cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Theoretical Evaluation of Li et al.'s Approach for Improving a Binary Watermark-Based Scheme in Remote Sensing Data Communications
Creators: name: Khosravi, Mohammad Reza
name: Moghimi, Mohammad Kazem
Publisher: name: arXiv
Year: 2017
Subjects: subject: Multimedia (cs.MM)
subject: FOS: Computer and information sciences

description: This letter is about a principal weakness of the published article by Li et al. in 2014. It seems that the mentioned work has a terrible conceptual mistake while presenting its theoretical approach. In fact, the work has tried to design a new attack and its effective solution for a basic watermarking algorithm by Zhu et al. published in 2013, however in practice, we show the Li et al.'s approach is not correct to obtain the aim. For disproof of the incorrect approach, we only apply a numerical example as the counterexample of the Li et al.'s approach.
Demystifying Arrow of Time
Creators: name: Kakushadze, Zura
Publisher: name: arXiv
Year: 2024
Subjects: subject: Popular Physics (physics.pop-ph)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Theory (hep-th)
subject: Classical Physics (physics.class-ph)
subject: FOS: Physical sciences

description: Scientific discussions of the arrow of time often get quite confusing due to highly complex systems they deal with. Popular literature then often coveys messages that tend to get lost in translation. The purpose of this note is to demystify the arrow of time by stripping off the unnecessary complexities and thereby simplifying the discussion. We do this by providing examples that are exactly solvable and make it easy to see the root cause of the apparent "time-irreversibility". We also discuss "time-reversal" solutions, where the initial state evolves such that it reaches the state which is the same as the initial state moving backward in time. These solutions are simple enough to be comprehensible to a highschooler. We discuss the arrow of time both in the classical and quantum settings, including in the cosmological context.
description: 23 pages; to appear in Nano Studies, Issue 23/24
DESCRIPTION OF FACTORS AFFECTING THE DEVELOPMENT OF HERMENEUTIC COMPETENCE OF FUTURE MUSIC EDUCATION TEACHERS
Creators: name: Djalilova, Dilnozakhan
Publisher: name: Zenodo
Year: 2024

description: In the article, the factors affecting the development of hermeneutic competence of future music education teachers and their influence on the pedagogical process are thoroughly analyzed. Also, its necessity and pedagogical relevance today, priority tasks in preparing teachers for the process of hermeneutic competence development are highlighted.
Fractional Herglotz variational problems of variable order
Creators: name: Tavares, Dina
name: Almeida, Ricardo
name: Torres, Delfim F. M.
Publisher: name: arXiv
Year: 2017
Subjects: subject: Optimization and Control (math.OC)
subject: FOS: Mathematics
subject: 26A33, 34A08, 49K05, 49K10

description: We study fractional variational problems of Herglotz type of variable order. Necessary optimality conditions, described by fractional differential equations depending on a combined Caputo fractional derivative of variable order, are proved. Two different cases are considered: the fundamental problem, with one independent variable, and the general case, with several independent variables. We end with some illustrative examples of the results of the paper.
description: This is a preprint of a paper whose final and definite form is with 'Discrete and Continuous Dynamical Systems -- Series S' (DCDS-S), ISSN 1937-1632 (print), ISSN 1937-1179 (online), available at [https://www.aimsciences.org/journals/home.jsp?journalID=15]. Paper Submitted 30-July-2016; Revised 03-Feb-2017; Accepted 27-March-2017
High-Redshift Merger Model for Low-Frequency Gravitational Wave Background
Creators: name: Wu, Zhao-Feng
name: Giannios, Dimitrios
Publisher: name: arXiv
Year: 2024
