cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Photodynamical Modeling of the Fascinating Eclipses in the Triple-Star System KOI-126
Creators: name: Yenawine, Mitchell E.
name: Welsh, William F.
name: Orosz, Jerome A.
name: Bieryla, Allyson
name: Cochran, William D.
name: Endl, Michael
name: Latham, David W.
name: Quinn, Samuel N.
name: Short, Donald R.
name: Windmiller, Gur
Publisher: name: arXiv
Year: 2021
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: We explore the fascinating eclipses and dynamics of the compact hierarchical triple star system KOI-126 (KIC 5897826). This system is comprised of a pair of M-dwarf stars (KOI-126 B and C) in a 1.74 day orbit which revolve around an F-star (KOI-126 A) every 34 days. Complex eclipse shapes are created as the M stars transit the F star, due to two effects: (i) the duration of the eclipse is a significant fraction of the M-star orbital period, so the prograde or retrograde motion of the M stars in their orbit lead to unusually short or long duration eclipses; (ii) due to 3-body dynamics, the M-star orbit precesses with an astonishingly quick timescale of 1.74 years for the periastron (apsidal) precession, and 2.73 years for the inclination and nodal angle precession. Using the full Kepler data set, supplemented with ground-based photometry, plus 29 radial velocity measurements that span 6 years, our photodynamical modeling yields masses of $M_{A} = 1.2713 \pm 0.0047 M_{\odot}$ (0.37%), $M_{B} = 0.23529 \pm 0.00062 M_{\odot}$ (0.26%), and $M_{C} = 0.20739 \pm 0.00055 M_{\odot}$ (0.27%) and radii of $R_{A} = 1.9984 \pm 0.0027 R_{\odot}$ (0.14%), $R_{B}= 0.25504 \pm 0.00076 R_{\odot}$ (0.3%), and $R_{C} = 0.23196 \pm 0.00069 R_{\odot}$ (0.3%). We also estimate the apsidal motion constant of the M-dwarfs, a parameter that characterizes the internal mass distribution. While not particularly precise, we measure a mean apsidal motion constant, $\overline{k_{2}}$, of $ 0.046^{+0.046}_{-0.028}$, which is approximately 2-$σ$ lower than the theoretical model prediction of 0.150. We explore possible causes for this discrepancy.
description: 30 pages, 17 figures, submitted to ApJ
Nonlinear viscous hydrodynamics in various dimensions using AdS/CFT
Creators: name: Haack, Michael
name: Yarom, Amos
Publisher: name: arXiv
Year: 2008
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We compute coefficients of two-derivative terms in the hydrodynamic energy momentum tensor of a viscous fluid which has an AdS_D dual with D between 3 and 7. For the case of D=3 we obtain an exact AdS_3 black hole solution, valid to all orders in a derivative expansion, dual to a perfect fluid in 1+1 dimensions.
description: 20 pages; typos corrected, references added
Thermal Instabilities and Shattering in the High-Redshift WHIM: Convergence Criteria and Implications for Low-Metallicity Strong HI Absorbers
Creators: name: Mandelker, Nir
name: Bosch, Frank C. van den
name: Springel, Volker
name: van de Voort, Freeke
name: Burchett, Joseph N.
name: Butsky, Iryna S.
name: Nagai, Daisuke
name: Oh, S. Peng
Publisher: name: arXiv
Year: 2021
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: Using a novel suite of cosmological simulations zooming in on a Mpc-scale intergalactic sheet or "pancake" at z~3-5, we conduct an in-depth study of the thermal properties and HI content of the warm-hot intergalactic medium (WHIM) at those redshifts. The simulations span nearly three orders of magnitude in gas-cell mass, from ~(7.7x10^6-1.5x10^4)Msun, one of the highest resolution simulations of such a large patch of the inter-galactic medium (IGM) to date. At z~5, a strong accretion shock develops around the main pancake following a collision between two smaller sheets. Gas in the post-shock region proceeds to cool rapidly, triggering thermal instabilities and the formation of a multiphase medium. We find neither the mass, nor the morphology, nor the distribution of HI in the WHIM to be converged at our highest resolution. Interestingly, the lack of convergence is more severe for the less dense, more metal-poor, intra-pancake medium (IPM) in between filaments and far from any star-forming galaxies. As the resolution increases, the IPM develops a shattered structure, with ~kpc scale clouds containing most of the HI. From our lowest to highest resolution, the covering fraction of metal-poor (Z<10^{-3}Zsun) Lyman-limit systems (NHI>10^{17.2}/cm^2) in the IPM at z~4 increases from (3-15)%, while that of Damped Lyman-alpha Absorbers (NHI>10^{20}/cm^2) with similar metallicity increases threefold, from (0.2-0.6)%, with no sign of convergence. We find that a necessary condition for the formation of a multiphase, shattered structure is resolving the cooling length, lcool=cs*tcool, at T~10^5K. If this scale is unresolved, gas "piles up" at these temperatures and cooling to lower temperatures becomes very inefficient. We conclude that state-of-the-art cosmological simulations are still unable to resolve the multi-phase structure of the low-density IGM, with potentially far-reaching implications.
description: 24 pages, 15 (rather large) figures, 2 tables, 1 appendix (main body 21 pages) Comments welcome! Main observational results in sections 3-4 (Table 2) Main theory result in section 6.1
Boundary value problems on non-Lipschitz uniform domains: Stability, compactness and the existence of optimal shapes
Creators: name: Hinz, Michael
name: Rozanova-Pierrat, Anna
name: Teplyaev, Alexander
Publisher: name: arXiv
Year: 2021
Subjects: subject: Analysis of PDEs (math.AP)
subject: Functional Analysis (math.FA)
subject: Optimization and Control (math.OC)
subject: FOS: Mathematics
subject: 28A80, 35A23, 35A30, 35J25, 47A07, 47A10, 47B25, 49Q10

