cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Long-term 4.6$μ$m Variability in Brown Dwarfs and a New Technique for Identifying Brown Dwarf Binary Candidates
Creators: name: Brooks, Hunter
name: Kirkpatrick, J. Davy
name: Meisner, Aaron M.
name: Gelino, Christopher R.
name: Gagliuffi, Daniella C. Bardalez
name: Marocco, Federico
name: Schneider, Adam C.
name: Faherty, Jacqueline K.
name: Casewell, S. L.
name: Raghu, Yadukrishna
name: Kuchner, Marc J.
name: Worlds, The Backyard
name: :
name: Collaboration, Planet 9
Publisher: name: arXiv
Year: 2023
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: Using a sample of 361 nearby brown dwarfs, we have searched for 4.6$μ$m variability indicative of large-scale rotational modulations or large-scale long-term changes on timescales of over 10 years. Our findings show no statistically significant variability in \textit{Spitzer} ch2 or \textit{WISE} W2 photometry. For \textit{Spitzer} the ch2 1$σ$ limits are $\sim$8 mmag for objects at 11.5 mag and $\sim$22 mmag for objects at 16 mag. This corresponds to no variability above 4.5$\%$ at 11.5 mag and 12.5$\%$ at 16 mag. We conclude that highly variable brown dwarfs, at least two previously published examples of which have been shown to have 4.6$μ$m variability above 80 mmag, are very rare. While analyzing the data, we also developed a new technique for identifying brown dwarfs binary candidates in \textit{Spitzer} data. We find that known binaries have IRAC ch2 PRF (point response function) flux measurements that are consistently dimmer than aperture flux measurements. We have identified 59 objects that exhibit such PRF versus apertures flux differences and are thus excellent binary brown dwarf candidates.
description: 18 pages, 11 figures, accepted for publication in AJ, and 1 figure set of 361 figures with the example being figure 8
title: Ð Ð°Ð·ÑÐ°Ð±Ð¾ÑÐºÐ° Ð¼Ð¾Ð´ÐµÐ»Ð¸ Ð¿ÑÐ¸Ð¼ÐµÐ½ÐµÐ½Ð¸Ñ ÑÐµÑ Ð½Ð¾Ð»Ð¾Ð³Ð¸Ð¸ ÐºÑÐ°ÑÐ´ÑÐ¾ÑÑÐ¸Ð½Ð³Ð° Ð² Ð¿ÑÐ¾ÐµÐºÑÐ°Ñ Ð¼Ð¾Ð´ÐµÑÐ½Ð¸Ð·Ð°ÑÐ¸Ð¸ ÐºÐ¾ÑÐ¿Ð¾ÑÐ°ÑÐ¸Ð²Ð½Ð¾Ð¹ Ð¸Ð½ÑÐ¾ÑÐ¼Ð°ÑÐ¸Ð¾Ð½Ð½Ð¾Ð¹ ÑÐ¸ÑÑÐµÐ¼Ñ
title: Ð½Ð°ÑÑÐ½ÑÐ¹ Ð´Ð¾ÐºÐ»Ð°Ð´
titleType: Subtitle
Creators: name: ÐÐ°ÐºÐ¾Ð², ÐÐ¾Ð½ÑÑÐ°Ð½ÑÐ¸Ð½
Publisher: name: Ð¡Ð°Ð½ÐºÑ-ÐÐµÑÐµÑÐ±ÑÑÐ³ÑÐºÐ¸Ð¹ Ð¿Ð¾Ð»Ð¸ÑÐµÑÐ½Ð¸ÑÐµÑÐºÐ¸Ð¹ ÑÐ½Ð¸Ð²ÐµÑÑÐ¸ÑÐµÑ ÐÐµÑÑÐ° ÐÐµÐ»Ð¸ÐºÐ¾Ð³Ð¾
Year: 2018
Subjects: ÐÐ½ÑÐ¾ÑÐ¼Ð°ÑÐ¸Ð¾Ð½Ð½ÑÐµ ÑÐ¸ÑÑÐµÐ¼Ñ
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description: Ð¡Ð¾Ð²ÐµÑÑÐµÐ½ÑÑÐ²Ð¾Ð²Ð°Ð½Ð¸Ðµ Ð¿ÑÐ¾ÑÐµÑÑÐ° ÑÐµÑÑÐ¸ÑÐ¾Ð²Ð°Ð½Ð¸Ñ ÑÐ²Ð»ÑÐµÑÑÑ Ð°ÐºÑÑÐ°Ð»ÑÐ½Ð¾Ð¹ Ð¿ÑÐ¾Ð±Ð»ÐµÐ¼Ð¾Ð¹ Ð² Ð¿ÑÐ¾ÑÐµÑÑÐµ Ð²ÑÐ¿ÑÑÐºÐ° ÑÐµÐ»Ð¸Ð·Ð¾Ð² Ð¸Ð½ÑÐ¾ÑÐ¼Ð°ÑÐ¸Ð¾Ð½Ð½ÑÑ ÑÐ¸ÑÑÐµÐ¼ Ð¿ÑÐµÐ´Ð¿ÑÐ¸ÑÑÐ¸Ñ, Ð° Ð¿ÑÐ¸Ð¼ÐµÐ½ÐµÐ½Ð¸Ðµ ÐºÑÐ°ÑÐ´ÑÐ¾ÑÑÐ¸Ð½Ð³Ð° ÑÐ²Ð»ÑÐµÑÑÑ Ð½Ð°ÑÑÐ½Ð¾Ð¹ Ð½Ð¾Ð²Ð¸Ð·Ð½Ð¾Ð¹ Ð¸ÑÑÐ»ÐµÐ´Ð¾Ð²Ð°Ð½Ð¸Ñ. ÐÐºÑÑÐ°Ð»ÑÐ½Ð¾ÑÑÑ Ð¸ÑÐ¿Ð¾Ð»ÑÐ·Ð¾Ð²Ð°Ð½Ð¸Ñ ÐºÑÐ°ÑÐ´ÑÐ¾ÑÑÐ¸Ð½Ð³Ð° ÑÐ°ÐºÐ¶Ðµ Ð¿Ð¾Ð´ÑÐ²ÐµÑÐ¶Ð´Ð°ÐµÑÑÑ Ð¸ÑÑÐ»ÐµÐ´Ð¾Ð²Ð°ÑÐµÐ»ÑÑÐºÐ¸Ð¼Ð¸ Ð´Ð°Ð½Ð½ÑÐ¼Ð¸ ÐºÐ¾Ð¼Ð¿Ð°Ð½Ð¸Ð¸ Â«GartnerÂ», Ð¿Ð¾ Ð¼Ð½ÐµÐ½Ð¸Ñ ÐºÐ¾ÑÐ¾ÑÐ¾Ð¹ Ðº 2018 Ð³Ð¾Ð´Ñ ÐºÑÐ°ÑÐ´ÑÐ¾ÑÑÐ¸Ð½Ð³ ÑÐ¾ÑÑÐ°Ð²Ð¸Ñ 20% Ð²ÑÐµÑ Ð¸Ð½Ð¸ÑÐ¸Ð°ÑÐ¸Ð² Ð¿Ð¾ ÑÐ°Ð·ÑÐ°Ð±Ð¾ÑÐºÐµ Ð¿ÑÐ¸Ð»Ð¾Ð¶ÐµÐ½Ð¸Ð¹ Ð´Ð»Ñ Ð¿ÑÐµÐ´Ð¿ÑÐ¸ÑÑÐ¸Ð¹. ÐÐ±ÑÐµÐºÑÐ¾Ð¼ Ð¸ÑÑÐ»ÐµÐ´Ð¾Ð²Ð°Ð½Ð¸Ñ Ð´Ð°Ð½Ð½Ð¾Ð¹ ÑÐ°Ð±Ð¾ÑÑ ÑÐ²Ð»ÑÑÑÑÑ ÐºÑÑÐ¿Ð½ÑÐµ Ð¿ÑÐµÐ´Ð¿ÑÐ¸ÑÑÐ¸Ñ ÑÑÐµÑÑ ÑÐ¾Ð·Ð½Ð¸ÑÐ½Ð¾Ð¹ ÑÐ¾ÑÐ³Ð¾Ð²Ð»Ð¸, ÐºÐ¾ÑÐ¾ÑÑÐµ Ð¸Ð¼ÐµÑÑ Ð¸ Ð¸ÑÐ¿Ð¾Ð»ÑÐ·ÑÑÑ ÐºÐ¾ÑÐ¿Ð¾ÑÐ°ÑÐ¸Ð²Ð½ÑÑ Ð¸Ð½ÑÐ¾ÑÐ¼Ð°ÑÐ¸Ð¾Ð½Ð½ÑÑ ÑÐ¸ÑÑÐµÐ¼Ñ Ð´Ð»Ñ ÑÐ¿ÑÐ°Ð²Ð»ÐµÐ½Ð¸Ñ ÑÐ²Ð¾ÐµÐ¹ Ð°Ð´Ð¼Ð¸Ð½Ð¸ÑÑÑÐ°ÑÐ¸Ð²Ð½Ð¾-ÑÐ¾Ð·ÑÐ¹ÑÑÐ²ÐµÐ½Ð½Ð¾Ð¹ Ð´ÐµÑÑÐµÐ»ÑÐ½Ð¾ÑÑÑÑ. ÐÑÐµÐ´Ð¼ÐµÑÐ¾Ð¼ Ð¸ÑÑÐ»ÐµÐ´Ð¾Ð²Ð°Ð½Ð¸Ñ ÑÐ²Ð»ÑÑÑÑÑ ÐºÐ¾ÑÐ¿Ð¾ÑÐ°ÑÐ¸Ð²Ð½ÑÐµ Ð¸Ð½ÑÐ¾ÑÐ¼Ð°ÑÐ¸Ð¾Ð½Ð½ÑÐµ ÑÐ¸ÑÑÐµÐ¼Ñ Ð¿ÑÐµÐ´Ð¿ÑÐ¸ÑÑÐ¸Ñ Ð¸, Ð² ÑÐ°ÑÑÐ½Ð¾ÑÑÐ¸, Ð¿ÑÐ¾ÑÐµÑÑ ÑÐµÑÑÐ¸ÑÐ¾Ð²Ð°Ð½Ð¸Ñ ÑÐµÐ»Ð¸Ð·Ð¾Ð² Ð½Ð¾Ð²ÑÑ ÑÑÐ½ÐºÑÐ¸Ð¹ Ð¸Ð½ÑÐ¾ÑÐ¼Ð°ÑÐ¸Ð¾Ð½Ð½Ð¾Ð¹ ÑÐ¸ÑÑÐµÐ¼Ñ. Ð¦ÐµÐ»ÑÑ Ð´Ð°Ð½Ð½Ð¾Ð³Ð¾ Ð¸ÑÑÐ»ÐµÐ´Ð¾Ð²Ð°Ð½Ð¸Ñ ÑÐ²Ð»ÑÐµÑÑÑ ÑÐ¾Ð²ÐµÑÑÐµÐ½ÑÑÐ²Ð¾Ð²Ð°Ð½Ð¸Ðµ Ð¿ÑÐ¾ÑÐµÑÑÐ° ÑÐµÑÑÐ¸ÑÐ¾Ð²Ð°Ð½Ð¸Ñ ÑÐµÐ»Ð¸Ð·Ð¾Ð² Ð¸Ð½ÑÐ¾ÑÐ¼Ð°ÑÐ¸Ð¾Ð½Ð½Ð¾Ð¹ ÑÐ¸ÑÑÐµÐ¼Ñ Ð¿ÑÐµÐ´Ð¿ÑÐ¸ÑÑÐ¸Ñ.Ð ÑÐ°Ð¼ÐºÐ°Ñ Ð¿ÑÐµÐ´ÑÑÐ°Ð²Ð»ÐµÐ½Ð½Ð¾Ð³Ð¾ Ð¸ÑÑÐ»ÐµÐ´Ð¾Ð²Ð°Ð½Ð¸Ñ Ð±ÑÐ» Ð¿ÑÐ¾Ð²ÐµÐ´ÐµÐ½ Ð¿Ð¾Ð´ÑÐ¾Ð±Ð½ÑÐ¹ Ð°Ð½Ð°Ð»Ð¸Ð· ÑÑÑÐµÑÑÐ²ÑÑÑÐ¸Ñ ÑÑÐ°Ð½Ð´Ð°ÑÑÐ¾Ð², Ð¼ÐµÑÐ¾Ð´Ð¾Ð»Ð¾Ð³Ð¸Ð¹ Ð¿ÑÐ¾Ð²ÐµÐ´ÐµÐ½Ð¸Ñ Ð¸ Ð¿Ð¾Ð´ÑÐ¾Ð´Ð¾Ð² Ðº ÑÐµÐ°Ð»Ð¸Ð·Ð°ÑÐ¸Ð¸ Ð² Ð¾Ð±Ð»Ð°ÑÑÐ¸ ÑÐµÑÑÐ¸ÑÐ¾Ð²Ð°Ð½Ð¸Ñ Ð¿ÑÐ¾Ð³ÑÐ°Ð¼Ð¼Ð½Ð¾Ð³Ð¾ Ð¾Ð±ÐµÑÐ¿ÐµÑÐµÐ½Ð¸Ñ. Ð ÑÐ°ÑÑÐ½Ð¾ÑÑÐ¸, Ð±ÑÐ»Ð¸ ÑÐ°ÑÑÐ¼Ð¾ÑÑÐµÐ½Ñ ÐºÐ°ÑÐºÐ°Ð´Ð½Ð°Ñ Ð¸ Ð³Ð¸Ð±ÐºÐ°Ñ Ð¼Ð¾Ð´ÐµÐ»Ñ ÑÐµÑÑÐ¸ÑÐ¾Ð²Ð°Ð½Ð¸Ñ ÐÐ, Ð¿ÑÐ¾Ð°Ð½Ð°Ð»Ð¸Ð·Ð¸ÑÐ¾Ð²Ð°Ð½Ñ ÐºÐ»Ð°ÑÑÐ¸ÑÐµÑÐºÐ¸Ð¹ Ð¿Ð¾Ð´ÑÐ¾Ð´ Ðº Ð¿ÑÐ¾Ð²ÐµÐ´ÐµÐ½Ð¸Ñ ÑÐµÑÑÐ¸ÑÐ¾Ð²Ð°Ð½Ð¸Ñ, Ð°ÑÑÑÐ¾ÑÑÐ¸Ð½Ð³ Ð¸ ÐºÑÐ°ÑÐ´ÑÐ¾ÑÑÐ¸Ð½Ð³ ÑÑÐ¾Ð³Ð¾ Ð¿ÑÐ¾ÑÐµÑÑÐ°.
Spicule-like structures observed in 3D realistic MHD simulations
Creators: name: Martinez-Sykora, J.
name: Hansteen, V.
name: De Pontieu, B.
name: Carlsson, M.
Publisher: name: arXiv
Year: 2009
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: We analyze features that resemble type i spicules in two different 3D numerical simulations in which we include horizontal magnetic flux emergence in a computational domain spanning the upper layers of the convection zone to the lower corona. The two simulations differ mainly in the preexisting ambient magnetic field strength and in the properties of the inserted flux tube. We use the Oslo Staggered Code (OSC) to solve the full MHD equations with non-grey and non-LTE radiative transfer and thermal conduction along the magnetic field lines. We find a multitude of features that show a spatiotemporal evolution that is similar to that observed in type i spicules, which are characterized by parabolic height vs. time profiles, and are dominated by rapid upward motion at speeds of 10-30 km/s, followed by downward motion at similar velocities. We measured the parameters of the parabolic profile of the spicules and find similar correlations between the parameters as those found in observations. The values for height (or length) and duration of the spicules found in the simulations are more limited in range than those in the observations. The spicules found in the simulation with higher preexisting ambient field have shorter length and smaller velocities. From the simulations, it appears that these kinds of spicules can, in principle, be driven by a variety of mechanisms that include p-modes, collapsing granules, magnetic energy release in the photosphere and lower chromosphere and convective buffeting of flux concentrations.
description: 31 pages, 9 figures. accepted the 23 of June in ApJ
Sensitivity study of chemistry in AGB outflows using chemical kinetics
Creators: name: Maes, S.
name: Van de Sande, M.
name: Danilovich, T.
name: De Ceuster, F.
name: Decin, L.
Publisher: name: arXiv
Year: 2023
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: Asymptotic Giant Branch (AGB) stars shed a significant amount of their mass in the form of a stellar wind, creating a vast circumstellar envelope (CSE). Owing to the ideal combination of relatively high densities and cool temperatures, CSEs serve as rich astrochemical laboratories. {While the chemical structure of AGB outflows has been modelled and analysed in detail for specific physical setups, there is a lack of understanding regarding the impact of changes in the physical environment on chemical abundances. A systematic sensitivity study is necessary to comprehend the nuances in the physical parameter space, given the complexity of the chemistry. This is crucial for estimating uncertainties associated with simulations and observations. In this work, we present the first sensitivity study of the impact of varying outflow densities and temperature profiles on the chemistry. With the use of a chemical kinetics model, we report on the uncertainty in abundances, given a specific uncertainty on the physical parameters. }Additionally, we analyse the molecular envelope extent of parent species and compare our findings to observational studies. Mapping the impact of differences in physical parameters throughout the CSE on the chemistry is a strong aid to observational studies.
description: 21 pages, 25 figures
title: Ð Ð°Ð·ÑÐ°Ð±Ð¾ÑÐºÐ° ÑÐµÐºÐ¾Ð¼ÐµÐ½Ð´Ð°ÑÐ¸Ð¹ Ð¿Ð¾ Ð¿Ð¾Ð²ÑÑÐµÐ½Ð¸Ñ ÑÑÑÐµÐºÑÐ¸Ð²Ð½Ð¾ÑÑÐ¸ ÑÐ¸ÑÑÐµÐ¼Ñ ÑÐ¿ÑÐ°Ð²Ð»ÐµÐ½Ð¸Ñ Ð¿ÑÐ¾ÐµÐºÑÐ°Ð¼Ð¸ Ð² Ð¸Ð½ÑÑÐ¸ÑÑÑÐ°Ñ Ð¿ÑÐ¾ÐµÐºÑÐ¸ÑÐ¾Ð²Ð°Ð½Ð¸Ñ Ð³Ð°Ð·Ð¾Ð²Ð¾Ð¹ Ð¾ÑÑÐ°ÑÐ»Ð¸
title: Ð²ÑÐ¿ÑÑÐºÐ½Ð°Ñ ÐºÐ²Ð°Ð»Ð¸ÑÐ¸ÐºÐ°ÑÐ¸Ð¾Ð½Ð½Ð°Ñ ÑÐ°Ð±Ð¾ÑÐ° Ð¼Ð°Ð³Ð¸ÑÑÑÐ°
titleType: Subtitle
Creators: name: Ð§Ð°Ð¹ÐºÐ¾Ð²ÑÐºÐ¸Ð¹, ÐÐ½Ð´ÑÐµÐ¹
Publisher: name: Ð¡Ð°Ð½ÐºÑ-ÐÐµÑÐµÑÐ±ÑÑÐ³ÑÐºÐ¸Ð¹ Ð¿Ð¾Ð»Ð¸ÑÐµÑÐ½Ð¸ÑÐµÑÐºÐ¸Ð¹ ÑÐ½Ð¸Ð²ÐµÑÑÐ¸ÑÐµÑ ÐÐµÑÑÐ° ÐÐµÐ»Ð¸ÐºÐ¾Ð³Ð¾
Year: 2018
Subjects: ÑÐ¿ÑÐ°Ð²Ð»ÐµÐ½Ð¸Ðµ Ð¿ÑÐ¾ÐµÐºÑÐ°Ð¼Ð¸
Ð¾ÑÐ³Ð°Ð½Ð¸Ð·Ð°ÑÐ¸Ð¾Ð½Ð½Ð°Ñ ÑÑÑÑÐºÑÑÑÐ°
Ð³Ð°Ð·Ð¾Ð²Ð°Ñ Ð¾ÑÑÐ°ÑÐ»Ñ
ÐºÐ¾Ð¼Ð¼ÐµÑÑÐµÑÐºÐ°Ñ Ð¾ÑÐµÐ½ÐºÐ°

