cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
X-ray and radio observations of central black holes in nearby low-mass early-type galaxies: Preliminary evidence for low Eddington fractions
Creators: name: Urquhart, R.
name: McDermott, L. I.
name: Strader, J.
name: Seth, A. C.
name: Chomiuk, L.
name: Neumayer, N.
name: Nguyen, D. D.
name: Tremou, E.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We present new radio and X-ray observations of two nearby ($< 4$ Mpc) low-mass early-type galaxies with dynamically-confirmed central black holes: NGC 5102 and NGC 205. NGC 5102 shows a weak nuclear X-ray source and has no core radio emission. However, for the first time we demonstrate that it shows luminous extended radio continuum emission in low-resolution, low-frequency ($< 3$ GHz) data, consistent with jet lobes on scales $\gtrsim 100$ pc formed from past accretion and jet activity. By contrast, in new, extremely deep, strictly-simultaneous Very Large Array and Chandra observations, no radio or X-ray emission is detected from the black hole in NGC 205. We consider these measurements and upper limits in the context of the few other low-mass early-type galaxies with dynamically-confirmed black holes, and show that the mean ratio of bolometric to Eddington luminosity in this sample is only $\textrm{log} \, (L_{\rm bol}/L_{\rm Edd}) = -6.57\pm0.50$. These Eddington ratios are lower than typical in a comparison sample of more massive early-type galaxies, though this conclusion is quite tentative due to our small sample of low-mass galaxies and potential biases in the comparison sample. This preliminary result is in mild tension with previous work using less sensitive observations of more distant galaxies, which predict higher X-ray luminosities than we observe for low-mass galaxies. If it is confirmed that central black holes in low-mass galaxies typically have low Eddington ratios, this presents a challenge to measuring the occupation fraction of central black holes with standard optical emission line, X-ray, or radio surveys.
description: 13 pages, 4 figures, 3 tables. Accepted for publication in ApJ
Velocity requirements for causality violation
Creators: name: Modanese, Giovanni
Publisher: name: arXiv
Year: 2013
Subjects: subject: General Physics (physics.gen-ph)
subject: FOS: Physical sciences

description: We re-examine the "Regge-Tolman paradox" with reference to some recent experimental results. It is straightforward to find a formula for the velocity v of the moving system required to produce causality violation. This formula typically yields a velocity very close to the speed of light (for instance, v/c > 0.97 for X-shaped microwaves), which raises some doubts about the real physical observability of the violations. We then compute the velocity requirement introducing a delay between the reception of the primary signal and the emission of the secondary. It turns out that in principle for any delay it is possible to find moving observers able to produce active causal violation. This is mathematically due to the singularity of the Lorentz transformations for beta to 1. For a realistic delay due to the propagation of a luminal precursor, we find that causality violations in the reported experiments are still more unlikely (v/c > 0.989), and even in the hypothesis that the superluminal propagation velocity goes to infinity, the velocity requirement is bounded by v/c > 0.62. We also prove that if two macroscopic bodies exchange energy and momentum through superluminal signals, then the swap of signal source and target is incompatible with the Lorentz transformations; therefore it is not possible to distinguish between source and target, even with reference to a definite reference frame.
description: 15 pages, 6 figures. Submitted for the proceedings of "Unified Field Mechanics: Natural Science Beyond the Veil of Spacetime", 9th Symposium in Honour of J.-P. Vigier, World Scientific, 2015
A new era of intracluster light studies with JWST
Creators: name: Montes, Mireia
name: Trujillo, Ignacio
Publisher: name: arXiv
Year: 2022
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: Still largely unexplored, the diffuse light in cluster of galaxies traces the past and on-going buildup of these massive structures. Here, we present the first comprehensive study of the intracluster light (ICL) of the cluster SMACS-J0723.3-7327 (z=0.39) using the JWST Early Release Observations. These deep and high spatial resolution images allow the study of the ICL with high signal-to-noise ratio up to a radial distance of $\sim400$ kpc, twice as far with respect to previous HST studies of intermediate redshift clusters. This opens up the possibility of exploring the rich mixture of processes that are building the ICL. We find that the inner parts (R$<$100 kpc) are built through a major merger while the outer parts (R$>$ 100 kpc) are mainly produced by the tidal stripping of Milky Way-like satellites. We also found that the slope of the stellar mass density radial profile of the ICL of this cluster ($α_{3D} = -2.47\pm0.13$) follows closely the predicted dark matter halo slope ($α_{3D\mathrm{,DM}} = -2.6$ to $-2$), supporting the idea that both components have a similar shape and thus the potential of using the ICL as a tracer of the dark matter distribution in clusters of galaxies. Future JWST studies of the ICL are set to revolutionise our understanding of cluster formation and will be crucial to improve the gravitational lensing mass maps of these structures and thus to accurately characterise the properties of the first galaxies.
description: Submitted to ApJL. Fig 6 shows the improvement of our data reprocessing. Key results are in Fig. 1 and 3
Coherent photonic crossbar as a universal linear operator
Creators: name: Giamougiannis, George
name: Tsakyridis, Apostolos
name: Ma, Yangjin
name: Totovic, Angelina
name: Lazovsky, David
name: Pleros, Nikos
Publisher: name: arXiv
Year: 2022
Subjects: subject: Emerging Technologies (cs.ET)
subject: FOS: Computer and information sciences

