cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
NFDI4Earth Service Catalogue and Gap Analysis
Creators: name: Müller, Claudia M.
name: Frickenhaus, Stephan
Publisher: name: Zenodo
Year: 2023
Subjects: NFDI
NFDI4Earth
NFDI4Earth Deliverable
NFDI4Earth Task Area 3
NFDI4Earth 2Interoperate

description: This document, in its first part, aims at providing preliminary results from the evaluation of the NFDI4Earth Service Catalogue. This involves the characterisation of the different service types, and shows typical examples of services in Earth System Science. The second part of the document focuses on the identification of gaps regarding FAIRness, and missing services with the means of interviews and surveys. The envisioned target group of this documentation is mainly the NFDI4Earth service providers.
description: This work has been funded by the German Research Foundation (DFG) through the project NFDI4Earth (DFG project no.460036893, https://www.nfdi4earth.de/) within the German National Research Data Infrastructure (NFDI, https://www.nfdi.de/).
Polymer Entanglement Dynamics: Role of Attractive Interactions
Creators: name: Grest, Gary S.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: FOS: Physical sciences

description: The coupled dynamics of entangled polymers which span a broad time and length scales govern the unique viscoelastic properties of polymers. To follow chain mobility by numerical simulations from the intermediate Rouse and reptation regimes to the late time diffusive regime, highly coarse grained models with purely repulsive interactions between monomers are widely used since they are computationally the most efficient. Here using large scale molecular dynamics simulations the effect of including the attractive interaction between monomers on the dynamics of entangled polymers melts is explored for the first time over wide temperature range. Attractive interactions has little effect on the local packing for all temperatures T and on the chain mobility for T higher than about twice the glass transition Tg. These results, across a broad range of molecular weight, show that to study the dynamics of entangled polymers melts the interactions can be treated as pure repulsive, confirming a posteriori the validity of previous studies and opening the way to new large scale numerical simulations.
description: 11 Pages, 5 Figures; Journal of Chemical Physics (accepted)
Multi-wavelength Study of Transition Region Penumbral Subarcsecond Bright Dots Using IRIS and NST
Creators: name: Deng, Na
name: Yurchyshyn, Vasyl
name: Tian, Hui
name: Kleint, Lucia
name: Liu, Chang
name: Xu, Yan
name: Wang, Haimin
Publisher: name: arXiv
Year: 2016
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: Using high-resolution transition region (TR) observations taken by the Interface Region Imaging Spectrograph (IRIS) mission, Tian et al. (2014b) revealed numerous short-lived subarcsecond bright dots (BDs) above sunspots (mostly located in the penumbrae), which indicate yet unexplained small-scale energy releases. Moreover, whether these subarcsecond TR brightenings have any signature in the lower atmosphere and how they are formed are still not fully resolved. This paper presents a multi-wavelength study of the TR penumbral BDs using a coordinated observation of a near disk-center sunspot with IRIS and the 1.6 m New Solar Telescope (NST) at the Big Bear Solar Observatory. NST provides high-resolution chromospheric and photospheric observations with narrow-band H-alpha imaging spectroscopy and broad-band TiO images, respectively, complementary to IRIS TR observations. A total of 2692 TR penumbral BDs are identified from a 37-minute time series of IRIS 1400 A slitjaw images. Their locations tend to be associated more with downflowing and darker fibrils in the chromosphere, and weakly associated with bright penumbral features in the photosphere. However, temporal evolution analyses of the BDs show that there is no consistent and convincing brightening response in the chromosphere. These results are compatible with a formation mechanism of the TR penumbral BDs by falling plasma from coronal heights along more vertical and dense magnetic loops. The BDs may also be produced by small-scale impulsive magnetic reconnection taking place sufficiently high in the atmosphere that has no energy release in the chromosphere.
description: 8 pages, 5 figures, accepted to ApJ
Bow Ties in the Sky I: The Angular Structure of Inverse Compton Gamma-ray Halos in the Fermi Sky
Creators: name: Broderick, Avery E.
name: Tiede, Paul
name: Shalaby, Mohamad
name: Pfrommer, Christoph
name: Puchwein, Ewald
name: Chang, Philip
name: Lamberts, Astrid
Publisher: name: arXiv
Year: 2016
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: Extended inverse Compton halos are generally anticipated around extragalactic sources of gamma rays with energies above 100 GeV. These result from inverse Compton scattered cosmic microwave background photons by a population of high-energy electron/positron pairs produced by the annihilation of the high-energy gamma rays on the infrared background. Despite the observed attenuation of the high-energy gamma rays, the halo emission has yet to be directly detected. Here, we demonstrate that in most cases these halos are expected to be highly anisotropic, distributing the up-scattered gamma rays along axes defined either by the radio jets of the sources or oriented perpendicular to a global magnetic field. We present a pedagogical derivation of the angular structure in the inverse Compton halo and provide an analytic formalism that facilitates the generation of mock images. We discuss exploiting this fact for the purpose of detecting gamma-ray halos in a set of companion papers.
description: Accepted by ApJ, 18 pages, 17 figures, 13 pages in appendix
Lefschetz-thimble approach to the Silver Blaze problem of one-site fermion model
Creators: name: Tanizaki, Yuya
name: Hidaka, Yoshimasa
name: Hayata, Tomoya
Publisher: name: arXiv
Year: 2016
Subjects: subject: High Energy Physics - Lattice (hep-lat)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: The sign problem of finite-density QCD at the zero temperature becomes very severe if the quark chemical potential exceeds half of the pion mass. In order to understand its property, we consider the sign problem of the one-site fermion model appearing in its path-integral expression by using the Lefschetz-thimble method. We show that the original integration cycle becomes decomposed into multiple Lefschetz thimbles at a certain value of the fermion chemical potential, which would correspond to half of the pion mass of finite-density QCD. This triggers a fictitious phase transition on each Lefschetz thimble, and the interference of complex phases among them plays an important role for the correct description of the system. We also show that the complex Langevin method does not work in this situation.
description: 7 pages, 3 figures, Proceedings for the 34th annual International Symposium on Lattice Field Theory, 24-30 July 2016, University of Southampton, UK
Analyse zum Dichtverhalten von rotierenden Radial-Wellendichtringen
Creators: name: Pelzer, Veith
Publisher: name: Hannover : Institutionelles Repositorium der Leibniz Universität Hannover
Year: 2022
Subjects: subject: pumping effect
subject: dynamic radial force measurement
subject: lift-off speeds
subject: seal friction
subject: rotating seals
subject: rotierende Dichtringe
subject: Abhebedrehzahlen
subject: Förderwert
subject: Radialkraftmessung
subject: Dichtungsreibung
subject: Dewey Decimal Classification::600 | Technik::620 | Ingenieurwissenschaften und Maschinenbau

