cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Aspects of circuit breaker performance during high voltage shunt reactor switching
Creators: name: Giudici, Ben Charles
Publisher: name: University of British Columbia
Year: 2010

description: High voltage shunt reactor switching is a difficult circuit breaker duty. Severe reactor network insulation stresses can occur on breaker current chopping and even more so on breaker reignition. Predicting reactor switching transients is fundamental to assessing insulation concerns, and evaluating circuit breaker performance. This work demonstrates measurement of circuit breaker interruption characteristics relevant to reactor switching, and their use in computer simulation of reactor switching transients. A technique for predicting circuit breaker reactor switching performance through simulation is also introduced and tested.
Additional file 1 of An efficacy and safety evaluation of montelukast + fluticasone propionate vs. fluticasone propionate in the treatment of cough variant asthma in children: a meta-analysis
Creators: name: Wei, Zhengbo
name: Li, Sheng
Publisher: name: figshare
Year: 2023
Subjects: subject: Medicine
subject: Molecular Biology
subject: Biotechnology
subject: Science Policy
subject: Infectious Diseases
subject: FOS: Health sciences

description: Additional file 1: Figure S1. Funnel plot. A, the total effective rate. B, cough recurrence rate. C, the cough symptom score. D, cough relief time. E, cough disappearance time. F, percentage of forced expiratory volume in 1 second (FEV1%). G, percentage of predicted peak expiratory flow (PEF%). H, headache. I, dizzy. J, hoarseness. K, abdominal pain. L, total complications.
On the self-adjointness and domain of Pauli-Fierz type Hamiltonians
Creators: name: Hasler, D.
name: Herbst, I.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: We prove a general theorem about the self-adjointness and domain of Pauli-Fierz type Hamiltonians. Our proof is based on commutator arguments which allow us to treat fields with non-commuting components. As a corollary it follows that the domain of the Hamiltonian of non-relativistic QED with Coulomb interactions is independent of the coupling constant.
The Hubble PanCET program: Long-term chromospheric evolution and flaring activity of the M dwarf host GJ 3470
Creators: name: Bourrier, V.
name: Santos, L. A. dos
name: Sanz-Forcada, J.
name: Munoz, A. Garcia
name: Henry, G. W.
name: Lavvas, P.
name: Lecavelier, A.
name: Lopez-Morales, M.
name: Mikal-Evans, T.
name: Sing, D. K.
name: Wakeford, H. R.
name: Ehrenreich, D.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: Neptune-size exoplanets seem particularly sensitive to atmospheric evaporation, making it essential to characterize the stellar high-energy radiation that drives this mechanism. This is particularly important with M dwarfs, which emit a large and variable fraction of their luminosity in the UV and can display strong flaring behavior. The warm Neptune GJ3470b, hosted by an M2 dwarf, was found to harbor a giant hydrogen exosphere thanks to 3 transits observed with the HST/STIS. Here we report on 3 additional transit observations from the PanCET program, obtained with the HST/COS. These data confirm the absorption signature from GJ3470b's exosphere in the stellar Ly-alpha line and demonstrate its stability over time. No planetary signatures are detected in other lines, setting a 3sigma limit on GJ3470b's FUV radius at 1.3x its Roche lobe radius. We detect 3 flares from GJ3470. They show different spectral energy distributions but peak consistently in the Si III line, which traces intermediate-temperature layers in the transition region. These layers appear to play a particular role in GJ3470's activity as emission lines that form at lower or higher temperatures than Si III evolved differently over the long term. Based on the measured emission lines, we derive synthetic XUV spectra for the 6 observed quiescent phases, covering one year, as well as for the 3 flaring episodes. Our results suggest that most of GJ3470's quiescent high-energy emission comes from the EUV domain, with flares amplifying the FUV emission more strongly. The hydrogen photoionization lifetimes and mass loss derived for GJ3470b show little variation over the epochs, in agreement with the stability of the exosphere. Simulations informed by our XUV spectra are required to understand the atmospheric structure and evolution of GJ3470b and the role played by evaporation in the formation of the hot-Neptune desert.
description: 21 pages, 18 figures, accepted in A&A
Anomalous energy transport in the FPU-beta chain
Creators: name: Lukkarinen, Jani
name: Spohn, Herbert
Publisher: name: arXiv
Year: 2007
Subjects: subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences
subject: 80A20; 74A25; 82C21; 46N55

description: We consider the energy current correlation function for the FPU-beta lattice. For small non-linearity one can rely on kinetic theory. The issue reduces then to a spectral analysis of the linearized collision operator. We prove thereby that, on the basis of kinetic theory, the energy current correlations decay in time as t^(-3/5). It follows that the thermal conductivity is anomalous, increasing as N^(2/5) with the system size N.
description: 33 pages, 2 EPS figures
Discrete target recognition in polarimetric SAR imagery
Creators: name: Heal, John Russell
Publisher: name: University of British Columbia
Year: 2010

