cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
INSIGHT-1 at SemEval-2016 Task 4: Convolutional Neural Networks for Sentiment Classification and Quantification
Creators: name: Ruder, Sebastian
name: Ghaffari, Parsa
name: Breslin, John G.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Computation and Language (cs.CL)
subject: Machine Learning (cs.LG)
subject: FOS: Computer and information sciences

description: This paper describes our deep learning-based approach to sentiment analysis in Twitter as part of SemEval-2016 Task 4. We use a convolutional neural network to determine sentiment and participate in all subtasks, i.e. two-point, three-point, and five-point scale sentiment classification and two-point and five-point scale sentiment quantification. We achieve competitive results for two-point scale sentiment classification and quantification, ranking fifth and a close fourth (third and second by alternative metrics) respectively despite using only pre-trained embeddings that contain no sentiment information. We achieve good performance on three-point scale sentiment classification, ranking eighth out of 35, while performing poorly on five-point scale sentiment classification and quantification. An error analysis reveals that this is due to low expressiveness of the model to capture negative sentiment as well as an inability to take into account ordinal information. We propose improvements in order to address these and other issues.
description: Published in Proceedings of SemEval-2016, 5 pages
Nuclear Many-Body Effect on Particle Emissions Following Muon Capture on $^{28}$Si and $^{40}$Ca
Creators: name: Minato, Futoshi
name: Naito, Tomoya
name: Iwamoto, Osamu
Publisher: name: arXiv
Year: 2022
Subjects: subject: Nuclear Theory (nucl-th)
subject: Nuclear Experiment (nucl-ex)
subject: FOS: Physical sciences

description: Muon captures on nuclei have provided us with plenty of knowledge of nuclear properties. Recently, this reaction attracts attention in electronics, because it is argued that charged particle emissions following muon capture on silicon trigger non-negligible soft errors in memory devices. To investigate the particle emissions from a nuclear physics point of view, we develop a new approach using a microscopic model of muon capture and up-to-date particle emission models. We paid attention to the muon capture rates, the particle emission spectra, and the multiplicities that have a close interrelation with each other, and found that the nuclear many-body correlation including two-particle two-hole excitations is a key to explaining them simultaneously.
description: 7 pages, 2 figures, 2 tables
Jan Alexander van Nahl: Kontingenz und Zufall in den altisländischen Königssagas
Creators: name: Gropper, Stefanie
Publisher: name: Das Mittelalter. Perspektiven mediävistischer Forschung
Year: 2023

description: Jan Alexander van Nahl, Kontingenz und Zufall in den altisländischen Königssagas (Ergänzungsbände zum Reallexikon für Germanische Altertumskunde Band 130). Berlin, Boston, De Gruyter 2022. 354 S.
description: Das Mittelalter. Perspektiven mediävistischer Forschung, Bd. 28 Nr. 1 (2023): Die ‚Sieben weisen Meister‘ als globale Erzähltradition/The ‘Seven Sages of Rome’ as a Global Narrative Tradition
Success of the small mass ratio approximation during the final orbits of binary black hole simulations
Creators: name: Albalat, Sergi Navarro
name: Zimmerman, Aaron
name: Giesler, Matthew
name: Scheel, Mark A.
Publisher: name: arXiv
Year: 2022
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: Recent studies have shown the surprising effectiveness of the small mass-ratio approximation (SMR) in modeling the relativistic two-body problem even at comparable masses. Up to now this effectiveness has been demonstrated only during inspiral, before the binary transitions into plunge and merger. Here we examine the binding energy of nonspinning binary black hole simulations with mass ratios from 20:1 to equal mass. We show for the first time that the binaries undergo a transition to plunge as predicted by analytic theory, and estimate the size of the transition region, which is $\sim 10$ gravitational wave cycles for equal mass binaries. By including transition, the SMR expansion of the binding energy is accurate until the last cycle of gravitational wave emission. This is true even for comparable mass binaries such as those observed by current gravitational wave detectors, where the transition often makes up much of the observed signal. Our work provides further evidence that the SMR approximation can be directly applied to current gravitational wave observations.
description: 12 pages (5 pages plus appendix and references), 8 figures, 1 table. Reflects published version
Stochastic stability analysis of a reduced galactic dynamo model with perturbed α-effect
Creators: name: Kelly, Cónall
Publisher: name: arXiv
Year: 2016
Subjects: subject: Dynamical Systems (math.DS)
subject: FOS: Mathematics
subject: 37H15, 60H10, 60H30, 76E25

description: We investigate the asymptotic behaviour of a reduced αΩ-dynamo model of magnetic field generation in spiral galaxies where fluctuation in the α-effect results in a system with state-dependent stochastic perturbations. By computing the upper Lyapunov exponent of the linearised model, we can identify regions of instability and stability in probability for the equilibrium of the nonlinear model; in this case the equilibrium solution corresponds to a magnetic field that has undergone catastrophic quenching. These regions are compared to regions of exponential mean-square stability and regions of sub- and super-criticality in the unperturbed linearised model. Prior analysis in the literature which focuses on these latter regions does not adequately address the corresponding transition in the nonlinear stochastic model. Finally we provide a visual representation of the influence of drift non-normality and perturbation intensity on these regions.
description: 15 pages, 2 figures
TCFHs, IIB warped AdS backgrounds and hidden symmetries
Creators: name: Grimanellis, L.
name: Papadopoulos, G.
Publisher: name: arXiv
Year: 2022
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We present the twisted covariant form hierarchies (TCFHs) on the internal spaces of all type IIB warped AdS backgrounds. As a result we demonstrate that the form bilinears on the internal spaces satisfy a generalisation of the conformal Killing-Yano equation. We also explore some of the properties of the TCFHs, like for example the holonomy of the TCFH connections. In addition, we present examples where the form bilinears generate hidden symmetries for particle probes propagating on the internal spaces of some AdS backgrounds. These include the maximally supersymmetric AdS$_5$ solution as well as some of the near horizon geometries of intersecting IIB branes.
description: 29 pages
Искусственный интеллект и границы смысла: от симуляции к невозможному переводу
Creators: name: Басаргин, Олег Сергеевич
Publisher: name: Zenodo
Year: 2025