description: We study boundary value problems for bounded uniform domains in $\mathbb{R}^n$, $n\geq 2$, with non-Lipschitz (and possibly fractal) boundaries. We prove Poincaré inequalities with trace terms and uniform constants for uniform $(\varepsilon,\infty)$-domains within bounded common confinements. We then introduce generalized Dirichlet, Robin and Neumann problems for Poisson type equations and prove the Mosco convergence of the associated energy functionals along sequences of suitably converging domains. This implies a stability result for weak solutions, and this also implies the norm convergence of the associated resolvents and the convergence of the corresponding eigenvalues and eigenfunctions. Based on our earlier work, we prove compactness results for parametrized classes of admissible domains, energy functionals and weak solutions. Using these results, we can verify the existence of optimal shapes in these classes.
Critical behavior at edge singularities in one dimensional spin models
Creators: name: Dalmazi, D.
name: Sá, F. L.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: In ferromagnetic spin models above the critical temperature ($T > T_{cr}$) the partition function zeros accumulate at complex values of the magnetic field ($H_E$) with a universal behavior for the density of zeros $ρ(H) \sim | H - H_E |^{\sg}$. The critical exponent $\sg$ is believed to be universal at each space dimension and it is related to the magnetic scaling exponent $y_h$ via $\sg = (d-y_h)/y_h$. In two dimensions we have $y_h=12/5 (\sg = -1/6)$ while $y_h=2 (\sg=-1/2)$ in $d=1$. For the one dimensional Blume-Capel and Blume-Emery-Griffiths models we show here, for different temperatures, that a new value $y_h=3 (\sg =-2/3)$ can emerge if we have a triple degeneracy of the transfer matrix eigenvalues.
description: to appear in Phys. Rev. E, 16 pages, 3 figures
Gradient measurement of synchrotron polarization diagnostic: Application to spatially separated emission and Faraday rotation regions
Creators: name: Wang, Ru-Yue
name: Zhang, Jian-Fu
name: Lazarian, Alex
name: Xiao, Hua-Ping
name: Xiang, Fu-Yuan
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: Considering the spatially separated polarization radiation and Faraday rotation regions to simulate complex interstellar media, we study synchrotron polarization gradient techniques' measurement capabilities. We explore how to trace the direction of projected magnetic field of emitting-source region at the multi-frequency bands, using the gradient technique compared with the traditional polarization vector method. Furthermore, we study how Faraday rotation density in the foreground region, i.e., a product of electron number density and parallel component of magnetic fields along the line of sight, affects the measurement of projected magnetic field. Numerical results show that synchrotron polarization gradient technique could successfully trace projected magnetic field within emitting-source region independent of radio frequency. Accordingly, the gradient technique can measure the magnetic field properties for a complex astrophysical environment.
description: 12 pages, 13 figures, Accepted by MNRAS
Reviewessay: Nachbarn: Ein österreichisch-tschechisches Geschichtsbuch
Creators: name: Brousek, Karl
name: Antošíková, Lucie
Publisher: name: Medienimpulse
Year: 2020

description: Funktionierende Beziehungen mit Menschen in Nachbarschaft sind die grundlegende Voraussetzung für Lebensqualität. Dasselbe gilt auch für Regionen, Staaten und Nationen wie Österreich und Tschechien. Denn das heutige Europa schafft mit gegenseitigem Kennenlernen und Verständnis die Erhaltung von Vielfalt und Einzigartigkeit gleichermaßen. So gesehen erscheint die hier besprochene Analyse des Narrativs österreichisch-tschechischer Beziehungen zur rechten Zeit. Lucie Antošíková und Karl Brousek haben für die MEDIENIMPULSE zwischen tschechien und Österreich rezensiert …
description: Medienimpulse, Bd. 58 Nr. 02 (2020): Nähe(n) und Distanz(en) in Zeiten der COVID-19-Krise
O'ZBEKISTON RESPUBLIKASIDA INKLYUZIV TA'LIMNING ME'YORIY-HUQUQIY BAZASI VA RIVOJLANISH ISTIQBOLLARI
Creators: name: Nuriddinova, Nozima
name: Norboboyeva, Dinora
Publisher: name: Zenodo
Year: 2025

description: Mazkur maqolada O‘zbekiston Respublikasida inklyuziv ta'limning rivojlanishiga xizmat qiluvchi me’yoriy-huquqiy hujjatlar tahlil qilinadi. Inklyuziv ta'limning ahamiyati va uning qonuniy asoslari, shuningdek, bu tizimni amalga oshirishda davlatning roli va xalqaro majburiyatlari ko‘rib chiqiladi. O‘zbekiston Respublikasining Konstitutsiyasi, Ta'lim to‘g‘risidagi qonun, Maxsus ta'lim to‘g‘risidagi qonun, va boshqa muhim me’yoriy hujjatlar inklyuziv ta'limni rivojlantirishning huquqiy asoslarini tashkil etadi. Maqolada shuningdek, inklyuziv ta'limga oid amaliy islohotlar va bu tizimni amalga oshirishdagi mavjud muammolar va ularning yechimlari haqida ham so‘z boradi. Yozma ishda inklyuziv ta'limni rivojlantirish uchun zarur bo‘lgan huquqiy normativ hujjatlar, xalqaro me'yorlar va O‘zbekistonning ta'lim sohasidagi yutuqlari haqida batafsil ma'lumotlar taqdim etiladi.
Central Dynamics of Multi-mass Rotating Star Clusters
Creators: name: Tiongco, Maria
name: Collier, Angela
name: Varri, Anna Lisa
Publisher: name: arXiv
Year: 2021
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We investigate the evolutionary nexus between the morphology and internal kinematics of the central regions of collisional, rotating, multi-mass stellar systems, with special attention to the spatial characterisation of the process of mass segregation. We report results from idealized, purely $N$-body simulations that show multi-mass, rotating, and spherical systems rapidly form an oblate, spheroidal massive core, unlike single-mass rotating or multi-mass non-rotating configurations with otherwise identical initial properties, indicating that this evolution is a result of the interplay between the presence of a mass spectrum and angular momentum. This feature appears to be long-lasting, preserving itself for several relaxation times. The degree of flattening experienced by the systems is directly proportional to the initial degree of internal rotation. In addition, this morphological effect has a clear characterisation in terms of orbital architecture, as it lowers the inclination of the orbits of massive stars. We offer an idealised dynamical interpretation that could explain the mechanism underpinning this effect and we highlight possible useful implications, from kinematic hysteresis to spatial distribution of dark remnants in dense stellar systems.
description: 13 pages, 12 figures, Accepted for publication in MNRAS
A Kinetic Flux Difference Splitting Method for Compressible Flows
Creators: name: S, Shrinath. K.
name: H, Maruthi. N.
name: Rao, S. V. Raghurama
name: Rao, Veeredhi Vasudeva
Publisher: name: arXiv
Year: 2021
Subjects: subject: Fluid Dynamics (physics.flu-dyn)
subject: Computational Physics (physics.comp-ph)
subject: FOS: Physical sciences