description: Ð ÑÐ°Ð±Ð¾ÑÐµ ÑÐ°ÑÑÐ¼Ð¾ÑÑÐµÐ½Ñ Ð¾ÑÐ½Ð¾Ð²Ð½ÑÐµ ÐºÐ¾Ð½ÑÐµÐ¿ÑÐ¸Ð¸ ÑÐ¿ÑÐ°Ð²Ð»ÐµÐ½Ð¸Ñ Ð¿ÑÐ¾ÐµÐºÑÐ½Ð¾Ð¹ Ð´ÐµÑÑÐµÐ»ÑÐ½Ð¾ÑÑÑÑ, Ð¸ÑÑÐ¾ÑÐ¸ÑÐµÑÐºÐ¸Ðµ Ð°ÑÐ¿ÐµÐºÑÑ ÑÐ°Ð·Ð²Ð¸ÑÐ¸Ñ Ð¿ÑÐ¾ÐµÐºÑÐ½Ð¾Ð³Ð¾ ÑÐ¿ÑÐ°Ð²Ð»ÐµÐ½Ð¸Ñ Ð¸ Ð¾ÑÐ³Ð°Ð½Ð¸Ð·Ð°ÑÐ¸Ð¾Ð½Ð½Ð¾Ð¹ ÑÑÑÑÐºÑÑÑÑ ÑÐ¿ÑÐ°Ð²Ð»ÐµÐ½Ð¸Ñ Ð¿ÑÐ¾ÐµÐºÑÐ°Ð¼Ð¸. Ð Ð°Ð·ÑÐ°Ð±Ð¾ÑÐ°Ð½Ð° ÑÐ¸Ð¿Ð¸Ð·Ð°ÑÐ¸Ñ Ð¿ÑÐ¾ÐµÐºÑÐ¾Ð² Ð² Ð¾Ð±Ð»Ð°ÑÑÐ¸ Ð¿ÑÐ¾ÐµÐºÑÐ¸ÑÐ¾Ð²Ð°Ð½Ð¸Ñ. ÐÑÐ¿Ð¾Ð»Ð½ÐµÐ½ Ð°Ð½Ð°Ð»Ð¸Ð· Ð¾ÑÐ³Ð°Ð½Ð¸Ð·Ð°ÑÐ¸Ð¾Ð½Ð½ÑÑ ÑÑÑÑÐºÑÑÑ, ÑÑÑÐµÑÑÐ²ÑÑÑÐ¸Ñ Ð¼ÐµÑÐ¾Ð´Ñ Ð¸Ñ Ð¾Ð¿ÑÐ¸Ð¼Ð¸Ð·Ð°ÑÐ¸Ð¸ Ð¸ Ð¾ÑÐµÐ½ÐºÐ¸ ÑÑÑÐµÐºÑÐ¸Ð²Ð½Ð¾ÑÑÐ¸ Ð²Ð½ÐµÑÐµÐ½Ð½ÑÑ Ð¸Ð·Ð¼ÐµÐ½ÐµÐ½Ð¸Ð¹.
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Ð ÑÐ°Ð±Ð¾ÑÐµ ÑÐ°ÑÑÐ¼Ð¾ÑÑÐµÐ½Ñ 3 Ð²Ð°ÑÐ¸Ð°Ð½ÑÐ° Ð¸Ð½Ð²ÐµÑÑÐ¸ÑÐ¸Ð¾Ð½Ð½Ð¾Ð³Ð¾ Ð¿ÑÐ¾ÐµÐºÑÐ° Ð¿Ð¾ Ð¿Ð¾Ð²ÑÑÐµÐ½Ð¸Ñ ÑÑÑÐµÐºÑÐ¸Ð²Ð½Ð¾ÑÑÐ¸ Ð¿ÑÐ¾ÐµÐºÑÐ½Ð¾Ð³Ð¾ ÑÐ¿ÑÐ°Ð²Ð»ÐµÐ½Ð¸Ñ, Ð¾ÑÐ»Ð¸ÑÐ°ÑÑÐ¸ÐµÑÑ Ð½Ð°Ð±Ð¾ÑÐ¾Ð¼ Ð¼ÐµÑ Ð¸ Ð¾Ð¶Ð¸Ð´Ð°ÐµÐ¼ÑÐ¼ ÑÑÑÐµÐºÑÐ¾Ð¼.
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Millimeter-scale active area superconducting microstrip single-photon detector fabricated by ultraviolet photolithography
Creators: name: Xu, Guang-Zhao
name: Zhang, Wei-Jun
name: You, Li-Xing
name: Wang, Yu-Ze
name: Xiong, Jia-Min
name: Fan, Dong-Hui
name: Wu, Ling
name: Yu, Hui-Qin
name: Li, Hao
name: Wang, Zhen
Publisher: name: arXiv
Year: 2023
Subjects: subject: Instrumentation and Detectors (physics.ins-det)
subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: The effective and convenient detection of single photons via advanced detectors with a large active area is becoming significant for quantum and classical applications. This work demonstrates the fabrication of a superconducting microstrip single-photon detector (SMSPD) with a millimeter-scale active area via the use of ultraviolet (UV) photolithography. The performances of NbN SMSPDs with different active areas and strip widths are characterized. SMSPDs fabricated by UV photolithography and electron beam lithography with small active areas are also compared from the aspects of the switching current density and line edge roughness. Furthermore, an SMSPD with an active area of 1 mm * 1 mm is obtained via UV photolithography, and during operation at 0.85 K, it exhibits near-saturated internal detection efficiency at wavelengths up to 800 nm. At a wavelength of 1550 nm, the detector exhibits a system detection efficiency of ~5% (7%) and a timing jitter of 102 (144) ps, when illuminated with a light spot of ~18 (600) um in diameter, respectively.
description: 13 pages, 5 figures, 1 table
title: ÐÐ½Ð°Ð»Ð¸Ð· ÑÐ¿Ð¾ÑÐ½ÑÑ Ð²Ð¾Ð¿ÑÐ¾ÑÐ¾Ð² ÑÐ°Ð¼Ð¾Ð¶ÐµÐ½Ð½Ð¾Ð³Ð¾ Ð¾ÑÐ¾ÑÐ¼Ð»ÐµÐ½Ð¸Ñ ÑÐ¾Ð²Ð°ÑÐ¾Ð² Ð¿ÑÐ¸ Ð¼ÐµÐ¶Ð´ÑÐ½Ð°ÑÐ¾Ð´Ð½ÑÑ Ð¿ÐµÑÐµÐ²Ð¾Ð·ÐºÐ°Ñ
title: Ð±Ð°ÐºÐ°Ð»Ð°Ð²ÑÑÐºÐ°Ñ ÑÐ°Ð±Ð¾ÑÐ°
titleType: Subtitle
Creators: name: ÐÐ»Ð°Ð´ÐºÐ¾Ð²Ð°, ÐÐ»ÐµÐºÑÐ°Ð½Ð´ÑÐ°
Publisher: name: Ð¡Ð°Ð½ÐºÑ-ÐÐµÑÐµÑÐ±ÑÑÐ³ÑÐºÐ¸Ð¹ Ð¿Ð¾Ð»Ð¸ÑÐµÑÐ½Ð¸ÑÐµÑÐºÐ¸Ð¹ ÑÐ½Ð¸Ð²ÐµÑÑÐ¸ÑÐµÑ ÐÐµÑÑÐ° ÐÐµÐ»Ð¸ÐºÐ¾Ð³Ð¾
Year: 2016
Subjects: ÑÐ°Ð¼Ð¾Ð¶ÐµÐ½Ð½Ð¾Ðµ Ð¾ÑÐ¾ÑÐ¼Ð»ÐµÐ½Ð¸Ðµ
Ð¼ÐµÐ¶Ð´ÑÐ½Ð°ÑÐ¾Ð´Ð½ÑÐµ Ð¿ÐµÑÐµÐ²Ð¾Ð·ÐºÐ¸
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ÑÐ°Ð»ÑÐ´Ð¾
customs clearance
international carriage
import
export
foreign trade turnover
balance