description: Dichtungen gehören zu den wichtigsten und am häufigsten gebrauchten Maschinenelementen in technischen Anlagen. Sie sind essenziell für den zuverlässigen und sicheren Betrieb. Diese Ausarbeitung widmet sich der Anwendung von Standard-RWDR als rotierende Dichtungen. Rotierende Radial-Wellendichtringe stellen einerseits eine Herausforderung dar, da die Gefahr von Leckage beim Abheben der Dichtkante von der Gegenlauffläche besteht. Andererseits kann genau dieser Effekt nutzbringend eingesetzt werden, um die Dichtkante bei hohen Drehzahlen gezielt zu entlasten und somit eine thermische Überbeanspruchung zu vermeiden. Dabei werden Fragen zu Einsatzgrenzen und Prüfmethoden mit der Ausprägung des Rückfördereffekts verbunden, bevor durch Reibungs- und Radialkraftmessungen zusammen mit einem analytischen Berechnungsansatz die Abschätzung der kritischen Drehzahlen vorgestellt und das Potenzial der Reibungsminderung rotierender Dichtungen bei gleichzeitig bestehender Dichtsicherheit aufgezeigt wird.
description: Seals are among the most important and most frequently used machine elements in technical systems. They are essential for reliable and safe machine operation. But although sealing technology is a key technology with solutions for countless applications, there are still gaps in knowledge for a variety of options that modern sealing technology offers users to make products and systems operate more efficiently and reliably. Such a knowledge gap is the subject of this work. Specifically, the application of standard rotary shaft seals as rotating seals was investigated. On the one hand rotating radial shaft seals pose a challenge, as there is a risk of leakage when lifting off due to the centrifugal force. On the other hand, this effect can be used in order to relieve the sealing edge at high speeds and thus avoid thermal overload. Questions about application limits and test methods are linked to the pumping effect, an estimation of the critical speeds using friction and radial force measurements together with an analytical calculation method is introduced, and the potential for reducing the friction of rotating seals while maintaining sealing reliability is shown.
Applying Adomian Decomposition Method to Solve Burgess Equation with a Non-linear Source
Creators: name: Gonzalez-Gaxiola, O.
name: Bernal-Jaquez, R.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Tissues and Organs (q-bio.TO)
subject: FOS: Biological sciences
subject: 35K57, 35A25, 92B05

description: In the present work we consider the mathematical model that describes brain tumour growth (glioblastomas) under medical treatment. Based on the medical study presented by R. Stupp et al. (New Engl Journal of Med 352: 987-996, 2005) which evidence that, combined therapies such as, radiotherapy and chemotherapy, produces negative tumour-growth, and using the mathematical model of P. K. Burgess et al. (J Neuropath and Exp Neur 56: 704-713, 1997) as an starting point, we present a model for tumour growth under medical treatment represented by a non-linear partial differential equation that is solved using the Adomian Decomposition Method (ADM). It is also shown that the non-linear term efficiently models the effects of the combined therapies. By means of a proper use of parameters, this model could be used for calculating doses in radiotherapy and chemotherapy.
description: Manuscript with 6 figures, Int. J. Appl. Comput. Math 2015
OPERAS Innovation Lab: Stimulating Innovation in Social Sciences and Humanities
Creators: name: Holsinger, Sy
name: Umerle, Tomasz
Publisher: name: Zenodo
Year: 2023
Subjects: OPERAS
OPERAS-GER
National Node
Innovation Lab

