cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
FIR-luminous [CII] emitters in the ALMA-SCUBA-2 COSMOS survey (AS2COSMOS): The nature of submillimeter galaxies in a 10 comoving Mpc-scale structure at z~4.6
Creators: name: Mitsuhashi, Ikki
name: Matsuda, Yuichi
name: Smail, Ian
name: Hayatsu, Natsuki
name: Simpson, James
name: Swinbank, Mark
name: Umahata, Hideki
name: Dudzevičiūtė, Ugne
name: Birkin, Jack
name: Ikarashi, Soh
name: Chen, Chian-Chou
name: Tadaki, Ken-ichi
name: Yajima, Hidenobu
name: Harikane, Yuichi
name: Inami, Hanae
name: Chapman, Scott
name: Hatsukade, Bunyo
name: Iono, Daisuke
name: Bunker, Andrew
name: Ao, Yiping
name: Saito, Tomoki
name: Ueda, Junko
name: Sakamoto, Seiichi
Publisher: name: arXiv
Year: 2020
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We report the discovery of a 10 comoving Mpc-scale structure traced by massive submillimeter galaxies (SMGs) at z~4.6. These galaxies are selected from an emission line search of ALMA Band 7 observations targeting 184 luminous submillimeter sources ($S_{850μ{\rm m}}\geq$ 6.2 mJy) across 1.6 degrees$^2$ in the COSMOS field. We identify four [CII] emitting SMGs and two probable [CII] emitting SMG candidates at z=4.60-4.64 with velocity-integrated signal-to-noise ratio of SNR>8. Four of the six emitters are near-infrared blank SMGs. After excluding one SMG whose emission line is falling at the edge of the spectral window, all galaxies show clear velocity gradients along the major axes that are consistent with rotating gas disks. The estimated rotation velocities of the disks are 330-550 km s$^{-1}$ and the inferred host dark-matter halo masses are ~2-8 $\times$ 10$^{12}$M$_{\odot}$. From their estimated halo masses and [CII] luminosity function, we suggest that these galaxies have a high (50-100%) duty cycle and high (~0.1) baryon conversion efficiency (SFR relative to baryon accretion rate), and that they contribute $\simeq$2% to the total star-formation rate density at z=4.6. These SMGs are concentrated within just 0.3% of the full survey volume, suggesting they are strongly clustered. The extent of this structure and the individual halo masses suggest that these SMGs will likely evolve into members of a ~10$^{15}$M$_{\odot}$ cluster at z=0. This survey reveals synchronized dusty starburst in massive halos at z>4, which could be driven by mergers or fed by smooth gas accretion.
Numerical simulations and infrared camera measurements of temperature distributions in laser powder bed fusion of polymers
Creators: name: Bierwisch, Claas
name: Mohseni-Mofidi, Seyyid Shoya
name: Dietemann, Bastien
name: Grünewald, Moritz
name: Rudloff, Johannes
name: Lang, Marieluise
Publisher: name: Fraunhofer-Gesellschaft
Year: 2020
Subjects: subject: smoothed particle hydrodynamics
subject: melt pool
subject: additive manufacturing
subject: DDC::500 Naturwissenschaften und Mathematik::530 Physik::536 Wärme
subject: DDC::600 Technik, Medizin, angewandte Wissenschaften::620 Ingenieurwissenschaften::620 Ingenieurwissenschaften und zugeordnete Tätigkeiten
subject: DDC::600 Technik, Medizin, angewandte Wissenschaften::620 Ingenieurwissenschaften::621 Angewandte Physik

description: Smoothed particle hydrodynamics simulations in two dimensions are used to calculate the transient melt pool temperature distribution in the laser powder bed fusion process of polymers. The effects of laser power, scan speed, hatch distance, absorptance, emissivity, density, heat capacity, heat transfer, latent heat, thermal conductivity, melting and re-solidification, viscosity and surface tension are considered in the model. A wide range of these laser parameters and material properties is investigated. Complementary to the simulation results, infrared camera measurements of the transient surface temperature are provided.
An exact relation between free energy fluctuations and bond chaos in the Sherrington-Kirkpatrick model
Creators: name: Aspelmeier, T.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: FOS: Physical sciences

