cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Quantum communication with itinerant surface acoustic wave phonons
Creators: name: Dumur, É.
name: Satzinger, K. J.
name: Peairs, G. A.
name: Chou, M. -H.
name: Bienfait, A.
name: Chang, H. -S.
name: Conner, C. R.
name: Grebel, J.
name: Povey, R. G.
name: Zhong, Y. P.
name: Cleland, A. N.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Quantum Physics (quant-ph)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: Surface acoustic waves are commonly used in classical electronics applications, and their use in quantum systems is beginning to be explored, as evidenced by recent experiments using acoustic Fabry-P\'erot resonators. Here we explore their use for quantum communication, where we demonstrate a single-phonon surface acoustic wave transmission line, which links two physically-separated qubit nodes. Each node comprises a microwave phonon transducer, an externally-controlled superconducting variable coupler, and a superconducting qubit. Using this system, precisely-shaped individual itinerant phonons are used to coherently transfer quantum information between the two physically-distinct quantum nodes, enabling the high-fidelity node-to-node transfer of quantum states as well as the generation of a two-node Bell state. We further explore the dispersive interactions between an itinerant phonon emitted from one node and interacting with the superconducting qubit in the remote node. The observed interactions between the phonon and the remote qubit promise future quantum optics-style experiments with itinerant phonons.
description: 15 pages, 9 figures
Agyneta alpica Tanasevitch 2000
Creators: name: Paschetta, Mauro
name: Christille, Claretta
name: Marguerettaz, Fabio
name: Isaia, Marco
Publisher: name: Zenodo
Year: 2016
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Arachnida
Araneae
Linyphiidae
Agyneta
Agyneta alpica

description: Agyneta alpica Tanasevitch, 2000
 LITERATURE. — Negro et al. 2010, 2013; [Rossi & Bosio 2012].
CHOROTYPE. — ALP.
MACROHABITAT. — Alpine prairies.
description: Published as part of Paschetta, Mauro, Christille, Claretta, Marguerettaz, Fabio & Isaia, Marco, 2016, Regional catalogue of the spiders (Arachnida, Araneae) of Aosta Valley (NW Italy), pp. 49-125 in Zoosystema 38 (1) on page 73, DOI: 10.5252/z2016n1a3, http://zenodo.org/record/4578074
The CARMENES search for exoplanets around M dwarfs. Dynamical characterization of the multiple planet system GJ 1148 and prospects of habitable exomoons around GJ 1148 b
Creators: name: Trifonov, T.
name: Lee, M. H.
name: Kürster, M.
name: Henning, Th.
name: Grishin, E.
name: Stock, S.
name: Tjoa, J.
name: Caballero, J. A.
name: Wong, K. H.
name: Bauer, F. F.
name: Quirrenbach, A.
name: Zechmeister, M.
name: Ribas, I.
name: Reffert, S.
name: Reiners, A.
name: Amado, P. J.
name: Kossakowski, D.
name: Azzaro, M.
name: Béjar, V. J. S.
name: Cortés-Contreras, M.
name: Dreizler, S.
name: Hatzes, A. P.
name: Jeffers, S. V.
name: Kaminski, A.
name: Lafarga, M.
name: Montes, D.
name: Morales, J. C.
name: Pavlov, A.
name: Rodríguez-López, C.
name: Schmitt, J. H. M. M.
name: Solano, E.
name: Barnes, R.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: Context. GJ 1148 is an M-dwarf star hosting a planetary system composed of two Saturn-mass planets in eccentric orbits with periods of 41.38 and 532.02 days. Aims. We reanalyze the orbital configuration and dynamics of the GJ 1148 multi-planetary system based on new precise radial velocity (RV) measurements taken with CARMENES. Methods. We combined new and archival precise Doppler measurements from CARMENES with those available from HIRES for GJ 1148 and modeled these data with a self-consistent dynamical model. We studied the orbital dynamics of the system using the secular theory and direct N-body integrations. The prospects of potentially habitable moons around GJ 1148 b were examined. Results. The refined dynamical analyses show that the GJ 1148 system is long-term stable in a large phase-space of orbital parameters with an orbital configuration suggesting apsidal alignment, but not in any particular high-order mean-motion resonant commensurability. GJ 1148 b orbits inside the optimistic habitable zone (HZ). We find only a narrow stability region around the planet where exomoons can exist. However, in this stable region exomoons exhibit quick orbital decay due to tidal interaction with the planet. Conclusions. The GJ 1148 planetary system is a very rare M-dwarf planetary system consisting of a pair of gas giants, the inner of which resides in the HZ. We conclude that habitable exomoons around GJ 1148 b are very unlikely to exist.
description: Accepted for publication in A&A
Rb-induced (3x1) and (6x1) reconstructions on Si(111)-(7x7): A LEED and STM study
Creators: name: Ferbel, Letizia
name: Veronesi, Stefano
name: Heun, Stefan
Publisher: name: arXiv
Year: 2022
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Applied Physics (physics.app-ph)
subject: FOS: Physical sciences