description: In the forum, Sy and Tomasz presented the OPERAS Innovation Lab. The goal is to implement repeatable and sustainable innovation processes to ensure innovation culture within OPERAS and foster innovative solutions for Open Scholarly Communication in SSH. To do so, the OPERAS Innovation Lab will interface with the OPERAS Community, OPERAS Bodies and the Open Science Community as a whole, including Industry. The forum was held during the final event of the German National Node OPERAS-GER , titled "Connecting the Connections - Abschlussveranstaltung des Projekts OPERAS-GER" on the 5th of September 2023 in Bonn.
Anisotropic cubic curvature couplings
Creators: name: Bailey, Quentin G.
Publisher: name: arXiv
Year: 2016
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: To complement recent work on tests of spacetime symmetry in gravity, cubic curvature couplings are studied using an effective field theory description of spacetime-symmetry breaking. The associated mass dimension 8 coefficients for Lorentz violation studied do not result in any linearized gravity modifications and instead are revealed in the first nonlinear terms in an expansion of spacetime around a flat background. We consider effects on gravitational radiation through the energy loss of a binary system and we study two-body orbital perturbations using the post-Newtonian metric. Some effects depend on the internal structure of the source and test bodies, thereby breaking the Weak Equivalence Principle for self-gravitating bodies. These coefficients can be measured in solar-system tests, while binary-pulsar systems and short-range gravity tests are particularly sensitive.
description: 11 pages
Hyperon Physics at BESIII
Creators: name: Yunlong Xiao
Publisher: name: Zenodo
Year: 2023

description: The quantum entangled hyperon and anti-hyperon pairs from $J/\psi$ and $\psi(3686)$ events taken by the BESIII detector are used to study the fundamental $CP$ symmetry via the non-leptonic two-body weak decays. All decay parameters can be determined simultaneously due to the non-zero relative phases of the form factors $\Delta\Phi$. By comparing the decay parameters of hyperon and anti-hyperon, precise tests of direct $CP$ violation can be performed. The results of $CP$ asymmetry for hyperon are consistent with $CP$ conservation and are agreement with the standard model prediction within the current uncertainties.
Faint Submillimeter Galaxies identified through their optical/near-infrared colours I: spatial clustering and halo masses
Creators: name: Chen, Chian-Chou
name: Smail, Ian
name: Swinbank, A. M.
name: Simpson, James M.
name: Almaini, Omar
name: Conselice, Christopher J.
name: Hartley, Will G.
name: Mortlock, Alice
name: Simpson, Chris
name: Wilkinson, Aaron
Publisher: name: arXiv
Year: 2016
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: The properties of submillimeter galaxies (SMGs) that are fainter than the confusion limit of blank-field single-dish surveys ($S_{850} \lesssim$ 2 mJy) are poorly constrained. Using a newly developed color selection technique, Optical-Infrared Triple Color (OIRTC), that has been shown to successfully {select} such faint SMGs, we identify a sample of 2938 OIRTC-selected galaxies, dubbed Triple Color Galaxies (TCGs), in the UKIDSS-UDS field. We show that these galaxies have a median 850 $μ$m flux of S$_{850} = 0.96\pm0.04$ mJy (equivalent to a star-formation rate SFR $\sim60-100$ M$_\odot$ yr$^{-1}$ based on SED fitting), representing the first large sample of faint SMGs that bridges the gap between bright SMGs and normal star-forming galaxies in S$_{850}$ and $L_{\rm IR}$. We assess the basic properties of TCGs and their relationship with other galaxy populations at $z\sim2$. We measure the two-point autocorrelation function for this population and derive a typical halo mass of log$_{10}$(M$_{\rm halo}$) $=12.9^{+0.2}_{-0.3}$, $12.7^{+0.1}_{-0.2}$, and $12.9^{+0.2}_{-0.3}$ $h^{-1}$M$_\odot$ at $z=1-2$, $2-3$, and $3-5$, respectively. Together with the bright SMGs (S$_{850} \gtrsim 2$ mJy) and a comparison sample of less far-infrared luminous star-forming galaxies, we find a lack of dependence between spatial clustering and S$_{850}$ (or SFR), suggesting that the difference between these populations may lie in their local galactic environment. Lastly, on the scale of $\sim8-17$ kpc at $1
description: ApJ in press, 13 pages, 11 figures
Generalized diffusion equation with fractional derivatives within Renyi statistics
Creators: name: Kostrobij, P.
name: Markovych, B.
name: Viznovych, O.
name: Tokarchuk, M.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: By using the Zubarev nonequilibrium statistical operator method, and the Liouville equation with fractional derivatives, a generalized diffusion equation with fractional derivatives is obtained within the Renyi statistics. Averaging in generalized diffusion coefficient is performed with a power distribution with the Renyi parameter $q$.
description: 12 pages
A WENO-based Method of Line Transpose Approach for Vlasov Simulations
Creators: name: Christlieb, Andrew
name: Guo, Wei
name: Jiang, Yan
Publisher: name: arXiv
Year: 2016
Subjects: subject: Numerical Analysis (math.NA)
subject: FOS: Mathematics

