cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Route towards complete 3D hydro-chemical simulations of companion-perturbed AGB outflows
Creators: name: Maes, Silke
name: Siess, Lionel
name: Homan, Ward
name: Malfait, Jolien
name: De Ceuster, Frederik
name: Ceulemans, Thomas
name: Donne, Dion
name: Esseldeurs, Mats
name: Decin, Leen
Publisher: name: arXiv
Year: 2022
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: Low- and intermediate mass stars experience a significant mass loss during the last phases of their evolution, which obscures them in a vast, dusty envelope. Although it has long been thought this envelope is generally spherically symmetric in shape, recent high-resolution observations find that most of these stars exhibit complex and asymmetrical morphologies, most likely resulting from binary interaction. In order to improve our understanding about these systems, theoretical studies are needed in the form of numerical simulations. Currently, a handful of simulations exist, albeit they mainly focus on the hydrodynamics of the outflow. Hence, we here present the pathway to more detailed and accurate modelling of companion-perturbed outflows with Phantom, by discussing the missing but crucial physical and chemical processes. With these state-of-the-art simulations we aim to make a direct comparison with observations to unveil the true identity on the embedded systems.
The formation of lunar mascon basins from impact to contemporary form
Creators: name: Freed, Andrew M.
name: Johnson, Brandon C.
name: Blair, David M.
name: Melosh, H. J.
name: Neumann, Gregory A.
name: Phillips, Roger J.
name: Solomon, Sean C.
name: Wieczorek, Mark A.
name: Zuber, Maria T.
Publisher: name: Columbia University
Year: 2014
Subjects: Lunar geology
Lunar basins
Gravity
Gravity anomalies

description: Positive free‐air gravity anomalies associated with large lunar impact basins represent a superisostatic mass concentration or “mascon.” High‐resolution lunar gravity data from the Gravity Recovery and Interior Laboratory spacecraft reveal that these mascons are part of a bulls‐eye pattern in which the central positive anomaly is surrounded by an annulus of negative anomalies, which in turn is surrounded by an outer annulus of positive anomalies. To understand the origin of this gravity pattern, we modeled numerically the entire evolution of basin formation from impact to contemporary form. With a hydrocode, we simulated impact excavation and collapse and show that during the major basin‐forming era, the preimpact crust and mantle were sufficiently weak to enable a crustal cap to flow back over and cover the mantle exposed by the impact within hours. With hydrocode results as initial conditions, we simulated subsequent cooling and viscoelastic relaxation of topography using a finite element model, focusing on the mare‐free Freundlich‐Sharonov and mare‐infilled Humorum basins. By constraining these models with measured free‐air and Bouguer gravity anomalies as well as surface topography, we show that lunar basins evolve by isostatic adjustment from an initially subisostatic state following the collapse stage. The key to the development of a superisostatic inner basin center is its mechanical coupling to the outer basin that rises in response to subisostatic stresses, enabling the inner basin to rise above isostatic equilibrium. Our calculations relate basin size to impactor diameter and velocity, and they constrain the preimpact lunar thermal structure, crustal thickness, viscoelastic rheology, and, for the Humorum basin, the thickness of its postimpact mare fill.
Remarks on the limiting behaviors of generalized elephant random walks
Creators: name: Shiozawa, Yuichi
Publisher: name: arXiv
Year: 2022
Subjects: subject: Probability (math.PR)
subject: FOS: Mathematics

description: We study the limiting behaviors of a generalized elephant random walk on the integer lattice. This random walk is defined by using two sequences of parameters expressing the memory at each step from the whole past and the drift of each step to the right, respectively. This model is also regarded as a dependent Bernoulli process. Our results reveal how the scaling factors are determined by the behaviors of the parameters. In particular, we allow the degeneracy of the parameters. We further present several examples in which the scaling factors are explicitly computed.
description: Figure display corrected
First order global asymptotics for confined particles with singular pair repulsion
Creators: name: Chafaï, Djalil
name: Gozlan, Nathael
name: Zitt, Pierre-André
Publisher: name: arXiv
Year: 2013
Subjects: subject: Probability (math.PR)
subject: Mathematical Physics (math-ph)
subject: Classical Analysis and ODEs (math.CA)
subject: FOS: Mathematics
subject: FOS: Physical sciences

description: We study a physical system of $N$ interacting particles in $\mathbb{R}^d$, $d\geq1$, subject to pair repulsion and confined by an external field. We establish a large deviations principle for their empirical distribution as $N$ tends to infinity. In the case of Riesz interaction, including Coulomb interaction in arbitrary dimension $d>2$, the rate function is strictly convex and admits a unique minimum, the equilibrium measure, characterized via its potential. It follows that almost surely, the empirical distribution of the particles tends to this equilibrium measure as $N$ tends to infinity. In the more specific case of Coulomb interaction in dimension $d>2$, and when the external field is a convex or increasing function of the radius, then the equilibrium measure is supported in a ring. With a quadratic external field, the equilibrium measure is uniform on a ball.
description: Published version. IMS-AAP-AAP980
[Gymnasium 108, 2001, H. 1 / Hermes 129, 2001, H.1 / Philologus 144, 2000, H. 2 …]
Creators: name: Mensching, Eckart
Publisher: name: Forum Classicum
Year: 2017