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: In 2023, the Pulsar Timing Array (PTA) Collaborations announced the discovery of a gravitational wave background (GWB), predominantly attributed to supermassive black hole binary (SMBHB) mergers. However, the detected GWB is several times stronger than the default value expected from galactic observations at low and moderate redshifts. Recent findings by the James Webb Space Telescope (JWST) have unveiled a substantial number of massive, high-redshift galaxies, suggesting more massive SMBHB mergers at these early epochs. Motivated by these findings, we propose an "early merger" model that complements the standard merger statistics by incorporating these early, massive galaxies. We compare the early and standard "late merger" models, which assume peak merger rates in the local Universe, and match both merger models to the currently detected GWB. Our analysis shows that the early merger model has a significantly lower detection probability for single binaries and predicts a ~30% likelihood that the first detectable single source will be highly redshifted and remarkably massive with rapid frequency evolution. In contrast, the late merger model predicts a nearly monochromatic first source at low redshift. The future confirmation of an enhanced population of massive high-redshift galaxies and the detection of fast-evolving binaries would strongly support the early merger model, offering significant insights into the evolution of galaxies and SMBHs.
description: 18 pages, 10 figures. Published in ApJ
On the discrepancy between asteroseismic and Gaia DR1 TGAS parallaxes
Creators: name: Gontcharov, George
name: Mosenkov, Aleksandr
Publisher: name: arXiv
Year: 2017
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: Recently, a deviation of the Gaia TGAS parallaxes from the asteroseismic ones for giants was found. We show that for parallaxes $\varpi<1.5$ mas it can be explained by a selection effect in favour of bright and luminous giants in the Tycho-2 and TGAS catalogues. Another explanation of this deviation seems to be valid for $\varpi>1.5$ mas based on the best extinction estimates: the deviation may be caused not by a bias of parallax, but by an underestimation of the extinction (and, consequently, an overestimation of the calculated absolute magnitude) in the asteroseismic results. We demonstrate that the reliable estimates of the reddening and extinction (about 0.22 mag of the visual extinction for the Kepler field) better fit both the giants and main sequence stars to the PARSEC, MIST and YaPSI isochrones.
description: 5 pages, 4 figures, MNRAS Letters
Temporal and Periodic Variations of Sunspot Counts in Flaring and Non-flaring Active Regions
Creators: name: Kilcik, A.
name: Yurchyshyn, V.
name: Donmez, B.
name: Obridko, V. N.
name: Ozguc, A.
name: Rozelot, J. P.
Publisher: name: arXiv
Year: 2017
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: We analyzed temporal and periodic behavior of sunspot counts (SSCs) in flaring (C, M, or X class flares), and non-flaring active regions (ARs) for the almost two solar cycles (1996 through 2016). Our main findings are as follows: i) The temporal variation of monthly means of daily total SSCs in flaring and non-flaring ARs are different and these differences are also varying from cycle to cycle; temporal profile of non-flaring ARs are wider than the flaring ones during the solar cycle 23, while they are almost the same during the current cycle 24. The second peak (second maximum) of flaring ARs are strongly dominate during current cycle 24, while this difference is not such a remarkable during cycle 23. The amplitude of SSCs in the non-flaring ARs are comparable during the first and second peaks (maxima) of the current solar cycle, while the first peak is almost not existent in case of the flaring ARs. ii) Periodic variations observed in SSCs of flaring and non-flaring ARs are quite different in both MTM spectrum and wavelet scalograms and these variations are also different from one cycle to another; the largest detected period in the flaring ARs is 113 days, while there are much higher periodicities (327, 312, and 256 days) in non-flaring ARs. There are no meaningful periodicities in MTM spectrum of flaring ARs exceeding 45 days during solar cycle 24, while a 113 days periodicity detected from flaring ARs of solar cycle 23. For the non-flaring ARs the largest period is 72 days during solar cycle 24, while the largest period is 327 days during current cycle.
description: Submitted to Solar Physics, 17 pages, 5 figures
Multi-qubit Lattice Surgery Scheduling
Creators: name: Silva, Allyson
name: Zhang, Xiangyi
name: Webb, Zak
name: Kramer, Mia
name: Yang, Chan Woo
name: Liu, Xiao
name: Lemieux, Jessica
name: Chen, Ka-Wai
name: Scherer, Artur
name: Ronagh, Pooya
Publisher: name: arXiv
Year: 2024
Subjects: subject: Quantum Physics (quant-ph)
subject: Hardware Architecture (cs.AR)
subject: Optimization and Control (math.OC)
subject: FOS: Physical sciences
subject: FOS: Computer and information sciences
subject: FOS: Mathematics