description: In this paper, a high order implicit Method of Line Transpose (MOL$^T$ ) method based on a weighted essentially non-oscillatory (WENO) methodology is developed for one-dimensional linear transport equations and further applied to the Vlasov-Poisson (VP) simulations via dimensional splitting. In the MOL$^T$ framework, the time variable is first discretized by a diagonally implicit strong-stability-preserving Runge-Kutta method, resulting in a boundary value problem (BVP) at the discrete time levels. Then an integral formulation coupled with a high order WENO methodology is employed to solve the BVP. As a result, the proposed scheme is high order accurate in both space and time and free of oscillations even though the solution is discontinuous or has sharp gradients. Moreover, the scheme is able to take larger time step evolution compared with an explicit MOL WENO scheme with the same order of accuracy. The desired positivity-preserving (PP) property of the scheme is further attained by incorporating a newly proposed high order PP limiter. We perform numerical experiments on several benchmarks including linear advection, solid body rotation problem; and on the Landau damping, two-stream instabilities, bump-on-tail, and plasma sheath by solving the VP system. The efficacy and efficiency of the proposed scheme is numerically verified.
A Floquet Model for the Many-Body Localization Transition
Creators: name: Zhang, Liangsheng
name: Khemani, Vedika
name: Huse, David A.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: FOS: Physical sciences

description: The nature of the dynamical quantum phase transition between the many-body localized (MBL) phase and the thermal phase remains an open question, and one line of attack on this problem is to explore this transition numerically in finite-size systems. To maximize the contrast between the MBL phase and the thermal phase in such finite-size systems, we argue one should choose a Floquet model with no local conservation laws and rapid thermalization to "infinite temperature" in the thermal phase. Here we introduce and explore such a Floquet spin chain model, and show that standard diagnostics of the MBL-to-thermal transition behave well in this model even at modest sizes. We also introduce a physically motivated spacetime correlation function which peaks at the transition in the Floquet model, but is strongly affected by conservation laws in Hamiltonian models.
A JVLA survey of the high frequency radio emission of the massive magnetic B- and O-type stars
Creators: name: Kurapati, Sushma
name: Chandra, Poonam
name: Wade, Gregg
name: Cohen, David H.
name: David-Uraz, Alexandre
name: Gagne, Marc
name: Grunhut, Jason
name: Oksala, Mary E.
name: Petit, Veronique
name: Shultz, Matt
name: Sundqvist, Jon
name: Townsend, Richard H. D.
name: ud-Doula, Asif
Publisher: name: arXiv
Year: 2016
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: We conducted a survey of seven magnetic O and eleven B-type stars with masses above $8M_{\odot}$ using the Very Large Array in the 1cm, 3cm and 13cm bands. The survey resulted in a detection of two O and two B-type stars. While the detected O-type stars - HD 37742 and HD 47129 - are in binary systems, the detected B-type stars, HD 156424 and ALS 9522, are not known to be in binaries. All four stars were detected at 3cm, whereas three were detected at 1cm and only one star was detected at 13cm. The detected B-type stars are significantly more radio luminous than the non-detected ones, which is not the case for O-type stars. The non-detections at 13cm are interpreted as due to thermal free-free absorption. Mass-loss rates were estimated using 3cm flux densities and were compared with theoretical mass-loss rates, which assume free-free emission. For HD 37742, the two values of the mass-loss rates were in good agreement, possibly suggesting that the radio emission for this star is mainly thermal. For the other three stars, the estimated mass-loss rates from radio observations were much higher than those expected from theory, suggesting either a possible contribution from non- thermal emission from the magnetic star or thermal or non-thermal emission due to interacting winds of the binary system, especially for HD 47129. All the detected stars are predicted to host centrifugal magnetospheres except HD 37742, which is likely to host a dynamical magnetosphere. This suggests that non-thermal radio emission is favoured in stars with centrifugal magnetospheres.
description: Accepted for publication in Monthly Notices of the Royal Astronomical Society
On the thermodynamics of scale factor dual Universes
Creators: name: Sotkov, G. M.
name: Lima, A. L. Alves
name: da Silva, U. Camara
Publisher: name: arXiv
Year: 2016
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: The thermodynamical aspects of the conformal time scale factor duality (SFD) of cosmological models within Einstein Gravity are investigated. We derive the SFD transformations of the thermodynamical quantities describing the thermal evolution of the matter fluid and of the apparent horizon. The thermodynamical properties of the self-dual cosmological models with a modified Chaplygin gas are studied in detail. We deduce the restrictions on the equation of state parameters that allow to extend scale factor duality as a UV/IR symmetry of the cosmological models consistent with their thermodynamical behavior.
description: 9 pages; 2 figures
Spectrum and Structure of Excited Baryons with CLAS
Creators: name: Burkert, Volker D.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Nuclear Experiment (nucl-ex)
subject: High Energy Physics - Experiment (hep-ex)
subject: High Energy Physics - Lattice (hep-lat)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: In this contribution we discuss recent results in light quark baryon spectroscopy involving CLAS data and higher level analysis results from the partial wave analysis by the Bonn-Gatchina group. New baryon states were discovered largely based on the open strangeness production channels $γp \to K^+ Λ$ and $γp \to K^+ Σ^0$. The data illustrate the great potential of the kaon-hyperon channel in the discovery of higher mass baryon resonances in s-channel production. Other channels with discovery potential, such as $γp \to p ω$ and $γp \to ϕp$ are also discussed. In the second part I will demonstrate on data the sensitivity of meson electroproduction to expose the active degrees of freedom underlying resonance transitions as a function of the probed distance scale. For several of the prominent excited states in the lower mass range the short distance behavior is described by a core of three dressed-quarks with running quark mass, and meson-baryon contributions make up significant parts of the excitation strength at large distances. Finally, an outlook is given of baryon resonance physics at the 12 GeV CEBAF electron accelerator.
description: 11 pages, 21 figures
Measurement of charmonium decays at BESIII
Creators: name: YizhuoZhou
Publisher: name: Zenodo
Year: 2023