description: Using a variant of the interpolating Hamiltonian technique, we show that there exists, in the Sherrington-Kirkpatrick spin glass, an exact connection between the sample-to-sample fluctuations of the free energy and bond chaos involving 2- and 4-replica overlaps between replicas with different but correlated bonds. This relation is used to derive an upper bound of the fluctuations.
description: 13 pages, no figures
A multiwavelength map of the nuclear region of NGC7582
Creators: name: Bianchi, Stefano
name: Chiaberge, Marco
name: Piconcelli, Enrico
name: Guainazzi, Matteo
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We performed a detailed analysis of the Chandra and HST images of the Seyfert 2 galaxy, NGC7582. The dust lane, as mapped by the HST NIR and optical images, strongly influences the morphology of the soft X-ray emission, being spatially coincident with excess of X-ray absorption. Two 'hot spots', i.e. regions where emission from higher ionization stages of O and Ne is stronger, are observed in the soft X-ray image. They can be tracers of variations of the ionization parameter, even if, at least for one of them, absorption may be the dominant effect. The positions of the `hot spots' suggest that they are not affected by the star-formation regions observed with HST, being located far away from them. Therefore, the starburst does not seem to play an important role in the photoionization of the soft X-ray emitting gas. The resulting picture is consistent with modified unification scenarios, where the Compton-thick torus coexists with a large-scale Compton-thin material associated with the dust lane and circumnuclear gas is photoionized by the AGN along torus-free lines of sight.
description: 6 pages, 6 figures, accepted for publication in MNRAS
Simultaneous blockade of a photon phonon, and magnon induced by a two-level atom
Creators: name: Zhao, Chengsong
name: Li, Xun
name: Chao, Shilei
name: Peng, Rui
name: Li, Chong
name: Zhou, Ling
Publisher: name: arXiv
Year: 2020
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: The hybrid microwave optomechanical-magnetic system has recently emerged as a promising candidate for coherent information processing because of the ultrastrong microwave photon-magnon coupling and the longlife of the magnon and phonon. As a quantum information processing device, the realization of a single excitation holds special meaning for the hybrid system. In this paper, we introduce a single two-level atom into the optomechanical-magnetic system and show that an unconventional blockade due to destructive interference cannot offer a blockade of both the photon and magnon. Meanwhile, under the condition of single excitation resonance, the blockade of the photon, phonon, and magnon can be achieved simultaneously even in a weak optomechanical region, but the phonon blockade still requires the cryogenic temperature condition.
description: 10 pages, 7 figures
Experimental tests on the lifetime Asymmetry
Creators: name: Shi, Zhi-Qiang
name: Ni, Guang-Jiong
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: The experimental test problem of the left-right polarization-dependent lifetime asymmetry is discussed. It shows that the existing experiments cannot demonstrate the lifetime asymmetry to be right or wrong after analyzing the measurements on the neutron, the muon and the tau lifetime, as well as the $g-2$ experiment. However, It is pointed out emphatically that the SLD and the E158 experiments, the measurements of the left-right integrated cross section asymmetry in $Z$ boson production by $e^+e^-$ collisions and by electron-electron Møller scattering, can indirectly demonstrate the lifetime asymmetry. In order to directly demonstrate the lifetime asymmetry, we propose some possible experiments on the decays of polarized muons. The precise measurement of the lifetime asymmetry could have important significance for building a muon collider, also in cosmology and astrophysics. It would provide a sensitive test of the standard model in particle physics and allow for exploration of the possible $V+A$ interactions.
description: 11 pages, 1 figure
DATS 6401-10: Individual Project - Analysis of Military, Healthcare and Educational Expenditure in 10 Ten Nations
Creators: name: Lee, Benjamin
name: Zahadat, Nima
Publisher: name: Zenodo
Year: 2021

description: This purpose of this project is to compare the military, healthcare and educational expenditure of at least the top ten nations in the world and gain experience in building an effective and presentable website containing useful visualizations. The countries used in this project are the nineteen current members of the G-20. The military data in this project was sourced from the SIPRI website, while the healthcare, educational, and GDP/population data was sourced from the World Bank. Excel files were downloaded from the aforementioned sources, and data for 2013 - 2017 was pulled into a Google Spreadsheet. All cleaning and pre-processing on the data, including scaling in terms of millions USD ($), was done in Google Spreadsheets; a copy of the Spreadsheet file has been included in this submission as "individual_project_data_bml72.xlsx". Comparisons were made on GDP by country, expenditure by country, expenditure vs GDP, expenditure to different expenditure types (i.e. military vs healthcare by country), per capita-adjusted comparisons of all the aforementioned, and comparisons of the fastest growing countries in fixed value and percentage. The results conclude that the US possesses the largest GDP of all countries considered, as well as the highest spending in military, healthcare and education. On a per capita level, however, Saudi Arabia beats the US in military expenditure. In terms of fixed value, the US leads the group as the fastest growing country in healthcare. In percentage, however, the leader is actually Saudi Arabia! In the case of education, barring missing data the leaders in fixed value were France and South Africa, while the leaders in percentage were Argentina and South Africa.
Long range correlation in cosmic microwave background radiation
Creators: name: Movahed, M. Sadegh
name: Ghasemi, F.
name: Rahvar, Sohrab
name: Tabar, M. Reza Rahimi
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: Data Analysis, Statistics and Probability (physics.data-an)
subject: FOS: Physical sciences