description: Fault-tolerant quantum computation using two-dimensional topological quantum error correcting codes can benefit from multi-qubit long-range operations. By using simple commutation rules, a quantum circuit can be transpiled into a sequence of solely non-Clifford multi-qubit gates. Prior work on fault-tolerant compilation avoids optimal scheduling of such gates since they reduce the parallelizability of the circuit. We observe that the reduced parallelization potential is outweighed by the significant reduction in the number of gates. We therefore devise a method for scheduling multi-qubit lattice surgery using an earliest-available-first policy, solving the associated forest packing problem using a representation of the multi-qubit gates as Steiner trees. Our extensive testing on random and application-inspired circuits demonstrates the method's scalability and performance. We show that the transpilation significantly reduces the circuit length on the set of circuits tested, and that the resulting circuit of multi-qubit gates has a further reduction in the expected circuit execution time compared to serial execution.
description: 23 pages, 7 figures, 4 tables
Planar magnetic structures in coronal mass ejection-driven sheath regions
Creators: name: Palmerio, Erika
name: Kilpua, Emilia K. J.
name: Savani, Neel P.
Publisher: name: arXiv
Year: 2017
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: Space Physics (physics.space-ph)
subject: FOS: Physical sciences

description: Planar magnetic structures (PMSs) are periods in the solar wind during which interplanetary magnetic field vectors are nearly parallel to a single plane. One of the specific regions where PMSs have been reported are coronal mass ejection (CME)-driven sheaths. We use here an automated method to identify PMSs in 95 CME sheath regions observed in-situ by the Wind and ACE spacecraft between 1997 and 2015. The occurrence and location of the PMSs are related to various shock, sheath and CME properties. We find that PMSs are ubiquitous in CME sheaths; 85% of the studied sheath regions had PMSs with the mean duration of 6.0 hours. In about one-third of the cases the magnetic field vectors followed a single PMS plane that covered a significant part (at least 67%) of the sheath region. Our analysis gives strong support for two suggested PMS formation mechanisms: the amplification and alignment of solar wind discontinuities near the CME-driven shock and the draping of the magnetic field lines around the CME ejecta. For example, we found that the shock and PMS plane normals generally coincided for the events where the PMSs occurred near the shock (68% of the PMS plane normals near the shock were separated by less than 20° from the shock normal), while deviations were clearly larger when PMSs occurred close to the ejecta leading edge. In addition, PMSs near the shock were generally associated with lower upstream plasma beta than the cases where PMSs occurred near the leading edge of the CME. We also demonstrate that the planar parts of the sheath contain a higher amount of strongly southward magnetic field than the non-planar parts, suggesting that planar sheaths are more likely to drive magnetospheric activity.
description: 10 pages, 7 figures, accepted for publication in Annales Geophysicae
Emergent inhomogeneity and non-locality in a graphene field-effect transistor on a near-parallel moire superlattice of transition metal dichalcogenides
Creators: name: Sett, Shaili
name: Debnath, Rahul
name: Singha, Arup
name: Mandal, Shinjan
name: K, Jyothsna
name: Bhakar, Monika
name: Watanabe, Kenji
name: Taniguchi, Takashi
name: Raghunathan, Varun
name: Sheet, Goutam
name: Jain, Manish
name: Ghosh, Arindam
Publisher: name: arXiv
Year: 2024
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: At near-parallel orientation, twisted bilayer of transition metal dichalcogenides exhibit inter-layer charge transfer-driven out-of-plane ferroelectricity that may lead to unique electronic device architectures. Here we report detailed electrical transport in a dual-gated graphene field-effect transistor placed on 3R stacked twisted bilayer of WSe2 at a twist angle of 2.1 degree. We observe hysteretic transfer characteristics and an emergent charge inhomogeneity with multiple local Dirac points as the electric displacement field (D) is increased. Concomitantly, we also observe a strong non-local voltage signal at D = 0 V/nm that decreases rapidly with increasing D. A linear scaling of the non-local signal with longitudinal resistance suggests edge mode transport, which we attribute to the breaking of valley symmetry of the graphene channel due to the spatially fluctuating electric field from the moire domains of the underlying twisted WSe2. A quantitative analysis connecting the non-locality and channel inhomogeneity suggests emergence of finite-size domains in the graphene channel that modulate the charge and the valley currents simultaneously. This work underlines efficient control and impact of interfacial ferroelectricity that can trigger a new genre of devices for twistronic applications.
description: 16 pages, 15 figures
Automated Real-World Sustainability Data Generation from Images of Buildings
Creators: name: Bentley, Peter J
name: Lim, Soo Ling
name: Mathur, Rajat
name: Narang, Sid
Publisher: name: arXiv
Year: 2024
Subjects: subject: Artificial Intelligence (cs.AI)
subject: Computer Vision and Pattern Recognition (cs.CV)
subject: FOS: Computer and information sciences
subject: 68T07, 94A08

description: When data on building features is unavailable, the task of determining how to improve that building in terms of carbon emissions becomes infeasible. We show that from only a set of images, a Large Language Model with appropriate prompt engineering and domain knowledge can successfully estimate a range of building features relevant for sustainability calculations. We compare our novel image-to-data method with a ground truth comprising real building data for 47 apartments and achieve accuracy better than a human performing the same task. We also demonstrate that the method can generate tailored recommendations to the owner on how best to improve their properties and discuss methods to scale the approach.
description: 6 pages
THE MODERATING EFFECT OF ORGANIZATIONAL FLEXIBILITY ON  THE RELATIONSHIP BETWEEN TALENT MANAGEMENT AND JOB  SATISFACTION: EMPIRICAL EVIDENCE FROM AN OIL EXPLORATION COMPANY
Creators: name: Dr. AMINA OMRANE
name: MUSTAFA SALAH GUMER
Publisher: name: Zenodo
Year: 2023
Subjects: Talent Management, Job Satisfaction, Organizational Flexibility, Employee Well-Being, Oil and Gas Industry Company.