description: -
description: Forum Classicum, Nr. 2 (2001): Forum Classicum
Crafting a Sustainable Reproducibility Service and Archive
Creators: name: Kellam, Lynda
name: Block, Bill
name: Kowalski, Brandon
Publisher: name: Zenodo
Year: 2021

description: The Cornell Institute for Social and Economic Research (CISER) has been actively building a Results Reproduction (R-Squared) service since 2013. To date, CISER's R-Squared team has recruited researchers from various social-science related disciplines, including fields such as Policy Analysis, Communications, and Industrial and Labor Relations. Many of these researchers are members of teams working on larger interdisciplinary research projects, such as Global Health, Nutrition, and Engineering. Altogether we have created more than 40 packages of reproduction-ready material. Ensuring that these packages are available for the long-term requires crafting a sustainable service, workflow, and archive. In this paper, we will first overview the larger discussion around reproducibility and transparency work. Next we will relate that discussion to archives and libraries and needs for long-term access to reproducibility materials, a newer area in library discussions. Next, we will highlight the major challenges with developing workflows between our R-Squared service and our in-house, long-standing archive. These include both daily workflow challenges as well as unanticipated issues, such as how to handle secondary data used in original research that is licensed other data providers. Finally, we will present our approach to redesigning our in-house data archive to better highlight our R-Squared packages and their materials. In our paper we will discuss our plans and specifications for the archive, and at the conference we will demonstrate its capabilities with our live launch.
Improving Generalizability of Graph Anomaly Detection Models via Data Augmentation
Creators: name: Zhou, Shuang
name: Huang, Xiao
name: Liu, Ninghao
name: Zhou, Huachi
name: Chung, Fu-Lai
name: Huang, Long-Kai
Publisher: name: arXiv
Year: 2023
Subjects: subject: Machine Learning (cs.LG)
subject: Artificial Intelligence (cs.AI)
subject: FOS: Computer and information sciences

description: Graph anomaly detection (GAD) is a vital task since even a few anomalies can pose huge threats to benign users. Recent semi-supervised GAD methods, which can effectively leverage the available labels as prior knowledge, have achieved superior performances than unsupervised methods. In practice, people usually need to identify anomalies on new (sub)graphs to secure their business, but they may lack labels to train an effective detection model. One natural idea is to directly adopt a trained GAD model to the new (sub)graph for testing. However, we find that existing semi-supervised GAD methods suffer from poor generalization issue, i.e., well-trained models could not perform well on an unseen area (i.e., not accessible in training) of the same graph. It may cause great troubles. In this paper, we base on the phenomenon and propose a general and novel research problem of generalized graph anomaly detection that aims to effectively identify anomalies on both the training-domain graph and unseen testing graph to eliminate potential dangers. Nevertheless, it is a challenging task since only limited labels are available, and the normal background may differ between training and testing data. Accordingly, we propose a data augmentation method named \textit{AugAN} (\uline{Aug}mentation for \uline{A}nomaly and \uline{N}ormal distributions) to enrich training data and boost the generalizability of GAD models. Experiments verify the effectiveness of our method in improving model generalizability.
description: Accepted to IEEE Transactions on Knowledge and Data Engineering (TKDE). arXiv admin note: substantial text overlap with arXiv:2209.10168
HARBIY TAʼLIM MUASSASALARIDA PEDAGOGIK MENEJMENT  SAMARADORLIGINI OSHIRISH
Creators: name: Ilmiy markaz boshligʻi oʻrinbosari Urakov Shuhrat Erkinovich Erkin tadqiqotchi Mannabov Abduxamid Abdimajitovich
Publisher: name: Zenodo
Year: 2023

description: Maqolada O'zbekiston Respublikasi Harbiy ta'lim muassasasini rivojlantirishda yangi va ilgʻor  pedagogik menejment  samaradorligini oshirish va ushbu jarayonni samarali tashkil etilishida bir nechta muhim omillar qay darajada ahamiyat kasb etishi va istiqboldagi samarali jihatlar haqida ilmiy fikr va mulohazalar yoritilgan.
Kalit soʻzlar: Harbiy taʼlim, Qurolli Kuchlar, pedagogika, menejment, menejer, Xavfsizlik, psixologiya, Akkreditatsiya, qonun, akademiya.
Аннотация: В статье расскрыто повышение эффективности нового и передового педагогического управления в развитии военного образовательного учреждения Республики Узбекистан, и в эффективной организации этого процесса, выделены степень важности нескольких важных факторов, а также научные мнения и соображения об эффективных аспектах перспективы.
Ключевые слова: Военное образование, Вооруженные Силы, педагогика, менеджмент, менеджер, Безопасность, психология, Аккредитация, право, научные круги.
Lepton mass matrix from double covering of $A_4$ modular flavor symmetry
Creators: name: Okada, Hiroshi
name: Orikasa, Yuta
Publisher: name: arXiv
Year: 2022
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We study a double covering of modular $A_4$ flavor symmetry in which we construct lepton models in cases of canonical seesaw and radiative seesaw models. Through $χ$ square numerical analysis, we show some predictions for the cases, depending on normal and inverted hierarchies.
description: 18 pages, 3 figures
Kosaki-Longo index and classification of charges in 2D quantum spin models
Creators: name: Naaijkens, Pieter
Publisher: name: arXiv
Year: 2013
Subjects: subject: Mathematical Physics (math-ph)
subject: Operator Algebras (math.OA)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences
subject: FOS: Mathematics
subject: 81R15 (Primary) 46L37, 81T05 (Secondary)