description: Ð Ð±Ð°ÐºÐ°Ð»Ð°Ð²ÑÑÐºÐ¾Ð¹ ÑÐ°Ð±Ð¾ÑÐµ ÑÐ°ÑÐºÑÑÑÐ° Ð¿ÑÐ¾ÑÐµÐ´ÑÑÐ° Ð¾ÑÐ¾ÑÐ¼Ð»ÐµÐ½Ð¸Ñ ÑÐ¾Ð²Ð°ÑÐ¾Ð² Ð¿ÑÐ¸ Ð¼ÐµÐ¶Ð´ÑÐ½Ð°ÑÐ¾Ð´Ð½ÑÑ Ð¿ÐµÑÐµÐ²Ð¾Ð·ÐºÐ°Ñ, Ð¸Ð·Ð»Ð¾Ð¶ÐµÐ½Ñ ÑÐ¿Ð¾ÑÐ½ÑÐµ ÑÐ¸ÑÑÐ°ÑÐ¸Ð¸, Ð²Ð¾Ð·Ð½Ð¸ÐºÐ°ÑÑÐ¸Ðµ Ð² ÑÐ°Ð±Ð¾ÑÐµ Ð¾ÑÐ³Ð°Ð½Ð¸Ð·Ð°ÑÐ¸Ð¹, Ð´Ð°Ð½Ñ ÑÐµÐºÐ¾Ð¼ÐµÐ½Ð´Ð°ÑÐ¸Ð¸ Ð¿Ð¾ Ð¿ÑÐµÐ´Ð¾ÑÐ²ÑÐ°ÑÐµÐ½Ð¸Ñ Ð²Ð¾Ð·Ð½Ð¸ÐºÐ½Ð¾Ð²ÐµÐ½Ð¸Ñ Ð°Ð´Ð¼Ð¸Ð½Ð¸ÑÑÑÐ°ÑÐ¸Ð²Ð½ÑÑ Ð¿ÑÐ°Ð²Ð¾Ð½Ð°ÑÑÑÐµÐ½Ð¸Ð¹ Ð¿ÑÐ¸ ÑÐ°Ð¼Ð¾Ð¶ÐµÐ½Ð½Ð¾Ð¼ Ð¾ÑÐ¾ÑÐ¼Ð»ÐµÐ½Ð¸Ð¸ ÑÐ¾Ð²Ð°ÑÐ¾Ð².
description: In baccalaureate work procedure of registration of goods in case of international carriages is opened, the disputable situations arising in work of the organizations are stated, recommendations about prevention of emergence of administrative offenses in case of a customs clearance of goods are made.
PT-symmetric feedback induced linewidth narrowing
Creators: name: Tang, Yuanjiang
name: Liang, Chao
name: Wen, Xin
name: Li, Weipeng
name: Xu, An-Ning
name: Liu, Yong-Chun
Publisher: name: arXiv
Year: 2023
Subjects: subject: Optics (physics.optics)
subject: Atomic Physics (physics.atom-ph)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Narrow linewidth is a long-pursuing goal in precision measurement and sensing. We propose a parity-time (PT )-symmetric feedback method to narrow the linewidths of resonance systems. By using a quadrature measurement-feedback loop, we transform a dissipative resonance system into a PT-symmetric system. Unlike the conventional PT-symmetric systems which typically require two or more modes, here the PT-symmetric feedback system contains only a single resonance mode, which greatly extends the scope of applications. The method enables remarkable linewidth narrowing and enhancement of measurement sensitivity. We illustrate the concept in a thermal ensemble of atoms, achieving a 48-fold narrowing of the magnetic resonance linewidth. By applying the method in magnetometry, we realize a 22-times improvement of the measurement sensitivity. This work opens the avenue for studying non-Hermitian physics and high-precision measurements in resonance systems with feedback.
description: 5 pages, 5 figures
Chasing the heaviest black holes of jetted Active Galactic Nuclei
Creators: name: Ghisellini, G.
name: Della Ceca, R.
name: Volonteri, M.
name: Ghirlanda, G.
name: Tavecchio, F.
name: Foschini, L.
name: Tagliaferri, G.
name: Haardt, F.
name: Pareschi, G.
name: Grindlay, J.
Publisher: name: arXiv
Year: 2009
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: We investigate the physical properties of the 10 blazars at redshift greater than 2 detected in the 3-years all sky survey performed by the Burst Alert Telescope (BAT) onboard the Swift satellite. We find that the jets of these blazars are among the most powerful known. Furthermore, the mass of their central black hole, inferred from the optical-UV bump, exceeds a few billions of solar masses, with accretion luminosities being a large fraction of the Eddington one. We compare their properties with those of the brightest blazars of the 3-months survey performed by the Large Area Telescope (LAT) onboard the Fermi satellite. We find that the BAT blazars have more powerful jets, more luminous accretion disks and larger black hole masses than LAT blazars. These findings can be simply understood on the basis of the blazar sequence, that suggests that the most powerful blazars have a spectral energy distribution with a high energy peak at MeV (or even sub-MeV) energies. This implies that the most extreme blazars can be found more efficiently in hard X-rays, rather than in the high energy gamma-ray band. We then discuss the implications of our findings for future missions, such as the New Hard X-ray Mission (NHXM) and especially the Energetic X-ray Imaging Survey Telescope (EXIST) mission which, during its planned 2 years all sky survey, is expected to detect thousands of blazars, with a few of them at z greater than 6.
description: Accepted for publication in MNRAS. Absorption due to Lyman-alpha clouds calculated, and optical-UV data de-absorbed. 16 figures, 15 pages
title: Mature students’ perceptions of academic writing experiences at Malawian undergraduate level
Creators: name: Magela, Chimwemwe
Publisher: name: University of Reading
Year: 2022