description: Abstract

This paper intends to examine the possible relationships between talent management, job satisfaction; as well as and to test the mediating influence of organizational flexibility. In other words, it aims to investigate the extent to which talent management practices affect job satisfaction; while considering the moderating role of organizational flexibility. On the basis of a quantitative research approach, data were collected from a diverse sample of 156 employees in an oil exploration company, located in Iraq. The Partial Least Square-Structural Equation Modeling (PLS-SEM) findings of the study reveal the existence of a significant positive association between talent management and job satisfaction, indicating that effective talent management strategies contribute to enhanced levels of employee satisfaction. Moreover, the present research uncovers the pivotal moderating role of organizational flexibility, depicting that a flexible organizational magnifies the positive effects of talent management on job satisfaction. The implications of this research are therefore twofold. For academia, it might contribute to the existing body of knowledge by offering insights into the interplay among talent management, job satisfaction, and organizational flexibility. The study’s originality lies in its comprehensive examination of these interrelationships, by shedding the light on the dynamics that contribute to employees’ well-being and organizational success. For practitioners, the findings of this study emphasize the significance of strategic talent management practices in fostering the motivation and joy of the workforce. Besides, recognizing the role of organizational flexibility can guide the creation of an adaptive workplace that amplify the benefits of talent management practices. Academically, this study contributes to the existing body of knowledge by offering insights into the intricate interplay among talent management, job satisfaction, and organizational flexibility. In other words, the study’s originality lies in testing these possible interrelationships, by considering the dynamics that contribute to employees’ well-being and organizational success.
Analysis of the Amplitude of the Sunyaev-Zel'dovich Effect out to Redshift z=0.8
Creators: name: Lopez-Corredoira, M.
name: Gutierrez, C. M.
name: Genova-Santos, R. T.
Publisher: name: arXiv
Year: 2017
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: The interaction of the cosmic microwave background (CMB) with the hot gas in clusters of galaxies, the so-called Sunyaev--Zel'dovich (SZ) effect, is a very useful tool that allows us to determine the physical conditions in such clusters and fundamental parameters of the cosmological models. In this work, we determine the dependence of the the SZ surface brightness amplitude with redshift and mass of the clusters. We have used PLANCK+IRAS data in the microwave-far infrared and a catalog with >10^5 clusters of galaxies extracted from the SDSS by Wen et al. (2012). We estimate and subtract the dust emission from those clusters. From the residual flux, we extract its SZ flux densities. The absolute value of the SZ amplitude indicates that the gas mass is around 10% of the total mass for cluster masses of M~10^{14} M_sun. This amplitude is compatible with no evolution with redshift and proportional to M^{2.70+/-0.37} (using X-ray derived masses) or M^{2.51+/-0.38} (using weak-lensing derived masses), with some tension regarding the expectations of the self-similar dependence (amplitude proportional to M^{5/3}). Other secondary products of our analysis include that clusters have a dust emission with emissivity index beta~2 and temperature T~25 K; we confirm that the CMB temperature agrees with a dependence of T_0(1+z) with clusters of much lower mass than those explored previously; and we find that the cluster masses derived by Wen et al. (2012) from a richness-mass relationship are biased by a factor of (1+z)^{-1.8} with respect to the X-ray and weak-lensing measurements.
description: 15 pages, accepted to be published in ApJ
Past activity of Sgr A* is unlikely to affect the local cosmic-ray spectrum up to the TeV regime
Creators: name: Fournier, Martin
name: Fensch, Jérémy
name: Commerçon, Benoît
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: The presence of kiloparsec-sized bubble structures in both sides of the Galactic plan suggests active phases of Sgr A$^\star$, the central supermassive black hole of the Milky-Way in the last 1-6 Myr. The contribution of such event on the cosmic-ray flux measured in the solar neighborhood is investigated with numerical simulations. We evaluate whether the population of high-energy charged particles emitted by the Galactic Center could be sufficient to significantly impact the CR flux measured in the solar neighborhood. We present a set of 3D magnetohydrodynamical simulations, following the anisotropic propagation of CR in a Milky - Way like Galaxy. Independent populations of cosmic-ray are followed through time, originating from two different sources types, namely Supernovae and the Galactic Center. To assess the evolution of the CR flux spectrum properties, we split these populations into two independent energy groups of 100 GeV and 10 TeV. We find that the anisotropic nature of cosmic-ray diffusion dramatically affects the amount of cosmic-ray energy received in the solar neighborhood. Typical timescale to observe measurable changes in the CR spectrum slope is of the order 10 Myr, largely surpassing estimated ages of the Fermi bubbles in the AGN jet-driven scenario. We conclude that a cosmic-ray outburst from the Galactic center in the last few Myr is unlikely to produce any observable feature in the local CR spectrum in the TeV regime within times consistent with current estimates of the Fermi bubbles ages.
description: 9 pages, 10 figures, Accepted for publication in Astronomy & Astrophysics
A multi-epoch kinematic study of the remote dwarf spheroidal galaxy Leo II
Creators: name: Spencer, Meghin
name: Mateo, Mario
name: Walker, Matthew
name: Olszewski, Edward
Publisher: name: arXiv
Year: 2017
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We conducted a large spectroscopic survey of 336 red giants in the direction of the Leo II dwarf galaxy using Hectochelle on the MMT, and conclude that 175 of them are members based on their radial velocities and surface gravities. Of this set, 40 stars have never before been spectroscopically observed. The systemic velocity of the dwarf is 78.3+-0.6 km/s with a velocity dispersion of 7.4+-0.4 km/s . We identify one star beyond the tidal radius of Leo II but find no signatures of uniform rotation, kinematic asymmetries, or streams. The stars show a strong metallicity gradient of -1.53+-0.10 dex/kpc and have a mean metallicity of -1.70+-0.02 dex. There is also evidence of two different chemodynamic populations, but the signal is weak. A larger sample of stars would be necessary to verify this feature.
description: 12 pages, 14 figures, 3 tables. Published in ApJ
Knights are 24/13 times faster than the king
Creators: name: Táfula, Christian
Publisher: name: arXiv
Year: 2024
Subjects: subject: Combinatorics (math.CO)
subject: FOS: Mathematics
subject: 11B13, 11B75

description: On an infinite chess board, how much faster can the knight reach a square when compared to the king, in average? More generally, for coprime $b>a \in \mathbb{Z}_{\geq 1}$ such that $a+b$ is odd, define the $(a,b)$-knight and the king as
 \begin{equation*}
 \begin{aligned}
 \mathrm{N}_{a,b} = \{(a,b), (b,a), (-a,b), (-b,a), (-b,-a), (-a,-b), (a,-b), (b, -a)\},\newline
 \mathrm{K}=\{(1,0), (1,1), (0,1), (-1,1), (-1,0), (-1,-1), (0,-1), (1,-1)\} \subseteq \mathbb{Z}^2,
 \end{aligned}
 \end{equation*}
 respectively. One way to formulate this question is by asking for the average ratio, for $\mathbf{p}\in \mathbb{Z}^2$ in a box, between $\min\{h\in \mathbb{Z}_{\geq 1} ~|~ \mathbf{p}\in h\mathrm{N}\}$ and $\min\{h\in \mathbb{Z}_{\geq 1} ~|~ \mathbf{p}\in h\mathrm{K}\}$, where $hA = \{\mathbf{a}_1+\cdots+\mathbf{a}_h ~|~ \mathbf{a}_1,\ldots, \mathbf{a}_h \in A\}$ is the $h$-fold sumset of $A$. We show that this ratio equals $2(a+b)b^2/(a^2+3b^2)$.
description: 7 pages, 2 figures. Fixed typos
THE ESSENCE OF THE DEVELOPMENT OF HERMENEUTIC COMPETENCE OF FUTURE MUSIC EDUCATION TEACHERS
Creators: name: Djalilova, Dilnozakhan
Publisher: name: Zenodo
Year: 2024