description: We investigate the statistical anisotropy and Gaussianity of temperature fluctuations of Cosmic Microwave Background radiation (CMB) data from {\it Wilkinson Microwave Anisotropy Probe} survey, using the multifractal detrended fluctuation analysis, rescaled range and scaled windowed variance methods. The multifractal detrended fluctuation analysis shows that CMB fluctuations has a long range correlation function with a multifractal behavior. By comparing the shuffled and surrogate series of CMB data, we conclude that the multifractality nature of temperature fluctuation of CMB is mainly due to the long-range correlations and the map is consistent with a Gaussian distribution.
description: 10 pages, 7 figures, V2: Added comments, references and major corrections
The influence of selection effects on the observed cataclysmic variable population: modelling and application to the Palomar-Green sample
Creators: name: Pretorius, Magaretha L.
name: Knigge, Christian
name: Kolb, Ulrich
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Large differences between the properties of the known sample of cataclysmic variable stars (CVs) and the predictions of the theory of binary star evolution have long been recognised. However, because all existing CV samples suffer from strong selection effects, observational biases must be taken into account before it is possible to tell whether there is an inconsistency. In order to address this problem, we have modelled the impact of selection effects on observed CV samples using a Monte Carlo approach. By simulating the selection criteria of the Palomar-Green (PG) Survey, we show that selection effects cannot reconcile the predictions of standard CV evolution theory with the observed sample. More generally, we illustrate the effect of the biases that are introduced by magnitude limits, selection cuts in U-B, and restrictions in galactic latitude.
description: 12 pages, 11 figures, minor changes made to the text, accepted for publication in MNRAS
Droplet impact onto a spring-supported plate: analysis and simulations
Creators: name: Negus, Michael J.
name: Moore, Matthew R.
name: Oliver, James M.
name: Cimpeanu, Radu
Publisher: name: arXiv
Year: 2020
Subjects: subject: Fluid Dynamics (physics.flu-dyn)
subject: Analysis of PDEs (math.AP)
subject: FOS: Physical sciences
subject: FOS: Mathematics

description: The high-speed impact of a droplet onto a flexible substrate is a highly nonlinear process of practical importance which poses formidable modelling challenges in the context of fluid-structure interaction. We present two approaches aimed at investigating the canonical system of a droplet impacting onto a rigid plate supported by a spring and a dashpot: matched asymptotic expansions and direct numerical simulation (DNS). In the former, we derive a generalisation of inviscid Wagner theory to approximate the flow behaviour during the early stages of the impact. In the latter, we perform detailed DNS designed to validate the analytical framework, as well as provide insight into later times beyond the reach of the proposed mathematical model. Drawing from both methods, we observe the strong influence that the mass of the plate, resistance of the dashpot and stiffness of the spring have on the motion of the solid, which undergoes forced damped oscillations. Furthermore, we examine how the plate motion affects the dynamics of the droplet, predominantly through altering its internal hydrodynamic pressure distribution. We build on the interplay between these techniques, demonstrating that a hybrid approach leads to improved model and computational development, as well as result interpretation, across multiple length- and time-scales.
description: 28 pages, 6 figures
SISO APP Searches in Lattices with Tanner Graphs
Creators: name: Ionescu, Dumitru Mihai
name: Zhu, Haidong
Publisher: name: arXiv
Year: 2006
Subjects: subject: Information Theory (cs.IT)
subject: Data Structures and Algorithms (cs.DS)
subject: FOS: Computer and information sciences
subject: E.4; H.1.1

description: An efficient, low-complexity, soft-output detector for general lattices is presented, based on their Tanner graph (TG) representations. Closest-point searches in lattices can be performed as non-binary belief propagation on associated TGs; soft-information output is naturally generated in the process; the algorithm requires no backtrack (cf. classic sphere decoding), and extracts extrinsic information. A lattice's coding gain enables equivalence relations between lattice points, which can be thereby partitioned in cosets. Total and extrinsic a posteriori probabilities at the detector's output further enable the use of soft detection information in iterative schemes. The algorithm is illustrated via two scenarios that transmit a 32-point, uncoded super-orthogonal (SO) constellation for multiple-input multiple-output (MIMO) channels, carved from an 8-dimensional non-orthogonal lattice (a direct sum of two 4-dimensional checkerboard lattice): it achieves maximum likelihood performance in quasistatic fading; and, performs close to interference-free transmission, and identically to list sphere decoding, in independent fading with coordinate interleaving and iterative equalization and detection. Latter scenario outperforms former despite the absence of forward error correction coding---because the inherent lattice coding gain allows for the refining of extrinsic information. The lattice constellation is the same as the one employed in the SO space-time trellis codes first introduced for 2-by-2 MIMO by Ionescu et al., then independently by Jafarkhani and Seshadri. Complexity is log-linear in lattice dimensionality, vs. cubic in sphere decoders.
description: 15 pages, 6 figures, 2 tables, uses IEEEtran.cls
Exact non-Hermitian mobility edges in one-dimensional quasicrystal lattice with exponentially decaying hopping and its dual lattice
Creators: name: Liu, Yanxia
name: Wang, Yongjian
name: Zheng, Zuohuan
name: Chen, Shu
Publisher: name: arXiv
Year: 2020
Subjects: subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: FOS: Physical sciences

