cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Spatial solitons in thermo-optical media from the nonlinear Schrodinger-Poisson equation and dark matter analogues
Creators: name: Navarrete, Alvaro
name: Paredes, Angel
name: Salgueiro, Jose R.
name: Michinel, Humberto
Publisher: name: arXiv
Year: 2017
Subjects: subject: Optics (physics.optics)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: Pattern Formation and Solitons (nlin.PS)
subject: FOS: Physical sciences

description: We analyze theoretically the Schrodinger-Poisson equation in two transverse dimensions in the presence of a Kerr term. The model describes the nonlinear propagation of optical beams in thermooptical media and can be regarded as an analogue system for a self-gravitating self-interacting wave. We compute numerically the family of radially symmetric ground state bright stationary solutions for focusing and defocusing local nonlinearity, keeping in both cases a focusing nonlocal nonlinearity. We also analyze excited states and oscillations induced by fixing the temperature at the borders of the material. We provide simulations of soliton interactions, drawing analogies with the dynamics of galactic cores in the scalar field dark matter scenario.
description: 13 pages, 11 figures
Chirotactic response of microswimmers in fluids with odd viscosity
Creators: name: Hosaka, Yuto
name: Chatzittofi, Michalis
name: Golestanian, Ramin
name: Vilfan, Andrej
Publisher: name: arXiv
Year: 2024
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: FOS: Physical sciences

description: Odd viscosity is a property of chiral active fluids with broken time-reversal and parity symmetries. We show that the flow of such a fluid around a rotating axisymmetric body is exactly solvable and use this solution to determine the orientational dynamics of surface-driven microswimmers. Swimmers with a force-dipole moment exhibit precession around the axis of the odd viscosity. In addition, pushers show bimodal chirotaxis, i.e., alignment parallel or antiparallel to the axis, while pullers orbit in a plane perpendicular to it. A chiral swimmer that itself has a broken parity symmetry can exhibit unimodal chirotaxis and always align in the same direction.
description: 9 pages, 3 figures + SM
Dissipative Dark Cosmology: From Early Matter Dominance to Delayed Compact Objects
Creators: name: Bramante, Joseph
name: Cappiello, Christopher V.
name: Diamond, Melissa D.
name: Kim, J. Leo
name: Liu, Qinrui
name: Vincent, Aaron C.
Publisher: name: arXiv
Year: 2024
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: We demonstrate a novel mechanism for producing dark compact objects and black holes through a dark sector, where all the dark matter can be dissipative. Heavy dark sector particles with masses above $10^4$ GeV can come to dominate the Universe and yield an early matter-dominated era before Big Bang Nucleosynthesis (BBN). Density perturbations in this epoch can grow and collapse into tiny dark matter halos, which cool via self interactions. The typical halo size is set by the Hubble length once perturbations begin growing, offering a straightforward prediction of the halo size and evolution depending on ones choice of dark matter model. Once these primordial halos have formed, a thermal phase transition can then shift the Universe back into radiation domination and standard cosmology. These halos can continue to collapse after BBN, resulting in the late-time formation of fragmented dark compact objects and sub-solar mass primordial black holes. We find that these compact objects can constitute a sizable fraction of all of dark matter. The resulting fragments can have masses between $10^{20}$ g to $10^{32}$ g, with radii ranging from $10^{-2}$ m to $10^5$ m, while the black holes can have masses between $10^{8}$ g to $10^{34}$ g. Furthermore, a unique feature of this model is the late-time formation of black holes which can evaporate today. We compare where these objects lie with respect to current primordial black hole and and massive (astrophysical) compact halo object constraints.
description: 12 pages, 6 figures. Accepted version
Final Cooling for a High-Energy High-Luminosity Lepton Collider
Creators: name: Neuffer, David
name: Sayed, Hisham
name: Hart, Terry
name: Summers, Don
Publisher: name: arXiv
Year: 2016
Subjects: subject: Accelerator Physics (physics.acc-ph)
subject: FOS: Physical sciences

description: A high-energy muon collider scenario require a "final cooling" system that reduces transverse emittance by a factor of ~10 while allowing longitudinal emittance increase. The baseline approach has low-energy transverse cooling within high-field solenoids, with strong longitudinal heating. This approach and its recent simulation are discussed. Alternative approaches which more explicitly include emittance exchange are also presented. Round-to-flat beam transform, transverse slicing, and longitudinal bunch coalescence are possible components of an alternative approach. Wedge-based emittance exchange could provide much of the required transverse cooling with longitudinal heating. Li-lens and quadrupole focusing systems could also provide much of the required final cooling.
description: 16 pp
最近のオンラインカジノとスロットマシン
Creators: name: Jolyne Cujoh
Publisher: name: Zenodo
Year: 2022
Subjects: Casino
Poker