description: The recognition of discrete man-made targets in remotely sensed imagery is an important problem for strategic and tactical applications. The objective of this thesis is to examine whether the extra information content in polarimetric radar imagery will overcome the difficult problems in remotely sensed Synthetic Aperture Radar (SAR) data and improve target recognition capabilities with respect to single channel SAR. In conventional SAR these problems are mainly the result of speckle and receiver noise adversely affecting the limited information available in the single channel of data. To meet this objective, target samples from different target classes have been identified in real, polarimetric SAR data. These targets have a strong backscatter relative to the background clutter and are about three to six pixels in size. Target classes are denned by their polarization signature and available ground truth data. By exploiting the polarimetric properties of these targets it is possible to demonstrate an improvement in target detectability. A large number of measurements extracted from the polarimetric properties of scatterers are examined and reduced sets of these features have been selected. To discriminate identified targets in a SAR image, a supervised classification algorithm has been implemented. Optimal weighting of the feature sets to improve classification was not implemented due to the low confidence placed on the target feature distribution estimates as a result of the sparse training set. However, a comparison of classification results using the polarimetric data with trials performed on single channel SAR data synthesized from the same data set, clearly demonstrates a significant performance benefit of polarimetric radar. A polarimetric target model has been developed to estimate the sensitivity of the polarimetric classifier to several of the adverse properties of SAR polarimetry. Throughout this thesis, the observations are compared with other current research in this area and several related conclusions can be reached.
Does Planck Actually "See" the Bunch-Davies State?
Creators: name: Baunach, Rose
name: Bolis, Nadia
name: Holman, R.
name: Moltner, Stacie
name: Richard, Benoit J.
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: To what extent can the Planck satellite observations be interpreted as confirmation of the quantum part of the inflationary paradigm? Has it "seen" the Bunch-Davies state? We compare and contrast the Bunch-Davies interpretation with one using a so-called entangled state in which the fluctuations of a spectator scalar field are entangled with those of the metric perturbations $ζ$. We first show how a spectator scalar field $Σ$, with an expectation value $σ(t)$ that evolves in time, will generically generate such a state. We then use this state to compute the power spectrum $P_ζ(k)$ and thence the temperature anisotropies $C_l$ in the Cosmic Microwave Background (CMB). We find interesting differences from the standard calculations using the Bunch-Davies (BD) state. We argue that existing data may already be used to place interesting bounds on this class of deviations from the BD state and that, for some values of the parameters of the state, the power spectra may be consistent with the Planck satellite data.
description: 32 pages, 12 figures. V2: Final version accepted for publication in JCAP. Changes: References added and minor clarifications to the presentation
Diffractive parton distributions from the analysis with higher twist
Creators: name: Golec-Biernat, K.
name: Luszczak, A.
Publisher: name: arXiv
Year: 2007
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: Diffractive parton distributions of the proton are determined from fits to diffractive data from HERA. In addition to the twist--2 contribution, the twist--4 contribution from longitudinally polarised virtual photons is considered, which is important in the region of small diffractive masses. A new prediction for the longitudinal diffractive structure function is presented which differs significantly from that obtained in the pure twist--2 analyses.
description: 24 pages, 12 figures, significant improvements, version to be published in Phys. Rev. D
Thermal Casimir effect for the scalar field in flat spacetime under a helix boundary condition
Creators: name: Aleixo, Giulia
name: Mota, Herondy
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: In this work we consider the generalized zeta function method to obtain temperature corrections to the vacuum (Casimir) energy density, at zero temperature, associated with quantum vacuum fluctuations of a scalar field subjected to a helix boundary condition and whose modes propagate in (3+1)-dimensional Euclidean spacetime. We find closed and analytical expressions for both the two-point heat kernel function and free energy density in the massive and massless scalar field cases. In particular, for the massless scalar field case, we also calculate the thermodynamics quantities internal energy density and entropy density, with their corresponding high- and low-temperature limits. We show that the temperature correction term in the free energy density must suffer a finite renormalization, by subtracting the scalar thermal blackbody radiation contribution, in order to provide the correct classical limit at high temperatures. We check that, at low temperature, the entropy density vanishes as the temperature goes to zero, in accordance with the third law of thermodynamics. We also point out that, at low temperatures, the dominant term in the free energy and internal energy densities is the vacuum energy density at zero temperature. Finally, we also show that the pressure obeys an equation of state.
description: 16 pages, new discussions and appendix added, to be published in PRD
Nick Virgilio haiku archive, box 02 folder 19
Creators: name: Virgilio, Nicholas A. (Nicholas Anthony)
Publisher: name: No Publisher Supplied
Year: 1962

description: The Nicholas Virgilio Haiku Archive is primarily composed of sheets of typed haiku poems, several poems to a page, only a few ever published; some correspondence, mostly related to publishing or speaking engagements; and a small amount of personal correspondence. Virgilio lived in Camden, New Jersey and is a renowned haikuist.
I "Makers": il lavoro agli albori della terza rivoluzione industriale
Creators: name: Forlivesi, Michele
Publisher: name: Dipartimento di Scienze Giuridiche. Alma Mater Studiorum - Università di Bologna
Year: 2015
Subjects: Makers; technological innovation; new jobs; microentrepreneur; self-employed; workers freedom of self-determination

description: L'A. sottolinea come l'evoluzione tecnologica e la massiccia digitalizzazione dei processi produttivi globali non solo premettano l'affermarsi sul mercato di nuovi lavori e professionalità, ma impongano un radicale ripensamento dei tradizionali paradigmi analitico-descrittivi della realtà ed, in particolare, una nuova riflessione sul quantum e sul quomodo della produzione industriale e dell'appropriazione di beni e servizi nel mercato globale.

