cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
A robust parallel algorithm for combinatorial compressed sensing
Creators: name: Mendoza-Smith, Rodrigo
name: Tanner, Jared
name: Wechsung, Florian
Publisher: name: arXiv
Year: 2017
Subjects: subject: Numerical Analysis (math.NA)
subject: Information Theory (cs.IT)
subject: FOS: Mathematics
subject: FOS: Computer and information sciences

description: In previous work two of the authors have shown that a vector $x \in \mathbb{R}^n$ with at most $k < n$ nonzeros can be recovered from an expander sketch $Ax$ in $\mathcal{O}(\mathrm{nnz}(A)\log k)$ operations via the Parallel-$\ell_0$ decoding algorithm, where $\mathrm{nnz}(A)$ denotes the number of nonzero entries in $A \in \mathbb{R}^{m \times n}$. In this paper we present the Robust-$\ell_0$ decoding algorithm, which robustifies Parallel-$\ell_0$ when the sketch $Ax$ is corrupted by additive noise. This robustness is achieved by approximating the asymptotic posterior distribution of values in the sketch given its corrupted measurements. We provide analytic expressions that approximate these posteriors under the assumptions that the nonzero entries in the signal and the noise are drawn from continuous distributions. Numerical experiments presented show that Robust-$\ell_0$ is superior to existing greedy and combinatorial compressed sensing algorithms in the presence of small to moderate signal-to-noise ratios in the setting of Gaussian signals and Gaussian additive noise.
Schrödinger cat and Werner state disentanglement simulated by trapped ion systems
Creators: name: Bittencourt, Victor A. S. V.
name: Bernardini, Alex E.
Publisher: name: arXiv
Year: 2017
Subjects: subject: Quantum Physics (quant-ph)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: Disentanglement and loss of quantum correlations due to one global collective noise effect are described for two-qubit Schrödinger cat and Werner states of a four level trapped ion quantum system. Once the Jaynes-Cummings ionic interactions are mapped onto a Dirac spinor structure, the elementary tools for computing quantum correlations of two-qubit ionic states are provided. With two-qubit quantum numbers related to the total angular momentum and to its projection onto the direction of an external magnetic field (which lifts the degeneracy of the ion's internal levels), a complete analytical profile of entanglement for the Schrödinger cat and Werner states is obtained. Under vacuum noise (during spontaneous emission), the two-qubit entanglement in the Schrödinger cat states is shown to vanish asymptotically. Otherwise, the robustness of Werner states is concomitantly identified, with the entanglement content recovered by their noiseless-like evolution. Most importantly, our results point to a firstly reported sudden transition between classical and quantum decay regimes driven by a classical collective noise on the Schrödinger cat states, which has been quantified by the geometric discord.
description: 22 pages, 4 figures
The new Herschel/PACS Point Source Catalogue
Creators: name: Marton, Gábor
name: Gezer, Ilknur
name: Madarász, Máté
name: Dionatos, Odysseas
name: Audard, Marc
name: Roquette, Julia
name: Hernandez, David
name: Paladini, Roberta
name: Altieri, Bruno
Publisher: name: arXiv
Year: 2024
Subjects: subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: FOS: Physical sciences

description: Herschel operated as an observatory, therefore it did not cover the whole sky, but still observed ~8% of it. The first version of an overall Herschel/PACS Point Source Catalogue was released in 2017. The data are still unique and are very important for research, especially because no new far-infrared mission is foreseen for at least the next decade. In the framework of the NEMESIS project, we revisited all the photometric observations obtained by the PACS instrument on-board of the Herschel space observatory.
 We aimed to build the most complete and most accurate Herschel/PACS catalogue to date. Our primary goal was to increase the number of real sources, and decrease the number of spurious sources identified on a strongly variable background. Our goal was to build a blind catalogue, meaning that source extraction is conducted without relying on prior detections at various wavelengths, allowing us to detect sources never catalogued before.
 We define a hybrid strategy that includes classical and ML source identification and characterisation methods, providing catalogues at much higher completeness levels than before. Quality assessment also involves ML techniques. Our source extraction methodology facilitates a systematic and impartial comparison of sensitivity levels across various Herschel fields, a task that was typically beyond the scope of individual programs.
 We created a high-reliability and a rejected source catalogue for each PACS passband, i.e., at 70, 100, and 160 μm. With the high-reliability catalogue, we managed to significantly increase the completeness in all bands. At the same time, while the number of high-reliability detections decreased, the number of sources matching with existing catalogues increased, suggesting that the purity is also higher than before. The photometric accuracy of our pipeline is ~1% based on comparison with the standard star models.
description: accepted for publication in Astronomy&Astrophysics, article reference: aa50032-24
Asymptotic behavior of a delayed wave equation without displacement term
Creators: name: Ammari, Kaïs
name: Chentouf, Boumediène
Publisher: name: arXiv
Year: 2017
Subjects: subject: Analysis of PDEs (math.AP)
subject: FOS: Mathematics
subject: 34B05, 34D05, 70J25, 93D15