description: We analytically determine the non-Hermitian mobility edges of a one-dimensional quasiperiodic lattice model with exponential decaying hopping and complex potentials as well as its dual model, which is just a non-Hermitian generalization of the Ganeshan-Pixley-Das Sarma model with nonreciprocal nearest-neighboring hopping. The presence of non-Hermitian term destroys the self-duality symmetry and thus prevents us exploring the localization-delocalization point through looking for self-dual points. Nevertheless, by applying Avila's global theory, the Lyapunov exponent of the Ganeshan-Pixley-Das Sarma model can be exactly derived, which enables us to get an analytical expression of mobility edge of the non-Hermitian dual model. Consequently, the mobility edge of the original model is obtained by using the dual transformation, which creates exact mappings between the spectra and wavefunctions of these two models.
description: 9 pages, 3 figures
From Solar-like to Mira stars: a unifying description of stellar pulsators in the presence of stochastic noise
Creators: name: Cunha, Margarida S.
name: Avelino, Pedro P.
name: Chaplin, William J.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We discuss and characterise the power spectral density properties of a model aimed at describing pulsations in stars from the main-sequence to the asymptotic giant branch. We show that the predicted limit of the power spectral density for a pulsation mode in the presence of stochastic noise is always well approximated by a Lorentzian function. While in stars predominantly stochastically driven the width of the Lorentzian is defined by the mode lifetime, in stars where the driving is predominately coherent the width is defined by the amplitude of the stochastic perturbations. In stars where both drivings are comparable, the width is defined by both these parameters and is smaller than that expected from pure stochastic driving. We illustrate our model through numerical simulations and propose a well defined classification of stars into predominantly stochastic (solar-like) and predominately coherent (classic) pulsators. We apply the model to the study of the Mira variable U Per, and the semiregular variable L2 Pup and, following our classification, conclude that they are both classical pulsators. Our model provides a natural explanation for the change in behaviour of the pulsation amplitude-period relation noted in several earlier works. Moreover, our study of L2 Pup enables us to test the scaling relation between the mode line width and effective temperature, confirming that an exponential scaling reproduces well the data all the way from the main sequence to the asymptotic giant branch, down to temperatures about 1000 K below what has been tested in previous studies.
description: 11 pages, 8 figures, accepted for publication in MNRAS
Wasserstein K-Means for Clustering Tomographic Projections
Creators: name: Rao, Rohan
name: Moscovich, Amit
name: Singer, Amit
Publisher: name: arXiv
Year: 2020
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
subject: I.5.3; I.4.0
subject: 62H30 (Primary) 92C55, 68U10 (Secondary)

description: Motivated by the 2D class averaging problem in single-particle cryo-electron microscopy (cryo-EM), we present a k-means algorithm based on a rotationally-invariant Wasserstein metric for images. Unlike existing methods that are based on Euclidean ($L_2$) distances, we prove that the Wasserstein metric better accommodates for the out-of-plane angular differences between different particle views. We demonstrate on a synthetic dataset that our method gives superior results compared to an $L_2$ baseline. Furthermore, there is little computational overhead, thanks to the use of a fast linear-time approximation to the Wasserstein-1 metric, also known as the Earthmover's distance.
description: 11 pages, 5 figures, 1 table
rf measurements and tuning of the 1-meter-long 750 MHz radio-frequency quadrupole for artwork analysis
Creators: name: Pommerenke, Hermann W.
name: van Rienen, Ursula
name: Grudiev, Alexej
Publisher: name: arXiv
Year: 2020
Subjects: subject: Accelerator Physics (physics.acc-ph)
subject: FOS: Physical sciences

description: The 750 MHz PIXE-RFQ (radio-frequency quadrupole), developed and built at CERN, provides 2 MeV protons over a length of one meter for proton-induced X-ray emission analysis (PIXE) of cultural heritage artwork. In this paper, we report low-power rf measurements and tuning of the PIXE-RFQ, which have been completed mid-2020. Using a novel algorithm based on direct measurements of the response matrix, field and frequency could tuned at the same time in only two steps to satisfying accuracy. Additionally, we report measurements of single modules, quality factors, and coupling strength. In all cases, very good agreement between rf measurement and design values was observed.
description: 13 pages, 15 figures. Submitted to Physical Review Accelerators and Beams
Gruppe von Farfa Sabina, Gemeinschaft der Kirchen und Petrusamt
Creators: name: Rahner, Johanna
Publisher: name: Ökumenische Rundschau
Year: 2025

description: Ökumenische Rundschau, Bd. 60 Nr. 4 (2011): Ökumenische Rundschau, Band 60, Heft 4
Protogynous hermaphroditism in a temperate reef fish, the blackeye goby, Coryphopterus nicholsii (Pisces: Gobiidae)
Creators: name: Kroon, Frederieke Janet
Publisher: name: University of British Columbia
Year: 2009