description: We consider charge superselection sectors of two-dimensional quantum spin models corresponding to cone localisable charges, and prove that the number of equivalence classes of such charges is bounded by the Kosaki-Longo index of an inclusion of certain observable algebras. To demonstrate the power of this result we apply the theory to the toric code on a 2D infinite lattice. For this model we can compute the index of this inclusion, and conclude that there are four distinct irreducible charges in this model, in accordance with the analysis of the toric code model on compact surfaces. We also give a sufficient criterion for the non-degeneracy of the charge sectors, in the sense that Verlinde's matrix S is invertible.
description: 23 pages, 2 figures. v2: closed gap in proof of Lemma 4.7, some minor corrections
title: Επανάχρηση υποστέγων της Πολεμικής Αεροπορίας στην περιοχή του πρώην αεροδρομίου στο Ελληνικό, ως  Σχολή Αεροναυπηγών και Μουσείο.
title: Restoration of Military Airforce’s hangars, on Hellinikon, the region of the ex airport of Athens as a School of Aeronautics and a Museum
Creators: name: Καπατσωρη Μαρια-Τινα
Publisher: name: Technical University of Crete
Year: 2019

description: Η παρούσα διπλωματική εργασία αφορά τον χώρο του πρώην Αεροδρομίου Αττικής, του Ελληνικού, και πιο συγκεκριμένα την περιοχή Χασάνι. Η εργασία πραγματεύεται την διατήρηση 3 υπαρχόντων υποστέγων (Hangars) της Πολεμικής Αεροπορίας στην παραπάνω περιοχή που στην περίοδο λειτουργίας του Αεροδρομίου χρησιμοποιούνταν ως χώροι σταύθμευσης και συντήρησης αεροσκαφών. Σήμερα τα κτίρια αυτά δεν έχουν καμία χρήση, μετά τη μεταφορά του αεροδρομίου, και δεν έχουν μελετηθεί στα προτεινόμενα σχέδια ανάπλασης.
Η πρόταση βασίζεται στην αξιολόγηση διατήρησης των υποστέγων διότι αποτελούν ειδικές κατασκευές ιδιαίτερης στατικής σημασίας με ιδιαίτερα βιομηχανικά και τεχνικά χαρακτηριστικά και είναι σημαντικά για τη μελέτη της ιστορίας της βιομηχανικής αρχιτεκτονικής στην Ελλάδα. (ΦΕΚ 2009). Προτείνεται λοιπόν, η επανάχρησή τους ως Σχολή Αεροναυπηγών, Μουσείο Ιστορίας της περιοχής του Ελληνικού ως πρώην αεροδρόμιο και Μουσείο αεροσκαφών της Πολεμικής Αεροπορίας, δεδομένου ότι και στο προτεινόμενο σχέδιο ανάπλασης η περιοχή Χασάνι προβλέπεται ως χώρος εκπαίδευσης, έρευνας και επιχειρηματικότητας. Η πρόταση έχει ως άξονες αφενός την επανάχρηση των υποστέγων με σεβασμό στην διατήρηση του σκελετού των υπάρχοντων κτισμάτων και αφετέρου στην επαναδιαμόρφωση των όψεων και κατόψεων.
Στόχος είναι η σύνδεση των υποστέγων μεταξύ τους και με τον αστικό ιστό, με την δημιουργία προσβάσεων στο χώρο μελέτης, πράσινων χώρων και χώρων εκτόνωσης, εγκαταστάσεις υπαίθριων δραστηριοτήτων για την αξιοποίηση του περιβάλλοντα χώρου και μιας υπέργειας διαδρομής, καθώς και «περιπλανήσεις» για πεζό και ποδηλάτη. Το ενδιαφέρον ωστόσο επικεντρώνεται στο 2ο υπόστεγο όπου φιλοξενεί τόσο τη Σχολή Αεροναυπηγών όσο και πιο δημόσιες χρήσεις όπως Βιβλιοθήκη, Εστιατόριο – Καφέ και Αμφιθέατρο.
Quark unitarity triangles
Creators: name: Wysozka, S. Rebeca Juárez
name: Kielanowski, Piotr
name: Mercado, Liliana Vazquez
Publisher: name: arXiv
Year: 2022
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: The angles of all unitarity triangles of the Cabibbo-Kobayashi-Maskawa matrix are determined from the experimental data. Our analysis is independent of the parameterization of the CKM matrix and it is based on the predictions of the unitarity for the angles and the areas of the unitarity triangles. We note that the lengths of the sides of the four unitarity triangles determined from the experimental data do not form a triangle. We resolve this incompatibility by performing a constrained fit, assuming the equality of the area of the unitarity triangles. We demonstrate that the measured data are compatible with the predictions of the unitarity of the Cabibbo-Kobayashi-Maskawa matrix, but there is a $2σ$ tension for one of the triangles. We show that the angles of the unitarity triangles obtained by the multiplication of the rows of the CKM matrix can be obtained from the angles obtained by the multiplication of the columns. The equality of those two types of the angles is a simple, but a very powerful test of the general structure of the Standard Model.
Junkelmann, Marcus: Das Spiel mit dem Tod. So kämpften Roms Gladiatoren
Creators: name: Lobe, Michael
Publisher: name: Forum Classicum
Year: 2017