description: Linear optics aim at realizing any real- and/or complex-valued matrix operator via optical elements, addressing a broad field of applications in the areas of quantum photonics, microwave photonics and optical neural networks. The transfer of linear operators into photonic experimental layouts typically relies on Singular Value Decomposition (SVD) techniques combining meshes of cascaded 2x2 Mach Zehnder Interferometers (MZIs), with the main challenges being the precision in the experimental representation of the targeted matrix, referred to as fidelity, and the overall insertion loss. We demonstrate a novel interferometric coherent photonic crossbar architecture (Xbar) that demarcates from state-of-the-art SVD implementations and can realize any linear operator, supporting full restoration of the loss-induced fidelity. Its novel interferometric design allows for the direct mapping of each matrix element to a single, designated Xbar node, bringing down the number of programming steps to only one. We present the theoretical foundations of the Xbar, proving that its insertion losses scale linearly with the node losses as opposed to the exponential scaling witnessed by the SVD counterparts. This leads to a matrix design with significantly lower overall insertion losses compared to SVD-based schemes when utilizing state-of-the-art silicon photonic fabrication metrics, allowing for alternative node technologies with lower energy consumption and higher operational speed credentials to be employed. Finally, we validate that our Xbar architecture is the first linear operator that supports fidelity restoration, outperforming SVD schemes in loss- and phase-error fidelity performance and forming a significantly more robust layout to loss and phase deviations.
Strong Superradiance of Coherently Coupled Magnetic Dipole Emitters Mediated by Whispering Gallery Modes of a Subwavelength All-Dielectric Cavity
Creators: name: Hu, Ma-Long
name: Du, Xiao-Jing
name: Ma, Lin
name: He, Jun
name: Yang, Zhong-Jian
Publisher: name: arXiv
Year: 2022
Subjects: subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: The interaction of magnetic dipole (MD) emitters and common photonic cavities is usually weak, which is partially due to the low magnetic near field enhancements of the cavities. Here, we show that whispering gallery modes (WGMs) of a subwavelength dielectric cavity can not only greatly boost the emission rate of a MD emitter but also bring efficient couplings between coherent MD emitters. In a WGM cavity, the maximal emission rate (γmax) of a single emitter occurs at an antinode of the field pattern. The emission of the MD emitter can also be greatly affected by another coherent one depending on the magnetic field response of the WGM. The maximal contribution can also reach γmax. Notably, the cooperative emission rate of the coherent MD emitters does not decay with distance in the considered range due to the high-quality feature of a WGM. In contrast to the emission, the absorption of an emitter is hardly affected by the coherent couplings between emitters mediated by a WGM. The difference between the performances of emission and absorption is highly related to the excitation behaviors of WGMs. Our results are important for enhanced magnetic light-matter interactions.
description: 26 pages, 6 figures
Central concentration of warm and dense molecular gas in a strongly lensed submillimeter galaxy at z=6
Creators: name: Tsujita, Akiyoshi
name: Tadaki, Ken-ichi
name: Kohno, Kotaro
name: Hatsukade, Bunyo
name: Egusa, Fumi
name: Tamura, Yoichi
name: Nishimura, Yuri
name: Zavala, Jorge A.
name: Saito, Toshiki
name: Umehata, Hideki
name: Lee, Minju M.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We report the detection of the CO(12-11) line emission toward G09-83808 (or H-ATLAS J090045.4+004125), a strongly-lensed submillimeter galaxy at $z = 6.02$, with Atacama Large Millimeter/submillimeter Array observations. Combining previously detected [O III]$\,88\:\mathrm{μm}$, [N II]$\,205\:\mathrm{μm}$, and dust continuum at 0.6$\:$mm and 1.5$\:$mm, we investigate the physical properties of the multi-phase interstellar medium in G09-83808. A source-plane reconstruction reveals that the region of the CO(12-11) emission is compact ($R_\mathrm{e, CO}=0.49^{+0.29}_{-0.19}\,\mathrm{kpc}$) and roughly coincides with that of the dust continuum. Non-local thermodynamic equilibrium radiative transfer modeling of CO spectral-line energy distribution reveals that most of the CO(12-11) emission comes from a warm (kinetic temperature of $T_{\mathrm{kin}}=320\pm170\:$K) and dense ($\log(n_{\mathrm{H2}}/\mathrm{cm^{-3}})=5.4\pm0.6$) gas, indicating that the warm and dense molecular gas is concentrated in the central 0.5-kpc region. The luminosity ratio in G09-83808 is estimated to be $L_\mathrm{CO(12-11)} / L_\mathrm{CO(6-5)}=1.1\pm0.2$. The high ratio is consistent with those in local active galactic nuclei (AGNs) and $6
description: 13 pages, 11 figures, accepted for publication in PASJ
Single crystal synthesis and magnetic properties of a Shastry-Sutherland lattice compound BaNd2ZnS5
Creators: name: Billingsley, Brianna R.
name: Marshall, Madalynn
name: Shu, Zhixue
name: Cao, Huibo
name: Kong, Tai
Publisher: name: arXiv
Year: 2022
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Single crystals of a Shastry-Sutherland magnetic semiconductor, BaNd2ZnS5, were synthesized through a high-temperature solution growth technique. Physical properties were characterized by powder and single crystal x-ray diffraction, temperature- and field-dependent magnetization, and temperature-dependent specific heat measurements. BaNd2ZnS5 orders antiferromagnetically at 2.9 K, with magnetic moments primarily aligned within the ab-plane. Magnetic isothermal measurements show metamagnetic transitions at ~ 15 kOe for the [110] direction and ~ 21 kOe for the [100] direction. Estimated magnetic entropy suggests a double ground state for each Nd ion.
description: 5 figures
Interacting growth processes and invariant percolation
Creators: name: Müller, Sebastian
Publisher: name: arXiv
Year: 2013
Subjects: subject: Probability (math.PR)
subject: FOS: Mathematics