description: We present a study of the rubidium adsorption on the Si(111)-(7x7) surface and the related Rb-induced reconstructions as a function of deposition temperature and Rb-coverage via scanning tunneling microscopy (STM) and low-energy electron diffraction (LEED). Sample analysis via LEED allowed to observe for the first time a Rb/Si(111)-(6x1) reconstruction. The STM image analysis allowed to obtain the first real space characterization of the Rb/Si(111)-(3x1) surface. In addition, STM provided a direct and local information on the surface arrangement as well as further insights on the interaction between Si and Rb atoms and on the growth dynamics.
description: 23 pages, 8 figures, for associated Supporting Information see this URL https://ars.els-cdn.com/content/image/1-s2.0-S0039602821002144-mmc1.pdf
Non-parametric reconstruction of the primordial power spectrum at horizon scales from WMAP data
Creators: name: Tocchini-Valentini, Domenico
name: Hoffman, Yehuda
name: Silk, Joseph
Publisher: name: arXiv
Year: 2005
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We extend to large scales a method proposed in previous work that reconstructs non-parametrically the primordial power spectrum from cosmic microwave background data at high resolution. The improvement is necessary to account for the non-gaussianity of the Wilkinson Microwave Anisotropy Probe (WMAP) likelihood due primarily to cosmic variance. We assume the concordance LambdaCDM cosmology, utilise a smoothing prior and perform Monte Carlo simulations around an initial power spectrum that is scale-free and with spectral index n_s=0.97, very close to the concordance spectrum. The horizon scale for the model we are considering corresponds to the wavenumber k_h=4.52X10^{-4} Mpc^{-1}. We find some evidence for the presence of features and we quantify the probabilities of exceeding the observed deviations in WMAP data with respect to the fiducial models. We detect the following marginal departures from a scale-free (spectral index n_s=0.97) initial spectrum: a cut-off at 0.0001
description: 9 pages, 8 figures. Revised version accepted for publication in MNRAS
Field Conference 1984 of the INQUA Subcommission on Shorelines of Northwestern Europe
Creators: name: Streif, Hansjörg
Publisher: name: Geozon Science Media
Year: 1985

description: Die Veranstaltung umfaßte eine Exkursion entlang einer geologischen Traverse vom Wesermündungs- und Jadebusengebiet über den Unterelberaum, die schleswig-holsteinische und dänische Westküste bis Skagen. Dabei wurden die paläogeographischen Veränderungen der Küstenlinien, die Sedimentabfolgen und zeitliche Einstufung der morphogenetischen Prozesse des Weichsel-Spätglazials und Holozän untersucht. Ein Symposium in Klim, Dänemark, befaßte sich mit gleichen Themen aus dem gesamten Nord- und Ostseebereich.
description: research
Seiberg-Witten Map for D-branes in Large R-R Field Background
Creators: name: Ma, Chen-Te
Publisher: name: arXiv
Year: 2020
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We obtain a Seiberg-Witten map for the gauge sector of multiple D$p$-branes in a large R-R $(p-1)$-form field background up to the first-order in the inverse R-R field background. By applying the Seiberg-Witten map and then electromagnetic duality on the non-commutative D3-brane theory in the large R-R 2-form background, we find the expected commutative diagram of the Seiberg-Witten map and electromagnetic duality. Extending the U(1) gauge group to the U($N$) gauge group, we obtain a commutative description of the D-branes in the large R-R field background. This construction is different from the known result.
description: 18 pages, minor changes, reference changed
title: Re-constructing success: a perspective from small firms' owner-managers
Creators: name: Morel d'Arleux, Corinne
Publisher: name: The Open University
Year: 2000

description: The present dissertation is composed of two main parts. The first step lies in a conceptualisation research effort, which aims at re-constructing success and providing a new understanding of success as a subjective, individual-based concept encompassing three dimensions : professional, familial and personal success. Success is defined as : an ideal state of global satisfaction that may relate to family, personal or work fulfilment feelings, according to individual preferences. The second part is an empirical study which is designed to illustrate this conceptual framework and contribute to extend our knowledge on small firms owner-managers' visions of success. An evaluation method, based on the Index for Global Success (IGS), is elaborated for that purpose. Three analyses are developed : the first one describes the respondents' global characteristics and visions of success, the second study explores males' and females' visions of success, and the last one applies the IGS method to compare high- and low success perceivers, test the link between IGS, business performance and individual satisfaction, and thus test the IGS method relevance. The findings prove that success needs to be studied at the individual's level as a subjective construct and that the use of a composite index to evaluate success enables the gathering of overlapping dimensions composing success. The importance of personal and familial dimensions, beyond professional success, receives empirical support. Females appear to have different visions of success than males, placing higher concern on the personal dimension. Finally, the Index for Global Success enables the testing of subsamples which differ in their levels of satisfaction and firm's performance. Statistical analyses establish that `success' (evaluated through the Index for Global Success), business performance and individual satisfaction are positively correlated. It is concluded that the IGS method is a relevant tool to evaluate success, and that success is a complex rather than simple unidimensional construct.
Zur Korrelation der Glazialfolgen im Saale-Komplex Nord- und Mitteldeutschlands am Beispiel des Tagesbaus Jänschwalde in Brandenburg
Creators: name: Nowel, Werner
Publisher: name: Geozon Science Media
Year: 2003