description: A low diffusive flux difference splitting based kinetic scheme is developed based on a discrete velocity Boltzmann equation, with a novel three velocity model. While two discrete velocities are used for upwinding, the third discrete velocity is utilized to introduce appropriate additional numerical diffusion only in the expansion regions, identified using relative entropy (Kullback-Liebler divergence) at the cell-interface, along with the estimation of physical entropy. This strategy provides an interesting alternative to entropy fix, which is typically needed for low diffusive schemes. Grid-aligned steady discontinuities are captured exactly by fixing the primary numerical diffusion such that flux equivalence leads to zero numerical diffusion across discontinuities. Results for bench-mark test problems are presented for inviscid and viscous compressible flows.
Konzepte medienpädagogischer Kompetenz von Lehramtsstudierenden in deutschsprachigen und internationalen Studien – ein systematisches Literaturreview
Creators: name: Delere, Malte
Publisher: name: Medienimpulse
Year: 2020

description: Zur Förderung der Medienkompetenz von Schüler*innen benötigen Lehrkräfte spezielle Vermittlungskompetenzen. Das systematische Literaturreview untersucht 67 Artikel und Beiträge aus internationaler Forschungsliteratur ab dem Jahr 2000 auf die Konzeptualisierung medienpädagogischer Kompetenz. Es werden theoriegenerierende Beiträge, Darstellungen von Vermittlungskonzepten und empirische Studien untersucht. Die Modelle werden nach Häufigkeit des Auftretens geordnet dargestellt. Es kann herausgearbeitet werden, dass die deutschsprachigen Artikel hauptsächlich mit Konzepten des eigenen Forschungsdiskurses arbeiten, während im internationalen Diskurs das Modell TPACK der Hauptbezugspunkt ist.
description: Medienimpulse, Bd. 58 Nr. 02 (2020): Nähe(n) und Distanz(en) in Zeiten der COVID-19-Krise
Effects of different geometries on the conductance, shot noise and tunnel magnetoresistance of double quantum dots
Creators: name: Weymann, I.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: The spin-polarized transport through a coherent strongly coupled double quantum dot (DQD) system is analyzed theoretically in the sequential and cotunneling regimes. Using the real-time diagrammatic technique, we analyze the current, differential conductance, shot noise and tunnel magnetoresistance (TMR) as a function of both the bias and gate voltages for double quantum dots coupled in series, in parallel as well as for T-shaped systems. For DQDs coupled in series, we find a strong dependence of the TMR on the number of electrons occupying the double dot, and super-Poissonian shot noise in the Coulomb blockade regime. In addition, for asymmetric DQDs, we analyze transport in the Pauli spin blockade regime and explain the existence of the leakage current in terms of cotunneling and spin-flip cotunneling-assisted sequential tunneling. For DQDs coupled in parallel, we show that the transport characteristics in the weak coupling regime are qualitatively similar to those of DQDs coupled in series. On the other hand, in the case of T-shaped quantum dots we predict a large super-Poissonian shot noise and TMR enhanced above the Julliere value due to increased occupation of the decoupled quantum dot. We also discuss the possibility of determining the geometry of the double dot from transport characteristics. Furthermore, where possible, we compare our results with existing experimental data on nonmagnetic systems and find qualitative agreement.
description: 15 pages, 12 figures, accepted in Phys. Rev. B
The Impact of Neutrino Magnetic Moments on the Evolution of Massive Stars
Creators: name: Heger, Alexander
name: Friedland, Alexander
name: Giannotti, Maurizio
name: Cirigliano, Vincenzo
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We explore the sensitivity of massive stars to neutrino magnetic moments. We find that the additional cooling due to the neutrino magnetic moments bring about qualitative changes to the structure and evolution of stars in the mass window 7 Msun < M < 18 Msun, rather than simply changing the time scales for the burning. We describe some of the consequences of this modified evolution: the shifts in the threshold masses for creating core-collapse supernovae and oxygen-neon-magnesium white dwarfs and the appearance of a new type of supernova in which a partial carbon-oxygen core explodes within a massive star. The resulting sensitivity to the magnetic moment is at the level of (2-4) * 10^{-11} μ_B.
description: 13 pages, 9 figures; a relevant reference added, typos corrected, results unchanged; submitted to ApJ
Multiwavelength properties of Miras
Creators: name: Iwanek, Patryk
name: Kozłowski, Szymon
name: Gromadzki, Mariusz
name: Soszyński, Igor
name: Wrona, Marcin
name: Skowron, Jan
name: Ratajczak, Milena
name: Udalski, Andrzej
name: Szymański, Michał K.
name: Pietrukowicz, Paweł
name: Ulaczyk, Krzysztof
name: Poleski, Radosław
name: Mróz, Przemysław
name: Skowron, Dorota M.
name: Rybicki, Krzysztof
Publisher: name: arXiv
Year: 2021
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We comprehensively study the variability of Miras in the Large Magellanic Cloud (LMC) by simultaneous analysing light curves in 14 bands in the range of 0.5$-$24 microns. We model over 20-years-long, high cadence $I$-band light curves collected by The Optical Gravitational Lensing Experiment (OGLE) and fit them to light curves collected in the remaining optical/near-infrared/mid-infrared bands to derive both the variability amplitude ratio and phase-lag as a function of wavelength. We show that the variability amplitude ratio declines with the increasing wavelength for both oxygen-rich (O-rich) and carbon-rich (C-rich) Miras, while the variability phase-lag increases slightly with the increasing wavelength. In a significant number of Miras, mostly the C-rich ones, the spectral energy distributions (SEDs) require a presence of a cool component (dust) in order to match the mid-IR data. Based on SED fits for a golden sample of 140 Miras, we calculated synthetic period-luminosity relations (PLRs) in 42 bands for the existing and future sky surveys that include OGLE, The VISTA Near-Infrared $YJK_\mathrm{s}$ Survey of the Magellanic Clouds System (VMC), Legacy Survey of Space and Time (LSST), Gaia, Spitzer, The Wide-field Infrared Survey Explorer (WISE), The James Webb Space Telescope (JWST), The Nancy Grace Roman Space Telescope (formerly WFIRST), and The Hubble Space Telescope (HST). We show that the synthetic PLR slope decreases with increasing wavelength for both the O-rich and C-rich Miras in the range of 0.1$-$40 microns. Finally, we show the location and motions of Miras on the color-magnitude (CMD) and color-color (CCD) diagrams.
description: Accepted for publication in The Astrophysical Journal Supplement Series. 27 pages, 16 figures, 7 tables. The full machine readable tables will be available in the online journal just after publication
Distance Learning in der COVID-19 Krise: Ein Praxischeck
Creators: name: Goetz, Miriam
Publisher: name: Medienimpulse
Year: 2020