description: The aim of this paper is to underline the relation between reversible growth processes and invariant percolation. We present two models of interacting branching random walks (BRWs), truncated BRWs and competing BRWs, where survival of the growth process can be formulated as the existence of an infinite cluster in an invariant percolation on a tree. Our approach is fairly conceptual and allows generalizations to a wider set of "reversible" growth processes.
description: Published in at http://dx.doi.org/10.1214/13-AAP995 the Annals of Applied Probability (http://www.imstat.org/aap/) by the Institute of Mathematical Statistics (http://www.imstat.org)
title: ToTEM III: The Bank of Canada’s Main DSGE Model for Projection and Policy Analysis
Creators: name: Corrigan, Paul
name: Desgagnes, Hélène
name: Dorich, Jose
name: Lepetyuk, Vadym
name: Miyamoto, Wataru
name: Zhang, Yang
Publisher: name: Bank of Canada
Year: 2021

description: ToTEM III is the most recent generation of the Bank of Canada’s main dynamic stochastic general equilibrium model for projection and policy analysis. The model helps Bank staff tell clear and coherent stories about the Canadian economy’s current state and future evolution.

description: ToTEM III est la toute nouvelle mouture du principal modèle d’équilibre général dynamique et stochastique que la Banque du Canada utilise pour effectuer des projections et des analyses de politiques. Le modèle aide le personnel de la Banque à décrire de manière claire et cohérente l’état actuel de l’économie canadienne et son évolution prévisible.
The RED-100 experiment
Creators: name: Akimov, D. Yu.
name: Alexandrov, I. S.
name: Alyev, R. R.
name: Belov, V. A.
name: Bolozdynya, A. I.
name: Etenko, A. V.
name: Galavanov, A. V.
name: Glagovsky, E. M.
name: Gusakov, Y. V.
name: Khromov, A. V.
name: Kiselev, S. M.
name: Konovalov, A. M.
name: Kornoukhov, V. N.
name: Kovalenko, A. G.
name: Kozlova, E. S.
name: Kumpan, A. V.
name: Lukyashin, A. V.
name: Pinchuk, A. V.
name: Razuvaeva, O. E.
name: Rudik, D. G.
name: Shakirov, A. V.
name: Simakov, G. E.
name: Sosnovtsev, V. V.
name: Vasin, A. A.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Instrumentation and Detectors (physics.ins-det)
subject: FOS: Physical sciences

description: The RED-100 two-phase xenon emission detector has been deployed at 19-m distance from the reactor core of the Kalinin Nuclear Power Plant (KNPP) in 2021 - 2022 for investigation of the possibility to observe reactor antineutrinos using the effect of coherent elastic neutrino-nucleus scattering (CEνNS). The performance of the main systems of the RED-100 setup at operating nuclear power plant is described. There is no correlation of the radioactive background at the experimental setup site with ON and OFF states of the reactor. The data taking run was carried out at the beginning of the year 2022 and covered both the reactor OFF and ON periods.
description: 17 pages, 9 figures, submitted to JINST
Higher Water Loss on Earth-like Exoplanets in Eccentric Orbits
Creators: name: Liu, Binghan
name: Marsh, Dan
name: Walsh, Catherine
name: Cooke, Gregory
Publisher: name: arXiv
Year: 2023
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: FOS: Physical sciences

description: The climate of a terrestrial exoplanet is controlled by the type of host star, the orbital configuration and the characteristics of the atmosphere and the surface. Many rocky exoplanets have higher eccentricities than those in the Solar System, and about 18% of planets with masses $< 10 \mathrm{M}_{\oplus}$ have $e>0.1$. Underexplored are the implications of such high eccentricities on the atmosphere, climate, and potential habitability on such planets. We use WACCM6, a state-of-the-art fully-coupled Earth-system model, to simulate the climates of two Earth-like planets; one in a circular orbit ($e=0$), and one in an eccentric orbit ($e=0.4$) with the same mean insolation. We quantify the effects of eccentricity on the atmospheric water abundance and loss given the importance of liquid water for habitability. The asymmetric temperature response in the eccentric orbit results in a water vapour mixing ratio in the stratosphere ($> 20$ ppmv) that is approximately five times greater than that for circular orbit ($\sim 4$ ppmv). This leads to at most $\sim 3$ times increases in both the atmospheric hydrogen loss rate and the ocean loss rate compared with the circular case. Using the Planetary Spectrum Generator, we simulate the idealised transmission spectra for both cases. We find that the water absorption features are stronger at all wavelengths for the $e=0.4$ spectrum than for the circular case. Hence, highly-eccentric Earth-like exoplanets may be prime targets for future transmission spectroscopy observations to confirm, or otherwise, the presence of atmospheric water vapour.
description: 23 pages, 6 figures, published in MNRAS
title: Οργανική γεωχημική μελέτη νεογενών σχηματισμών της Ζακύνθου
Creators: name: Παπουλας Στυλιανος
Publisher: name: Technical University of Crete
Year: 2016