description: Das Niederlausitzer Braunkohlerevier ist ein Typusgebiet für die Gliederung des Saale-Komplexes in Ostdeutschland; zwischen Holstein und Eem sind hier drei geschiebeanalytisch unterscheidbare Grundmoränen nachgewiesen (Saale I, Saale II und Saale III sensu Cepek). Zur Korrelation dieser Lokalgliederung mit NW-Deutschland und Polen wird ein Lösungsvorschlag unterbreitet, der in Anlehnung an Richter (1968) und Ehlers (1992) von der Existenz zweier Zyklen mit je zwei Glazialfolgen (Phasen, Vorstößen) ausgeht. Der saale-(drenthe-)zeitliche Zyklus begann mit einem westskandinavischen Eisstrom (Glazialfolge Saale 1, "Zeitzer Phase", Haupt-Drenthe, Till-Typ S I) und endete nach Verlagerung der Eisscheide mit einem ostbaltischen Eisstrom (Glazialfolge Saale 2, "Leipziger Phase"). Die Saale 2-Grundmoräne in diesem Verständnis ist ein ostbaltisch dominierter Till, der in Ostdeutschland dem Typ S II sensu Cepek entspricht oder nahe kommt, in NW-Deutschland und den Niederlanden durch die Rote Drenthe-Moräne repräsentiert wird. Der warthezeitliche Zyklus begann mit einem erneuten westskandinavischen Eisstrom (Glazialfolge Warthe 1, "Lausitzer Phase"), dessen maximale Ausdehnung im Wesentlichen mit dem Warthe-Stadium im Sinne von Woldstedt identisch ist, im Nordwesten aber die Lamstedter und Altenwalder Endmoränen mit einschließt. Seine Grundmoräne ist ein Till vom Typ S III sensu Cepek, in Hamburg und Schleswig-Holstein als Niendorf- bzw. Kuden-Till bezeichnet, in Niedersachsen abweichend als "Drenthe 2-Till" interpretiert. Den Abschluß des warthezeitlichen Zyklus bildete nach Verlagerung der Eisscheide wieder ein ostbaltischer Eisstrom (Glazialfolge Warthe 2, „Altmark-Phase"), der zur Ablagerung des Hennstedt-Tills in Schleswig-Holstein, des Fuhlsbüttel-Tills in Hamburg und des Vastorf-Tills in Niedersachsen (den man dort als einzigen Warthe-Till betrachtet) führte. In Ostdeutschland sind ihm Teile des S II-Tills sensu Cepek zuzurechnen, wozu sicher der rote Altmärker Geschiebemergel gehört. Eine Analyse des Kenntnisstandes von Russland bis Nordwestdeutschland belegt zwischen dem saalezeitlichen und dem warthezeitlichen Vereisungszyklus die Existenz einer Wärmeperiode, deren klimastratigraphischer Rang (interglazial oder nur boreal) noch nicht durchgängig geklärt ist. Zwischen den einzelnen Phasen der Vereisungszyklen (Saale 1/Saale 2, Warthe 1/Warthe 2) wird kein Spielraum für warmzeitliche Entwicklungen eingeräumt.
description: research
Agyneta rurestris
Creators: name: Paschetta, Mauro
name: Christille, Claretta
name: Marguerettaz, Fabio
name: Isaia, Marco
Publisher: name: Zenodo
Year: 2016
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Arachnida
Araneae
Linyphiidae
Agyneta
Agyneta rurestris

description: Agyneta rurestris (C. L. Koch, 1836)
NEW DATA. — Pont-Saint-Martin: Natural Reserve of Stagno di Holay, 775 m, wet meadow, 13.VI-4.VII.2011, 1♀, leg. Paschetta & Giuliano; Morgex-La Salle: Natural Reserve of Marais, 900 m, meadow/grove of reeds, 9.VII.2012, 1 ♂, leg. Paschetta.
LITERATURE. — Isaia 2000, [2005]; [Rossi & Bosio 2012].
CHOROTYPE. — PAL.
MACROHABITAT. — Wetlands, alpine prairies.
description: Published as part of Paschetta, Mauro, Christille, Claretta, Marguerettaz, Fabio & Isaia, Marco, 2016, Regional catalogue of the spiders (Arachnida, Araneae) of Aosta Valley (NW Italy), pp. 49-125 in Zoosystema 38 (1) on page 73, DOI: 10.5252/z2016n1a3, http://zenodo.org/record/4578074
Chiral field theories from conifolds
Creators: name: Landsteiner, K.
name: Lazaroiu, C. I.
name: Tatar, Radu
Publisher: name: arXiv
Year: 2003
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We discuss the geometric engineering and large n transition for an N=1 U(n) chiral gauge theory with one adjoint, one conjugate symmetric, one antisymmetric and eight fundamental chiral multiplets. Our IIB realization involves an orientifold of a non-compact Calabi-Yau A_2 fibration, together with D5-branes wrapping the exceptional curves of its resolution as well as the orientifold fixed locus. We give a detailed discussion of this background and of its relation to the Hanany-Witten realization of the same theory. In particular, we argue that the T-duality relating the two constructions maps the Z_2 orientifold of the Hanany-Witten realization into a Z_4 orientifold in type IIB. We also discuss the related engineering of theories with SO/Sp gauge groups and symmetric or antisymmetric matter.
description: 34 pages, 8 figures, v2: References added, minor corrections
Top-k queries over digital traces
Creators: name: Li, Yifan
name: Yu, Xiaohui
name: Koudas, Nick
Publisher: name: arXiv
Year: 2020
Subjects: subject: Databases (cs.DB)
subject: FOS: Computer and information sciences
subject: H.2.0