description: Der vorliegende Beitrag untersucht die Herausforderungen für deutsche Lehrerinnen und Lehrer, die im Kontext der COVID-19-Pandemie quasi über Nacht den bis dahin primär analogen Präsenzunterricht auf Distance-Learning umheben mussten. Das betraf nicht nur die Vermittlung des Unterricht-Stoffs sondern auch der Beziehung zwischen Lehrkräften und Schülerinnen und Schülern. Geführte Interviews mit deutschen Lehrkräften zeigen, mit welchen zeitlichen, technischen und administrativen Herausforderungen die Lehrerinnen und Lehrer hier konfrontiert wurden und wie sie letztlich das Distance-Learning umsetzten. Dabei soll konkret aufgezeigt werden, welche Faktoren eine Umsetzung des digitalen Unterrichts begünstigten oder erschwerten. Die Perspektive der Schülereltern wird ergänzend ebenfalls mit ins Feld geführt. Damit entsteht ein direkter Einblick in die pädagogische Praxis deutscher Lehrkräfte zum Ausbruch und Peak der Corona-Pandemie, der Aufschluss gibt welche Parameter bei einem künftigen Ausbau des Distance-Learning verbessert und besonders berücksichtigt werden müssen.
description: Medienimpulse, Bd. 58 Nr. 02 (2020): Nähe(n) und Distanz(en) in Zeiten der COVID-19-Krise
„Ich bin keine Pausenaufsicht, ich bin kein Retter … ich bin Lehrer.“
Creators: name: Reischl, Julia
name: Schmölz, Alexander
Publisher: name: Medienimpulse
Year: 2020

