cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
The effects of driving time scales on coronal heating in a stratified atmosphere
Creators: name: Howson, Thomas
name: De Moortel, Ineke
Publisher: name: arXiv
Year: 2022
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: Aims: We investigate the atmospheric response to coronal heating driven by random flows with different characteristic time scales and amplitudes. Methods: We conducted a series of 3D MHD simulations of random driving imposed on a gravitationally stratified model of the solar atmosphere. In order to understand differences between alternating current (AC) and direct current (DC) heating, we considered the effects of changing the characteristic time scales of the imposed velocities. We also investigated the effects of the magnitude of the velocity driving. Results: Complex foot point motions lead to a proliferation of current sheets and energy dissipation throughout the corona. For a given amplitude, DC driving typically leads to a greater rate of energy injection when compared to AC driving. This leads to the formation of larger currents, increased heating rates and higher temperatures in DC simulations. There is no difference in the spatial distribution of energy dissipation across simulations, however, energy release events in AC cases tend to be more frequent and last for less time. Higher velocity driving is associated with larger currents, higher temperatures and the corona occupying a larger fraction of the simulation volume. In all cases, most of heating is associated with small energy release events, which occur much more frequently than large events. Conclusions: When combined with observational results showing a greater abundance of power in low frequency modes, these findings suggest that energy release in the corona is likely to be driven by long time scale motions. In the corona, AC and DC driving will occur concurrently and their effects remain difficult to isolate. The distribution of field line temperatures and the asymmetry of temperature profiles may reveal the frequency and longevity of energy release events and therefore the relative importance of AC and DC heating.
description: 14 pages, 15 figures
Autonomy of Soft Robotic Submersible Systems with  Minimal Simple Electronics
Creators: name: Longwell, Cody R.
name: Trystad, Conor K.
name: Pérez-Arancibia, Néstor
Publisher: name: Zenodo
Year: 2025

description: Published in NRT-LEAD Annual Expo-2025 Booklet.
description: Underwater robots serve as valuable tools in search and rescue, environmental monitoring, agriculture, and infrastructure inspection. At their smallest scale, they enable minimally invasive exploration of environments that are traditionally difficult or even impossible for human study. However, despite their broad range of applications, submersible robotics face significant challenges, particularly in power storage and the high energy demands of conventional actuators like motors and piezoelectric ceramics. Traditional hard-bodied robots, while effective for research and exploration, come with several drawbacks. Larger platforms require more powerful actuators, which in turn demand greater energy consumption. To address this, many systems rely on tethered power delivery. While effective in supplying the necessary energy, tethers introduce new limitations, including restricted movement and potential environmental disruption. In sensitive ecosystems like coral reefs or complex underwater structures, an umbilical cable increases the risk of damaging both the environment and the robot itself. A promising solution to these challenges is soft robots. Unlike rigid structures, soft robots offer enhanced safety by reducing the risk of physical damage to delicate ecosystems. Additionally, alternative actuation methods, such as shape-memory alloys (SMAs), present an energy efficient alternative to traditional motors. Since SMA actuators do not require direct electrical power, they can leverage external energy sources like water reactive chemicals, allowing actuation using heat rather than electrical power. By incorporating simpler electronics and minimizing electrical components, underwater robots can operate with smaller batteries. These innovations pave the way for more sustainable, autonomous, and eco-friendly underwater exploration and monitoring systems.
REDCHO: Robust Exact Dynamic Consensus of High Order
Creators: name: Aldana-López, Rodrigo
name: Aragüés, Rosario
name: Sagüés, Carlos
Publisher: name: arXiv
Year: 2022
Subjects: subject: Systems and Control (eess.SY)
subject: Multiagent Systems (cs.MA)
subject: Optimization and Control (math.OC)
subject: FOS: Electrical engineering, electronic engineering, information engineering
subject: FOS: Computer and information sciences
subject: FOS: Mathematics

description: This article addresses the problem of average consensus in a multi-agent system when the desired consensus quantity is a time varying signal. Recently, the EDCHO protocol leveraged high order sliding modes to achieve exact consensus under a constrained set of initial conditions, limiting its applicability to static networks. In this work, we propose REDCHO, an extension of the previous protocol which is robust to mismatch in the initial conditions, making it suitable to use cases in which connection and disconnection of agents is possible. The convergence properties of the protocol are formally explored. Finally, the effectiveness and advantages of our proposal are shown with concrete simulation examples showing the benefits of REDCHO against other methods in the literature.
description: This is the preprint version of the accepted Manuscript: Rodrigo Aldana-Lopez, Rosario Aragues, Carlos Sagues, REDCHO: Robust Exact Dynamic Consensus of High Order, Automatica, Volume 141, 2022, ISSN 0005-1098
Casimir contribution to the interfacial Hamiltonian for 3D wetting
Creators: name: Squarcini, Alessio
name: Romero-Enrique, José M.
name: Parry, Andrew O.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Soft Condensed Matter (cond-mat.soft)
subject: FOS: Physical sciences

