprès des adolescents souffrant d’un trouble psychiatrique, à travers une revue de littérature internationale. Ceci afin de mettre en évidence le rôle des infirmiers dans ce type de traitement.
description: Mémoire de Bachelor : Haute Ecole de la Santé La Source, 2013
Nucleosynthesis in Outflows from Black Hole-Neutron Star Merger Disks With Full GR$ν$RMHD
Creators: name: Curtis, Sanjana
name: Miller, Jonah M.
name: Frohlich, Carla
name: Sprouse, Trevor
name: Lloyd-Ronning, Nicole
name: Mumpower, Matthew
Publisher: name: arXiv
Year: 2022
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: Along with binary neutron star mergers, the in-spiral and merger of a black hole and a neutron star is a predicted site of $r$-process nucleosynthesis and associated kilonovae. For the right mass ratio, very large amounts of neutron rich material may become unbound from the post-merger accretion disk. We simulate a suite of four post-merger disks with full-transport general relativistic neutrino radiation magnetohydrodynamics. We find that the outflows from these disks are very close to the threshold conditions for robust $r$-process nucleosynthesis. For these conditions, the detailed properties of the outflow determine whether a full $r$-process can or cannot occur, implying that a wide range of observable phenomena are possible. We show that on average the disk outflow lanthanide fraction is suppressed relative to the solar isotopic pattern. In combination with the dynamical ejecta, these outflows imply a kilonova with both blue and red components.
Connecting the interstellar magnetic field at the heliosphere to the Loop I superbubble
Creators: name: Frisch, P. C.
name: Berdyugin, A.
name: Funsten, H. O.
name: Magalhaes, A. M.
name: McComas, D. J.
name: Piirola, V.
name: Schwadron, N. A.
name: Seriacopi, D. B.
name: Wiktorowicz, S. J.
Publisher: name: arXiv
Year: 2014
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: The local interstellar magnetic field affects both the heliosphere and the surrounding cluster of interstellar clouds (CLIC). Measurements of linearly polarized starlight provide the only test of the magnetic field threading the CLIC. Polarization measurements of the CLIC magnetic field show multiple local magnetic structures, one of which is aligned with the magnetic field traced by the center of the "ribbon" of energetic neutral atoms discovered by the Interstellar Boundary Explorer (IBEX). Comparisons between the bulk motion of the CLIC through the local standard of rest, the magnetic field direction, the geometric center of Loop I, and the polarized dust bridge extending from the heliosphere toward the North Polar Spur direction all suggest that the CLIC is part of the rim region of the Loop I superbubble.
description: To be published in the proceedings of the 13th Annual International Astrophysics Conference: "Voyager, IBEX, and the Interstellar Medium"
Dynamics of topological defects after a photo-induced melting of a charge-density wave
Creators: name: Tarkhov, Andrei E.
name: Rozhkov, A. V.
name: Zong, Alfred
name: Kogar, Anshul
name: Gedik, Nuh
name: Fine, Boris V.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Quantum Gases (cond-mat.quant-gas)
subject: Superconductivity (cond-mat.supr-con)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Charge-density-wave order in a solid can be temporarily "melted" by a strong laser pulse. Here we use the discrete Gross-Pitaevskii equation on a cubic lattice to simulate the recovery of the CDW long-range phase coherence following such a pulse. Our simulations indicate that the recovery process is dramatically slowed down by the three-dimensional topological defects - CDW dislocations - created as a result of strongly nonequilibrium heating and cooling of the system. Overall, the simulated CDW recovery was found to be remarkably reminiscent of a recent pump-probe experiment in LaTe$_3$.
description: v2. Main text: 5 pages, 4 figures. Supplemental Material: 7 pages, 8 figures
Bni5p, a Septin-Interacting Protein, Is Required for Normal Septin Function and Cytokinesis in Saccharomyces cerevisiae
Creators: name: Pringle, J. R.
name: Lippincott, J.
name: Li, R.
name: Song, S.
name: Longtine, M. S.
name: Ro, H.-S.
name: Lee, K. S.
name: Lee, P. R.
name: Park, C. J.
name: De Virgilio, C.
Publisher: name: The University of North Carolina at Chapel Hill University Libraries
Year: 2002