description: This study takes on a mixed-methods approach in exploring student and lecturer perceptions of academic writing experiences of final year mature-entry undergraduates at the Polytechnic College of the University of Malawi. A questionnaire was completed by 98 final year students of non-English-speaking-background who were enrolled in varied social science, four-year degree programmes. Thirty-five of these students attended retrospective semi-structured interviews. To enable students to talk about their specific experiences of writing different types of texts, several interview questions centred on samples of students’ written work which they had brought along to the interview. Twelve lecturers from the same disciplines as the mature students also completed a questionnaire and attended an interview for further discussion of their questionnaire responses. Several themes emerged from this study regarding mature students’ academic writing experiences. These include gaps between students’ and lecturers’ understanding of writing requirements, ways through which students make sense or increase their understanding of writing requirements and lecturer expectations (e.g. lecturer feedback on written work, interaction and dialogue with fellow students, peer exemplar assignments), factors which exacerbate students’ writing challenges (e.g. lecturers’ assumptions about mature students’ literacy competencies acquired from work and prior study, and mature students’ difficulties in transitioning from professional to academic writing), and recommended support for developing mature students’ academic writing (e.g. student-lecturer dialogue as “pedagogic space”, explicit instruction in academic writing, and increased writing opportunities).
title: Ð Ð°Ð·ÑÐ°Ð±Ð¾ÑÐºÐ° ÑÐµÐºÐ»Ð°Ð¼Ð½Ð¾Ð¹ ÐºÐ°Ð¼Ð¿Ð°Ð½Ð¸Ð¸ ÑÐµÑÐµÐ²Ð¾Ð³Ð¾ ÑÐ¾ÑÐ³Ð¾Ð²Ð¾Ð³Ð¾ Ð¿ÑÐµÐ´Ð¿ÑÐ¸ÑÑÐ¸Ñ (Ð½Ð° Ð¿ÑÐ¸Ð¼ÐµÑÐµ ÐÐ Â«ÐÐµÑÑÐºÐ¸Ð¹ Ð¼Ð¸ÑÂ»)
title: Ð±Ð°ÐºÐ°Ð»Ð°Ð²ÑÑÐºÐ°Ñ ÑÐ°Ð±Ð¾ÑÐ°
titleType: Subtitle
Creators: name: ÐÑÑÐ¾Ð½Ð¸Ð½Ð°, ÐÐ½Ð°ÑÑÐ°ÑÐ¸Ñ
Publisher: name: Ð¡Ð°Ð½ÐºÑ-ÐÐµÑÐµÑÐ±ÑÑÐ³ÑÐºÐ¸Ð¹ Ð¿Ð¾Ð»Ð¸ÑÐµÑÐ½Ð¸ÑÐµÑÐºÐ¸Ð¹ ÑÐ½Ð¸Ð²ÐµÑÑÐ¸ÑÐµÑ ÐÐµÑÑÐ° ÐÐµÐ»Ð¸ÐºÐ¾Ð³Ð¾
Year: 2017
Subjects: Ð¼Ð°ÑÐºÐµÑÐ¸Ð½Ð³
ÑÐµÐºÐ»Ð°Ð¼Ð°
ÐºÐ¾Ð¼Ð¼ÑÐ½Ð¸ÐºÐ°ÑÐ¸Ð¸
Ð°Ð½Ð°Ð»Ð¸Ð·
ÑÑÐ½Ð¾Ðº

description: Ð ÑÐ°Ð¼ÐºÐ°Ñ Ð´Ð°Ð½Ð½Ð¾Ð¹ ÑÐ°Ð±Ð¾ÑÑ Ð¿ÑÐ¾Ð²ÐµÐ´ÐµÐ½Ð¾ Ð¸ÑÑÐ»ÐµÐ´Ð¾Ð²Ð°Ð½Ð¸Ðµ Ð½Ð°ÑÑÐ½Ð¾-ÑÐµÐ¾ÑÐµÑÐ¸ÑÐµÑÐºÐ¸Ñ Ð¾ÑÐ½Ð¾Ð² Ð¾ÑÐ³Ð°Ð½Ð¸Ð·Ð°ÑÐ¸Ð¸ ÑÐµÐºÐ»Ð°Ð¼Ð½Ð¾Ð¹ Ð´ÐµÑÑÐµÐ»ÑÐ½Ð¾ÑÑÐ¸ Ð¿ÑÐµÐ´Ð¿ÑÐ¸ÑÑÐ¸Ñ, Ð¿ÑÐ¾Ð²ÐµÐ´ÐµÐ½ Ð°Ð½Ð°Ð»Ð¸Ð· Ð´ÐµÑÑÐµÐ»ÑÐ½Ð¾ÑÑÐ¸ ÐÐ Â«ÐÐµÑÑÐºÐ¸Ð¹ Ð¼Ð¸ÑÂ», Ð¿ÑÐµÐ´Ð»Ð¾Ð¶ÐµÐ½Ñ Ð¼ÐµÑÐ¾Ð¿ÑÐ¸ÑÑÐ¸Ñ, Ð¾ÑÐ¸ÐµÐ½ÑÐ¸ÑÐ¾Ð²Ð°Ð½Ð½ÑÐµ Ð½Ð° ÑÐ¾Ð²ÐµÑÑÐµÐ½ÑÑÐ²Ð¾Ð²Ð°Ð½Ð¸Ðµ ÑÐµÐºÐ»Ð°Ð¼Ð½Ð¾Ð¹ Ð´ÐµÑÑÐµÐ»ÑÐ½Ð¾ÑÑÐ¸ ÑÐºÐ°Ð·Ð°Ð½Ð½Ð¾Ð¹ Ð¾ÑÐ³Ð°Ð½Ð¸Ð·Ð°ÑÐ¸Ð¸.
Governance Toolkit : A Guide to Nation Building
Creators: name: Wilson-Raybould, Jody, 1971-
name: Raybould, Tim
Publisher: name: The University of British Columbia
Year: 2019

description: The Governance Toolkit is a comprehensive guide intended to assist your Nation in building or rebuilding governance and navigating its way out from under the Indian Act at its own pace and based on its own priorities.
Onthophagus hoepfneri Harold 1869
Creators: name: Kohlmann, Bert
name: Solís, Ángel
Publisher: name: Zenodo
Year: 2025
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Coleoptera
Scarabaeidae
Onthophagus
Onthophagus hoepfneri

description: Onthophagus hoepfneri species group*.
This group is diagnosed by no male head horns present (Fig. 5.14); male protibial apex with some sparse short setae subequal to apical spur (Figs. 1.59 –66); pronotum with a small pointed or rounded anterior-pronotal projection (Fig. 5.14); with coarse punctures in metafemur (Figs. 2.59 –66).
We propose, based on the barcode and morphological analyses, that this species group includes, at present, besides O. hoepfneri Harold, four more species, O. coscineus, Bates, O. oklahomensis Brown, O. pennsylvanicus Harold, and O. tuberculifrons Harold. Using a phylogenetic analysis, Emlen et al. (2005: fig. 2, bootstrap support of 79) had already obtained a branch formed by O. coscineus and O. pennsylvanicus. At the same time, because of the low support values indicated by the maximum-likelihood tree (Fig. 8), more species groups might emerge from the O. hoepfneri branch once more species are included. These maximum-likelihood analyses suggest the existence of at least two clades within this species group, one formed by O. coscineus and O. tuberculifrons, another by O. hoepfneri, O. oklahomensis, and O. pennsylvanicus. More specimens are needed to clarify this situation. Boucomont (1932) placed O. hoepfneri in his “8 e Groupe”, which corresponds to the O. landolti species group, and O. oklahomensis, O. pennsylvanicus, and O. tuberculifrons in his “12 e Groupe”; O. coscineus was unassigned.
The relationship of the O. hoepfneri species group with the O. crinitus species group suggested in this study (Figs. 1–2) was expected. In another maximum-likelihood genetic analysis, Emlen et al. (2005: fig. 4, Bayesian posterior probability of 99) obtained a branch formed by O. crinitus and O. pennsylvanicus. The Emlen et al. (2005) analysis and the present barcode (Figs 1–2) and partition (Fig. 9) analyses suggest a close relationship between these two groups. Schwery & O'Meara (2021) also recovered a mixed O. hoepfneri – O. crinitus clade with a bootstrap support of 9. The O. hoepfneri species group is distributed from the United States of America to Ecuador.
description: Published as part of Kohlmann, Bert & Solís, Ángel, 2025, A review of the species groups of the Western Hemisphere Onthophagus Latreille (Coleoptera: Scarabaeidae: Scarabaeinae) using COI barcoding and gene trees, pp. 401-447 in Zootaxa 5604 (4) on pages 427-428, DOI: 10.11646/zootaxa.5604.4.1, http://zenodo.org/record/15213967
Enhancing Privacy Through DMMA: Decision-Making Model for Authentication
Creators: name: Slavnenko, Maksym
name: Kuchta, Veronika
name: Jeong, Jay
name: Yevhen Zolotavkin
name: Doss, Robin
Publisher: name: figshare
Year: 2021
Subjects: subject: 80303 Computer System Security
subject: FOS: Computer and information sciences
subject: 80402 Data Encryption
subject: 80401 Coding and Information Theory
subject: 80605 Decision Support and Group Support Systems
subject: 80607 Information Engineering and Theory
subject: Information Systems
subject: Computation Theory and Mathematics