Tali considerazioni trovano la loro massima espressione nel c.d. fenomeno dei makers, ossia giovani creativi che, operando tramite community online, software e hardware open source, dette "fablabs", sfruttano le nuove tecnologie, in primis le stampanti 3D, per passare dalla fase del mero progetto a quella della realizzazione e commercializzazione dell'idea.

Questa nuova forma di auto-impiego porta l'A. ad interrogarsi sulla possibile riconducibilità del micro-imprenditore al lavoro autonomo e sulla necessità di un generale ripensamento dei tradizionali paradigmi protettivi in favore di una maggiore valorizzazione della libertà di autodeterminazione del prestatore d'opera e dei suoi diritti fondamentali.
description: Labour & Law Issues, Vol 1, No 1 (2015)
Untersuchung des Wärmeübergangs durch Einspritzkühlung für ein Höchstleistungsgetriebe
Creators: name: Von Plehwe, Felix C.
Publisher: name: Logos Verlag Berlin
Year: 2022
Subjects: Flugtriebwerk
Getriebe
Wärmeübergang
Tribologie
Geared Turbofan

description: Angesichts des hohen Nebenstromverhältnisses moderner Flugtriebwerke wird die Einführung eines Getriebes zwischen Niederdruckturbine und Fan attraktiv. Ein solches Getriebe stellt aufgrund der hohen übertragenen Leistung und den stark gegensätzlichen Forderungen nach geringem Gewicht, geringem Bauraum, hoher Zuverlässigkeit und hohem Wirkungsgrad eine große Herausforderung dar und erfordert die genaue Kenntnis aller beteiligten Vorgänge. Einer dieser Vorgänge ist der Wärmeübergang durch Einspritzkühlung. In der vorliegenden Arbeit wird eine neuartige experimentelle Methode vorgestellt, mit der dieser am rotierenden Zahnrad ortsaufgelöst und mit hoher Genauigkeit bestimmt werden kann. Der Wärmeübergang wird mit dieser Methode für einen breiten Betriebsbereich ermittelt. Der Einfluss von Ölvolumenstrom, Drehzahl und Düsenwinkel auf den Wärmeübergang wird anhand dieser ortsaufgelösten Daten erstmalig beschrieben. Es zeigt sich die Existenz einer kritischen Drehzahl, bei deren Überschreitung ein deutlicher Rückgang des Wärmeübergangs auftritt. Durch Verwendung eines kinematischen Modells des Ölaufpralls können die beobachteten Zusammenhänge erklärt werden. Örtlich aufgelöste Messungen des Wärmeübergangs sind durch die vorliegende Arbeit erstmalig und für einen weiten Parameterbereich verfügbar. Dies versetzt den Entwickler in die Lage, eine ausreichende Kühlung der Zahnflanken sicherzustellen, ohne dabei Wirkungsgradverluste durch zu hohe eingesetzte Ölvolumenströme zu riskieren.
title: Оценка состояния материально-технической базы противотуберкулезных учреждений в Ханты-Мансийском округе в 1965–1985 гг.
title: Assessment of the State of the Material and Technical Base of Antituberculosis Institutions in the Khanty-Mansiysk District in 1965-1985
Creators: name: Легостаева, Анастасия Юрьевна
Publisher: name: Издательский центр СурГУ
Year: 2021

description: Материально-техническая база противотуберкулезных учреждений складывается из нескольких составляющих – это техническое состояние зданий и сооружений, оснащение специальным медицинским оборудованием, лекарственными препаратами, мягким и твердым инвентарем. В статье в историческом аспекте приводится анализ материально-технической базы противотуберкулезных учреждений в Ханты-Мансийском округе за период 1965–1985 гг.
description: The material and technical base of anti-tuberculosis institutions consists of several components – this is the technical condition of buildings and structures, equipping with special medical equipment, medicines, light and heavy equipment. The article presents an analysis of the material and technical base of anti-tuberculosis institutions in the Khanty-Mansiysk Okrug for the period 1965-1985 in the historical aspect.
Numerical Calculation With Arbitrary Precision
Creators: name: Rodrigues, B. O.
name: da Mota, L. A. C. P.
name: Duarte, L. G. S.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Numerical Analysis (math.NA)
subject: Mathematical Software (cs.MS)
subject: FOS: Mathematics
subject: FOS: Computer and information sciences