description: Rezension zu: Junkelmann, Marcus: Das Spiel mit dem Tod. So kämpften Roms Gladiatoren. Mainz: von Zabern 2000. 196 S. (ISBN 3-8053- 2563-0).
description: Forum Classicum, Nr. 2 (2001): Forum Classicum
Duden. Deutsches Universalwörterbuch. 4., neub. und erw. Aufl.
Creators: name: Werner, Jürgen
Publisher: name: Forum Classicum
Year: 2017

description: Rezension zu: Duden. Deutsches Universalwörterbuch. 4., neub. und erw. Aufl. Mannheim usw. (Duden- verlag) 2001. 1892 S. (ISBN 3-411- 05504-9).
description: Forum Classicum, Nr. 2 (2001): Forum Classicum
Koppleman and Rubin
Creators: name: (:Unav)
Publisher: name: Columbia University
Year: 2019

description: Loudon Wainwright and Geroge Gerdes (both actors from "Jacknife" directed by David Jones) live in the studio sing "Peas Porridge Hot", "Dead Skunk in the Middle of the Road", "The Great Dichotomy", satirical version of Neil Young's "Heart of Gold", "Say that You Love Me", "I Am the Way", "Weed Room Blues", "Surfing Queen", "Will You Love Me When I'm Dead", "Red Guitar", "Life is Like a Mountain Railway", "Son of Obituary", cover "Soldier's Last Letter" by Ernest Tubb, cover"Coming Home to You" by Jack O'Harris, cover "You Ain't Goin' Nowhere" by Bob Dylan, "Everybody I Know Want's to Look Pretty
Total Domishold Graphs: a Generalization of Threshold Graphs, with Connections to Threshold Hypergraphs
Creators: name: Chiarelli, Nina
name: Milanic, Martin
Publisher: name: arXiv
Year: 2013
Subjects: subject: Combinatorics (math.CO)
subject: Discrete Mathematics (cs.DM)
subject: FOS: Mathematics
subject: FOS: Computer and information sciences
subject: 05C69

description: A total dominating set in a graph is a set of vertices such that every vertex of the graph has a neighbor in the set. We introduce and study graphs that admit non-negative real weights associated to their vertices such that a set of vertices is a total dominating set if and only if the sum of the corresponding weights exceeds a certain threshold. We show that these graphs, which we call total domishold graphs, form a non-hereditary class of graphs properly containing the classes of threshold graphs and the complements of domishold graphs, and are closely related to threshold Boolean functions and threshold hypergraphs. We present a polynomial time recognition algorithm of total domishold graphs, and characterize graphs in which the above property holds in a hereditary sense. Our characterization is obtained by studying a new family of hypergraphs, defined similarly as the Sperner hypergraphs, which may be of independent interest.
description: 19 pages, 1 figure
Canfora, Luciano: Caesar. Der demokratische Diktator. Eine Biographie
Creators: name: Elvers, Karl-Ludwig
Publisher: name: Forum Classicum
Year: 2017

description: Rezension zu: Canfora, Luciano: Caesar. Der demokratische Diktator. Eine Biographie. München: Beck 2001. 491 S. (ISBN 3-406-46640-0).
description: Forum Classicum, Nr. 3 (2001): Forum Classicum
Confinement of the Solar Tachocline by Dynamo Action in the Radiative Interior
Creators: name: Matilsky, Loren I.
name: Hindman, Bradley W.
name: Featherstone, Nicholas A.
name: Blume, Catherine C.
name: Toomre, Juri
Publisher: name: arXiv
Year: 2022
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: A major outstanding problem in solar physics is the confinement of the solar tachocline, the thin shear layer that separates nearly solid-body rotation in the radiative interior from strong differential rotation in the convection zone. Here, we present the first 3-D, global solar simulation in which a tachocline is confined by a self-excited dynamo. The non-axisymmetric magnetism is initially built in the convection zone and then diffusively imprints downward. Additionally, the field is locally amplified throughout the radiative interior by vigorous horizontal motions that arise from equatorial Rossby waves and possibly shear instabilities. Our work thus challenges the long-held notion that the Sun's dynamo magnetic field is amplified only as deep as the tachocline and stored in a quiescent radiative interior.
description: 13 pages, 5 figures, 1 table, 2 appendices, accepted for publication in ApJL
Detection of Fake Users in SMPs Using NLP and Graph Embeddings
Creators: name: Chakraborty, Manojit
name: Das, Shubham
name: Mamidi, Radhika
Publisher: name: arXiv
Year: 2021
Subjects: subject: Machine Learning (cs.LG)
subject: FOS: Computer and information sciences