description: In this poster, recent measurements of charmonium decays of BESIII are presented. The process of $e^+e^-\to\eta J/\psi$ at center-of-mass energy 3.773 GeV is observed for the first time. Its Born cross section is measured, and the branching fraction of $\psi(3770)\to\eta J/\psi$ is determined by a combined fit to the cross sections at other energy points with the interference effect taken into account for the first time. Using the 448 million $\psi(3686)$ events collected with the BESIII detector, the evidence of the process $\eta_c(2S)\to\pi^+\pi^-\eta$ has been seen in the decay sequence $\psi(3686)\to\gamma\eta_c(2S)\to(\pi^+\pi^-\eta)$. The product of the branching fractions of $\psi(3686)\to\gamma\eta_c(2S)$ and $\eta_c(2S)\to\pi^+\pi^-\eta$ is reported as well as the individual branching fraction of $\eta_c(2S)\to\pi^+\pi^-\eta$. Using the same $\psi(3686)$ data sample, the branching fractions of the decays $\chi_{cJ}\to\phi\phi(J=0,1,2)$ have been measured with improved precision, and the polarization parameters of $\chi_{cJ}\to\phi\phi$ have been determined for the first time via a helicity amplitude analysis. Utilizing 2708 million $\psi(3686)$ events, the decays $\chi_{cJ}\to\Omega^-\bar{\Omega}^+(J=0,1,2)$ have been observed for the first time via the radiative decays of $\psi(3686)\to\gamma\chi_{cJ}$.
Collective Transport for Active Matter Run and Tumble Disk Systems on a Traveling Wave Substrate
Creators: name: Sándor, Cs.
name: Libál, A.
name: Reichhardt, C.
name: Reichhardt, C. J. Olson
Publisher: name: arXiv
Year: 2016
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: We numerically examine the transport of an assembly of active run-and-tumble disks interacting with a traveling wave substrate. We show that as a function of substrate strength, wave speed, disk activity, and disk density, a variety of dynamical phases arise that are correlated with the structure and net flux of disks. We find that there is a sharp transition into a state where the disks are only partially coupled to the substrate and form a phase separated cluster state. This transition is associated with a drop in the net disk flux and can occur as a function of the substrate speed, maximum substrate force, disk run time, and disk density. Since variation of the disk activity parameters produces different disk drift rates for a fixed traveling wave speed on the substrate, the system we consider could be used as an efficient method for active matter species separation. Within the cluster phase, we find that in some regimes the motion of the cluster center of mass is in the opposite direction to that of the traveling wave, while when the maximum substrate force is increased, the cluster drifts in the direction of the traveling wave. This suggests that swarming or clustering motion can serve as a method by which an active system can collectively move against an external drift.
description: 7 pages, 11 figures
Wave propagation in spatially modulated tubes
Creators: name: Ziepke, A.
name: Martens, S.
name: Engel, H.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Pattern Formation and Solitons (nlin.PS)
subject: Chemical Physics (physics.chem-ph)
subject: FOS: Physical sciences