description: ギャンブルは、今も昔も人を惹きつける魅力があります。ギャンブルのような感覚は、言葉では言い表せません。その魔法のような効果を体験するまでは、それが何であるかはわからないのです。薬のことです。トランプが好きな人、クラップスが好きな人、スロットマシンが好きな人、大金を獲得して突然金持ちになることを期待してカジノに行かない生活は考えられません。カジノ」という言葉自体は、イタリア語で「あまり大きな家ではない」と訳すことができる。リッチなカジノハウスやサロンは、世界のさまざまな都市で見かけることができます。そして、アメリカのラスベガスは、一般的にすべてのギャンブラー、プレーヤー、運命論者のメッカと呼ばれることができます。多くの偉人が金のためにギャンブルを好んだ。一瞬にして財を成し、一瞬にして失う、魅力的なストーリーがいかに多いことか。A・ショーペンハウアーは、「富は海水のようなもので、飲めば飲むほど喉が渇く」と言いました。 しかし、世界は立ち止まってはいない。コンピュータと人工知能の時代である情報技術は、今、私たちを取り巻く環境を変え、人類を変えようとしています。私たちの生活がいろいろな意味で簡素化され、情報の伝達速度が以前は夢にも思わなかったほど速くなったのは、インターネット、ワールドワイドウェブの出現のおかげであろう。 また、インターネットのおかげで、オンラインカジノができるようになりました。自宅で、お気に入りのパジャマを着て、徹夜で、あるいは出勤前の早朝に、パソコンから離れることなく、例えば、https://qyto.com/ja/casino/casinodays/、お金を払ってスロットマシンをプレイすることが可能になったのです。小さな額から途方もない額まで賭けて、勝って、負けて、その興奮を味わってください。私たちの世界では、今やバーチャルな生活とリアルな生活を切り離すことは困難になっています。今では、インターネットに興味のある人なら、すぐに自分の好みのゲームを見つけることができるほど、技術の規模と専門性が高まっています。カードポーカー、ブラックジャック、ルーレット、スロットマシン(ゲームとテーマの選択肢は想像を絶する)など、多種多様なゲームが用意されています。 ギャンブルのあるサイトへの訪問者は、それぞれある望みを叶えることが重要です。例えば、誰もがインターネットフォーラムのレビューに注目し、優れた顧客サポートと高速ペイアウトは、高いボーナスと、もちろん、グラフィックデザインが重要になります。このインターネットサービスを利用するユーザーは、興味のあるゲームの各種大会やコンペティションに興味を持つことでしょう。
description: Other
An extended and refined grid of 3D STAGGER model atmospheres. Processed snapshots for stellar spectroscopy
Creators: name: Díaz, Luisa F. Rodríguez
name: Lagae, Cis
name: Amarsi, Anish M.
name: Bigot, Lionel
name: Zhou, Yixiao
name: Børsen-Koch, Víctor Aguirre
name: Lind, Karin
name: Trampedach, Regner
name: Collet, Remo
Publisher: name: arXiv
Year: 2024
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: FOS: Physical sciences

description: Context: Traditional one-dimensional (1D) hydrostatic model atmospheres introduce systematic modelling errors into spectroscopic analyses of FGK-type stars. Aims: We present an updated version of the STAGGER-grid of 3D model atmospheres, and explore the accuracy of post-processing methods in preparation for spectral synthesis. Methods: New and old models were (re)computed following an updated workflow, including an updated opacity binning technique. Spectroscopic tests were performed in 3D LTE for a grid of 216 fictitious Fe I lines, spanning a wide range in oscillator strength, excitation potential and central wavelength, and eight model atmospheres that cover the stellar atmospheric parameter range (Teff, log g, [Fe/H]) of FGK-type stars. Using this grid, the impact of vertical and horizontal resolution, and temporal sampling of model atmospheres on spectroscopic diagnostics was tested. Results: We find that downsampling the horizontal mesh from its original size of 240 x 240 grid cells to 80 x 80 cells, i.e. sampling every third grid cell, introduces minimal errors on the equivalent width and normalized line flux across the line and stellar parameter space. Regarding temporal sampling, we find that sampling ten statistically independent snapshots is sufficient to accurately model the shape of spectral line profiles. For equivalent widths, a subsample consisting of only two snapshots is sufficient, introducing an abundance error of less than 0.015 dex. Conclusions: We have computed 32 new model atmospheres and recomputed 116 old model atmospheres present in the original grid. The public release of the STAGGER-grid contains 243 models, excluding models with [Fe/H] = -4.00, and the processed snapshots can be used to improve the accuracy of spectroscopic analyses.
Multi-channel ALOHA and CSMA medium-access protocols: Markovian description and large deviations
Creators: name: König, Wolfgang
name: Shafigh, Helia
Publisher: name: Weierstrass Institute
Year: 2022
Subjects: subject: Communication system
subject: random medium access strategies
subject: throughput
subject: multi-channel ALOHA protocol
subject: CSMA
subject: Markov chains
subject: Markov renewal process
subject: large deviations
subject: 60K35
subject: 82C21

description: We consider a multi-channel communication system under ALOHA and CSMA protocols, resepc- tively, in continuous time. We derive probabilistic formulas for the most important quantities: the numbers of sending attempts and the number of successfully delivered messages in a given time interval. We derive (1) explicit formulas for the large-time limiting throughput, (2) introduce an explicit and ergodic Markov chain for a deeper probabilistic analysis, and use this to (3) derive exponential asymptotics for rare events for these quantities in the limit of large time, via large-deviation principles.
Mean-field theory of first-order quantum superconductor-insulator transition
Creators: name: Poboiko, Igor
name: Feigel'man, Mikhail
Publisher: name: arXiv
Year: 2024
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: FOS: Physical sciences

description: Recent experimental studies on strongly disordered indium oxide films have revealed an unusual first-order quantum phase transition between the superconducting and insulating states (SIT). This transition is characterized by a discontinuous jump from non-zero to zero values of superfluid stiffness at the critical point, contradicting the conventional "scaling scenario" typically associated with SIT. In this paper, we present a theoretical framework for understanding this first-order transition. Our approach is based on the concept of competition between two fundamentally distinct ground states that arise from electron pairs initially localized by strong disorder: the superconducting state and the Coulomb glass insulator. These ground states are distinguished by two crucially different order parameters, suggesting a natural expectation of a discontinuous transition between them at $T=0$. This transition occurs when the magnitudes of the superconducting gap $Δ$ and the Coulomb gap $E_C$ become comparable. Additionally, we extend our analysis to low non-zero temperatures and provide a mean-field "phase diagram" in the plane of $(T/Δ,E_C/Δ)$. Our results reveal the existence of a natural upper bound for the kinetic inductance of strongly disordered superconductors.
description: 32 pages, 6 figures
Untitled Item
Creators: name: BHAT, RAMDAS
Publisher: name: figshare
Year: 2022
Subjects: Traditional Chinese medicine and treatments