description: Previous treatments of three-dimensional (3D) short-ranged wetting transitions have missed an entropic or low temperature Casimir contribution to the binding potential describing the interaction between the unbinding interface and wall. This we determine by exactly deriving the interfacial model for 3D wetting from a more microscopic Landau-Ginzburg-Wilson Hamiltonian. The Casimir term changes the interpretation of fluctuation effects occurring at wetting transitions so that, for example, mean-field predictions are no longer obtained when interfacial fluctuations are ignored. While the Casimir contribution does not alter the surface phase diagram, it significantly increases the adsorption near a first-order wetting transition and changes completely the predicted critical singularities of tricritical wetting, including the non-universality occurring in 3D arising from interfacial fluctuations. Using the numerical renormalization group we show that, for critical wetting, the asymptotic regime is extremely narrow with the growth of the parallel correlation length characterised by an effective exponent in quantitative agreement with Ising model simulations, resolving a longstanding controversy.
description: 5 pages, 2 figures, and 2 pages of supplementary material
On Exceptional 't Hooft Lines in 4D-Chern-Simons Theory
Creators: name: Boujakhrout, Youssra
name: Saidi, El Hassan
Publisher: name: arXiv
Year: 2022
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: We study 't Hooft lines and the associated $\mathcal{L}$- operators in topological 4D Chern-Simons theory with gauge symmetry given by the exceptional groups E$_{6}$ and E$_{7}$. We give their oscillator realisations and propose topological gauge quivers encoding the properties of these topological lines where Darboux coordinates are interpreted in terms of topological fundamental matter. Other related aspects are also described.
description: LaTeX, 23 pages, 7 figures
The stellar mass distribution of the Milky Way's bar: an analytic model
Creators: name: Sormani, Mattia C.
name: Gerhard, Ortwin
name: Portail, Matthieu
name: Vasiliev, Eugene
name: Clarke, Jonathan
Publisher: name: arXiv
Year: 2022
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We present an analytic model of the stellar mass distribution of the Milky Way bar. The model is obtained by fitting a multi-component parametric density distribution to a made-to-measure N-body model of Portail et al., constructed to match a variety of density and kinematics observational data. The analytic model reproduces in detail the 3D density distribution of the N-body bar including the X-shape. The model and the gravitational potential it generates are available as part of the software package AGAMA for galactic dynamics, and can be readily used for orbit integrations, hydrodynamical simulations or other applications.
description: Accepted in MNRAS letters
Supplementary document for Optimization of Si Doping in GaN Nanowires for High-Performance Photoelectrochemical Photodetectors - 7455708.pdf
Creators: name: Zhang, Wenze
name: Chen, Wei
name: Li, Yang
name: Song, Yunfei
name: Sun, Haiding
name: Liang, Kang
name: Liu, Sheng
Publisher: name: Optica Publishing Group
Year: 2025
Subjects: Uncategorized

description: Experiment details
The evolving properties of the corona of GRS 1915+105: A spectral-timing perspective through variable-Comptonisation modelling
Creators: name: García, Federico
name: Karpouzas, Konstantinos
name: Méndez, Mariano
name: Zhang, Liang
name: Zhang, Yuexin
name: Belloni, Tomaso
name: Altamirano, Diego
Publisher: name: arXiv
Year: 2022
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: The inverse Compton process by which soft photons are up-scattered by hot electrons in a corona plays a fundamental role in shaping the X-ray spectra of black-hole (BH) low-mass X-ray binaries (LMXBs), particularly in the hard and hard-intermediate states. In these states, the power-density spectra of these sources typically show Type-C low-frequency quasi-periodic oscillations (QPOs). Although several models have been proposed to explain the dynamical origin of their frequency, only a few of those models predict the spectral-timing radiative properties of the QPOs. Here we study the physical and geometrical properties of the corona of the BH-LMXB GRS 1915+105 based on a large sample of observations available in the RXTE archive. We use a recently-developed spectral-timing Comptonisation model to fit simultaneously the energy-dependent fractional rms amplitude and phase-lag spectra of the Type-C QPO in 398 observations. For this, we include spectral information gathered from fitting a Comptonisation model to the corresponding time-averaged spectra. We analyse the dependence of the physical and geometrical properties of the corona upon the QPO frequency and spectral state of the source, the latter characterised by the hardness ratio. We find consistent trends in the evolution of the corona size, temperature, and feedback (the fraction of the corona photons that impinge back onto the disc) that persist for roughly 15~years. By correlating our observations with simultaneous radio-monitoring of the source at 15 GHz, we propose a scenario in which the disc-corona interactions connect with the launching mechanism of the radio jet in this source.
description: 12 pages, 10 figures, accepted for publication in MNRAS
Supplementary document for Computationally-driven Discovery of Second Harmonic Generation in EuBa₃(B₃O₆)₃ Through Centrosymmetry Breaking - 6468480.pdf
Creators: name: He, Jingyang
name: Alaerts, Louis
name: Wang, Yu
name: Trinquet, Victor
name: Sanni, Victor
name: Claes, Romain
name: Katzbaer, Rowan
name: Krysko, Evan
name: Schaak, Raymond
name: Rignanese, Gian-Marco
Publisher: name: Optica Publishing Group
Year: 2025
Subjects: Uncategorized

description: SHG polarimetry to confirm the crystal space group
Nueva relacion y curioso romance, donde se refiere un prodigioso milagro que ha obrado la Virgen Santísima del Carmen: Digital Edition
Creators: name: Jacsont Pauline
Publisher: name: Zenodo
Year: 2024
Subjects: Spanish literature
Digital edition
XML-TEI