description: The article analyzes the content and essence of developing the hermeneutic competence of future music education teachers by forming the integration of music education and social and humanitarian sciences in music education, establishing interdisciplinary cooperation.
CdTe-HgTe core-shell nanowire growth controlled by RHEED
Creators: name: Kessel, M.
name: Hajer, J.
name: Karczewski, G.
name: Schumacher, C.
name: Brüne, C.
name: Buhmann, H.
name: Molenkamp, L. W.
Publisher: name: arXiv
Year: 2017
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: We present results on the growth of CdTe-HgTe core-shell nanowires, a realization of a quasi one-dimensional heterostructure of the topological insulator HgTe. The growth is a two step process consisting of the growth of single crystalline zinc blende CdTe nanowires with the vapor-liquid-solid method and the overgrowth of these wires with HgTe such that a closed shell is formed around the CdTe core structure. The CdTe wire growth is monitored by RHEED allowing us to infer information on the crystal properties from the electron diffraction pattern. This information is used to find and control the optimal growth temperature. High quality single crystal CdTe nanowires grow with a preferred orientation. For the growth of the conductive HgTe shell structure we find that the supplied Hg:Te ratio is the crucial parameter to facilitate growth on all surface facets.
Hydrodynamic simulations of the central molecular zone with realistic Galactic potential
Creators: name: Shin, Jihye
name: Kim, Sungsoo S.
name: Baba, Junichi
name: Saitoh, Takayuki R.
name: Hwang, Jeong-Sun
name: Chun, Kyungwon
name: Hozumi, Shunsuke
Publisher: name: arXiv
Year: 2017
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We present hydrodynamic simulations of gas clouds inflowing from the disk to a few hundred parsec region of the Milky Way. A gravitational potential is generated to include realistic Galactic structures by using thousands of multipole expansions that describe 6.4 million stellar particles of a self-consistent Galaxy simulation. We find that a hybrid multipole expansion model, with two different basis sets and a thick disk correction, accurately reproduces the overall structures of the Milky Way. Through non-axisymmetric Galactic structures of an elongated bar and spiral arms, gas clouds in the disk inflow to the nuclear region and form a central molecular zone (CMZ)-like nuclear ring. We find that the size of the nuclear ring evolves into ~240 pc at T~1500 Myr, regardless of the initial size. For most simulation runs, the rate of gas inflow to the nuclear region is equilibrated to ~0.02 M_sun/yr. The nuclear ring is off-centered, relative to the Galactic center, by the lopsided central mass distribution of the Galaxy model, and thus an asymmetric mass distribution of the nuclear ring arises accordingly. The vertical asymmetry of the the Galaxy model also causes the nuclear ring to be tilted along the Galactic plane. During the first ~100 Myr, the vertical frequency of the gas motion is twice that of the orbital frequency, thus the projected nuclear ring shows a twisted, infinity-like shape.
description: Accepted for publication in ApJ
A QFT-induced phase in neutrino flavour oscillations
Creators: name: Ahluwalia, Dharam Vir
name: Lee, Cheng-Yang
Publisher: name: arXiv
Year: 2017
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: In the extended Standard Model of particle physics, each neutrino mass eigenstate is predicted to have a tiny but non vanishing magnetic moment induced by quantum field theoretic corrections. These QFT-induced magnetic momenta depend linearly on masses of the underlying mass eigenstates with a proportionality constant ${3eG_{F}}/{(8\sqrt{2}π^{2})} $. As a consequence when neutrinos are embedded in an environment containing magnetic fields the flavour oscillations get a contribution from the induced relative phases.
description: 6 pages
Cancellation of Conformal and Chiral Anomalies in $N \geq 5$ supergravities
Creators: name: Kallosh, Renata
Publisher: name: arXiv
Year: 2016
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: A cancellation of conformal anomalies in d=4 for the $C^2+\bar C^2$ and of chiral anomalies for the $C^2-\bar C^2$ is known in N-extended supergravities with $N \geq 5$. We propose an explanation of these cancellations using supersymmetry and dimension of linearized chiral superfields. We contrast these models with the ones with $N < 5$, where both types of anomalies are known to be present.
description: 4 pages
Relativistic coupled cluster calculations of the electron affinity and ionization potentials of lawrencium
Creators: name: Guo, Yangyang
name: Pašteka, Lukáš F
name: Nagame, Yuichiro
name: Sato, Tetsuya K.
name: Eliav, Ephraim
name: Reitsma, Marten L.
name: Borschevsky, Anastasia
Publisher: name: arXiv
Year: 2024
Subjects: subject: Atomic Physics (physics.atom-ph)
subject: FOS: Physical sciences

description: The calculations of the first and the second ionization potentials of lawrencium and lutetium and the electron affinity of lawrencium are performed within the relativistic coupled cluster framework. These results are corrected by including the contributions of extrapolation to the complete basis set limit and higher order contributions due to relativity and electron correlation. The excellent agreement between our predictions of the ionization potentials of Lu and Lr and experimental values supports the accuracy of our predictions of the second ionization potential and the electron affinity of Lr.
SCIENTIFIC-PEDAGOGICAL BASIS OF DEVELOPMENT OF HERMENEUTIC COMPETENCE OF FUTURE MUSIC EDUCATION TEACHERS
Creators: name: Djalilova, Dilnozakhan
Publisher: name: Zenodo
Year: 2024

