cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
A vertical inertial sensor with interferometric readout
Creators: name: Kranzhoff, S. L.
name: Lehmann, J.
name: Kirchhoff, R.
name: Carlassara, M.
name: Cooper, S. J.
name: Koch, P.
name: Leavey, S.
name: Lueck, H.
name: Mow-Lowry, C. M.
name: Woehler, J.
name: von Wrangel, J.
name: Wu, D. S.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Instrumentation and Detectors (physics.ins-det)
subject: FOS: Physical sciences

description: High precision interferometers such as gravitational-wave detectors require complex seismic isolation systems in order to decouple the experiment from unwanted ground motion. Improved inertial sensors for active isolation potentially enhance the sensitivity of existing and future gravitational-wave detectors, especially below 30 Hz, and thereby increase the range of detectable astrophysical signals. This paper presents a vertical inertial sensor which senses the relative motion between an inertial test mass suspended by a blade spring and a seismically isolated platform. An interferometric readout was used which introduces low sensing noise, and preserves a large dynamic range due to fringe-counting. The expected sensitivity is comparable to other state-of-the-art interferometric inertial sensors and reaches values of $10^{-10}\,\text{m}/\sqrt{\text{Hz}}$ at 100 mHz and $10^{-12}\,\text{m}/\sqrt{\text{Hz}}$ at 1 Hz. The potential sensitivity improvement compared to commercial L-4C geophones is shown to be about two orders of magnitude at 10 mHz and 100 mHz and one order of magnitude at 1 Hz. The noise performance is expected to be limited by thermal noise of the inertial test mass suspension below 10 Hz. Further performance limitations of the sensor, such as tilt-to-vertical coupling from a non-perfect levelling of the test mass and nonlinearities in the interferometric readout, are also quantified and discussed.
Nucleation of colloids and macromolecules: does the nucleation pathway matter?
Creators: name: Lutsko, James F.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Chemical Physics (physics.chem-ph)
subject: FOS: Physical sciences

description: A recent description of diffusion-limited nucleation based on fluctuating hydrodynamics that extends classical nucleation theory predicts a very non-classical two-step scenario whereby nucleation is most likely to occur in spatially-extended, low-amplitude density fluctuations. In this paper, it is shown how the formalism can be used to determine the maximum probability of observing \emph{any} proposed nucleation pathway, thus allowing one to address the question as to their relative likelihood, including of the newly proposed pathway compared to classical scenarios. Calculations are presented for the nucleation of high-concentration bubbles in a low-concentration solution of globular proteins and it is found that the relative probabilities (new theory compared to classical result) for reaching a critical nucleus containing $N_c$ molecules scales as $e^{-N_c/3}$ thus indicating that for all but the smallest nuclei, the classical scenario is extremely unlikely.
description: 7 pages, 5 figures
Sine-square deformed mean-field theory
Creators: name: Kawano, Masataka
name: Hotta, Chisa
Publisher: name: arXiv
Year: 2023
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We develop a theory that accurately evaluates quantum phases with any large-scale emergent structures including incommensurate density waves or topological textures without {\it a priori} knowing their periodicity. We spatially deform a real-space mean-field Hamiltonian on a finite-size cluster using a sine-squared envelope function with zero energy at system edges. The wave functions become insensitive to the misfit of the lattice and ordering periods. We successfully extract the ordering wave vectors by our deformed Fourier transformation, updating the previous results for hole-doped and spin-orbit coupled Mott insulators. The method further enables the evaluation of a charge gap beyond the mean-field level.
description: 7 pages, 4 figures
Frequency multiplication with toroidal mode number of kink/fishbone modes on a static HL-2A-like tokamak
Creators: name: Zou, Zhihui
name: Zhu, Ping
name: Kim, Charlson C.
name: Deng, Wei
name: Wang, Xianqu
name: Hou, Yawei
Publisher: name: arXiv
Year: 2022
Subjects: subject: Plasma Physics (physics.plasm-ph)
subject: FOS: Physical sciences

description: In the presence of energetic particles (EPs), the Long-Lived Mode (LLM) frequency multiplication with n = 1,2,3 or higher is often observed on HL-2A, where n is the toroidal mode number. Hybrid kinetic-MHD model simulations of the energetic particle (EP) driven kink/fishbone modes on a static HL-2A-like tokamak using NIMROD code find that, when the background plasma pressure is relatively high, and the EP pressure and the beam energy are relatively low, the mode frequency increases almost linearly with EP pressure, and the frequency is proportional to n ("frequency multiplication"), even in absence of any equilibrium plasma rotation. In addition, the frequency multiplication persists as the safety factor at magnetic axis q0 varies. In absence of EPs, the growth rate of the 1/1 mode is the largest; however, as the EP pressure increases, the growth rate of 2/2 modes or 3/3 modes becomes dominant, suggesting that the higher-n modes are more vulnerable to EPs. These results may shed light on the understanding about the toroidal mode number dependence of kink/fishbone modes in the advanced scenarios of tokamaks with weak or reversed central magnetic shear.
description: 28 pages, 13 figures
D1.2 System Architecture Definition
Creators: name: Srdjan Skrbic
Publisher: name: Zenodo
Year: 2021
Subjects: Artificial Intelligence & Decision support; Information Security Technologies; Automation; Industrial Internet of Things (IIoT); Industry4.0; manufacturing; edge-tocloud security; hardware-enabled security; machine learning; blockchain; behavioral analysis; accountability; trustworthiness