description: Lehrerinnen und Lehrer kamen aufgrund der durch die COVID-19-Krise bedingte Ausnahmesituation und der Umstellung auf “home schooling” nicht nur hinsichtlich des bereits etablierten alltäglichen Unterrichtspraxis, sondern auch bezüglich ihrer hierin eingenommenen Rolle mit gewichtigen Ungewissheiten sowie zahlreichen neuen Anforderungen und Herausforderungen konfrontiert. Einerseits wurden in einem sehr knapp bemessenen Zeitraum sämtliche – dem regulären Unterricht inhärente – Regeln, Routinen und Rituale bzw. das dem gewohnten Unterrichtssetting zugrundeliegende Handlungsprogramm vollkommen außer Kraft gesetzt (vgl. Thiel 2016, S. 109f). Dies führte andererseits wiederum dazu, dass gewisse Verpflichtungen der bzw. die Erwartungen an die Lehrpersonen neu definiert bzw. ausgehandelt wurden. Der Aufsatz thematisiert folglich die Rolle als durch die Institution Schule induzierte Zumutung der Gesellschaft in Zeiten der COVID-19-Krise und deren Einfluss auf die digitalisierte Handlungspraxis von Lehrende im Kontext des von der Regierung verordneten home schoolings.
description: Medienimpulse, Bd. 58 Nr. 02 (2020): Nähe(n) und Distanz(en) in Zeiten der COVID-19-Krise
Formation epochs, star formation histories and sizes of massive early-type galaxies in cluster and field environments at z=1.2: insights from the rest-frame UV
Creators: name: Rettura, A.
name: Rosati, P.
name: Nonino, M.
name: Fosbury, R. A. E.
name: Gobat, R.
name: Menci, N.
name: Strazzullo, V.
name: Mei, S.
name: Demarco, R.
name: Ford, H. C.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We derive stellar masses, ages and star formation histories of massive early-type galaxies in the z=1.237 RDCS1252.9-2927 cluster and compare them with those measured in a similarly mass-selected sample of field contemporaries drawn from the GOODS South Field. Robust estimates of these parameters are obtained by comparing a large grid of composite stellar population models with 8-9 band photometry in the rest-frame NUV, optical and IR, thus sampling the entire relevant domain of emission of the different stellar populations. Additionally, we present new, deep $U$-band photometry of both fields, giving access to the critical FUV rest-frame, in order to constrain empirically the dependence on the environment of the most recent star formation processes. We find that early-type galaxies, both in the cluster and in the field, show analogous optical morphologies, follow comparable mass vs. size relation, have congruent average surface stellar mass densities and lie on the same Kormendy relation. We also that a fraction of early-type galaxies in the field employ longer timescales, $τ$, to assemble their mass than their cluster contemporaries. Hence we conclude that, while the formation epoch of early-type only depends on their mass, the environment does regulate the timescales of their star formation histories. Our deep $U$-band imaging strongly supports this conclusions. It shows that cluster galaxies are at least 0.5 mag fainter than their field contemporaries of similar mass and optical-to-infrared colors, implying that the last episode of star formation must have happened more recently in the field than in the cluster.
description: 20pages, 10 figures. to appear on ApJ
NMR study of AgInTe$_2$ at normal and high pressure
Creators: name: Guehne, Robin
name: Kattinger, Carsten
name: Bertmer, Marko
name: Welzmiller, Simon
name: Oeckler, Oliver
name: Haase, Jürgen
Publisher: name: arXiv
Year: 2022
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: The ternary semiconductor AgInTe$_2$ is a thermoelectric material with chalcopyrite-type structure that transforms reversibly into a rocksalt-type structure under high pressure. Nuclear magnetic resonance (NMR) is considered to provide unique insight into material properties on interatomic length scales, especially in the context of structural phase transitions. Here, $^{115}$In and $^{125}$Te NMR is used to study AgInTe$_2$ for ambient conditions and pressures up to 5 GPa. Magnetic field dependent and magic angle spinning (MAS) experiments of $^{125}$Te prove strongly enhanced internuclear couplings, as well as a distribution of isotropic chemical shifts suggesting a certain degree of cation disorder. The indirect nuclear coupling is smaller for $^{115}$In, as well as the chemical shift distribution in agreement with the crystal structure. The $^{115}$In NMR is further governed by a small quadrupolar interaction ($ν_\mathrm{Q} \approx$ 90 kHz) and shows an orders of magnitude faster nuclear relaxation in comparison to that of $^{125}$Te. At a pressure of about 3 GPa, the $^{115}$In quadrupole interaction increases sharply to about 2400 kHz, indicating a phase transition to a structure with a well defined, though non-cubic local symmetry, while the $^{115}$In shift suggests no significant changes of the electronic structure. The NMR signal is lost above about 5 GPa (at least up to about 10 GPa). However, upon releasing the pressure a signal is recovered that points to the reported metastable ambient pressure phase with a high degree of disorder.
description: Main manuscript 13 pages (references not counted), 5 figures, including Supplementary Information of 4 pages (references not counted), 3 figures; submitted to The Journal of Physical Chemistry C
Lernen trotz Corona. Chancen und Herausforderungen des distance learning an österreichischen Schulen
Creators: name: Tengler, Karin
name: Schrammel, Natalie
name: Brandhofer, Gerhard
Publisher: name: Medienimpulse
Year: 2020

description: Ein aktuell laufendes Forschungsprojekt der Pädagogischen Hochschule Niederösterreich widmet sich der Frage, wie Eltern, Lehrkräfte und die Schulleitung die Phase des Distance Learnings erlebt haben und welche Schlussfolgerungen daraus für den regulären Unterricht gezogen werden können. Nach einer Beschreibung der Ausgangssituation und der Darstellung anderer, ähnlicher Studien sollen in diesem Artikel erste Ergebnisse dieses Forschungsprojekts präsentiert werden.
description: Medienimpulse, Bd. 58 Nr. 02 (2020): Nähe(n) und Distanz(en) in Zeiten der COVID-19-Krise
An empirical study of judgments on internal control
Creators: name: Cook, Shane Padriac
Publisher: name: University of British Columbia
Year: 2010

description: A review of the literature in the area of audit judgment and cognitive style research forms the basis for the research study reported in this paper. Thirty-six independent auditors were required to complete a psychological test structured to measure cognitive complexity. They were also asked to judge weakness of internal control in a hypothetical company as a function of five yes/no questions representing partial judgments according to a full fractional factorial design. The analysis-of-variance version of the Brunswik lens model was used to analyze the subject responses. The results of the experiment indicated that the subjects' models of judgment is highly likely to stem from the fact that most of the subjects were concrete (cognitive simple) in their judgments. The usefulness of fractional factorial studies in human judgment research was also appraised, and it was found to be adequate in the experiment performed. Suggestions for further research applying the cue utilization methodology in audit and management information systems research were made. In addition, suggestions for a more naturalistic approach to audit research were proposed.
Narrative und Medienkompetenzen für Nachhaltigkeitsziele
Creators: name: Klein, Thomas
Publisher: name: Medienimpulse
Year: 2020