description: We investigate wave propagation in rotationally symmetric tubes with a periodic spatial modulation of cross section. Using an asymptotic perturbation analysis, the governing quasi two-dimensional reaction-diffusion equation can be reduced into a one-dimensional reaction-diffusion-advection equation. Assuming a weak perturbation by the advection term and using projection method, in a second step, an equation of motion for traveling waves within such tubes can be derived. Both methods predict properly the nonlinear dependence of the propagation velocity on the ratio of the modulation period of the geometry to the intrinsic width of the front, or pulse. As a main feature, we can observe finite intervals of propagation failure of waves induced by the tube's modulation. In addition, using the Fick-Jacobs approach for the highly diffusive limit we show that wave velocities within tubes are governed by an effective diffusion coefficient. Furthermore, we discuss the effects of a single bottleneck on the period of pulse trains within tubes. We observe period changes by integer fractions dependent on the bottleneck width and the period of the entering pulse train.
description: 9 pages, 7 figures
Hamburger Sternwarte plate archives: Historic long-term variability study of active galaxies based on digitized photographic plates
Creators: name: Wertz, M.
name: Horns, D.
name: Groote, D.
name: Tuvikene, T.
name: Czesla, S.
name: Schmitt, J. H. M. M.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: At the Hamburger Sternwarte an effort was started in 2010 with the aim of digitizing its more than 45000 photographic plates and films stored in its plate archives. At the time of writing, more than 31000 plates have already been made available on the Internet for researchers, historians, as well as for the interested public. The digitization process and the Internet presentation of the plates and accompanying hand written material (plate envelopes, logbooks, observer notes) are presented here. To fully exploit the unique photometric and astrometric data, stored on the plates, further processing steps are required including registering the plate to celestial coordinates, masking of the plates, and a calibration of the photo-emulsion darkening curve. To demonstrate the correct functioning of these procedures, historical light curves of two bright BL Lac type active galactic nuclei are extracted. The resulting light curve of the blazar 1ES 1215+303 exhibits a large decrease in the magnitude from $14.25^{+0.07}_{-0.12}$ to $15.94^{+0.09}_{-0.13}$ in about 300 days, which proves the variability in the optical region. Furthermore, we compare the measured magnitudes for the quasar 3C~273 with contemporaneous measurements.
description: Accepted in AN
60dB high-extinction auto-configured Mach--Zehnder interferometer
Creators: name: Wilkes, Callum M.
name: Qiang, Xiaogang
name: Wang, Jianwei
name: Santagati, Raffaele
name: Paesani, Stefano
name: Zhou, Xiaoqi
name: Miller, David A. B.
name: Marshall, Graham D.
name: Thompson, Mark G.
name: O'Brien, Jeremy L.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Optics (physics.optics)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Imperfections in integrated photonics manufacturing have a detrimental effect on the maximal achievable visibility in interferometric architectures. These limits have profound implications for further photonics technological developments and in particular for quantum photonics technologies. Active optimisation approaches, together with reconfigurable photonics, have been proposed as a solution to overcome this. In this paper, we demonstrate an ultra-high (>60 dB) extinction ratio in a silicon photonic device consisting of cascaded Mach-Zehnder interferometers, in which additional interferometers function as variable beamsplitters. The imperfections of fabricated beamsplitters are compensated using an automated progressive optimization algorithm with no requirement for pre-calibration. This work shows the possibility of integrating and accurately controlling linear-optical components for large-scale quantum information processing and other applications.
description: 4 pages, 3 figures
Transient Events in Archival Very Large Array Observations of the Galactic Center
Creators: name: Chiti, Anirudh
name: Chatterjee, Shami
name: Wharton, Robert
name: Cordes, James
name: Lazio, T. Joseph W.
name: Kaplan, David L.
name: Bower, Geoffrey C.
name: Croft, Steve
Publisher: name: arXiv
Year: 2016
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: The Galactic center has some of the highest stellar densities in the Galaxy and a range of interstellar scattering properties that may aid in the detection of new radio-selected transient events. Here we describe a search for radio transients in the Galactic center using over 200 hours of archival data from the Very Large Array (VLA) at 5 and 8.4 GHz. Every observation of SgrA* from 1985$-$2005 has been searched using an automated processing and detection pipeline sensitive to transients with timescales between 30 seconds and five minutes with a typical detection threshold of $\sim$100 mJy. Eight possible candidates pass tests to filter false-positives from radio-frequency interference, calibration errors, and imaging artifacts. Two events are identified as promising candidates based on the smoothness of their light curves. Despite the high quality of their light curves, these detections remain suspect due to evidence of incomplete subtraction of the complex structure in the Galactic center, and apparent contingency of one detection on reduction routines. Events of this intensity ($\sim$100 mJy) and duration ($\sim$100 s) are not obviously associated with known astrophysical sources, and no counterparts are found in data at other wavelengths. We consider potential sources, including Galactic center pulsars, dwarf stars, sources like GCRT J1745-3009, and bursts from X-ray binaries. None can fully explain the observed transients, suggesting either a new astrophysical source or a subtle imaging artifact. More sensitive multiwavelength studies are necessary to characterize these events which, if real, occur with a rate of $14^{+32}_{-12}~{\rm hr}^{-1}\,{\rm deg}^{-2}$ in the Galactic center.
description: 15 pages, 14 figures, 4 tables. Accepted for publication in the Astrophysical Journal
Notes on S-folds and $\mathcal{N}=3$ theories
Creators: name: Agarwal, Prarit
name: Amariti, Antonio
Publisher: name: arXiv
Year: 2016
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We consider D3 branes in presence of an S-fold plane. The latter is a non perturbative object, arising from the combined projection of an S-duality twist and a discrete orbifold of the R-symmetry group. This construction naively gives rise to 4d $\mathcal{N}=3$ SCFTs. Nevertheless it has been observed that in some cases supersymmetry is enhanced to $\mathcal{N}=4$. In this paper we study the explicit counting of degrees of freedom arising from vector multiplets associated to strings suspended between the D3 branes probing the S-fold. We propose that, for trivial discrete torsion, there is no vector multiplet associated to $(1,0)$ strings stretched between a brane and its image. We then focus on the case of rank 2 $\mathcal{N}=3$ theory that enhances to $SU(3)$ $\mathcal{N}=4$ SYM, explicitly spelling out the isomorphism between the BPS-spectrum of the manifestly $\mathcal{N}=3$ theory and that of three D3 branes in flat spacetime. Subsequently, we consider 3-pronged strings in these setups and show how wall-crossing in the S-fold background implies wall crossing in the flat geometry. This can be considered a consistency check of the \emph{conjectured} SUSY enhancement. We also find that the above isomorphism implies that a $(1,0)$ string, suspended between a brane and its image in the S-fold, corresponds to a 3-string junction in the flat geometry. This is in agreement with our claim on the absence of a vector multiplet associated to such $(1,0)$ strings. This is because the 3-string junction in flat geometry gives rise to a $1/4$-th BPS multiplet of the $\mathcal{N}=4$ algebra. Such multiplets always include particles with spin $>1$ as opposed to a vector multiplet which is restricted by the requirement that the spins must be $\leq 1$.
description: 19 pages, 7 figures
European Union Litigation
Creators: name: Hacker, Philipp
name: Kas, Betül
Publisher: name: Humboldt-Universität zu Berlin
Year: 2019
Subjects: subject: 340 Recht