description: This deliverable provides a specification of the conceptual architecture of the COLLABS platform. The COLLABS project aims at developing, demonstrating and supporting a comprehensive cyberintelligence framework for collaborative manufacturing, which enables the secure data exchange across the digital supply chain while providing high degree of resilience, reliability, accountability,
 trustworthiness, and addresses threat prevention, detection, mitigation, and real-time response. These goals will be achieved using state-of-the-art technologies and making significant scientific and technological advances in several key relevant domains, including secure multi-party computations and homomorphic encryption, distributed deep learning and anomaly detection, distributed ledger technologies (blockchain) and smart contracts, and distributed remote software attestation. The specification of the architecture is based on a detailed analysis of reference architectures, state-of the- art literature review, end-user requirement
 analysis, as well as general non-functional requirements and best practices.
Gravitational Waves-Tomography of Low-Scale-Leptogenesis
Creators: name: Datta, Satyabrata
name: Samanta, Rome
Publisher: name: arXiv
Year: 2022
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: A long-lived scalar field ($Φ$) which couples weakly to the right-handed (RH) neutrinos ($N_{Ri}$), generates small RH neutrino masses ($M_i$) in Low-Scale-Leptogenesis (LSL) mechanisms, despite having a large vacuum expectation value $v_Φ$. In this case, the correlation shared by the $M_i$s and the duration of the non-standard cosmic history driven by the $Φ$ provides an excellent opportunity to study LSL signatures on primordial gravitational waves (GWs). We find it engaging, specifically for the gravitational waves that originate due to the inflationary blue-tilted tensor power spectrum and propagate through the non-standard cosmic epoch. Depending on $M_i$, broadly, the scenario has two significant consequences. First, if LSL is at play, GWs with a sizeable blue tilt do not contradict the Big-Bang-Nucleosynthesis (BBN) bound even for the post-inflationary models with very high-scale reheating. Second, it opens up a possibility to probe LSLs via a low-frequency and a complementary high-frequency measurement of GW-spectral shapes which are typically double-peaked. For a case study, we consider the recent results on GWs from the Pulsar-Timing-Arrays (PTAs) as a `measurement' at the low frequencies and forecast the signatures of LSL mechanisms at the higher frequencies.
description: 23 pages, 9 figures, LIGO bound on SGWB updated. Matches the JHEP version
Ferromagnetic properties of charged vector bosons condensate in the early universe
Creators: name: Piccinelli, Gabriella
Publisher: name: arXiv
Year: 2011
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: Bose-Einstein condensation in the early universe is considered. The magnetic properties of a condensate of charged vector bosons are studied, showing that a ferromagnetic state is formed. As a consequence, the primeval plasma may be spontaneously magnetized inside macroscopically large domains and primordial magnetic fields can be generated.
description: 4 pages IAU Symposium 274, 6-10 September 2010, Giardini Naxos, Italy; Published in Proceedings of the International Astronomical Union, 2011, Advances in Plasma Astrophysics, A. Bonanno, E. de Gouveia Dal Pino & A. Kosovichev, eds., Cambridge Univerity Press
A result on s-semipermutable subgroups of finite groups and some applications
Creators: name: Aseeri, Fawaz
name: Kaspczyk, Julian
Publisher: name: arXiv
Year: 2022
Subjects: subject: Group Theory (math.GR)
subject: FOS: Mathematics

description: Let $p$ be a prime number, $G$ be a $p$-solvable finite group and $P$ be a Sylow $p$-subgroup of $G$. We prove that $G$ is $p$-supersolvable if $N_G(P)$ is $p$-supersolvable and if there is a subgroup $H$ of $P$ with $P' \le H \le Φ(P)$ such that $H$ is $s$-semipermutable in $G$. As applications, we simplify the proofs of some known results and also generalize some known results.
description: 9 pages. Corrected typos
On a Class of Binary Matrices
Creators: name: Yordzhev, Krasimir
Publisher: name: arXiv
Year: 2012
Subjects: subject: Combinatorics (math.CO)
subject: FOS: Mathematics

description: The paper studies the set of all square binary matrices containing an exact number of 1's in each rows and in each column. A connection is established between the cardinal number of this set and the cardinal number of its subset of matrices containing 1 in the lower right corner. With the help of this result a new proof is advanced of the I. Good and J. Grook theorem. In connection with the firs result a classification has also been made of square binary matrices containing three 1's in each row and column and 1 in the lower right corner.
description: 7 pages
Chaotic heteroclinic networks as models of switching behavior in biological systems
Creators: name: Morrison, Megan
name: Young, Lai-Sang
Publisher: name: arXiv
Year: 2022
Subjects: subject: Dynamical Systems (math.DS)
subject: Chaotic Dynamics (nlin.CD)
subject: FOS: Mathematics
subject: FOS: Physical sciences
subject: 37N25 (Primary) 37C29, 37D45 (Secondary)