description: Digital edition of a Spanish pliego de cordel (19th c.). It contains the XML-TEI file of the edition, as well as the files that led to this edition, i.e. the digital facsimiles (raw and retouched), and the transcription produced by the OCR tool eScriptorium (ALTO-XML). This digital edition is a part of the research project Desenrollando el cordel / Untangling the cordel / Démêler le cordel (2020-2024), led by professor Constance Carta at the University of Geneva and supported by the philanthropic Sandoz-Monique de Meuron Family Foundation.
title: [Halle (Saale), Universitäts- und Landesbibliothek Sachsen-Anhalt, Pon Misc. 4° 91]
title: Kochbuch
titleType: AlternativeTitle
Creators: name: (:Unkn) Unknown
Publisher: name: Universitäts- und Landesbibliothek Sachsen-Anhalt
Year: 1701
Subjects: subject: Backbuch
subject: Kochbuch
subject: 090

description: Enthält Back- und Kochrezepte
Nueva relacion y curioso romance, donde se refiere un prodigioso milagro que ha obrado la Virgen Santísima del Carmen: Digital Edition
Creators: name: Jacsont Pauline
Publisher: name: Zenodo
Year: 2022
Subjects: Spanish literature
Digital edition
XML-TEI

description: Digital edition of a Spanish pliego de cordel (19th c.). It contains the XML-TEI file of the edition, as well as the files that led to this edition, i.e. the digital facsimiles (raw and retouched), and the transcription produced by the OCR tool e-Scriptorium (ALTO-XML). This digital edition is a part of the research project Desenrollando el cordel / Untangling the cordel / Démêler le cordel (2020-2024), led by the professor Constance Carta at the University of Geneva and supported by the philanthropic Sandoz-Monique de Meuron Family Foundation.
title: Are Hedge Funds a Hedge for Increasing Government Debt Issuance?
title: Les fonds de couverture : un filet pour l’augmentation des émissions d’obligations du gouvernement?
Creators: name: Epp, Adam
name: Gao, Jeffrey
Publisher: name: Bank of Canada
publisherIdentifier: https://ror.org/05cc98565
publisherIdentifierScheme: ROR
Year: 2025

description: This paper studies the rapid increase since 2019 of Government of Canada (GoC) debt issuance alongside greater hedge fund participation at GoC bond auctions. We find a systematic relationship between GoC debt stock and hedge fund bidding shares at auction. We attribute this to hedge funds’ business models, which are based on volume and leverage. We also use bid-level auction data and find that hedge funds are more willing than other investor types to buy bonds at lower auction yields (higher auction prices). These two results i) help explain why GoC auction performance has remained steady despite greater issuance and ii) affirm the importance of hedge funds in supporting Canada’s cost-effective debt distribution in recent years. In addition, we conduct a counterfactual analysis of the exit of hedge funds from auction, which further affirms the importance of hedge funds to GoC auction performance. However, the concentration of hedge funds represents a potential vulnerability because hedge funds have a greater flight risk relative to domestic real money investors and thus contribute to a potentially less stable investor base.
description: La présente étude s’intéresse à l’augmentation rapide des émissions d’obligations du gouvernement du Canada depuis 2019 ainsi qu’à la participation accrue des fonds de couverture aux adjudications visant ces titres. Nous constatons qu’il existe une relation systématique entre l’encours des obligations du gouvernement du Canada et la proportion des soumissions venant des fonds de couverture aux adjudications. Nous attribuons ce phénomène aux modèles d’affaires de ces fonds, qui sont basés sur le volume et l’effet de levier. Nous utilisons également des données des soumissions aux adjudications et constatons que les fonds de couverture sont plus disposés que d’autres types d’investisseurs à acheter des obligations à des rendements plus faibles à l’adjudication (prix d’adjudication plus élevés). Ces deux constats : i) contribuent à expliquer pourquoi les résultats des adjudications du gouvernement du Canada sont restés stables malgré l’augmentation des émissions; et ii) confirment l’importance des fonds de couverture dans la distribution économique des titres de dette du Canada au cours des dernières années. De plus, nous effectuons une analyse contrefactuelle de la fin de la participation des fonds de couverture aux adjudications, qui vient encore confirmer l’importance de ces fonds dans le succès des adjudications du gouvernement du Canada. Toutefois, la concentration des fonds de couverture représente une vulnérabilité potentielle, car ceux-ci sont plus à risque de cesser leur participation aux adjudications que les autres investisseurs institutionnels nationaux et contribuent donc à rendre le bassin d’investisseurs potentiellement moins stable.
Comparative Electron Irradiations of Amorphous and Crystalline Astrophysical Ice Analogues
Creators: name: Mifsud, Duncan V.
name: Hailey, Perry A.
name: Herczku, Péter
name: Sulik, Béla
name: Juhász, Zoltán
name: Kovács, Sándor T. S.
name: Kaňuchová, Zuzana
name: Ioppolo, Sergio
name: McCullough, Robert W.
name: Paripás, Béla
name: Mason, Nigel J.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: Other Condensed Matter (cond-mat.other)
subject: FOS: Physical sciences