description: Η παρούσα Διπλωματική Εργασία με τίτλο «Οργανική γεωχημική μελέτη Νεογενών σχηματισμών της Ζακύνθου» έχει ως στόχο την μελέτη του δυναμικού πετρελαιογέ-νεσης της Δυτικής Ελλάδας. Συγκεκριμένα, ερευνάται το δυναμικό των Νεογενών σχηματισμών στην ευρύτερη περιοχή του χωριού Καλαμάκι της Ζακύνθου, το οποίο βρίσκεται κοντά στην ζώνη επώθησης. Χρησιμοποιήθηκαν 18 επιφανειακά δείγματα, τα οποία αναλύθηκαν με πρότυπες μεθόδους οργανικής γεωχημείας.
Ειδικότερα, για τον αρχικό χαρακτηρισμό του οργανικού περιεχομένου των δειγμά-των, χρησιμοποιήθηκε η ανάλυση Rock-Eval. Επιπλέον, το οργανικό υλικό από τα δείγματα των πετρωμάτων εκχυλίστηκε και στην συνέχεια αναλύθηκε με υγρή χρω-ματογραφία ανοικτής στήλης. Το κορεσμένο και το αρωματικό κλάσμα που συλλέ-χθηκε, αναλύθηκε ακολούθως με αέρια χρωματογραφία – φασματοσκοπία μάζας. Ε-πιπρόσθετα, από τα πειραματικά αποτελέσματα υπολογίστηκαν συγκεκριμένοι γεωχη-μικοί δείκτες που στόχο είχαν τον προσδιορισμό της ποιότητας και της ποσότητας της οργανική ύλης, καθώς επίσης, τον προσδιορισμό της προέλευσης και των συνθηκών εναπόθεσής της.
Με βάση τα δεδομένα αυτά και συνεκτιμώντας τις γεωλογικές συνθήκες της περιοχής συνάγεται ότι τα δείγματα των σχηματισμών, περιέχουν οργανική ύλη μικτής προέ-λευσης (χερσαίας και θαλάσσια) η οποία είναι θερμικά ανώριμη.  Η οργανική ύλη των σχηματισμών είναι ικανή για παραγωγή κυρίως μικρών ποσοτήτων αέριων υδρογο-νανθράκων (ξηρό αέριο) και ασήμαντων ποσοτήτων πετρελαίου.
Freund, St. - Vielberg, M. (Hgg.), Vergil und das antike Epos. Festschrift Hans Jürgen Tschiedel
Creators: name: Wissemann, Michael
Publisher: name: Forum Classicum
Year: 2017

description: Rezension zu: Freund, St. - Vielberg, M. (Hgg.), Vergil und das antike Epos. Festschrift Hans Jürgen Tschiedel, Stuttgart 2008 (Franz Steiner Verlag), Altertumswissenschaftliches Kolloquium Bd. 20, (ISBN 978-3-515-09160-2).
description: Forum Classicum, Nr. 4 (2009): Forum Classicum
Consequences of Heavy Quark Symmetries for Hadronic Molecules
Creators: name: Guo, Feng-Kun
name: Hidalgo-Duque, Carlos
name: Nieves, Juan
name: Valderrama, Manuel Pavon
Publisher: name: arXiv
Year: 2013
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: Among the newly observed structures in the heavy quarkonium mass region, some are proposed to be hadronic molecules. We investigate the consequences of heavy quark flavor symmetry on these heavy meson hadronic molecules. The symmetry allows us to predict new hadronic molecules on one hand, and test the hadronic molecular assumption of the observed structures on the other hand. We explore the consequences of the flavor symmetry assuming the X(3872) and $Z_b(10610)$ as a isoscalar $D\bar D^*$ and isovector $B\bar B^*$ hadronic molecule, respectively. A series of hadronic molecules composed of heavy mesons are predicted. In particular, there is an isoscalar $1^{++}$ $B\bar B^*$ bound state with a mass of 10580 MeV which may be searched for in the $Υ(1S,2S)π^+π^-π^0$ mass distribution; the isovector charmonium partners of the $Z_b(10610)$ and the $Z_b(10650)$ are also predicted, one of which probably corresponds to the very recently observed $Z_c(3900)$ and $Z_c(4025)$ resonances by the BESIII Collaboration.
description: 5 pages, 2 tables; the Z_c(4025) has also been included in the discussions; version accepted for publication in PRD
KINDLERS LITERATUR LEXIKON, 3., völlig neub. Aufl, hg. v. Heinz Ludwig Arnold
Creators: name: Werner, Jürgen
Publisher: name: Forum Classicum
Year: 2017

description: Rezension zu: KINDLERS LITERATUR LEXIKON, 3., völlig neub. Aufl, hg. v. Heinz Ludwig Arnold. Stuttgart, Weimar 2009 (J. B. Metzler). Bd. 1: A-Bak[unin]. XIV, 817 S.
description: Forum Classicum, Nr. 4 (2009): Forum Classicum
title: Quality controlled oil reservoirs PVT data
Creators: name: Φιωτοδημητρακη Θεοδοσια
Publisher: name: Technical University of Crete
Year: 2016