description: Die Covid-19-Krise ist Fluch und Segen zugleich. Wir müssen uns einschränken, lernen dabei aber auch sehr viel. Dieses Lernen ist informell, weil es im Alltag oder bei der Arbeit stattfindet. Es ist ratsam, sich nicht nur in Krisensituationen Kompetenzen anzueignen. Dies gilt nicht zuletzt für Zukunftsfähigkeit. Das Partnernetzwerk Medien im Nationalen Aktionsplan Bildung für nachhaltige Entwicklung der Deutschen UNESCO-Kommission setzt sich seit mehreren Jahren mit Gestaltungs- und Medienkompetenz für eine nachhaltige Zukunft auseinander. Zentrale Arbeitsgebiete sind Narrative, Storytelling und Digitalisierung für eine Umsetzung der Nachhaltigkeitsziele der Vereinten Nationen (Sustainable Development Goals).
description: Medienimpulse, Bd. 58 Nr. 02 (2020): Nähe(n) und Distanz(en) in Zeiten der COVID-19-Krise
Politische Bildung unter Bedingungen sozialer Distanz in der Corona-Krise: Lerngelegenheit, Herausforderung und neue Formate
Creators: name: Wohnig, Alexander
name: Heil, Matthias
Publisher: name: Medienimpulse
Year: 2020

description: Die Corona-Krise erzeugt bei Lernenden und Lehrenden sowie für ganze Professionen Lernnotwendigkeiten und -gelegenheiten. Gerade für die Politische Bildung ergeben sich dabei Chancen für subjekt- und konfliktorientierte Bildung. Gleichzeitig gilt es unter den Bedingungen der sozialen Distanz zu reflektieren, wie Bildung stattfinden kann. Dabei ist zu hinterfragen, inwiefern die neuen Lerngelegenheiten und -notwendigkeiten auch auf Visionen verweisen, die im Bildungsfeld angesteuert werden können. Der Beitrag beschreibt zunächst aus Sicht politischer Bildung die Corona-Krise als Lerngelegenheit. Anschließend wird der Einfluss der Krise auf das Bildungsfeld problematisiert. Dabei geht es um die Lernenden, die Lehrenden und die Pädagog*innen sowie die Strukturen, in denen die Akteur*innen agieren. Die Notwendigkeit, unter Bedingungen sozialer Distanz Bildungsprozesse zu initiieren, wird kritisch hinsichtlich der Möglichkeiten ihrer Verwirklichung reflektiert. Abschließend wird mit einem Schwerpunkt auf außerschulische Bildung danach gefragt, wie politische Bildung unter den Bedingungen sozialer Distanz gestaltet werden kann und wo sich Grenzen der Übertragbarkeit von Bildungssettings und -methoden in den digitalen Raum ergeben.
description: Medienimpulse, Bd. 58 Nr. 02 (2020): Nähe(n) und Distanz(en) in Zeiten der COVID-19-Krise
Colorful quantum black holes at the LHC
Creators: name: Calmet, Xavier
name: Gong, Wei
name: Hsu, Stephen D. H.
Publisher: name: arXiv
Year: 2008
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Experiment (hep-ex)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We examine the LHC phenomenology of quantum black holes in models of TeV gravity. By quantum black holes we mean black holes of the smallest masses and entropies, far from the semiclassical regime. These black holes are formed and decay over short distances, and typically carry SU(3) color charges inherited from their parton progenitors. Based on a few minimal assumptions, such as gauge invariance, we identify interesting signatures for quantum black hole decay such as 2 jets, jet + hard photon, jet + missing energy and jet + charged lepton, which should be readily visible above background. The detailed phenomenology depends heavily on whether one requires a Lorentz invariant, low-energy effective field theory description of black hole processes.
description: 10 pages, to appear in Physics Letters B
Distance Learning während der Corona-Krise an Österreichs Volksschulen
Creators: name: Kämpf, Patrick
name: Winetzhammer, Anna
Publisher: name: Medienimpulse
Year: 2020

description: Die Corona-Krise traf Europa unvorbereitet und mit voller Wucht – nachhaltige Veränderungen in so gut wie allen Lebensbereichen waren die Folge. Auch das Bildungssystem blieb von Einschnitten nicht verschont und Schule musste zwangsläufig in den Notbetrieb übergehen. Lernen und Schule fanden dadurch erstmals im Zuhause der Kinder statt. Unter diesen neuen Voraussetzungen stellt sich die grundlegende Frage, unter welchen Bedingungen Lernprozesse in dieser besonderen Zeiten stattfinden und auf welche (digitalen) Medien Lehrpersonen zurückgreifen, um ihren Unterricht aus der Ferne aus zu gestalten. Die Inhalte dieses Beitrags beruhen auf den vorläufigen Forschungsergebnissen zweier separater Masterarbeiten zur selben Thematik und wurden in einer Forschungskooperation zusammengetragen.
description: Medienimpulse, Bd. 58 Nr. 02 (2020): Nähe(n) und Distanz(en) in Zeiten der COVID-19-Krise
Katedra Ginekologii i Położnictwa na Wydziale Lekarskim Uniwersytetu Stefana Batorego w Wilnie w latach Drugiej Rzeczypospolitej
Creators: name: Kądziela, Piotr
Publisher: name: Wydawnictwo Uniwersytetu Jana Kochanowskiego w Kielcach
Year: 2021

