cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
The Ramsey property implies no mad families
Creators: name: Schrittesser, David
name: Törnquist, Asger
Publisher: name: arXiv
Year: 2019
Subjects: subject: Logic (math.LO)
subject: FOS: Mathematics
subject: 03E05, 03E15, 03E25, 03E35, 03E60

description: We show that if all collections of infinite subsets of $\N$ have the Ramsey property, then there are no infinite maximal almost disjoint (mad) families. This solves a long-standing problem going back to Mathias \cite{mathias}. The proof exploits an idea which has its natural roots in ergodic theory, topological dynamics, and invariant descriptive set theory: We use that a certain function associated to a purported mad family is invariant under the equivalence relation $E_0$, and thus is constant on a "large" set. Furthermore we announce a number of additional results about mad families relative to more complicated Borel ideals.
description: 10 pages; fixed a mistake in Theorem 4.4
Magma ascent in Australian intraplate volcanoes
Creators: name: England, Thomas Robert
Publisher: name: Macquarie University
Year: 2023
Subjects: classificationCode: 370503
subject: Igneous and metamorphic petrology

description: North-east and South-east Australia host basaltic volcanic fields which are still considered active. Despite this, little work has been undertaken to estimate magma ascent rates and subsequent warning times associated with any future eruptions. A volcanological, petrological and textural study was conducted on Mount Quincan, one of the youngest known volcanoes in the Atherton Basalt Province. This study focused on assessing the interaction of mantle xenoliths with the host magma to calculate magma ascent rates using two differing approaches: 1) A study of xenolith morphology and settling rate. 2) An analysis of the dissolution reaction of orthopyroxene with the host magma. The volcanological study identified an abundance of mantle xenoliths throughout the stratigraphy. The study of settling rates indicated ascent rates up to 2.24 ms-1 (a minimum ascent time of 6 hours from 50 km depth). The study of orthopyroxene dissolution suggests ascent rates of up to 64 ms-1 / 13 minutes ascent duration from 50 km depth. Both methods indicate high ascent rates and low warning time for any future eruptions. This combination of rapid ascent and the proximity of the volcanic fields to population centres suggests a greater focus should be placed on volcanic hazard mitigation in Australia.
3-D SPH simulations of the FUOR flares in the clumpy accretion model
Creators: name: Demidova, Tatiana V.
name: Grinin, Vladimir P.
Publisher: name: arXiv
Year: 2023
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences
subject: J.2.3
subject: 85-04

description: One of the early hypotheses about the origin of FUOR outbursts explains them by the fall of gas clumps from the remnants of protostellar clouds onto protoplanetary disks surrounding young stars (Hartmann and Kenyon 1985). To calculate the consequences of such an event we make 3D hydrodynamic simulations by SPH method. It is shown that the fall of the clump on the disk in the vicinity of the star actually causes a burst of the star's accretion activity, resembling in its characteristics the flares of known FUORs. In the region of incidence, an inhomogeneous gas ring is formed, which is inclined relative to the outer disk. During several revolutions around the star, this ring combines with the inner disk and forms a tilted disk. In the process of evolution, the inner disk expands, and its inclination relative to the outer disk decreases. After 100 revolutions, the angle of inclination is a few degrees. This result is of interest in connection with the discovery in recent years of protoplanetary disks, the inner region of which is inclined relative to the outer one. Such structures are usually associated with the existence in the vicinity of a star of a massive body (planet or brown dwarf), whose orbit is inclined relative to the plane of the disk. The results of our modeling indicate the possibility of an alternative explanation for this phenomenon.
description: 11 pages, 9 figures
Minimal definable graphs of definable chromatic number at least three
Creators: name: Carroy, Raphael
name: Miller, Benjamin D.
name: Schrittesser, David
name: Vidnyanszky, Zoltan
Publisher: name: arXiv
Year: 2019
Subjects: subject: Logic (math.LO)
subject: Combinatorics (math.CO)
subject: FOS: Mathematics