description: In this thesis, I examine the occurrence of protogynous hermaphroditism in the blackeye goby, Coryphopterus nicholsii (Pisces, Gobiidae) at Bamfield, Vancouver Island, Canada. The female biased sex ratios, size distributions of female and male C. nicholsii, and histological data all confirm that the species is protogynous. Histological data strongly suggest two patterns of sexual ontogeny, with males resulting from either pre- or post-maturational sex change. Sex change is not common during, and immediately after the breeding season. The social organization of C. nicholsii is based upon the year-round defense of a territory, primarily by large individuals of both sexes. A territory always includes one or more shelter rocks. These are used as refuges by both sexes, and as nest sites by males during the breeding season. The defence of a shelter rock is important in reproduction, in the reduction of predation, and the avoidance of adverse environmental conditions. Suitable refuge and nest site rocks are a limited resource and intraspecific competition determines which individuals gain access to them. Since the outcome of competition for suitable shelter rocks is strongly size-specific, large males monopolize spawnings. Large males receive a disproportionate share of the matings: males smaller than 7.0 cm were never seen nesting in the field. Yet, approximately 30% of males are smaller than 7.0 cm, indicating that many females change sex at smaller sizes. This early sex change confers a growth advantage: small, non-nesting males grow faster than similarly-sized mature females. As a result, small males may obtain nesting male status more rapidly than females that change sex later in life. The presence of early sex changers may also be related to an alternative mating tactic, sneak spawning. Sex change is correlated with a reduction in whole-body concentration of 17(3-estradiol, and an increase in 11-ketotestosterone concentration. Both steroids occur naturally in female and male gobies. Administration of 11- ketotestosterone, its precursor 11-ketoadrenosterone, and an aromatase inhibitor (Fadrazole) resulted in complete sex change in mature females. These results strongly suggest that both 17B-estradiol and 11- ketotestosterone are involved in mediating sex change in this goby. These results are discussed with regards to the geographical disparity of protogynous hermaphroditism in teleosts. Protogyny occurs much more frequently on tropical coral reefs than on temperate rocky reefs. I propose that a difference in the occurrence of certain mating systems in tropical and temperate waters partly explains this disparity.
Relativistic Radiation Magnetohydrodynamics in Dynamical Spacetimes: Numerical Methods and Tests
Creators: name: Farris, Brian D.
name: Li, Tsz Ka
name: Liu, Yuk Tung
name: Shapiro, Stuart L.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: Many systems of current interest in relativistic astrophysics require a knowledge of radiative transfer in a magnetized gas flowing in a strongly-curved, dynamical spacetime. Such systems include coalescing compact binaries containing neutron stars or white dwarfs, disks around merging black holes, core collapse supernovae, collapsars, and gamma-ray burst sources. To model these phenomena, all of which involve general relativity, radiation (photon and/or neutrino), and magnetohydrodynamics, we have developed a general relativistic code capable of evolving MHD fluids and radiation in dynamical spacetimes. Our code solves the coupled Einstein-Maxwell-MHD-Radiation system of equations both in axisymmetry and in full 3+1 dimensions. We evolve the metric by integrating the BSSN equations, and use a conservative, high-resolution shock-capturing scheme to evolve both the MHD and radiation moment equations. In this paper, we implement our scheme for optically thick gases and grey-body opacities. Our code gives accurate results in a suite of tests involving radiating shocks and nonlinear waves propagating in Minkowski spacetime. In addition, to test our code's ability to evolve the relativistic radiation-MHD equations in strong-field dynamical spacetimes, we study "thermal Oppenheimer-Snyder collapse" to a black hole, and find good agreement between analytic and numerical solutions.
description: 20 pages, 8 figures, submitted to PRD
Some Aspects of Virtual Black Holes
Creators: name: Faizal, Mir
Publisher: name: arXiv
Year: 2006
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: In this paper we shall consistently third quantize modified gravity. Then we shall analyse certain aspects of virtual black holes in this third quantized modified gravity. We will see how a statistical mechanical origin for the Bekenstein-Hawking entropy naturally arises in this model. Furthermore, in this model the area and thus the entropy of a real macroscopic black hole is quantized. Virtual black holes cause loss of quantum coherence and this gives an intrinsic entropy to all physical systems which can be used to define a direction of time and hence provide a solution to the problem of time.
description: 11 pages, 0 figures, accepted for publication in JETP
Direct and absolute temperature mapping and heat transfer measurements in diode-end-pumped Yb:YAG
Creators: name: Chenais, Sebastien
name: Forget, Sebastien
name: Druon, Frederic
name: Balembois, Francois
name: Georges, Patrick
Publisher: name: arXiv
Year: 2006
Subjects: subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: We report direct and absolute temperature measurements in a diode-end-pumped Yb:YAG crystal, using a calibrated infrared camera, with a 60-$μ$m spatial resolution. The heat transfer coefficient has been measured, for the first time to our knowledge, with four different types of thermal contact (H = 0.25, 0.28, 0.9 and 2.0 for bare contact, graphite layer, indium foil and heat sink grease respectively). The dynamics of thermal effects is also presented.
title: Écrans. 2015-1, n° 3
title: Expanded Cinéma
titleType: Subtitle
Creators: name: (:Unap)
Publisher: name: Classiques Garnier
Year: 2015
Subjects: subject: Cinéma
subject: Art contemporain
subject: Média
subject: Émotion
subject: Technologie
subject: Image
subject: Moderne

description: Contributeurs : Emmanuelle André, Martin Barnier, Aline Caillet, Enrico Camporesi, Mauro Carbone, Anna Caterina Dalmasso, Isabelle Davy, Marie-Laure Delaporte, Frédérique Devaux, Erick Felinto, Lawrence Gasquet, Antoine Gaudin, Raphaël Jaudon, Olha Kobryn, Benjamin Labé, Dario Marchiori, Cécile Martin, Carola Moujan, Ronald Shusterman, Clotilde Simond, Élène Tremblay et Luc Vanchéri.
Antiferromagnetic Order of Strongly Interacting Fermions in a Trap: Real-Space Dynamical Mean-Field Analysis
Creators: name: Snoek, M.
name: Titvinidze, I.
name: Toke, C.
name: Byczuk, K.
name: Hofstetter, W.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We apply Dynamical Mean-Field Theory to strongly interacting fermions in an inhomogeneous environment. With the help of this Real-Space Dynamical Mean-Field Theory (R-DMFT) we investigate antiferromagnetic states of repulsively interacting fermions with spin 1/2 in a harmonic potential. Within R-DMFT, antiferromagnetic order is found to be stable in spatial regions with total particle density close to one, but persists also in parts of the system where the local density significantly deviates from half filling. In systems with spin imbalance, we find that antiferromagnetism is gradually suppressed and phase separation emerges beyond a critical value of the spin imbalance.
description: 4 pages 5 figures, published version
Long-time asymptotics for an integrable evolution equation with a $3 \times 3$ Lax pair
Creators: name: Charlier, Christophe
name: Lenells, Jonatan
Publisher: name: arXiv
Year: 2021
Subjects: subject: Analysis of PDEs (math.AP)
subject: Exactly Solvable and Integrable Systems (nlin.SI)
subject: FOS: Mathematics
subject: FOS: Physical sciences