description: Recent advances in social and mobile technology have enabled an abundance of digital traces (in the form of mobile check-ins, association of mobile devices to specific WiFi hotspots, etc.) revealing the physical presence history of diverse sets of entities (e.g., humans, devices, and vehicles). One challenging yet important task is to identify k entities that are most closely associated with a given query entity based on their digital traces. We propose a suite of indexing techniques and algorithms to enable fast query processing for this problem at scale. We first define a generic family of functions measuring the association between entities, and then propose algorithms to transform digital traces into a lower-dimensional space for more efficient computation. We subsequently design a hierarchical indexing structure to organize entities in a way that closely associated entities tend to appear together. We then develop algorithms to process top-k queries utilizing the index. We theoretically analyze the pruning effectiveness of the proposed methods based on a mobility model which we propose and validate in real life situations. Finally, we conduct extensive experiments on both synthetic and real datasets at scale, evaluating the performance of our techniques both analytically and experimentally, confirming the effectiveness and superiority of our approach over other applicable approaches across a variety of parameter settings and datasets.
description: Accepted by SIGMOD2019. Proceedings of the 2019 International Conference on Management of Data
Improving the diameters of interferometric calibrators with MATISSE
Creators: name: Robbe-Dubois, S.
name: Cruzalèbes, P.
name: Berio, Ph.
name: Meilland, A.
name: Petrov, R. -G.
name: Allouche, F.
name: Salabert, D.
name: Paladini, C.
name: Matter, A.
name: Millour, F.
name: Lagarde, S.
name: Lopez, B.
name: Burtscher, L.
name: Jaffe, W.
name: Hron, J.
name: Percheron, I.
name: van Boekel, R.
name: Weigelt, G.
name: Stee, Ph.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: FOS: Physical sciences

description: A good knowledge of the angular diameters of stars used to calibrate the observables in stellar interferometry is fundamental. As the available precision for giant stars is worse than the required per cent level, we aim to improve the knowledge of many diameters using MATISSE (Multiple AperTure mid-Infrared SpectroScopic Experiment) data in its different instrumental configurations. Using the squared visibility MATISSE observable, we compute the angular diameter value, which ensures the best-fitting curves, assuming an intensity distribution of a uniform disc. We take into account that the transfer function varies over the wavelength and is different from one instrumental configuration to another. The uncertainties on the diameters are estimated using the residual bootstrap method. Using the low spectral resolution mode in the L band, we observed a set of 35 potential calibrators selected in the Mid-infrared stellar Diameter and Flux Compilation Catalogue with diameters ranging from about 1 to 3 mas. We reach a precision on the diameter estimates in the range 0.6 per cent to 4.1 per cent. The study of the stability of the transfer function in visibility over two nights makes us confident in our results. In addition, we identify one star, 75 Vir initially present in the calibrator lists, for which our method does not converge, and prove to be a binary star. This leads us to the conclusion that our method is actually necessary to improve the quality of the astrophysical results obtained with MATISSE, and that it can be used as a useful tool for 'bad calibrator' detection.
Hinweise auf eine Vergletscherung des Kemptener Beckens (Südwest-Bayern) im Mittleren Würm
Creators: name: Link, Arne
name: Preusser, Frank
Publisher: name: Geozon Science Media
Year: 2005

description: In den glazial übertieften Becken des würmzeitlichen Illergletschers wurden Untersuchungen zur Lagerung (Bohr- und Aufschlussdaten) und zur Chronologie (Lumineszenzdatierungen) limnischer Sedimente durchgeführt. Die Ergebnisse belegen drei getrennte Phasen mit einer Akkumulation von feinkörnigen lakustrinen Beckensedimenten im Bereich des Kemptener Beckens, die dem späten Hochglazial (Marines Isotopen-Stadium 2), dem Mittleren Würm (MIS 3) und dem Präwürm zugeordnet werden. Die Sedimentabfolgen dokumentieren mit ihrem typischen Profilaufbau (Tillkomplex an der Basis; Bänderschluffe mit dropstones; Bänderschluffe), dass im Bereich des Kemptener Beckens in den drei genannten Zeitbereichen jeweils eine Vergletscherung mit Eiszerfall und abschließender Seephase nachzuweisen ist. Die mittelwürmzeitlichen Sedimentabfolgen sind stratigraphisch von besonderer Bedeutung, da sie auf eine Vergletscherung des Kemptener Beckens hinweisen, die unter Berücksichtigung regionaler und überregionaler Klimaarchive dem MIS 4 zugeordnet wird. Entsprechende Eisrandlagen konnten bisher an der Reliefoberfläche nicht eindeutig nachgewiesen werden, da sie mit dem Eisvorstoß zum Würmhochstand (MIS 2) vermutlich überfahren und verschliffen wurden.
description: research
N=2 Superconformal boundary states for free bosons and fermions
Creators: name: Gaberdiel, Matthias R.
name: Klemm, Hanno
Publisher: name: arXiv
Year: 2004
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: The most general N=2 superconformal boundary states for the c=3 theory consisting of two (uncompactified) free bosons and fermions are constructed. It is shown that the only N=2 boundary states are the familiar Dirichlet boundary states, as well as the Neumann boundary states with an arbitrary electric field.
description: 20 pages, latex, references added, discussion of GSO projection clarified
Bounds for the size of sets with the property D(n)
Creators: name: Dujella, Andrej
Publisher: name: arXiv
Year: 2003
Subjects: subject: Number Theory (math.NT)
subject: FOS: Mathematics
subject: 11D45, 11D09, 11N36