description: This publication is with permission of the rights owner freely accessible due to an Alliance licence and a national licence (funded by the DFG, German Research Foundation) respectively.
description: This article provides an overview of cases decided by the Court of Justice of the European Union concerning contract law. The present issue covers the period between the beginning of February and the end of June 2019.
HOMFLY-PT homology for general link diagrams and braidlike isotopy
Creators: name: Abel, Michael
Publisher: name: arXiv
Year: 2016
Subjects: subject: Quantum Algebra (math.QA)
subject: Geometric Topology (math.GT)
subject: FOS: Mathematics

description: Khovanov and Rozansky's categorification of the HOMFLY-PT polynomial is invariant under braidlike isotopies for any link diagram and Markov moves for braid closures. To define HOMFLY-PT homology, they required a link to be presented as a braid closure, because they did not prove invariance under the other oriented Reidemeister moves. In this text we prove that the Reidemeister IIb move fails in HOMFLY-PT homology by using virtual crossing filtrations of the author and Rozansky. The decategorification of HOMFLY-PT homology for general link diagrams gives a deformed version of the HOMFLY-PT polynomial, $P^{b}(D)$, which can be used to detect nonbraidlike isotopies. Finally, we will use $P^{b}(D)$ to prove that HOMFLY-PT homology is not an invariant of virtual links, even when virtual links are presented as virtual braid closures.
description: 26 pages, many TikZ figures
Net Baryon Fluctuations from a Crossover Equation of State
Creators: name: Kapusta, J.
name: Albright, M.
name: Young, C.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: We have constructed an equation of state which smoothly interpolates between an excluded volume hadron resonance gas at low energy density to a plasma of quarks and gluons at high energy density. This crossover equation of state agrees very well with lattice calculations at both zero and nonzero baryon chemical potential. We use it to compute the variance, skewness, and kurtosis of fluctuations of baryon number, and compare to measurements of proton number fluctuations in central Au-Au collisions as measured by the STAR collaboration in a beam energy scan at the Relativistic Heavy Ion Collider. The crossover equation of state can reproduce the data if the fluctuations are frozen out at temperatures well below than the average chemical freeze-out.
description: 5 pages, 7 figures. arXiv admin note: substantial text overlap with arXiv:1506.03408
La TVA devrait-elle figurer dans les comptes d'exploitation des entreprises ?
Creators: name: Romani, Christophe
Publisher: name: Zenodo
Year: 2021
Subjects: Analyse financière - Financial analysis
Comptabilité - Accounting
Taxes

description: La TVA est habituellement présentée comme un impôt indirect sur la consommation, mais il est tout aussi juste de la qualifier d’impôt direct sur les marges des entreprises, comme cela a déjà été démontré dans la littérature économique. De ce point de vue, la TVA a une incidence sur la rentabilité des entreprises : dans le cadre de la comptabilité, il devient alors logique de préconiser une approche Toutes Taxes Comprises du compte d’exploitation. Should VAT be booked in the companies' income statements? VAT is usually presented as an indirect tax on consumption, but it is just as fair to refer to it as a direct tax on companies’ margins, as already demonstrated in the economic literature. From this point of view, VAT has an impact on the profitability of businesses: in the accounting, it then becomes logical to recommend an all-taxes-included approach of the P&L.
La TVA devrait-elle figurer dans les comptes d'exploitation des entreprises ?
Creators: name: Romani, Christophe
Publisher: name: Zenodo
Year: 2021
Subjects: Analyse financière - Financial analysis
Comptabilité - Accounting
Taxes

description: La TVA est habituellement présentée comme un impôt indirect sur la consommation, mais il est tout aussi juste de la qualifier d’impôt direct sur les marges des entreprises, comme cela a déjà été démontré dans la littérature économique. De ce point de vue, la TVA a une incidence sur la rentabilité des entreprises : dans le cadre de la comptabilité, il devient alors logique de préconiser une approche Toutes Taxes Comprises du compte d’exploitation. Should VAT be booked in the companies' income statements? VAT is usually presented as an indirect tax on consumption, but it is just as fair to refer to it as a direct tax on companies’ margins, as already demonstrated in the economic literature. From this angle, VAT has an impact on the profitability of businesses: in the accounting, as a consequence, it becomes logical to recommend an all-taxes-included approach of the P&L.
NiCl3 Monolayer: Dirac Spin-Gapless Semiconductor and Chern Insulator
Creators: name: He, Junjie
name: Li, Xiao
name: Lyu, Pengbo
name: Nachtigall, Petr
Publisher: name: arXiv
Year: 2016
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: The great obstacle for practical applications of the quantum anomalous Hall (QAH) effect is the lack of suitable QAH materials (Chern insulators) with large non-trivial band gap, room-temperature magnetic order and high carrier mobility. The Nickle chloride (NiCl3) monolayer characteristics are investigated herein using first-principles calculations. It is reported that NiCl3 monolayers constitute a new class of Dirac materials with Dirac spin-gapless semiconducting and high-temperature ferromagnetism (~400K). Taking into account the spin-orbit coupling, the NiCl3 monolayer becomes an intrinsic insulator with a large non-trivial band gap of ~24 meV, corresponding to an operating temperature as high as ~280K at which the quantum anomalous Hall effect could be observed. The calculated large non-trivial gap, high Curie temperature and single-spin Dirac states reported herein for the NiCl3 monolayer lead us to propose that this material give a great promise for potential realization of a near-room temperature QAH effect and potential applications in spintronics. Last but not least the calculated Fermi velocities of Dirac fermion of about 4x105 m/s indicate very high mobility in NiCl3 monolayers.
description: 17 pages, 6 figures, conference or other essential info
La TVA devrait-elle figurer dans les comptes d'exploitation des entreprises ?
Creators: name: Romani, Christophe
Publisher: name: Zenodo
Year: 2023
Subjects: Analyse financière - Financial analysis
Comptabilité - Accounting
Taxes
Compte de résultat - P&L report