description: A number of recently introduced formats for cryptographically protected digital credentials enable privacy preserving Attribute-Based Authentication (ABA) where users obtain total control over the features that are stored and released from Digital Credential Wallets (DCW) based on their choice. This choice implies that the decision-making process is placed solely in the hands of the user, which we demonstrate through our Decision-Making Model for Authentication (DMMA) may result in additional privacy threats pertaining to Relying Party (RP) linking users without their consent. The degree of such malicious activity is measured by the criterion of unlinkability which is synthesized based on the definitions of international standard ISO $27551$ as well as the information theoretic measure of conditional entropy. The DMMA further demonstrates how users may be provided practical recommendations over the optimal selection of credentials for ABA, and suggests how this can be implemented as a feature within DCW. In order to achieve that, the task is formalized as a non-cooperative coordination game where players (targets of the attack) maximize their utilities by using credentials \textit{interchangeably}. The experiment demonstrates that a number of privacy-enhancing equilibria can be achieved under conditions that vary based on the distribution of user attributes as well as other information provided in the game.
Features of incommensurate phases in multiferroics
Creators: name: Gadjiev, Bahruz
Publisher: name: arXiv
Year: 2008
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: We present the results of a theoretical analysis of two-dimensionally modulated incommensurate phases in crystals and define the space distribution of magnetization and polarization vector in the incommensurate phase and demonstrate that their averaging in the incommensurate phase period equals zero. We apply symmetry arguments and show that despite the fact that the phase transition in the system is described by reducible representation of the space group high symmetry phase the superspace symmetry group of the in-commensurate phase contains all symmetry point groups of the high symmetry phase. We analyze the influence of the fractal distribu-tion of defects on the evolution of the incommensurate phase and show that a phase transition occurs in the incommensurate phase that is accompanied by the inversion loss.
Geometric Algebra Model of Distributed Representations
Creators: name: Patyk, Agnieszka
Publisher: name: arXiv
Year: 2010
Subjects: subject: Artificial Intelligence (cs.AI)
subject: FOS: Computer and information sciences

description: Formalism based on GA is an alternative to distributed representation models developed so far --- Smolensky's tensor product, Holographic Reduced Representations (HRR) and Binary Spatter Code (BSC). Convolutions are replaced by geometric products, interpretable in terms of geometry which seems to be the most natural language for visualization of higher concepts. This paper recalls the main ideas behind the GA model and investigates recognition test results using both inner product and a clipped version of matrix representation. The influence of accidental blade equality on recognition is also studied. Finally, the efficiency of the GA model is compared to that of previously developed models.
description: 30 pages, 19 figures
Implementing Microwave Impedance Microscopy in a Dilution Refrigerator
Creators: name: Jiang, Zhanzhi
name: Chong, Su Kong
name: Zhang, Peng
name: Deng, Peng
name: Chu, Shizai
name: Jahanbani, Shahin
name: Wang, Kang Lung
name: Lai, Keji
Publisher: name: arXiv
Year: 2023
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We report the implementation of a dilution-refrigerator-based scanning microwave impedance microscope (MIM) with a base temperature of ~ 100 mK. The vibration noise of our apparatus with tuning-fork feedback control is as low as 1 nm. Using this setup, we have demonstrated the imaging of quantum anomalous Hall states in magnetically (Cr and V) doped (Bi, Sb)2Te3 thin films grown on mica substrates. Both the conductive edge modes and topological phase transitions near coercive fields of Cr-doped and V-doped layers are visualized in the field-dependent results. Our work establishes the experimental platform for investigating nanoscale quantum phenomena under ultralow temperatures.
title: Ð¥Ð¸Ð¼Ð¼Ð¾ÑÐ¾Ð»Ð¾Ð³Ð¸Ñ. Ð¢Ð¾Ð¿Ð»Ð¸Ð²Ð° Ð´Ð»Ñ Ð´Ð²Ð¸Ð³Ð°ÑÐµÐ»ÐµÐ¹ Ð²Ð½ÑÑÑÐµÐ½Ð½ÐµÐ³Ð¾ ÑÐ³Ð¾ÑÐ°Ð½Ð¸Ñ
title: ÑÑÐµÐ±Ð½Ð¾Ðµ Ð¿Ð¾ÑÐ¾Ð±Ð¸Ðµ
titleType: Subtitle
Creators: name: ÐÐ°Ð»ÑÑÐµÐ², Ð®ÑÐ¸Ð¹
name: ÐÐ°Ð¹ÑÐµÐ², ÐÐ»ÐµÐºÑÐµÐ¹
name: Ð¨Ð°Ð±Ð°Ð½Ð¾Ð², ÐÐ»ÐµÐºÑÐ°Ð½Ð´Ñ
Publisher: name: ÐÐ·Ð´-Ð²Ð¾ ÐÐ¾Ð»Ð¸ÑÐµÑÐ½. ÑÐ½-ÑÐ°
Year: 2005
Subjects: ÐÐ¾ÑÐ¾ÑÐ½Ð¾Ðµ ÑÐ¾Ð¿Ð»Ð¸Ð²Ð¾
Ñ Ð¸Ð¼Ð¼Ð¾ÑÐ¾Ð»Ð¾Ð³Ð¸Ñ

description: ÐÑÐ¾Ð°Ð½Ð°Ð»Ð¸Ð·Ð¸ÑÐ¾Ð²Ð°Ð½Ñ ÑÐµÐ½Ð´ÐµÐ½ÑÐ¸Ð¸ Ð²Ð¸Ð´Ð¾Ð¸Ð·Ð¼ÐµÐ½ÐµÐ½Ð¸Ñ Ð¿ÐµÑÐ°ÑÐ½ÑÑ ÑÑÐµÐ´ÑÑÐ² Ð¸Ð½ÑÐ¾ÑÐ¼Ð°ÑÐ¸Ð¸, ÑÐºÐ°Ð·Ð°Ð½Ñ Ð¿ÑÐ¸ÑÐ¸Ð½Ñ Ð·Ð°ÑÐ¾Ð¶Ð´ÐµÐ½Ð¸Ñ Ð¸ ÑÐ°Ð·Ð²Ð¸ÑÐ¸Ñ Ð¾Ð¿ÐµÑÐ°ÑÐ¸Ð²Ð½Ð¾Ð¹ Ð¿Ð¾Ð»Ð¸Ð³ÑÐ°ÑÐ¸Ð¸, Ð¾Ð¿Ð¸ÑÐ°Ð½Ñ ÑÐµÑÐ½Ð¾Ð»Ð¾Ð³Ð¸ÑÐµÑÐºÐ¸Ðµ ÑÑÐµÐ¼Ñ Ð¸ Ð¾Ð±Ð¾ÑÑÐ´Ð¾Ð²Ð°Ð½Ð¸Ðµ Ð´Ð»Ñ ÐµÐµ ÑÐµÐ°Ð»Ð¸Ð·Ð°ÑÐ¸Ð¸. Ð Ð°ÑÑÐ¼Ð¾ÑÑÐµÐ½Ñ ÑÐ¸Ð·Ð¸ÑÐµÑÐºÐ¸Ðµ Ð·Ð°ÐºÐ¾Ð½Ð¾Ð¼ÐµÑÐ½Ð¾ÑÑÐ¸, Ð»ÐµÐ¶Ð°ÑÐ¸Ðµ Ð² Ð¾ÑÐ½Ð¾Ð²Ðµ Ð¿ÑÐ¾ÑÐµÑÑÐ¾Ð² Ð¿ÑÐ¾Ð¸Ð·Ð²Ð¾Ð´ÑÑÐ²Ð° Ð¿ÐµÑÐ°ÑÐ½Ð¾Ð¹ Ð¿ÑÐ¾Ð´ÑÐºÑÐ¸Ð¸ Ð¼ÐµÑÐ¾Ð´Ð°Ð¼Ð¸ Ð¾Ð¿ÐµÑÐ°ÑÐ¸Ð²Ð½Ð¾Ð¹ Ð¿Ð¾Ð»Ð¸Ð³ÑÐ°ÑÐ¸Ð¸. ÐÑÐµÐ´Ð½Ð°Ð·Ð½Ð°ÑÐµÐ½Ð¾ Ð´Ð»Ñ ÑÑÑÐ´ÐµÐ½ÑÐ¾Ð² Ð¸ Ð°ÑÐ¿Ð¸ÑÐ°Ð½ÑÐ¾Ð², Ð¸Ð·ÑÑÐ°ÑÑÐ¸Ñ Ð¿Ð¾Ð»Ð¸Ð³ÑÐ°ÑÐ¸ÑÐµÑÐºÐ¸Ðµ ÑÐµÑÐ½Ð¾Ð»Ð¾Ð³Ð¸Ð¸ Ð¸ Ð¾Ð±Ð¾ÑÑÐ´Ð¾Ð²Ð°Ð½Ð¸Ðµ, ÑÐºÐ¾Ð½Ð¾Ð¼Ð¸ÐºÑ Ð¸ ÑÐ¿ÑÐ°Ð²Ð»ÐµÐ½Ð¸Ðµ Ð¿ÑÐµÐ´Ð¿ÑÐ¸ÑÑÐ¸ÑÐ¼Ð¸ Ð¿Ð¾Ð»Ð¸Ð³ÑÐ°ÑÐ¸ÑÐµÑÐºÐ¾Ð¹ Ð¿ÑÐ¾Ð¼ÑÑÐ»ÐµÐ½Ð½Ð¾ÑÑÐ¸.
description: ÐÐµÑÐ°ÑÐ°ÐµÑÑÑ Ð¿Ð¾ ÑÐµÑÐµÐ½Ð¸Ñ ÑÐµÐ´Ð°ÐºÑÐ¸Ð¾Ð½Ð½Ð¾-Ð¸Ð·Ð´Ð°ÑÐµÐ»ÑÑÐºÐ¾Ð³Ð¾ ÑÐ¾Ð²ÐµÑÐ° Ð¡Ð°Ð½ÐºÑ-ÐÐµÑÐµÑÐ±ÑÑÐ³ÑÐºÐ¾Ð³Ð¾ Ð³Ð¾ÑÑÐ´Ð°ÑÑÑÐ²ÐµÐ½Ð½Ð¾Ð³Ð¾ Ð¿Ð¾Ð»Ð¸ÑÐµÑÐ½Ð¸ÑÐµÑÐºÐ¾Ð³Ð¾ ÑÐ½Ð¸Ð²ÐµÑÑÐ¸ÑÐµÑÐ°.
The Cusp/Core problem and the Secondary Infall Model
Creators: name: Del Popolo, A.
Publisher: name: arXiv
Year: 2009
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: We study the cusp/core problem using a secondary infall model (SIM) that takes into account the effect of ordered and random angular momentum, dynamical friction and baryons adiabatic contraction. The model is applied to structures on galactic scales (normal and dwarfs spiral galaxies) and on clusters of galaxies scales. Our analysis suggest that angular momentum and dynamical friction are able, on galactic scales, to overcome the competing effect of adiabatic contraction eliminating the cusp. The slope of density profile of inner haloes flattens with decreasing halo mass and the profile is well approximated by a Burkert's profile. In order to obtain the NFW profile, starting from the profiles obtained from our model, the magnitude of angular momentum and dynamical friction must be reduced with respect to the values predicted by the model itself. The rotation curves of four LSB galaxies from Gentile et al. (2004) are compared to the rotation curves obtained by the model in the present paper obtaining a good fit to the observational data. The time evolution of the density profile of a galaxy of $10^8-10^9 M_{\odot}$ shows that after a transient steepening, due to the adiabatic contraction, the density profile flattens to $α\simeq 0$. On cluster scales we observe a similar evolution of the dark matter density profile but in this case the density profile slope flattens to $α\simeq 0.6$ for a cluster of $\simeq 10^{14} M_{\odot}$. The total mass profile, differently from that of dark matter, shows a central cusp well fitted by a NFW model.
description: 61 pages; 11 figures; ApJ printed
title: Urban ground-based thermography
Creators: name: Morrison, William
Publisher: name: University of Reading
Year: 2019