description: Vanishing white matter (VWM) disease is a type of disorder which mainly affects the brain and spinal cord. This disorder mainly causes deterioration of white matters in Central nervous system specifically the nerve fibres covered with myelin. The basic defect of the disease is caused by mutations in one of the five genes eIF2B1, eIF2B2, eIF2B3, eIF2B4 and eIF2B5 that encodes the five subunits of a protein called eukaryotic translation initiation factor (eIF2B), which is essential for the protein synthesis and regulations in all cells of the body under different stress conditions. VWM disease is characterised by chronic progressive and episodic worsening with ataxia (loss of control of body movements), spasticity (abnormal muscle tightness) and optic atrophy (worsening of vision). This disease is diagnosed on the basis of clinical symptoms in amalgamation with the results of a Magnetic Resonance Imaging (MRI) scan of the brain which shows distinctive pattern of abnormalities in the white matter of the brain.
Phase behavior of charged colloids at a fluid interface
Creators: name: Kelleher, Colm P.
name: Guerra, Rodrigo E.
name: Hollingsworth, Andrew D.
name: Chaikin, Paul M.
Publisher: name: arXiv
Year: 2017
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: FOS: Physical sciences

description: We study the phase behavior of a system of charged colloidal particles that are electrostatically bound to an almost flat interface between two fluids. We show that, despite the fact that our experimental system consists of only $10^{3}$ - $10^{4}$ particles, the phase behavior is consistent with the theory of melting due to Kosterlitz, Thouless, Halperin, Nelson and Young (KTHNY). Using spatial and temporal correlations of the bond-orientational order parameter, we classify our samples into solid, isotropic fluid, and hexatic phases. We demonstrate that the topological defect structure we observe in each phase corresponds to the predictions of KTHNY theory. By measuring the dynamic Lindemann parameter, $γ_{L}(τ)$, and the non-Gaussian parameter, $α_{2}(τ)$, of the displacements of the particles relative to their neighbors, we show that each of the phases displays distinctive dynamical behavior.
Precipitation analysis in the Vallon de Nant catchment - working document
Creators: name: Brauchli, Tristan
name: Michelon, Anthony
name: Ceperley, Natalie
name: Lionel, Benoît
name: Beria, Harsh
name: Schaefli, Bettina
Publisher: name: Zenodo
Year: 2019
Subjects: hydrology, hydrological processes, rainfall, rain gauges, hydrological modelling, Vallon de Nant, Alps, snow

description: This working document presents a short overview of the precipitation data recorded in the Vallon de Nant (VdN, Switzerland) catchment at the newly installed meteo station (since summer 2016), with a comparison to available MeteoSwiss and Canton Vaud stations (all outside of the catchment). The real time data can be accessed at https://www.climaps.com/.
Generating 4-dimensional Wormholes with Yang-Mills Casimir Sources
Creators: name: Santos, A. C. L.
name: Maluf, R. V.
name: Muniz, C. R.
Publisher: name: arXiv
Year: 2024
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: This work presents a new wormhole solution in General Relativity supported by the quantum vacuum fluctuations of the Casimir effect between perfect chromometallic mirrors in $(3+1)$ dimensions, which was recently fitted using first-principle numerical simulations. Initially, we employ a perturbative approach for $x = m r \ll 1$, where $m$ represents the Casimir mass. This approach has proven to be a reasonable approximation when compared with the exact case in this regime. To find well-behaved redshift functions, we impose constraints on the free parameters. As expected, this solution recovers the electromagnetic-like Casimir solution for $m = 0$. Analyzing the traversability conditions, we graphically find that all will be satisfied for $ 0 \leq m \leq 0.20$. On the other hand, all the energy conditions are violated, as usual in this context. Stability from Tolman-Oppenheimer-Volkov (TOV) equation is guaranteed for all $r$ and from the speed of sound for $0.16 \le m \le 0.18$. Therefore, for $0.16 \leq m \leq 0.18$, we will have a stable solution that satisfies all traversability conditions.
description: 16 pages, 9 figures, Improved and accepted version for publication in Annals of Physics
Probing Heavy Neutrino Magnetic Moments at the LHC using Long-Lived Particle Searches
Creators: name: Beltrán, Rebeca
name: Bolton, Patrick D.
name: Deppisch, Frank F.
name: Hati, Chandan
name: Hirsch, Martin
Publisher: name: arXiv
Year: 2024
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We explore long-lived particle (LLP) searches using non-pointing photons at the LHC as a probe for sterile-to-sterile and active-to-sterile transition magnetic dipole moments of sterile neutrinos. We consider heavy sterile neutrinos with masses ranging from a few~GeV to several hundreds of GeV. We discuss transition magnetic dipole moments using the Standard Model effective field theory and low-energy effective field theory extended by sterile neutrinos ($N_R$SMEFT and $N_R$LEFT) and also provide a simplified UV-complete model example. LLP searches at the LHC using non-pointing photons will probe sterile-to-sterile dipole moments two orders of magnitude below the current best constraints from LEP, while an unprecedented sensitivity to sterile neutrino mass of about 700 GeV is expected for active-to-sterile dipole moments. For the UV model example with one-loop transition magnetic moments, the searches for charged lepton flavour violating processes in synergy with LLP searches at the LHC can probe new physics at several TeV mass scales and provide valuable insights into the lepton flavour structure of new physics couplings.
description: New version matches the journal published version
Differential phase contrast from electrons that cause inner shell ionization
Creators: name: Deimetry, Michael
name: Petersen, Timothy C.
name: Brown, Hamish G.
name: Weyland, Matthew
name: Findlay, Scott D.
Publisher: name: arXiv
Year: 2024
Subjects: subject: Other Condensed Matter (cond-mat.other)
subject: FOS: Physical sciences