description: Key features of biological activity can often be captured by transitions between a finite number of semi-stable states that correspond to behaviors or decisions. We present here a broad class of dynamical systems that are ideal for modeling such activity. The models we propose are chaotic heteroclinic networks with nontrivial intersections of stable and unstable manifolds. Due to the sensitive dependence on initial conditions, transitions between states are seemingly random. Dwell times, exit distributions, and other transition statistics can be built into the model through geometric design and can be controlled by tunable parameters. To test our model's ability to simulate realistic biological phenomena, we turned to one of the most studied organisms, {\it C. elegans}, well known for its limited behavioral states. We reconstructed experimental data from two laboratories, demonstrating the model's ability to quantitatively reproduce dwell times and transition statistics under a variety of conditions. Stochastic switching between dominant states in complex dynamical systems has been extensively studied and is often modeled as Markov chains. As an alternative, we propose here a new paradigm, namely chaotic heteroclinic networks generated by deterministic rules (without the necessity for noise). Chaotic heteroclinic networks can be used to model systems with arbitrary architecture and size without a commensurate increase in phase dimension. They are highly flexible and able to capture a wide range of transition characteristics that can be adjusted through control parameters.
description: 17 pages, 6 figures
Decaying dark matter: a stacking analysis of galaxy clusters to improve on current limits
Creators: name: Combet, C.
name: Maurin, D.
name: Nezri, E.
name: Pointecouteau, E.
name: Hinton, J. A.
name: White, R.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We show that a stacking approach to galaxy clusters can improve current limits on decaying dark matter by a factor $\gtrsim 5-100$, with respect to a single source analysis, for all-sky instruments such as Fermi-LAT. Based on the largest sample of X-ray-selected galaxy clusters available to date (the MCXC meta-catalogue), we provide all the astrophysical information, in particular the astrophysical term for decaying dark matter, required to perform an analysis with current instruments.
description: 6 pages, 3 figures, supplementary file available on demand, accepted for publication in PRD
Konrad Strauss, Die Geschichte der Töpferkunst vom Mittelalter bis zur Neuzeit und die Kunsttöpfereien in Alt-Livland (Estland und Lettland)
Creators: name: Woeckel, Gerhard Paulus
Publisher: name: Kunstchronik. Monatsschrift für Kunstwissenschaft, Museumswesen und Denkmalpflege
Year: 2020

description: Rezension zu: Konrad Strauss, Die Geschichte der Töpferkunst vom Mittelalter bis zur Neuzeit und die Kunsttöpfereien in Alt-Livland (Estland und Lettland). P. H. Heitz-Verlag. Basel 1969. 272 S. mit 2 Abb. im Text, 148 Abb. auf Taf.
description: Kunstchronik. Monatsschrift für Kunstwissenschaft, Museumswesen und Denkmalpflege, Bd. 26 Nr. 4 (1973): Kunstchronik. Monatsschrift für Kunstwissenschaft, Museumswesen und Denkmalpflege
New combinatorial proofs for enumeration problems and random anchored structures
Creators: name: Haupt, Alexander
Publisher: name: TUHH Universitätsbibliothek
Year: 2021
Subjects: subject: combinatorial proofs
subject: bijective proofs
subject: selbergs integral formula
subject: domino towers
subject: rook paths
subject: anchored random structures
classificationCode: 500
subject: Naturwissenschaften
classificationCode: 510
subject: Mathematik

description: Wir finden einen kombinatorischen Beweis der Selbergschen Integralformel, welches eine Frage von Stanley beantwortet. Dann zählen wir S-omino-Türme bijektiv ab. Auch berechnen wir die erzeugende Funktion von reihenkonvexen k-omino-Türmen. Anschließend zählen wir Rundwege auf einem Schachbrett, die ein Turm ablaufen kann, bijektiv ab. Zuletzt beschäftigen wir uns mit einer probabilistischen Version eines kombinatorischen Problems von Freedman.
description: This thesis is divided into four parts. We present a combinatorial proof of Selberg's integral formula, which answers a question posed by Stanley. In the second part we enumerate S-omino towers bijectively. We also calculate the generating function of row-convex k-omino towers. In the third part we enumerate walks a rook can move along on a chess board. Finally, we study a new probabilistic version of a combinatorial problem posed by Freedman.
Gamillscheg, Ernst. Romania Germanica. Sprach- und Siedlungsgeschichte der Germanen aus dem Boden des alten Römerreiches
Creators: name: Jacob-Friesen, Karl Hermann
Publisher: name: Nachrichten aus Niedersachsens Urgeschichte
Year: 2020

description: Rezension zu: Gamillscheg, Ernst. Romania Germanica. Sprach- und Siedlungsgeschichte der Germanen aus dem Boden des alten Römerreiches. Bd. III. Die Burgunder. Grundriß der Germanischen Philologie II/3. 8°, 252 Seiten mit 3 Karten. Berlin und Leipzig 1936, Verlag Walter de Gruyter
description: Nachrichten aus Niedersachsens Urgeschichte, Bd. 10 (1936): Nachrichten aus Niedersachsens Urgeschichte
How to train your solver: Verification of boundary conditions for smoothed particle hydrodynamics
Creators: name: Negi, Pawan
name: Ramachandran, Prabhu
Publisher: name: arXiv
Year: 2022
Subjects: subject: Numerical Analysis (math.NA)
subject: Computational Physics (physics.comp-ph)
subject: FOS: Mathematics
subject: FOS: Physical sciences