description: We derive a Riemann--Hilbert representation for the solution of an integrable nonlinear evolution equation with a $3 \times 3$ Lax pair. We use the derived representation to obtain formulas for the long-time asymptotics.
description: 21 pages, 2 figures. arXiv admin note: text overlap with arXiv:2003.02777
Passively mode-locked diode-pumped Nd:YVO4 oscillator operating at ultra-low repetition rate
Creators: name: Papadopoulos, Dimitris N.
name: Forget, Sebastien
name: Delaigue, M.
name: Druon, Frederic
name: Balembois, Francois
name: Georges, Patrick
Publisher: name: arXiv
Year: 2006
Subjects: subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: We demonstrate the operation of an ultra low repetition rate, high peak power, picosecond diode pumped Nd:YVO4 passively mode locked laser oscillator. Repetition rates even below 1 MHz were achieved with the use of a new design multiple-pass cavity and a semiconductor saturable absorber. Long term stable operation at 1.2 MHz, pulse duration of 16.3 ps and average output power of 470 mW corresponding to 24 KW peak power pulses is reported. This is, to our knowledge, the lowest repetition rate high peak power pulses ever generated directly from a picosecond laser resonator without cavity dumping.
ИННОВАЦИОННЫЕ ТЕХНОЛОГИИ В ПЕДАГОГИКЕ
Creators: name: Нурмаматова, Севара
name: Курбанова, Дильбар
Publisher: name: Zenodo
Year: 2024

description: За последние годы в нашей стране проведена большая работа, особенно в сфере образовательного процесса. В результате этого во всех учебных заведениях, профессиональных училищах, общеобразовательных и среднеспециальных учебных заведениях, вузах внедрены современные методы обучения, инновационные педагогические технологии и т.д. Наше государство создает массу условий для нашей молодежи, независимо от ее сферы деятельности.
On the origin of the Korteweg-de Vries equation
Creators: name: de Jager, E. M.
Publisher: name: arXiv
Year: 2006
Subjects: subject: History and Overview (math.HO)
subject: Analysis of PDEs (math.AP)
subject: FOS: Mathematics
subject: 01-02, 01A55 (Primary) 76-03, 76B25, 35Q53 (Secondary)

description: The Korteweg-de Vries equation has a central place in a model for waves on shallow water and it is an example of the propagation of weakly dispersive and weakly nonlinear waves. Its history spans a period of about sixty years, starting with experiments of Scott Russell in 1834, followed by theoretical investigations of, among others, Lord Rayleigh and Boussinesq in 1871 and, finally, Korteweg and De Vries in 1895. In this essay we compare the work of Boussinesq and Korteweg-de Vries, stressing essential differences and some interesting connections. Although there exist a number of articles, reviewing the origin and birth of the Korteweg-de Vries equations, connections and differences, not generally known, are reported.
description: minor corrections; 25 pages, 3 figures
Searching for intergalactic star forming regions in Stephan's Quintet with SITELLE: II. Physical properties and metallicity
Creators: name: Puertas, S. Duarte
name: Vilchez, J. M.
name: Iglesias-Páramo, J.
name: Drissen, L.
name: Kehrig, C.
name: Martin, T.
name: Pérez-Montero, E.
name: Arroyo-Polonio, A.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: Based on SITELLE spectroscopy, we studied the ionised gas emission for the 175 H$α$ emission regions in the Stephan's Quintet (SQ). A detailed analysis is performed of the star formation rate (SFR), oxygen abundance (O/H), and nitrogen-to-oxygen abundance ratio (N/O) of the SQ regions, to explore the provenance and evolution of this complex structure. According to the BPT diagram, we found 91 HII, 17 composite, and 7 active galactic nucleus-like regions in SQ. Several regions are compatible with fast shocks models without a precursor for solar metallicity and low density (n=0.1 cm$^{-3}$), with velocities between 175 - 300 km s$^{-1}$. We derived the total SFR in SQ (log(SFR/M$_\odot\,yr^{-1}$=0.496); starburst A and B provide 28% and 9% of the total SFR, and 45% comes from the regions with a radial velocity lower than 6160 km s$^{-1}$. For this reason, we assume that the material prior to the collision with the new intruder (NI) does not show a high SFR, and therefore SQ was apparently quenched. When considering the integrated SFR for the whole SQ and the NI, we found that both zones have a SFR consistent with those obtained in the SDSS star-forming galaxies. At least two chemically different gas components cohabit in SQ where, on average, the regions with high radial velocities (v$>$6160 km s$^{-1}$) have lower values of O/H and N/O than those with low radial velocities (v$\leq$6160 km s$^{-1}$). The values found for the line ratios, O/H, and N/O for the southern debris region and the northernmost tidal tail, are compatible with regions belonging to the outer part of the galaxies. We highlight the presence of inner-outer variation for O/H and some emission line ratios along the NI strands and the young tidal tail south strand. Finally, the SQ H$α$ regions are outside the galaxies because the interactions have dispersed the gas to the peripheral zones.
description: Accepted for publication in A&A, 30 pages, 17 figures, and 3 tables
Automatic detection of abnormal EEG signals using wavelet feature extraction and gradient boosting decision tree
Creators: name: Albaqami, Hezam
name: Hassan, Ghulam Mubashar
name: Subasi, Abdulhamit
name: Datta, Amitava
Publisher: name: arXiv
Year: 2020
Subjects: subject: Signal Processing (eess.SP)
subject: Artificial Intelligence (cs.AI)
subject: Machine Learning (cs.LG)
subject: FOS: Electrical engineering, electronic engineering, information engineering
subject: FOS: Computer and information sciences