description: В статье рассматриваются концептуальные ограничения искусственного интеллекта (ИИ) в контексте понимания и генерации смысла. С опорой на высказывания Т.В. Черниговской и модель "Сфираль", анализируется различие между симуляцией когнитивных процессов и их подлинной реализацией. Предлагается рассматривать смысл не как результат вычислений, а как эффект перехода через узловые когнитивные структуры. Сфираль выступает как модель невозможности машинного мышления в его человеческом понимании.
Conjugacy classes of $π$-elements and nilpotent/abelian Hall $π$-subgroups
Creators: name: Hung, N. N.
name: Maróti, A.
name: Martínez, J.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Group Theory (math.GR)
subject: FOS: Mathematics
subject: 20E45 (Primary) 20D10, 20D20 (Secondary)

description: Let $G$ be a finite group and $π$ be a set of primes. We study finite groups with a large number of conjugacy classes of $π$-elements. In particular, we obtain precise lower bounds for this number in terms of the $π$-part of the order of $G$ to ensure the existence of a nilpotent or abelian Hall $π$-subgroup in $G$.
description: 18 pages
Bootstrapping Lieb-Schultz-Mattis anomalies
Creators: name: Lanzetta, Ryan A.
name: Fidkowski, Lukasz
Publisher: name: arXiv
Year: 2022
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We incorporate the microscopic assumptions that lead to a certain generalization of the Lieb-Schultz-Mattis (LSM) theorem for one-dimensional spin chains into the conformal bootstrap. Our approach accounts for the "LSM anomaly" possessed by these spin chains through a combination of modular bootstrap and correlator bootstrap of symmetry defect operators. We thus obtain universal bounds on the local operator content of (1+1)$d$ conformal field theories (CFTs) that could describe translationally invariant lattice Hamiltonians with a $\mathbb Z_N\times \mathbb Z_N$ symmetry realized projectively at each site. We present bounds on local operators both with and without refinement by their global symmetry representations. Interestingly, we can obtain non-trivial bounds on charged operators when $N$ is odd, which turns out to be impossible with modular bootstrap alone. Our bounds exhibit distinctive kinks, some of which are approximately saturated by known theories and others that are unexplained. We discuss additional scenarios with the properties necessary for our bounds to apply, including certain multicritical points between (1+1)$d$ symmetry protected topological phases, where we argue that the anomaly studied in our bootstrap calculations should emerge.
description: 24 pages, 10 figures; v2: minor corrections
Thermodynamic Uncertainty Relations for Steady-State Thermodynamics
Creators: name: Kamijima, Takuya
name: Ito, Sosuke
name: Dechant, Andreas
name: Sagawa, Takahiro
Publisher: name: arXiv
Year: 2022
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: A system can be driven out of equilibrium by both time-dependent and nonconservative forces, which gives rise to a decomposition of the dissipation into two non-negative components, called the excess and housekeeping entropy productions. We derive thermodynamic uncertainty relations for the excess and housekeeping entropy. These can be used as tools to estimate the individual components, which are in general difficult to measure directly. We introduce a decomposition of an arbitrary current into excess and housekeeping parts, which provide lower bounds on the respective entropy production. Furthermore, we also provide a geometric interpretation of the decomposition, and show that the uncertainties of the two components are not independent, but rather have to obey a joint uncertainty relation, which also yields a tighter bound on the total entropy production. We apply our results to two examples that illustrate the physical interpretation of the components of the current and how to estimate the entropy production.
description: 14 pages, 10 figures
Albert Mousson (1805-1890) an Joseph Wolfgang von Deschwanden (1819-1866)
Creators: name: Mousson, Albert
name: Esslinger, Melchior
Publisher: name: [s.n.]
Year: 1847

description: Brief ohne Ortsangabe, vermutlich aus Zürich.
Briefzusatz von Melchior Esslinger (1803-1855), gerichtet an Joseph Wolfgang von Deschwanden
Adaptive Repetitions Strategies in IEEE 802.11bd
Creators: name: Zhuofei, Wu
name: Bartoletti, Stefania
name: Martinez, Vincent
name: Bazzi, Alessandro
Publisher: name: arXiv
Year: 2022
Subjects: subject: Networking and Internet Architecture (cs.NI)
subject: FOS: Computer and information sciences