description: Differential Phase Contrast (DPC) imaging, in which deviations in the bright field beam are in proportion to the electric field, has been extensively studied in the context of pure elastic scattering. Here we discuss differential phase contrast formed from core-loss scattered electrons, i.e. those that have caused inner shell ionization of atoms in the specimen, using a transition potential approach for which we study the number of final states needed for a converged calculation. In the phase object approximation, we show formally that differential phase contrast formed from core-loss scattered electrons is mainly a result of preservation of elastic contrast. Through simulation we demonstrate that whether the inelastic DPC images show element selective contrast depends on the spatial range of the ionization interaction, and specifically that when the energy loss is low the delocalisation can lead to contributions to the contrast from atoms other than that ionized. We further show that inelastic DPC images remain robustly interpretable to larger thicknesses than is the case for elastic DPC images, owing to the incoherence of the inelastic wavefields, though subtleties due to channelling remain. Lastly, we show that while a very high dose will be needed for sufficient counting statistics to discern differential phase contrast from core-loss scattered electrons, there is some enhancement of signal-to-noise ratio with thickness that makes inelastic DPC imaging more achievable for thicker samples.
Quantum entanglement and non-Gaussianity in the primordial Universe
Creators: name: Bergeron, Herve
name: Malkiewicz, Przemyslaw
name: Peter, Patrick
Publisher: name: arXiv
Year: 2024
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We propose a new method to investigate signatures of a quantum gravity phase in the primordial state of cosmological perturbations. We formulate and study a quantum model of a perturbed Friedmann-Lemaitre-Robertson-Walker universe beyond a tensor-product Born-Oppenheimer-like factorization, that is, without restricting the wave function of the universe to the product of the background and perturbation wave functions. We show that the quantum dynamics generically does not preserve the product form of the universe's wave function, which spontaneously evolves into a more general entangled state. Upon expanding this state in a suitable basis of background wave functions and setting Gaussian initial conditions for the perturbations, we numerically find that each of these wave functions becomes associated with a non-Gaussian state of an inhomogeneous perturbation.
description: 10 pages, 7 figures
ДВИЖЕНИЕ ИСТОРИЧЕСКОЙ РЕКОНСТРУКЦИИ ХОРЕОГРАФИЧЕСКОГО ТВОРЧЕСТВА И ОБРАЗОВАНИЯ В УЗБЕКИСТАНЕ: ВКЛАД ПЕДАГОГОВ РУССКОЙ БАЛЕТНОЙ ШКОЛЫ
Creators: name: Громова, Е.В.
name: Таирова, Ю.Р.
Publisher: name: Zenodo
Year: 2024

description: В данной статье представлен подробный анализ историографии хореографического творчества и образования в Узбекистане с акцентом на значительный вклад педагогов Русской школы балета. Этот вклад заложил основы развития профессионального балетного искусства в Узбекистане и оказал существенное влияние на формирование и становление Национальной хореографической школы Узбекистана.
Ultraviolet C II and Si III Transit Spectroscopy and Modeling of the Evaporating Atmosphere of GJ436b
Creators: name: Loyd, R. O. Parke
name: Koskinen, T. T.
name: France, Kevin
name: Schneider, Christian
name: Redfield, Seth
Publisher: name: arXiv
Year: 2016
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: FOS: Physical sciences