description: Let n be a nonzero integer and a_1 < a_2 < ... 400.
description: 9 pages. Revised - removed a gap in the proof of Proposition 1; to appear in Glasnik Matematicki
Interpreting the Observed Clustering of Red Galaxies at z~3
Creators: name: Zheng, Zheng
Publisher: name: arXiv
Year: 2003
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Daddi et al. have recently reported strong clustering of a population of red galaxies at z~3 in the Hubble Deep Field-South. Fitting the observed angular clustering with a power law of index -0.8, they infer a comoving correlation length r_0~8 Mpc/h; for a standard cosmology, this r_0 would imply that the red galaxies reside in rare, M>10^{13} Msun/h halos, with each halo hosting ~100 galaxies to match the number density of the population. Using the framework of the halo occupation distribution (HOD) in a $Λ$CDM universe, we show that the Daddi et al. data can be adequately reproduced by less surprising models, e.g., models with galaxies residing in halos of mass M>M_min=6.3x10^{11} Msun/h and a mean occupation Navg(M)=1.4(M/M_min)^{0.45} above this cutoff. The resultant correlation functions do not follow a strict power law, showing instead a clear transition from the 1-halo dominated regime, where the two galaxies of each pair reside in the same dark matter halo, to the 2-halo dominated regime, where the two galaxies of each pair are from different halos. The observed high-amplitude data points lie in the one-halo-dominated regime, so these HOD models are able to explain the observations despite having smaller correlation lengths, r_0~5 Mpc/h. HOD parameters are only loosely constrained by the current data because of large sample variance and the lack of clustering information on scales that probe the 2-halo regime. If our explanation of the data is correct, then future observations covering a larger area should show that the large scale correlations lie below a θ^{-1.8} extrapolation of the small scale points. Our models of the current data suggest that the red galaxies are somewhat more strongly clustered than UV-selected Lyman-break galaxies and have a greater tendency to reside in small groups.
description: 16 pages, 2 figures. To appear in ApJ (July 20th, 2004). Minor revisions to match the version in press
The infrared view of dust and molecules around V4334 Sgr (Sakurai's Object): a 20-year retrospective
Creators: name: Evans, A.
name: Gehrz, R. D.
name: Woodward, C. E.
name: Banerjee, D. P. K.
name: Geballe, T. R.
name: Clayton, G. C.
name: Sarre, P. J.
name: Starrfield, S.
name: Hinkle, K.
name: Joyce, R. R.
name: Lykou, Foteini
name: Helton, L. A.
name: Eyres, S. P. S.
name: Worters, H.
name: Montiel, E. J.
name: Liimets, T.
name: Zijlstra, A.
name: Richter, M.
name: Krautter, J.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We present an analysis of the evolution of circumstellar dust and molecules in the environment of the very late thermal pulse object V4334 Sgr (Sakurai's Object) over a $\sim20$-year period, drawing on ground-, airborne- and space-based infrared photometry and spectroscopy. The dust emission, which started in 1997, resembles a blackbody that cooled from $\sim1200$K in 1998 August to $\sim180$K in 2016 July. The dust mass, assuming amorphous carbon, was $\sim5\times10^{-10}$M$_\odot$ in 1998 August, and we estimate that the total dust mass was $\sim2\times10^{-5}$M$_\odot$ by $\sim2016$. The appearance of a near infrared excess in 2008 suggests a new episode of (or renewed) mass loss began then. We infer lower limits on the bolometric luminosity of the embedded star from that of the dust shell, which rose to $\sim16000$L$_\odot$ before declining to $\sim3000$L$_\odot$. There is evidence for weak 6-7$μ$m absorption, which we attribute to hydrogenated amorphous carbon formed in material ejected by Sakurai's Object during a mass ejection phase that preceded the 1997 event. We detect small hydrocarbon and other molecules in the spectra, and trace the column densities in hydrogen cyanide (HCN) and acetylene (C$_2$H$_2$). We use the former to determine the $^{12}$C/$^{13}$C ratio to be $6.4\pm0.7$, 14 times smaller than the Solar System value.
Remote Casework: For Child Welfare Stakeholders in the Time of COVID-19 - Child Welfare Workers Guidance
Creators: name: IHeartTech
name: Sage, Melanie
name: Hitchcock, Laurel
Publisher: name: figshare
Year: 2020
Subjects: subject: 160799 Social Work not elsewhere classified
subject: FOS: Sociology
subject: 160701 Clinical Social Work Practice

description: This handout provides evidence-informed guidance for child welfare stakeholders about the use of technology for remote and virtual casework during COVID-19. Best practices and tips are provided for child welfare workers only.
These are evidence-informed best practices only. They may not meet standards for an individual agency; local, state and federal regulations; and licensing bodies. Always consult with with appropriate authorities and stay up-to-date on research and protocols related to the use of technology in child welfare.
DeepSight: Mitigating Backdoor Attacks in Federated Learning Through Deep Model Inspection
Creators: name: Rieger, Phillip
name: Nguyen, Thien Duc
name: Miettinen, Markus
name: Sadeghi, Ahmad-Reza
Publisher: name: arXiv
Year: 2022
Subjects: subject: Cryptography and Security (cs.CR)
subject: Machine Learning (cs.LG)
subject: FOS: Computer and information sciences

description: Federated Learning (FL) allows multiple clients to collaboratively train a Neural Network (NN) model on their private data without revealing the data. Recently, several targeted poisoning attacks against FL have been introduced. These attacks inject a backdoor into the resulting model that allows adversary-controlled inputs to be misclassified. Existing countermeasures against backdoor attacks are inefficient and often merely aim to exclude deviating models from the aggregation. However, this approach also removes benign models of clients with deviating data distributions, causing the aggregated model to perform poorly for such clients. To address this problem, we propose DeepSight, a novel model filtering approach for mitigating backdoor attacks. It is based on three novel techniques that allow to characterize the distribution of data used to train model updates and seek to measure fine-grained differences in the internal structure and outputs of NNs. Using these techniques, DeepSight can identify suspicious model updates. We also develop a scheme that can accurately cluster model updates. Combining the results of both components, DeepSight is able to identify and eliminate model clusters containing poisoned models with high attack impact. We also show that the backdoor contributions of possibly undetected poisoned models can be effectively mitigated with existing weight clipping-based defenses. We evaluate the performance and effectiveness of DeepSight and show that it can mitigate state-of-the-art backdoor attacks with a negligible impact on the model's performance on benign data.
description: 18 pages, 8 figures; to appear in the Network and Distributed System Security Symposium (NDSS)
title: Cognitive-behaviour therapy for psychosis : individual accounts of the therapeutic process in successful and less successful outcomes
Creators: name: McGowan, John F.
Publisher: name: The Open University
Year: 2000