description: The vast use of computers on scientific numerical computation makes the awareness of the limited precision that these machines are able to provide us an essential matter. A limited and insufficient precision allied to the truncation and rounding errors may induce the user to incorrect interpretation of his/hers answer. In this work, we have developed a computational package to minimize this kind of error by offering arbitrary precision numbers and calculation. This is very important in Physics where we can work with numbers too small and too big simultaneously.
description: contribution to X hadron Physics - 2007 to appear on International Journal of Modern Physics E
GRB 061121: Broadband spectral evolution through the prompt and afterglow phases of a bright burst
Creators: name: Page, K. L.
name: Willingale, R.
name: Osborne, J. P.
name: Zhang, B.
name: Godet, O.
name: Marshall, F. E.
name: Melandri, A.
name: Norris, J. P.
name: O'Brien, P. T.
name: Pal'shin, V.
name: Rol, E.
name: Romano, P.
name: Starling, R. L. C.
name: Schady, P.
name: Yost, S. A.
name: Barthelmy, S. D.
name: Beardmore, A. P.
name: Cusumano, G.
name: Burrows, D. N.
name: De Pasquale, M.
name: Ehle, M.
name: Evans, P. A.
name: Gehrels, N.
name: Goad, M. R.
name: Golenetskii, S.
name: Guidorzi, C.
name: Mundell, C.
name: Page, M. J.
name: Ricker, G.
name: Sakamoto, T.
name: Schaefer, B. E.
name: Stamatikos, M.
name: Troja, E.
name: Ulanov, M.
name: Yuan, F.
name: Ziaeepour, H.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Swift triggered on a precursor to the main burst of GRB 061121 (z=1.314), allowing observations to be made from the optical to gamma-ray bands. Many other telescopes, including Konus-Wind, XMM-Newton, ROTSE and the Faulkes Telescope North, also observed the burst. The gamma-ray, X-ray and UV/optical emission all showed a peak ~75s after the trigger, although the optical and X-ray afterglow components also appear early on - before, or during, the main peak. Spectral evolution was seen throughout the burst, with the prompt emission showing a clear positive correlation between brightness and hardness. The Spectral Energy Distribution (SED) of the prompt emission, stretching from 1eV up to 1MeV, is very flat, with a peak in the flux density at ~1keV. The optical-to-X-ray spectra at this time are better fitted by a broken, rather than single, power-law, similar to previous results for X-ray flares. The SED shows spectral hardening as the afterglow evolves with time. This behaviour might be a symptom of self-Comptonisation, although circumstellar densities similar to those found in the cores of molecular clouds would be required. The afterglow also decays too slowly to be accounted for by the standard models. Although the precursor and main emission show different spectral lags, both are consistent with the lag-luminosity correlation for long bursts. GRB 061121 is the instantaneously brightest long burst yet detected by Swift. Using a combination of Swift and Konus-Wind data, we estimate an isotropic energy of 2.8x10^53 erg over 1keV - 10MeV in the GRB rest frame. A probable jet break is detected at ~2x10^5s, leading to an estimate of ~10^51 erg for the beaming-corrected gamma-ray energy.
description: 17 pages, 11 figures (1 in colour), accepted for publication in ApJ
Attention-guided Temporally Coherent Video Object Matting
Creators: name: Zhang, Yunke
name: Wang, Chi
name: Cui, Miaomiao
name: Ren, Peiran
name: Xie, Xuansong
name: Hua, Xian-sheng
name: Bao, Hujun
name: Huang, Qixing
name: Xu, Weiwei
Publisher: name: arXiv
Year: 2021
Subjects: subject: Computer Vision and Pattern Recognition (cs.CV)
subject: FOS: Computer and information sciences

description: This paper proposes a novel deep learning-based video object matting method that can achieve temporally coherent matting results. Its key component is an attention-based temporal aggregation module that maximizes image matting networks' strength for video matting networks. This module computes temporal correlations for pixels adjacent to each other along the time axis in feature space, which is robust against motion noises. We also design a novel loss term to train the attention weights, which drastically boosts the video matting performance. Besides, we show how to effectively solve the trimap generation problem by fine-tuning a state-of-the-art video object segmentation network with a sparse set of user-annotated keyframes. To facilitate video matting and trimap generation networks' training, we construct a large-scale video matting dataset with 80 training and 28 validation foreground video clips with ground-truth alpha mattes. Experimental results show that our method can generate high-quality alpha mattes for various videos featuring appearance change, occlusion, and fast motion. Our code and dataset can be found at: https://github.com/yunkezhang/TCVOM
description: 10 pages, 6 figures, MM '21 camera-ready
On the subdivision of small categories
Creators: name: del Hoyo, Matias Luis
Publisher: name: arXiv
Year: 2007
Subjects: subject: Algebraic Topology (math.AT)
subject: FOS: Mathematics
subject: 18G55, 55U35, 18B35

description: We present an intrinsic and concrete development of the subdivision of small categories, give some simple examples and derive its fundamental properties. As an application, we deduce an alternative way to compare the homotopy categories of spaces and small categories, by using partially ordered sets. This yields a new conceptual proof to the well-known fact that these two homotopy categories are equivalent.
description: 15 pages
Screening 2D materials with topological flat bands
Creators: name: Liu, Hang
name: Meng, Sheng
name: Liu, Feng
Publisher: name: arXiv
Year: 2021
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Topological flat band (TFB) has been proposed theoretically in various lattice models, to exhibit a rich spectrum of intriguing physical behaviors. However, the experimental demonstration of flat band (FB) properties has been severely hindered by the lack of materials realization. Here, by screening materials from a first-principles materials database, we identify a group of 2D materials with TFBs near the Fermi level, covering some simple line-graph and generalized line-graph FB lattice models. These include the Kagome sublattice of O in TiO2 yielding a spin-unpolarized TFB, and that of V in ferromagnetic V3F8 yielding a spin-polarized TFB. Monolayer Nb3TeCl7 and its counterparts from element substitution are found to be breathing-Kagome-lattice crystals. The family of monolayer III2VI3 compounds exhibit a TFB representing the coloring-triangle lattice model. ReF3, MnF3 and MnBr3 are all predicted to be diatomic-Kagome-lattice crystals, with TFB transitions induced by atomic substitution. Finally, HgF2, CdF2 and ZnF2 are discovered to host dual TFBs in the diamond-octagon lattice. Our findings pave the way to further experimental exploration of eluding FB materials and properties.
description: 27 pages, 18 figures, 4 tables
Burgers Turbulence
Creators: name: Bec, Jeremie
name: Khanin, Konstantin
Publisher: name: arXiv
Year: 2007
Subjects: subject: Chaotic Dynamics (nlin.CD)
subject: FOS: Physical sciences