description: The weakly compressible smoothed particle hydrodynamics (WCSPH) method has been employed to simulate various physical phenomena involving fluids and solids. Various methods have been proposed to implement the solid wall, inlet/outlet, and other boundary conditions. However, error estimation and the formal rates of convergence for these methods have not been discussed or examined carefully. In this paper, we use the method of manufactured solution (MMS) to verify the convergence properties of a variety of commonly employed of various solid, inlet, and outlet boundary implementations. In order to perform this study, we propose various manufactured solutions for different domains. On the basis of the convergence offered by these methods, we systematically propose a convergent WCSPH scheme along with suitable methods for implementing the boundary conditions. We also demonstrate the accuracy of the proposed scheme by using it to solve the flow past a circular cylinder. Along with other recent developments in the use of adaptive resolution, this paves the way for accurate and efficient simulation of incompressible or weakly-compressible fluid flows using the SPH method.
Hermann Kienast, Die Stadtmauer von Samons
Creators: name: Schwandner, Ernst-Ludwig
Publisher: name: Bonner Jahrbücher
Year: 2020

description: Rezension zu: Hermann Kienast, Die Stadtmauer von Samons. Samos 15. Rudolf Habelt Verlag GmbH, Bonn 1978. XII und 106 Seiten, 50 Abbildungen, 40 Tafeln und 1 Gesamtplan.
description: Bonner Jahrbücher, Bd. 182.1982: Bonner Jahrbücher
Variability in X-ray induced effects in [Rh(COD)Cl]2 with changing experimental parameters
Creators: name: Fernando, Nathalie K.
name: Boström, Hanna L. B.
name: Murray, Claire A.
name: Owen, Robin L.
name: Thompson, Amber L.
name: Dickerson, Joshua L.
name: Garman, Elspeth F.
name: Cairns, Andrew B.
name: Regoutz, Anna
Publisher: name: arXiv
Year: 2022
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: X-ray characterisation methods have undoubtedly enabled cutting-edge advances in all aspects of materials research. Despite the enormous breadth of information that can be extracted from these techniques, the challenge of radiation-induced sample change and damage remains prevalent. This is largely due to the emergence of modern, high-intensity X-ray source technologies and growing potential to carry out more complex, longer duration in-situ or in-operando studies. The tunability of synchrotron beamlines enables the routine application of photon energy-dependent experiments. This work explores the structural stability of [Rh(COD)Cl]2, a widely used catalyst and precursor in the chemical industry, across a range of beamline parameters that target X-ray energies of 8 keV, 15 keV, 18 keV and 25 keV, on a powder X-ray diffraction synchrotron beamline at room temperature. Structural changes are discussed with respect to absorbed X-ray dose at each experimental setting associated with the respective photon energy. In addition, the X-ray radiation hardness of the catalyst is discussed, by utilising the diffraction data at the different energies to determine a dose limit, which is often considered in protein crystallography and typically overlooked in small molecule crystallography. This work not only gives fundamental insight into how damage manifests in this organometallic catalyst, but will encourage careful consideration of experimental X-ray parameters before conducting diffraction on similar radiation-sensitive organometallic materials.
description: 20 pages, 7 figures
Spin-dependent Seebeck coefficients of Ni_{80}Fe_{20} and Co in nanopillar spin valves
Creators: name: Dejene, F. K.
name: Flipse, J.
name: van Wees, B. J.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We have experimentally determined the spin-dependent Seebeck coefficient of permalloy (Ni_{80}Fe_{20}) and cobalt (Co) using nanopillar spin valve devices. The devices were specifically designed to completely separate heat related effects from charge related effects. A pure heat current through the nanopillar spin valve, a stack of two ferromagnetic layers (F) separated by a non-magnetic layer (N), leads to a thermovoltage proportional to the spin-dependent Seebeck coefficient S_{S}=S_{\uparrow}-S_{\downarrow} of the ferromagnet, where S_{\uparrow} and S_{\downarrow} are the Seebeck coefficient for spin-up and spin-down electrons. By using a three-dimensional finite-element model (3D-FEM) based on spin-dependent thermoelectric theory, whose input material parameters were measured in separate devices, we were able to accurately determine a spin-dependent Seebeck coefficient of -1.8 microvolt/Kelvin and -4.5 microvolt/Kelvin for cobalt and permalloy, respectively corresponding to a Seebeck coefficient polarization P_{S}=S_{S}/S_{F} of 0.08 and 0.25, where S_{F} is the Seebeck coefficient of the ferromagnet. The results are in agreement with earlier theoretical work in Co/Cu multilayers and spin-dependent Seebeck and spin-dependent Peltier measurements in Ni_{80}Fe_{20}/Cu spin valve structures.
One-Loop Effective Action Approach to Quantum MHV Theory
Creators: name: Kakkad, Hiren
name: Kotko, Piotr
name: Stasto, Anna
Publisher: name: arXiv
Year: 2022
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: It is well known that the MHV action, i.e. the action containing all the maximally helicity violating vertices, is alone not sufficient for loop computations. In order to develop loop contributions systematically and to ensure that there are no missing terms, we propose to formulate the quantum MHV action via one-loop effective action approach. The quadratic field fluctuations in the light cone Yang-Mills theory are explicitly integrated, followed by the classical canonical field transformation. We test the approach by calculating one loop $(++++)$ and $(+++-)$ amplitudes, i.e. amplitudes that cannot be calculated from ordinary MHV action. Such an approach can be further used to unambiguously define loop corrections in other theories related to Yang-Mills theory by field transformations.
description: 31 pages, 22 figures
Dynamically Reconfigurable Variable-precision Sparse-Dense Matrix Acceleration in Tensorflow Lite
Creators: name: Nunez-Yanez, Jose
name: Otero, Andres
name: de la Torre, Eduardo
Publisher: name: arXiv
Year: 2023
Subjects: subject: Hardware Architecture (cs.AR)
subject: Artificial Intelligence (cs.AI)
subject: FOS: Computer and information sciences