description: A new backward compatible WiFi amendment is under development by the IEEE bd Task Group towards the so-called IEEE 802.11bd, which includes the possibility to transmit up to three repetitions of the same packet. This feature increases time diversity and enables the use of maximum ratio combining (MRC) at the receiver to improve the probability of correct decoding. In this work, we first investigate the packet repetition feature and analyze how it looses its efficacy increasing the traffic as an higher number of transmissions may augment the channel load and collision probability. Then, we propose two strategies for adaptively selecting the number of transmissions leveraging on an adapted version of the channel busy ratio (CBR), which is measured at the transmitter and is an indicator of the channel load. The proposed strategies are validated through network-level simulations that account for both the acquisition and decoding processes. Results show that the proposed strategies ensure that devices use optimal settings under variable traffic conditions.
James Morton: Byzantine Religious Law in Medieval Italy
Creators: name: Chitwood, Zachary
Publisher: name: Das Mittelalter. Perspektiven mediävistischer Forschung
Year: 2023

description: James Morton, Byzantine Religious Law in Medieval Italy (Oxford Studies in Byzantium). Oxford, OUP 2021. 336 S. 15 s/w-Abb.
description: Das Mittelalter. Perspektiven mediävistischer Forschung, Bd. 28 Nr. 1 (2023): Die ‚Sieben weisen Meister‘ als globale Erzähltradition/The ‘Seven Sages of Rome’ as a Global Narrative Tradition
A nonlocal fractional Helmholtz equation
Creators: name: Kirane, Mokhtar
name: Turmetov, Batirkhan K.
name: Torebek, Berikbol T.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Analysis of PDEs (math.AP)
subject: FOS: Mathematics
subject: 35R30, 35K05, 35K20

description: In this paper we study some boundary value problems for a fractional analogue of second order elliptic equation with an involution perturbation in a rectangular domain. Theorems on existence and uniqueness of a solution of the considered problems are proved by spectral method.
description: 10 pages
Hanna Liss: Jüdische Bibelauslegung
Creators: name: Kogman-Appel, Katrin
Publisher: name: Das Mittelalter. Perspektiven mediävistischer Forschung
Year: 2023

description: Hanna Liss, Jüdische Bibelauslegung (UTB 5135. Jüdische Studien 4). Tübingen, Mohr Siebeck 2020. XXVI, 538 S.
description: Das Mittelalter. Perspektiven mediävistischer Forschung, Bd. 28 Nr. 1 (2023): Die ‚Sieben weisen Meister‘ als globale Erzähltradition/The ‘Seven Sages of Rome’ as a Global Narrative Tradition
Michael Perlaki, Weinhandlung für Ungarweine, an Joseph Wolfgang von Deschwanden (1819-1866)
Creators: name: Perlaki, Michael
Publisher: name: [s.n.]
Year: 1858

description: Gedrucktes Werbeschreiben aus Zürich.
Ausführungen betreffend Ungarweine und Erwähnung einer beigelegten Preisliste (urspr. beigelegt; siehe im folgenden eingeordnete Einheit)
Stability of nucleus-acoustic waves in completely degenerate white dwarf cores and their nearly degenerate ambience
Creators: name: Dasgupta, Sayanti
name: Atteya, Ahmed
name: Karmakar, Pralay Kumar
Publisher: name: arXiv
Year: 2022
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: Plasma Physics (physics.plasm-ph)
subject: FOS: Physical sciences

description: We analyze the propagatory nucleus-acoustic wave (NAW) modes excitable in the completely degenerate (CD) core and in its nearly degenerate (ND) ambience of the ONe and CO white dwarfs (WDs). It is based on three-component spherical hydrodynamic quantum plasma consisting of tiny non-thermal quantum electrons, classical thermal light nuclear species (LNS), and classical thermal heavy nuclear species (HNS). The inner concentric layer-wise electronic pressures are judiciously modelled. The electronic energy distribution governed by the Fermi-Dirac (FD) thermostatistical distribution law involves both the thermodynamical temperature and chemical potential. Our exploration emphasizes on the transition state between the thermodynamical temperature and the Fermi temperature for the borderline regions of intermediate degeneracy. A normal spherical mode analysis procedurally yields a sextic generalized linear dispersion relation highlighting the plasma multiparametric dependency of the NAW-features. A numerical illustrative platform is constructed to investigate the full NAW propagatory and dispersive behaviours. We demonstrate that the NAW in ONe (CO) WDs exhibits sensible growth characteristics at near the transcritical (supercritical) wave zone. The temperature-sensitivity of the NAW-growth is more (less) prominent in ONe (CO) WDs. It could be hopefully useful to see the internal structure of compact astroobjects from the asteroseismic probe-perspective of collective quantum interaction processes.
description: 25 pages, 20 figures, 1 table
Christian Kiening u. Hannes Koller: Narrative Mikroökonomien der frühen Neuzeit
Creators: name: Bamberger, Gudrun
Publisher: name: Das Mittelalter. Perspektiven mediävistischer Forschung
Year: 2023

description: Christian Kiening u. Hannes Koller, Narrative Mikroökonomien der frühen Neuzeit. Am Beispiel von Wickrams Rollwagenbüchlein. Zürich, Chronos 2021. 112 S.
description: Das Mittelalter. Perspektiven mediävistischer Forschung, Bd. 28 Nr. 1 (2023): Die ‚Sieben weisen Meister‘ als globale Erzähltradition/The ‘Seven Sages of Rome’ as a Global Narrative Tradition
Improving Population Monte Carlo: Alternative Weighting and Resampling Schemes
Creators: name: Elvira, Víctor
name: Martino, Luca
name: Luengo, David
name: Bugallo, Mónica F.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Computation (stat.CO)
subject: FOS: Computer and information sciences