description: Laboratory studies of the radiation chemistry occurring in astrophysical ices have demonstrated the dependence of this chemistry on a number of experimental parameters. One experimental parameter which has received significantly less attention is that of the phase of the solid ice under investigation. In this present study, we have performed systematic 2 keV electron irradiations of the amorphous and crystalline phases of pure CH3OH and N2O astrophysical ice analogues. Radiation-induced decay of these ices and the concomitant formation of products were monitored in situ using FT-IR spectroscopy. A direct comparison between the irradiated amorphous and crystalline CH3OH ices revealed a more rapid decay of the former compared to the latter. Interestingly, a significantly lesser difference was observed when comparing the decay rates of the amorphous and crystalline N2O ices. These observations have been rationalised in terms of the strength and extent of the intermolecular forces present in each ice. The strong and extensive hydrogen-bonding network that exists in crystalline CH3OH (but not in the amorphous phase) is suggested to significantly stabilise this phase against radiation-induced decay. Conversely, although alignment of the dipole moment of N2O is anticipated to be more extensive in the crystalline structure, its weak attractive potential does not significantly stabilise the crystalline phase against radiation-induced decay, hence explaining the smaller difference in decay rates between the amorphous and crystalline phases of N2O compared to those of CH3OH. Our results are relevant to the astrochemistry of interstellar ices and icy Solar System objects, which may experience phase changes due to thermally-induced crystallisation or space radiation-induced amorphisation.
description: Manuscript contains 18 pages, 6 figures, and 2 tables. Published as an advance article in PCCP
title: [Halle (Saale), Universitäts- und Landesbibliothek Sachsen-Anhalt, Pon Misc. 4° 92]
title: Joh. Sophia v. Ponickau: Kochbuch. 1697.
titleType: AlternativeTitle
Creators: name: (:Unkn) Unknown
Publisher: name: Universitäts- und Landesbibliothek Sachsen-Anhalt
Year: 1697
Subjects: subject: Backbuch
subject: Kochbuch
subject: Ponickau, Johanna Sophia von
subject: 090

description: Enthält Back- und Kochrezepte
[Halle (Saale), Universitäts- und Landesbibliothek Sachsen-Anhalt, 13 B 15]
Creators: name: (:Unkn) Unknown
Publisher: name: Universitäts- und Landesbibliothek Sachsen-Anhalt
Year: 1854
Subjects: subject: Backbuch
subject: Kochbuch
subject: 090

description: Enthält Back- und Kochrezepte
The impact of ultraviolet heating and cooling on the dynamics and observability of lava planet atmospheres
Creators: name: Nguyen, T. Giang
name: Cowan, Nicolas B.
name: Pierrehumbert, Raymond T.
name: Lupu, Roxana E.
name: Moores, John E.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: FOS: Physical sciences

description: Lava planets have non-global, condensible atmospheres similar to icy bodies within the solar system. Because they depend on interior dynamics, studying the atmospheres of lava planets can lead to understanding unique geological processes driven by their extreme environment. Models of lava planet atmospheres have thus far focused on either radiative transfer or hydrodynamics. In this study, we couple the two processes by introducing ultraviolet and infrared radiation to a turbulent boundary layer model. We also test the effect of different vertical temperature profiles on atmospheric dynamics. Results from the model show that UV radiation affects the atmosphere much more than IR. UV heating and cooling work together to produce a horizontally isothermal atmosphere away from the sub-stellar point regardless of the vertical temperature profile. We also find that stronger temperature inversions induce stronger winds and hence cool the atmosphere. Our simulated transmission spectra of the bound atmosphere show a strong SiO feature in the UV that would be challenging to observe in the planet's transit spectrum due to the precision required. Our simulated emission spectra are more promising, with significant SiO spectral features at 4.5 and 9 $μ$m that can be observed with the James Webb Space Telescope. Different vertical temperature profiles produce discernible dayside emission spectra, but not in the way one would expect.
description: Accepted to MNRAS
title: [Halle (Saale), Universitäts- und Landesbibliothek Sachsen-Anhalt, 17 A 22]
title: Kochbuch für Luise Nohl
titleType: AlternativeTitle
Creators: name: (:Unkn) Unknown
Publisher: name: Universitäts- und Landesbibliothek Sachsen-Anhalt
Year: 1851
Subjects: subject: Backbuch
subject: Kochbuch
subject: 090