description: The last decades witnessed a renewal of interest in the Burgers equation. Much activities focused on extensions of the original one-dimensional pressureless model introduced in the thirties by the Dutch scientist J.M. Burgers, and more precisely on the problem of Burgers turbulence, that is the study of the solutions to the one- or multi-dimensional Burgers equation with random initial conditions or random forcing. Such work was frequently motivated by new emerging applications of Burgers model to statistical physics, cosmology, and fluid dynamics. Also Burgers turbulence appeared as one of the simplest instances of a nonlinear system out of equilibrium. The study of random Lagrangian systems, of stochastic partial differential equations and their invariant measures, the theory of dynamical systems, the applications of field theory to the understanding of dissipative anomalies and of multiscaling in hydrodynamic turbulence have benefited significantly from progress in Burgers turbulence. The aim of this review is to give a unified view of selected work stemming from these rather diverse disciplines.
description: Review Article, 49 pages, 43 figures
A distributed transputer-based architecture using a reconfigurable synchronous communication protocol
Creators: name: Vachon, Marie Josette Brigitte
Publisher: name: University of British Columbia
Year: 2010

description: A reliable, reconfigurable, and expandable distributed architecture supporting both bus and point-to-point communication for robotic applications is proposed. The new architecture is based on Inmos T800 microprocessors interconnected through crossbar switches, where communication between nodes takes place via point-to-point bidirectional links. Software development is done on a host computer, Sun 3/280, and the executable code is downloaded to the distributed architecture via the bus. Based on this architecture, an operating system has been designed to provide communication and input/output support. The message passing communication protocol uses circuit switching and a centralized reconnection control strategy. The communication protocol is composed of two modules: A Local Bus Interface (LBI) that runs on every processing element and a Central Switch Controller (CSC) which executes on a bus master and reconfigures the network topology as required by the user program. The LBI is small, simple, and deadlock free. User reconfiguration requests are interrupt driven, and the CSC can support real-time reconfiguration of the topology without interfering with other communications. An Input/Output Controller (IOC) process runs on the host computer and provides standard library support to each processor in the network. An important feature of the circuit switching communication protocol is that it preserves synchronous communication where processors do not need to store messages and no buffer management is required. Routing overhead occurs only when the circuit is set up, so subsequent messages may flow through the network with a guaranteed bandwidth and a maximum communication latency, which is an important consideration in real-time systems. The routing mechanism is adaptive where communication hot spots may be detected and bypassed. The centralized reconfiguration control strategy and the adaptive routing mechanism provides a basis for a reliable architecture. In the case of a link or processor failure, the routing mechanism is capable of bypassing a faulty component without affecting the application program, and can also redirect messages to a backup processor. Knowledge of the faulty component is required at the CSC only, in contrast to most routing algorithms where either the local or global state of the network is essential at every node. The performance of this communication protocol is compared with Helminen's store-and-forward model [1] running on the FPS T-series hypercube. The results show that the centralized circuit switching protocol provides better performance when a message crosses multiple hops, large message length, and when the algorithm contains temporal locality properties. Dynamic protocols, however, are less desirable for short messages due to the initial connection latency.
Constraints on wide-band radiative changes after a glitch in PSR J1452-6036
Creators: name: Jankowski, F.
name: Keane, E. F.
name: Stappers, B. W.
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: We present high-sensitivity, wide-band observations (704 to 4032 MHz) of the young to middle-aged radio pulsar J1452-6036, taken at multiple epochs before and, serendipitously, shortly after a glitch occurred on 2019 April 27. We obtained the data using the new ultra-wide-bandwidth low-frequency (UWL) receiver at the Parkes radio telescope, and we used Markov Chain Monte Carlo techniques to estimate the glitch parameters robustly. The data from our third observing session began 3 h after the best-fitting glitch epoch, which we constrained to within 4 min. The glitch was of intermediate size, with a fractional change in spin frequency of $270.52(3) \times 10^{-9}$. We measured no significant change in spin-down rate and found no evidence for rapidly-decaying glitch components. We systematically investigated whether the glitch affected any radiative parameters of the pulsar and found that its spectral index, spectral shape, polarisation fractions, and rotation measure stayed constant within the uncertainties across the glitch epoch. However, its pulse-averaged flux density increased significantly by about 10 per cent in the post-glitch epoch and decayed slightly before our fourth observation a day later. We show that the increase was unlikely caused by calibration issues. While we cannot exclude that it was due to refractive interstellar scintillation, it is hard to reconcile with refractive effects. The chance coincidence probability of the flux density increase and the glitch event is low. Finally, we present the evolution of the pulsar's pulse profile across the band. The morphology of its polarimetric pulse profile stayed unaffected to a precision of better than 2 per cent.