description: This paper is dedicated to the investigation of the asymptotic behavior of a delayed wave equation without the presence of any position term. First, it is shown that the problem is well-posed in the sense of semigroups theory. Thereafter, LaSalle's invariance principle is invoked in order to establish the asymptotic convergence for the solutions of the system to a stationary position which depends on the initial data. More importantly, without any geometric condition such as BLR condition in the control zone, the logarithmic convergence is proved by using an interpolation inequality combined with a resolvent method.
ТОШКЕНТ ВИЛОЯТИДА ЖИНОЯТЧИЛИККА ҚАРШИ КУРАШИШ СОҲАСИДА МИНТАҚАВИЙ ҲАМКОРЛИКНИ РИВОЖЛАНТИРИШ МАСАЛАЛАРИ
Creators: name: Кадиров, Хотам
Publisher: name: Zenodo
Year: 2024

description: Ҳозирги кунда дунё ҳамжамиятидаги барча давлатлар иқтисодий, ижтимоий, сиёсий, маданий ва бошқа соҳаларда ўзаро узвий алоқадор. Шу боис дунёдаги ҳеч бир давлат бошқа давлатлардан айро ҳолда, юқорида қайд этилган ва бошқа соҳаларда муносабатга киришмасдан ривожлана олмайди.
Abelian scalar theory at large global charge
Creators: name: Loukas, Orestis
Publisher: name: arXiv
Year: 2016
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We elaborate on Abelian complex scalar models, which are dictated by natural actions (all couplings are of order one), at fixed and large global $U(1)$ charge in an arbitrary number of dimensions. The ground state $| \upsilon\rangle$ is coherently constructed by the zero modes and the appearance of a centrifugal potential is quantum mechanically verified. Using the path integral formulation we systematically analyze the quantum fluctuations around $| \upsilon\rangle$ in order to derive an effective action for the Goldstone mode, which becomes perturbatively meaningful when the charge is large. In this regime we explicitly show that the whole construction is stable against quantum corrections, in the sense that any higher derivative couplings to Goldstone's tree-level action are suppressed by appropriate powers of the large charge.
description: 24+1 pages, 2 figures
Highly Anisotropic Superconducting Gap in Nematically Ordered and Tetragonal Phases of FeSe$_{1-x}$S$_x$
Creators: name: Sato, Y.
name: Kasahara, S.
name: Taniguchi, T.
name: Xing, X. Z.
name: Kasahara, Y.
name: Tokiwa, Y.
name: Shibauchi, T.
name: Matsuda, Y.
Publisher: name: arXiv
Year: 2017
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: FeSe has a unique ground state in which superconductivity coexists with a nematic order without long-range magnetic ordering at ambient pressure. Here, to study how the pairing interaction evolves with nematicity, we measured the thermal conductivity and specific heat of FeSe$_{1-x}$S$_x$, where the nematicity is suppressed by isoelectronic sulfur substitution. We find that in the whole nematic ($0\leq x \leq 0.17$) and tetragonal ($x=0.20$) regimes, the application of small magnetic field causes a steep increase of both quantities. This indicates the existence of deep minima or line nodes in the superconducting gap function, implying that the pairing interaction is significantly anisotropic in both the nematic and the tetragonal regimes. Moreover, the present results indicate that the position of gap minima/nodes in the tetragonal regime appears to be essentially different from that in the nematic regime. These results place an important constraint on current theories.
description: 6 pages, 4 figures
Characteristics and Energy Flux Distributions of Decayless Transverse Oscillations Depending on Coronal Regions
Creators: name: Lim, Daye
name: Van Doorsselaere, Tom
name: Berghmans, David
name: Petrova, Elena
Publisher: name: arXiv
Year: 2024
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: Lim et al. (2023) have recently proposed that the slope ($δ$) of the power law distribution between the energy flux and oscillation frequency could determine whether high-frequency transverse oscillations give a dominant contribution to the heating ($δ<1$). A meta-analysis of decayless transverse oscillations revealed that high-frequency oscillations potentially play a key role in heating the solar corona. We aim to investigate how (whether) the distributions of the energy flux contained in transverse oscillations, and their slopes, depend on the coronal region in which the oscillation occurs. We analyse transverse oscillations from 41 quiet Sun (QS) loops and 22 active region (AR) loops observed by Solar Orbiter/Extreme Ultraviolet Imager (SolO/EUI) HRIEUV. The energy flux and energy are estimated using analysed oscillation parameters and loop properties, such as periods, displacement amplitudes, loop lengths, and minor radii of the loops. It is found that about 71% of QS loops and 86% of AR loops show decayless oscillations. We find that the amplitude does not change depending on different regions, but the difference in the period is more pronounced. Although the power law slope ($δ=-1.79$) in AR is steeper than that ($δ=-1.59$) in QS, both of them are significantly less than the critical slope of 1. Our statistical study demonstrates that high-frequency transverse oscillations can heat the QS. For ARs, the total energy flux is insufficient unless yet-unobserved oscillations with frequencies up to 0.17 Hz are present. Future EUI campaigns will be planned to confirm this.
description: 14 pages, 8 figures, 3 tables, accepted for publication in A&A
ЮРТИМИЗДА ТЕРРОРИЗМ ВА ЭКСТРЕМИЗМГА ҚАРШИ КУРАШИШГА "СОХТА САЛАФИЙЛИК"НИ  ТАЪСИРИ
Creators: name: Юсупов, Сайдислом
Publisher: name: Zenodo
Year: 2024