description: Hydrogen gas evaporating from the atmosphere of the hot-Neptune GJ436b absorbs over 50% of the stellar Ly$α$ emission during transit. Given the planet's atmospheric composition and energy-limited escape rate, this hydrogen outflow is expected to entrain heavier atoms such as C and O. We searched for C and Si in the escaping atmosphere of GJ436b using far-ultraviolet HST COS G130M observations made during the planet's extended H I transit. These observations show no transit absorption in the C II 1334,1335 Å and Si III 1206 Å lines integrated over [-100, 100] km s$^{-1}$, imposing 95% (2$σ$) upper limits of 14% (C II) and 60% (Si III) depth on the transit of an opaque disk and 22% (C II) and 49% (Si III) depth on an extended, highly asymmetric transit similar to that of H I Ly$α$. C$^+$ is likely present in the outflow according to a simulation we carried out using a spherically-symmetric, photochemical-hydrodynamical model. This simulation predicts a $\sim$2% transit over the integrated bandpass, consistent with the data. At line center, we predict the C II transit depth to be as high as 19%. Our model predicts a neutral hydrogen escape rate of $1.6\times10^{9}$ g s$^{-1}$ ($3.1\times10^{9}$ g s$^{-1}$ for all species) for an upper atmosphere composed of hydrogen and helium.
description: 7 pages, 4 figures, 1 table; accepted to ApJ Letters
Generation of quantum phases of matter and finding a maximum-weight independent set of unit-disk graphs using Rydberg atoms
Creators: name: Farouk, Ahmed M.
name: Beterov, I. I.
name: Xu, Peng
name: Ryabtsev, I. I.
Publisher: name: arXiv
Year: 2024
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Recent progress in quantum computing and quantum simulation of many-body systems with arrays of neutral atoms using Rydberg excitation has provided unforeseen opportunities towards computational advantage in solving various optimization problems. The problem of a maximum-weight independent set of unit-disk graphs is an example of an NP-hard optimization problem. It involves finding the largest set of vertices with the maximum sum of their weights for a graph which has edges connecting all pairs of vertices within a unit distance. This problem can be solved using quantum annealing with an array of interacting Rydberg atoms. For a particular graph, a spatial arrangement of atoms represents vertices of the graph, while the detuning from resonance at Rydberg excitation defines the weights of these vertices. The edges of the graph can be drawn according to the unit disk criterion. Maximum-weight independent sets can be obtained by applying a variational quantum adiabatic algorithm. We consider driving the quantum system of interacting atoms to the many-body ground state using a non-linear quasi-adiabatic profile for sweeping the Rydberg detuning. We also propose using a quantum wire which is a set of auxiliary atoms of a different chemical element to mediate strong coupling between the remote vertices of the graph. We investigate this effect for different lengths of the quantum wire. We also investigate the quantum phases of matter realizing commensurate and incommensurate phases in one- and two-dimensional spatial arrangements of the atomic array.
description: 13 pages, 9 figures
Microscopic modeling and analysis of collective decision making: equality bias leads suboptimal solutions
Creators: name: Vellucci, Pierluigi
name: Zanella, Mattia
Publisher: name: arXiv
Year: 2017
Subjects: subject: Physics and Society (physics.soc-ph)
subject: Adaptation and Self-Organizing Systems (nlin.AO)
subject: FOS: Physical sciences

description: We discuss a novel microscopic model for collective decision-making interacting multi-agent systems. In particular we are interested in modeling a well known phenomena in the experimental literature called equality bias, where agents tend to behave in the same way as if they were as good, or as bad, as their partner. We analyze the introduced problem and we prove the suboptimality of the collective decision-making in the presence of equality bias. Numerical experiments are addressed in the last section.
Front interaction induces excitable behavior
Creators: name: Parra-Rivas, P.
name: Matias, M. A.
name: Colet, P.
name: Gelens, L.
name: Walgraef, D.
name: Gomila, D.
Publisher: name: arXiv
Year: 2017
Subjects: subject: Pattern Formation and Solitons (nlin.PS)
subject: Dynamical Systems (math.DS)
subject: FOS: Physical sciences
subject: FOS: Mathematics

description: Spatially extended systems can support local transient excitations in which just a part of the system is excited. The mechanisms reported so far are local excitability and excitation of a localized structure. Here we introduce an alternative mechanism based on the coexistence of two homogeneous stable states and spatial coupling. We show the existence of a threshold for perturbations of the homogeneous state. Sub-threshold perturbations decay exponentially. Super-threshold perturbations induce the emergence of a long-lived structure formed by two back to back fronts that join the two homogeneous states. While in typical excitability the trajectory follows the remnants of a limit cycle, here reinjection is provided by front interaction, such that fronts slowly approach each other until eventually annihilating. This front-mediated mechanism shows that extended systems with no oscillatory regimes can display excitability.
description: 5 pages, 5 figures
“Creating a Holistic Fabric of Services and Collections from the Inside Out: Exploring Convergences of Liaison and Special Collections Librarianship.” Research Library Issues, no. 291 (2017): 32–49. https://doi.org/10.29242/rli.291.4.
Creators: name: Totleben, Kristen
name: Lacher-Feldman, Jessica
Publisher: name: University of Rochester
Year: 2023
Subjects: classificationCode: 46
subject: Information and computing sciences

description: The work of liaison librarians and special collections librarians could more closely mirror and support the scholarship process if the expertise of both specializations are holistically considered and, when relevant, cooperatively combined.
Evidence for conventional superconductivity in Sr0.1Bi2Se3 from high pressure studies
Creators: name: Manikandan, K.
name: Shruti
name: Neha, P.
name: Maurya, V.
name: Selvan, G. Kalai
name: Wang, B.
name: Uwatoko, Y.
name: Ishigaki, K.
name: Jha, R.
name: Awana, V. P. S.
name: Arumugam, S.
name: Patnaik, S.
Publisher: name: arXiv
Year: 2017
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: SrxBi2Se3 is recently reported to be a superconductor derived from topological insulator Bi2Se3. It shows a maximum resistive Tc of 3.25 K at ambient pressure. We report magnetic (upto 1 GPa) and transport properties (upro 8 Gpa) under pressure for single crystalline Sr0.1Bi2Se3 superconductor. Magnetic measurements show that Tc decreases from ~2.6 K (0 GPa) to ~1.9 K (0.81 GPa). Similar behavior is observed in transport properties as well without much change in the metallic characteristics in normal state resistivity. No reentrant superconducting phase (Physical Review B 93, 144514 (2016)) is observed at high pressure. Normal state resistivity near Tc is explained by Fermi liquid model. Above 100 K, a polaronic hopping conduction mechanism with two parallel channels for current flow is indicated. Band structure calculations indicate decreasing density of states at Fermi level with pressure. In consonance with transition temperature suppression in conventional BCS low Tc superconductors, the pressure effect in SrxBi2Se3 is well accounted by pressure induced band broadening.
Kristen Totleben and Jessica Lacher- Feldman. “Creating a Holistic Fabric of Services and Collections from the Inside Out: Exploring Convergences of Liaison and Special Collections Librarianship.” Research Library Issues, no. 291 (2017): 32–49. https://doi.org/10.29242/rli.291.4.
Creators: name: Totleben, Kristen
name: Lacher-Feldman, Jessica
Publisher: name: University of Rochester
Year: 2023
Subjects: classificationCode: 46
subject: Information and computing sciences