description: Electroencephalography is frequently used for diagnostic evaluation of various brain-related disorders due to its excellent resolution, non-invasive nature and low cost. However, manual analysis of EEG signals could be strenuous and a time-consuming process for experts. It requires long training time for physicians to develop expertise in it and additionally experts have low inter-rater agreement (IRA) among themselves. Therefore, many Computer Aided Diagnostic (CAD) based studies have considered the automation of interpreting EEG signals to alleviate the workload and support the final diagnosis. In this paper, we present an automatic binary classification framework for brain signals in multichannel EEG recordings. We propose to use Wavelet Packet Decomposition (WPD) techniques to decompose the EEG signals into frequency sub-bands and extract a set of statistical features from each of the selected coefficients. Moreover, we propose a novel method to reduce the dimension of the feature space without compromising the quality of the extracted features. The extracted features are classified using different Gradient Boosting Decision Tree (GBDT) based classification frameworks, which are CatBoost, XGBoost and LightGBM. We used Temple University Hospital EEG Abnormal Corpus V2.0.0 to test our proposed technique. We found that CatBoost classifier achieves the binary classification accuracy of 87.68%, and outperforms state-of-the-art techniques on the same dataset by more than 1% in accuracy and more than 3% in sensitivity. The obtained results in this research provide important insights into the usefulness of WPD feature extraction and GBDT classifiers for EEG classification.
Fuscheria terricola Berger, Foissner & Adam 1983
Creators: name: Durán-Ramírez, Carlos Alberto
name: Dias, Roberto Júnio Pedroso
name: Estrada, Rosaura Mayén-
Publisher: name: Zenodo
Year: 2020
Subjects: Biodiversity
Taxonomy
Chromista
Ciliophora
Gymnostomatea
Haptorida
Fuscheriidae
Fuscheria
Fuscheria terricola

description: Fuscheria terricola 2 Berger, Foissner & Adam, 1983
Distribution. BRAZIL: Rio de Janeiro (Dunthorn et al. 2012).
description: Published as part of Durán-Ramírez, Carlos Alberto, Dias, Roberto Júnio Pedroso & Estrada, Rosaura Mayén-, 2020, Checklist of ciliates (Alveolata: Ciliophora) that inhabit in bromeliads from the Neotropical Region, pp. 1-36 in Zootaxa 4895 (1) on page 14, DOI: 10.11646/zootaxa.4895.1.1, http://zenodo.org/record/4321437
Searching for Possible Exoplanet Transits from BRITE Data through a Machine Learning Technique
Creators: name: Yeh, Li-Chin
name: Jiang, Ing-Guey
Publisher: name: arXiv
Year: 2020
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: Machine Learning (cs.LG)
subject: FOS: Physical sciences
subject: FOS: Computer and information sciences

description: The photometric light curves of BRITE satellites were examined through a machine learning technique to investigate whether there are possible exoplanets moving around nearby bright stars. Focusing on different transit periods, several convolutional neural networks were constructed to search for transit candidates. The convolutional neural networks were trained with synthetic transit signals combined with BRITE light curves until the accuracy rate was higher than 99.7 $\%$. Our method could efficiently lead to a small number of possible transit candidates. Among these ten candidates, two of them, HD37465, and HD186882 systems, were followed up through future observations with a higher priority. The codes of convolutional neural networks employed in this study are publicly available at http://www.phys.nthu.edu.tw/$\sim$jiang/BRITE2020YehJiangCNN.tar.gz.
description: 23 pages, 4 tables, 8 figures, published by PASP
Iterative Greedy Matching for 3D Human Pose Tracking from Multiple Views
Creators: name: Tanke, Julian
name: Gall, Juergen
Publisher: name: arXiv
Year: 2021
Subjects: subject: Computer Vision and Pattern Recognition (cs.CV)
subject: FOS: Computer and information sciences

description: In this work we propose an approach for estimating 3D human poses of multiple people from a set of calibrated cameras. Estimating 3D human poses from multiple views has several compelling properties: human poses are estimated within a global coordinate space and multiple cameras provide an extended field of view which helps in resolving ambiguities, occlusions and motion blur. Our approach builds upon a real-time 2D multi-person pose estimation system and greedily solves the association problem between multiple views. We utilize bipartite matching to track multiple people over multiple frames. This proofs to be especially efficient as problems associated with greedy matching such as occlusion can be easily resolved in 3D. Our approach achieves state-of-the-art results on popular benchmarks and may serve as a baseline for future work.
description: German Conference on Pattern Recognition 2019
title: The effects of phosphorylation on the regulation of Ras localisation in eukaryotic cells
Creators: name: Piper-Brown, Elliot
Publisher: name: University of Kent
Year: 2015