description: Population Monte Carlo (PMC) sampling methods are powerful tools for approximating distributions of static unknowns given a set of observations. These methods are iterative in nature: at each step they generate samples from a proposal distribution and assign them weights according to the importance sampling principle. Critical issues in applying PMC methods are the choice of the generating functions for the samples and the avoidance of the sample degeneracy. In this paper, we propose three new schemes that considerably improve the performance of the original PMC formulation by allowing for better exploration of the space of unknowns and by selecting more adequately the surviving samples. A theoretical analysis is performed, proving the superiority of the novel schemes in terms of variance of the associated estimators and preservation of the sample diversity. Furthermore, we show that they outperform other state of the art algorithms (both in terms of mean square error and robustness w.r.t. initialization) through extensive numerical simulations.
description: Signal Processing, 2016
Norbert Kössinger: Schriftrollen
Creators: name: Holz, Stefan G.
Publisher: name: Das Mittelalter. Perspektiven mediävistischer Forschung
Year: 2023

description: Norbert Kössinger, Schriftrollen. Untersuchungen zu deutschsprachigen und mittelniederländischen Rotuli (Münchener Texte und Untersuchungen zur deutschen Literatur des Mittelalters 148). Wiesbaden, Reichert 2020. X, 573 S. 1 s/w-Abb., 60 farb. Abb.
description: Das Mittelalter. Perspektiven mediävistischer Forschung, Bd. 28 Nr. 1 (2023): Die ‚Sieben weisen Meister‘ als globale Erzähltradition/The ‘Seven Sages of Rome’ as a Global Narrative Tradition
Behavioral changes during the pandemic worsened income diversity of urban encounters
Creators: name: Yabe, Takahiro
name: Bueno, Bernardo Garcia Bulle
name: Dong, Xiaowen
name: Pentland, Alex `Sandy'
name: Moro, Esteban
Publisher: name: arXiv
Year: 2022
Subjects: subject: Physics and Society (physics.soc-ph)
subject: FOS: Physical sciences

description: Diversity of physical encounters and social interactions in urban environments are known to spur economic productivity and innovation in cities, while also to foster social capital and resilience of communities. However, mobility restrictions during the pandemic have forced people to substantially reduce urban physical encounters, raising questions on the social implications of such behavioral changes. In this paper, we study how the income diversity of urban encounters have changed during different periods throughout the pandemic, using a large-scale, privacy-enhanced mobility dataset of more than one million anonymized mobile phone users in four large US cities, collected across three years spanning before and during the pandemic. We find that the diversity of urban encounters have substantially decreased (by 15% to 30%) during the pandemic and has persisted through late 2021, even though aggregated mobility metrics have recovered to pre-pandemic levels. Counterfactual analyses show that while the reduction of outside activities (higher rates of staying at home) was a major factor that contributed to decreased diversity in the early stages of the pandemic, behavioral changes including lower willingness to explore new places and changes in visitation preferences further worsened the long-term diversity of encounters. Our findings suggest that the pandemic could have long-lasting negative effects on urban income diversity, and provide implications for managing the trade-off between the stringency of COVID-19 policies and the diversity of urban encounters as we move beyond the pandemic.
description: main: 13 pages, 4 figures; supplementary: 46 pages, 25 figures, 14 tables
A study of symmetry breaking in a relativistic Bose gas using the contraction algorithm
Creators: name: Alexandru, Andrei
name: Basar, Gokce
name: Bedaque, Paulo
name: Ridgway, Gregory W.
name: Warrington, Neill C.
Publisher: name: arXiv
Year: 2016
Subjects: subject: High Energy Physics - Lattice (hep-lat)
subject: FOS: Physical sciences

description: A relativistic Bose gas at finite density suffers from a sign problem that makes direct numerical simulations not feasible. One possible solution to the sign problem is to re-express the path integral in terms of Lefschetz thimbles. Using this approach we study the relativistic Bose gas both in the symmetric phase (low-density) and the spontaneously broken phase (high-density). In the high-density phase we break explicitly the symmetry and determine the dependence of the order parameter on the breaking. We study the relative contributions of the dominant and sub-dominant thimbles in this phase. We find that the sub-dominant thimble only contributes substantially when the explicit symmetry breaking is small, a regime that is dominated by finite volume effects. In the regime relevant for the thermodynamic limit, this contribution is negligible.
description: 12 pages, 6 figures, 1 table
Im Namen der Naturforschenden Gesellschaft Zürich, Rudolf Heinrich Hofmeister (1814-1887), Protokollauszug aus der Jahresversammlung mit der Mitteilung der Wahl zum Präsidenten, an Joseph Wolfgang von Deschwanden (1819-1866)
Creators: name: Naturforschende Gesellschaft in Zürich
Publisher: name: [s.n.]
Year: 1853

description: Protokoll-Auszug aus Zürich.
Unterzeichnung durch Aktuar: R. H. Hofmeister, Oberlehrer
Causal Stroh formalism for uniformly-moving dislocations in anisotropic media: Somigliana dislocations and Mach cones
Creators: name: Pellegrini, Yves-Patrick
Publisher: name: arXiv
Year: 2016
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Classical Physics (physics.class-ph)
subject: FOS: Physical sciences