description: 2020 йил 24 январь куни Ўзбекистон Республикаси Президенти Шавкат Мирзиёевнинг Олий Мажлисга мурожаатномасида жаҳонда шиддат билан ўзгараётган нотинч ва мураккаб вазият, турли можаролар жонажон Ватанимиз хавфсизлигини, эл-юртимизнинг осойишта ҳаётини таъминлаш ҳамда мавжуд таҳдид ва хатарларга муносиб жавоб беришга доим тайёр туришимизни тақозо этаётганлиги, мамлакатимизда“ жаҳолатга қарши –маърифат”деган эзгу ғоя асосида ислом динининг инсон парварлик моҳиятини, тинчлик ва дўстлик каби олийжаноб мақсадларга хизмат қилишини тарғиб этиш кун тартибимиздаги доимий масалалардан бири бўлиб қолади деб таъкидлаган эди[1]
A search for Galactic post-asymptotic giant branch stars in Gaia DR3
Creators: name: González-Santamaría, Iker
name: Manteiga, Minia
name: Manchado, Arturo
name: Villaver, Eva
name: Ulla, Ana
name: Dafonte, Carlos
Publisher: name: arXiv
Year: 2024
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: Context. When low and intermediate-mass stars leave the Asymptotic Giant Branch (AGB) phase, and before they reach the Planetary Nebulae stage, they enter a very brief and rather puzzling stellar evolutionary stage named post-AGB.
 Aims. To provide a reliable catalogue of galactic post-AGB stars together with their physical and evolutionary properties obtained through Gaia DR3 astrometry and photometry.
 Methods. We started by identifying post-AGB stars or possible candidates from the bibliography with their Gaia DR3 counterpart sources. Using the available photometry, interstellar extinction, literature spectroscopically derived temperatures or spectral types and parallax-derived distances from Gaia DR3, we fitted their Spectral Energy Distributions and we estimated their luminosities and circumstellar extinctions. When compared to models, luminosity values allowed us to disclose objects that are likely post-AGB stars from other target types. Their position on the HR diagram allows direct comparison with updated post-AGB evolutionary tracks and an estimation of their masses and evolutionary ages.
 Results. We obtained a sample of 69 reliable post-AGB candidates that meet our classification criteria, providing their coordinates, distances, effective temperature, total extinction, luminosity, mass, and evolutionary age. In addition, similar data for other stellar objects in our initial compilation, such as supergiant stars or young stellar objects, is provided.
 Conclusions. We have filtered out the data that have the best precision in parallaxes and distances to obtain more accurate luminosities, which allows us to classify with confidence the objects of the sample among different stellar phases. This allows us to provide a small but reliable sample of post-AGB objects. Derived mean evolutionary time and average mass values are in agreement with theoretical expectations.
Reversible temperature exchange upon thermal contact
Creators: name: Mishchenko, E. G.
name: Pshenichka, P. F.
Publisher: name: arXiv
Year: 2017
Subjects: subject: Popular Physics (physics.pop-ph)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: According to a well-known principle of thermodynamics, the transfer of heat between two bodies is reversible when their temperatures are infinitesimally close. As we demonstrate, a little-known alternative exists: two bodies with temperatures different by an arbitrary amount can completely exchange their temperatures in a reversible way if split into infinitesimal parts that are brought into thermal contact sequentially.
description: 7 pages, 9 figures
Probing the filamentary nature of star formation in the California giant molecular cloud
Creators: name: Zhang, Guo-Yin
name: Andre, Philippe
name: Menshchikov, Alexander
name: Li, Jin-Zeng
Publisher: name: arXiv
Year: 2024
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: Recent studies suggest that filamentary structures are representative of the initial conditions of star formation in molecular clouds and support a filament paradigm for star formation, potentially accounting for the origin of the stellar initial mass function (IMF). Using Herschel imaging observations of the California giant molecular cloud, we aim to further investigate the filament paradigm for low- to intermediate-mass star formation and to better understand the exact role of filaments in the origin of stellar masses. Using the multiscale, multiwavelength extraction method getsf, we identify starless cores, protostars, and filaments in the Herschel data set and separate these components from the background cloud contribution to determine accurate core and filament properties. Both the prestellar core mass function (CMF) and the distribution of filament masses per unit length or filament line mass function (FLMF) are consistent with power-law distributions at the high-mass end, $ΔN/Δ{\rm log}M\propto M^{-1.4 \pm 0.2}$ at $M > 1\,M_\odot$ for the CMF and $ΔN/Δ{\rm log} {M}_{\rm line} \propto {M}_{\rm line}^{-1.5\pm0.2}$ for the FLMF at $M_{\rm line} > 10\,M_\odot {\rm pc^{-1}}$, which are both consistent with the Salpeter power-law IMF. Based on these results, we propose a revised model for the origin of the CMF in filaments, whereby the global prestellar CMF in a molecular cloud arises from the integration of the CMFs generated by individual thermally supercritical filaments within the cloud. Our findings support the existence a tight connection between the FLMF and the CMF/IMF and suggests that filamentary structures represent a critical evolutionary step in establishing a Salpeter-like mass function.
description: 16 pages, 22 figures, accepted for publication in Astronomy & Astrophysics
Obliquities of Exoplanet Host Stars from Precise Distances and Stellar Angular Diameters
Creators: name: Quinn, Samuel N.
name: White, Russel J.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: FOS: Physical sciences