description: We show that there is a Borel graph on a standard Borel space of Borel chromatic number three that admits a Borel homomorphism to every analytic graph on a standard Borel space of Borel chromatic number at least three. Moreover, we characterize the Borel graphs on standard Borel spaces of vertex-degree at most two with this property, and show that the analogous result for digraphs fails.
New developments for dual methods in lattice field theory at non-zero density
Creators: name: Gattringer, Christof
Publisher: name: arXiv
Year: 2014
Subjects: subject: High Energy Physics - Lattice (hep-lat)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: In recent years the complex action problem of lattice field theory at finite density was overcome for several system by mapping them to dual variables (flux lines and surfaces). We illustrate this mapping for the case of the U(1) gauge Higgs system and present some representative physics results for this model. Conceptual challenges such as spectroscopy in the dual approach, as well as algorithmic developments are discussed and related ideas for systems with fermions are addressed. Models where the dual variables approach solves the complex action problem can serve as reference systems for other approaches to finite density lattice field theory and we discuss some examples. Finally we address the strategy of a partial dualization in certain limits, e.g., for strong coupling and large mass.
Finite-size effects on the cluster expansions for quantum gases in restricted geometries
Creators: name: Dey, Soumi
name: Manchala, Prathyush
name: Basu, Srijit
name: Banerjee, Debshikha
name: Biswas, Shyamal
Publisher: name: arXiv
Year: 2019
Subjects: subject: Quantum Gases (cond-mat.quant-gas)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We have analytically obtained 1-particle density matrices for ideal Bose and Fermi gases in both the 3-D box geometries and the harmonically trapped geometries for the entire range of temperature. We have obtained quantum cluster expansions of the grand free energies in closed forms for the same systems in the restricted geometries. We have proposed a theorem (with a proof) about the generic form of the quantum cluster integral. We also have considered short ranged interactions in our analyses for the quasi 1-D cases of Bose and Fermi gases in the box geometries. Our theoretical results are exact, and are directly useful for understanding finite-size effects on quantum cluster expansion of Bose and Fermi gases in the restricted geometries. Our results would be relevant in the context of experimental study of spatial correlations in ultra-cold systems of dilute Bose and Fermi gases of alkali atoms (i) in 3-D magneto-optical box traps with quasi-uniform potential around the center [1], and (ii) in 3-D harmonic traps [2, 3].
description: 12 pages, 6 figures
Learned Point Cloud Geometry Compression
Creators: name: Wang, Jianqiang
name: Zhu, Hao
name: Ma, Zhan
name: Chen, Tong
name: Liu, Haojie
name: Shen, Qiu
Publisher: name: arXiv
Year: 2019
Subjects: subject: Computer Vision and Pattern Recognition (cs.CV)
subject: Image and Video Processing (eess.IV)
subject: FOS: Computer and information sciences
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: This paper presents a novel end-to-end Learned Point Cloud Geometry Compression (a.k.a., Learned-PCGC) framework, to efficiently compress the point cloud geometry (PCG) using deep neural networks (DNN) based variational autoencoders (VAE). In our approach, PCG is first voxelized, scaled and partitioned into non-overlapped 3D cubes, which is then fed into stacked 3D convolutions for compact latent feature and hyperprior generation. Hyperpriors are used to improve the conditional probability modeling of latent features. A weighted binary cross-entropy (WBCE) loss is applied in training while an adaptive thresholding is used in inference to remove unnecessary voxels and reduce the distortion. Objectively, our method exceeds the geometry-based point cloud compression (G-PCC) algorithm standardized by well-known Moving Picture Experts Group (MPEG) with a significant performance margin, e.g., at least 60% BD-Rate (Bjontegaard Delta Rate) gains, using common test datasets. Subjectively, our method has presented better visual quality with smoother surface reconstruction and appealing details, in comparison to all existing MPEG standard compliant PCC methods. Our method requires about 2.5MB parameters in total, which is a fairly small size for practical implementation, even on embedded platform. Additional ablation studies analyze a variety of aspects (e.g., cube size, kernels, etc) to explore the application potentials of our learned-PCGC.
description: 13 pages
EO4Polar Polar Amplification session: presentations and summary
Creators: name: Davy, Richard
name: Grist, Hannah
name: Olsen, Steffen M.
Publisher: name: Zenodo
Year: 2020

description: Blue-Action organised a discussion session in the European Space Agency/European Commission conference EO4Polar in October 2020. The session was chaired by Steffen Olsen, DMI, and included presentations by Richard Davy, Nansen Centre, Lily Hahn, University of Washington, Jean-Baptiste Sallee, LOCEAN and Doug Smith, Met Office. A summary of the key messages and recommendations from the discussion are also summarised here.
Oertlichkeit der Ermordung des General Auerswald und Fürsten Lichnowsky; [1848]
Creators: name: (:Unav)
Publisher: name: Universitätsbibliothek der Ludwig-Maximilians-Universität München
Year: 2018

description: Vorlageform der Veröffentlichungsangabe: Verlag v. J. A. Wagner kl. Hirschgraben N. 2. neu in Frankfurt a/M
Monitoring of multi-frequency polarization of gamma-ray bright AGNs
Creators: name: Lee, Sang-Sung
name: Han, Myounghee
name: Kang, Sincheol
name: Seen, Jungmin
name: Byun, Do-Young
name: Baek, Jun-Hyun
name: Kim, Soon-Wook
name: Kim, Jeong-Sook
Publisher: name: arXiv
Year: 2013
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We started two observing programs with the Korean VLBI Network (KVN) monitoring changes in the flux density and polarization of relativistic jets in gamma-ray bright AGNs simultaneously at 22, 43, 86, 129 GHz. One is a single-dish weekly-observing program in dual polarization with KVN 21-m diameter radio telescopes beginning in 2011 May. The other is a VLBI monthly-observing program with the three-element VLBI network at an angular resolution range of 1.0--9.2 mas beginning in 2012 December. The monitoring observations aim to study correlation of variability in gamma-ray with that in radio flux density and polarization of relativistic jets when they flare up. These observations enable us to study the origin of the gamma-ray flares of AGNs.
description: 4 pages, 4 figures, Proceedings of the conference "The innermost regions of relativistic jets and their magnetic fields", Granada, Spain
On formal degrees of unipotent representations
Creators: name: Feng, Yongqi
name: Opdam, Eric
name: Solleveld, Maarten
Publisher: name: arXiv
Year: 2019
Subjects: subject: Representation Theory (math.RT)
subject: FOS: Mathematics
subject: 22E50 (11S37, 20G25)

description: Let G be a reductive p-adic group which splits over an unramified extension of the ground field. Hiraga, Ichino and Ikeda conjectured that the formal degree of a square-integrable G-representation $π$ can be expressed in terms of the adjoint $γ$-factor of the enhanced L-parameter of $π$. A similar conjecture was posed for the Plancherel densities of tempered irreducible G-representations. We prove these conjectures for unipotent G-representations. We also derive explicit formulas for the involved adjoint $γ$-factors.
title: Effects of different herbicide treatments for common ragweed control at different phenological stages under field conditions (Hungary)
Creators: name: Kazinczi, Gabriella
name: Máté, Sándor
Publisher: name: Julius Kühn-Institut
Year: 2016