description: Enthält ca. 200 Back- und Kochrezepte für einen großen Haushalt
Compact stellar model in higher torsion gravitational theory
Creators: name: Nashed, G. G. L.
name: Bamba, Kazuharu
Publisher: name: arXiv
Year: 2022
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: In this study, we address the issue of a spherically symmetrical interior solution to the quadratic form of $f\mathcal{(T)}=\mathcal{T}+ε\mathcal{T}^2$ gravitational theory using a physical tetrad that provides vanishing components of the off-components of the field equation, in contrast to what exists in the current literature. To be able to formulate the resulting differential equation in a closed form, we employ the Krori-Barua (KB) ansatz. Using the KB spacetime form, we derive the analytic form of the energy-density, radial, and tangential pressures and the anisotropic form. All of these quantities are affected by the dimensional parameter $ε$, which causes them to have a noted difference from those given in the frame of Einstein general relativity. The derived model of this study exhibits a non-trivial form of torsion scalar, and it also contains three constants that we drew from the matching of the boundary condition with a line element that also features a non-trivial form of torsion scalar. Having established the physical conditions that are needed for any real stellar, we check our model and show in detail that it bypasses all of these. Finally, we analyze the model's stability utilizing the Tolman-Oppenheimer-Volkoff equation and adiabatic index and show that our model satisfies these.
description: 17 Pages, 9 figures, 3 tables, Accepted in NPB. arXiv admin note: text overlap with arXiv:2010.06355
$ρ$ meson generalized parton distributions in the Nambu--Jona-Lasinio model
Creators: name: Zhang, Jin-Li
name: Kang, Guang-Zhen
name: Ping, Jia-Lun
Publisher: name: arXiv
Year: 2022
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: In this paper, both the unpolarized and the polarized $ρ$ meson generalized parton distributions are investigated in the framework of the Nambu--Jona-Lasinio model using proper time regularization scheme. The symmetry properties of $ρ$ meson generalized parton distributions are checked. The three independent distribution functions in deep inelastic scattering, $F_1(x)$, $b_1(x)$ and $g_1(x)$, and the Sachs-like charge, magnetic, and quadruple form factors $G_C(t)$, $G_M(t)$ and $G_Q(t)$, which are the first Mellin moments of unpolarized generalized parton distributions are obtained. In addition, the $u$ quark axial vector form factors $\tilde{F}_1^u(t)$ and $\tilde{F}_2^u(t)$ related to the axial currents from the polarized generalized parton distributions are studied. The impact parameter dependent parton distribution functions, which are the two-dimensional Fourier transform of generalized parton distributions are studied, too. The obtained $ρ$ meson generalized parton distributions satisfy the required properties well.
description: 15 pages, 29 figures, accepted for publication in PRD
Searching for flaring star-planet interactions in AU Mic TESS observations
Creators: name: Ilin, Ekaterina
name: Poppenhäger, Katja
Publisher: name: arXiv
Year: 2022
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: FOS: Physical sciences

description: Planets that closely orbit magnetically active stars are thought to be able to interact with their magnetic fields in a way that modulates stellar activity. This modulation in phase with the planetary orbit, such as enhanced X-ray activity, chromospheric spots, radio emission, or flares, is considered the clearest sign of magnetic star-planet interaction (SPI). However, the magnitude of this interaction is poorly constrained, and the intermittent nature of the interaction is a challenge for observers. AU Mic is an early M dwarf, and the most actively flaring planet host detected to date. Its innermost companion, AU Mic b, is a promising target for magnetic SPI observations. We used optical light curves of AU Mic obtained by the Transiting Exoplanet Survey Satellite to search for signs of flaring SPI with AU Mic b using a customized Anderson-Darling test. In the about $50$ days of observations, the flare distributions with orbital, rotational, and synodic periods were generally consistent with intrinsic stellar flaring. We found the strongest deviation ($p=0.07,\;n=71$) from intrinsic flaring with the orbital period of AU Mic b, in the high energy half of our sample ($ED>1$ s). If it reflects the true SPI signal from AU Mic b, extending the observing time by a factor of $2-3$ will yield a $>3σ$ detection. Continued monitoring of AU Mic may therefore reveal flaring SPI with orbital phase, while rotational modulation will smear out due to the star's strong differential rotation.
description: 9 pages, 4 figures. Accepted to MNRAS
Developing EOSC-Core components  to enable a FAIR EOSC ecosystem - Compliance Assessment Toolkit
Creators: name: Zamani, Themis
name: Hugo, Wim
Publisher: name: Zenodo
Year: 2024

description:  

The PID Policy and Implementation Task Force (PID TF) is dedicated to identify the gaps in the PID ecosystem that has been mentioned in the current SRIA version, especially to highlight mature and recognised PID infrastructures for emerging resource types, to standardise the PID graph, to integrate PIDs into FAIR data management, and to address PIDs and sensitive data (among others). It will provide different kinds of recommendations on PIDs management and will set up criteria and certification of PIDs.

The Compliance Assessment Toolkit will support the EOSC PID policy with services to encode, record, and query compliance with the policy. It delivers a conceptual model for assessment together with vocabularies, API services, and user interfaces whereby actors can assess compliance with PID policy applicable to their context.

Setting up a coordination mechanism for EOSC PID service providers

Ensuring end user needs are met when the EOSC PID landscape and solutions are developed

Ensuring alignment with EOSC policies and architecture of the PID infrastructures

Delivering support instruments for facilitating uptake (best practices, assessment toolkit, user documentation).
A Triple Star Origin For T Pyx and Other Short-Period Recurrent Novae
Creators: name: Knigge, C.
name: Toonen, S.
name: Boekholt, T. C. N.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: FOS: Physical sciences