description: The next generation of exoplanet space photometry missions proposed by both NASA and ESA promise to discover small transiting planets around the nearest and brightest main-sequence stars. The physical and rotational properties of these stars, in conjunction with Gaia-precision distances, can be used to determine the inclination of the stellar rotation axis. Given edge-on orbital paths for transiting planets, stellar inclinations can be interpreted as obliquities projected into the line of sight, which can be used to more clearly reveal the system architectures of small planets and the factors that drive their orbital evolution. To demonstrate the method, we use a sample of simulated target stars for the NASA Transiting Exoplanet Survey Satellite (TESS) mission. Based on predicted characteristics of these stars and likely measurement uncertainties, we show that the expected TESS discoveries will allow us to finely differentiate the true underlying obliquity distribution. Under conservative assumptions in our illustrative example--in which the true distribution is assumed to contain systems drawn from both well-aligned and isotropic distributions (e.g., due to multiple migration channels)--the correct fractions can be determined to within $0.15$, thus enabling constraints on the evolutionary processes that shape system architectures. Moreover, because of the excellent astrometric precision expected from Gaia, this technique will also be applicable to the large number of planets already discovered by ${\textit Kepler}$ orbiting much more distant stars.
description: 16 pages, 3 figures, 1 table. Published in ApJ
The Cygnus Allscale Survey of Chemistry and Dynamical Environments: CASCADE III. The large scale distribution of DCO+, DNC and DCN in the DR21 filament
Creators: name: Christensen, I. Barlach
name: Wyrowski, F.
name: Veena, V. S.
name: Beuther, H.
name: Semenov, D.
name: Menten, K. M.
name: Jacob, A. M.
name: Kim, W. -J.
name: Cunningham, N.
name: Gieser, C.
name: Hacar, A.
name: Li, S.
name: Schneider, N.
name: Skretas, I.
name: Winters, J. M.
Publisher: name: arXiv
Year: 2024
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: Deuterated molecules and their molecular D/H-ratios (RD(D)) are important diagnostic tools to study the physical conditions of star-forming regions. The degree of deuteration, RD(D), can be significantly enhanced over the elemental D/H-ratio depending on physical parameters. Within the Cygnus Allscale Survey of Chemistry and Dynamical Environments (CASCADE), we aim to explore the large-scale distribution of deuterated molecules in the nearby Cygnus-X region. We focus on the analysis of large-scale structures of deuterated molecules in the filamentary region hosting the prominent Hii region DR21 and DR21(OH). Here we discuss the HCO+, HNC and HCN molecules and their deuterated isotopologues DCO+, DNC and DCN. The spatial distributions of integrated line emissions from DCO+, DNC, and DCN reveal morphological differences. DCO+ displays the most extended emission, characterized by several prominent peaks. Likewise, DNC exhibits multiple peaks, although its emission appears less extended compared to DCO+. In contrast to the extended emission of DCO+ and DNC, DCN appears the least extended, with distinct peaks. Focusing only on the regions where all three molecules are observed, the mean deuteration ratios for each species are 0.01 for both DNC and DCN, and = 0.005 for DCO+. Anti-correlations are found with deuterated molecules and dust temperature or N(H2). The strongest anti-correlation is found with RD(DCO+) and N(H2). The anti-correlation of RD(DCO+) and N(H2) is suggested to be a result of a combination of an increased photodissociation degree and shocks. A strong positive correlation between the ratio of integrated intensities of DCN and DNC with their 13C-isotopologues, are found in high column density regions. The positive relationship between the ratios implies that the D-isotopologue of the isomers could potentially serve as a tracer for the kinetic gas temperature.
description: 24 pages, 21 figures, accepted to A&A
Effects of reciprocity on random walks in weighted networks
Creators: name: Zhang, Zhongzhi
name: Li, Huan
name: Sheng, Yibin
Publisher: name: arXiv
Year: 2017
Subjects: subject: Social and Information Networks (cs.SI)
subject: FOS: Computer and information sciences

description: It has been recently reported that the reciprocity of real-life weighted networks is very pronounced, however its impact on dynamical processes is poorly understood. In this paper, we study random walks in a scale-free directed weighted network with a trap at the central hub node, where the weight of each directed edge is dominated by a parameter controlling the extent of network reciprocity. We derive two expressions for the mean first passage time (MFPT) to the trap, by using two different techniques, the results of which agree well with each other. We also analytically determine all the eigenvalues as well as their multiplicities for the fundamental matrix of the dynamical process, and show that the largest eigenvalue has an identical dominant scaling as that of the MFPT.We find that the weight parameter has a substantial effect on the MFPT, which behaves as a power-law function of the system size with the power exponent dependent on the parameter, signaling the crucial role of reciprocity in random walks occurring in weighted networks.
ҲУҚУҚБУЗАРЛИКЛАР ПРОФИЛАКТИКАСИДА ИЖТИМОИЙ РЕАБИЛИТАЦИЯ ҚИЛИШ ВА ИЖТИМОИЙ МОСЛАШТИРИШ ИШЛАРИНИ ТАШКИЛ ҚИЛИШНИНГ ЎЗИГА ХОС ЖИҲАТЛАРИ ВА ХОРИЖ ТАЖРИБАСИ
Creators: name: Эгамбердиев, Воҳиджон
Publisher: name: Zenodo
Year: 2024

description: Ушбу мақола ҳуқуқбузарликлар профилактикасида ижтимоий реабилитация қилиш ва ижтимоий мослаштириш ишларини ташкил қилишнинг ўзига хос жиҳатлари ва хориж тажрибасига бағишланган.
Information sur les instruments de vacarme de Jeudi Saint. Rossignols (sifflets)
Creators: name: Musée National Des Arts Et Traditions Populaires (Paris)
name: Centre D'ethnologie Française
Publisher: name: École des Hautes Études en Sciences Sociales; Institut  interdisciplinaire d'anthropologie du contemporain (Paris); Laboratoire d'anthropologie et d'histoire de l'institution de la culture (Paris)
Year: 2022