description: In the budding yeast Saccharomyces cerevisiae, the Cdc3p, Cdc10p, Cdc11p, Cdc12p, and Sep7p/Shs1p septins assemble early in the cell cycle in a ring that marks the future cytokinetic site. The septins appear to be major structural components of a set of filaments at the mother-bud neck and function as a scaffold for recruiting proteins involved in cytokinesis and other processes. We isolated a novel gene, BNI5, as a dosage suppressor of the cdc12-6 growth defect. Overexpression of BNI5 also suppressed the growth defects of cdc10-1, cdc11-6, and sep7Δ strains. Loss of BNI5 resulted in a cytokinesis defect, as evidenced by the formation of connected cells with shared cytoplasms, and deletion of BNI5 in a cdc3-6, cdc10-1, cdc11-6, cdc12-6, or sep7Δ mutant strain resulted in enhanced defects in septin localization and cytokinesis. Bni5p localizes to the mother-bud neck in a septin-dependent manner shortly after bud emergence and disappears from the neck approximately 2 to 3 min before spindle disassembly. Two-hybrid, in vitro binding, and protein-localization studies suggest that Bni5p interacts with the N-terminal domain of Cdc11p, which also appears to be sufficient for the localization of Cdc11p, its interaction with other septins, and other critical aspects of its function. Our data suggest that the Bni5p-septin interaction is important for septin ring stability and function, which is in turn critical for normal cytokinesis.
Isospin transfer modes in exotic nuclei
Creators: name: Litvinova, Elena
Publisher: name: arXiv
Year: 2014
Subjects: subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: This work presents an approach to nuclear spin-isospin response, which is capable of describing the overall strength distribution up to high excitation energies, including the fine structure of the low-lying strength, and resolving the long-standing quenching problem. The model is a covariant realization of the nuclear field theory and based on the self-consistent extensions of the covariant energy density functional (CEDF) theory. Results of the recent calculations for spin-isospin response of ordinary and exotic medium-mass nuclei are presented and discussed.
description: Invited talk at the 15-th International Symposium on Capture Gamma-Ray Spectroscopy and Related Topics (CGS15), to appear in EPJ Web of Conferences
New Rotifera (Aschelminthes) from Tasmania
Creators: name: Koste, Walter
name: Shiel, Russel J
Publisher: name: La Trobe
Year: 2023

description: Murray-Darling Freshwater Research Centre

MDFRC item.

One hundred Tasmanian aquatic habitats were surveyed for Rotifera in Spring 1985. Of 130 species identified, 63 were first records for Tasmania, 17 new to Australian anf four (Brachionus lyratus tasmaniensis ssp. nov., Lepadella tana sp. nov., Cephalodella lindamaya sp. nov., and Testudinella mucronata tasmaniensis ssp. nov.) new to science, bringing to approximately 200 the rotifers known from the island. New taxa are described and figured; several of the first records for Australia also are figured, and ecological and zoogeographical pecularities of the Tasmanian Rotifera are discussed.
Cellular N-Ras Promotes Cell Survival by Downregulation of Jun N-Terminal Protein Kinase and p38
Creators: name: Der, C. J.
name: Palmby, T.
name: Wolfman, A.
name: Wolfman, J. C.
Publisher: name: The University of North Carolina at Chapel Hill University Libraries
Year: 2002

description: Cellular N-Ras provides a steady-state antiapoptotic signal, at least partially through the regulation of phosphorylated Akt and Bad levels. Fibroblasts lacking c-N-Ras expression are highly sensitive to the induction of apoptosis by a variety of agents. Reduction of pBad and pAkt levels using a phosphatidylinositol 3-kinase inhibitor was not sufficient to sensitize the control cell population to the high level of apoptosis observed in the N-Ras knockout cell lines, suggesting that c-N-Ras provides at least one other antiapoptotic signal. Stimulation of the control cells with apoptotic agents results in a transient increase in Jun N-terminal protein kinase (JNK)/p38 activity that decreased to baseline levels during the time course of the experiments. In all cases, however, sustained JNK/p38 activity was observed in cells lacking c-N-Ras expression. This correlated with sustained levels of phosphorylated MKK4 and MKK3/6, upstream activators of JNK and p38, respectively. Mimicking the sustained activation of JNK in the control cells did result in increasing their sensitivity to apoptotic agents, suggesting that prolonged JNK activity is a proapoptotic event. We also examined the potential downstream c-N-Ras targets that might be involved in regulating the duration of the JNK/p38 signal. Only the RalGDS 37G-N-Ras protein protected the N-Ras knockout cells from apoptosis and restored transient rather than sustained JNK activation. These data suggest that cellular N-Ras provides an antiapoptotic signal through at least two distinct mechanisms, one which regulates steady-state pBad and pAkt levels and one which regulates the duration of JNK/p38 activity following an apoptotic challenge.
Chaperone Proteins Abrogate Inhibition of the Human Papillomavirus (HPV) E1 Replicative Helicase by the HPV E2 Protein
Creators: name: Makhov, A. M.
name: Broker, T. R.
name: Lin, B. Y.
name: Griffith, J. D.
name: Chow, L. T.
Publisher: name: The University of North Carolina at Chapel Hill University Libraries
Year: 2002