description: Urban climates are driven by micro-meteorological processes associated with the complex urban form, materials, and land cover patterns. Given its close link to the surface energy balance, surface temperature observations are key to the improvement and evaluation of models. This work contributes to the application of ground-based thermography in urban settings as an observational method to further our understanding of urban climate processes. In this thesis, ground-based thermography observations are collected and interpreted in a unique way so that they are relatable to scales used by urban climate models and earth observation (EO) satellites. At two measurement sites (simplified outdoor scale model and complex central urban setting), variations in surface temperature are quantitatively linked to micro-scale features such as shadow patterns and material characteristics at unprecedented levels of detail. Previous studies with low level of detail have inferred these properties. The detected upwelling longwave radiation is corrected to surface temperature (Ts) using a novel, high-resolution three-dimensional (3D) radiative transfer (RT) approach. From multi-day observational evaluation, the atmospheric correction has 0.39 K mean absolute error. Ground-based observations are combined with a comprehensive 3D radiative transfer model, enabling detailed simulation of EO land surface temperature (TsEO). For a mainly clear-sky summer day, TsEO at night underestimates the unbiased “complete” surface temperature (Tc) by 0.5 – 1 K, is similar to Tc during morning and evening, and for other times varies significantly with view angle (up to 5.1 K). Generally, view angle variation is smaller than prior studies as they typically use simpler geometry and temperature descriptions, and lack vegetation. Here, the observational basis and high-resolution modelling in a real central urban setting serves as a benchmark for future improvements of simplified model parameterisations.
title: ÐÐ½Ð°Ð»Ð¸Ð· Ð²Ð»Ð¸ÑÐ½Ð¸Ñ ÑÑÐ½ÐºÐ° ÑÐ³Ð»ÐµÐ²Ð¾Ð´Ð¾ÑÐ¾Ð´Ð¾Ð² Ð½Ð° ÑÐºÐ¾Ð½Ð¾Ð¼Ð¸ÑÐµÑÐºÐ¾Ðµ ÑÐ°Ð·Ð²Ð¸ÑÐ¸Ðµ Ð Ð¾ÑÑÐ¸Ð¹ÑÐºÐ¾Ð¹ Ð¤ÐµÐ´ÐµÑÐ°ÑÐ¸Ð¸
title: Ð²ÑÐ¿ÑÑÐºÐ½Ð°Ñ ÐºÐ²Ð°Ð»Ð¸ÑÐ¸ÐºÐ°ÑÐ¸Ð¾Ð½Ð½Ð°Ñ ÑÐ°Ð±Ð¾ÑÐ° Ð±Ð°ÐºÐ°Ð»Ð°Ð²ÑÐ°
titleType: Subtitle
Creators: name: ÐÐ°Ð»ÑÑÐµÐ², ÐÐ²Ð°Ð½
Publisher: name: Ð¡Ð°Ð½ÐºÑ-ÐÐµÑÐµÑÐ±ÑÑÐ³ÑÐºÐ¸Ð¹ Ð¿Ð¾Ð»Ð¸ÑÐµÑÐ½Ð¸ÑÐµÑÐºÐ¸Ð¹ ÑÐ½Ð¸Ð²ÐµÑÑÐ¸ÑÐµÑ ÐÐµÑÑÐ° ÐÐµÐ»Ð¸ÐºÐ¾Ð³Ð¾
Year: 2018
Subjects: Ð½ÐµÑÑÑ
ÑÐºÐ¾Ð½Ð¾Ð¼Ð¸ÐºÐ°
Ð±ÑÐ´Ð¶ÐµÑ
Ð¼Ð°ÐºÑÐ¾ÑÐºÐ¾Ð½Ð¾Ð¼Ð¸ÑÐµÑÐºÐ¸Ðµ Ð¿Ð¾ÐºÐ°Ð·Ð°ÑÐµÐ»Ð¸
Ð¿ÑÐ¸ÑÐ¾Ð´Ð½ÑÐ¹ Ð³Ð°Ð·

description: ÐÐ±ÑÐµÐºÑÐ¾Ð¼ Ð¸ÑÑÐ»ÐµÐ´Ð¾Ð²Ð°Ð½Ð¸Ñ ÑÐ²Ð»ÑÐµÑÑÑ Ð´Ð¸Ð½Ð°Ð¼Ð¸ÐºÐ° ÑÐµÐ½ Ð½Ð° Ð½ÐµÑÑÑ.
Ð ÑÐ°Ð±Ð¾ÑÐµ Ð±ÑÐ»Ð¸ ÑÐ°ÑÑÐ¼Ð¾ÑÑÐµÐ½Ñ ÑÐ°ÐºÐ¸Ðµ Ð²Ð¾Ð¿ÑÐ¾ÑÑ ÐºÐ°Ðº ÑÐµÐ¾ÑÐ¸Ð¸ ÑÐºÐ¾Ð½Ð¾Ð¼Ð¸ÑÐµÑÐºÐ¾Ð³Ð¾ ÑÐ¾ÑÑÐ°, ÑÐµÐ¾ÑÐµÑÐ¸ÑÐµÑÐºÐ¸Ðµ Ð¾ÑÐ½Ð¾Ð²Ñ ÑÐºÐ¾Ð½Ð¾Ð¼Ð¸ÑÐµÑÐºÐ¾Ð³Ð¾ ÑÐ¾ÑÑÐ°, Ð¿ÑÐ¾Ð²ÐµÐ´ÐµÐ½ Ð°Ð½Ð°Ð»Ð¸Ð· Ð´Ð¸Ð½Ð°Ð¼Ð¸ÐºÐ¸ ÑÐµÐ½ Ð½Ð° ÑÐ³Ð»ÐµÐ²Ð¾Ð´Ð¾ÑÐ¾Ð´Ñ Ð·Ð° 2000-2018 Ð³Ð³., Ð¾ÑÐµÐ½ÐµÐ½Ð¾ Ð²Ð»Ð¸ÑÐ½Ð¸Ðµ Ð½ÐµÑÑÑÐ½ÑÑ ÑÐµÐ½ Ð½Ð° Ð¼Ð°ÐºÑÐ¾ÑÐºÐ¾Ð½Ð¾Ð¼Ð¸ÑÐµÑÐºÐ¸Ðµ Ð¿Ð¾ÐºÐ°Ð·Ð°ÑÐµÐ»Ð¸ Ð Ð¤ Ð¸ ÑÐ°ÑÑÐ¼Ð¾ÑÑÐµÐ½Ñ Ð¿ÐµÑÑÐ¿ÐµÐºÑÐ¸Ð²Ñ Ð´Ð°Ð»ÑÐ½ÐµÐ¹ÑÐµÐ³Ð¾ ÑÐ°Ð·Ð²Ð¸ÑÐ¸Ñ ÑÐºÐ¾Ð½Ð¾Ð¼Ð¸ÐºÐ¸ Ð Ð¤.
Annealing of swift heavy ion tracks in amorphous silicon dioxide
Creators: name: Dutt, Shankar
name: Notthoff, Christian
name: Wang, Xue
name: Trautmann, Christina
name: Mota-Santiago, Pablo
name: Kluth, Patrick
Publisher: name: arXiv
Year: 2023
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Applied Physics (physics.app-ph)
subject: FOS: Physical sciences

description: The annealing kinetics of the high energy ion damage in amorphous silicon dioxide (a-SiO2) are still not well understood, despite the material's widespread application in material science, physics, geology, and biology. This study investigates how annealing temperature, duration, and ambient environment affect the recovery of irradiation damage produced along the trajectory of swift heavy ions in a-SiO2. The track-annealing kinetics and the changing ion track morphology were investigated using synchrotron-based small-angle X-ray scattering (SAXS) and etching methods. We found that track annealing proceeds quicker near the sample surface demonstrated by a changing track etch rate as a function of depth. Measurements of ion tracks using SAXS show only small changes in the radial density distribution profile of the ion tracks. Activation energy of the annealing process at different sample depths was determined and the effect of the capping layer during the annealing process was also studied. Combination of oxygen diffusion and stress relaxation may contribute to the observed behaviour of preferential and anisotropic healing of the ion track. The results add to the fundamental understanding of ion track damage recovery and may have direct implications for materials for radioactive waste storage and solid state nanopores.
Limitations of Hall MHD as a model for turbulence in weakly collisional plasmas
Creators: name: Howes, Gregory G.
Publisher: name: arXiv
Year: 2009
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: The limitations of Hall MHD as a model for turbulence in weakly collisional plasmas are explored using quantitative comparisons to Vlasov-Maxwell kinetic theory over a wide range of parameter space. The validity of Hall MHD in the cold ion limit is shown, but spurious undamped wave modes exist in Hall MHD when the ion temperature is finite. It is argued that turbulence in the dissipation range of the solar wind must be one, or a mixture, of three electromagnetic wave modes: the parallel whistler, oblique whistler, or kinetic Alfven waves. These modes are generally well described by Hall MHD. Determining the applicability of linear kinetic damping rates in turbulent plasmas requires a suite of fluid and kinetic nonlinear numerical simulations. Contrasting fluid and kinetic simulations will also shed light on whether the presence of spurious wave modes alters the nonlinear couplings inherent in turbulence and will illuminate the turbulent dynamics and energy transfer in the regime of the characteristic ion kinetic scales.
description: Accepted for publication in Nonlinear Processes in Geophysics, 15 pages, 10 figures
title: ÐÑÐ¾ÐµÐºÑÐ¸ÑÐ¾Ð²Ð°Ð½Ð¸Ðµ, ÑÐµÐ°Ð»Ð¸Ð·Ð°ÑÐ¸Ñ, Ð¿ÑÐ¸Ð¼ÐµÐ½ÐµÐ½Ð¸Ðµ ÑÐ°ÑÐ¿ÑÐµÐ´ÐµÐ»ÐµÐ½Ð½ÑÑ ÑÐ¸ÑÑÐµÐ¼ Ð¼Ð°ÑÐ¸Ð½Ð½Ð¾Ð³Ð¾ Ð¾Ð±ÑÑÐµÐ½Ð¸Ñ
title: Ð±Ð°ÐºÐ°Ð»Ð°Ð²ÑÑÐºÐ°Ñ ÑÐ°Ð±Ð¾ÑÐ°
titleType: Subtitle
Creators: name: ÐÑÐ½ÐµÐ², ÐÐ»Ð°Ð´Ð¸Ð¼Ð¸Ñ
Publisher: name: Ð¡Ð°Ð½ÐºÑ-ÐÐµÑÐµÑÐ±ÑÑÐ³ÑÐºÐ¸Ð¹ Ð¿Ð¾Ð»Ð¸ÑÐµÑÐ½Ð¸ÑÐµÑÐºÐ¸Ð¹ ÑÐ½Ð¸Ð²ÐµÑÑÐ¸ÑÐµÑ ÐÐµÑÑÐ° ÐÐµÐ»Ð¸ÐºÐ¾Ð³Ð¾
Year: 2017
Subjects: ÑÐ°ÑÐ¿ÑÐµÐ´ÐµÐ»ÐµÐ½Ð½ÑÐµ ÑÐ¸ÑÑÐµÐ¼Ñ
ÑÑÐµÐ¼Ð¼Ð¸Ð½Ð³
Ð¿ÑÐ¾Ð³ÑÐ°Ð¼Ð¼Ð½Ð°Ñ ÑÐµÐ°Ð»Ð¸Ð·Ð°ÑÐ¸Ñ