Abstract
Probing Left-Right Seesaw using Beam Polarization at an $e^+e^-$ Collider
Creators: name: Biswal, Sudhansu S.
name: Dev, P. S. Bhupal
Publisher: name: arXiv
Year: 2017
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: We show that the longitudinal beam polarization option at a future electron-positron collider provides an unambiguous distinction between low-scale seesaw models of neutrino mass. This is possible due to the fact that the pair production cross section of the heavy neutrinos in seesaw models is sensitive to the polarization of the initial lepton beams, and for a suitable choice of the polarization, shows a clear enhancement over the unpolarized cross section. More interestingly, the choice of the beam polarization for which the enhancement is maximum is governed by the size of the light-heavy neutrino mixing parameter. We also find that using this effect, one can probe a previously uncharted parameter space of the left-right seesaw model, which is complementary to the existing searches at both energy and intensity frontiers.
description: 6 pages, 3 figures
Stability of monodomain III-V crystals and antiphase boundaries over a Si monoatomic step
Creators: name: Gupta, D.
name: Chandrasekharan, S. Pallikkara
name: Thébaud, S.
name: Cornet, C.
name: Pedesseau, L.
Publisher: name: arXiv
Year: 2024
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Applied Physics (physics.app-ph)
subject: Chemical Physics (physics.chem-ph)
subject: Computational Physics (physics.comp-ph)
subject: FOS: Physical sciences

description: Here, we compare the stabilities of different III-V crystals configurations on stepped Si substrates, with or without anti-phase boundaries, for abrupt and compensated interfaces, using density functional theory. Thermodynamic stability of the different heterostructures is analyzed with an atomic scale description of charge densities distribution and mechani-cal strain. We show that the configuration where a III-V crystal adapts to a Si monoatomic step through change of charge compensation at the hetero-interface is much more stable than the configuration in which an antiphase boundary is formed. This study thus demonstrates that antiphase boundaries commonly observed in III-V/Si samples are not origi-nating from Si monoatomic step edges but from inevitable kinetically driven coalescence of monophase 3D III-V islands.
description: 8 pages, 5figures
title: Second order semi-smooth Proximal Newton methods in Hilbert spaces
Creators: name: Pötzl, Bastian
name: Schiela, Anton
name: Jaap, Patrick
Publisher: name: University of Bayreuth
Year: 2022
Subjects: subject: Non-smooth Optimization
subject: Optimization in Hilbert space
subject: Proximal Newton
subject: 510

