1,311 research outputs found

    Lateral imaging of the superconducting vortex lattice using Doppler-modulated scanning tunneling microscopy

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    By spatially mapping the Doppler effect of an in-plane magnetic field on the quasiparticle tunneling spectrum, we have laterally imaged the vortex lattice in superconducting 2H-NbSe2. Cryomagnetic scanning tunneling spectroscopy was performed at 300 mK on the ab-surface oriented parallel to the field H. Conductance images at zero bias show stripe patterns running along H, with the stripe separation varying as H^-0.5. Regions of higher zero-bias conductance show lower gap-edge conductance, consistent with spectral redistribution by spatially-modulated superfluid momentum. Our results are interpreted in terms of the interaction between vortical and screening currents, and demonstrate a general method for probing subsurface vortices.Comment: 3 pages, 3 figures, to appear in Applied Physics Letter

    Effect of angular momentum distribution on gravitational loss-cone instability in stellar clusters around massive BH

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    Small perturbations in spherical and thin disk stellar clusters surrounding massive a black hole are studied. Due to the black hole, stars with sufficiently low angular momentum escape from the system through the loss cone. We show that stability properties of spherical clusters crucially depend on whether the distribution of stars is monotonic or non-monotonic in angular momentum. It turns out that only non-monotonic distributions can be unstable. At the same time the instability in disk clusters is possible for both types of distributions.Comment: 14 pages, 7 figures, submitted to MNRA

    Elliptical motions of stars in close binary systems

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    Motions of stars in close binary systems with a conservative mass exchange are examined. It is shown that Paczynski-Huang model widely used now for obtaining the semi-major axis variation of a relative stars orbit is incorrect, because it brings about large mistakes. A new model suitable for elliptical orbits of stars is proposed. Both of reactive and attractive forces between stars and a substance of the flowing jet are taken into account. A possibility of a mass exchange at presence of accretion disk is considere

    The Radial Orbit Instability in Collisionless N-Body Simulations

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    Using a suite of self-gravitating, collisionless N-body models, we systematically explore a parameter space relevant to the onset and behavior of the radial orbit instability (ROI), whose strength is measured by the systemic axis ratios of the models. We show that a combination of two initial conditions, namely the velocity anisotropy and the virial ratio, determines whether a system will undergo ROI and exactly how triaxial the system will become. A third initial condition, the radial shape of the density profile, plays a smaller, but noticeable role. Regarding the dynamical development of the ROI, the instability a) begins after systems collapse to their most compact configuration and b) evolves fastest when a majority of the particles have radially anisotropic orbits while there is a lack of centrally-concentrated isotropic orbits. We argue that this is further evidence that self-reinforcing torques are the key to the onset of the ROI. Our findings support the idea that a separate orbit instability plays a role in halting the ROI.Comment: accepted for publication in ApJ. 9 figures in emulateapj styl

    Π€Ρ€Π°Π·Π΅ΠΎΠ»ΠΎΠ³ΠΈΠ·ΠΌ ΠΊΠ°ΠΊ особый Ρ‚ΠΈΠΏ тСрминологичСской Π½ΠΎΠΌΠΈΠ½Π°Ρ†ΠΈΠΈ

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    АнализируСтся когнитивная спСцифика Ρ„Ρ€Π°Π·Π΅ΠΎΠ»ΠΎΠ³ΠΈΠ·ΠΌΠΎΠ² Π² сфСрС тСрминологичСской Π½ΠΎΠΌΠΈΠ½Π°Ρ†ΠΈΠΈ, выявляСтся ΡΠΎΠΎΡ‚Π½ΠΎΡˆΠ΅Π½ΠΈΠ΅ Π΄Π°Π½Π½Ρ‹Ρ… Π΅Π΄ΠΈΠ½ΠΈΡ† с Ρ€Π°Π·Π»ΠΈΡ‡Π½Ρ‹ΠΌΠΈ Ρ‚ΠΈΠΏΠ°ΠΌΠΈ знания. ОсобоС Π²Π½ΠΈΠΌΠ°Π½ΠΈΠ΅ удСляСтся ΠΏΡ€ΠΈΡ‡ΠΈΠ½Π°ΠΌ ΠΈ Ρ„Π°ΠΊΡ‚ΠΎΡ€Π°ΠΌ Π²Ρ‹Π±ΠΎΡ€Π° фразСологичСской Π½ΠΎΠΌΠΈΠ½Π°Ρ†ΠΈΠΈ ΠΏΡ€ΠΈ ΠΏΠ΅Ρ€Π΅Π΄Π°Ρ‡Π΅ ΡΠΏΠ΅Ρ†ΠΈΠ°Π»ΡŒΠ½ΠΎΠ³ΠΎ знания. Автор ΡΡ‚Π°Ρ‚ΡŒΠΈ ΡƒΡ‚Π²Π΅Ρ€ΠΆΠ΄Π°Π΅Ρ‚, Ρ‡Ρ‚ΠΎ Ρ‚Π΅Ρ€ΠΌΠΈΠ½-Ρ„Ρ€Π°Π·Π΅ΠΎΠ»ΠΎΠ³ΠΈΠ·ΠΌ Π²Π΅Ρ€Π±Π°Π»ΠΈΠ·ΡƒΠ΅Ρ‚ ΠΊΠΎΠΌΠΏΠ»Π΅ΠΊΡΠ½ΡƒΡŽ ΠΈΠ½Ρ„ΠΎΡ€ΠΌΠ°Ρ†ΠΈΡŽ ΠΎ Π²Π½Π΅ΠΏΠΎΠ»ΠΎΠΆΠ΅Π½Π½ΠΎΠΌ ΠΏΡ€ΠΎΡ„Π΅ΡΡΠΈΠΎΠ½Π°Π»ΡŒΠ½ΠΎΠΌ ΠΎΠ±ΡŠΠ΅ΠΊΡ‚Π΅, воспринятом Π½ΠΎΠΌΠΈΠ½Π°Ρ‚ΠΎΡ€ΠΎΠΌ Π² Π΅Π³ΠΎ нСрасчлСнСнной цСлостности.The article examines the cognitive nature of phraseologisms in terminological nomination, reveals correlation of these units with different types of knowledge. Special attention is paid to the reasons and factors of choosing of phraseological nomination when transmitting special knowledge. The author of the article claims that the term-phraseologism verbalizes comprehensive information about outer professional object, perceived by the nominator in its nonsegmented integrity