description: ÐÐ°Ð½Ð½Ð°Ñ ÑÐ°Ð±Ð¾ÑÐ° Ð¿Ð¾ÑÐ²ÑÑÐµÐ½Ð° Ð¸ÑÑÐ»ÐµÐ´Ð¾Ð²Ð°Ð½Ð¸Ñ Ð°ÐºÑÑÐ°Ð»ÑÐ½Ð¾ÑÑÐ¸ Ð¸ÑÐ¿Ð¾Ð»ÑÐ·Ð¾Ð²Ð°Ð½Ð¸Ñ ÑÐ°ÑÐ¿ÑÐµÐ´ÐµÐ»ÐµÐ½Ð½ÑÑ ÑÐ¸ÑÑÐµÐ¼ Ð¿ÑÐ¸ Ð¸ÑÐ¿Ð¾Ð»ÑÐ·Ð¾Ð²Ð°Ð½Ð¸Ð¸ Ð¼Ð°ÑÐ¸Ð½Ð½Ð¾Ð¼ Ð¾Ð±ÑÑÐµÐ½Ð¸Ð¸. Ð ÐºÐ°ÑÐµÑÑÐ²Ðµ Ð¿ÑÐ¸Ð¼ÐµÑÐ¾Ð² ÑÐ¸ÑÑÐµÐ¼ ÑÐ°ÑÑÐ¼Ð¾ÑÑÐµÐ½Ñ ÑÐ°ÐºÐ¸Ðµ ÑÑÐµÐ¹Ð¼Ð²Ð¾ÑÐºÐ¸ ÐºÐ°Ðº: Apache Spark, Apache Storm, Apache Hadoop MapReduce. Ð Ð°ÑÑÐ¼Ð¾ÑÑÐµÐ½Ñ Ð¼ÐµÑÐ¾Ð´Ñ ÑÐ°ÑÐ¿ÑÐµÐ´ÐµÐ»ÐµÐ½Ð¸Ñ Ð²ÑÑÐ¸ÑÐ»ÐµÐ½Ð¸Ð¹ ÑÑÐ¸Ñ ÑÐ¸ÑÑÐµÐ¼, Ð¿ÑÐ¾Ð¸Ð·Ð²ÐµÐ´ÐµÐ½Ð¾ ÑÑÐ°Ð²Ð½ÐµÐ½Ð¸Ðµ Ð¸ Ð°Ð½Ð°Ð»Ð¸Ð· ÑÐ¸ÑÑÐµÐ¼. Ð Ð°ÑÑÐ¼Ð¾ÑÑÐµÐ½Ñ Ð½ÐµÐºÐ¾ÑÐ¾ÑÑÐµ Ð¼ÐµÑÐ¾Ð´Ñ Ð¼Ð°ÑÐ¸Ð½Ð½Ð¾Ð³Ð¾ Ð¾Ð±ÑÑÐµÐ½Ð¸Ñ ÑÐ°ÐºÐ¸Ðµ ÐºÐ°Ðº: Ð½Ð°Ð¸Ð²Ð½ÑÐ¹ ÐÐ°Ð¹ÐµÑÐ¾Ð²ÑÐºÐ¸Ð¹ ÐºÐ»Ð°ÑÑÐ¸ÑÐ¸ÐºÐ°ÑÐ¾Ñ, Ð¼ÐµÑÐ¾Ð´ Ðº-ÑÑÐµÐ´Ð½Ð¸Ñ, Ð´ÐµÑÐµÐ²Ð¾ Ð¿ÑÐ¸Ð½ÑÑÐ¸Ñ ÑÐµÑÐµÐ½Ð¸Ð¹, ÑÐ»ÑÑÐ°Ð¹Ð½ÑÐ¹ Ð»ÐµÑ. ÐÑÐµÐ´ÑÑÐ°Ð²Ð»ÐµÐ½Ð¾ ÐºÑÐ°ÑÐºÐ¾Ðµ Ð¾Ð¿Ð¸ÑÐ°Ð½Ð¸Ðµ ÑÐ°Ð±Ð¾ÑÑ Ð¼ÐµÑÐ¾Ð´Ð¾Ð², Ð¸Ñ Ð¾ÑÐ¾Ð±ÐµÐ½Ð½Ð¾ÑÑÐ¸. ÐÑÐµÐ´Ð»Ð¾Ð¶ÐµÐ½Ð° Ð¼ÐµÑÐ¾Ð´Ð¸ÐºÐ° Ð¿ÑÐ¸Ð²ÐµÐ´ÐµÐ½Ð¸Ñ ÑÐµÐºÑÑÐ° Ðº Ð²ÐµÐºÑÐ¾ÑÑ ÑÐ¸ÑÐµÐ», Ð´Ð»Ñ Ð´Ð°Ð»ÑÐ½ÐµÐ¹ÑÐµÐ³Ð¾ Ð°Ð½Ð°Ð»Ð¸Ð·Ð° Ð¼ÐµÑÐ¾Ð´Ð°Ð¼Ð¸ Ð¼Ð°ÑÐ¸Ð½Ð½Ð¾Ð³Ð¾ Ð¾Ð±ÑÑÐµÐ½Ð¸Ñ. Ð¢Ð°Ðº Ð¶Ðµ Ð¿ÑÐ¸Ð²ÐµÐ´ÐµÐ½Ð¾ ÐºÑÐ°ÑÐºÐ¾Ðµ Ð¾Ð¿Ð¸ÑÐ°Ð½Ð¸Ðµ Ð½ÐµÐºÐ¾ÑÐ¾ÑÑÑ Ð¼ÐµÑÐ¾Ð´Ð¾Ð² ÑÑÐµÐ¼Ð¼Ð¸Ð½Ð³Ð° ÑÐ»Ð¾Ð². ÐÑÐ¾Ð¸Ð·Ð²ÐµÐ´ÐµÐ½Ð¾ ÑÑÐ°Ð²Ð½ÐµÐ½Ð¸Ðµ Ð½ÐµÐºÐ¾ÑÐ¾ÑÑÑ ÑÐ¸ÑÑÐµÐ¼ Ð°Ð½Ð°Ð»Ð¸Ð·Ð° Ð´Ð°Ð½Ð½ÑÑ Ð½Ð° ÑÑÐ·Ð²Ð¸Ð¼Ð¾ÑÑÐ¸, ÑÐ´ÐµÐ»Ð°Ð½Ð¾ ÑÑÐ°Ð²Ð½ÐµÐ½Ð¸Ðµ ÑÑÐ¸Ñ ÑÐ¸ÑÑÐµÐ¼. ÐÐ° Ð¾ÑÐ½Ð¾Ð²Ðµ Ð²ÑÐµÑ Ð²ÑÑÐµÐ¿ÐµÑÐµÑÐ¸ÑÐ»ÐµÐ½Ð½ÑÑ Ð´Ð°Ð½Ð½ÑÑ Ð²ÑÐ´Ð²Ð¸Ð½ÑÑÑ ÑÑÐµÐ±Ð¾Ð²Ð°Ð½Ð¸Ñ Ðº ÑÐµÐ°Ð»Ð¸Ð·Ð°ÑÐ¸Ð¸ ÑÐ¸ÑÑÐµÐ¼Ñ Ð°Ð½Ð°Ð»Ð¸Ð·Ð° Ð´Ð°Ð½Ð½ÑÑ Ð½Ð° ÑÑÐ·Ð²Ð¸Ð¼Ð¾ÑÑÐ¸ (frauddetection). ÐÐ»Ñ ÑÐ¸ÑÑÐµÐ¼Ñ frauddetection Ð¾Ð¿Ð¸ÑÐ°Ð½ Ð´ÐµÑÐ°Ð»ÑÐ½ÑÐ¹ Ð´Ð¸Ð·Ð°Ð¹Ð½: Ð¾Ð±ÑÐ°Ñ ÑÑÐµÐ¼Ð° Ð²Ð·Ð°Ð¸Ð¼Ð¾Ð´ÐµÐ¹ÑÑÐ²Ð¸Ñ Ð¼Ð¾Ð´ÑÐ»ÐµÐ¹, Ð¿Ð¾Ð´ÑÐ¾Ð±Ð½Ð¾ Ð¾Ð¿Ð¸ÑÐ°Ð½Ð° Ð²Ð½ÑÑÑÐµÐ½Ð½ÑÑ ÑÐ°Ð±Ð¾ÑÐ° Ð¼Ð¾Ð´ÑÐ»ÐµÐ¹. ÐÐ¿Ð¸ÑÐ°Ð½Ð° ÑÐµÐ°Ð»Ð¸Ð·Ð°ÑÐ¸Ñ Ð¿ÑÐ¾ÑÐ¾ÑÐ¸Ð¿Ð° ÑÐ¸ÑÑÐµÐ¼Ñ Ñ Ð¸ÑÐ¿Ð¾Ð»ÑÐ·Ð¾Ð²Ð°Ð½Ð¸ÐµÐ¼ Apache Camel, Apache Spark. ÐÐ¿Ð¸ÑÐ°Ð½Ð° ÑÐ°Ð±Ð¾ÑÐ° ÐºÐ°Ð¶Ð´Ð¾Ð³Ð¾ ÐºÐ»Ð°ÑÑÐ° ÑÐ¸ÑÑÐµÐ¼Ñ. ÐÐ»Ñ ÑÐ¸ÑÑÐµÐ¼Ñ Ð¿ÑÐµÐ´Ð»Ð¾Ð¶ÐµÐ½Ñ ÑÑÐµÐ½Ð°ÑÐ¸Ð¸ Ð¸ÑÐ¿Ð¾Ð»ÑÐ·Ð¾Ð²Ð°Ð½Ð¸Ñ. ÐÐ° ÑÐµÑÑÐ¾Ð²ÑÑ Ð´Ð°Ð½Ð½ÑÑ ÑÑÐ¿ÐµÑÐ½Ð¾ Ð¿ÑÐ¾ÑÐµÑÑÐ¸ÑÐ¾Ð²Ð°Ð½Ð° ÑÐ°Ð±Ð¾ÑÐ° ÑÐ¸ÑÑÐµÐ¼Ñ.
Two-injection scenario for the hard X-ray excess observed in Mrk 421
Creators: name: Hu, Wen
name: Yan, Da-hai
name: Hu, Qiang-lin
Publisher: name: arXiv
Year: 2023
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: An interesting result recently reported for Mrk 421 is the detection of a significant excess at hard X-ray energies, which could provide useful information for investigating particle acceleration and emission mechanisms in the relativistic jet. Considering a two-injection scenario, we develop a self-consistent one-zone leptonic model to understand the origin of the hard X-ray excess in Mrk 421 during the period of extremely low X-ray and very high energy (VHE) flux in 2013 January. In the model, two populations of mono-energetic ultrarelativistic electrons are injected into the emission region that is a magnetized plasmoid propagating along the blazar jet. We numerically calculate the emitting electron energy distribution by solving a kinetic equation that incorporates both shock acceleration and stochastic acceleration processes. Moreover, we infer analytic expressions relating electrons acceleration, cooling, escape and injection to the observed spectra and variability. For the injection luminosity in particular, we derive a new approximate analytical expression for the case of continual injection with a mono-energetic distribution. Based on a comparison between the theoretical predictions and the observed SED, we conclude that the hard X-ray excess observed in Mrk 421 may be due to the synchrotron radiation emitted by an additional electrons population, which is co-spatial with an electron population producing simultaneous Optical/UV, soft X-ray, and $γ$-ray emissions. The stochastic acceleration may play a major role in producing the observed X-ray spectrum.
description: 12 pages, 4 figures, 2 tables, Accepted for publication in ApJ
DVCS via color dipoles: Nonperturbative effects
Creators: name: Kopeliovich, B. Z.
name: Schmidt, Ivan
name: Siddikov, M.
Publisher: name: arXiv
Year: 2008
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We study the DVCS amplitude within the color dipole approach. The light-cone wave function of a real photon is evaluated in the instanton vacuum model. Our parameter free calculations are able to describe H1 data, both the absolute values and the $t$-dependences, at medium-high values of $Q^{2}$. The $Q^{2}$ dependence is found to be sensitive to the choice of the phenomenological cross section fitted to DIS data.
description: 11 pages; references added, bibliographic inaccuracy corrected
Animação como recurso audiovisual para divulgação científica da paleoparasitologia para crianças
Creators: name: Cascardo, Paula
name: Pucu, Elisa
name: Leles, Daniela
Publisher: name: Zenodo
Year: 2021