description: In this work, Stroh's formalism is endowed with causal properties on the basis of an analysis of the radiation condition in the Green tensor of the elastodynamic wave equation. The modified formalism is applied to dislocations moving uniformly in an anisotropic medium. In practice, accounting for causality amounts to a simple analytic continuation procedure whereby to the dislocation velocity is added an infinitesimal positive imaginary part. This device allows for a straightforward computation of velocity-dependent field expressions that are valid whatever the dislocation velocity ---including supersonic regimes--- without needing to consider subsonic and supersonic cases separately. As an illustration, the distortion field of a Somigliana dislocation of the Peierls-Nabarro-Eshelby-type with finite-width core is computed analytically, starting from the Green tensor of elastodynamics. To obtain the result in the form of a single compact expression, use of the modified Stroh formalism requires splitting the Green function into its reactive and radiative parts. In supersonic regimes, the solution obtained displays Mach cones, which are supported by Dirac measures in the Volterra limit. From these results, an explanation of Payton's `backward' Mach cones [R.G. Payton, Z. Angew. Math. Phys. 46, 282--288 (1995)] is given in terms of slowness surfaces, and a simple criterion for their existence is derived. The findings are illustrated by full-field calculations from analytical formulas for a dislocation of finite width in iron, and by Huygens-type geometric constructions of Mach cones from ray surfaces.
description: 25 pages, 4 figures
Nikolaus von Moos (1818-1877) an Joseph Wolfgang von Deschwanden (1819-1866)
Creators: name: Moos, Nikolaus von
Publisher: name: [s.n.]
Year: 1838

description: Brief ohne Ortsangabe, vermutlich aus Sachseln, datiert mit Osterdienstag vor dem Feste.
Gegen Ende des Briefes kommt er auf die Rechtsverhältnisse von Obwalden und Nidwalden zu sprechen: ..."Uns belebt beide der Gedanke an eine geistige Auferstehung Unterwaldens..."
Angaben zur Laufbahn von Nikolaus von Moos: 1843 Landschreiber in Obwalden; der Brief ist sehr wahrscheinlich vorher verfasst, aber nicht vor 1838, denn davor ist J. W. von Deschwanden in St. Gallen und nicht in Zürich
Sandra Hofert: Didaxe und Natur
Creators: name: Schneider, Christian
Publisher: name: Das Mittelalter. Perspektiven mediävistischer Forschung
Year: 2023

description: Sandra Hofert, Didaxe und Natur. Darstellung und Funktionalisierung der Natur in Thomasins von Zerklaere ‚Welschem Gast‘, in Freidanks ‚Bescheidenheit‘ und in Hugos von Trimberg ‚Renner‘ (Wissensliteratur im Mittelalter 56). Wiesbaden, Reichert 2021. 384 S. 6 s/w-Abb.
description: Das Mittelalter. Perspektiven mediävistischer Forschung, Bd. 28 Nr. 1 (2023): Die ‚Sieben weisen Meister‘ als globale Erzähltradition/The ‘Seven Sages of Rome’ as a Global Narrative Tradition
Constraints on primordial black holes from observation of stars in dwarf galaxies
Creators: name: Esser, Nicolas
name: Tinyakov, Peter
Publisher: name: arXiv
Year: 2022
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: We propose a way to constrain the primordial black hole (PBH) abundance in the range of PBH masses $m$ around $10^{20}$g based on their capture by Sun-like stars in dwarf galaxies, with subsequent star destruction. We calculate numerically the probability of a PBH capture by a star at the time of its formation in an environment typical of dwarf galaxies. Requiring that no more than a fraction $ξ$ of stars in a dwarf galaxy is destroyed by PBHs translates into an upper limit on the PBH abundance. For the parameters of Triangulum II and $ξ=0.5$, we find that no more than $\sim 35\%$ of dark matter can consist of PBHs in the mass range $10^{18} - \text{(a few)}\times 10^{21}$g. The constraints depend strongly on the parameter $ξ$ and may significantly improve if smaller values of $ξ$ are established from observations. An accurate determination of $ξ$ from dwarf galaxy modeling is thus of major importance.
description: 6 pages, 2 figures
Precise observations of the 12C/13C ratios of HC3N in the low-mass star-forming region L1527
Creators: name: Araki, Mitsunori
name: Takano, Shuro
name: Sakai, Nami
name: Yamamoto, Satoshi
name: Oyama, Takahiro
name: Kuze, Nobuhiko
name: Tsukiyama, Koichi
Publisher: name: arXiv
Year: 2016
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: Using the Green Bank 100 m telescope and the Nobeyama 45 m telescope, we have observed the rotational emission lines of the three 13C isotopic species of HC3N in the 3 and 7 mm bands toward the low-mass star-forming region L1527 in order to explore their anomalous 12C/13C ratios. The column densities of the 13C isotopic species are derived from the intensities of the J = 5-4 lines observed at high signal-to-noise ratios. The abundance ratios are determined to be 1.00:1.01 +- 0.02:1.35 +- 0.03:86.4 +- 1.6 for [H13CCCN]:[HC13CCN]:[HCC13CN]:[HCCCN], where the errors represent one standard deviation. The ratios are very similar to those reported for the starless cloud, Taurus Molecular Cloud-1 Cyanopolyyne Peak (TMC-1 CP). These ratios cannot be explained by thermal equilibrium, but likely reflect the production pathways of this molecule. We have shown the equality of the abundances of H13CCCN and HC13CCN at a high-confidence level, which supports the production pathways of HC3N via C2H2 and C2H2+. The average 12C/13C ratio for HC3N is 77 +- 4, which may be only slightly higher than the elemental 12C/13C ratio. Dilution of the 13C isotope in HC3N is not as significant as that in CCH or c-C3H2. We have also simultaneously observed the DCCCN and HCCC15N lines and derived the isotope ratios: [DCCCN]/[HCCCN] = 0.0370 +- 0.0007 and [HCCCN]/[HCCC15N] = 338 +- 12.
description: 3 figures, 4 tables, 20 pages
Hydroperiod of temporary ponds threats amphibian recruitment in Mediterranean environments
Creators: name: Segura, Amalia
name: Palomar, Gemma
Publisher: name: Brill Online
Year: 2023
Subjects: Ecology not elsewhere classified