description: Julius-Kühn-Archiv, Nr. 455 (2016): HALT Ambrosia - final project report and general publication of project findings
Improved description of the pion-nucleon scattering phenomenology in covariant baryon chiral perturbation theory
Creators: name: Alarcón, Jose Manuel
Publisher: name: arXiv
Year: 2014
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: We highlight some of the recent advances in the application of chiral effective field theory (chiral EFT) with baryons to the $πN$ scattering process. We recall some problems that cast doubt on the applicability of chiral EFT to $πN$ and show how the relativistic formalism, once the $Δ(1232)$-resonance is included as an explicit degree of freedom, solves these issues. Finally it is shown how this approach can be used to extract the $σ$-terms from phenomenological information.
description: Contribution to the 13th International Conference on Meson-Nucleon Physics and the Structure of the Nucleon (MENU 2013), Rome, Italy, 30 September - October 4, 2013. 4 pages, 1 figure
The Accretion Mode in Sub-Eddington Supermassive Black Holes: Getting into the Central Parsecs of Andromeda
Creators: name: Alig, C.
name: Prieto, A.
name: Blaña, M.
name: Frischman, M.
name: Metzl, C.
name: Burkert, A.
name: Zier, O.
name: Streblyanska, A.
Publisher: name: arXiv
Year: 2023
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: The inner kiloparsec regions surrounding sub-Eddington (luminosity less than 10$^{-3}$ in Eddington units, L$_{Edd}$) supermassive black holes (BHs) often show a characteristic network of dust filaments that terminate in a nuclear spiral in the central parsecs. Here we study the role and fate of these filaments in one of the least accreting BHs known, M31 (10$^{-7}$ L$_{Edd}$) using hydrodynamical simulations. The evolution of a streamer of gas particles moving under the barred potential of M31 is followed from kiloparsec distance to the central parsecs. After an exploratory study of initial conditions, a compelling fit to the observed dust/ionized gas morphologies and line-of-sight velocities in the inner hundreds of parsecs is produced. After several million years of streamer evolution, during which friction, thermal dissipation, and self-collisions have taken place, the gas settles into a disk tens of parsecs wide. This is fed by numerous filaments that arise from an outer circumnuclear ring and spiral toward the center. The final configuration is tightly constrained by a critical input mass in the streamer of several 10$^3$ M$_{\odot}$ (at an injection rate of 10$^{-4}$ M$_{\odot}$ yr$^{-1}$); values above or below this lead to filament fragmentation or dispersion respectively, which are not observed. The creation of a hot gas atmosphere in the region of $\sim$10$^6$ K is key to the development of a nuclear spiral during the simulation. The final inflow rate at 1pc from the center is $\sim$1.7 $\times$ 10$^{-7}$ M$_{\odot}$ yr$^{-1}$, consistent with the quiescent state of the M31 BH.
description: 13 pages, 11 figures
Horse race of weekly idiosyncratic momentum strategies with respect to various risk metrics: Evidence from the Chinese stock market
Creators: name: Shi, Huai-Long
name: Zhou, Wei-Xing
Publisher: name: arXiv
Year: 2019
Subjects: subject: Statistical Finance (q-fin.ST)
subject: FOS: Economics and business

description: This paper focuses on the horse race of weekly idiosyncratic momentum (IMOM) with respect to various idiosyncratic risk metrics. Using the A-share individual stocks in the Chinese market from January 1997 to December 2017, we first evaluate the performance of the weekly momentum based on raw returns and idiosyncratic returns, respectively. After that the univariate portfolio analysis is conducted to investigate the return predictability with respect to various idiosyncratic risk metrics. Further, we perform a comparative study on the performance of the IMOM portfolios with respect to various risk metrics. At last, we explore the possible explanations to IMOM as well as risk based IMOM portfolios. We find that 1) there are prevailing contrarian effect and IMOM effect for the whole sample; 2) the negative relations exist between most of the idiosyncratic risk metrics and the cross-sectional stock returns, and better performance is linked to idiosyncratic volatility (IVol) and maximum drawdowns (IMDs); 3) additionally, the IVol-based and IMD-based IMOM portfolios exhibit better explanatory power to the IMOM portfolios with respect to other risk metrics; 4) finally, higher profitability of IMOM as well as IVol-based and IMD-based IMOM portfolios is found to be related to upside market states, high levels of liquidity and high levels of investor sentiment.
description: 36 pages including 15 tables
A Late-Time Flattening of Light Curves in Gamma-Ray Burst Afterglows
Creators: name: Sironi, Lorenzo
name: Giannios, Dimitrios
Publisher: name: arXiv
Year: 2013
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: The afterglow emission from Gamma-Ray Bursts (GRBs) is usually interpreted as synchrotron radiation from relativistic electrons accelerated at the GRB external shock, that decelerates from ultra-relativistic to non-relativistic speeds as it sweeps up the surrounding medium. We investigate the temporal decay of the emission from GRB afterglows at late times, when the bulk of the shock-accelerated electrons are non-relativistic. For a uniform circumburst medium, we show that such "deep Newtonian phase" begins at t_{DN} ~ 3 epsilon_{e,-1}^{5/6} t_{ST}, where t_{ST} marks the transition of the blast wave to the non-relativistic spherically-symmetric Sedov-Taylor solution, and epsilon_e = 0.1 epsilon_{e,-1} quantifies the amount of shock energy transferred to the post-shock electrons. For typical parameters, the deep Newtonian stage starts ~ 0.5-several years after the GRB. The radio flux in this phase decays as F_nu ~ t^{-3(p+1)/10}, with decay slope between -0.9 and -1.2, for a power-law distribution of shock-accelerated electrons with index 2 < p < 3. This is shallower than the commonly assumed scaling F_nu ~ t^{-3(5p-7)/10} (with decay slope between -0.9 and -2.4) derived by Frail et al. (2000), which only applies if the GRB shock is non-relativistic, but the electron distribution still peaks at ultra-relativistic energies (a regime that is relevant for a narrow time interval, and only if t_{DN} > t_{ST}, or epsilon_e > 0.03). We discuss how the deep Newtonian phase can be reliably used for GRB calorimetry, and we comment on the good detection prospects of trans-relativistic blast waves at 0.1-10 GHz with EVLA and LOFAR.
description: 8 pages, 2 figures, submitted to ApJ
BRST technique for the cosmological density matrix
Creators: name: Barvinsky, Andrei O.
Publisher: name: arXiv
Year: 2013
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: The microcanonical density matrix in closed cosmology has a natural definition as a projector on the space of solutions of Wheeler-DeWitt equations, which is motivated by the absence of global non-vanishing charges and energy in spatially closed gravitational systems. Using the BRST/BFV formalism in relativistic phase space of gauge and ghost variables we derive the path integral representation for this projector and the relevant statistical sum. This derivation circumvents the difficulties associated with the open algebra of noncommutative quantum Dirac constraints and the construction/regularization of the physical inner product in the subspace of BRS singlets. This inner product is achieved via the Batalin-Marnelius gauge fixing in the space of BRS-invariant states, which in its turn is shown to be a result of truncation of the BRST/BFV formalism to the "matter" sector of relativistic phase space.
description: 13 pages, LaTeX
Cali-Sketch: Stroke Calibration and Completion for High-Quality Face Image Generation from Human-Like Sketches
Creators: name: Xia, Weihao
name: Yang, Yujiu
name: Xue, Jing-Hao
Publisher: name: arXiv
Year: 2019
Subjects: subject: Computer Vision and Pattern Recognition (cs.CV)
subject: FOS: Computer and information sciences