description: Apresentação realizada na sessão O meu Póster num minuto da 12ª Conferência Luso-Brasileira de Ciência Aberta, formato híbrido, de 13 a 15 de outubro de 2021.
title: ÐÐ°ÑÐ»Ð°Ð¼ÐµÐ½ÑÑÐºÐ¾Ðµ ÑÐ°ÑÑÐ»ÐµÐ´Ð¾Ð²Ð°Ð½Ð¸Ðµ Ð¤ÐµÐ´ÐµÑÐ°Ð»ÑÐ½Ð¾Ð³Ð¾ Ð¡Ð¾Ð±ÑÐ°Ð½Ð¸Ñ Ð Ð¾ÑÑÐ¸Ð¹ÑÐºÐ¾Ð¹ Ð¤ÐµÐ´ÐµÑÐ°ÑÐ¸Ð¸
title: Ð±Ð°ÐºÐ°Ð»Ð°Ð²ÑÑÐºÐ°Ñ ÑÐ°Ð±Ð¾ÑÐ°
titleType: Subtitle
Creators: name: ÐÐ°Ð²ÑÐ¸Ðº, ÐÐ½Ð°ÑÑÐ°ÑÐ¸Ñ
Publisher: name: Ð¡Ð°Ð½ÐºÑ-ÐÐµÑÐµÑÐ±ÑÑÐ³ÑÐºÐ¸Ð¹ Ð¿Ð¾Ð»Ð¸ÑÐµÑÐ½Ð¸ÑÐµÑÐºÐ¸Ð¹ ÑÐ½Ð¸Ð²ÐµÑÑÐ¸ÑÐµÑ ÐÐµÑÑÐ° ÐÐµÐ»Ð¸ÐºÐ¾Ð³Ð¾
Year: 2017
Subjects: Ð¿Ð°ÑÐ»Ð°Ð¼ÐµÐ½Ñ
Ð¿Ð°ÑÐ»Ð°Ð¼ÐµÐ½ÑÑÐºÐ¸Ð¹ ÐºÐ¾Ð½ÑÑÐ¾Ð»Ñ
Ð¿Ð°ÑÐ»Ð°Ð¼ÐµÐ½ÑÑÐºÐ¸Ðµ ÑÐ°ÑÑÐ»ÐµÐ´Ð¾Ð²Ð°Ð½Ð¸Ñ
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description: Ð Ð´Ð°Ð½Ð½Ð¾Ð¹ Ð²ÑÐ¿ÑÑÐºÐ½Ð¾Ð¹ ÑÐ°Ð±Ð¾ÑÐµ ÑÐ°ÑÑÐ¼Ð°ÑÑÐ¸Ð²Ð°ÐµÑÑÑ Ð¿Ð°ÑÐ»Ð°Ð¼ÐµÐ½ÑÑÐºÐ¾Ðµ ÑÐ°ÑÑÐ»ÐµÐ´Ð¾Ð²Ð°Ð½Ð¸Ðµ Ð¤ÐµÐ´ÐµÑÐ°Ð»ÑÐ½Ð¾Ð³Ð¾ Ð¡Ð¾Ð±ÑÐ°Ð½Ð¸Ñ Ð Ð¾ÑÑÐ¸Ð¹ÑÐºÐ¾Ð¹ Ð¤ÐµÐ´ÐµÑÐ°ÑÐ¸Ð¸. Ð Ð¸Ð¼ÐµÐ½Ð½Ð¾, ÑÐ¿ÐµÑÐ¸ÑÐ¸ÐºÐ° Ð¿ÑÐ¾Ð²ÐµÐ´ÐµÐ½Ð¸Ñ Ð¿Ð°ÑÐ»Ð°Ð¼ÐµÐ½ÑÑÐºÐ¾Ð³Ð¾ ÑÐ°ÑÑÐ»ÐµÐ´Ð¾Ð²Ð°Ð½Ð¸Ñ ÐºÐ°Ðº ÑÐ¾ÑÐ¼Ñ Ð¿Ð°ÑÐ»Ð°Ð¼ÐµÐ½ÑÑÐºÐ¾Ð³Ð¾ ÐºÐ¾Ð½ÑÑÐ¾Ð»Ñ Ð¸ ÑÐ»ÐµÐ¼ÐµÐ½ÑÐ° Ð¼ÐµÑÐ°Ð½Ð¸Ð·Ð¼Ð° Ð·Ð°ÑÐ¸ÑÑ Ð¿ÑÐ°Ð² Ð¸ ÑÐ²Ð¾Ð±Ð¾Ð´ ÑÐµÐ»Ð¾Ð²ÐµÐºÐ° Ð¸ Ð³ÑÐ°Ð¶Ð´Ð°Ð½Ð¸Ð½Ð°. Ð ÑÐ°Ð±Ð¾ÑÐµ Ð¸ÑÑÐ»ÐµÐ´ÑÑÑÑÑ Ð³Ð¾ÑÑÐ´Ð°ÑÑÑÐ²ÐµÐ½Ð½ÑÐµ Ð¾ÑÐ³Ð°Ð½Ñ, Ð¾ÑÑÑÐµÑÑÐ²Ð»ÑÑÑÐ¸Ðµ Ð¿Ð°ÑÐ»Ð°Ð¼ÐµÐ½ÑÑÐºÐ¾Ðµ ÑÐ°ÑÑÐ»ÐµÐ´Ð¾Ð²Ð°Ð½Ð¸Ðµ, Ð¿ÑÐµÐ´Ð¼ÐµÑ Ð¿Ð°ÑÐ»Ð°Ð¼ÐµÐ½ÑÑÐºÐ¾Ð³Ð¾ ÑÐ°ÑÑÐ»ÐµÐ´Ð¾Ð²Ð°Ð½Ð¸Ñ Ð¸ Ð½Ð¾ÑÐ¼Ð°ÑÐ¸Ð²Ð½Ð°Ñ Ð¿ÑÐ°Ð²Ð¾Ð²Ð°Ñ Ð±Ð°Ð·Ð° Ð¿Ð°ÑÐ»Ð°Ð¼ÐµÐ½ÑÑÐºÐ¾Ð³Ð¾ ÑÐ°ÑÑÐ»ÐµÐ´Ð¾Ð²Ð°Ð½Ð¸Ñ Ð¤ÐµÐ´ÐµÑÐ°Ð»ÑÐ½Ð¾Ð³Ð¾ Ð¡Ð¾Ð±ÑÐ°Ð½Ð¸Ñ Ð Ð¾ÑÑÐ¸Ð¹ÑÐºÐ¾Ð¹ Ð¤ÐµÐ´ÐµÑÐ°ÑÐ¸Ð¸. Ð ÑÐ°ÐºÐ¶Ðµ, Ð¿ÑÐ¾Ð²Ð¾Ð´Ð¸ÑÑÑ Ð°Ð½Ð°Ð»Ð¸Ð· Ð¿ÑÐ°ÐºÑÐ¸ÐºÐ¸ Ð¾ÑÑÑÐµÑÑÐ²Ð»ÐµÐ½Ð¸Ñ Ð¿Ð°ÑÐ»Ð°Ð¼ÐµÐ½ÑÑÐºÐ¸Ñ ÑÐ°ÑÑÐ»ÐµÐ´Ð¾Ð²Ð°Ð½Ð¸Ð¹.
Negative powers of Laguerre operators
Creators: name: Nowak, Adam
name: Stempak, Krzysztof
Publisher: name: arXiv
Year: 2009
Subjects: subject: Classical Analysis and ODEs (math.CA)
subject: FOS: Mathematics
subject: 47G40, 31C15, 26A33

description: We study negative powers of Laguerre differential operators in $\R$, $d\ge1$. For these operators we prove two-weight $L^p-L^q$ estimates, with ranges of $q$ depending on $p$. The case of the harmonic oscillator (Hermite operator) has recently been treated by Bongioanni and Torrea by using a straightforward approach of kernel estimates. Here these results are applied in certain Laguerre settings. The procedure is fairly direct for Laguerre function expansions of Hermite type, due to some monotonicity properties of the kernels involved. The case of Laguerre function expansions of convolution type is less straightforward. For half-integer type indices $α$ we transfer the desired results from the Hermite setting and then apply an interpolation argument based on a device we call the {\sl convexity principle} to cover the continuous range of $α\in[-1/2,\infty)^d$. Finally, we investigate negative powers of the Dunkl harmonic oscillator in the context of a finite reflection group acting on $\R$ and isomorphic to $\mathbb Z^d_2$. The two weight $L^p-L^q$ estimates we obtain in this setting are essentially consequences of those for Laguerre function expansions of convolution type.
description: 30 pages