description: We develop a globalized Proximal Newton method for composite and possibly non-convex minimization problems in Hilbert spaces. Additionally, we impose less restrictive assumptions on the composite objective functional considering differentiability and convexity than in existing theory. As far as differentiability of the smooth part of the objective function is concerned, we introduce the notion of second order semi-smoothness and discuss why it constitutes an adequate framework for our Proximal Newton method. However, both global convergence as well as local acceleration still pertain to hold in our scenario. Eventually, the convergence properties of our algorithm are displayed by solving a toy model problem in function space.
Characterizing planetary systems with SPIRou: a temperate sub-Neptune exoplanet orbiting the nearby fully-convective star GJ 1289 and a candidate around GJ 3378
Creators: name: Moutou, C.
name: Ould-Elhkim, M.
name: Donati, J. -F.
name: Charpentier, P.
name: Cadieux, C.
name: Delfosse, X.
name: Artigau, E.
name: Arnold, L.
name: Baruteau, C.
name: Carmona, A.
name: Cook, N. J.
name: Cortes-Zuleta, P.
name: Doyon, R.
name: Hebrard, G.
name: consortium, the SLS
Publisher: name: arXiv
Year: 2024
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: We report the discovery of two new exoplanet systems around fully convective stars, found from the radial-velocity (RV) variations of their host stars measured with the nIR spectropolarimeter CFHT/SPIRou over multiple years. GJ 3378 b is a planet with minimum mass of $5.26^{+0.94}_{-0.97}$ Mearth in an eccentric 24.73-day orbit around an M4V star of 0.26 Msun. GJ 1289 b has a minimum mass of $6.27\pm1.25$ Mearth in a 111.74-day orbit, in a circular orbit around an M4.5V star of mass 0.21 Msun. Both stars are in the solar neighbourhood, at respectively 7.73 and 8.86 pc. The low-amplitude RV signals are detected after line-by-line post-processing treatment. These potential sub-Neptune class planets around cool stars may have temperate atmospheres and be interesting nearby systems for further studies. We also recovered the large-scale magnetic field of both stars, found to be mostly axisymmetric and dipolar, and with a polar strength of 20-30 G and 200-240 G for GJ 3378 (in 2019-21) and GJ 1289 (in 2022-23), respectively. The rotation periods measured with the magnetic field differ from the orbital periods, and in general, stellar activity is not seen in the studied nIR RV time series of both stars. GJ 3378 b detection is not confirmed by optical RVs and is therefore considered a candidate at this point.
description: accepted in A&A
High-$p_T$ dilepton tails and flavour physics
Creators: name: Greljo, Admir
name: Marzocca, David
Publisher: name: arXiv
Year: 2017
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: We investigate the impact of flavour-conserving, non-universal quark-lepton contact interactions on the dilepton invariant mass distribution in $p~p \to \ell^+ \ell^-$ processes at the LHC. After recasting the recent ATLAS search performed at 13 TeV with 36.1 fb$^{-1}$ of data, we derive the best up-to-date limits on the full set of 36 relevant four-fermion operators, as well as estimate the sensitivity achievable at the HL-LHC. We discuss how these high-$p_T$ measurements can provide complementary information to the low-$p_T$ rare meson decays. In particular, we find that the recent hints on lepton flavour universality violation in $b \to s μ^+ μ^-$ transitions are already in mild tension with the dimuon spectrum at high-$p_T$ if the flavour structure follows minimal flavour violation. Even if the mass scale of New Physics is well beyond the kinematical reach for on-shell production, the signal in the high-$p_T$ dilepton tail might still be observed, a fact that has been often overlooked in the present literature. In scenarios where new physics couples predominantly to third generation quarks, instead, the HL-LHC phase is necessary in order to provide valuable information.
description: 9 pages, 5 figures, 1 table
Spatially and time-resolved imaging of transport of indirect excitons in high magnetic fields
Creators: name: Dorow, C. J.
name: Hasling, M. W.
name: Calman, E. V.
name: Butov, L. V.
name: Wilkes, J.
name: Campman, K. L.
name: Gossard, A. C.
Publisher: name: arXiv
Year: 2017
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: We present the direct measurements of magnetoexciton transport. Excitons give the opportunity to realize the high magnetic field regime for composite bosons with magnetic fields of a few Tesla. Long lifetimes of indirect excitons allow the study kinetics of magnetoexciton transport with time-resolved optical imaging of exciton photoluminescence. We performed spatially, spectrally, and time-resolved optical imaging of transport of indirect excitons in high magnetic fields. We observed that increasing magnetic field slows down magnetoexciton transport. The time-resolved measurements of the magnetoexciton transport distance allowed for an experimental estimation of the magnetoexciton diffusion coefficient. An enhancement of the exciton photoluminescence energy at the laser excitation spot was found to anti-correlate with the exciton transport distance. A theoretical model of indirect magnetoexciton transport is presented and is in agreement with the experimental data.
Effects of non-commutative geometry on black hole properties
Creators: name: Filho, A. A. Araújo
name: Nascimento, J. R.
name: Petrov, A. Yu.
name: Porfírio, P. J.
name: Övgün, Ali
Publisher: name: arXiv
Year: 2024
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: In this study, we investigate the signatures of a non-commutative black hole solution. Initially, we calculate the thermodynamic properties of the system, including entropy, heat capacity, and Hawking radiation. For the latter quantity, we employ two distinct methods: surface gravity and the topological approach. Additionally, we examine the emission rate and remnant mass within this context. Remarkably, the lifetime of the black hole, after reaching its final state due to the evaporation process, is expressed analytically up to a grey-body factor. We estimate the lifetime for specific initial and final mass configurations. Also, we analyze the tensorial quasinormal modes using the 6th-order WKB method. Finally, we study the deflection angle, i.e., gravitational lensing, in both the weak and strong deflection limits.
description: 27 pages, 13 figures and 4 tables
ОСОБЕННОСТИ АНТРОПОМЕТРИЧЕСКИЕ ПОКАЗАТЕЛИ У ДЕТЕЙ ОТ ТРЕХ ДО ШЕСТИ ЛЕТНОГО ВОЗРАСТА.
Creators: name: Миршарапов, Уткур
name: Ахмедова, Сайёра
name: Шерманов, Абдували
Publisher: name: Zenodo
Year: 2024

description: Дети раннего возраста характеризуются быстрыми темпами физического и нервно-психического развития; низкой устойчивостью к окружающей среде по сравнению с детьми старшего возраста. В 2019-2022 годах было проведено антропометрическое исследование 210 детей обоего пола в возрасте до 6 лет из государственных детских садов Ташкента. Были измерены рост и вес.
Pricing objectivity: How collectors weigh objective features in pricing art
Creators: name: Yap, Helen
Publisher: name: University of Chicago
Year: 2023