description: In this paper, we present a dynamically reconfigurable hardware accelerator called FADES (Fused Architecture for DEnse and Sparse matrices). The FADES design offers multiple configuration options that trade off parallelism and complexity using a dataflow model to create four stages that read, compute, scale and write results. FADES is mapped to the programmable logic (PL) and integrated with the TensorFlow Lite inference engine running on the processing system (PS) of a heterogeneous SoC device. The accelerator is used to compute the tensor operations, while the dynamically reconfigurable approach can be used to switch precision between int8 and float modes. This dynamic reconfiguration enables better performance by allowing more cores to be mapped to the resource-constrained device and lower power consumption compared with supporting both arithmetic precisions simultaneously. We compare the proposed hardware with a high-performance systolic architecture for dense matrices obtaining 25% better performance in dense mode with half the DSP blocks in the same technology. In sparse mode, we show that the core can outperform dense mode even at low sparsity levels, and a single-core achieves up to 20x acceleration over the software-optimized NEON RUY library.
Zu Gläsern mit hohem Stiel oder Fuß des 13. und 14. Jahrhunderts
Creators: name: Baumgartner, Erwin
name: Krüger, Ingeborg
Publisher: name: Bonner Jahrbücher
Year: 2020

description: Bonner Jahrbücher, Bd. 185.1985: Bonner Jahrbücher
A universally valid Heisenberg uncertainty relation
Creators: name: Fujikawa, Kazuo
Publisher: name: arXiv
Year: 2012
Subjects: subject: Quantum Physics (quant-ph)
subject: High Energy Physics - Theory (hep-th)
subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: A universally valid Heisenberg uncertainty relation is proposed by combining the universally valid error-disturbance uncertainty relation of Ozawa with the relation of Robertson. This form of the uncertainty relation, which is defined with the same mathematical rigor as the relations of Kennard and Robertson, incorporates both of the intrinsic quantum fluctuations and measurement effects.
description: 7 pages
The Euler-Heisenberg Lagrangian beyond one loop
Creators: name: Huet, Idrish
name: de Traubenberg, Michel Rausch
name: Schubert, Christian
Publisher: name: arXiv
Year: 2011
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We review what is presently known about higher loop corrections to the Euler-Heisenberg Lagrangian and its Scalar QED analogue. The use of those corrections as a tool for the study of the properties of the QED perturbation series is outlined. As a further step in a long-term effort to prove or disprove the convergence of the N photon amplitudes in the quenched approximation, we present a parameter integral representation of the three-loop Euler-Heisenberg Lagrangian in 1+1 dimensional QED, obtained in the worldline formalism.
description: 11 pages, 2 figures, talk given by Christian Schubert at QFEXT11, Benasque, Spain, Sept. 18-24, 2011, to appear in the conference proceedings
Room-temperature emission of muonium from aerogel and zeolite targets
Creators: name: Antognini, A.
name: Crivelli, P.
name: Gerchow, L.
name: Hume, T. D.
name: Kirch, K.
name: Knecht, A.
name: Nuber, J.
name: Papa, A.
name: Ritjoho, N.
name: Sakurai, M.
name: Soter, A.
name: Taqqu, D.
name: Vogiatzi, S. M.
name: Zhang, J.
name: Ziegler, L.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Atomic Physics (physics.atom-ph)
subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: A low-emittance, high-intensity atomic beam of muonium ($\mathrm{M}=μ^+ + \mathrm{e}^-$) using superfluid helium as muon-to-muonium converter is being developed at the Paul Scherrer Institute (PSI). This beam could advance laser spectroscopy of muonium and allow the first atomic interferometry experiments for the direct observation of the M gravitational interaction. In this paper, we describe the development of compact detection schemes which resulted in the background-suppressed observation of atomic muonium in vacuum, and can be adapted for cryogenic measurements. Using these setups, we compared the emission characteristics of various muonium production targets using low momentum ($p_μ = 11$-$13~$MeV/c) muons, and observed muonium emission from zeolite targets into vacuum for the first time. For a specific laser-ablated aerogel target, we determined a muon-to-vacuum-muonium conversion efficiency of $7.23 \pm 0.05 \text{(stat)} ^{+1.06}_{-0.76}\text{(sys)}\,\text{%}$, assuming thermal emission of muonium. Moreover, we investigated muonium-helium collisions and from it we determined an upper temperature limit of 0.3 K for the superfluid helium converter.
Regularity properties of distributions through sequences of functions
Creators: name: Pilipovic, Stevan
name: Scarpalezos, Dimitris
name: Vindas, Jasson
Publisher: name: arXiv
Year: 2012
Subjects: subject: Functional Analysis (math.FA)
subject: FOS: Mathematics
subject: Primary 26A16, 26B35, 46F10, 46F30. Secondary 26A12, 46E15, 46F05

description: We give necessary and sufficient criteria for a distribution to be smooth or uniformly Hölder continuous in terms of approximation sequences by smooth functions; in particular, in terms of those arising as regularizations $(T\astϕ_{n})$.
description: 10 pages
Intra-Batch Supervision for Panoptic Segmentation on High-Resolution Images
Creators: name: de Geus, Daan
name: Dubbelman, Gijs
Publisher: name: arXiv
Year: 2023
Subjects: subject: Computer Vision and Pattern Recognition (cs.CV)
subject: FOS: Computer and information sciences