description: This thesis focuses on the testing of the quality of the recovered oil samples and the PVT measurements performed in the lab. Firstly, a literature review of the sampling procedures is made, highlighting the problems, advantages, disadvantages and types of fluid that can be sampled each time. Then a quality testing for the samples is accomplished in order to judge the representativity of the oil sample by taking into account the reported sampling conditions and, if separator samples are used, the compatibility of the recombined gas and oil. The best samples undergo PVT tests in order to determine basic thermodynamic properties and composition. Confidence on the validity of the PVT report data is of upmost importance since it is applied to practically all reservoir or production engineering applications. So, a review of the quality check of the PVT experiments is accomplished by utilizing a mass balance method and other thermodynamic graphical techniques. Several tools are employed in Excel for testing the consistency of the reported phase behavior data of PVT study. Oil samples from Tunisia, Congo and unknown locations (fluid 9 and fluid X) are examined for their quality PVT report. It is concluded that the PVT properties of the given PVT analysis report are in most cases and tests well specified.
Consistency and Interpretation of the LHC (Di-)Di-Jet Excesses
Creators: name: Crivellin, Andreas
name: Manzari, Claudio Andrea
name: Mellado, Bruce
name: Dahbi, Salah-Eddine
Publisher: name: arXiv
Year: 2022
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: ATLAS observed a limit for {the cross section of di-jets resonances, which is weaker than expected for a} mass slightly below $\approx$1\TeV. In addition, CMS reported hints for the (non-resonant) pair production of di-jet resonances $X$ via a particle $Y$ at a very similar mass range with a local (global) significance of 3.6\,$σ$ (2.5\,$σ$) at $m_X\approx950\,$GeV. In this article we show that using the preferred range for $m_X$ from the ATLAS analysis, one can reinterpret the CMS analysis of di-di-jets in terms of a resonant search with $Y\to XX$, with a significantly reduced look-elsewhere effect, finding an excess for $m_Y\!\approx\!3.6$\TeV with a significance of $4.0\,σ$ ($3.2\,σ$) locally (globally). We present two possible UV completions capable of explaining the (di-)di-jet excesses, one containing two scalar di-quarks, the other one involving heavy gluons based on an $SU(3)_1\!\times\! SU(3)_2\!\times\! SU(3)_3$ gauge symmetry, spontaneously broken to $SU(3)$ color. In the latter case, non-perturbative couplings are required, pointing towards a composite or extra-dimensional framework. In fact, using 5D-AdS space-time, one obtains the correct mass ratio for $m_X/m_Y$, assuming the $X$ is the lowest lying resonance, and predicts a third (di-)di-jet resonance with a mass around $\approx2.2$\TeV.
description: 9 pages, 4 figures, version accepted for publication in PRD
Brittleness of Bayesian Inference Under Finite Information in a Continuous World
Creators: name: Owhadi, Houman
name: Scovel, Clint
name: Sullivan, Tim
Publisher: name: arXiv
Year: 2013
Subjects: subject: Statistics Theory (math.ST)
subject: Probability (math.PR)
subject: FOS: Mathematics
subject: 62A01, 62E20, 62F12, 62F15, 62G20, 62G35

description: We derive, in the classical framework of Bayesian sensitivity analysis, optimal lower and upper bounds on posterior values obtained from Bayesian models that exactly capture an arbitrarily large number of finite-dimensional marginals of the data-generating distribution and/or that are as close as desired to the data-generating distribution in the Prokhorov or total variation metrics; these bounds show that such models may still make the largest possible prediction error after conditioning on an arbitrarily large number of sample data measured at finite precision. These results are obtained through the development of a reduction calculus for optimization problems over measures on spaces of measures. We use this calculus to investigate the mechanisms that generate brittleness/robustness and, in particular, we observe that learning and robustness are antagonistic properties. It is now well understood that the numerical resolution of PDEs requires the satisfaction of specific stability conditions. Is there a missing stability condition for using Bayesian inference in a continuous world under finite information?
description: 81 pages. To appear in Electronic Journal of Statistics
Sub-aperture SAR Imaging with Uncertainty Quantification
Creators: name: Churchill, Victor
name: Gelb, Anne
Publisher: name: arXiv
Year: 2022
Subjects: subject: Image and Video Processing (eess.IV)
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: In the problem of spotlight mode airborne synthetic aperture radar (SAR) image formation, it is well-known that data collected over a wide azimuthal angle violate the isotropic scattering property typically assumed. Many techniques have been proposed to account for this issue, including both full-aperture and sub-aperture methods based on filtering, regularized least squares, and Bayesian methods. A full-aperture method that uses a hierarchical Bayesian prior to incorporate appropriate speckle modeling and reduction was recently introduced to produce samples of the posterior density rather than a single image estimate. This uncertainty quantification information is more robust as it can generate a variety of statistics for the scene. As proposed, the method was not well-suited for large problems, however, as the sampling was inefficient. Moreover, the method was not explicitly designed to mitigate the effects of the faulty isotropic scattering assumption. In this work we therefore propose a new sub-aperture SAR imaging method that uses a sparse Bayesian learning-type algorithm to more efficiently produce approximate posterior densities for each sub-aperture window. These estimates may be useful in and of themselves, or when of interest, the statistics from these distributions can be combined to form a composite image. Furthermore, unlike the often-employed lp-regularized least squares methods, no user-defined parameters are required. Application-specific adjustments are made to reduce the typically burdensome runtime and storage requirements so that appropriately large images can be generated. Finally, this paper focuses on incorporating these techniques into SAR image formation process. That is, for the problem starting with SAR phase history data, so that no additional processing errors are incurred.
The Process of Deciding About Prophylactic Surgery for Breast and Ovarian Cancer: Patient Questions, Uncertainties, and Communication
Creators: name: Klitzman, Robert L.
name: Chung, Wendy K.
Publisher: name: Columbia University
Year: 2010
Subjects: Breast--Cancer--Surgery--Social aspects
Physician and patient
Communication in medicine
Health--Decision making
Decision making