description: Image generation has received increasing attention because of its wide application in security and entertainment. Sketch-based face generation brings more fun and better quality of image generation due to supervised interaction. However, when a sketch poorly aligned with the true face is given as input, existing supervised image-to-image translation methods often cannot generate acceptable photo-realistic face images. To address this problem, in this paper we propose Cali-Sketch, a human-like-sketch to photo-realistic-image generation method. Cali-Sketch explicitly models stroke calibration and image generation using two constituent networks: a Stroke Calibration Network (SCN), which calibrates strokes of facial features and enriches facial details while preserving the original intent features; and an Image Synthesis Network (ISN), which translates the calibrated and enriched sketches to photo-realistic face images. In this way, we manage to decouple a difficult cross-domain translation problem into two easier steps. Extensive experiments verify that the face photos generated by Cali-Sketch are both photo-realistic and faithful to the input sketches, compared with state-of-the-art methods.
description: Accepted to Neurocomputing
Comparative analysis of mathematical formulations for the two-dimensional guillotine cutting problem
Creators: name: Becker, Henrique
name: Martin, Mateus
name: Araujo, Olinto
name: Buriol, Luciana S.
name: Morabito, Reinaldo
Publisher: name: arXiv
Year: 2023
Subjects: subject: Optimization and Control (math.OC)
subject: Discrete Mathematics (cs.DM)
subject: Data Structures and Algorithms (cs.DS)
subject: Mathematical Software (cs.MS)
subject: FOS: Mathematics
subject: FOS: Computer and information sciences
subject: G.2.0
subject: 90-02

description: About ten years ago, a paper proposed the first integer linear programming formulation for the constrained two-dimensional guillotine cutting problem (with unlimited cutting stages). Since, six other formulations followed, five of them in the last two years. This spike of interest gave no opportunity for a comprehensive comparison between the formulations. We review each formulation and compare their empirical results over instance datasets of the literature. We adapt most formulations to allow for piece rotation. The possibility of adaptation was already predicted but not realized by the prior work. The results show the dominance of pseudo-polynomial formulations until the point instances become intractable by them, while more compact formulations keep achieving good primal solutions. Our study also reveals a small but consistent advantage of the Gurobi solver over the CPLEX solver in our context; that the choice of solver hardly benefits one formulation over another; and a mistake in the generation of the T instances, which should have the same optima with or without guillotine cuts. Our study also proposes hybridising the most recent formulation with a prior formulation for a restricted version of the problem. The hybridisations show a reduction of about 20% of the branch-and-bound time thanks to the symmetries broken by the hybridisation.
description: 23 pages, 7 tables, 3 figures
Tidal Response and Shape of Hot Jupiters
Creators: name: Wahl, Sean M.
name: Thorngren, Daniel
name: Lu, Tiger
name: Militzer, Burkhard
Publisher: name: arXiv
Year: 2023
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: FOS: Physical sciences

description: We study the response of hot Jupiters to a static tidal perturbation using the Concentric MacLaurin Spheroid (CMS) method. For strongly irradiated planets, we first performed radiative transfer calculations to relate the planet's equilibrium temperature, T_eq, to its interior entropy. We then determined the gravity harmonics, shape, moment of inertia, and the static Love numbers for a range of two-layer interior models that assume a rocky core plus a homogeneous and isentropic envelope composed of hydrogen, helium, and heavier elements. We identify general trends and then study HAT-P-13b, the WASP planets 4b, 12b, 18b, 103b, and 121b, as well as Kepler-75b and CoRot-3b. We compute the Love numbers, k_nm, and transit radius correction, Delta R, which we compare with predictions in the literature. We find that the Love number, k_22, of tidally locked giant planets cannot exceed the value 0.6, and that the high T_eq consistent with strongly irradiated hot Jupiters tend %lead to further lower k_22. While most tidally locked planets are well described by a linear-regime response of k_22 = 3 J_2/q_0 (where q_0 is the rotation parameter of the gravitational potential), for extreme cases such as WASP-12b, WASP-103b and WASP-121b, nonlinear effects can account for over 10% of the predicted k_22. k_22 values larger than 0.6, as they have been reported for planets WASP-4b and HAT-P13B, cannot result from a static tidal response without extremely rapid rotation, and thus are inconsistent with their expected tidally-locked state.
description: 17 pages, 13 figures, 3 tables
Can the Elliptic Billiard Still Surprise Us?
Creators: name: Reznik, Dan
name: Garcia, Ronaldo
name: Koiller, Jair
Publisher: name: arXiv
Year: 2019
Subjects: subject: Dynamical Systems (math.DS)
subject: Computational Geometry (cs.CG)
subject: Robotics (cs.RO)
subject: Algebraic Geometry (math.AG)
subject: FOS: Mathematics
subject: FOS: Computer and information sciences
subject: 37-40, 51N20, 51M04, 51-04

description: Can any secrets still be shed by that much studied, uniquely integrable, Elliptic Billiard? Starting by examining the family of 3-periodic trajectories and the loci of their Triangular Centers, one obtains a beautiful and variegated gallery of curves: ellipses, quartics, sextics, circles, and even a stationary point. Secondly, one notices this family conserves an intriguing ratio: Inradius-to-Circumradius. In turn this implies three conservation corollaries: (i) the sum of bounce angle cosines, (ii) the product of excentral cosines, and (iii) the ratio of excentral-to-orbit areas. Monge's Orthoptic Circle's close relation to 4-periodic Billiard trajectories is well-known. Its geometry provided clues with which to generalize 3-periodic invariants to trajectories of an arbitrary number of edges. This was quite unexpected. Indeed, the Elliptic Billiard did surprise us!
description: 19 pages, 16 figures
Modeling Based on Elman Wavelet Neural Network for Class-D Power Amplifiers
Creators: name: Wang, Li
name: Shao, Jie
name: Zhong, Yaqin
name: Zhao, Weisong
name: Malekian, Reza
Publisher: name: arXiv
Year: 2013
Subjects: subject: Neural and Evolutionary Computing (cs.NE)
subject: FOS: Computer and information sciences

description: In Class-D Power Amplifiers (CDPAs), the power supply noise can intermodulate with the input signal, manifesting into power-supply induced intermodulation distortion (PS-IMD) and due to the memory effects of the system, there exist asymmetries in the PS-IMDs. In this paper, a new behavioral modeling based on the Elman Wavelet Neural Network (EWNN) is proposed to study the nonlinear distortion of the CDPAs. In EWNN model, the Morlet wavelet functions are employed as the activation function and there is a normalized operation in the hidden layer, the modification of the scale factor and translation factor in the wavelet functions are ignored to avoid the fluctuations of the error curves. When there are 30 neurons in the hidden layer, to achieve the same square sum error (SSE) $ε_{min}=10^{-3}$, EWNN needs 31 iteration steps, while the basic Elman neural network (BENN) model needs 86 steps. The Volterra-Laguerre model has 605 parameters to be estimated but still can't achieve the same magnitude accuracy of EWNN. Simulation results show that the proposed approach of EWNN model has fewer parameters and higher accuracy than the Volterra-Laguerre model and its convergence rate is much faster than the BENN model.
Estimation of Minkowski tensors from digital grey-scale images
Creators: name: Svane, Anne Marie
Publisher: name: arXiv
Year: 2014
Subjects: subject: Statistics Theory (math.ST)
subject: FOS: Mathematics
subject: 62H35

description: It has been shown that local algorithms based on grey-scale images sometimes lead to asymptotically unbiased estimators for surface area and integrated mean curvature. This paper extends the results to estimators for Minkowski tensors. In particular, asymptotically unbiased local algorithms for estimation of all volume and surface tensors and certain mean curvature tensors are given. This requires an extension of the known asymptotic formulas to estimators with position dependent weights.
description: 15 pages
Probleme des Pfarrernachwuchses in der Evang. Kirche Lutherischen Bekenntnisses in Brasilien
Creators: name: Brakemeier, Gottfried
Publisher: name: Lutherische Kirche in der Welt
Year: 1970

description: Lutherische Kirche in der Welt, Bd. 21 (1974): Lutherische Kirche in der Welt, Band 21
Global solutions to stochastic wave equations with superlinear coefficients
Creators: name: Millet, Annie
name: Sanz-Solé, Marta
Publisher: name: arXiv
Year: 2019
Subjects: subject: Probability (math.PR)
subject: FOS: Mathematics
subject: 60H15, 60G60, 35R60, 60G17