description: The work of liaison librarians and special collections librarians could more closely mirror and support the scholarship process if the expertise of both specializations are holistically considered and, when relevant, cooperatively combined.
Relaxation to Negative Temperatures in Double Domain Systems
Creators: name: Hama, Yusuke
name: Munro, William J.
name: Nemoto, Kae
Publisher: name: arXiv
Year: 2016
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We investigate the relaxation of two collective spins in double domain system, which are individually coupled to a single bosonic reservoir, by varying the total number of spins in each domain and their initial spin configurations. A particularly interesting situation occurs when the spin domains are set in an antiparallel configuration. Further for an unbalanced configuration where the number of spins are in the excited state initially is much greater than that in the ground state, the spin ensemble prepared in the ground state relaxes towards a negative-temperature state.
description: 5 pages, 5 figures
QALQONSIMON BEZ SARATONI ZAMONAVIY INSTRUMENTAL TASHXISLASH USULLARI
Creators: name: Zaretdinov, Damir
name: Alimdjonov, Nusratjon
name: Nurmuhamedov, Doniyorbek
name: Omiljonov, Murodjon
Publisher: name: Zenodo
Year: 2024

description: Ushbu tadqiqot qalqonsimon bez saratonini instrumental tekshiruvlar orqali tashxislash va ularning samaradorligini baholashdan iborat. Bu yerda akademik Y.X.To‘raqulov nomidagi RIEIAT markazida UTT, MRT va OFEKT/KT yordamida ularning qalqonsimon bez diagnostikasida tutgan o‘rni, afzalliklari va kamchiliklari o‘rganildi.
The Complexity of Translationally-Invariant Low-Dimensional Spin Lattices in 3D
Creators: name: Bausch, Johannes
name: Piddock, Stephen
Publisher: name: arXiv
Year: 2017
Subjects: subject: Quantum Physics (quant-ph)
subject: Computational Complexity (cs.CC)
subject: FOS: Physical sciences
subject: FOS: Computer and information sciences
subject: 68Q17, 81V70, 68Q10, 82D25

description: In this paper, we consider spin systems in three spatial dimensions, and prove that the local Hamiltonian problem for 3D lattices with face-centered cubic unit cells, 4-local translationally-invariant interactions between spin-3/2 particles and open boundary conditions is QMAEXP-complete. We go beyond a mere embedding of past hard 1D history state constructions, and utilize a classical Wang tiling problem as binary counter in order to translate one cube side length into a binary description for the verifier input. We further make use of a recently-developed computational model especially well-suited for history state constructions, and combine it with a specific circuit encoding shown to be universal for quantum computation. These novel techniques allow us to significantly lower the local spin dimension, surpassing the best translationally-invariant result to date by two orders of magnitude (in the number of degrees of freedom per coupling). This brings our models en par with the best non-translationally-invariant construction.
description: 20 pages. 3 figures in main text; with technical appendix
Hyperspectral Image Reconstruction for Predicting Chick Embryo Mortality Towards Advancing Egg and Hatchery Industry
Creators: name: Ahmed, Md. Toukir
name: Ahmed, Md Wadud
name: Monjur, Ocean
name: Emmert, Jason Lee
name: Chowdhary, Girish
name: Kamruzzaman, Mohammed
Publisher: name: arXiv
Year: 2024
Subjects: subject: Image and Video Processing (eess.IV)
subject: Computer Vision and Pattern Recognition (cs.CV)
subject: FOS: Electrical engineering, electronic engineering, information engineering
subject: FOS: Computer and information sciences

description: As the demand for food surges and the agricultural sector undergoes a transformative shift towards sustainability and efficiency, the need for precise and proactive measures to ensure the health and welfare of livestock becomes paramount. In the context of the broader agricultural landscape outlined, the application of Hyperspectral Imaging (HSI) takes on profound significance. HSI has emerged as a cutting-edge, non-destructive technique for fast and accurate egg quality analysis, including the detection of chick embryo mortality. However, the high cost and operational complexity compared to conventional RGB imaging are significant bottlenecks in the widespread adoption of HSI technology. To overcome these hurdles and unlock the full potential of HSI, a promising solution is hyperspectral image reconstruction from standard RGB images. This study aims to reconstruct hyperspectral images from RGB images for non-destructive early prediction of chick embryo mortality. Firstly, the performance of different image reconstruction algorithms, such as HRNET, MST++, Restormer, and EDSR were compared to reconstruct the hyperspectral images of the eggs in the early incubation period. Later, the reconstructed spectra were used to differentiate live from dead chick-producing eggs using the XGBoost and Random Forest classification methods. Among the reconstruction methods, HRNET showed impressive reconstruction performance with MRAE of 0.0955, RMSE of 0.0159, and PSNR of 36.79 dB. This study motivated that harnessing imaging technology integrated with smart sensors and data analytics has the potential to improve automation, enhance biosecurity, and optimize resource management towards sustainable agriculture 4.0.
description: Under review
Form factors, spectral and Källén-Lehmann representation in nonlocal quantum gravity
Creators: name: Briscese, Fabio
name: Calcagni, Gianluca
name: Modesto, Leonardo
name: Nardelli, Giuseppe
Publisher: name: arXiv
Year: 2024
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: We discuss the conical region of convergence of exponential and asymptotically polynomial form factors and their integral representations. Then, we calculate the spectral representation of the propagator of nonlocal theories with entire form factors, in particular, of the above type. The spectral density is positive-definite and exhibits the same spectrum as the local theory. We also find that the piece of the propagator corresponding to the time-ordered two-point correlation function admits a generalization of the Källén-Lehmann representation with a standard momentum dependence and a spectral density differing from the local one only in the presence of interactions. These results are in agreement with what already known about the free theory after a field redefinition and about perturbative unitarity of the interacting theory. The spectral and Källén-Lehmann representations have the same standard local limit, which is recovered smoothly when sending the fundamental length scale $\ell_*$ in the form factor to zero.
description: 1+31 pages, 1 figure. v2: definition of nonlocal operators and local limit clarified
Triangle Finding and Listing in CONGEST Networks
Creators: name: Izumi, Taisuke
name: Gall, François Le
Publisher: name: arXiv
Year: 2017
Subjects: subject: Distributed, Parallel, and Cluster Computing (cs.DC)
subject: Data Structures and Algorithms (cs.DS)
subject: FOS: Computer and information sciences