description: Social Media Platforms (SMPs) like Facebook, Twitter, Instagram etc. have large user base all around the world that generates huge amount of data every second. This includes a lot of posts by fake and spam users, typically used by many organisations around the globe to have competitive edge over others. In this work, we aim at detecting such user accounts in Twitter using a novel approach. We show how to distinguish between Genuine and Spam accounts in Twitter using a combination of Graph Representation Learning and Natural Language Processing techniques.
description: 5 pages, 3 figures
Quantum transport of strongly interacting fermions in one dimension at far-out-of-equilibrium
Creators: name: Zou, Jie
name: Li, Xiaopeng
Publisher: name: arXiv
Year: 2022
Subjects: subject: Quantum Gases (cond-mat.quant-gas)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: In the study of quantum transport, much has been known for dynamics near thermal equilibrium. However, quantum transport far away from equilibrium is much less well understood--the linear response approximation does not hold for physics far-out-of-equilibrium in general. In this work, motivated by recent cold atom experiments on probing quantum many-body dynamics of a one-dimensional XXZ spin chain, we study the strong interaction limit of the one-dimensional spinless fermion model, which is dual to the XXZ spin chain. We develop a highly efficient computation algorithm for simulating the non-equilibrium dynamics of this system exactly, and examine the non-equilibrium dynamics starting from a density modulation quantum state. We find ballistic transport in this strongly correlated setting, and show a plane-wave description emerges at long-time evolution. We also observe sharp distinction between transport velocities in short and long times as induced by interaction effects, and provide a quantitative interpretation for the long-time transport velocity.
Single-photon quadratic optomechanics
Creators: name: Liao, Jie-Qiao
name: Nori, Franco
Publisher: name: arXiv
Year: 2013
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We present exact analytical solutions to study the coherent interaction between a single photon and the mechanical motion of a membrane in quadratic optomechanics. We consider single-photon emission and scattering when the photon is initially inside the cavity and in the fields outside the cavity, respectively. Using our solutions, we calculate the single-photon emission and scattering spectra, and find relations between the spectral features and the system's inherent parameters, such as: the optomechanical coupling strength, the mechanical frequency, and the cavity-field decay rate. In particular, we clarify the conditions for the phonon sidebands to be visible. We also study the photon-phonon entanglement for the long-time emission and scattering states. The linear entropy is employed to characterize this entanglement by treating it as a bipartite one between a single mode of phonons and a single photon.
description: 10 pages, 7 figures
Eigenvalue spectra and stability of directed complex networks
Creators: name: Baron, Joseph W.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: FOS: Physical sciences

description: Quantifying the eigenvalue spectra of large random matrices allows one to understand the factors that contribute to the stability of dynamical systems with many interacting components. This work explores the effect that the interaction network between components has on the eigenvalue spectrum. We build upon previous results, which usually only take into account the mean degree of the network, by allowing for non-trivial network degree heterogeneity. We derive closed-form expressions for the eigenvalue spectrum of the adjacency matrix of a general weighted and directed network. Using these results, which are valid for any large well-connected complex network, we then derive compact formulae for the corrections (due to non-zero network heterogeneity) to well-known results in random matrix theory. Specifically, we derive modified versions of the Wigner semi-circle law, the Girko circle law and the elliptic law and any outlier eigenvalues. We also derive a surprisingly neat analytical expression for the eigenvalue density of an directed Barabasi-Albert network. We are thus able to make general deductions about the effect of network heterogeneity on the stability of complex dynamic systems.
description: 11 pages, 7 figures
Detecting Cosmic Strings with Lensed Fast Radio Bursts
Creators: name: Xiao, Huangyu
name: Dai, Liang
name: McQuinn, Matthew
Publisher: name: arXiv
Year: 2022
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: Correlated red noise recently reported from pulsar timing observations may be an indication of stochastic gravitational waves emitted by cosmic strings that formed during a primordial phase transition near the Grand Unification energy scale. Unfortunately, known probes of cosmic strings, namely the Cosmic Microwave Background anisotropies and string lensing of extragalactic galaxies, are not sensitive enough for low string tensions of $Gμ= 10^{-10}-10^{-7}$ that are needed to explain this putative signal. We show that strong gravitational lensing of Fast Radio Bursts (FRBs) by cosmic strings is a potentially unambiguous avenue to probe that range of string tension values. The image pair of string lensing are expected to have identical magnification factor and parity, and have a typical time delay of $\sim 10^2\,\,(G\,μ/10^{-8})^2$ seconds. The unique spectral fingerprint of each FRB, as well as the possibility to detect correlations in the time series of the electric field of the radio waves, will enable verification of the string lensing interpretation. Very-Long-Baseline Interferometry (VLBI) observations can spatially resolve the image pair and provide a lower bound on the string tension based on the image separation. We calculate the FRB lensing rate as a function of FRB detection number for several different models of the FRB redshift distribution. We find that a survey detecting $\sim 10^5$ FRBs, in line with estimates for the detection rate of the forthcoming survey CHORD, can uncover a strong lensing event for a string tension of $Gμ\simeq 10^{-7}$. Larger FRB surveys, such as Phase 2 of the Square Kilometre Array (SKA), have the potential to significantly improve the sensitivity on the string tension to $Gμ\simeq 10^{-9}$.
description: 11 pages, 5 figures
Schumacher, Leonhard: Sklaverei in der Antike. Alltag und Schicksal der Unfreien
Creators: name: Elvers, Karl-Ludwig
Publisher: name: Forum Classicum
Year: 2017