description: Despite a historical pessimism about the possibility of helping people with schizophrenia using psychological therapies, a great deal of progress has been made recently using cognitive-behavioural therapy (CBT) approaches. These treatments have been developed from changing understandings of schizophrenia, and focus on reducing the distress of psychotic symptoms through coping strategies and altering distressing beliefs. There is increasing evidence that suggests CBT may be helpful for a significant portion of people with psychosis. Limited information on the factors implicated in differing outcomes is available. The present study investigated factors differentiating individuals with good and poor outcomes on the basis of accounts of CBT for psychosis from eight therapist/client dyads. Four therapists and eight of their clients (two associated with each therapist) were interviewed about their experiences of CBT. Topics covered included, effect of the therapy, elements felt to be helpful and the therapeutic relationship. Interview data was analysed using a qualitative, "grounded theory", methodology. The analysis produced a number of major categories which differentiated clients who progressed and did not progress in CBT. These included ability to let go of distressing beliefs, logical thought, holding therapy, and presence of a shared goal. Overall, clients who progressed were better able to understand, hold and engage with ideas put forward by the therapist. Additionally, clients' views of CBT were positive and therapists and clients felt that non-specific benefits accrued from the therapy even when CBT specific progress did not occur. The results were consistent with previous studies suggesting that ability to consider disengaging from distressing beliefs are important in therapeutic progression. However further research is required to clarify the role of logical thought, holding therapy and therapeutic alliance in progress and in predicting outcome. Reasons considered for the inability to progress include, emotional investment in psychotic beliefs and information processing factors.
Meeresspiegeldaten aus landschafts— und siedlungsgeschichtlichen Untersuchungen auf Pellworm (Nordfriesische Inseln)
Creators: name: Hoffmann, Dietrich
Publisher: name: Geozon Science Media
Year: 1980

description: Es wird über archäologische, geographische und geologische Arbeiten zur Landschafts- und Besiedlungsgeschichte des südlichen nordfriesischen Wattenmeeres berichtet. Bei der Untersuchung von mittelalterlichen und frühneuzeitlichen Siedlungsplätzen und deren Untergrund auf der Insel Pellworm konnten u. a. neue Daten zur örtlichen Veränderung des Meeresspiegels im Holozän nachgewiesen werden: Danach hatte das Mittlere Tidehochwasser bereits in der zweiten Hälfte des letzten Jahrtausends vor Chr. Geb. eine Höhe von NN + 0,8 m erreicht, fiel danach jedoch wieder ab und stieg mit Beginn des zweiten Jahrtausends nach Chr. Geb. wieder an.
description: research
Lyapunov exponent in the Vicsek model
Creators: name: Miranda-Filho, L. H.
name: Sobral, T. A.
name: de Souza, A. J. F.
name: Elskens, Y.
name: Romaguera, Antonio R. de C.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Soft Condensed Matter (cond-mat.soft)
subject: Chaotic Dynamics (nlin.CD)
subject: FOS: Physical sciences

description: The well-known Vicsek model describes the dynamics of a flock of self-propelled particles (SPPs). Surprisingly, there is no direct measure of the chaotic behavior of such systems. Here, we discuss the dynamical phase transition present in Vicsek systems in light of the largest Lyapunov exponent (LLE), which is numerically computed by following the dynamical evolution in tangent space for up to two million SPPs. As discontinuities in the neighbor weighting factor hinder the computations, we propose a smooth form of the Vicsek model. We find a chaotic regime for the collective behavior of the SPPs based on the LLE. The dependence of LLE with the applied noise, used as a control parameter, changes sensibly in the vicinity of the well-known transition points of the Vicsek model.
description: 7 pages, 16 equations, 6 figures
Production of styrene oxide from styrene by a recombinant Escherichia coli with enhanced AcrAB-TolC efflux pump level in an aqueous-organic solvent two-phase system
Creators: name: Doukyu, Noriyuki
name: Iida, Shinichiro
Publisher: name: Taylor & Francis
Year: 2020
Subjects: subject: Biochemistry
subject: Space Science
subject: Microbiology
subject: FOS: Biological sciences
subject: Biotechnology
subject: Evolutionary Biology
subject: 39999 Chemical Sciences not elsewhere classified
subject: FOS: Chemical sciences
subject: Ecology
subject: 69999 Biological Sciences not elsewhere classified
subject: Inorganic Chemistry