description: Unified panoptic segmentation methods are achieving state-of-the-art results on several datasets. To achieve these results on high-resolution datasets, these methods apply crop-based training. In this work, we find that, although crop-based training is advantageous in general, it also has a harmful side-effect. Specifically, it limits the ability of unified networks to discriminate between large object instances, causing them to make predictions that are confused between multiple instances. To solve this, we propose Intra-Batch Supervision (IBS), which improves a network's ability to discriminate between instances by introducing additional supervision using multiple images from the same batch. We show that, with our IBS, we successfully address the confusion problem and consistently improve the performance of unified networks. For the high-resolution Cityscapes and Mapillary Vistas datasets, we achieve improvements of up to +2.5 on the Panoptic Quality for thing classes, and even more considerable gains of up to +5.8 on both the pixel accuracy and pixel precision, which we identify as better metrics to capture the confusion problem.
description: WACV 2023. Project page and code: https://ddegeus.github.io/intra-batch-supervision/
Characterisation of a Thin Fully Depleted SOI Pixel Sensor with High Momentum Charged Particles
Creators: name: Battaglia, Marco
name: Bisello, Dario
name: Contarato, Devis
name: Denes, Peter
name: Giubilato, Piero
name: Mattiazzo, Serena
name: Pantano, Devis
Publisher: name: arXiv
Year: 2012
Subjects: subject: Instrumentation and Detectors (physics.ins-det)
subject: FOS: Physical sciences

description: This paper presents the results of the characterisation of a thin, fully depleted pixel sensor manufactured in SOI technology on high-resistivity substrate with high momentum charged particles. The sensor is thinned to 70 $μ$m and a thin phosphor layer contact is implanted on the back-plane. Its response is compared to that of thick sensors of same design in terms of signal and noise, detection efficiency and single point resolution based on data collected with 300 GeV pions at the CERN SPS. We observe that the charge collected and the signal-to-noise ratio scale according to the estimated thickness of the sensitive volume and the efficiency and single point resolution of the thinned chip are comparable to those measured for the thick sensors.
description: 8 pages, 3 figures, submitted to Nucl. Instr. and Meth., section A
Probleme der Küstenforschung im südlichen Nordseegebiet 14
Creators: name: Hingst, Hans
Publisher: name: Bonner Jahrbücher
Year: 2020

description: Rezension zu: Probleme der Küstenforschung im südlichen Nordseegebiet 14. Herausgegeben vom Niedersächsischen Landesinstitut für Marschen- und Wurtenforschung, Wilhelmshaven. Verlag August Lax, Hildesheim 1982. 157 Seiten, 37 Abbildungen, 65 Tafeln, 20 Tabellen und 1 Kartenbeilage.
description: Bonner Jahrbücher, Bd. 185.1985: Bonner Jahrbücher
Scaling of the $^{19}$B two-neutron halo properties close to unitarity
Creators: name: Hiyama, Emiko
name: Lazauskas, Rimantas
name: Carbonell, Jaume
name: Frederico, Tobias
Publisher: name: arXiv
Year: 2022
Subjects: subject: Nuclear Theory (nucl-th)
subject: Nuclear Experiment (nucl-ex)
subject: FOS: Physical sciences

description: We explore the description of the bound $^{19}$B isotope in terms of a $^{17}$B+n+n three-body system where the two-body subsystems $^{17}$B+n and neutron-neutron (nn) have virtual states close to the continuum. Dimensionless scaling functions for the root-mean-square (rms) radii are defined and studied for different parameters of the neutron-core potential and considering three different models for neutron-neutron interaction. The scaling functions for the radii are rooted on the universal behavior of three-body systems close to the Efimov limit and depend only on dimensionless quantities formed by the two-neutron separation energies and scattering lengths. Our results show in practice the model independence of these scaling functions close to unitarity. We provide an estimation of the different rms relative separation distances between the constituents, as well as of the proton and matter radii.
description: 9 pages, 7 figures
Absorption spectroscopy of gamma-ray burst afterglows: probing the GRB line of sight
Creators: name: D'Elia, V.
Publisher: name: arXiv
Year: 2011
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: GRB absorption spectroscopy opened up a new window in the study of the high redshift Universe, especially with the launch of the Swift satellite and the quick and precise localization of the afterglow. Eight-meter class telescopes can be repointed within a few hours from the GRB, enabling the acquisition of high signal-to-noise ratio and high resolution afterglow spectra. In this paper I will give a short review of what we learned through this technique, and I will present some of the first results obtained with the X-shooter spectrograph.
description: 6 pages, 4 eps figures, proceeding of the workshop "The first year of science with X-shooter", Como (Italy), October 19-22, 2010
Planar approximation for spin transfer systems with application to tilted polarizer devices
Creators: name: Bazaliy, Ya. B.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Planar spin-transfer devices with dominating easy-plane anisotropy can be described by an effective one-dimensional equation for the in-plane angle. Such a description provides an intuitive qualitative understanding of the magnetic dynamics. We give a detailed derivation of the effective planar equation and use it to describe magnetic switching in devices with tilted polarizer.
description: 9 pages
A simple method to estimate radial velocity variations due to stellar activity using photometry
Creators: name: Aigrain, S.
name: Pont, F.
name: Zucker, S.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: We present a new, simple method to predict activity-induced radial velocity variations using high-precision time-series photometry. It is based on insights from a simple spot model, has only two free parameters (one of which can be estimated from the light curve) and does not require knowledge of the stellar rotation period. We test the method on simulated data and illustrate its performance by applying it to MOST/SOPHIE observations of the planet host-star HD189733, where it gives almost identical results to much more sophisticated, but highly degenerate models, and synthetic data for the Sun, where we demonstrate that it can reproduce variations well below the m/s level. We also apply it to Quarter 1 data for Kepler transit candidate host stars, where it can be used to estimate RV variations down to the 2-3m/s level, and show that RV amplitudes above that level may be expected for approximately two thirds of the candidates we examined.
description: 13 pages, 10 figures, accepted for publication in MNRAS
Preservation file formats Curation LCRDM/UKB day 2023
Creators: name: V. Gilissen
Publisher: name: Zenodo
Year: 2023
Subjects: file formats
curation