description: The article presents three components of the educational process: a competency-based approach to the organization of the educational process, focusing on its result; systematic-active approach to systematization of students' educational activities; A person-oriented approach to the programming of "student-teacher" relations, which implies subject-subject relations affecting the formation of hermeneutic competence, is analyzed.
The giant outburst of EXO 2030+375 I: Spectral and pulse profile evolution
Creators: name: Thalhammer, P.
name: Ballhausen, R.
name: Sokolova-Lapa, E.
name: Stierhof, J.
name: Zainab, A.
name: Staubert, R.
name: Pottschmidt, K.
name: Coley, J. B.
name: Rothschild, R. E.
name: Jaisawal, G. K.
name: West, B.
name: Becker, P. A.
name: Pradhan, P.
name: Kretschmar, P.
name: Wilms, J.
Publisher: name: arXiv
Year: 2024
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: The Be X-ray binary EXO 2030+375 went through its third recorded giant outburst from June 2021 to early 2022. We present the results of both spectral and timing analysis based on NICER monitoring, covering the 2-10 keV flux range from 20 to 310 mCrab. Dense monitoring with observations carried out about every second day and a total exposure time of 160 ks allowed us to closely track the source evolution over the outburst. Changes in spectral shape and pulse profiles showed a stable luminosity dependence during the rise and decline. The same type of dependence has been seen in past outbursts. The pulse profile is characterized by several distinct peaks and dips. The profiles show a clear dependence on luminosity with a stark transition at a luminosity of 2x10^36 erg/s, indicating a change in the emission pattern. Using relativistic ray-tracing, we demonstrate how anisotropic beaming of emission from an accretion channel with constant geometrical configuration can give rise to the observed pulse profiles over a range of luminosities.
description: 15 pages, 16 figures, accepted by A&A
The dependence of protostar formation on the geometry and strength of the initial magnetic field
Creators: name: Lewis, Benjamin T.
name: Bate, Matthew R.
Publisher: name: arXiv
Year: 2017
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We report results from twelve simulations of the collapse of a molecular cloud core to form one or more protostars, comprising three field strengths (mass-to-flux ratios, μ, of 5, 10, and 20) and four field geometries (with values of the angle between the field and rotation axes, θ, of 0°, 20°, 45°, and 90°), using a smoothed particle magnetohydrodynamics method. We find that the values of both parameters have a strong effect on the resultant protostellar system and outflows. This ranges from the formation of binary systems when μ = 20 to strikingly differing outflow structures for differing values of θ, in particular highly suppressed outflows when θ = 90°. Misaligned magnetic fields can also produce warped pseudo-discs where the outer regions align perpendicular to the magnetic field but the innermost region re-orientates to be perpendicular to the rotation axis. We follow the collapse to sizes comparable to those of first cores and find that none of the outflow speeds exceed 8 km s$^{-1}$. These results may place constraints on both observed protostellar outflows, and also on which molecular cloud cores may eventually form either single stars and binaries: a sufficiently weak magnetic field may allow for disc fragmentation, whilst conversely the greater angular momentum transport of a strong field may inhibit disc fragmentation.
description: Accepted for publication in MNRAS. 14 pages, 14 figures. Animations are other details can be found at http://www.astro.ex.ac.uk/people/blewis/research/outflows_weak_fields.html
BUXORO AMIRLIGINING JANUBIY HUDUDLARIDA MELORATSIYA VA IRRIGATSIYA TARMOQLARINING RIVOJLANISHI
Creators: name: Choriev, Nuriddin
Publisher: name: Zenodo
Year: 2024

description: Maqolada Buxoro amirligining Chor Rossiyasi hukmronligi davridagi iqtisodiy qaramligi, 1873 yil 23 sentyabrda imzolangan Buxoro amiri Said Muzaffar va Fon Kaufman o‘rtasidagi shartnoma, O‘rta Osiyo temir yo‘lining qurilishi, irrigatsiya va meloratsiya ishlarining olib borilishi, yangi suv inshoatlarining barpo etilishi va uning amaliyotda qo‘llanilishi, ishchilarga ish xaqqini to‘lash shartlari va mehnatni rag‘batlantirish ishlari, beton va temirbeton yordamida suv ayrgichlarining qurilishi bayon etilgan.
Squeezing and EPR correlation in the Mirrorless Optical Parametric Oscillator
Creators: name: Gatti, A.
name: Corti, T.
name: Brambilla, E.
Publisher: name: arXiv
Year: 2017
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: This work analyses the quantum properties of counter-propagating twin beams generated by a Mirrorless Optical Parametric Oscillator in the continuous variable regime. Despite the lack of the filtering effect of a cavity, we show that in the vicinity of its threshold it may generate high levels of narrowband squeezing and Einstein-Podolsky-Rosen (EPR) correlation, completely comparable to what can be obtained in standard optical parametric oscillators.
description: 7 pages, 5 figures
Finite-representation approximation of lattice gauge theories at the continuum limit with tensor networks
Creators: name: Buyens, Boye
name: Montangero, Simone
name: Haegeman, Jutho
name: Verstraete, Frank
name: Van Acoleyen, Karel
Publisher: name: arXiv
Year: 2017
Subjects: subject: High Energy Physics - Lattice (hep-lat)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: High Energy Physics - Theory (hep-th)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: It has been established that Matrix Product States can be used to compute the ground state and single-particle excitations and their properties of lattice gauge theories at the continuum limit. However, by construction, in this formalism the Hilbert space of the gauge fields is truncated to a finite number of irreducible representations of the gauge group. We investigate quantitatively the influence of the truncation of the infinite number of representations in the Schwinger model, one-flavour QED$_2$, with a uniform electric background field. We compute the two-site reduced density matrix of the ground state and the weight of each of the representations. We find that this weight decays exponentially with the quadratic Casimir invariant of the representation which justifies the approach of truncating the Hilbert space of the gauge fields. Finally, we compute the single-particle spectrum of the model as a function of the electric background field.
description: 16 + 5 pages, 15 figures
ТЕЗКОР-ҚИДИРУВ ФАОЛИЯТИНИ ТАРТИБГА СОЛУВЧИ ҲУҚУҚИЙ НОРМАЛАРИНИ ТАКОМИЛЛАШТИРИШ МАСАЛАЛАРИ
Creators: name: Артиков, Самандар
Publisher: name: Zenodo
Year: 2024