description: The AcrAB-TolC efflux pump is involved in the organic solvent tolerance of Escherichia coli. Most E. coli strains are highly sensitive to organic solvents such as n-hexane and cyclohexane. Here, a recombinant E. coli transformed with an expression plasmid containing acrAB and tolC became tolerant to n-hexane and cyclohexane. The levels of AcrA, AcrB, and TolC in the recombinant increased by 3- to 5-fold compared to those in the control strain without the plasmid for acrAB or tolC. To investigate the usability of the recombinant as a biocatalyst in an aqueous-organic solvent two-phase system, we further introduced xylMA xylene monooxygenase genes from Pseudomonas putida mt-2 into the recombinant and examined the production of styrene oxide from styrene. The resulting recombinant produced 1.8 mg and 1.0 mg styrene oxide mL−1 of medium in a medium overlaid with a 25% volume of n-hexane and cyclohexane containing 10% (wt vol−1) styrene, respectively. A recombinant Escherichia coli with enhanced AcrAB-TolC efflux pump level increased production of styrene oxide from styrene in an aqueous-organic solvent two-phase system.
FaceQgen: Semi-Supervised Deep Learning for Face Image Quality Assessment
Creators: name: Hernandez-Ortega, Javier
name: Fierrez, Julian
name: Serna, Ignacio
name: Morales, Aythami
Publisher: name: arXiv
Year: 2022
Subjects: subject: Computer Vision and Pattern Recognition (cs.CV)
subject: Image and Video Processing (eess.IV)
subject: FOS: Computer and information sciences
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: In this paper we develop FaceQgen, a No-Reference Quality Assessment approach for face images based on a Generative Adversarial Network that generates a scalar quality measure related with the face recognition accuracy. FaceQgen does not require labelled quality measures for training. It is trained from scratch using the SCface database. FaceQgen applies image restoration to a face image of unknown quality, transforming it into a canonical high quality image, i.e., frontal pose, homogeneous background, etc. The quality estimation is built as the similarity between the original and the restored images, since low quality images experience bigger changes due to restoration. We compare three different numerical quality measures: a) the MSE between the original and the restored images, b) their SSIM, and c) the output score of the Discriminator of the GAN. The results demonstrate that FaceQgen's quality measures are good estimators of face recognition accuracy. Our experiments include a comparison with other quality assessment methods designed for faces and for general images, in order to position FaceQgen in the state of the art. This comparison shows that, even though FaceQgen does not surpass the best existing face quality assessment methods in terms of face recognition accuracy prediction, it achieves good enough results to demonstrate the potential of semi-supervised learning approaches for quality estimation (in particular, data-driven learning based on a single high quality image per subject), having the capacity to improve its performance in the future with adequate refinement of the model and the significant advantage over competing methods of not needing quality labels for its development. This makes FaceQgen flexible and scalable without expensive data curation.
Remote Casework: For Child Welfare Stakeholders in the Time of COVID-19 - Child Welfare Agency Guidance
Creators: name: IHeartTech
name: Sage, Melanie
name: Hitchcock, Laurel
Publisher: name: figshare
Year: 2020
Subjects: subject: 160701 Clinical Social Work Practice
subject: FOS: Sociology
subject: 160799 Social Work not elsewhere classified

description: This handout provides evidence-informed guidance for child welfare stakeholders about the use of technology for remote and virtual casework during COVID-19. Best practices and tips are provided for child welfare agencies only.
These are evidence-informed best practices only. They may not meet standards for an individual agency; local, state and federal regulations; and licensing bodies. Always consult with with appropriate authorities and stay up-to-date on research and protocols related to the use of technology in child welfare.
Orienteering problem with time-windows and updating delay
Creators: name: Demange, Marc
name: Ellison, David
name: Jouve, Bertrand
Publisher: name: arXiv
Year: 2022
Subjects: subject: Discrete Mathematics (cs.DM)
subject: FOS: Computer and information sciences

description: The Orienteering Problem with Time Window and Delay (\OPTiWinD) is a variant of the online orienteering problem. A series of requests appear in various locations while a vehicle moves within the territory to serve them. Each request has a time window during which it can be served and a weight which describes its importance. There is also a minimum delay $T$ between successive requests. The objective is to find a path for the vehicles that maximises the sum of the weights of the requests served. We further assume that the length of each time window is equal to the diameter of the territory. We study the optimal performance and competitive ratio for the set of instances with $n$ requests. We obtain complete resolution for $T$ at least half of the diameter, small values of $T$ or small values of $n$, as well as partial results in the remaining cases.
Anguliphantes monticola
Creators: name: Paschetta, Mauro
name: Christille, Claretta
name: Marguerettaz, Fabio
name: Isaia, Marco
Publisher: name: Zenodo
Year: 2016
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Arachnida
Araneae
Linyphiidae
Anguliphantes
Anguliphantes monticola

description: Anguliphantes monticola (Kulczyński, 1881)
 LITERATURE. — Calloni 1889; [Pavesi 1904]; [Isaia 2005]; Negro et al. 2010.
CHOROTYPE. — EUR.
MACROHABITAT. — Not specified.
NOTES.— Records by Calloni (1889) possibly refer to Simon (1881), reporting material collected in Valais (Switzerland).
description: Published as part of Paschetta, Mauro, Christille, Claretta, Marguerettaz, Fabio & Isaia, Marco, 2016, Regional catalogue of the spiders (Arachnida, Araneae) of Aosta Valley (NW Italy), pp. 49-125 in Zoosystema 38 (1) on page 73, DOI: 10.5252/z2016n1a3, http://zenodo.org/record/4578074
Infrared properties of Planetary Nebulae with [WR] and $wels$ central stars
Creators: name: Muthumariappan, C.
name: Parthasarathy, M.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We report the IR properties of planetary nebulae with WR type and $wels$ central stars known to date and compare them with the IR properties of a sample of PNe with H-rich central stars. We use near-, mid- and far-IR photometric data from archives to derive the IR properties of PNe. We have constructed IR colour-colour diagrams of PNe using measurements from $2MASS$, $IRAS$, $WISE$ and $Akari$ bands. [WR] PNe have a larger near-IR emission from the hot dust component and also show a tendency for stronger 12$μ$m emission as compared to the other two groups. Cool AGB dust properties of all PNe are found to be similar. We derived the dust colour temperatures, dust masses, dust-to-gas mass ratios, IR luminosities and IR excess of PNe for these three groups. [WR] PNe and $wels$-PNe tend to have larger mean values for dust mass when compared to the third group. The average dust-to-gas mass ratio is found to be similar for the three groups of PNe. While there is a strong correlation of dust temperature and IR luminosity with the age for the three groups of PNe, the dust mass, dust-to-gas mass ratios and IR excess are found to be non-varying as the PNe evolve. [WR] PNe and $wels$-PNe show very similar distribution of excitation classes and also show similar distribution with Galactic latitude.
description: Accepted for publication in MNRAS
Handover Experiments with UAVs: Software Radio Tools and Experimental Research Platform
Creators: name: Powell, Keith
name: Yingst, Andrew
name: Rahman, Talha Faizur
name: Marojevic, Vuk
Publisher: name: arXiv
Year: 2022
Subjects: subject: Signal Processing (eess.SP)
subject: Hardware Architecture (cs.AR)
subject: Networking and Internet Architecture (cs.NI)
subject: FOS: Electrical engineering, electronic engineering, information engineering
subject: FOS: Computer and information sciences