description: Many, women who have, or are at risk for, BRCA, 1/2 mutations or breast cancer decline prophylactic surgery, but questions remain as to how they make and experience these decisions. Our methods consisted of interviewing 32 women for 2 hr each; 19 were tested, 20 were symptomatic. Our results showed that these surgical options forced women to confront questions, involving stresses and uncertainties, regarding: implications of test results, prognoses with and without surgery, and effects of surgery (e.g., on self‐image). Given these dilemmas, many women turned to doctors who then ranged in what and how they communicated about these issues, and how strongly they offered input. Some patients felt disappointed at provider non‐directiveness, while others found providers too directive. Patients turned to family members and friends, who also ranged in how and what they communicated, and whether they agreed with the patient and/or each other. Many women turned to patient communities, but then had to decide how involved to be, and what information to provide or accept. These data suggest that providers and others may need to be more aware of the series of questions, involving stresses and uncertainties, that these women face, and the complex roles providers themselves may play. These data highlight needs for physicians to be able to address these issues flexibly, gauging patient preferences for information and paternalism (vs. autonomy). These data suggest areas for future research: for example, on how providers decide whether, what and how to communicate about these issues, and how these choices shape treatment decisions.
Wigner Distribution and associated uncertainty principles in the framework of octonion Linear Canonical Transform
Creators: name: Dar, Aamir H.
name: Bhat, M. Younus
Publisher: name: arXiv
Year: 2022
Subjects: subject: Functional Analysis (math.FA)
subject: FOS: Mathematics

description: The most recent generalization of octonion Fourier transform (OFT) is the octonion linear canonical transform (OLCT) that has become popular in present era due to its applications in color image and signal processing. On the other hand the applications of Wigner distribution (WD) in signal and image analysis cannot be excluded. In this paper, we introduce novel integral transform coined as the Wigner distribution in the octonion linear canonical transform domain (WDOL). We first propose the definition of the one dimensional WDOL (1DWDOL), we extend its relationship with 1DOLCT and 1DOFT. Then explore several important properties of 1DWDOL, such as reconstruction formula, Rayleighs theorem. Second, we introduce the definition of three dimensional WDOL (3DWDOL) and establish its relationships with the WD associated with quaternion LCT (WDQLCT) and 3DWD in LCT domain (3DWDLCT). Then we study properties like reconstruction formula, Rayleighs theorem and Riemann Lebesgue Lemma associated with 3DWDOL. The crux of this paper lies in developing well known uncertainty principles (UPs) including Heisenbergs UP, Logarithmic UP and Hausdorff Young inequality associated with WDOL
Nachwehen des Holocaust: 10 Jahre Washingtoner Raubkunst-Richtlinien und Umgang mit Raubkunst in Europa - Tagung am Europa Institut Zürich am 10. Juni 2009
Creators: name: Weller, Matthias
Publisher: name: Kunstrechtsspiegel
Year: 2017

description: -
description: Kunstrechtsspiegel, Nr. 2 (2009): Kunstrechtsspiegel
title: Μελέτη για την ενεργειακή αξιοποίησης κληματιδών μέσω καύσης σε ρευστοποιημένη κλίνη – παραμετρική αξιολόγηση εκπομπών και τεφρών
Creators: name: Τρικουβερτης Γεωργιος-Μαριος
Publisher: name: Technical University of Crete
Year: 2016

description: 	Στην παρούσα μεταπτυχιακή διατριβή πραγματοποιήθηκαν μια σειρά από πειράματα καύσης υπολειμμάτων από τα κλαδοδέματα καλλιέργειας αμπελοειδών σε μια μονάδα ρευστοποιημένης κλίνης (Fluidized Bed Combustion, FBC). Μελετήθηκαν η απόδοση της καύσης και οι εκπομπές των αερίων ρύπων (CO, SO2 και NOX), καθώς επίσης και η σύσταση των τεφρών που παράγονται κάτω από διαφορετικές συνθήκες καύσης.
	Για τα πειράματα, επιλέχθηκαν δύο ανεξάρτητες μεταβλητές: η παροχή καυσίμου τροφοδοσίας και ο λόγος περίσσειας αέρα. Η παροχή καυσίμου ρυθμιζόταν σε 10, 12 ή 14 g/min, ενώ ο λόγος λ της περίσσειας αέρα κυμαινόταν μεταξύ των τιμών 1,3 και 1,7. Για τον υπολογισμό της απόδοσης της καύσης χρησιμοποιήθηκε η μέθοδος της απώλειας θερμότητας .
	Το καύσιμο έχει χαμηλή περιεκτικότητα σε άζωτο και σε θείο, υψηλή περιεκτικότητα σε πτητικά συστατικά και χαμηλή περιεκτικότητα σε τέφρα, γεγονός που το καθιστά καλής ποιότητας.
	Η καύση του δείγματος πραγματοποιήθηκε εντός της κλίνης. Οι εκπομπές CO ήταν χαμηλότερες από τα επιτρεπόμενα όρια, ενώ οι εκπομπές SO2 ήταν αμελητέες. Οι εκπομπές NOX σε ορισμένες περιπτώσεις ήταν υψηλότερες από τα επιτρεπόμενα όρια.
	Οι αναλύσεις έδειξαν ότι οι ιπτάμενες τέφρες των κληματίδων έχουν μεγάλη περιεκτικότητα σε Ca, Si, P, K, Mg και Sr. Η περιεκτικότητα όλων των τεφρών σε τοξικά βαρέα μέταλλα (As, Cd, Hg, Pd) είναι χαμηλή. Σύμφωνα με την ορυκτολογική ανάλυση, τα κύρια ορυκτά που εντοπίστηκαν στις ιπτάμενες τέφρες είναι ο ασβεστίτης και ο φερχιλδίτης.
	Η υψηλότερη απόδοση καύσης παρατηρήθηκε κατά την καύση των κληματίδων για τροφοδοσία καυσίμου F=10g/min και λόγο περίσσειας αέρα λ=1,3. Η αύξηση της περίσσειας αέρα ή η μείωση της τροφοδοσίας του καυσίμου οδήγησε σε μείωση της θερμοκρασίας καύσης και των εκπομπών στη ρευστοποιημένη κλίνη. Η μεταβολή των παραμέτρων αυτών δεν επηρέασε ουσιαστικά τη σύσταση των ιπτάμενων τεφρών.
Balancing conditions in global tropical geometry
Creators: name: Yu, Tony Yue
Publisher: name: arXiv
Year: 2013
Subjects: subject: Algebraic Geometry (math.AG)
subject: FOS: Mathematics
subject: 14T05, 14G22