description: Ras proteins are small GTPases that function as regulatory switches linking external environmental stimuli with intracellular effectors to control cell growth and proliferation. Mutations that lead to the constitutive activation of Ras proteins are associated with the development of several human cancers. The localisation of Ras is crucial for its function and this is controlled by post-translational modifications. The genes encoding Ras proteins are highly conserved and yeast serves as a useful model to study the control of localisation and activation. Serine225 has been implicated as a potential phosphorylation site which affects Ras2p localization in S. cerevisiae. The substitution of serine225 with alanine or glutamate suggests that serine225 plays a key role in Ras2p localisation. Although there is significant sequence divergence outside of the GTPase domain and C terminal CAAX box. Sequence alignment between yeast Ras2 and human N-Ras suggests that serine225 and the surrounding sequence are conserved. This study aims to determine whether phosphorylation of human N-Ras regulates activity and localisation when expressed in yeast cells. We have successfully expressed N-Ras in yeast cells and find that it is targeted to the plasma membrane, suggesting that is correctly processed by yeast cells. Modification of the residue equivalent to yeast Ras2 serine225 in N-Ras leads to senescence in the yeast system suggesting that this conserved serine residue is important for function. As the N-Ras human oncogene is linked to many cancers, especially malignant melanomas, the data collected in this study could potentially provide a greater understanding into the activity and regulation of Ras2p and N-Ras, which could be used to aid in the formulation of new strategies for cancer treatment.
On the Brownian gas: a field theory with a Poissonian ground state
Creators: name: Velenich, Andrea
name: Chamon, Claudio
name: Cugliandolo, Leticia F.
name: Kreimer, Dirk
Publisher: name: arXiv
Year: 2008
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: High Energy Physics - Theory (hep-th)
subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: As a first step towards a successful field theory of Brownian particles in interaction, we study exactly the non-interacting case, its combinatorics and its non-linear time-reversal symmetry. Even though the particles do not interact, the field theory contains an interaction term: the vertex is the hallmark of the original particle nature of the gas and it enforces the constraint of a strictly positive density field, as opposed to a Gaussian free field. We compute exactly all the n-point density correlation functions, determine non-perturbatively the Poissonian nature of the ground state and emphasize the futility of any coarse-graining assumption for the derivation of the field theory. We finally verify explicitly, on the n-point functions, the fluctuation-dissipation theorem implied by the time-reversal symmetry of the action.
description: 31 pages
Enhanced production of strange baryons in high energy nuclear collisions from a multiphase transport model
Creators: name: Shao, Tianhao
name: Chen, Jinhui
name: Ko, Che Ming
name: Lin, Zi-Wei
Publisher: name: arXiv
Year: 2020
Subjects: subject: Nuclear Theory (nucl-th)
subject: Nuclear Experiment (nucl-ex)
subject: FOS: Physical sciences

description: We introduce additional coalescence factors for the production of strange baryons in a multiphase transport (AMPT) model in order to describe the enhanced production of multistrange hadrons observed in Pb-Pb collisions at $\rm \sqrt{s_{NN}}$ = 2.76 TeV at the Large hadron Collider (LHC) and Au+Au collisions at $\rm \sqrt{s_{NN}}$ = 200 GeV at Relativistic Heavy-Ion Collider (RHIC).This extended AMPT model is found to also give a reasonable description of the multiplicity dependence of the strangeness enhancement observed in high multiplicity events in $pp$ collisions at $\rm \sqrt{s}$ = 7 TeV and $p$-Pb collisions at $\rm \sqrt{s_{NN}}$ = 5.02 TeV. We find that the coalescence factors depend on the system size but not much on whether the system is produced from A+A or p+A collisions. The extended AMPT model thus provides a convenient way to model the mechanism underlying the observed strangeness enhancement in collisions of both small and large systems at RHIC and LHC energies.
description: 15 pages, 5 figures
Notes on Monotone Recognition in Multi-Valued Grids
Creators: name: Aslanyan, Levon
name: Sahakyan, Hasmik
Publisher: name: arXiv
Year: 2021
Subjects: subject: Discrete Mathematics (cs.DM)
subject: FOS: Computer and information sciences

description: Implementation details of method of monotone recognition, based on partitioning of the grid into the discrete structures isomorphic to binary cubes is presented.
description: MPCS material
Spontaneous radiative decay of translational levels of an atom near a dielectric surface
Creators: name: Kien, Fam Le
name: Hakuta, K.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We study spontaneous radiative decay of translational levels of an atom in the vicinity of a semi-infinite dielectric. We systematically derive the microscopic dynamical equations for the spontaneous decay process. We calculate analytically and numerically the radiative linewidths and the spontaneous transition rates for the translational levels. The roles of the interference between the emitted and reflected fields and of the transmission into the evanescent modes are clearly identified. Our numerical calculations for the silica--cesium interaction show that the radiative linewidths of the bound excited levels with large enough but not too large vibrational quantum numbers are moderately enhanced by the emission into the evanescent modes and those for the deep bound levels are substantially reduced by the surface-induced red shift of the transition frequency.