description: Human papillomavirus (HPV) DNA replication requires the viral origin recognition protein E2 and the presumptive viral replicative helicase E1. We now report for the first time efficient DNA unwinding by a purified HPV E1 protein. Unwinding depends on a supercoiled DNA substrate, topoisomerase I, single-stranded-DNA-binding protein, and ATP, but not an origin. Electron microscopy revealed completely unwound molecules. Intermediates contained two single-stranded loops emanating from a single protein complex, suggesting a bidirectional E1 helicase which translocated the flanking DNA in an inward direction. We showed that E2 protein partially inhibited DNA unwinding and that Hsp70 or Hsp40, which we reported previously to stimulate HPV-11 E1 binding to the origin and promote dihexameric E1 formation, apparently displaced E2 and abolished inhibition. Neither E2 nor chaperone proteins were detected in unwinding complexes. These results suggest that chaperones play important roles in the assembly and activation of a replicative helicase in higher eukaryotes. An E1 mutation in the ATP binding site caused deficient binding and unwinding of origin DNA, indicating the importance of ATP binding in efficient helicase assembly on the origin.
Symplectic Reduction of Classical Mechanics on Shape Space
Creators: name: Tokasi, Sahand
name: Pickl, Peter
Publisher: name: arXiv
Year: 2022
Subjects: subject: History and Philosophy of Physics (physics.hist-ph)
subject: Mathematical Physics (math-ph)
subject: Classical Physics (physics.class-ph)
subject: FOS: Physical sciences

description: One of the foremost goals of research in physics is to find the most basic and universal theories that describe our universe. Many theories assume the presence of an absolute space and time in which the physical objects are located and physical processes take place. However, it is more fundamental to understand time as relative to the motion of another object, e.g. the number of swings of a pendulum, and the position of an object primarily as relative to other objects. The goals of this paper is to explain, how using the principle of relationalism (to be introduced below), classical mechanics can be formulated on a most elementary space, which is freed from absolute entities: shape space. On shape space only the relative orientation and length of subsystems are taken into account. In order to find out how the shape of a classical system evolves in time, the method of "symplectic reduction of Hamiltonian systems" is extended to include scale transformations, and in this way the reduction of a classical system with respect to the full similarity group is achieved. A necessary requirement for the validity of the principle of relationalism is that changing the length scale of a system, all parameters of the theory that depend on the length, get changed accordingly. In particular, the principle of relationalism requires a proper transformation of the coupling constants of the interaction potentials in Classical Physics. This leads consequently to a transformation in Planck's measuring units, which enables us to derive a metric on shape space in a unique way. Later in this paper, we will explain the derivation of the reduced Hamiltonian and symplectic form on shape space.
A comparison of two quantum distances
Creators: name: Kaad, Jens
name: Kyed, David
Publisher: name: arXiv
Year: 2022
Subjects: subject: Functional Analysis (math.FA)
subject: Operator Algebras (math.OA)
subject: FOS: Mathematics
subject: 58B34, 46L89, 46L30

description: We show that Rieffel's quantum Gromov-Hausdorff distance between two compact quantum metric spaces is not equivalent to the ordinary Gromov-Hausdorff distance applied to the associated state spaces.
description: v2: a few typos fixed. To appear in Mathematical Physics, Analysis and Geometry
Characterization of Mice Deficient in the Src Family Nonreceptor Tyrosine Kinase Frk/rak
Creators: name: Qiu, T. H.
name: Chandrasekharan, S.
name: Alkharouf, N.
name: Liu, E. T.
name: Brantley, K.
name: Mitchell, J. B.
Publisher: name: The University of North Carolina at Chapel Hill University Libraries
Year: 2002