description: We study tropical geometry in the global setting using Berkovich's deformation retraction. We state and prove the generalized balancing conditions in this setting. Starting with a strictly semi-stable formal scheme, we calculate certain sheaves of vanishing cycles using analytic étale cohomology, then we interpret the tropical weights via these cycles. We obtain the balancing condition for tropical curves on the skeleton associated to the formal scheme in terms of the intersection theory on the special fiber. Our approach works over any complete discrete valuation field.
description: 19 pages. I added an example for a K3 surface, revised the definition of tropical weights, and completed the bibliography
title: Detecting exuberance in house prices across Canadian cities
Creators: name: Emenogu, Ugochi
name: Hommes, Cars
name: Khan, Mikael
Publisher: name: Bank of Canada
Year: 2021

description: We introduce a model to detect periods of extrapolative house price expectations across Canadian cities. The House Price Exuberance Indicator can be updated on a quarterly basis to support the Bank of Canada’s broader assessment of housing market imbalances.

description: Nous présentons un modèle permettant de détecter les périodes d’anticipations extrapolatives relatives aux prix des logements dans des villes canadiennes. L’indicateur de l’exubérance des prix des logements peut être mis à jour trimestriellement pour étayer l’évaluation générale que fait la Banque du Canada des déséquilibres sur le marché du logement.
Production of single-charmed baryons in a quark model approach
Creators: name: Iglesias-Ferrero, Daniel
name: Entem, David R.
name: Fernández, Francisco
name: Ortega, Pablo G.
Publisher: name: arXiv
Year: 2022
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: The production of single-charmed baryons $Λ_c^+ Λ_c^-$, $Λ_c^+ Σ_c^-$+h.c. and $Σ_c^+ Σ_c^-$ in $p\bar p$ collisions is studied in the framework of a constituent quark model which has satisfactorily described the $N\bar N$ system and the strangeness production $p\bar p\to Λ\bar Λ$, $Λ\barΣ$ and $Σ\barΣ$ processes. Predictions on the total cross sections are analyzed for different approaches to the underlying $n\bar n\to c\bar c$ process, mediated by one gluon annihilation diagrams. The results indicate that the cross section is of the order of $1$ nb between $10-14$ GeV for $Λ_c^+Λ_c^-$ and $Λ_c^+ Σ_c^-$ channels, and around $0.01-0.1$ nb for $Σ_c^+Σ_c^-$. This estimations can be relevant for their future search in facilities like $\bar{P}$ANDA.
description: 7 pages, 6 figures
Extended time-dependent generator coordinate method study of induced fission (II): total kinetic energy distribution
Creators: name: Zhao, Jie
name: Nikšić
name: Vretenar, Dario
Publisher: name: arXiv
Year: 2022
Subjects: subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: A model is developed to calculate the total kinetic energy (TKE) distribution of fission fragments in the framework of the time-dependent generator coordinate method (TDGCM), extended to include dissipation effects in the description of induced fission dynamics. Starting from an expression for the dissipative term in the GCM Hamiltonian that determines the time evolution of a statistical collective wave function, derived in the first part of this work, the integrated flux of the probability current through the scission hyper-surface can be computed at different temperatures. The kinetic energy at scission for a specific pair of fragments at a given temperature is determined by the energy balance formula. By folding the kinetic energies of the fragments with the flux of the probability current, the TKE distribution is calculated. The method is illustrated with a calculation of the TKE distribution for induced fission of $^{228}$Th, in the 3D space of collective coordinates: axially-symmetric quadrupole and octupole deformations, and nuclear temperature.
description: 7 pages, 3 figures. arXiv admin note: substantial text overlap with arXiv:2202.13637
Sexual orientation and associated characteristics among north american academic psychiatrists
Creators: name: Klitzman, Robert L.
name: Bodkin, J. Alexander
name: Pope Jr., Harrison G.
Publisher: name: Columbia University
Year: 1998
Subjects: Psychiatrists
Psychiatry
Sexual orientation

description: We mailed questionnaires inquiring about a range of personal and professional attributes to 972 North American psychiatrists at five leading medical schools in the United States and Canada. Of these, 49% (435 psychiatrists) responded. Of the respondents, 90.9% reported being exclusively heterosexual, 3.5% predominantly heterosexual, and 5.6% bisexual/homosexual. Analyses were performed to assess the relationship between sexual orientation and other variables. We found that exclusive heterosexuals were more likely than other psychiatrists to be Jewish (p = .002), to have first‐degree relatives with psychiatric illness (p =.015), and to have conducted research after residency training (p = .034). Exclusively heterosexual psychiatrists were less likely to have used recreational drugs (p = .025), or to prescribe psychotropic medications to none of their patients (p = .017). Sexual orientation was not correlated with a variety of other personal and professional characteristics. The findings suggest that gay men and lesbians are represented within psychiatry at rates comparable to their estimated representation in society. Moreover, the data invite several hypotheses—for example, that medical students may be drawn to psychiatry for specific reasons such as feeling marginalized due to being gay or bisexual.
Deconfinement transition and localization of Dirac modes in finite-temperature $\mathbb{Z}_3$ gauge theory on the lattice
Creators: name: Baranka, György
name: Giordano, Matteo
Publisher: name: arXiv
Year: 2022
Subjects: subject: High Energy Physics - Lattice (hep-lat)
subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: FOS: Physical sciences