description: Юртимизда ҳозирги кунда содир бўлаётган иқтисодий, ижтимоий, сиёсий ва бошқа соҳадаги ислоҳотларнинг барчаси фуқароларимизнинг манфаатлари ҳамда демократик жамият қуриш йўлида амалга оширилмоқда. Ўзбекистон Республикаси Президентининг 2021 йил 26 мартдаги “Жамоат хавфсизлигини таъминлаш ва жиноятчиликка қарши курашиш соҳасида ички ишлар органлари фаолиятини сифат жиҳатидан янги босқичга кўтариш чора-тадбирлари тўғрисида”ги ПФ-6196-сон Фармонига асосан ҳамда ИИО жиноятларни ўз вақтида аниқлаш, олдини олиш қидирув ишларини амалга оширишни такомиллаштириш, фуқароларнинг ҳуқуқлари, эркинликлари ва қонуний манфаатларини ҳимоя қилиш, жамоат тартибини сақлаш, шахс, жамият ва давлат хавфсизлигини таъминлаш, ҳуқуқбузарликларнинг олдини олиш ва профилактикаси бўйича кенг кўламли ишлар амалга оширилди.
Excitonic Insulator State of the Extended Falicov-Kimball Model in the Cluster Dynamical Impurity Approximation
Creators: name: Hamada, Kosuke
name: Kaneko, Tatsuya
name: Miyakoshi, Shohei
name: Ohta, Yukinori
Publisher: name: arXiv
Year: 2017
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We comparatively study the excitonic insulator state in the extended Falicov-Kimball model (EFKM, a spinless two-band model) on the two-dimensional square lattice using the variational cluster approximation (VCA) and the cluster dynamical impurity approximation (CDIA). In the latter, the particle-bath sites are included in the reference cluster to take into account the particle-number fluctuations in the correlation sites. We thus calculate the particle-number distribution, order parameter, ground-state phase diagram, anomalous Green's function, and pair coherence length, thereby demonstrating the usefulness of the CDIA in the discussion of the excitonic condensation in the EFKM.
description: 6 pages, 5 figures, J. Phys. Soc. Jpn. (in press)
The Impact of Gaia DR1 on Asteroseismic Inferences from Kepler
Creators: name: Metcalfe, Travis
name: Creevey, Orlagh
name: van Saders, Jennifer
Publisher: name: arXiv
Year: 2017
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: FOS: Physical sciences

description: The Kepler mission has been fantastic for asteroseismology of solar-type stars, but the targets are typically quite distant. As a consequence, the reliability of asteroseismic modeling has been limited by the precision of additional constraints from high-resolution spectroscopy and parallax measurements. A precise luminosity is particularly useful to minimize potential biases due to the intrinsic correlation between stellar mass and initial helium abundance. We have applied the latest version of the Asteroseismic Modeling Portal (AMP) to the complete Kepler data sets for 30 stars with known rotation rates and chromospheric activity levels. We compare the stellar properties derived with and without the measured parallaxes from the first data release of Gaia. We find that in most cases the masses and ages inferred from asteroseismology shift within their uncertainties. For a few targets that show larger shifts, the updated stellar properties only strengthen previous conclusions about anomalous rotation in middle-aged stars.
description: 5 pages, 3 figures, for Proceedings of the 22nd Los Alamos Stellar Pulsation Conference, posted for open peer review
Transition probabilities of Lévy-type processes: Parametrix construction
Creators: name: Kühn, Franziska
Publisher: name: arXiv
Year: 2017
Subjects: subject: Probability (math.PR)
subject: FOS: Mathematics
subject: 60J35, 60J25, 60G51, 60H10, 60J75, 35S05

description: We present an existence result for Lévy-type processes which requires only weak regularity assumptions on the symbol $q(x,ξ)$ with respect to the space variable $x$. Applications range from existence and uniqueness results for Lévy-driven SDEs with Hölder continuous coefficients to existence results for stable-like processes and Lévy-type processes with symbols of variable order. Moreover, we obtain heat kernel estimates for a class of Lévy and Lévy-type processes. The paper includes an extensive list of Lévy(-type) processes satisfying the assumptions of our results.
"ОДАМ САДОСИ ЖИНОЯТЛАРИ ЮЗАСИДАН ДАЛИЛЛАР ТЎПЛАШ ВА ТЕРГОВ ҚИЛИШДА ДАЛИЛЛАРНИ ҚАЙД ЭТИШНИНГ ЁРДАМЧИ УСУЛЛАРНИНГ МУҲИМЛИГИ ВА АҲАМИЯТИ"
Creators: name: Алламов, Дилшод
Publisher: name: Zenodo
Year: 2024