description: The paper presents the interwar Chair of Gynecology and Obstetrics at the Faculty of Medicine of the Stefan Batory University in Vilnius. The Chair was consecutively held by two professors: Tadeusz Burdziński and Władysław Jakowicki. The former, prematurely deceased, devoted the short period of his work in Vilnius to organization of lectures and the obstetrics and gynecology university clinical unit. The latter, victim of the 1939 Soviet invasion of Poland, expanded the unit and led a well-organized team of productive researchers. The clinical unit was a desirable institution, as evidenced by the constantly growing number of patients. For a long time significant housing difficulties limited its full potential, which had an impact on the quality of teaching. Despite the limitations, the quality of the medical services provided did not differ from the European standards of the time.
description: Artykuł jest analizą funkcjonowania międzywojennej Katedry Ginekologii i Położnictwa Wydziału Lekarskiego Uniwersytetu Stefana Batorego w Wilnie. Katedrę prowadzili kolejno dwaj profesorowie: Tadeusz Burdziński i Władysław Jakowicki. Pierwszy, przedwcześnie zmarły, krótki okres swojej pracy w Wilnie poświęcił organizacji wykładów i kliniki położniczo-ginekologicznej. Drugi, ofiara sowieckiej inwazji na Polskę w 1939 r., rozbudował klinikę i rozwinął jej działalność, gromadząc wokół siebie dobrze zorganizowany zespół lekarzy-naukowców. Klinika była instytucją potrzebną, o czym świadczyła stale rosnąca liczba pacjentek. Przez długi czas istotne trudności lokalowe ograniczały wykorzystanie jej potencjału, co nie pozostawało bez wpływu na jakość strony dydaktycznej. Mimo tych ograniczeń jakość świadczonych usług medycznych nie odbiegała od ówczesnych standardów europejskich.
CMB Lensing and the WMAP Cold Spot
Creators: name: Das, Sudeep
name: Spergel, David N.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Cosmologists have suggested a number of intriguing hypotheses for the origin of the "WMAP cold spot", the coldest extended region seen in the CMB sky, including a very large void and a collapsing texture. Either hypothesis predicts a distinctive CMB lensing signal. We show that the upcoming generation of high resolution CMB experiments such as ACT and SPT should be able to detect the signatures of either textures or large voids. If either signal is detected, it would have profound implications for cosmology.
description: 5 pages, 2 figures, a bug in Fig.2 fixed
New Giant Planet beyond the Snow Line for an Extended MOA Exoplanet Microlens Sample
Creators: name: Ranc, Clément
name: Bennett, David P.
name: Barry, Richard K.
name: Koshimoto, Naoki
name: Skowron, Jan
name: Hirao, Yuki
name: Bond, Ian A.
name: Sumi, Takahiro
name: Bathe-Peters, Lars
name: Abe, Fumio
name: Bhattacharya, Aparna
name: Donachie, Martin
name: Fujii, Hirosane
name: Fukui, Akihiko
name: Silva, Stela Ishitani
name: Itow, Yoshitaka
name: Kirikawa, Rintaro
name: Kondo, Iona
name: Li, Man Cheung Alex
name: Matsubara, Yutaka
name: Muraki, Yasushi
name: Miyazaki, Shota
name: Olmschenk, Greg
name: Rattenbury, Nicholas J.
name: Satoh, Yuki
name: Shoji, Hikaru
name: Suzuki, Daisuke
name: Tanaka, Yuzuru
name: Tristram, Paul J.
name: Yamawaki, Tsubasa
name: Yonehara, Atsunori
Publisher: name: arXiv
Year: 2021
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: Characterizing a planet detected by microlensing is hard if the planetary signal is weak or the lens-source relative trajectory is far from caustics. However, statistical analyses of planet demography must include those planets to accurately determine occurrence rates. As part of a systematic modeling effort in the context of a $>10$-year retrospective analysis of MOA's survey observations to build an extended MOA statistical sample, we analyze the light curve of the planetary microlensing event MOA-2014-BLG-472. This event provides weak constraints on the physical parameters of the lens, as a result of a planetary anomaly occurring at low magnification in the light curve. We use a Bayesian analysis to estimate the properties of the planet, based on a refined Galactic model and the assumption that all Milky Way's stars have an equal planet-hosting probability. We find that a lens consisting of a $1.9^{+2.2}_{-1.2}\,\mathrm{M}_\mathrm{J}$ giant planet orbiting a $0.31^{+0.36}_{-0.19}\,\mathrm{M}_\odot$ host at a projected separation of $0.75\pm0.24\,\mathrm{au}$ is consistent with the observations and is most likely, based on the Galactic priors. The lens most probably lies in the Galactic bulge, at $7.2^{+0.6}_{-1.7}\mathrm{kpc}$ from Earth. The accurate measurement of the measured planet-to-host star mass ratio will be included in the next statistical analysis of cold planet demography detected by microlensing.
description: accepted for publication in the Monthly Notices of the Royal Astronomical Society, 19 pages, 7 figures, 2 tables
On the number and sums of eigenvalues of Schrödinger-type operators with degenerate kinetic energy
Creators: name: Cuenin, Jean-Claude
name: Merz, Konstantin
Publisher: name: arXiv
Year: 2022
Subjects: subject: Mathematical Physics (math-ph)
subject: Spectral Theory (math.SP)
subject: FOS: Physical sciences
subject: FOS: Mathematics

description: We estimate sums of functions of negative eigenvalues of Schrödinger-type operators whose kinetic energy vanishes on a codimension one submanifold. Our main technical tool is the Stein-Tomas theorem and some of its generalizations.
description: References updated; Improved Lieb-Thirring and Cwikel-Lieb-Rosenbljum inequalities (Corollary 3.3 and Theorems 3.4 and 3.8) and alternative proof for Theorem 3.4
Micro-scale investigations of temperature-dependent Microbial-Induced Carbonate Precipitation (MICP) in the temperature range 4-50 °C
Creators: name: Wang, Yuze
name: Wang, Yong
name: Soga, Kenichi
name: DeJong, Jason T.
name: Kabla, Alexandre J.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Geophysics (physics.geo-ph)
subject: FOS: Physical sciences