description: La TVA est habituellement présentée comme un impôt indirect sur la consommation, mais il est tout aussi juste de la qualifier d’impôt direct sur les marges des entreprises, comme cela a déjà été démontré dans la littérature économique. De ce point de vue, la TVA a une incidence sur la rentabilité des entreprises : dans le cadre de la comptabilité, il devient alors logique de préconiser une approche Toutes Taxes Comprises du compte d’exploitation. Should VAT be booked in the companies' income statements? VAT is usually being presented as an indirect tax on consumption, but it is just as fair to refer to it as a direct tax on companies’ margins, as already demonstrated in the economic literature. From this angle, VAT has an impact on the profitability of businesses: in the field of accounting, as a consequence, it becomes logical to recommend an all-taxes-included approach of the P&L.
La TVA devrait-elle figurer dans les comptes d'exploitation des entreprises ?
Creators: name: Romani, Christophe
Publisher: name: Zenodo
Year: 2022
Subjects: Analyse financière - Financial analysis
Comptabilité - Accounting
Taxes

description: La TVA est habituellement présentée comme un impôt indirect sur la consommation, mais il est tout aussi juste de la qualifier d’impôt direct sur les marges des entreprises, comme cela a déjà été démontré dans la littérature économique. De ce point de vue, la TVA a une incidence sur la rentabilité des entreprises : dans le cadre de la comptabilité, il devient alors logique de préconiser une approche Toutes Taxes Comprises du compte d’exploitation. Should VAT be booked in the companies' income statements? VAT is usually presented as an indirect tax on consumption, but it is just as fair to refer to it as a direct tax on companies’ margins, as already demonstrated in the economic literature. From this angle, VAT has an impact on the profitability of businesses: in the field of accounting, as a consequence, it becomes logical to recommend an all-taxes-included approach of the P&L.
La TVA devrait-elle figurer dans les comptes d'exploitation des entreprises ?
Creators: name: Romani, Christophe
Publisher: name: Zenodo
Year: 2022
Subjects: Analyse financière - Financial analysis
Comptabilité - Accounting
Taxes

description: La TVA est habituellement présentée comme un impôt indirect sur la consommation, mais il est tout aussi juste de la qualifier d’impôt direct sur les marges des entreprises, comme cela a déjà été démontré dans la littérature économique. De ce point de vue, la TVA a une incidence sur la rentabilité des entreprises : dans le cadre de la comptabilité, il devient alors logique de préconiser une approche Toutes Taxes Comprises du compte d’exploitation. Should VAT be booked in the companies' income statements? VAT is usually being presented as an indirect tax on consumption, but it is just as fair to refer to it as a direct tax on companies’ margins, as already demonstrated in the economic literature. From this angle, VAT has an impact on the profitability of businesses: in the field of accounting, as a consequence, it becomes logical to recommend an all-taxes-included approach of the P&L.
Time-multiplexed amplification in a hybrid-less and coil-less Josephson parametric converter
Creators: name: Abdo, Baleegh
name: Chavez-Garcia, Jose M.
name: Brink, Markus
name: Keefe, George
name: Chow, Jerry M.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: Josephson parametric converters (JPCs) are superconducting devices capable of performing nondegenerate, three-wave mixing in the microwave domain without losses. One drawback limiting their use in scalable quantum architectures is the large footprint of the auxiliary circuit needed for their operation, in particular, the use of off-chip, bulky, broadband hybrids and magnetic coils. Here, we realize a JPC which eliminates the need for these bulky components. The pump drive and flux bias are applied in the new device through an on-chip, lossless, three-port power divider and on-chip flux line, respectively. We show that the new design considerably simplifies the circuit and reduces the footprint of the device while maintaining a comparable performance to state-of-the-art JPCs. Furthermore, we exploit the tunable bandwidth property of the JPC and the added capability of applying alternating currents to the flux line in order to switch the resonance frequencies of the device, hence demonstrating time-multiplexed amplification of microwave tones that are separated by more than the dynamical bandwidth of the amplifier. Such a measurement technique can potentially serve to perform time-multiplexed, high-fidelity readout of superconducting qubits.