description: Recurrent novae are star systems in which a massive white dwarf accretes material at such a high rate that it undergoes thermonuclear runaways every 1 - 100 years. They are the only class of novae in which the white dwarf can grow in mass, making some of these systems strong Type Ia supernova progenitor candidates. Almost all known recurrent novae are long-period (P_orb > 12 hrs) binary systems in which the requisite mass supply rate can be provided by an evolved (sub-)giant donor star. However, at least two recurrent novae are short-period (P_orb < 3 hrs) binaries in which mass transfer would normally be driven by gravitational radiation at rates 3-4 orders of magnitude smaller than required. Here, we show that the prototype of this class -- T Pyxidis -- has a distant proper motion companion and therefore likely evolved from a hierarchical triple star system. Triple evolution can naturally produce exotic compact binaries as a result of three-body dynamics, either by Kozai-Lidov eccentricity cycles in dynamically stable systems or via mass-loss-induced dynamical instabilities. By numerically evolving triple progenitors with physically reasonable parameters forward in time, we show explicitly that the inner binary can become so eccentric that mass transfer is triggered at periastron, driving the secondary out of thermal equilibrium. We suggest that short-period recurrent novae likely evolved via this extreme state, explaining their departure from standard binary evolution tracks.
description: 14 pages, 9 figures (5 main text + 4 in Appendices), accepted for publication in MNRAS
A sensitive search for water masers associated with star formation regions in the Local Group galaxy NGC 6822
Creators: name: Flanagan, C. J. P.
name: Ellingsen, S. P.
name: Cole, A. A.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We report the results of a sensitive search for water maser emission in the Local Group Galaxy NGC 6822 with the Karl G. Jansky Very Large Array. The observations provide tentative single-epoch detections of four candidates, associated with two infrared-bright star formation regions (Hubble I/III and Hubble IV). The candidate maser detections are all offset from the velocity range where strong emission from HI neutral gas is observed toward NGC 6822, with the closest offset by 40 kms$^{-1}$. Our observations include the location of NL1K, a previous tentative water maser detection in NGC 6822. We do not detect any emission from this location with a sensitivity limit approximately a factor of 5 better than the original Sardina Radio Telescope observations.
description: Accepted for publication by the Publications of the Astronomical Society of Australia: 8 pages, 7 figures
Lieb lattices formed by real atoms on Ag(111) and their lattice constant dependent electronic properties
Creators: name: Li, Xiaoxia
name: Li, Qili
name: Ji, Tongzhou
name: Yan, Ruige
name: Fan, Wenlin
name: Miao, Bingfeng
name: Sun, Liang
name: Chen, Gong
name: Zhang, Weiyi
name: Ding, Haifeng
Publisher: name: arXiv
Year: 2022
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Scanning tunneling microscopy is a powerful tool to build artificial atomic structures even not exist in nature but possess exotic properties. We here constructed Lieb lattices with different lattice constants by real atoms, i.e., Fe atoms on Ag(111) and probed their electronic properties. We find a surprising long-range effective electron wavefunction overlap between Fe adatoms as it exhibits a 1/r2-dependence with the interatomic distance r instead of the theoretically predicted exponential one. Combining control experiments, tight-binding and Green's function calculations, we attribute the observed long-range overlap to be enabled by the surface state. Our findings not only enrich the understanding of the electron wavefunction overlap, but also provide a convenient platform to design and explore the artificial structures and future devices with real atoms.
description: 11 pages, 3 figures
Novel quantum phase of the chromium spinel oxide HgCr$_{\rm 2}$O$_{\rm 4}$ in high magnetic fields
Creators: name: Kimura, Shojiro
name: Imajo, Shusaku
name: Gen, Masaki
name: Momoi, Tsutomu
name: Hagiwara, Masayuki
name: Ueda, Hiroaki
name: Kohama, Yoshimitsu
Publisher: name: arXiv
Year: 2022
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: In this study, we have performed the magnetocaloric effect and the specific heat measurements of chromium spinel oxide HgCr$_2$O$_4$, wherein the magnetic Cr$^{3+}$ ions form a highly frustrated pyrochlore lattice with significant spin-lattice coupling. In addition to the known magnetic-field-induced phases, our thermodynamic measurements detect a novel quantum phase just before the saturation of the magnetization, which has not been expected from the classical theories of the pyrochlore lattice antiferromagnet with spin-lattice coupling. Based on recent theoretical model calculation, we discuss the possibility of a spin nematic state appearing for this quantum phase.
description: 14 pages, 4 figures
A first look at the submillimeter Sun with ALMA
Creators: name: Alissandrakis, C. E.
name: Bastian, T. S.
name: Nindos, A.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: We present the first full-disk solar images obtained with the Atacama Large Millimeter/submillimeter Array (ALMA) in Band 7 (0.86 mm; 347 GHz). In spite of the low spatial resolution (21"), several interesting results were obtained. During our observation, the sun was practically devoid of active regions. Quiet Sun structures on the disk are similar to those in Atmospheric Imaging Assembly (AIA) images at 1600 A and 304 A, after the latter are smoothed to the ALMA resolution, as noted previously for Band 6 (1.26 mm) and Band 3 (3 mm) images; they are also similar to negative H$α$ images of equivalent resolution. Polar coronal holes, which are clearly seen in the 304 A band and small H$α$ filaments, are not detectable at 0.86 mm. We computed the center-to-limb variation (CLV) of the brightness temperature, $T_b$, in Band 7, as well as in Bands 6 and 3, which were obtained during the same campaign, and we combined them to a unique curve of $T_b(\logμ_{100})$, where $μ_{100}$ is the cosine of the heliocentric angle reduced to 100 GHz. Assuming that the absolute calibration of the Band 3 commissioning observations is accurate, we deduced a brightness temperature at the center of the disk of 6085 K for Band 7, instead of the value of 5500 K, extrapolated from the recommended values for Bands 3 and 6. More importantly, the $T_b(\logμ_{100})$ curve flattens at large values of $μ_{100}$, and so does the corresponding $T_e(\logτ_{100})$ at large $τ_{100}$. This is probably an indication that we are approaching the temperature minimum.
description: Astronomy and Astrophysics, accepted
Asymptotic Normality for Plug-in Estimators of Generalized Shannon's Entropy
Creators: name: Zhang, Jialin
name: Shi, Jingyi
Publisher: name: arXiv
Year: 2022
Subjects: subject: Statistics Theory (math.ST)
subject: Information Theory (cs.IT)
subject: FOS: Mathematics
subject: FOS: Computer and information sciences