description: Frk/rak belongs to a novel family of Src kinases with epithelial tissue-specific expression. Although developmental expression patterns and functional overexpression in vitro have associated these kinases with growth suppression and differentiation, their physiological functions remain largely unknown. We therefore generated mice carrying a null mutation in iyk, the mouse homolog of Frk/rak. We report here that frk/rak−/− mice are viable, show similar growth rates to wild-type animals, and are fertile. Furthermore, a 2-year study of health and survival did not identify differences in the incidence and spectrum of spontaneous tumors or provide evidence of hyperplasias in frk/rak−/− epithelial tissues. Histological analysis of organs failed to reveal any morphological changes in epithelial tissues that normally express high levels of Frk/rak. Ultrastructural analysis of intestinal enterocytes did not identify defects in brush border morphology or structural polarization, demonstrating that Frk/rak is dispensable for intestinal cytodifferentiation. Additionally, frk/rak-null mice do not display altered sensitivity to intestinal damage induced by ionizing radiation. cDNA microarray analysis revealed an increase in c-src expression and identified subtle changes in the expression of genes regulated by thyroid hormones. Significant decreases in the circulating levels of T3 but not T4 hormone are consistent with this observation and reminiscent of euthyroid sick syndrome, a stress-associated clinical condition.
Rotifera from Australian inland waters. I. Bdelloidea (Rotifera: Digononta)
Creators: name: Koste, W
name: Shiel, R. J
Publisher: name: La Trobe
Year: 2023

description: Murray-Darling Freshwater Research Centre

MDFRC item.

In this paper, the first of a series providing a systematic revision of all Rotifera now known from Australian inland waters, the common bdelloid rotifers are reviewed. The group is epiphytic or epibenthic in habit, but some species commonly occur in open water of billabongs, lakes and rivers, particularly in association with algal blooms. Frequent occurrence of bdelloids in plankton collections necessitates diagnostic keys to their identification. For the common species only, morphological features of taxonomic significance are described and figured to facilitate further study.
Crystal nucleation mechanism in melts of short polymer chains under quiescent conditions and under shear flow
Creators: name: Anwar, Muhammad
name: Berryman, Joshua T.
name: Schilling, Tanja
Publisher: name: arXiv
Year: 2014
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: FOS: Physical sciences

description: We present a molecular dynamics simulation study of crystal nucleation from undercooled melts of n-alkanes, and we identify the molecular mechanism of homogeneous crystal nucleation under quiescent conditions and under shear flow. We compare results for n-eicosane(C20) and n-pentacontahectane(C150), i.e. one system below the entanglement length and one above. Under quiescent conditions, we observe that entanglement does not have an effect on the nucleation mechanism. For both chain lengths, the chains first align and then straighten locally. Then the local density increases and finally positional ordering sets in. At low shear rates the nucleation mechanism is the same as under quiescent conditions, while at high shear rates the chains align and straighten at the same time. We report on the effects of shear rate and temperature on the nucleation rates and estimate the critical shear rates, beyond which the nucleation rates increase with the shear rate. We show that the viscosity of the system is not affected by the crystalline nuclei.
description: 9 pages
title: Brief von Michał Kalecki an Josef Steindl
Creators: name: Kalecki, Michał
Year: 2018

description: Beilage Brief von Kazimierz Laski an Franz Nemschak vom Österreichischen Institut für Wirtschaftsforschung (WIFO).
description: Brief, Manuskript, 1 Blatt, 1 Seite sowie Beilage, Typoskript, 1 Blatt, 1 Seite und Kuvert
Time-Dependent Nuclear-Electronic Orbital Hartree-Fock Theory in a Strong Uniform Magnetic Field
Creators: name: Culpitt, Tanner
name: Peters, Laurens D. M.
name: Tellgren, Erik I.
name: Helgaker, Trygve
Publisher: name: arXiv
Year: 2022
Subjects: subject: Chemical Physics (physics.chem-ph)
subject: FOS: Physical sciences