description: Preservation Preferences: file formats curation As a general guideline, DANS believes that the file formats best suited for long-term sustainability and accessibility: •are frequently used •have open specifications •are independent of specific software, developers or vendors
Solid flow drives surface nanopatterning by ion-beam irradiation
Creators: name: Castro, M.
name: Gago, R.
name: Vázquez, L.
name: Muñoz-García, J.
name: Cuerno, R.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Fluid Dynamics (physics.flu-dyn)
subject: FOS: Physical sciences

description: Ion Beam Sputtering (IBS) is known to produce surface nanopatterns over macroscopic areas on a wide range of materials. However, in spite of the technological potential of this route to nanostructuring, the physical process by which these surfaces self-organize remains poorly under- stood. We have performed detailed experiments of IBS on Si substrates that validate dynamical and morphological predictions from a hydrodynamic description of the phenomenon. Our results elucidate flow of a nanoscopically thin and highly viscous surface layer, driven by the stress created by the ion-beam, as a description of the system. This type of slow relaxation is akin to flow of macroscopic solids like glaciers or lead pipes, that is driven by defect dynamics.
description: 12 pages, 4 figures
Hierarchy of RG flows in 6d $(1,0)$ orbi-instantons
Creators: name: Fazzi, Marco
name: Giri, Suvendu
Publisher: name: arXiv
Year: 2022
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: $N$ M5-branes probing the intersection between the orbifold $\mathbb{C}^2/Γ_\text{ADE}$ and an $E_8$ wall give rise to 6d $(1,0)$ SCFTs known as ADE-type orbi-instantons. At fixed $N$ and order of the orbifold, each element of $\text{Hom}(Γ_\text{ADE},E_8)$ defines a different SCFT. The SCFTs are connected by Higgs branch RG flows, which generically reduce the flavor symmetry of the UV fixed point. We determine the full hierarchy of these RG flows for type A, i.e. $\mathbb{C}^2/\mathbb{Z}_k$, for any value of $N$ and $k$. The hierarchy takes the form of an intricate Hasse diagram: each node represents an IR orbi-instanton (homomorphism), and each edge an allowed flow, compatibly with the 6d $a$-theorem. The partial order is defined via quiver subtraction of the 3d magnetic quivers associated with the 6d SCFTs, which is equivalent to performing a so-called Kraft-Procesi transition between homomorphisms.
description: v2: typos fixed, references added, improved discussion in section 3.3, version published in JHEP; v1: Part I of a series of papers; 49+31 pages; 25 figures (hi-res figures can be downloaded from the arXiv submission source)
First Detection of the Molecular Cloud Population in the Extended Ultraviolet (XUV) Disk of M83
Creators: name: Koda, Jin
name: Watson, Linda
name: Combes, Francoise
name: Rubio, Monica
name: Boissier, Samuel
name: Yagi, Masafumi
name: Thilker, David
name: Lee, Amanda M
name: Komiyama, Yutaka
name: Morokuma-Matsui, Kana
name: Verdugo, Celia
Publisher: name: arXiv
Year: 2022
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We report a CO(3-2) detection of 23 molecular clouds in the extended ultraviolet (XUV) disk of the spiral galaxy M83 with ALMA. The observed 1kpc^2 region is at about 1.24 times the optical radius (R25) of the disk, where CO(2-1) was previously not detected. The detection and non-detection, as well as the level of star formation (SF) activity in the region, can be explained consistently if the clouds have the mass distribution common among Galactic clouds, such as Orion A -- with star-forming dense clumps embedded in thick layers of bulk molecular gas, but in a low-metallicity regime where their outer layers are CO-deficient and CO-dark. The cloud and clump masses, estimated from CO(3-2), range from 8.2x10^2 to 2.3x10^4 Msun and from 2.7x10^2 to 7.5x10^3 Msun, respectively. The most massive clouds appear similar to Orion A in star formation activity as well as in mass, as expected if the cloud mass structure is universal. The overall low SF activity in the XUV disk could be due to the relative shortage of gas in the molecular phase. The clouds are distributed like chains up to 600 pc (or longer) in length, suggesting that the trigger of cloud formation is on large scales. The universal cloud mass structure also justifies the use of high-J CO transitions to trace the total gas mass of clouds, or galaxies, even in the high-z universe. This study is the first demonstration that CO(3-2) is an efficient tracer of molecular clouds even in low-metallicity environments.
description: Accepted for AAS Journals
Novel features for the detection of bearing faults in railway vehicles
Creators: name: Kreuzer, Matthias
name: Schmidt, Alexander
name: Kellermann, Walter
Publisher: name: arXiv
Year: 2023
Subjects: subject: Audio and Speech Processing (eess.AS)
subject: Machine Learning (cs.LG)
subject: Sound (cs.SD)
subject: FOS: Electrical engineering, electronic engineering, information engineering
subject: FOS: Computer and information sciences