description: Shannon's entropy is one of the building blocks of information theory and an essential aspect of Machine Learning methods (e.g., Random Forests). Yet, it is only finitely defined for distributions with fast decaying tails on a countable alphabet. The unboundedness of Shannon's entropy over the general class of all distributions on an alphabet prevents its potential utility from being fully realized. To fill the void in the foundation of information theory, Zhang (2020) proposed generalized Shannon's entropy, which is finitely defined everywhere. The plug-in estimator, adopted in almost all entropy-based ML method packages, is one of the most popular approaches to estimating Shannon's entropy. The asymptotic distribution for Shannon's entropy's plug-in estimator was well studied in the existing literature. This paper studies the asymptotic properties for the plug-in estimator of generalized Shannon's entropy on countable alphabets. The developed asymptotic properties require no assumptions on the original distribution. The proposed asymptotic properties allow interval estimation and statistical tests with generalized Shannon's entropy.
A fractional Anderson model
Creators: name: Molina, Mario I.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: Pattern Formation and Solitons (nlin.PS)
subject: FOS: Physical sciences

description: We examine the interplay between disorder and fractionality in a one-dimensional tight-binding Anderson model. In the absence of disorder, we observe that the two lowest energy eigenvalues detach themselves from the bottom of the band, as fractionality $s$ is decreased, becoming completely degenerate at $s=0$, with a common energy equal to a half bandwidth, $V$. The remaining $N-2$ states become completely degenerate forming a flat band with energy equal to a bandwidth, $2V$. Thus, a gap is formed between the ground state and the band. In the presence of disorder and for a fixed disorder width, a decrease in $s$ reduces the width of the point spectrum while for a fixed $s$, an increase in disorder increases the width of the spectrum. For all disorder widths, the average participation ratio decreases with $s$ showing a tendency towards localization. However, the average mean square displacement (MSD) shows a hump at low $s$ values, signaling the presence of a population of extended states, in agreement with what is found in long-range hopping models.
description: 6 pages, 5 figures
Universality in the two-dimensional dilute Baxter-Wu model
Creators: name: Vasilopoulos, Alexandros
name: Fytas, Nikolaos G.
name: Vatansever, Erol
name: Malakis, Anastasios
name: Weigel, Martin
Publisher: name: arXiv
Year: 2022
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: We study the question of universality in the two-dimensional spin-$1$ Baxter-Wu model in the presence of a crystal field $Δ$. We employ extensive numerical simulations of two types, providing us with complementary results: Wang-Landau sampling at fixed values of $Δ$ and a parallelized variant of the multicanonical approach performed at constant temperature $T$. A detailed finite-size scaling analysis in the regime of second-order phase transitions in the $(Δ, T)$ phase diagram indicates that the transition belongs to the universality class of the $4$-state Potts model. Previous controversies with respect to the nature of the transition are discussed and possibly attributed to the presence of strong finite-size effects, especially as one approaches the pentacritical point of the model.
description: 10 pages, 12 figures, 1 table, version to be published in Phys. Rev. E
Mesoscopic Möbius ladder lattices as non-Hermitian model systems
Creators: name: Ryu, Jung-Wan
name: Hentschel, Martina
Publisher: name: arXiv
Year: 2022
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: While classic quantum chaos originated from the idea to set into context nonlinear physics and Hermitian quantum mechanics, non-Hermitian models have enhanced the field in recent years. At the same time, low-dimensional effective matrix models have proven to be a powerful tool in accessing the physical properties of a system in a semiquantitative manner. Here, we focus on two realizations of non-Hermitian physics in mesoscopic systems. First, we consider spiral optical microcavities in which the asymmetric scattering between whispering gallery modes induces the non-Hermitian behaviour. Second, for parity-time (PT) symmetric ladder lattices we compare circular and Möbius geometries. We find the effective coupling between even and odd parity modes to be symmetric but complex in a microscopically derived 2 x 2 matrix model, resulting in non-Hermitian behaviour as well. Most importantly, the Möbius topology acts like a scatterer that induces a qualitatively new form of (avoided) level crossing - a PT-broken phase terminated by exceptional points - resulting from the symmetric but non-Hermitian coupling.
description: 16 pages, 6 figures
Quantifying Respiratory Conditions Within N95 Masks:  A Multivariable Assessment of Oxygen, CO2, Humidity,  Temperature, and Pressure
Creators: name: James, Cole
name: Luo, Ming
Publisher: name: Zenodo
Year: 2025