description: We prove existence and uniqueness of a random field solution $(u(t,x); (t,x)\in [0,T]\times \mathbb{R}^d)$ to a stochastic wave equation in dimensions $d=1,2,3$ with diffusion and drift coefficients of the form $|z| \big( \ln_+(|z|) \big)^a$ for some $a>0$. The proof relies on a sharp analysis of moment estimates of time and space increments of the corresponding stochastic wave equation with globally Lipschitz coefficients. We give examples of spatially correlated Gaussian driving noises where the results apply.
description: 43 pages
Cosmographic analysis of the equation of state of the universe through Padé approximations
Creators: name: Gruber, Christine
name: Luongo, Orlando
Publisher: name: arXiv
Year: 2013
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: Cosmography is used in cosmological data processing in order to constrain the kinematics of the universe in a model-independent way, providing an objective means to evaluate the agreement of a model with observations. In this paper, we extend the conventional methodology of cosmography employing Taylor expansions of observables by an alternative approach using Padé approximations. Due to the superior convergence properties of Padé expansions, it is possible to improve the fitting analysis to obtain numerical values for the parameters of the cosmographic series. From the results, we can derive the equation of state parameter of the universe and its first derivative and thus acquire information about the thermodynamic state of the universe. We carry out statistical analyses using observations of the distance modulus of type 1a supernovae, provided by the union 2.1 compilation of the supernova cosmology project, employing a Markov chain Monte Carlo approach with an implemented Metropolis algorithm. We compare the results of the original Taylor approach to the newly introduced Padé formalism. The analyses show that experimental data constrain the observable universe well, finding an accelerating universe and a positive jerk parameter. We demonstrate that the Padé convergence radii are greater than standard Taylor convergence radii, and infer a lower limit on the acceleration of the universe solely by requiring the positivity of the Padé expansion. We obtain fairly good agreement with the Planck results, confirming the $Λ$CDM model at small redshifts, although we cannot exclude a dark energy density varying in time with negligible speed of sound.
description: 12 pages, 6 figures
Cambrian combinatorics on quiver representations (type A)
Creators: name: Barnard, Emily
name: Gunawan, Emily
name: Meehan, Emily
name: Schiffler, Ralf
Publisher: name: arXiv
Year: 2019
Subjects: subject: Representation Theory (math.RT)
subject: Combinatorics (math.CO)
subject: Rings and Algebras (math.RA)
subject: FOS: Mathematics
subject: 05E10, 13F60, 16G20, 16G70

description: This paper presents a geometric model of the Auslander-Reiten quiver of a type A quiver together with a stability function for which all indecomposable modules are stable. We also introduce a new Catalan object which we call a maximal almost rigid representation. We show that its endomorphism algebra is a tilted algebra of type A. We define a partial order on the set of maximal almost rigid representations and use our new geometric model to show that this partial order is a Cambrian lattice.
description: 28 pages, 16 figures. Comments are welcome
Probing the gaseous disk of T Tau N with CN 5-4 lines
Creators: name: Podio, L.
name: Kamp, I.
name: Codella, C.
name: Nisini, B.
name: Aresu, G.
name: Brittain, S.
name: Cabrit, S.
name: Dougados, C.
name: Grady, C.
name: Meijerink, R.
name: Sandell, G.
name: Spaans, M.
name: Thi, W. -F.
name: White, G. J.
name: Woitke, P.
Publisher: name: arXiv
Year: 2014
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We present spectrally resolved Herschel/HIFI observations of the young multiple system T Tau in atomic and molecular lines. While CO, H2O, [C II], and SO lines trace the envelope and the outflowing gas up to velocities of 33 km/s with respect to systemic, the CN 5-4 hyperfine structure lines at 566.7, 566.9 GHz show a narrow double-peaked profile centered at systemic velocity, consistent with an origin in the outer region of the compact disk of T Tau N. Disk modeling of the T Tau N disk with the thermo-chemical code ProDiMo produces CN line fluxes and profiles consistent with the observed ones and constrain the size of the gaseous disk (R_out = 110 (+10, -20) AU) and its inclination (i = 25 \pm 5 degree). The model indicates that the CN lines originate in a disk upper layer at 40-110 AU from the star, which is irradiated by the stellar UV field and heated up to temperatures of 50-700 K. With respect to previously observed CN 2-1 millimeter lines, the CN 5-4 lines appear to be less affected by envelope emission, due to their larger critical density and excitation temperature. Hence, high-J CN lines are a unique confusion-free tracer of embedded disks, such as the disk of T Tau N.
description: 6 pages, 3 figures, accepted for publication on ApJ Letters
A Becker-Döring type model for cell polarization
Creators: name: Pohl, Lorena
name: Niethammer, Barbara
Publisher: name: arXiv
Year: 2023
Subjects: subject: Analysis of PDEs (math.AP)
subject: FOS: Mathematics

description: We propose a model for cell polarization based on the Becker-Döring equations with the first coagulation coefficient equal to zero. We show convergence to equilibrium for power-law coagulation and fragmentation rates and obtain a loss of mass in the limit $t \rightarrow \infty$ depending on the initial mass and the relative strengths of the coagulation and fragmentation processes. In the case of linear rates, we further show that large clusters evolve in a self-similar manner at large times by comparing limits of appropriately rescaled solutions in different spaces.
description: 24 pages
MORALITAS DALAM TINDAKAN MEDIS YANG DILAKUKAN OLEH DOKTER BERDASARKAN PRINSIP BIOETIKA
Creators: name: Fernando, Bella Agatha
Publisher: name: Zenodo
Year: 2023