description: Мамлакатимизда амалга оширилаётган суд-ҳуқуқ ислоҳотлари Ўзбекистон Республикасининг ривожланган давлатлар қаторида инсон ҳуқуқлари ва манфаатларини ҳимоя қилиш, одил судловни таъминлаш, терговга қадар текширув ва дастлабки тергов жараёнларида далилларни тўплаш ва қайд этишнинг замонавий усулларини жорий қилиш ва бу жараёнда жиноят процесси иштирокчиларига ёки уларнинг яқин қариндошларига нисбатан қийноққа солиш ва бошқа шафқатсиз, ғайриинсоний ёки қадр-қимматни камситувчи муомала ҳамда жазо турларини қўллашга нисбатан муросасиз муносабатда бўлишда ифодаланган сиёсат олиб борилаётганлигининг ёрқин мисолидир.
Relating Measurable Correlations in Heavy Ion Collisions to Bulk Properties of Equilibrated QCD Matter
Creators: name: Pratt, Scott
name: Young, Clint
Publisher: name: arXiv
Year: 2016
Subjects: subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: In order to compare theoretical calculations of thermal fluctuations of conserved quantities, such as charge susceptibilities or the specific heat, to experimentally measured correlations and fluctuations in heavy ion collisions, one must confront the reality of changing conditions within the collision environment, and transport of conserved quantities within the finite duration of the expansion and dissolution of the reaction. In previous work, fluctuations of conserved charges from lattice calculations, where charge is allowed to fluctuate within the designated volume consistent with the grand canonical ensemble, was linked to correlations in heavy-ion collisions, which accounted for the finite time with which to transport absolutely conserved quanatities. In this case details of the correlations were related to the evolution of the susceptibility. In this work, this paradigm is extended to compare fluctuations of momentum or energy to transverse energy correlations that can be measured in heavy-ion collisions. The sensitivity of these correlations to the equation of state, viscosity and diffusion is illustrated by considering simple models without transverse expansion. Only correlations in relative spatial rapidity are discussed here, but the prospects for extending these ideas to realistic calculations and for making realistic connections with experiment are discussed.
description: 30 pages, 9 figures
Magneto-Optical Quantum Switching in a System of Spinor Excitons
Creators: name: Kuan, Wen-Hsuan
name: Gudmundsson, Vidar
Publisher: name: arXiv
Year: 2017
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: In this work we investigate magneto-optical properties of two-dimensional semiconductor quantum-ring excitons with Rashba and Dresselhaus spin-orbit interactions threaded by a magnetic flux perpendicular to the plane of the ring. By calculating the excitonic Aharonov-Bohm spectrum, we study the Coulomb and spin-orbit effects on the Aharonov-Bohm features. From the light-matter interactions of the excitons, we find that for scalar excitons, there are open channels for spontaneous recombination resulting in a bright photoluminescence spectrum, whereas the forbidden recombination of dipolar excitons results in a dark photoluminescence spectrum. We investigate the generation of persistent charge and spin currents. The exploration of spin orientations manifests that by adjusting the strength of the spin-orbit interactions, the exciton can be constructed as a squeezed complex with specific spin polarization. Moreover, a coherently moving dipolar exciton acquires a nontrivial dual Aharonov-Casher phase, creating the possibility to generate persistent dipole currents and spin dipole currents. Our study reveals that a manipulation of the spin-orbit interactions provides a potential application for quantum-ring spinor excitons to be utilized in nano-scaled magneto-optical switches.
description: RevTeX, 13 pages with included 8 eps figures
ИЧКИ ИШЛАР ОРГАНЛАРИ ЖАМОАТ ХАВФСИЗЛИГИ ХИЗМАТИ ХОДИМЛАРИНИ ИЖТИМОИЙ ҲИМОЯ ҚИЛИШНИНГ ЎЗИГА ХОС ЖИҲАТЛАРИ
Creators: name: Эркинов, Тўлқин
Publisher: name: Zenodo
Year: 2024

description: Глобаллашув шароитида юзага келаётган ғоявий-мафкуравий урушлар ва ахборот хуружлари, халқаро тусдаги ижтимоий-иқтисодий қарама-қаршиликлар, минтақавий можаролар, оммавий норозиликлар ва ички низолар кучайиб бораётганлиги - дунё мамлакатларида хавфсизликни таъминлаш тизимининг замонавий таҳдидларга қарши курашиш бўйича реал имкониятларини кенгайтириб бориш долзарб тус олмоқда. Айниқса, хавфсизлик, мудофаа ва ҳуқуқ-тартиботни таъминловчи субъектлар тезкор ва жанговар қобилиятини ошириш[1], бунда ички ишлар ораганлари ходимларини ҳар қандай таҳдидларни олдини олиш учун доимий шай ҳолатда сақлаш муҳим аҳамият касб этмоқда.
A Combined Crossed Molecular Beam and Theoretical Investigation of the CN(X2Σ+) + HCCCN and CN(X2Σ+) + H2CCHCN Reactions and Astrophysical Implications
Creators: name: P. Liang
name: D. Marchione
name: L. Mancini
name: G. Vanuzzo
name: E. V. F. De Aragão
name: N. Faginas Lago
name: M. Rosi
name: D. Skouteris
name: N. Balucani
name: P. Casavecchia
Publisher: name: Zenodo
Year: 2021

description: CN is one of the most abundant and widespread radicals in the interstellar medium The fast reactions between CN and unsaturated hydrocarbons generate various nitriles including HC3N and H2CCHCN, which are alleged to be prebiotic molecules HC3N is ubiquitous in interstellar environments Similarly, H2CCHCN has also been detected in numerous objects, such as the dark cloud TMC 1 massive star forming regions Sgr B 2 and Orion KL, the circumstellar envelope of the C rich star IRC 10216 and Titan's atmosphere. Because of the wide distribution of these species, it is interesting to explore if the reactivity of CN with HC3N and H2CCHCN can produce more complex nitriles Kinetics studies confirmed that the rate constant for the CN (X2∑+) + HC3N reaction increases rapidly as the temperature decreases from 300 K to 22 K while few studies have focused on the CN(X2∑+) + H2CCHCN reaction Furthermore, there are no experimental data on the reaction products and their branching ratios Given these open questions, it is essential to gain further insights into these elementary reactions, both experimentally and theoretically.