description: {In this paper, we address the challenging problem of detecting bearing faults from vibration signals. For this, several time- and frequency-domain features have been proposed already in the past. However, these features are usually evaluated on data originating from relatively simple scenarios and a significant performance loss can be observed if more realistic scenarios are considered. To overcome this, we introduce Mel-Frequency Cepstral Coefficients (MFCCs) and features extracted from the Amplitude Modulation Spectrogram (AMS) as features for the detection of bearing faults. Both AMS and MFCCs were originally introduced in the context of audio signal processing but it is demonstrated that a significantly improved classification performance can be obtained by using these features. Furthermore, to tackle the characteristic data imbalance problem in the context of bearing fault detection, i.e., typically much more data from healthy bearings than from damaged bearings is available, we propose to train a One-class \ac{SVM} with data from healthy bearings only. Bearing faults are then classified by the detection of outliers. Our approach is evaluated with data measured in a highly challenging scenario comprising a state-of-the-art commuter railway engine which is supplied by an industrial power converter and coupled to a load machine.
description: Accepted at Inter-Noise 2021
The Tully-Fisher Relation for 25,000 SDSS Galaxies as Function of Environment
Creators: name: Mocz, Philip
name: Green, Andrew
name: Malacari, Max
name: Glazebrook, Karl
Publisher: name: arXiv
Year: 2012
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: We construct Tully-Fisher relationships (TFRs) in the $u$, $g$, $r$, $i$ and $z$ bands and stellar mass TFRs (smTFRs) for a sample of $25,698$ late spiral type galaxies (with $0.0450.045$) the fibres sample enough of the disc to obtain a linear relationship between $v_{\rm FWHM}$ and $v_{\rm circ}$, allowing us to obtain a TFR and to investigate dependence on other variables. We also develop a methodology for distinguishing between astrophysical and sample bias in the fibre TFR trends. We observe the well-known steepening of the TFR in redder bands in our sample. We divide the sample of galaxies into four equal groups using projected neighbour density ($Σ$) quartiles and find no significant dependence on environment, extending previous work to a wider range of environments and a much larger sample. Having demonstrated that we can construct SDSS-based TFRs is very useful for future applications because of the large sample size available.
description: accepted for publication in MNRAS. 15 pages, 12 figures
Constraining Sterile Neutrino Dark Matter in the Milky Way Halo with Swift-XRT
Creators: name: Sicilian, Dominic
name: Lopez, Dannell
name: Moscetti, Massimo
name: Bulbul, Esra
name: Cappelluti, Nico
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 present a search for sterile neutrino dark matter decay signals in the Milky Way's dark matter halo by considering the entirety of the Swift-XRT data archive. After filtering the raw archive, we analyze a $\sim$77 Ms data set containing the full field of view, as well as a $\sim$41 Ms data set with point-sources excised using the Swift-XRT Point Source catalog. We report non-detections of emission lines across the 3--6 keV continuum in both data sets, including at and around 3.5 keV. The point-sources excised data set is found to have higher sensitivity to faint dark matter decay signals due to its freedom from point-source contamination and is thus used to set constraints. Non-detections across the total data set's continuum are used to constrain the sterile neutrino dark matter parameter space, marginally strengthening existing X-ray constraints. Non-detections at $\sim$3.5 keV in data subsets grouped by angular distance from the galactic center are used to constrain the 3.5 keV line's galactic intensity profile, providing the strongest constraints to date across $\sim$1/4 of the galaxy.
description: 8 pages, 4 figures, submitted to ApJ
On a fractional Nirenberg problem, part I: blow up analysis and compactness of solutions
Creators: name: Jin, Tianling
name: Li, YanYan
name: Xiong, Jingang
Publisher: name: arXiv
Year: 2011
Subjects: subject: Analysis of PDEs (math.AP)
subject: FOS: Mathematics

description: We prove some results on the existence and compactness of solutions of a fractional Nirenberg problem.
description: 59 pages
The Glauber-Ising chain under low-temperature protocols
Creators: name: Godrèche, Claude
name: Luck, Jean-Marc
Publisher: name: arXiv
Year: 2022
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Probability (math.PR)
subject: FOS: Physical sciences
subject: FOS: Mathematics

description: This work is devoted to an in-depth analysis of arbitrary temperature protocols applied to the ferromagnetic Glauber-Ising chain launched from a disordered initial state and evolving in the low-temperature scaling regime. We focus our study on the density of domain walls and the reduced susceptibility. Both the inverse of the former observable and the latter one provide two independent measures of the typical size of the growing ferromagnetic domains. Their product is thus a dimensionless form factor characterising the pattern of growing ordered domains and providing a measure of the distance of the system to thermal equilibrium. We apply this framework to a variety of protocols: everlasting slow quenches, where temperature decreases continuously to zero in the limit of infinitely long times, slow quenches of finite duration, where temperature reaches zero at some long but finite quenching time, time-periodic protocols with weak and strong modulations, and the two-temperature protocol leading to the memory effect found by Kovacs.
description: 35 pages, 11 figures