description: How is art valued? How do art collectors understand art and price pieces in the art market? These are long standing research questions that have been limited by data availability and by the clandestine nature of art markets. Drawing upon anthropology, economics, and sociology, the study grapples with the elusiveness of art valuation processes and tests whether these objective factors significantly affect the price-setting behavior of art collectors. By leveraging data-rich blockchain ecosystems, the paper illuminates the intricacies of valuation in the art market and serves as a first study in a longer research agenda on art market exchange and valuation processes. The inaugural sale prices of 2,553 from the same collection of art is evaluated against objective features. Results from an ordinary least squares regression model show that objective values cannot sufficiently explain how collectors decide on art prices. Instead, continued academic exploration into the social and subjective values of art is required.
Ariel stellar characterisation II. Chemical abundances of carbon, nitrogen, and oxygen for 181 planet-host FGK dwarf stars
Creators: name: da Silva, R.
name: Danielski, C.
name: Mena, E. Delgado
name: Magrini, L.
name: Turrini, D.
name: Biazzo, K.
name: Tsantaki, M.
name: Rainer, M.
name: Helminiak, K. G.
name: Benatti, S.
name: Adibekyan, V.
name: Sanna, N.
name: Sousa, S.
name: Casali, G.
name: Van der Swaelmen, M.
Publisher: name: arXiv
Year: 2024
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: One of the ultimate goals of the ESA Ariel space mission is to shed light on the formation pathways and evolution of planetary systems in the Solar neighbourhood. Such an endeavour is only possible by performing a large chemical survey of not only the planets, but also their host stars, inasmuch as stellar elemental abundances are the cipher key to decode the planetary compositional signatures. This work aims at providing homogeneous abundances of C, N, and O of a sample of 181 stars belonging to the Tier 1 of the Ariel Mission Candidate Sample. We applied the spectral synthesis and the equivalent width methods to a variety of atomic and molecular indicators (C I lines at 5052 and 5380.3 A, [O I] forbidden line at 6300.3 A, C_2 bands at 5128 and 5165 A, and CN band at 4215 A) using high-resolution and high S/N spectra collected with several spectrographs. We provide carbon abundances for 180 stars, nitrogen abundances for 105 stars, and oxygen abundances for 89 stars. We analyse the results in the light of the Galactic chemical evolution, and in terms of the planetary companions properties. Our sample basically follows the typical trends with metallicity expected for the [C/Fe], [N/Fe], and [O/Fe] abundance ratios. The fraction between C and O abundances, both yields of primary production, is consistent with a constant ratio as [O/H] increases, whereas the abundance of N tends to increase with the increasing of the O abundance, supporting the theoretical assumption of a secondary production of nitrogen. The [C/N], [C/O], and [N/O] ratios are also correlated with [Fe/H], which might introduce biases in the interpretation of the planetary compositions and formation histories if host stars of different metallicity are compared. We provide relations that can be used to qualitatively estimate whether the atmospheric composition of planets is enriched or not with respect to the host stars.
description: 20 pages, 15 figures, 2 tables, to be published in the Astronomy & Astrophysics journal
Bright soliton dynamics in Spin Orbit-Rabi coupled Bose-Einstein condensates
Creators: name: Vinayagam, P. S.
name: Radha, R.
name: Bhuvaneswari, S.
name: Ravisankar, R.
name: Muruganandam, P.
Publisher: name: arXiv
Year: 2017
Subjects: subject: Quantum Gases (cond-mat.quant-gas)
subject: Other Condensed Matter (cond-mat.other)
subject: FOS: Physical sciences
subject: 37K40, 35Q51, 35Q55

description: We investigate the dynamics of a spin-orbit (SO) coupled BECs in a time dependent harmonic trap and show the dynamical system to be completely integrable by constructing the Lax pair. We then employ gauge transformation approach to witness the rapid oscillations of the condensates for a relatively smaller value of SO coupling in a time independent harmonic trap compared to their counterparts in a transient trap. Keeping track of the evolution of the condensates in a transient trap during its transition from confining to expulsive trap, we notice that they collapse in the expulsive trap. We further show that one can manipulate the scattering length through Feshbach resonance to stretch the lifetime of the confining trap and revive the condensate. Considering a SO coupled state as the initial state, the numerical simulation indicates that the reinforcement of Rabi coupling on SO coupled BECs generates the striped phase of the bright solitons and does not impact the stability of the condensates despite destroying the integrability of the dynamical system.
description: 11 pages, 9 figures
A dual-trap system for the study of charged rotating graphene nanoplatelets in high vacuum
Creators: name: Coppock, Joyce E.
name: Nagornykh, Pavel
name: Murphy, Jacob P. J.
name: McAdams, I. S.
name: Katragadda, Saimouli
name: Kane, B. E.
Publisher: name: arXiv
Year: 2017
Subjects: subject: Instrumentation and Detectors (physics.ins-det)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We discuss the design and implementation of a system for generating charged multilayer graphene nanoplatelets and introducing a nanoplatelet into a quadrupole ion trap in high vacuum. Levitation decouples the platelet from its environment and enables sensitive mechanical and magnetic measurements. The platelets are generated via liquid exfoliation of graphite pellets and charged via electrospray ionization. A single platelet is trapped at a pressure of several hundred millitorr and transferred to a trap in a second chamber, which is pumped to UHV pressures for further study.
СРАВНИТЕЛЬНЫЕ АНТРОПОМЕТРИЧЕСКИЕ ПАРАМЕТРЫ ДЕТЕЙ ДОШКОЛЬНОГО ВОЗРАСТА (3-6 ЛЕТ) В ГОРОДЕ ТАШКЕНТЕ.
Creators: name: Миршарапов, Уткур
name: Ахмедова, Сайёра
name: Шерманов, Абдували
Publisher: name: Zenodo
Year: 2024