description: Secara umum masyarakat mengharapkan setiap orang untuk melakukan sesuatu yang benar, termasuk memenuhi tugas-tugas moral mereka. Konsep moralitas yang penulis gunakan pada penelitian ini diharapkan akan mampu mengabstraksikan hubungan-hubungan personal yang di dalamnya seseorang telah melakukan kehendak baik atau kewajibannya namun hasil dari perbuatan tersebut tidak memiliki hasil yang baik. Maka nilai moralitas di sini dapat digunakan sebagai prasyarat adanya keadilan yang akan tampil sebagai suatu kewajiban yang menuntut bahwa pembatasan-pembatasan tersebut harus diperhatikan dalam pelaksanaannya. Karena dalam tujuan hukum, hal yang utama adalah keadilan dan hal tersebut merupakan suatu elemen tertinggi.
Relation of Gravity, Winds, and the Moment of Inertia of Jupiter and Saturn
Creators: name: Militzer, Burkhard
name: Hubbard, William B.
Publisher: name: arXiv
Year: 2023
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: FOS: Physical sciences

description: We study the relationship of zonal gravity coefficients, J_2n, zonal winds, and axial moment of inertia (MoI) by constructing models for the interiors of giant planets. We employ the nonperturbative concentric Maclaurin spheroid (CMS) method to construct both physical (realistic equation of state and barotropes) and abstract (small number of constant-density spheroids) interior models. We find that accurate gravity measurements of Jupiter's and Saturn's J_2, J_4, and J_6 by Juno and Cassini spacecrafts do not uniquely determine the MoI of either planet but do constrain it to better than 1%. Zonal winds (or differential rotation, DR) then emerge as the leading source of uncertainty. For Saturn, they are predicted to decrease the MoI by 0.4% because they reach a depth of ~9000 km while on Jupiter, they appear to reach only ~3000 km. We thus predict DR to affect Jupiter's MoI by only 0.01%, too small by one order of magnitude to be detectable by the Juno spacecraft. We find winds primarily affect the MoI indirectly via the gravity harmonic J_6 while direct contributions are much smaller because the effects of pro- and retrograde winds cancel. DR contributes +6% and -0.8% to Saturn's and Jupiter's J_6 value, respectively. This changes the J_6 contribution that comes from the uniformly rotating bulk of the planet that correlates most strongly with the predicted MoI. With our physical models, we predict Jupiter's MoI to be 0.26393+-0.00001. For Saturn, we predict 0.2181+-0.0002, assuming a rotation period of 10:33:34 h that matches the observed polar radius.
description: 21 pages, 19 figures, 3 tables
Sharp threshold for two-dimensional majority dynamics percolation
Creators: name: Alves, Caio
name: Baldasso, Rangel
Publisher: name: arXiv
Year: 2019
Subjects: subject: Probability (math.PR)
subject: FOS: Mathematics

description: In this work we consider the two-dimensional percolation model arising from the majority dynamics process at a given time $t\in\mathbb{R}_+$. We show the emergence of a sharp threshold phenomenon for the box crossing event at the critical probability parameter $p_c(t)$ with polynomial size window. We then use this result in order to obtain stretched-exponential bounds on the one-arm event probability in the subcritical phase. Our results are based on differential inequalities derived from the OSSS inequality, inspired by the recent developments by Ahlberg, Broman, Griffiths, and Morris and by Duminil-Copin, Raoufi, and Tassion. We also provide analogous results for percolation in the voter model.
description: 24 pages, 1 figure. Version accepted for publication
TeV gamma-ray survey of the Northern sky using the ARGO-YBJ detector
Creators: name: YBJ Collaboration
name: Bartoli, B.
name: Bernardini, P.
name: Bi, X. J.
name: Bolognino, I.
name: Branchini, P.
name: Budano, A.
name: Melcarne, A. K. Calabrese
name: Camarri, P.
name: Cao, Z.
name: Cardarelli, R.
name: Catalanotti, S.
name: Chen, S. Z.
name: Chen, T. L.
name: Chen, Y.
name: Creti, P.
name: Cui, S. W.
name: Dai, B. Z.
name: DAmone, A.
name: Danzengluobu
name: De Mitri, I.
name: Piazzoli, B. DEttorre
name: Di Girolamo, T.
name: Ding, X. H.
name: Di Sciascio, G.
name: Feng, C. F.
name: Feng, Zhaoyang
name: Feng, Zhenyong
name: Gou, Q. B.
name: Guo, Y. Q.
name: He, H. H.
name: Hu, Haibing
name: Hu, Hongbo
name: Huang, Q.
name: Iacovacci, M.
name: Iuppa, R.
name: Jia, H. Y.
name: Labaciren
name: Li, H. J.
name: Li, J. Y.
name: Li, X. X.
name: Liguori, G.
name: Liu, C.
name: Liu, C. Q.
name: Liu, J.
name: Liu, M. Y.
name: Lu, H.
name: Ma, L. L.
name: Ma, X. H.
name: Mancarella, G.
name: Mari, S. M.
name: Marsella, G.
name: Martello, D.
name: Mastroianni, S.
name: Montini, P.
name: Ning, C. C.
name: Panareo, M.
name: Panico, B.
name: Perrone, L.
name: Pistilli, P.
name: Ruggieri, F.
name: Salvini, P.
name: Santonico, R.
name: Sbano, S. N.
name: Shen, P. R.
name: Sheng, X. D.
name: Shi, F.
name: Surdo, A.
name: Tan, Y. H.
name: Vallania, P.
name: Vernetto, S.
name: Vigorito, C.
name: Wang, B.
name: Wang, H.
name: Wu, C. Y.
name: Wu, H. R.
name: Xu, B.
name: Xue, L.
name: Yang, Q. Y.
name: Yang, X. C.
name: Yao, Z. G.
name: Yuan, A. F.
name: Zha, M.
name: Zhang, H. M.
name: Zhang, Jilong
name: Zhang, Jianli
name: Zhang, L.
name: Zhang, P.
name: Zhang, X. Y.
name: Zhang, Y.
name: Zhao, J.
name: Zhaxiciren
name: Zhaxisangzhu
name: Zhou, X. X.
name: Zhu, F. R.
name: Zhu, Q. Q.
name: Zizzi, G.
Publisher: name: arXiv
Year: 2013
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: The ARGO-YBJ detector is an extensive air shower array that has been used to monitor the northern $γ$-ray sky at energies above 0.3 TeV from 2007 November to 2013 January. In this paper, we present the results of a sky survey in the declination band from $-10^{\circ}$ to $70^{\circ}$, using data recorded over the past five years. With an integrated sensitivity ranging from 0.24 to $\sim$1 Crab units depending on the declination, six sources have been detected with a statistical significance greater than 5 standard deviations. Several excesses are also reported as potential $γ$-ray emitters. The features of each source are presented and discussed. Additionally, $95\%$ confidence level upper limits of the flux from the investigated sky region are shown. Specific upper limits for 663 GeV $γ$-ray AGNs inside the ARGO-YBJ field of view are reported. The effect of the absorption of $γ$-rays due to the interaction with extragalactic background light is estimated.
description: 30 pages, 13 figures, Accepted for publication by ApJ
Soluble limit and criticality of fermions in Z2 gauge theories
Creators: name: König, Elio J.
name: Coleman, Piers
name: Tsvelik, Alexei M.
Publisher: name: arXiv
Year: 2019
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: Quantum information theory and strongly correlated electron systems share a common theme of macroscopic quantum entanglement. In both topological error correction codes and theories of quantum materials (spin liquid, heavy fermion and high-$T_c$ systems) entanglement is implemented by means of an emergent gauge symmetry. Inspired by these connections, we introduce a simple model for fermions moving in the deconfined phase of a $\mathbb Z_2$ gauge theory, by coupling Kitaev's toric code to mobile fermions. This permits us to exactly solve the ground state of this system and map out its phase diagram. Reversing the sign of the plaquette term in the toric code, permits us to tune the groundstate between an orthogonal metal and an orthogonal semimetal, in which gapless quasiparticles survive despite a gap in the spectrum of original fermions. The small-to-large Fermi surface transition between these two states occurs in a stepwise fashion with multiple intermediate phases. By using a novel diagrammatic technique we are able to explore physics beyond the integrable point, to examine various instabilities of the deconfined phase and to derive the critical theory at the transition between deconfined and confined phases. We outline how the fermionic toric code can be implemented as a quantum circuit thus providing an important link between quantum materials and quantum information theory.
description: 6 pages with 6 figures + Appendix. Main update since v1: Proposal for a quantum emulator for fermions in $\mathbb Z_2$ gauge theories. Main update since v2: Extended discussion of orthogonal semimetal-metal transition. v2 is accepted for publication in Phys.Rev.B
Definable MAD families and forcing axioms
Creators: name: Fischer, Vera
name: Schrittesser, David
name: Weinert, Thilo
Publisher: name: arXiv
Year: 2019
Subjects: subject: Logic (math.LO)
subject: FOS: Mathematics
subject: 03E15, 03E57, 03E55