description: Climate change threatens amphibians because they depend on water availability. The amount of time that a pond is filled with water – the hydroperiod – may play an important role in larval development and recruitment. Nevertheless it is usually not taken into account when predicting future species trends. We evaluated the role of the hydroperiod in the abundance of five amphibian species in temporal ponds of a Moroccan forest during a seven-year period. Particularly, we characterized the ponds and compared the climatic variables affecting our system with the previous eight-year period. We tested the relationship between rainfall and hydroperiod, and we identified the best predictor of amphibian abundance. Our data showed that the last seven years were drier than the previous eight, being three of them so dry that none of the amphibian species bred successfully in those seasons. We demonstrated that hydroperiod was the best predictor of the abundance of amphibian species and affected the amphibian community composition. The rainfall was correlated with the hydroperiod and the number of ponds filled. Species with long larval periods such as the endangered Moroccan spadefoot toad and the sharp ribbed newt might be more vulnerable to climate change since they need longer hydroperiods to develop. However, widespread species with shorter hydroperiods such as the Mauretanian toad or the stripeless tree frog might be favoured. In order to predict accurately amphibian species trend under climate change scenarios and to develop adequate conservation strategies, hydroperiod should be considered in both the models and mitigation actions.
Stochastic integration in Riemannian manifolds from a functional-analytic point of view
Creators: name: Mustăţea, Alexandru
Publisher: name: arXiv
Year: 2022
Subjects: subject: Functional Analysis (math.FA)
subject: Differential Geometry (math.DG)
subject: Probability (math.PR)
subject: FOS: Mathematics
subject: 60H05 (Primary) 58J90, 58J65, 46E30, 35K08, 28C20 (Secondary)

description: This article presents a construction of the concept of stochastic integration in Riemannian manifolds from a purely functional-analytic point of view. We show that there are infinitely many such integrals, and that any two of them are related by a simple formula. We also find that the Stratonovich and Itô integrals known to probability theorists are two instances of the general concept constructed herein.
description: Minor corrections and additions. Final draft, accepted for publication in "Journal of Functional Analysis"
Explosion mechanism of core-collapse supernovae: role of the Si/O interface
Creators: name: Boccioli, Luca
name: Roberti, Lorenzo
name: Limongi, Marco
name: Mathews, Grant J.
name: Chieffi, Alessandro
Publisher: name: arXiv
Year: 2022
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: We present a simple criterion to predict the explodability of massive stars based on the density and entropy profiles before collapse. If a pronounced density jump is present near the Si/Si-O interface, the star will likely explode. We develop a quantitative criterion by using $\sim 1300$ 1D simulations where $ν$-driven turbulence is included via time-dependent mixing-length theory. This criterion correctly identifies the outcome of the supernova more than $90 \%$ of the time. We also find no difference in how this criterion performs on two different sets of progenitors, evolved using two different stellar evolution codes: FRANEC and KEPLER. The explodability as a function of mass of the two sets of progenitors is very different, showing: (i) that uncertainties in the stellar evolution prescriptions influence the predictions of supernova explosions; (ii) the most important properties of the pre-collapse progenitor that influence the explodability are its density and entropy profiles. We highlight the importance that $ν$-driven turbulence plays in the explosion by comparing our results to previous works.
description: 20 pages, 12 figures, submitted to ApJ
Alfred Hiatt: Dislocations
Creators: name: Baumgärtner, Ingrid
Publisher: name: Das Mittelalter. Perspektiven mediävistischer Forschung
Year: 2023

description: Alfred Hiatt, Dislocations. Maps, Classical Tradition, and Spatial Play in the European Middle Ages (Studies and Texts 218). Toronto, Pontifical Institute of Mediaeval Studies. Turnhout, Brepols 2020. XII, 347 S. 42 farb. Abb.
description: Das Mittelalter. Perspektiven mediävistischer Forschung, Bd. 28 Nr. 1 (2023): Die ‚Sieben weisen Meister‘ als globale Erzähltradition/The ‘Seven Sages of Rome’ as a Global Narrative Tradition
Localized layers of turbulence in stratified horizontally sheared Poiseuille flow
Creators: name: Labarbe, Joris
name: Gal, Patrice Le
name: Harlander, Uwe
name: Dizès, Stéphane Le
name: Favier, Benjamin
Publisher: name: arXiv
Year: 2022
Subjects: subject: Fluid Dynamics (physics.flu-dyn)
subject: FOS: Physical sciences