description: 11 pages, 5 figures, 3 tables, accepted for publication in MNRAS
Analytical evaluation of the X-ray scattering contribution to imaging degradation in grazing-incidence X-ray telescopes
Creators: name: Spiga, Daniele
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: The focusing performance of X-ray optics (conveniently expressed in terms of HEW, Half Energy Width) strongly depend on both mirrors deformations and photon scattering caused by the microroughness of reflecting surfaces. In particular, the contribution of X-ray Scattering (XRS) to the HEW of the optic is usually an increasing function H(E) of the photon energy E. Therefore, in future hard X-ray imaging telescopes of the future (SIMBOL-X, NeXT, Constellation-X, XEUS), the X-ray scattering could be the dominant problem since they will operate also in the hard X-ray band (i.e. beyond 10 keV). [...] Several methods were proposed in the past years to estimate the scattering contribution to the HEW, dealing with the surface microroughness expressed in terms of its Power Spectral Density (PSD), on the basis of the well-established theory of X-ray scattering from rough surfaces. We faced that problem on the basis on the same theory, but we tried a new approach: the direct, analytical translation of a given surface roughness PSD into a H(E) trend, and - vice versa - the direct translation of a H(E) requirement into a surface PSD. This PSD represents the maximum tolerable microroughness level in order to meet the H(E) requirement in the energy band of a given X-ray telescope. We have thereby found a new, analytical and widely applicable formalism to compute the XRS contribution to the HEW from the surface PSD, provided that the PSD had been measured in a wide range of spatial frequencies. The inverse problem was also solved, allowing the immediate evaluation of the mirror surface PSD from a measured function H(E). The same formalism allows establishing the maximum allowed PSD of the mirror in order to fulfill a given H(E) requirement. [...]
description: 10 pages, 6 figures, published in Astronomy & Astrophysics, sect. "Astronomical Instrumentation". In this version, a typo in two equations has been corrected. After the correction, the other results, formulae and conclusions in the paper remain unchanged
Reply to ``Comment on `On the inconsistency of the Bohm-Gadella theory with quantum mechanics'''
Creators: name: de la Madrid, R.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Quantum Physics (quant-ph)
subject: High Energy Physics - Theory (hep-th)
subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: In this reply, we show that when we apply standard distribution theory to the Lippmann-Schwinger equation, the resulting spaces of test functions would comply with the Hardy axiom only if classic results of Paley and Wiener, of Gelfand and Shilov, and of the theory of ultradistributions were wrong. As well, we point out several differences between the ``standard method'' of constructing rigged Hilbert spaces in quantum mechanics and the method used in Time Asymmetric Quantum Theory.
description: 13 pages
Conformal Manifolds and 3d Mirrors of Argyres-Douglas theories
Creators: name: Carta, Federico
name: Giacomelli, Simone
name: Mekareeya, Noppadol
name: Mininno, Alessandro
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: Argyres-Douglas theories constitute an important class of superconformal field theories in $4$d. The main focus of this paper is on two infinite families of such theories, known as $D^b_p(\mathrm{SO}(2N))$ and $(A_m, D_n)$. We analyze in depth their conformal manifolds. In doing so we encounter several theories of class $\mathcal{S}$ of twisted $A_{\text{odd}}$, twisted $A_{\text{even}}$ and twisted $D$ types associated with a sphere with one twisted irregular puncture and one twisted regular puncture. These models include $D_p(G)$ theories, with $G$ non-simply-laced algebras. A number of new properties of such theories are discussed in detail, along with new SCFTs that arise from partially closing the twisted regular puncture. Moreover, we systematically present the $3$d mirror theories, also known as the magnetic quivers, for the $D^b_p(\mathrm{SO}(2N))$ theories, with $p \geq b$, and the $(A_m, D_n)$ theories, with arbitrary $m$ and $n$. We also discuss the $3$d reduction and mirror theories of certain $D^b_p(\mathrm{SO}(2N))$ theories, with $p < b$, where the former arises from gauging topological symmetries of some $T^σ_ρ[\mathrm{SO}(2M)]$ theories that are not manifest in the Lagrangian description of the latter.
description: v2: added references. JHEP accepted. v1: 61 pages + 3 appendices
The Bouncing Jet: A Newtonian Liquid Rebounding off a Free Surface
Creators: name: Thrasher, Matthew
name: Jung, Sunghwan
name: Pang, Yee Kwong
name: Chuu, Chih-Piao
name: Swinney, Harry L.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Fluid Dynamics (physics.flu-dyn)
subject: FOS: Physical sciences