description: Microbially-Induced Carbonate Precipitation (MICP) involves a series of bio-geochemical reactions whereby microbes alter the surrounding aqueous environment and induce calcium carbonate precipitation. MICP has a broad range of applications, including in-situ soil stabilization. However, the reliability of this process is dependent on a number of environmental conditions. In particular, bacterial growth, bacterial activity, and precipitation kinetics all depend on temperature. Batch test and microfluidic chip experiments were performed in this study to investigate the effects of temperature on bacterial density and activity and the MICP processes occurring at different temperatures (4-50°C). Spatial and temporal variations in the formation and development of calcium carbonate precipitates, including their amount, type, growth rate, formation, and deformation characteristics, were monitored. Results show that different types of calcium carbonate precipitates with varying sizes and quantities were produced by varying the temperature. Low temperature (4°C) did not reduce bacterial activity, but limited the final amount of cementation; low temperature reduced bacterial growth and attachment ratio, as well as calcium carbonate precipitation rate. High temperature (50°C) conditions significantly reduced bacterial activity within a short period of time, whilst a repeated injection of bacteria before every two injections of cementation solution increased the final amount of cementation. The findings made from this paper provide insight into how MICP processes vary across a range of temperatures and could be valuable for optimising the MICP process for different applications.
Lernen auf Distanz – Einblicke in den familialen Alltag des Homeschoolings und Formen der Bewältigung
Creators: name: Gerhardts, Lara
name: Kamin, Anna-Maria
name: Meister, Dorothee M.
name: Richter, Lea
name: Teichert, Jeannine
Publisher: name: Medienimpulse
Year: 2020

description: Lernen in Zeiten der Coronavirus-Pandemie erfordert nicht nur von Schulen und Lehrkräften ein Umdenken gewohnter Strukturen. Homeschooling und Distance Learning beschäftigen durch neue Herausforderungen im Alltag die ganze Familie. Nach einer kurzen Einführung in den noch jungen Forschungstand veranschaulichen drei Fallporträts von Schüler*innen der fünften Jahrgangsstufe wie sich der familiale Alltag verändert, wenn Schule plötzlich zu Hause stattfindet. Kinder erwerben in Rekordgeschwindigkeit neue Medien- und Bedienkompetenzen digitaler Technologien, während Eltern Rollenkonflikte bewältigen, die neben dem Vermittlungsprozess zwischen Schule und Kindern durch beratende, begleitende und prüfende Tätigkeiten bei der Bearbeitung von Schulaufgaben entstehen. Im Hinblick auf zukünftige Distance-Learning-Szenarien zeigt sich hier, inwiefern Schule maßgeblich durch digitale Infrastrukturen das gesamte Familiensystem entlasten und Schüler*innen zur selbstständigen Arbeit befähigen kann.
description: Medienimpulse, Bd. 58 Nr. 02 (2020): Nähe(n) und Distanz(en) in Zeiten der COVID-19-Krise
Molecular line search toward the flaring 6.7-GHz methanol masers of G24.33+0.13 and G359.6-0.243: rare maser transitions detected
Creators: name: McCarthy, Tiege
name: Orosz, Gabor
name: Ellingsen, Simon
name: Breen, Shari
name: Voronkov, Maxim
name: Burns, Ross
name: Olech, Mateusz
name: Yonekura, Yoshinori
name: Hirota, Tomoya
name: Hyland, Lucas
name: Wolak, Pawel
Publisher: name: arXiv
Year: 2021
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: We have performed a molecular line search toward the flaring 6.7-GHz masers G24.33+0.13 and G359.62-0.24 using the Australia Telescope Compact Array. We present spectra of the 6.7-GHz class~II methanol and 22.2-GHz water masers toward these sources and provide comparison with other recent flaring events these sources have experienced. We also detect the fourth example of a 23.4-GHz class~I methanol maser, and the eleventh example of a 4.8-GHz formaldehyde maser toward G24.33+0.13. Alongside these results, we observe the previously detected ammonia (3,3) emission and report upper limits on the presence of various other cm-wavelength methanol, ammonia and OH transitions. Our results are consistent with the flaring of G24.33+0.13 being driven by a variable accretion rate in the host high-mass young stellar object.
description: Accepted into MNRAS 2021 October 17. 10 pages, 4 figures and 3 tables
Agricultural Income and Finance Situation and Outlook: 2021 Edition
Creators: name: Dubman, Robert
name: Key, Nigel
name: Law, Jonathan
name: Litkowski, Carrie
name: Mandalay, Okkar
name: Subedi, Dipak
name: Todd, Jessica E
name: Whitt, Christine
name: Dubman, Robert
name: Key, Nigel
name: Law, Jonathan
name: Litkowski, Carrie
name: Mandalay, Okkar
name: Subedi, Dipak
name: Todd, Jessica E
name: Whitt, Christine
Publisher: name: Unknown
Year: 2021
Subjects: subject: Farm Management
subject: Farm financial performance
subject: farm income
subject: family farms
subject: farm households

description: The agricultural economy experienced pronounced volatility over 2009–19, including strong periods of expansions in the first part of the decade followed by several years of contraction. This report presents and assesses recent trends in three major areas of farm finance: farm income, Government payment programs, and Chapter 12 bankruptcy eligibility and rates.
Obraz zarazy w polskim folklorze
Creators: name: Marczewska, Marzena
Publisher: name: Wydawnictwo Uniwersytetu Jana Kochanowskiego w Kielcach
Year: 2021

description: W artykule przedstawiam wybrane aspekty językowego ludowego obrazu zarazy. Analizę buduję na podstawie różnorodnego materiału językowego (od danych systemowych po tekstowe). Koncentruję się głównie na nazwach i ich etymologii, wyobrażeniach zarazy i środkach ochrony przed chorobami epidemicznymi. W języku zachowało się nie tylko określone myślenie o chorobach pandemicznych (np. wyobrażenia o zarazie jako kobiecie), lecz także określone sposoby radzenia sobie z chorobami, które przychodzą nagle i niszczą życie danej społeczności.
description: In this paper I present selected aspects of the linguistic folk image of the plague. I build my analysis on the basis of a variety of linguistic material (from the system data to the text data). I concentrate mainly on the names of the plague and their etymology, images of the plague and the protection measures against infectious diseases. Not only does the language retain specific thinking about pandemic diseases (e.g. ideas about the plague as a woman), but also it records some specific ways of dealing with such a disease that comes suddenly and destroys community life.