description: Rezension zu: Schumacher, Leonhard: Sklaverei in der Antike. Alltag und Schicksal der Unfreien. München: Beck 2001. 368 S., 146 Abb. (ISBN 3-406-46574-9).
description: Forum Classicum, Nr. 3 (2001): Forum Classicum
Comparing the light curves of simulated Type Ia Supernovae with observations using data-driven models
Creators: name: Diemer, Benedikt
name: Kessler, Richard
name: Graziani, Carlo
name: Jordan, George C.
name: Lamb, Donald Q.
name: Long, Min
name: van Rossum, Daniel R.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: We propose a robust, quantitative method to compare the synthetic light curves of a Type Ia Supernova (SNIa) explosion model with a large set of observed SNeIa, and derive a figure of merit for the explosion model's agreement with observations. The synthetic light curves are fit with the data-driven model SALT2 which returns values for stretch, color, and magnitude at peak brightness, as well as a goodness-of-fit parameter. Each fit is performed multiple times with different choices of filter bands and epoch range in order to quantify the systematic uncertainty on the fitted parameters. We use a parametric population model for the distribution of observed SNIa parameters from large surveys, and extend it to represent red, dim, and bright outliers found in a low-redshift SNIa data set. We discuss the potential uncertainties of this population model and find it to be reliable given the current uncertainties on cosmological parameters. Using our population model, we assign each set of fitted parameters a likelihood of being observed in nature, and a figure of merit based on this likelihood. We define a second figure of merit based on the quality of the light curve fit, and combine the two measures into an overall figure of merit for each explosion model. We compute figures of merit for a variety of 1D, 2D and 3D explosion models and show that our evaluation method allows meaningful inferences across a wide range of light curve quality and fitted parameters.
description: Published version, minor changes
The DDI4 Core - how to document data from different structures?
Creators: name: Orten, Hilde
name: Hoyle, Larry
Publisher: name: Zenodo
Year: 2021

description: The DDI4 Core - how to document data from different structures? The model based DDI4 Core specification to be released in 2020 offers new possibilities to describe data compared to earlier versions of the DDI. The DDI4 Core has a domain independent approach to data description,aiming at covering data from different structures as well as new data types. The presentation will provide examples on and discuss how data from the following structures can be described using this new product of the DDI Alliance: • Wide Data - traditional rectangular unit record data sets. • Long Data - used for many different data types, for example event data and spell data. • Multi-Dimensional Data - some examples are multi-dimensional cubes and time series. • Key-Value Data - suitable to structure data from lakes, streams, big data etc.
Solving Tolman-Oppenheimer-Volkoff equations in $f(T)$ gravity: a novel approach applied to polytropic equations of state
Creators: name: de Araujo, J. C. N.
name: Fortes, H. G. M.
Publisher: name: arXiv
Year: 2021
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: The Teleparallel Theory is an alternative theory of gravity equivalent to General Relativity (GR) and with non-vanishing torsion $T$. Some extensions of this theory, the so-called $f(T)$ models, have been subject of many recent works. The purpose of our work in the end is to consider recent results for a specific family of $f(T)$ models by using their corresponding Tolman-Oppenheimer-Volkof to describe compact objects such as neutron stars. By performing numerical calculations, it is possible to find, among other things, the maximum mass allowed by the model for a neutron star for a given equation of state (EOS), which would also allow us to evaluate which models are in accordance with observations. To begin with, the present work, the second in the series, considers polytropic EOSs since they can offer a simpler and satisfactory description for the compact objects. In addition, with these EOSs, we can already assess how different the $f(T)$ theories are in relation to GR with respect to the stellar structure. The results already known to GR must be reproduced to some extent and, eventually, we can find models that allow higher maximum masses than Relativity itself, which could explain, for example, the secondary component of the event GW190814. This particular issue will be subject of a forthcoming paper, the third in the series, where realistic EOSs are considered.
Isospin-symmetry implications for nuclear two-body distributions and short-range correlations
Creators: name: Weiss, R.
name: Lovato, A.
name: Wiringa, R. B.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Nuclear Theory (nucl-th)
subject: Nuclear Experiment (nucl-ex)
subject: FOS: Physical sciences

description: We study the implications of isospin symmetry in nuclear systems on two-body distributions and derive relations between different densities or momentum distributions of a given nucleus or of different nuclei in the same isospin multiplet. A connection between neutrinoless double beta decay transition of mirror nuclei and two-body densities is also obtained. The relations are numerically verified by means of quantum Monte Carlo calculations. We discuss the relevance of these results to the analysis of nuclear short-range correlations and also show that isospin symmetry allows us to extract information about the spectator nucleons when a short-range correlated pair is formed.
Conformal restriction: the radial case
Creators: name: Wu, Hao
Publisher: name: arXiv
Year: 2013
Subjects: subject: Probability (math.PR)
subject: FOS: Mathematics

description: We describe all random sets that satisfy the radial conformal restriction property, therefore providing the analogue in the radial case of results of Lawler, Schramm and Werner in the chordal case.
description: Accepted for publication by Stochastic Processes and their Applications
Stefan Kipf, Altsprachlicher Unterricht in der Bundesrepublik Deutschland. Historische Entwicklung, didaktische Konzepte und methodische Grundfragen von der Nachkriegszeit bis zum Ende des 20. Jahrhunderts
Creators: name: Schmitz, Dietmar
Publisher: name: Forum Classicum
Year: 2017

description: Rezension zu: Stefan Kipf, Altsprachlicher Unterricht in der Bundesrepublik Deutschland. Historische Entwicklung, didaktische Konzepte und methodische Grundfragen von der Nachkriegszeit bis zum Ende des 20. Jahrhunderts. Bamberg (C.C. Buchner) 2006, 512 S. (ISBN978-3-7661-5678-5)
description: Forum Classicum, Nr. 1 (2007): Forum Classicum
Bernd Schümann: Lernwortschatz zu Cicero
Creators: name: Weitz, Friedemann
Publisher: name: Forum Classicum
Year: 2017