description: The Born-Oppenheimer (BO) approximation is less accurate in the presence of a strong magnetic field than in the absence of a field. This is due to the complicated and unpredictable response of electronic structure to the field, especially in the mixed regime $B \approx B_0 = 2.35 \times 10^5\,$T. Therefore, it is desirable to explore non-BO methods in magnetic fields. In this work, the nuclear-electronic orbital (NEO) method is employed to study protonic vibrational excitation energies in the presence of a strong magnetic field. NEO Generalized Hartree-Fock theory and time-dependent Hartree-Fock theory are derived and implemented, accounting for all terms that result as a consequence of the nonperturbative treatment of molecular systems in a magnetic field. The NEO results for HCN and FHF$^-$ with clamped heavy nuclei are compared against the quadratic eigenvalue problem (QEP). Each molecule has three semi-classical modes owing to the hydrogen - two precession modes that are degenerate in the absence of a field and one stretching mode. The NEO-TDHF model is found to perform well - in particular it automatically captures the screening effects of the electrons on the nuclei, which are quantified through the difference in energy of the precession modes.
title: Syndrome du bébé secoué
title: comment les infirmières peuvent-elles le diminuer ?
titleType: Subtitle
Creators: name: Ferreira, Débora
name: Pereira Enes, Amandine
Publisher: name: Unknown
Year: 0
Subjects: subject: pédiatrie
subject: rôle infirmier
subject: prévention
subject: syndrôme du bébé secoué
subject: éducation thérapeutique
subject: accompagnement
subject: parents