description: We find that a liquid jet can bounce off a bath of the same liquid if the bath is moving horizontally with respect to the jet. Previous observations of jets rebounding off a bath (e.g. Kaye effect) have been reported only for non-Newtonian fluids, while we observe bouncing jets in a variety of Newtonian fluids, including mineral oil poured by hand. A thin layer of air separates the bouncing jet from the bath, and the relative motion replenishes the film of air. Jets with one or two bounces are stable for a range of viscosity, jet flow rate and velocity, and bath velocity. The bouncing phenomenon exhibits hysteresis and multiple steady states.
description: 9 pages, 7 figures. submitted to Physical Review E
Trusted Node QKD at an Electrical Utility
Creators: name: Evans, Philip G.
name: Alshowkan, Muneer
name: Earl, Duncan
name: Mulkey, Daniel
name: Newell, Raymond
name: Peterson, Glen
name: Safi, Claira
name: Tripp, Justin
name: Peters, Nicholas A.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Challenges facing the deployment of quantum key distribution (QKD) systems in critical infrastructure protection applications include the optical loss-key rate tradeoff, addition of network clients, and interoperability of vendor-specific QKD hardware. Here, we address these challenges and present results from a recent field demonstration of three QKD systems on a real-world electric utility optical fiber network.
description: 10 pages, 8 figures; submitted to IEEE Access
Metal-insulator transition and antiferromagnetism in the generalized Hubbard model: Treatment of correlation effects
Creators: name: Igoshev, P. A.
name: Irkhin, V. Yu.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: The ground state for the half-filled $t-t'$ Hubbard model is treated within the Hartree-Fock approximation and the slave boson approach including correlations. The criterium for the metal-insulator transition in the Slater scenario is formulated using an analytical free-energy expansion in the next-nearest-neighbor transfer integral $t'$ and in direct antiferromagnetic gap $Δ$. The correlation effects are generally demonstrated to favor the first-order transition. For a square lattice with a strong van Hove singularity, accidental close degeneracy of antiferromagnetic and paramagnetic phases is analytically found in a wide parameter region. As a result, there exists an interval of $t'$ values for which the metal-insulator transition is of the first order due to the existence of the van Hove singularity. This interval is very sensitive to model parameters (direct exchange integral) or external parameters. For the simple and body-centered cubic lattices, the transition from the insulator antiferromagnetic state with increasing $t'$ occurs to the phase of an antiferromagnetic metal and is a second-order transition which is followed by a transition to a paramagnetic metal. These results are quantitatively modified when taking into account the intersite Heisenberg interaction, which can induce first-order transitions. A comparison with the Monte Carlo results is performed.
description: 36 pages, final version, considerably corrected
Modelling the Galactic bar using OGLE-II Red Clump Giant Stars
Creators: name: Rattenbury, Nicholas J.
name: Mao, Shude
name: Sumi, Takahiro
name: Smith, Martin C.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Red clump giant stars can be used as distance indicators to trace the mass distribution of the Galactic bar. We use RCG stars from 44 bulge fields from the OGLE-II microlensing collaboration database to constrain analytic tri-axial models for the Galactic bar. We find the bar major axis is oriented at an angle of 24 - 27 degrees to the Sun-Galactic centre line-of-sight. The ratio of semi-major and semi-minor bar axis scale lengths in the Galactic plane x_0, y_0, and vertical bar scale length z_0, is x_0 : y_0 : z_0 = 10 : 3.5 : 2.6, suggesting a slightly more prolate bar structure than the working model of Gerhard (2002) which gives the scale length ratios as x_0 : y_0 : z_0 = 10 : 4 : 3 .
description: 15 pages, 10 figures, accepted for publication in MNRAS. Supplementary material available online: 10 pages, 10 figures
Linearizability: A Typo
Creators: name: Sela, Gal
name: Herlihy, Maurice
name: Petrank, Erez
Publisher: name: arXiv
Year: 2021
Subjects: subject: Distributed, Parallel, and Cluster Computing (cs.DC)
subject: FOS: Computer and information sciences

description: Linearizability is the de facto consistency condition for concurrent objects, widely used in theory and practice. Loosely speaking, linearizability classifies concurrent executions as correct if operations on shared objects appear to take effect instantaneously during the operation execution time. This paper calls attention to a somewhat-neglected aspect of linearizability: restrictions on how pending invocations are handled, an issue that has become increasingly important for software running on systems with non-volatile main memory. Interestingly, the original published definition of linearizability includes a typo (a symbol is missing a prime) that concerns exactly this issue. In this paper we point out the typo and provide an amendment to make the definition complete. We believe that pointing this typo out rigorously and proposing a fix is important and timely.
Longiflagrum Gutu 1995
Creators: name: Stępień, Anna
name: Blazewicz-Paszkowycz, Magdalena
Publisher: name: Zenodo
Year: 2009
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Malacostraca
Tanaidacea
Parapseudidae
Longiflagrum