description: Triangle-free graphs play a central role in graph theory, and triangle detection (or triangle finding) as well as triangle enumeration (triangle listing) play central roles in the field of graph algorithms. In distributed computing, algorithms with sublinear round complexity for triangle finding and listing have recently been developed in the powerful CONGEST clique model, where communication is allowed between any two nodes of the network. In this paper we present the first algorithms with sublinear complexity for triangle finding and triangle listing in the standard CONGEST model, where the communication topology is the same as the topology of the network. More precisely, we give randomized algorithms for triangle finding and listing with round complexity $O(n^{2/3}(\log n)^{2/3})$ and $O(n^{3/4}\log n)$, respectively, where $n$ denotes the number of nodes of the network. We also show a lower bound $Ω(n^{1/3}/\log n)$ on the round complexity of triangle listing, which also holds for the CONGEST clique model.
description: To appear in PODC 2017
Degrees of Freedom in modified Teleparallel Gravity
Creators: name: Golovnev, Alexey
Publisher: name: arXiv
Year: 2024
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Theory (hep-th)
subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: I discuss the issue of degrees of freedom in modified teleparallel gravity. These theories do have an extra structure on top of the usual (pseudo)Riemannian manifold, that of a flat parallel transport. This structure is absolutely abstract and unpredictable (pure gauge) in GR-equivalent models, however it becomes physical upon modifications. The problem is that, in the most popular models, this local symmetry is broken but not stably so, hence the infamous strong coupling issues. The Hamiltonian analyses become complicated and with contradictory results. A funny point is that what we see in available linear perturbation treatments of $f(T)$ gravity is much closer to the analysis with less dynamical degrees of freedom which has got a well-known mistake in it, while the more accurate work predicts much more of dynamics than what has ever been seen up to now. I discuss possible reasons behind this puzzle, and also argue in favour of studying the most general New GR models which are commonly ignored due to suspicion of ghosts.
description: Prepared for Proceedings of XII Bolyai-Gauss-Lobachevsky Conference (BGL-2024): Non-Euclidean Geometry in Modern Physics and Mathematics; 10 pages; minor changes
Cross-damping effects in 1S-3S spectroscopy of hydrogen and deuterium
Creators: name: Fleurbaey, Hélène
name: Biraben, François
name: Julien, Lucile
name: Karr, Jean-Philippe
name: Nez, François
Publisher: name: arXiv
Year: 2017
Subjects: subject: Atomic Physics (physics.atom-ph)
subject: FOS: Physical sciences

description: We calculate the cross-damping frequency shift of a laser-induced two-photon transition monitored through decay fluorescence, by adapting the analogy with Raman scattering developed by Amaro et al. [P. Amaro et al., PRA 92, 022514 (2015)]. We apply this method to estimate the frequency shift of the 1S-3S transition in hydrogen and deuterium. Taking into account our experimental conditions, we find a frequency shift of less than 1 kHz, that is smaller than our current statistical uncertainty.
description: 7 pages, 5 figures
Emergence of metastability in frustrated oscillatory networks: the key role of hierarchical modularity
Creators: name: Caprioglio, Enrico
name: Berthouze, Luc
Publisher: name: arXiv
Year: 2024
Subjects: subject: Biological Physics (physics.bio-ph)
subject: Adaptation and Self-Organizing Systems (nlin.AO)
subject: FOS: Physical sciences

description: Oscillatory complex networks in the metastable regime have been used to study the emergence of integrated and segregated activity in the brain, which are hypothesised to be fundamental for cognition. Yet, the parameters and the underlying mechanisms necessary to achieve the metastable regime are hard to identify, often relying on maximising the correlation with empirical functional connectivity dynamics. Here, we propose and show that the brain's hierarchically modular mesoscale structure alone can give rise to robust metastable dynamics and (metastable) chimera states in the presence of phase frustration. We construct unweighted $3$-layer hierarchical networks of identical Kuramoto-Sakaguchi oscillators, parameterized by the average degree of the network and a structural parameter determining the ratio of connections between and within blocks in the upper two layers. Together, these parameters affect the characteristic timescales of the system. Away from the critical synchronization point, we detect the emergence of metastable states in the lowest hierarchical layer coexisting with chimera and metastable states in the upper layers. Using the Laplacian renormalization group flow approach, we uncover two distinct pathways towards achieving the metastable regimes detected in these distinct layers. In the upper layers, we show how the symmetry-breaking states depend on the slow eigenmodes of the system. In the lowest layer instead, metastable dynamics can be achieved as the separation of timescales between layers reaches a critical threshold. Our results show an explicit relationship between metastability, chimera states, and the eigenmodes of the system, bridging the gap between harmonic based studies of empirical data and oscillatory models.
Efimov effect for a three-particle system with two identical fermions
Creators: name: Basti, Giulia
name: Teta, Alessandro
Publisher: name: arXiv
Year: 2017
Subjects: subject: Mathematical Physics (math-ph)
subject: Quantum Gases (cond-mat.quant-gas)
subject: FOS: Physical sciences