description: Cette revue de littérature porte sur le thème du rôle infirmier dans la prévention du syndrome du bébé secoué. Notre problématique s’insère dans le contexte des soins aux jeunes adultes confrontés au rôle, nouveau pour eux, de parents et aux difficultés qui peuvent en découler : les pleurs inconsolables du nourrisson, la fatigue maternelle et l’épuisement parental par exemple. Nous cherchons, par cette revue de littérature, à trouver des pistes d’intervention permettant de prévenir le syndrome du bébé secoué. Nous avons confronté notre problématique à la littérature scientifique selon une méthodologie rigoureuse, ce qui nous a permis d’apporter des prémisses de réponses et des pistes d’intervention.
description: Mémoire de Bachelor : Haute Ecole de la Santé La Source, 2013
From Moyal deformations to chiral higher-spin theories and to celestial algebras
Creators: name: Monteiro, Ricardo
Publisher: name: arXiv
Year: 2022
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We study the connection of Moyal deformations of self-dual gravity and self-dual Yang-Mills theory to chiral higher-spin theories, and also to deformations of operator algebras in celestial holography. The relation to Moyal deformations illuminates various aspects of the structure of chiral higher-spin theories. For instance, the appearance of the self-dual kinematic algebra in all the theories considered here leads via the double copy to vanishing tree-level scattering amplitudes. Regarding celestial holography, the Moyal deformation of self-dual gravity was recently shown to lead to the loop algebra of $W_{\wedge}$, and we obtain here the analogous deformation of a Kac-Moody algebra corresponding to Moyal-deformed self-dual Yang-Mills theory. We also introduce the celestial algebras for various chiral higher-spin theories.
description: 30 pages, 3 figures; v2: minor changes
Formation of Dark Matter Torii Around Supermassive Black Holes Via The Eccentric Kozai-Lidov Mechanism
Creators: name: Naoz, Smadar
name: Silk, Joseph
Publisher: name: arXiv
Year: 2014
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: We explore the effects of long term secular perturbations on the distribution of dark matter particles around Supermassive Black Hole (BH) binaries. We show that in the hierarchical (in separation) three-body problem, one of the BHs and a dark matter particle form an inner binary. Gravitational perturbations from the BH companion, on a much wider orbit, can cause the dark matter particle to reach extremely high eccentricities and even get accreted onto the BH, by what is known as the Eccentric Kozai-Lidov (EKL) mechanism. We show that this may produce a torus-like configuration for the dark matter distribution around the less massive member of the BH binary. We first consider an Intermediate BH (IMBH) in the vicinity of our Galactic Center, which may be a relic of a past minor merger. We show that if the IMBH is close enough (i.e., near the stellar disk) the EKL mechanism is very efficient in exciting the eccentricity of dark matter particles in near-polar configurations to extremely high values where they are accreted by the IMBH. We show that this mechanism is even more effective if the central BH grows in mass, where we have assumed adiabatic growth. Since near-polar configurations are disrupted, a torus-like shape is formed. We also show that this behavior is also likely to be relevant for Supermassive BH binaries. We suggest that if the BHs are spinning, the accreted dark matter particles may linger in the ergosphere and thereby may generate self-annihilations and produce an indirect signature of potential interest.
description: Accepted to ApJ, 11 pages, 9 figures
Assignment of excitonic insulators in \textit{ab initio} theories: the case of NiBr$_2$
Creators: name: Di Sabatino, Stefano
name: Molina-Sánchez, Alejandro
name: Romaniello, Pina
name: Sangalli, Davide
Publisher: name: arXiv
Year: 2022
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: In this work we perform a detailed first-principles analysis of the electronic and optical properties of NiBr$_2$ within the state-of-the-art $GW$+BSE scheme to determine whether this system displays negative excitonic energies, which would identify it as an (half) excitonic insulator. Particular attention is payed to the convergence of the $GW$ band structure and to the consistency between approximations employed in the ground-state calculations and approximations employed in the linear response calculations. We show that these two issues play a crucial role in identifying the excitonic nature of NiBr$_2$.
Digital synchronization for continuous-variable quantum key distribution
Creators: name: Chin, Hou-Man
name: Jain, Nitin
name: Andersen, Ulrik L.
name: Gehring, Tobias
Publisher: name: arXiv
Year: 2022
Subjects: subject: Quantum Physics (quant-ph)
subject: Signal Processing (eess.SP)
subject: FOS: Physical sciences
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: Continuous variable quantum key distribution (CV-QKD) is a promising emerging technology for the distribution of secure keys for symmetric encryption. It can be readily implemented using commercial off-the-shelf optical telecommunications components. A key requirement of the CV-QKD receiver is the ability to measure the quantum states at the correct time instance and rate using the correct orthogonal observables, referred to as synchronization. We propose a digital synchronization procedure for a modern CV-QKD system with locally generated local oscillator for coherent reception. Our proposed method is modulation format independent allowing it to be used in a variety of CV-QKD systems. We experimentally investigate its performance with a Gaussian modulated CV-QKD system operating over a 10-20 km span of standard single mode fibre. Since the procedure does not require hardware modifications it paves the way for cost-effective QKD solutions that can adapt rapidly to changing environmental conditions.
description: 7 pages, 9 figures
A Pulsation Search Among Young Brown Dwarfs and Very Low Mass Stars
Creators: name: Cody, Ann Marie
name: Hillenbrand, Lynne A.
Publisher: name: arXiv
Year: 2014
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: In 2005, Palla & Baraffe proposed that brown dwarfs (BDs) and very low mass stars (VLMSs; <0.1 solar masses) may be unstable to radial oscillations during the pre-main-sequence deuterium burning phase. With associated periods of 1-4 hours, this potentially new class of pulsation offers unprecedented opportunities to probe the interiors and evolution of low-mass objects in the 1-15 million year age range. Following up on reports of short-period variability in young clusters, we designed a high-cadence photometric monitoring campaign to search for deuterium-burning pulsation among a sample of 348 BDs and VLMSs in the four young clusters $σ$ Orionis, Chamaeleon I, IC 348, and Upper Scorpius. In the resulting light curves we achieved sensitivity to periodic signals of amplitude several millimagnitudes, on timescales from 15 minutes to two weeks. Despite the exquisite data quality, we failed to detect any periodicities below seven hours. We conclude that D-burning pulsations are not able to grow to observable amplitudes in the early pre-main sequence. In spite of the non-detection, we did uncover a rich set of variability behavior- both periodic and aperiodic- on day to week timescales. We present new compilations of variable sources from our sample, as well as three new candidate cluster members in Chamaeleon I.
description: 21 pages, 15 figures; accepted for publication in ApJ
The Sabatier principle for Battery Anodes: Chemical Kinetics and Reversible Electrodeposition at Heterointerfaces
Creators: name: Zheng, Jingxu
name: Deng, Yue
name: Li, Wenzao
name: Yin, Jiefu
name: West, Patrick J.
name: Tang, Tian
name: Tong, Xiao
name: Bock, David C.
name: Jin, Shuo
name: Zhao, Qing
name: Garcia-Mendez, Regina
name: Takeuchi, Kenneth J.
name: Takeuchi, Esther S.
name: Marschilok, Amy C.
name: Archer, Lynden A.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Chemical Physics (physics.chem-ph)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: How surface chemistry influences reactions occurring thereupon has been a long-standing question of broad scientific and technological interest for centuries. Recently, it has re-emerged as a critical question in a subdiscipline of chemistry - electrochemistry at heterointerphases, where the answers have implications for both how, and in what forms, humanity stores the rising quantities of renewable electric power generated from solar and wind installations world-wide. Here we consider the relation between the surface chemistry at such interphases and the reversibility of electrochemical transformations at a rechargeable battery electrode. Conventional wisdom holds that stronger chemical interaction between the metal deposits and electrode promotes reversibility. We report instead that a moderate strength of chemical interaction between the deposit and the substrate, neither too weak nor too strong, enables highest reversibility and stability of the plating/stripping redox processes at a battery anode. Analogous to the empirical Sabatier principle for chemical heterogeneous catalysis, our finding arises from the confluence of competing processes - one driven by electrochemistry and the other by chemical alloying. Based on experimental evaluation of metal plating/stripping systems in battery anodes of contemporary interest, we show that such knowledge provides a powerful tool for designing key materials in highly reversible electrochemical energy storage technologies based on earth-abundant, low-cost metals.
description: accepted at Science Advances, in press
title: Fatigue chronique et qualité de vie
title: le rôle infirmier autonome auprès des personnes atteintes de sclérose en plaques
titleType: Subtitle
Creators: name: Djeumo Moutcheu, Nene
name: Guilloud, Tatiana
Publisher: name: Unknown
Year: 0
Subjects: subject: fatigue chronique
subject: qualité de vie
subject: sclérose en plaques
subject: rôle infirmier