description: We study the localization properties of the eigenmodes of the staggered Dirac operator across the deconfinement transition in finite-temperature $\mathbb{Z}_3$ pure gauge theory on the lattice in 2+1 dimensions. This allows for nontrivial tests of the sea-islands picture of localization, according to which low modes should localize on favorable Polyakov-loop fluctuations in the deconfined phase of a gauge theory. We observe localized low modes in the deconfined phase of the theory, both in the real Polyakov-loop sector, where they are expected, and in the complex Polyakov-loop sectors, where they are not. Our findings expose the limitations of the standard sea-islands picture, and call for its refinement. An improved picture, where spatial hopping terms play a more prominent role, is proposed and found to be in excellent agreement with numerical results.
description: 22 pages, 10 figures, revised version, to be published in PRD
Symmetry Breaking in Repeating Fast Radio Bursts
Creators: name: Katz, J. I.
Publisher: name: arXiv
Year: 2022
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: Repeating Fast Radio Bursts show temporal symmetry breaking on millisecond time scales (the "sad trombone"). On a time scale of days the repetitions of FRB 180916B occur at frequency-dependent phases of its 16.3 d period. Some models predict that all such periodic repeating FRB have the same sign of temporal asymmetry, while others predict that sources with both signs are equally abundant. Future observations of other periodically modulated repeating FRB may distinguish among models on this basis.
description: 3 pp Added reference
The 111 and 129 GeV gamma-ray lines from annihilations in the Milky Way dark matter halo, dark disk and subhalos
Creators: name: Cholis, Ilias
name: Santosa, Hani Nurbiantoro
name: Tavakoli, Maryam
name: Ullio, Piero
Publisher: name: arXiv
Year: 2013
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: Recently a series of indications have been put forward suggesting the presence of two gamma-ray lines at 110-130 GeV (centered at 111 and 129 GeV). Signals of these lines have been observed toward the Galactic center, at some galaxy clusters and among some of the unassociated point sources of the 2 years Fermi catalogue. Such a combination of signals could be generated by dark matter annihilations in the main dark matter halo, its substructures and nearby galaxy clusters. We discuss in this work the consistency between the number of events observed at the line energies in the sky and the predictions using results from the Via Lactea II numerical simulation and extrapolations below its mass resolution, taking into account that the annihilation cross-section to the lines can be estimated from the Galactic center signal. We find that some extrapolations to small substructures can naturally account for the point sources signal, although the hypothesis of background only cannot be rejected. We also study the morphology of the gamma-ray sky at the 2 lines energies, testing different Galactic diffuse background models to account for interstellar medium uncertainties, and different assumptions on the DM diffuse component profile. We find from template fits that within reasonable diffuse background uncertainties the presence of a spherical halo component is preferred with cuspier dark matter halo profiles being preferable even from the full sky fit. We finally check the impact of a dark disk component, suggested by cosmological simulations that include baryons and find that thin dark disks can not be disfavored, thus possibly accounting for the preferentially closer to the Galactic disk distribution of the point sources lines signal.
description: 13 pages, 3 figures, 5 tables, changes in v2: in agreement with Astronomical Review published version, some revisions in text and Appendix, added references, otherwise results and conclusions unchanged
Dark matter indirect detection limits from complete annihilation patterns
Creators: name: Armand, Celine
name: Herrmann, Björn
Publisher: name: arXiv
Year: 2022
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: While cosmological and astrophysical probes suggest that dark matter would make up for 85% of the total matter content of the Universe, the determination of its nature remains one of the greatest challenges of fundamental physics. Assuming the $Λ$CDM cosmological model, Weakly Interacting Massive Particles would annihilate into Standard Model particles, yielding $γ$-rays, which could be detected by ground-based telescopes. Dwarf spheroidal galaxies represent promising targets for such indirect searches as they are assumed to be highly dark matter dominated with the absence of astrophysical sources nearby. Previous studies have led to upper limits on the annihilation cross-section assuming single exclusive annihilation channels. In this work, we consider a more realistic situation and take into account the complete annihilation pattern within a given particle physics model. This allows us to study the impact on the derived upper limits on the dark matter annihilation cross-section from a full annihilation pattern compared to the case of a single annihilation channel. We use mockdata for the Cherenkov Telescope Array simulating the observations of the promising dwarf spheroidal galaxy Sculptor. We show the impact of considering the full annihilation pattern within a simple framework where the Standard Model of particle physics is extended by a singlet scalar. Such a model shows new features in the shape of the predicted upper limit which reaches a value of $\langle σv \rangle = 3.8\times10^{-24}~\rm{cm}^{-3}\rm{s}^{-1}$ for a dark matter mass of 1 TeV at 95% confidence level. We suggest to consider the complete particle physics information in order to derive more realistic limits.
description: 21 pages, 9 figures, minor changes, matches published version
Mosimann, Peter/Renold, Marc-Andre/Rascher, Andrea F.G. (Hrsg,): Kultur Kunst Recht [Rez.]
Creators: name: Siehr, Kurt
Publisher: name: Kunstrechtsspiegel
Year: 2017

description: Rezension zu :

Mosimann, Peter/Renold, Marc-Andre/Rascher, Andrea F.G. (Hrsg,): Kultur Kunst Recht, Schweizerisches und internationales Recht. Helbing Lichtenhahn Verlag, Basel 2009, CXXXVII, 1277 S., 21 farbige Abbildungen
description: Kunstrechtsspiegel, Nr. 4 (2009): Kunstrechtsspiegel