description: We consider a three-particle quantum system in dimension three composed of two identical fermions of mass one and a different particle of mass $m$. The particles interact via two-body short range potentials. We assume that the Hamiltonians of all the two-particle subsystems do not have bound states with negative energy and, moreover, that the Hamiltonians of the two subsystems made of a fermion and the different particle have a zero-energy resonance. Under these conditions and for $mm^*$ the number of negative eigenvalues of $H$ is finite and for $m
description: 26 pages
SOCIO-PHILOSOPHICAL ASPECTS OF ENSURING INFORMATION SECURITY IN SOCIETY AND THE ROLE OF THE CONCEPT OF PUBLIC SECURITY IN IT
Creators: name: Osarov, Farrukh
Publisher: name: Zenodo
Year: 2024

description: In the article, the socio-philosophical aspects of ensuring information security in the society, its necessity, the fact that it is an actual issue today, and the role of the concept of public security in this process are analyzed. The role of information technologies in public safety is explained in detail. In addition, conclusions and suggestions on increasing the role of information technologies in public security have been developed.
Grid-converged Solution and Analysis of the Unsteady Viscous Flow in a Two-dimensional Shock Tube
Creators: name: Zhou, Guangzhao
name: Xu, Kun
name: Liu, Feng
Publisher: name: arXiv
Year: 2017
Subjects: subject: Fluid Dynamics (physics.flu-dyn)
subject: FOS: Physical sciences

description: The flow in a shock tube is extremely complex with dynamic multi-scale structures of sharp fronts, flow separation, and vortices due to the interaction of the shock wave, the contact surface, and the boundary layer over the side wall of the tube. Prediction and understanding of the complex fluid dynamics is of theoretical and practical importance. It is also an extremely challenging problem for numerical simulation, especially at relatively high Reynolds numbers. Daru & Tenaud (Daru, V. & Tenaud, C. 2001 Evaluation of TVD high resolution schemes for unsteady viscous shocked flows. Computers & Fluids 30, 89-113) proposed a two-dimensional model problem as a numerical test case for high-resolution schemes to simulate the flow field in a square closed shock tube. Though many researchers have tried this problem using a variety of computational methods, there is not yet an agreed-upon grid-converged solution of the problem at the Reynolds number of 1000. This paper presents a rigorous grid-convergence study and the resulting grid-converged solutions for this problem by using a newly-developed, efficient, and high-order gas-kinetic scheme. Critical data extracted from the converged solutions are documented as benchmark data. The complex fluid dynamics of the flow at Re = 1000 are discussed and analysed in detail. Major phenomena revealed by the numerical computations include the downward concentration of the fluid through the curved shock, the formation of the vortices, the mechanism of the shock wave bifurcation, the structure of the jet along the bottom wall, and the Kelvin-Helmholtz instability near the contact surface.
Gamma-ray line emission from the Local Bubble
Creators: name: Siegert, Thomas
name: Schulreich, Michael M.
name: Bauer, Niklas
name: Reinhardt, Rudi
name: Mittal, Saurabh
name: Yoneda, Hiroki
Publisher: name: arXiv
Year: 2024
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: Deep-sea archives that include intermediate-lived radioactive $^{60}\mathrm{Fe}$ particles suggest the occurrence of several recent supernovae inside the present-day volume of the Local Bubble during the last $\sim 10$ Myr. The isotope $^{60}\mathrm{Fe}$ is mainly produced in massive stars and ejected in supernova explosions, which should always result in a sizeable yield of $^{26}\mathrm{Al}$ from the same objects. $^{60}\mathrm{Fe}$ and $^{26}\mathrm{Al}$ decay with lifetimes of 3.82 and 1.05 Myr, and emit $γ$-rays at 1332 and 1809 keV, respectively. These $γ$-rays have been measured as diffuse glow of the Milky Way, and would also be expected from inside the Local Bubble as foreground emission. Based on two scenarios, one employing a geometrical model and the other state-of-the-art hydrodynamics simulations, we estimate the expected fluxes of the 1332 and 1809 keV $γ$-ray lines, as well as the resulting 511 keV line from positron annihilation due to the $^{26}\mathrm{Al}$ $β^+$-decay. We find fluxes in the range of $10^{-6}$-$10^{-5}\,\mathrm{ph\,cm^{-2}\,s^{-1}}$ for all three lines with isotropic contributions of 10-50%. We show that these fluxes are within reach for the upcoming COSI-SMEX $γ$-ray telescope over its nominal satellite mission duration of 2 yr. Given the Local Bubble models considered, we conclude that in the case of 10-20 Myr-old superbubbles, the distributions of $^{60}\mathrm{Fe}$ and $^{26}\mathrm{Al}$ are not co-spatial - an assumption usually made in $γ$-ray data analyses. In fact, this should be taken into account however when analysing individual nearby targets for their $^{60}\mathrm{Fe}$ to $^{26}\mathrm{Al}$ flux ratio as this gauges the stellar evolution models and the age of the superbubbles. A flux ratio measured for the Local Bubble could further constrain models of $^{60}\mathrm{Fe}$ deposition on Earth and its moon.
description: accepted in A&A, 18 pages, 13 figures, 2 tables