description: Dans ce travail, il s’agit de s’intéresser à la spécificité de la fatigue chronique secondaire à la sclérose en plaques (SEP). Ce symptôme, très fréquent chez les personnes atteintes de cette maladie, a une répercussion sur leur qualité de vie. Il s’agit dès lors de relever le rôle autonome de l’infirmière auprès de cette population de patients, d’où notre question de recherche qui se formule de cette manière : Quel est le rôle autonome de l’infirmière auprès de la personne atteinte de sclérose en plaques vivant à domicile et souffrant de fatigue chronique afin d’améliorer ou de maintenir sa qualité de vie ?
description: Mémoire de Bachelor : Haute Ecole de la Santé La Source, 2013
Do University International Strategies Deliver What You Expect? An Exploratory Study From A Director Of Marketing Perspective
Creators: name: Mcgonagle-Daly, Tere Denison
Publisher: name: London South Bank University
Year: 2022

description: Purpose – To explore and build on a seminal study that assesses strategic intent and strategic outcomes of selected UK Universities and their approaches to internationalisation, to better understand how these are connected and to take learning around what can be shared by other institutions. This will then be further enhanced through selected interviews with Directors of Marketing in those institutions to explore the marketing contributions made to strategy development and implementation. Research design/methodology/approach – An exploratory study with reference to current literature and through the application of quantitative and qualitative research methods. Findings – Identifies, discusses and compares internationalisation cluster types with the involvement of the Director of Marketing at selected institutions over the period 2003/4 to 2012/13. Research limitations/implications – The paper focuses on the UK only and more specifically MillionPlus Institutions, although the general framework could be applied more widely if information was available. The paper offers a historical review, and any future implications will need to be taken into consideration. Practical implications – This paper provides a very useful source of information for those currently involved in international strategy or planning to assess and reposition effort to deliver on their strategic intent. It also provides some practical recommendations for the involvement of key skills when developing and implementing international strategies, as well as suggestions around structures that may better support operational delivery. Originality/value – This paper is timely in that it provides a working measure of internationalisation effectiveness over a 10-year period, when institutions are reviewing their approaches to marketisation, transnational education and new revenue streams, especially as an outcome of Brexit and COVID-19.
Representations of Gelfand-Graev type for the unitriangular group
Creators: name: Panov, A. N.
Publisher: name: arXiv
Year: 2014
Subjects: subject: Representation Theory (math.RT)
subject: FOS: Mathematics
subject: 20C33