description: Физическое развитие - уникальный показатель здоровья, на котором удается проследить как эпохальные изменения биологической природы, так и сравнительно кратковременные эффекты в отношении популяционной совокупности, отражает статус фактического питания детей. Окружность грудной клетки является основным антропометрическим показателем, который используется для оценки здорового физического развития детей в эпидемиологических исследованиях.
Why quantum correlations are shocking
Creators: name: Hall, Michael J. W.
Publisher: name: arXiv
Year: 2024
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: A simple minimalist argument is given for why some correlations between quantum systems boggle our classical intuition. The argument relies on two elementary physical assumptions, and recovers the standard experimentally-testable Bell inequality in a form that applies equally well to correlations between six-sided dice and between photon polarizations. The first assumption, that measurement selection in a first lab leaves the measurement statistics in a remote lab invariant (no-signaling), has been empirically verified, and is shown to be equivalent to the existence of a corresponding joint probability distribution for quantities measured in the first lab. The observed violation of the Bell inequality is then equivalent to the failure of a second assumption, that measurement selection in the remote lab leaves such a joint distribution invariant. Indeed, the degree of violation lower-bounds the variation of the joint distribution. It directly follows there are just three possible physical mechanisms underlying such violations -- action-at-a-distance (superluminality), unavoidable common factors linking measurement choice and distant properties (conspiracy), and intrinsically incompatible physical quantities (complementarity). The argument extends to all Bell inequalities, and is briefly compared with other derivations.
description: 10 pages, 1 figure (accepted version, with minor clarifications)
The Blue Multi Unit Spectroscopic Explorer (BlueMUSE) on the VLT: science drivers and overview of instrument design
Creators: name: Richard, Johan
name: Giroud, Rémi
name: Laurent, Florence
name: Krajnović, Davor
name: Jeanneau, Alexandre
name: Bacon, Roland
name: Abreu, Manuel
name: Adamo, Angela
name: Araujo, Ricardo
name: Bouché, Nicolas
name: Brinchmann, Jarle
name: Cai, Zhemin
name: Castro, Norberto
name: Calcines, Ariadna
name: Chapuis, Diane
name: Claeyssens, Adélaïde
name: Cortese, Luca
name: Daddi, Emanuele
name: Davison, Christopher
name: Goodwin, Michael
name: Harris, Robert
name: Hayes, Matthew
name: Jauzac, Mathilde
name: Kelz, Andreas
name: Kneib, Jean-Paul
name: Lanotte, Audrey A.
name: Lawrence, Jon
name: Bouteiller, Vianney Le
name: Breton, Rémy Le
name: Lehnert, Matthew
name: Sanchez, Angel Lopez
name: McGregor, Helen
name: McLeod, Anna F.
name: Monteiro, Manuel
name: Morris, Simon
name: Opitom, Cyrielle
name: Pécontal, Arlette
name: Robertson, David
name: Roth, Martin M.
name: van de Sande, Jesse
name: Smith, Russell
name: Steinmetz, Matthias
name: Swinbank, Mark
name: Urrutia, Tanya
name: Verhamme, Anne
name: Weilbacher, Peter M.
name: Wendt, Martin
name: Wildi, François
name: Zheng, Jessica
name: consortium, The BlueMUSE
Publisher: name: arXiv
Year: 2024
Subjects: subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: BlueMUSE is a blue-optimised, medium spectral resolution, panoramic integral field spectrograph under development for the Very Large Telescope (VLT). With an optimised transmission down to 350 nm, spectral resolution of R$\sim$3500 on average across the wavelength range, and a large FoV (1 arcmin$^2$), BlueMUSE will open up a new range of galactic and extragalactic science cases facilitated by its specific capabilities. The BlueMUSE consortium includes 9 institutes located in 7 countries and is led by the Centre de Recherche Astrophysique de Lyon (CRAL). The BlueMUSE project development is currently in Phase A, with an expected first light at the VLT in 2031. We introduce here the Top Level Requirements (TLRs) derived from the main science cases, and then present an overview of the BlueMUSE system and its subsystems fulfilling these TLRs. We specifically emphasize the tradeoffs that are made and the key distinctions compared to the MUSE instrument, upon which the system architecture is built.
description: 20 pages, 10 figures, proceedings of the SPIE astronomical telescopes and instrumentation conference, Yokohama, 16-21 June
SCIENTIFIC AND METHODOLOGICAL BASES OF ORGANIZING SPIRITUAL AND EDUCATIONAL WORK IN EDUCATIONAL INSTITUTIONS IN THE CONDITIONS OF GLOBALIZATION.
Creators: name: Egamberdiyev, Javlonbek
Publisher: name: Zenodo
Year: 2024

description: This article contains thoughts and opinions on the organization of spiritual and educational work in educational institutions. Information is given about achievements, shortcomings, problems and their solutions in the field of spiritual and educational work in educational institutions in Uzbekistan, educational processes in organized events.
Hadron detection with a dual-readout fiber calorimeter
Creators: name: Lee, S.
name: Cardini, A.
name: Cascella, M.
name: Choi, S.
name: Ciapetti, G.
name: Ferrari, R.
name: Franchino, S.
name: Fraternali, M.
name: Gaudio, G.
name: Ha, S.
name: Hauptman, J.
name: Kim, H.
name: Lanza, A.
name: Li, F.
name: Livan, M.
name: Meoni, E.
name: Park, J.
name: Scuri, F.
name: Sill, A.
name: Wigmans, R.
Publisher: name: arXiv
Year: 2017
Subjects: subject: Instrumentation and Detectors (physics.ins-det)
subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: In this paper, we describe measurements of the response functions of a fiber-based dual- readout calorimeter for pions, protons and multiparticle "jets" with energies in the range from 10 to 180 GeV. The calorimeter uses lead as absorber material and has a total mass of 1350 kg. It is complemented by leakage counters made of scintillating plastic, with a total mass of 500 kg. The effects of these leakage counters on the calorimeter performance are studied as well. In a separate section, we investigate and compare different methods to measure the energy resolution of a calorimeter. Using only the signals provided by the calorimeter, we demonstrate that our dual-readout calorimeter, calibrated with electrons, is able to reconstruct the energy of proton and pion beam particles to within a few percent at all energies. The fractional widths of the signal distributions for these particles (sigma/E) scale with the beam energy as 30%/sqrt(E), without any additional contributing terms.