description: Mobility management is the key feature of cellular networks. When integrating unmanned aerial vehicles (UAVs) into cellular networks, their cell association needs to be carefully managed for coexistence with other cellular users. UAVs move in three dimensions and may traverse several cells on their flight path, and so may be subject to several handovers. In order to enable research on mobility management with UAV users, this paper describes the design, implementation, and testing methodology for handover experiments with aerial users. We leverage software-defined radios (SDRs) and implement a series of tools for preparing the experiment in the laboratory and for taking it outdoors for field testing. We use solely commercial off-the-shelf hardware, open-source software, and an experimental license to enable reproducible and scalable experiments. Our initial outdoor results with two SDR base stations connected to an open-source software core network, implementing the 4G long-term evolution protocol, and one low altitude UAV user equipment demonstrate the handover process.
description: This article has been accepted for publication in WiNTECH'21
Correlation energy contribution to nuclear masses
Creators: name: Baroni, S.
name: Armati, M.
name: Barranco, F.
name: Broglia, R. A.
name: Colo', G.
name: Gori, G.
name: Vigezzi, E.
Publisher: name: arXiv
Year: 2004
Subjects: subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: The ground state correlation energies associated with collective surface and pairing vibrations are calculated for Pb- and Ca-isotopes. It is shown that this contribution, when added to those predicted by one of the most accurate modern nuclear mass formula (HFBCS MSk7 mass formula), reduces the associated rms error by an important factor, making mean field theory, once its time dependence is taken into account, a quantitative predictive tool for nuclear masses.
description: 4 pages, 2 figures, RevTeX4
Velocity and processivity of helicase unwinding of double-stranded nucleic acids
Creators: name: Betterton, M. D.
name: Julicher, Frank
Publisher: name: arXiv
Year: 2005
Subjects: subject: Biological Physics (physics.bio-ph)
subject: Soft Condensed Matter (cond-mat.soft)
subject: Biomolecules (q-bio.BM)
subject: FOS: Physical sciences
subject: FOS: Biological sciences

description: Helicases are molecular motors which unwind double-stranded nucleic acids (dsNA) in cells. Many helicases move with directional bias on single-stranded (ss) nucleic acids, and couple their directional translocation to strand separation. A model of the coupling between translocation and unwinding uses an interaction potential to represent passive and active helicase mechanisms. A passive helicase must wait for thermal fluctuations to open dsNA base pairs before it can advance and inhibit NA closing. An active helicase directly destabilizes dsNA base pairs, accelerating the opening rate. Here we extend this model to include helicase unbinding from the nucleic-acid strand. The helicase processivity depends on the form of the interaction potential. A passive helicase has a mean attachment time which does not change between ss translocation and ds unwinding, while an active helicase in general shows a decrease in attachment time during unwinding relative to ss translocation. In addition, we describe how helicase unwinding velocity and processivity vary if the base-pair binding free energy is changed.
description: To appear in special issue on molecular motors, Journal of Physics - Condensed Matter
HIST 288-001 : Oliver Stone's America - course syllabus
Creators: name: Kuznick, Peter
Publisher: name: American University (Washington, D.C.). College of Arts and Sciences; American University. Department of History
Year: 2023
Subjects: classificationCode: 39
subject: Education
classificationCode: 3901
subject: Curriculum and pedagogy
classificationCode: 4303
subject: Historical studies

description: 5 pages.
Many-body exciton and inter-valley correlations in heavily electron-doped WSe$_2$ monolayers
Creators: name: Li, Jing
name: Goryca, Mateusz
name: Choi, Junho
name: Xu, Xiaodong
name: Crooker, Scott A.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: In monolayer transition-metal dichalcogenide semiconductors, many-body correlations can manifest in optical spectra when photoexcited electron-hole pairs (excitons) are introduced into a 2D Fermi sea of mobile carriers. At low carrier densities, the formation of positively and negatively charged excitons ($X^\pm$) is well documented. However, in WSe$_2$ monolayers, an additional absorption resonance, often called $X^{-\prime}$, emerges at high electron density. Its origin is not understood. Here we investigate the $X^{-\prime}$ state via polarized absorption spectroscopy of electrostatically-gated WSe$_2$ monolayers in high magnetic fields to 60~T. Field-induced filling and emptying of the lowest optically-active Landau level in the $K'$ valley causes repeated quenching of the corresponding optical absorption. Surprisingly, however, these quenchings are accompanied by absorption changes to higher-lying Landau levels in both $K'$ and $K$ valleys, which are unoccupied. These results cannot be reconciled within a single-particle picture, and demonstrate the many-body nature and inter-valley correlations of the $X^{-\prime}$ quasiparticle state.
description: 3 figures, 7 pages, in press at Nano Letters