description: We consider the analog of Gelfand-Graev representations of the uniteriangular group. We obtain the decomposition into the sum of irreducible representations, prove that these representations are multiplicity free, calculate the Hecke algebra.}
description: 18 pages
Nineteen vortex equations and integrability
Creators: name: Gudnason, Sven Bjarke
Publisher: name: arXiv
Year: 2022
Subjects: subject: Mathematical Physics (math-ph)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: The class of five integrable vortex equations discussed recently by Manton is extended so it includes the relativistic BPS Chern-Simons vortices, yielding a total of nineteen vortex equations. Not all the nineteen vortex equations are integrable, but four new integrable equations are discovered and we generalize them to infinitely many sets of four integrable vortex equations, with each set denoted by its integer order $n$. Their integrability is similar to the known cases, but give rise to different (generalized) Baptista geometries, where the Baptista metric is a conformal rescaling of the background metric by the Higgs field. In particular, the Baptista manifolds have conical singularities. Where the Jackiw-Pi, Taubes, Popov and Ambjørn-Olesen vortices have conical deficits of $2π$ at each vortex zero in their Baptista manifolds, the higher-order generalizations of these equations are also integrable with larger constant curvatures and a $2πn$ conical deficit at each vortex zero. We then generalize a superposition law, known for Taubes vortices of how to add vortices to a known solution, to all the integrable vortex equations. We find that although the Taubes and the Popov equations relate to themselves, the Ambjørn-Olesen and Jackiw-Pi vortices are added by using the Baptista metric and the Popov equation. Finally, we find many further relations between vortex equations, e.g. we find that the Chern-Simons vortices can be interpreted as Taubes vortices on the Baptista manifold of their own solution.
description: LaTeX: 29 pages, 1 figure, 2 tables; V2: comments added and typos corrected
A mapping approach to surface hopping
Creators: name: Mannouch, Jonathan R.
name: Richardson, Jeremy O.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Chemical Physics (physics.chem-ph)
subject: FOS: Physical sciences

description: We present a nonadiabatic classical-trajectory approach that offers the best of both worlds between fewest-switches surface hopping (FSSH) and quasiclassical mapping dynamics. This mapping approach to surface hopping (MASH) propagates the nuclei on the active adiabatic potential-energy surface, like in FSSH. However, unlike in FSSH, transitions between active surfaces are deterministic and occur when the electronic mapping variables evolve between specified regions of the electronic phase space. This guarantees internal consistency between the active surface and the electronic degrees of freedom throughout the dynamics. MASH is rigorously derivable from exact quantum mechanics, as a limit of the quantum-classical Liouville equation (QCLE), leading to a unique prescription for momentum rescaling and frustrated hops. Hence, a quantum-jump procedure can in principle be used to systematically converge the accuracy of the results to that of the QCLE. This jump procedure also provides a rigorous framework for deriving approximate decoherence corrections similar to those proposed for FSSH. We apply MASH to simulate the nonadiabatic dynamics in various model systems and show that it consistently produces more accurate results than FSSH, at a comparable computational cost.
MPEC 2024-R354 : 2024 RO30
Creators: name: Minor Planet Center Staff
Publisher: name: The Minor Planet Center
Year: 2024
Subjects: subject: Small Solar System bodies
valueUri: http://astrothesaurus.org/uat/1469
subject: 2024 RO30

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.
title: La personne que je soigne m'a demandé de mourir
title: rôle infirmier à la suite d'une demande d'aide au décès dans un contexte de soins
titleType: Subtitle
Creators: name: Ditesheim, Véronique
name: Gilliéron-Tuscher, Ophélie
Publisher: name: Unknown
Year: 0
Subjects: subject: suicide
subject: aide au suicide
subject: accompagnement
subject: fin de vie
subject: souffrance
subject: mort
subject: rôle infirmier

description: Avec la médiatisation du débat sur la fin de vie et l’assistance au suicide, les infirmières sont de plus en plus confrontées à des patients leur exprimant une demande de hâter leur décès. Cela peut occasionner un malaise et une certaine difficulté à savoir comment réagir. Nous avons effectué une revue de littérature internationale afin de mettre en lumière le rôle infirmier et les actions infirmières qui peuvent être proposées dans de telles situations.
description: Mémoire de Bachelor : Haute Ecole de la Santé La Source, 2013
Un’analisi empirica sul ruolo della divergenza di percezioni tra turisti aziende e team di gestione nel Parco del Partenio
Creators: name: Criscitiello, Maria Carmela
Publisher: name: Universita degli studi di Salerno
Year: 2022
Subjects: subject: SECS-P/08 ECONOMIA E GESTIONE DELLE IMPRESE

description: 2020 - 2021