description: This article presents a numerical analysis of the instability developing in horizontally sheared Poiseuille flow, when stratification extends along the vertical direction. Our study builds up on the previous work that originally detected the linear instability of such configuration, by means of experiments, theoretical analysis and numerical simulations \citep{G21}. We extend hereafter this former investigation beyond linear theory, investigating nonlinear regimes with direct numerical simulations. We notice that the flow loses its vertical homogeneity through a secondary bifurcation, due to harmonic resonances, and further describe this symmetry-breaking mechanism in the vicinity of the instability threshold. When departing away from this limit, we observe a series of bursting events that break down the flow into disordered motions driven by localized shear instabilities. This intermittent dynamics leads to the coexistence of horizontal localized layers of stratified turbulence surrounded by quiescent regions of meandering waves.
A critical look at the merger scenario to explain multiple populations and rotation in iron-complex globular clusters
Creators: name: Gavagnin, Elena
name: Mapelli, Michela
name: Lake, George
Publisher: name: arXiv
Year: 2016
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: Merging has been proposed to explain multiple populations in globular clusters (GCs) where there is a spread in iron abundance (hereafter, iron-complex GCs). By means of N-body simulations, we investigate if merging is consistent with the observations of sub-populations and rotation in iron-complex GCs. The key parameters are the initial mass and density ratios of the progenitors. When densities are similar, the more massive progenitor dominates the central part of the merger remnant and the less massive progenitor forms an extended rotating population. The low-mass progenitor can become the majority population in the central regions of the merger remnant only if its initial density is higher by roughly the mass ratio. To match the radial distribution of multiple populations in two iron-complex GCs (ω Cen and NGC 1851), the less massive progenitor needs to be four times as dense as the larger one. Our merger remnants show solid-body rotation in the inner parts, becoming differential in the outer parts. Rotation velocity V and ellipticity ε are in agreement with models for oblate rotators with isotropic dispersion. We discuss several kinematic signatures of a merger with a denser lower mass progenitor that can be tested with future observations.
description: 13 pages, 11 figures, accepted for publication in MNRAS
Lukas G. Grzybowski: The Christianization of Scandinavia in the Viking Era
Creators: name: Scior, Volker
Publisher: name: Das Mittelalter. Perspektiven mediävistischer Forschung
Year: 2023

description: Lukas G. Grzybowski, The Christianization of Scandinavia in the Viking Era. Religious Change in Adam of Bremen’s Historical Work (Beyond Medieval Europe). Leeds, Arc Humanities Press 2021. 168 S.
description: Das Mittelalter. Perspektiven mediävistischer Forschung, Bd. 28 Nr. 1 (2023): Die ‚Sieben weisen Meister‘ als globale Erzähltradition/The ‘Seven Sages of Rome’ as a Global Narrative Tradition
Behaviour of elements from lithium to europium in stars with and without planets
Creators: name: Mishenina, T.
name: Kovtyukh, V.
name: Soubiran, C.
name: Adibekyan, V. Zh.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: We conducted an analysis of the distribution of elements from lithium to europium in 200 dwarfs in the solar neighbourhood ~20 pc with temperatures in the range 4800-6200 K and metallicities [Fe/H] higher than -0.5 dex. Determinations of atmospheric parameters and the chemical composition of the dwarfs were taken from our previous studies. We found that the lithium abundances in the planet-hosting solar-analog stars of our sample were lower than those in the stars without planetary systems. Our results reveal no significant differences exceeding the determination errors for the abundances of investigated elements, except for aluminium and barium, which are more and less abundant in the planet-hosting stars, respectively. We did not find confident dependences of the lithium, aluminium and barium abundances on the ages of our target stars (which is probable because of the small number of stars). Furthermore, we found no correlation between the abundance differences in [El/Fe] and the condensation temperature (Tcond) for stars in the 16 Cyg binary system, unlike the case for 51 Peg (HD 217014), for which a slight excess of volatile elements and a deficit of refractories were obtained relative to those of solar twins. We found that one of the components of 16 Cyg exhibits a slightly higher average abundance than its counterpart ( = 0.08+/-0.02 dex); however, no significant abundance trend versus Tcond was observed. Owing to the relatively large errors, we cannot provide further constraints for this system.
description: 25 pages, 15 figures, 10 tables, corrected version, published on MNRAS in August 2016
Carl Köhler, Buchdrucker, an Joseph Wolfgang von Deschwanden (1819-1866)
Creators: name: Köhler, Carl
Publisher: name: [s.n.]
Year: 1846

description: Brief aus Zürich.
Interpretation der Unterschrift bis 2023: Möckler, Buchh.
Versch. Buchtitel sind nachgewiesen als "gedruckt bei Carl Köhler, Zürich"
Synthetically Non-Hermitian Nonlinear Wave-like Behavior in a Topological Mechanical Metamaterial
Creators: name: Xiu, Haning
name: Frankel, Ian
name: Liu, Harry
name: Qian, Kai
name: Sarkar, Siddhartha
name: Macnider, Brianna C.
name: Chen, Zi
name: Boechler, Nicholas
name: Mao, Xiaoming
Publisher: name: arXiv
Year: 2022
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: Applied Physics (physics.app-ph)
subject: FOS: Physical sciences