description: Published in NRT-LEAD Annual Expo-2025 Booklet.
description: This study investigates the impact of wearing an N95 mask on various environmental factors, specifically oxygen concentration, CO2 concentration, humidity, pressure, and temperature. A custom 3D-printed mount houses sensors for real-time monitoring of these variables both when the mask is worn and when it is not. Data is collected during varying levels of physical exertion, such as resting and exercising, to assess how these factors change under different conditions. The primary aim of this research is to explore the relationship between these environmental factors and the reported discomfort associated with prolonged N95 mask use. Initial findings suggest that humidity levels show a significant increase when wearing the mask, which could contribute to the discomfort often reported by users. Other factors, including oxygen concentration and CO2 levels, have not shown substantial differences between the masked and unmasked states. Based on these results, the study proposes a potential solution to enhance wearer comfort: introducing cool oxygen into the mask to lower humidity and provide facial cooling. This intervention may mitigate discomfort during extended use, particularly in environments requiring prolonged mask-wearing, such as healthcare settings. This research offers valuable insights into the sensory experiences of N95 mask users and suggests potential improvements to mask design for better comfort.
Improved Limit on Tensor Currents in the Weak Interaction from $^8$Li $β$ Decay
Creators: name: Burkey, M. T.
name: Savard, G.
name: Gallant, A. T.
name: Scielzo, N. D.
name: Hirsh, T. Y.
name: Varriano, L.
name: Sargsyan, G. H.
name: Launey, K. D.
name: Brodeur, M.
name: Burdette, D. P.
name: Heckmaier, E.
name: Joerres, K.
name: Klimes, J. W.
name: Kolos, K.
name: Laminack, A.
name: Leach, K. G.
name: Levand, A. F.
name: Longfellow, B.
name: Maaß, B.
name: Marley, S. T.
name: Morgan, G. E.
name: Mueller, P.
name: Orford, R.
name: Padgett, S. W.
name: Galván, A. Pérez
name: Pierce, J. R.
name: Ray, D.
name: Segel, R.
name: Siegl, K.
name: Sharma, K. S.
name: Wang, B. S.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Nuclear Experiment (nucl-ex)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: The electroweak interaction in the Standard Model (SM) is described by a pure vector-axial-vector structure, though any Lorentz-invariant component could contribute. In this work, we present the most precise measurement of tensor currents in the low-energy regime by examining the $β$-$\barν$ correlation of trapped $^{8}$Li ions with the Beta-decay Paul Trap. We find $a_{βν} = -0.3325 \pm 0.0013_{stat} \pm 0.0019_{syst}$ at $1σ$ for the case of coupling to right-handed neutrinos $(C_T=-C_T')$, which is consistent with the SM prediction.
description: 6 pages, 3 figures, 1 table
Barjols, atelier Fabre, fabrication du tambourin, perçage des trous pour la fixation des anneaux entre lesquels une lanière de cuir sera passée
Creators: name: Musée National Des Arts Et Traditions Populaires (Paris)
name: Centre D'ethnologie Française
Publisher: name: École des Hautes Études en Sciences Sociales; Institut  interdisciplinaire d'anthropologie du contemporain (Paris); Laboratoire d'anthropologie et d'histoire de l'institution de la culture (Paris)
Year: 2024

Abstract
Contract contingency in vertically related markets
Creators: name: Bacchiega, Emanuele
name: Bonroy, Oliver
name: Petrakis, Emmanuel
Publisher: name: Alma Mater Studiorum - Università di Bologna
Year: 2016
Subjects: SECS-P/01 Economia politica

description: We study the optimal contract choice of an upstream monopolist producing an essential input that may sell to two vertically differentiated downstream firms. The upstream supplier can offer an exclusive contract to one of the firms or non-exclusive contracts to both firms. Each of the latter can be made contingent or not on the breakdown of the negotiations between the upstream supplier and the rival downstream firm. The distribution of bargaining power during the contract terms negotiations is the main driving force of the monopolist's choices. A powerful supplier always opts for an exclusive contract. By contrast, a weaker supplier offers non-exclusive contracts and makes each of them contingent or non-contingent such as to guarantee the most favorable outside option in its negotiations. Our main results hold under an horizontally differentiated downstream market too.
Sommaire de la revue Annales du patrimoine numéro 20-2020
Creators: name: Abbassa, Mohammed
Publisher: name: figshare
Year: 2024
Subjects: classificationCode: 470501
subject: African literature
classificationCode: 470507
subject: Comparative and transnational literature
classificationCode: 470513
subject: Latin and classical Greek literature
classificationCode: 470514
subject: Literary theory
classificationCode: 470516
subject: Literature in French

description: Revue Annales du patrimoine faculté des lettres et des arts, université de Mostaganem, numéro 20-2020
Thermal and thermoelectric properties of an antiferromagnetic topological insulator MnBi$_2$Te$_4$
Creators: name: Zhang, H.
name: Xu, C. Q.
name: Lee, S. H.
name: Mao, Z. Q.
name: Ke, X.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: The discovery of an intrinsic antiferromagnetic topological insulator (AFM-TI) in MnBi$_2$Te$_4$ has attracted intense attention, most of which lies on its electrical properties. In this paper, we report electronic, thermal, and thermoelectric transport studies of this newly found AFM-TI. The temperature and magnetic field dependence of its resistivity, thermal conductivity, and Seebeck coefficient indicate strong coupling between charge, lattice, and spin degrees of freedom in this system. Furthermore, MnBi$_2$Te$_4$ exhibits a large anomalous Nernst signal, which is associated with non-zero Berry curvature of the field-induced canted antiferromagnetic state.
description: submitted in Oct. 2021, accepted for publication in Phys. Rev. B