description: Rezension zu: Bernd Schümann: Lernwortschatz zu Cicero. Hamburg: Bernd Schümann Verlag 2006. 56 S. (ISBN 3-9800120-8-5).
description: Forum Classicum, Nr. 1 (2007): Forum Classicum
What's new, CoreTrustSeal? Changes and expected developments 2020-2022
Creators: name: Recker, Jonas
name: Kleemola, Mari
name: L'Hours, Hervé
Publisher: name: Zenodo
Year: 2021

description: CoreTrustSeal is an international, community-based non-profit organisation promoting sustainable and trustworthy data infrastructures and offering a core level trust certification for data repositories. Between March and November 2019, a review of the CoreTrustSeal Requirements and (Extended) Guidance took place which resulted in the publication of the 2020-2022 version of the Requirements and Guidance. The presentation will give an overview of the review process and the feedback received from the community during the public consultation phase or as part of applications. It will then describe the most significant changes to the Requirements and Guidance and their rationale. In particular, an effort was made to clarify the requirements through better guidance, to reduce (perceived) overlap between some of the requirements, and to better communicate the role and importance of R0 "Background information" for the evaluation of the other requirements. The presentation will conclude with an outlook on future plans and envisioned developments, in particular in relation to the role of technical infrastructure providers in repository certification and concerning external demands on the CoreTrustSeal that may result, for example, from the development of the European Open Science Cloud and the further clarification of FAIR Data Principles.
Magnetic scattering with spin-momentum locking: Single scatterers and diffraction grating
Creators: name: Wolski, S.
name: Dugaev, V. K.
name: Sherman, E. Ya.
Publisher: name: arXiv
Year: 2023
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: Simultaneous manipulation of charge and spin density distributions in materials is the key element required in spintronics applications. Here we study the formation of coupled spin and charge densities arising in scattering of electrons by domains of local magnetization producing a position-dependent Zeeman field in the presence of the spin-momentum locking typical for topological insulators. Analytically and numerically calculated scattering pattern is determined by the electron energy, domain magnetization, and size. The spin-momentum locking produces strong differences with respect to the spin-diagonal scattering and leads to the scattering asymmetry with nonzero mean scattering angle as determined by only two parameters characterizing the system. To extend the variety of possible patterns, we study scattering by diffraction gratings and propose to design them in modern nanostructures based on topological insulators to produce desired distributions of the charge and spin densities. These results can be useful for engineering of magnetic patterns for electron optics to control coupled charge and spin evolution.
description: 9 page, 5 figures
Riemann zeta zeros and prime number spectra in quantum field theory
Creators: name: Menezes, G.
name: Svaiter, B. F.
name: Svaiter, N. F.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Mathematical Physics (math-ph)
subject: High Energy Physics - Theory (hep-th)
subject: Number Theory (math.NT)
subject: FOS: Physical sciences
subject: FOS: Mathematics

description: The Riemann hypothesis states that all nontrivial zeros of the zeta function lie in the critical line $\Re(s)=1/2$. Hilbert and Pólya suggested that one possible way to prove the Riemann hypothesis is to interpret the nontrivial zeros in the light of spectral theory. Following this approach, we discuss a necessary condition that such a sequence of numbers should obey in order to be associated with the spectrum of a linear differential operator of a system with countably infinite number of degrees of freedom described by quantum field theory. The sequence of nontrivial zeros is zeta regularizable. Then, functional integrals associated with hypothetical systems described by self-adjoint operators whose spectra is given by this sequence can be constructed. However, if one considers the same situation with primes numbers, the associated functional integral cannot be constructed, due to the fact that the sequence of prime numbers is not zeta regularizable. Finally, we extend this result to sequences whose asymptotic distributions are not "far away" from the asymptotic distribution of prime numbers.
description: Revised version, 18 pages
GitTables: A Large-Scale Corpus of Relational Tables
Creators: name: Hulsebos, Madelon
name: Demiralp, Çağatay
name: Groth, Paul
Publisher: name: arXiv
Year: 2021
Subjects: subject: Databases (cs.DB)
subject: Machine Learning (cs.LG)
subject: FOS: Computer and information sciences

description: The success of deep learning has sparked interest in improving relational table tasks, like data preparation and search, with table representation models trained on large table corpora. Existing table corpora primarily contain tables extracted from HTML pages, limiting the capability to represent offline database tables. To train and evaluate high-capacity models for applications beyond the Web, we need resources with tables that resemble relational database tables. Here we introduce GitTables, a corpus of 1M relational tables extracted from GitHub. Our continuing curation aims at growing the corpus to at least 10M tables. Analyses of GitTables show that its structure, content, and topical coverage differ significantly from existing table corpora. We annotate table columns in GitTables with semantic types, hierarchical relations and descriptions from Schema.org and DBpedia. The evaluation of our annotation pipeline on the T2Dv2 benchmark illustrates that our approach provides results on par with human annotations. We present three applications of GitTables, demonstrating its value for learned semantic type detection models, schema completion methods, and benchmarks for table-to-KG matching, data search, and preparation. We make the corpus and code available at https://gittables.github.io.
Computational reproducibility: A simplified framework for data curators
Creators: name: Sawchuk, Sandra
name: Shahira Khair
Publisher: name: Zenodo
Year: 2021