description: Topological mechanical metamaterials have enabled new ways to control stress and deformation propagation. Exemplified by Maxwell lattices, they have been studied extensively using a linearized formalism. Herein, we study a two-dimensional topological Maxwell lattice by exploring its large deformation quasi-static response using geometric numerical simulations and experiments. We observe spatial nonlinear wave-like phenomena such as harmonic generation, localized domain switching, amplification-enhanced frequency conversion, and solitary waves. We further map our linearized, homogenized system to a non-Hermitian, non-reciprocal, one-dimensional wave equation, revealing an equivalence between the deformation fields of two-dimensional topological Maxwell lattices and nonlinear dynamical phenomena in one-dimensional active systems. Our study opens a new regime for topological mechanical metamaterials and expands their application potential in areas including adaptive and smart materials, and mechanical logic, wherein concepts from nonlinear dynamics may be used to create intricate, tailored spatial deformation and stress fields greatly exceeding conventional elasticity.
description: 12 pages, 7 figures
Modeling of Spatial Uncertainties in the Magnetic Reluctivity
Creators: name: Jankoski, Radoslav
name: Römer, Ulrich
name: Schöps, Sebastian
Publisher: name: arXiv
Year: 2016
Subjects: subject: Computational Engineering, Finance, and Science (cs.CE)
subject: Numerical Analysis (math.NA)
subject: FOS: Computer and information sciences
subject: FOS: Mathematics
subject: G.1.8; J.2; J.6
subject: 60H15, 65C30, 65N30

description: In this paper a computationally efficient approach is suggested for the stochastic modeling of an inhomogeneous reluctivity of magnetic materials. These materials can be part of electrical machines, such as a single phase transformer (a benchmark example that is considered in this paper). The approach is based on the Karhunen-Loève expansion. The stochastic model is further used to study the statistics of the self inductance of the primary coil as a quantity of interest.
description: submitted to COMPEL
title: The Development of Genetic Algorithm for the Prediction of Ship Motion from Wave Radar Data
Creators: name: Vangipuram, Sumanth Tirumala
Publisher: name: Old Dominion University
publisherIdentifier: https://ror.org/04zjtrb98
publisherIdentifierScheme: ROR
Year: 2008

description: Genetic Algorithms represent a model of natural process based on the Darwinian principle of evolution. Genetic algorithms are used to solve optimization problems by generating a set of possible solutions and determining which of these solutions most closely match the desired result. The Genetic Algorithm (GA) initially generates a random set of possible solutions, or populations, determines which members of the population are most desirable, and calculates better solutions by implementing genetic operations such as reproduction, cloning, and mutation. Problems where the evaluation of a solution is computationally simple enable the GA to search a vast search space. One of the very important applications of genetic algorithms is in predicting the motion of ship due to the sea conditions or wave structure.

This thesis mainly focuses on the development of a GA to predict ship motion from surface wave data. Various GA techniques, their advantages, and drawbacks are discussed. The applicability of these techniques for this application is also investigated. The selection of genetic operators will determine how the characteristics of future members of the population (or children) are related to the suitability of existing (or parent) members. Reproduction is used to obtain a solution that has the direct characteristics from the parents. Crossover is used to get a solution that has a combination of characteristics from both the parents based on certain criteria. Mutation is implemented in situations where diversity is desired to avoid convergence to a local minimum in the search space.

In this thesis, an algorithm to predict ship motion based on GA techniques will be presented, and results of the approach for simulated sea states will be discussed. The proposed GA uses three genetic operators (Reproduction, Crossover, and Mutation) that are tested on these sea states with varied configurations of the GA process. This algorithm searches for the best transfer function of the ship motion based on different sea states (ocean surfaces) in order to derive the coefficients for the predicted motion that best represents the actual ship motion. A comparison is then made between the results obtained from different sea states to determine the best GA configuration to provide the most rapid and best fit to the actual ship motion for the selected sea surface. This algorithm has prominent applications in logistics ( cargo transfer between the ships in the middle of the sea) and military purposes (launching ship board missiles). In addition, for high performance vessels, such an algorithm could allow the real time adjustment of heading to avoid severe sea conditions that may damage ship, cargo, or personnel.
Lehrerpersonal an der eidgenössischen polytechnischen Schule.
Gedruckte Übersicht über Professoren, Hilfslehrer, Assistenten, Privatdozenten, aufbewahrt im Nachlass von Joseph Wolfgang von Deschwanden (1819-1866)
Creators: name: Schule, Eidgenössische Polytechnische, Behörden, Lehrkörper und Verwaltung
Publisher: name: [s.n.]
Year: 1859

description: Verzeichnis, unter Angabe des Wahljahres der aufgelisteten Personen (ab 1855, als letztes ist 1859 aufgeführt).
Die erste Zeile der Übersicht lautet: "Direktor: Herr v. Deschwanden, Joseph Wolfg. von Stanz"
Mit Bleistiftvermerken
Franziska Groß: Verheißung und Verderben
Creators: name: Merkelbach, Rebecca
Publisher: name: Das Mittelalter. Perspektiven mediävistischer Forschung
Year: 2023

description: Franziska Groß, Verheißung und Verderben. Das Motiv der Träume in der altnordischen Sagaliteratur (Münchner Nordistische Studien 47). München, utz 2021. 442 S.
description: Das Mittelalter. Perspektiven mediävistischer Forschung, Bd. 28 Nr. 1 (2023): Die ‚Sieben weisen Meister‘ als globale Erzähltradition/The ‘Seven Sages of Rome’ as a Global Narrative Tradition