description: Genus Longiflagrum Guţu, 1995 Type species: Apseudes estuarius Boesch, 1973. Species included: L caeruleus (Boesch, 1973); L. estuarius (Boesch, 1973), L. koyonense (Angsupanich, 2004), L. nasutus (Nunomura, 2005), L. amphibium sp. n.
description: Published as part of Stępień, Anna & Blazewicz-Paszkowycz, Magdalena, 2009, Longiflagrum amphibium, a new estuarine apseudomorph tanaid (Crustacea, Peracarida) from north-western Australia, pp. 161-170 in ZooKeys 18 (18) on page 162, DOI: 10.3897/zookeys.18.154, http://zenodo.org/record/576500
description: {"references": ["Gutu M (1995) A new subfamily and three new genera of Apseudomorpha (Crustacea, Tanaidacea). Travaux du Museum National d'Histoire naturelle \" Grigore Antipa \" 35: 17 - 28.", "Boesch DF (1973) Th ree new tanaids (Crustacea, Tanaidacea) from southern Queensland. Pacific Science 27: 168 - 188.", "Angsupanich S (2004) A new species of Longiflagrum (Tanaidacea, Parapseudidae) from Songkhla Lagoon, Th ailand. Crustaceana 77 (7): 849 - 860.", "Nunomura N (2005) A new species of the genus Apseudes (Tanaidacea: Apseudidae) Okinawa, southern Japan. Contributions from the Toyama Science Museum 313: 25 - 31."]}
Multiplicativity of the maximal output 2-norm for depolarized Werner-Holevo channels
Creators: name: Michalakis, Spyridon
Publisher: name: arXiv
Year: 2007
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We study the multiplicativity of the output 2-norm for depolarized Werner-Holevo channels and show that multiplicativity holds for a product of two identical channels in this class. Moreover, it shown that the depolarized Werner-Holevo channels do not satisfy the entrywise positivity condition introduced by C. King and M.B. Ruskai, which suggests that the main result is non-trivial.
description: 3 pages
The use of the Gabor expansion in computer vision systems
Creators: name: Braithwaite, Richard Neil
Publisher: name: University of British Columbia
Year: 2010

description: This thesis explores the use of the Gabor expansion in computer vision systems. The exploration is performed in two parts: the properties of the Gabor expansion are reviewed, and various image segmentation algorithms whose basis is the Gabor expansion are presented. The first part comprises a review of Gabor's original expansion of a one-dimensional signal [1] and Daugman's two-dimensional generalization [2] [3]. In both cases, important properties are discussed: the optimality of the "elementary function" with respect to minimal uncertainty, and the proper spacing of these functions to ensure a unique Gabor expansion. Methods for solving the Gabor expansion are investigated. Two non-iterative methods are discussed: the "inverse of the overlap matrix", and Bastiaans' "biorthonormal projection function" [4] [5]. One iterative method, Daugman's "steepest descent" [3], is reviewed. Two new iterative methods, the "warping method" and the "locally biorthonormal projection function," are presented. The complexity and convergence properties of these new methods are intermediate to Daugman's and Bastiaans' methods. In the second part of this thesis, Gabor expansion-based segmentation algorithms are presented. The properties of these algorithms—edge detection, texture segmentation, motion segmentation, and segmentation by depth—are investigated. It is shown that "local measures", which are by-products of the segmentation algorithms, can be used to both segment images and to provide three-dimensional descriptions of viewed objects. It is concluded that the Gabor expansion is a useful preprocessing step for computer vision systems.
Deutsche Gewerkschaften und europäische Integration: Forschungsphasen, Desiderate und Perspektiven aus historischer Sicht
Creators: name: Mittag, Jürgen
Publisher: name: Moving the Social
Year: 2015

description: The article delineates the evolution of academic literature and research on the linkages between German trade unions and European integration. First studies have been published by social scientists in the 1950s revealing the potential of national trade unions in the course of European integration. Whereas a limited number of studies has been issued in the 1960s, research in the 1970s and 80s for the most part has covered trade union activities at the European level. From the 1990s up to the present research has predominantly focussed on the Europeanisation of trade unions comparing different strategies and attitudes of national unions towards European integration. Reflecting on the status quo the contribution concludes that German trade unions’ linkages towards European integration have attracted growing academic interest but were hardly examined so far as a subject of historical research. Exploring the further articles of this issue the author underlines the necessity to analyse indepth to what extent national trade unions have reacted to the process of European integration.
description: Moving the Social, Vol 42 (2009): Deutsche Gewerkschaften und europäische Integration im 20. Jahrhundert
Self-Supervised Learning of Audio Representations from Permutations with Differentiable Ranking
Creators: name: Carr, Andrew N
name: Berthet, Quentin
name: Blondel, Mathieu
name: Teboul, Olivier
name: Zeghidour, Neil
Publisher: name: arXiv
Year: 2021
Subjects: subject: Sound (cs.SD)
subject: Artificial Intelligence (cs.AI)
subject: Audio and Speech Processing (eess.AS)
subject: FOS: Computer and information sciences
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: Self-supervised pre-training using so-called "pretext" tasks has recently shown impressive performance across a wide range of modalities. In this work, we advance self-supervised learning from permutations, by pre-training a model to reorder shuffled parts of the spectrogram of an audio signal, to improve downstream classification performance. We make two main contributions. First, we overcome the main challenges of integrating permutation inversions into an end-to-end training scheme, using recent advances in differentiable ranking. This was heretofore sidestepped by casting the reordering task as classification, fundamentally reducing the space of permutations that can be exploited. Our experiments validate that learning from all possible permutations improves the quality of the pre-trained representations over using a limited, fixed set. Second, we show that inverting permutations is a meaningful pretext task for learning audio representations in an unsupervised fashion. In particular, we improve instrument classification and pitch estimation of musical notes by reordering spectrogram patches in the time-frequency space.