description: Phrases like the 'data deluge' and the 'reproducibility crisis' may serve to further the impression that data curation is hard and that research data management is "basically fighting against chaos" (Briney, 2019). If trying to manage research data is chaotic, then the management of computationally-derived data presents an even bigger challenge due to the multiplicity of operating systems, coding languages, dependencies, and file types. This is exacerbated by the reality that most researchers and librarians are not formally trained as programmers. As data curators and managers, we may need to reconsider if the complete replication of research, especially computational research, is a realistic goal in all instances. Can curated data still be useful if it is only 'a little bit' reproducible or 'just about' reproducible? This purpose of this presentation is to propose an approach of 'just enough' data curation by arguing that partial reproducibility is better than nothing at all (Broman, n.d.). By focusing on incremental progress rather than prescriptive rules, researchers and curators can build their knowledge and skills as the need arises. A computational reproducibility framework, developed for the Canadian Data Curation Forum, will serve as the model for this approach, which combines learning about reproducibility with improving reproducibility. Computational reproducibility leads to better and more transparent research, but fear of a crisis and focus on perfection shouldn't prevent curation that may be 'good enough.' This presentation will discuss concrete and actionable steps to help researchers, data curators, and data managers improve their understanding and practice of computational reproducibility. Briney, K. (2019). Data management is hard and everyone is bad at it. This includes data managers more often that we care to admit. Data management is basically fighting against chaos.https://twitter.com/mykola/status/1198719315589160960 … [Tweet]. Broman, K. (n.d.). Initial steps toward reproducible research. https://kbroman.org/steps2rr/.
Wolfgang Mieder: „Cogito, ergo sum“. Ich denke, also bin ich. Das Descartes-Zitat in Literatur, Medien und Karikaturen
Creators: name: Werner, Jürgen
Publisher: name: Forum Classicum
Year: 2017

description: Rezension zu: Wolfgang Mieder: „Cogito, ergo sum“. Ich denke, also bin ich. Das Descartes-Zitat in Literatur, Medien und Karikaturen. Mit 77 Abb. Wien, (Praesens-Verlag) 2006. (Kulturelle Motivstudien 6). 225 S. (ISBN-10:3-7069-0398-9; ISBN-13:978- 3-7069-0398-1).
description: Forum Classicum, Nr. 1 (2007): Forum Classicum
On the Chow ring of birational irreducible symplectic varieties
Creators: name: Riess, Ulrike
Publisher: name: arXiv
Year: 2013
Subjects: subject: Algebraic Geometry (math.AG)
subject: FOS: Mathematics

description: We show that the graded Chow rings of two birational irreducible symplectic varieties are isomorphic. This lifts a result known for the cohomology algebras to the level of Chow rings, despite the non-injectivity the cycle class map. In the special case of general Mukai flops, we present an alternative approach based on explicit calculations.
description: To appear in Manuscripta Mathematica; New version containing stronger results; Several typos corrected
Probability in many-worlds theories
Creators: name: Short, Anthony J.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We consider how to define a natural probability distribution over worlds within a simple class of deterministic many-worlds theories. This can help us understand the typical properties of worlds within such states, and hence explain the empirical success of quantum theory within a many-worlds framework. We give three reasonable axioms which lead to the Born rule in the case of quantum theory, and also yield natural results in other cases, including a many-worlds variant of classical stochastic dynamics.
description: 10 pages. v3: Published version
Steady‐state field‐aligned currents at Mercury
Creators: name: Anderson, Brian J.
name: Johnson, Catherine L.
name: Korth, Haje
name: Slavin, James A.
name: Winslow, Reka M.
name: Phillips, Roger J.
name: McNutt Jr., Ralph L.
name: Solomon, Sean C.
Publisher: name: Columbia University
Year: 2014
Subjects: Planets--Magnetospheres
Cosmic magnetic fields
Electric conductivity

description: Magnetic field observations acquired in orbit about Mercury by the MESSENGER spacecraft demonstrate the presence in the planet's northern hemisphere of Birkeland currents that flow to low altitudes. Currents of density 10–30 nA/m2 flow downward at dawn and upward at dusk. Total currents are typically 20–40 kA and exceed 200 kA during disturbed conditions. The current density and total current are two orders of magnitude lower than at Earth. An electric potential of ~30 kV from dayside magnetopause magnetic reconnection implies a net electrical conductance of ~1 S. A spherical‐shell conductance model indicates closure of current radially through the low‐conductivity layers near the surface and by lateral flow from dawn to dusk through more conductive material at depth.
Virial clouds to explain rotational asymmetry in galactic halos
Creators: name: Qadir, Asghar
name: Tahir, Noraiz
name: De Paolis, Francesco
name: Nucita, Achille A.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: The rotation of the galactic objects has been seen by asymmetric Doppler shift in the CMB data. Molecular hydrogen clouds at virial temperature may contribute to the galactic halo dark matter and they might be the reason for the observed rotational asymmetry in the galactic halos. We present a method to constrain the parameters of these virial clouds given that they are composed of a single fluid. The method is such that it should be possible to extend it to more than one fluid.
description: 15th Marcel Grossmann Meeting Rome