description: We show that under the Bounded Proper Forcing Axiom and an anti-large cardinal assumption, there is a $\mathbfΠ^1_2$ MAD family.
description: 13 pages
British Journal for Military History, Vol 6 No 3 (2020)
Creators: name: British Journal For Military History
Publisher: name: British Journal for Military History
Year: 2020

description: Editorial...1 Who Speaks for France? Vichy, Free France and the Battle over French Legitimacy: 1940-1942...2-22 ‘Everybody to be armed’: Italian naval personnel and the Axis occupation of Bordeaux, 1940–1943...23-41 A ‘Lack of Moral Fibre’ in Royal Air Force Bomber Command and Popular Culture...42-65 Anne-Marie Walters vs. George Starr: Reflections on Gendered Representations within the Special Operations Executive...66-84 The Forgotten Chindits – 23 British Infantry Brigade...85-127 The Politics of Commemoration: Britain and D-Day, 1984-1994...128-140 Between Propaganda and Facticity: News Reporting of Non-White Service in the World Wars...141-147 British Newsreels at War, 1939-45: A Significant Source for Scholars...148-154 The Second World War Archives of the Institut Français du Royaume Uni, London...155-162 NARA Escape and Evasion Reports...163-167 A Separate Peace? Reconsidering Post-conflict Military Occupations...168-177 Matthew Woodcock & Cian O’Mahony, Early Modern Military Identities 1560-1639: Reality and Representation...178-180 Quintin Colville & James Davey (eds.), A New Naval History...180-181 Michael Brown, Anna Maria Barry and Joanne Begiato, (eds.), Martial Masculinities: Experiencing and imagining the military in the long nineteenth century...182-184 Peter Duffell, Gurkha Odyssey: Campaigning for the Crown...184-185 Niamh Gallagher, Ireland and the Great War: A Social and Political History...186-187 Don Farr, A Battle Too Far; Arras 1917...187-188 David Swift and Oliver Wilkinson (eds.), Veterans of the First World War: Ex-Servicemen and Ex-Servicewomen in Post-war Britain and Ireland...189-190 Robert Forczyk, Case White: the Invasion of Poland, 1939 / Roger Moorhouse, First to Fight: the Polish War, 1939...190-193 Helen Fry, The Walls Have Ears: the Greatest Intelligence Operation of World War II...193-195 Greg Baughen, RAF on the Offensive: The Rebirth of Tactical Air Power 1940-1941...195-197 Ian Mitchell, The Battle of The Peaks and Long Stop Hill: Tunisia, April-May 1943...197-199