    Stability of quantized time-delay nonlinear systems: A Lyapunov-Krasowskii-functional approach

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    Lyapunov-Krasowskii functionals are used to design quantized control laws for nonlinear continuous-time systems in the presence of constant delays in the input. The quantized control law is implemented via hysteresis to prevent chattering. Under appropriate conditions, our analysis applies to stabilizable nonlinear systems for any value of the quantization density. The resulting quantized feedback is parametrized with respect to the quantization density. Moreover, the maximal allowable delay tolerated by the system is characterized as a function of the quantization density.Comment: 31 pages, 3 figures, to appear in Mathematics of Control, Signals, and System

    Π£Π³ΠΎΠ»ΡŒΠ½Ρ‹Π΅ ΠΏΡ€ΠΎΠ΅ΠΊΡ‚Ρ‹ Азиатской России ΠΊΠ°ΠΊ Π΄Ρ€Π°ΠΉΠ²Π΅Ρ€ развития инфраструктуры

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    ΠŸΠΎΠ»ΠΈΡ‚ΠΈΠΊΠ° Π΄Π΅ΠΊΠ°Ρ€Π±ΠΎΠ½ΠΈΠ·Π°Ρ†ΠΈΠΈ ΠΌΠΈΡ€ΠΎΠ²ΠΎΠΉ экономики, рост доступности Π°Π»ΡŒΡ‚Π΅Ρ€Π½Π°Ρ‚ΠΈΠ²Π½Ρ‹Ρ… источников энСргии ΠΈ, ΠΊΠ°ΠΊ слСдствиС, уТСсточСниС ΠΊΠΎΠ½ΠΊΡƒΡ€Π΅Π½Ρ‚Π½ΠΎΠΉ Π±ΠΎΡ€ΡŒΠ±Ρ‹ Π½Π° глобальном Ρ€Ρ‹Π½ΠΊΠ΅ энСргорСсурсов ΡƒΠ²Π΅Π»ΠΈΡ‡ΠΈΠ²Π°ΡŽΡ‚ риски для поставщиков угля, Π² ΠΈΡ… числС Россия β€” Ρ‚Ρ€Π΅Ρ‚ΠΈΠΉ Π² ΠΌΠΈΡ€Π΅ экспортСр этого Π²ΠΈΠ΄Π° Ρ‚ΠΎΠΏΠ»ΠΈΠ²Π°. На основС Ρ€Π°Π·Ρ€Π°Π±ΠΎΡ‚Π°Π½Π½ΠΎΠΉ Π°Π²Ρ‚ΠΎΡ€Π°ΠΌΠΈ Π±Π°Π·Ρ‹ Π΄Π°Π½Π½Ρ‹Ρ… ΠΎΠ± ΡƒΠ³ΠΎΠ»ΡŒΠ½Ρ‹Ρ… ΠΏΡ€ΠΎΠ΅ΠΊΡ‚Π°Ρ… Азиатской России, ΠΏΡ€ΠΎΠ³Ρ€Π°ΠΌΠΌΠ½Ρ‹Ρ… Π΄ΠΎΠΊΡƒΠΌΠ΅Π½Ρ‚ΠΎΠ² ΠΏΠΎ Ρ€Π°Π·Π²ΠΈΡ‚ΠΈΡŽ Ρ‚ΠΎΠΏΠ»ΠΈΠ²Π½ΠΎ-энСргСтичСского комплСкса, Π° Ρ‚Π°ΠΊΠΆΠ΅ ΠΎΡ†Π΅Π½ΠΊΠΈ ΠΏΡ€ΠΎΠ³Π½ΠΎΠ·ΠΎΠ² ΠΌΠΈΡ€ΠΎΠ²ΠΎΠ³ΠΎ Ρ‚ΠΎΠΏΠ»ΠΈΠ²Π½ΠΎΠ³ΠΎ потрСблСния Π°Π²Ρ‚ΠΎΡ€Ρ‹ сформировали собствСнныС сцСнарии развития ΡƒΠ³ΠΎΠ»ΡŒΠ½ΠΎΠΉ отрасли России Π½Π° ΠΏΠ΅Ρ€ΠΈΠΎΠ΄ Π΄ΠΎ 2040 Π³. Они основаны Π½Π° Π½Π΅ΡΠΊΠΎΠ»ΡŒΠΊΠΈΡ… ΠΊΠ»ΡŽΡ‡Π΅Π²Ρ‹Ρ… ΠΌΠΎΠΌΠ΅Π½Ρ‚Π°Ρ…: скорости Π΄Π΅ΠΊΠ°Ρ€Π±ΠΎΠ½ΠΈΠ·Π°Ρ†ΠΈΠΈ, особСнностях энСргСтичСского ΠΏΠ΅Ρ€Π΅Ρ…ΠΎΠ΄Π° ΠΈ Π·Π°Ρ‚Ρ€Π°Ρ‚Π°Ρ…, Π½Π΅ΠΎΠ±Ρ…ΠΎΠ΄ΠΈΠΌΡ‹Ρ… для ΠΈΡ… Ρ€Π΅Π°Π»ΠΈΠ·Π°Ρ†ΠΈΠΈ. Π Π°Π·Ρ€Π°Π±ΠΎΡ‚Π°Π½Ρ‹ Ρ‚Ρ€ΠΈ сцСнария: оптимистичСский, Π±Π°Π·ΠΎΠ²Ρ‹ΠΉ ΠΈ пСссимистичСский. Π‘Π°Π·ΠΎΠ²Ρ‹ΠΉ Π²Π°Ρ€ΠΈΠ°Π½Ρ‚ развития отрасли ΠΏΡ€Π΅Π΄ΠΏΠΎΠ»Π°Π³Π°Π΅Ρ‚, Ρ‡Ρ‚ΠΎ ΠΌΠΈΡ€ΠΎΠ²Ρ‹Π΅ Ρ‚Π΅ΠΌΠΏΡ‹ Π΄Π΅ΠΊΠ°Ρ€Π±ΠΎΠ½ΠΈΠ·Π°Ρ†ΠΈΠΈ Π±ΡƒΠ΄ΡƒΡ‚ сниТСны ΠΈ ΡƒΠ³ΠΎΠ»ΡŒΠ½Π°Ρ энСргСтика Π² Π³ΠΎΡ€ΠΈΠ·ΠΎΠ½Ρ‚Π΅ ΠΌΠΈΠ½ΠΈΠΌΡƒΠΌ Π΄Π²Π°Π΄Ρ†Π°Ρ‚ΠΈ Π»Π΅Ρ‚ сохранит ΠΏΠΎΠ·ΠΈΡ†ΠΈΠΈ Π² энСргСтичСском балансС. РСализация Ρ‚Π°ΠΊΠΎΠ³ΠΎ сцСнария сопровоТдаСтся ΠΊΠ°Ρ€Π΄ΠΈΠ½Π°Π»ΡŒΠ½Ρ‹ΠΌ ΠΏΠΎΠ²Ρ‹ΡˆΠ΅Π½ΠΈΠ΅ΠΌ ΠΏΡ€ΠΎΠΈΠ·Π²ΠΎΠ΄ΠΈΡ‚Π΅Π»ΡŒΠ½ΠΎΡΡ‚ΠΈ Ρ‚Ρ€ΡƒΠ΄Π° ΠΏΡ€ΠΈ условии тСхнологичСской ΠΌΠΎΠ΄Π΅Ρ€Π½ΠΈΠ·Π°Ρ†ΠΈΠΈ основного производства, запуском прСдприятий Π³Π»ΡƒΠ±ΠΎΠΊΠΎΠΉ ΠΏΠ΅Ρ€Π΅Ρ€Π°Π±ΠΎΡ‚ΠΊΠΈ угля, достиТСниСм ΠΌΠΈΡ€ΠΎΠ²Ρ‹Ρ… стандартов Π² области ΠΎΡ…Ρ€Π°Π½Ρ‹ ΠΎΠΊΡ€ΡƒΠΆΠ°ΡŽΡ‰Π΅ΠΉ срСды. ΠŸΡ€ΠΈ этом сохраняСтся экспортная ориСнтация российских ΡƒΠ³ΠΎΠ»ΡŒΠ½Ρ‹Ρ… ΠΏΡ€ΠΎΠ΅ΠΊΡ‚ΠΎΠ² β€” ΠΏΡ€Π΅ΠΆΠ΄Π΅ всСго Π½Π° Ρ€Ρ‹Π½ΠΎΠΊ Азиатско-ВихоокСанского Ρ€Π΅Π³ΠΈΠΎΠ½Π°. Π’Π΅ΠΌ самым создаСтся стимул для дальнСйшСго развития транспортной инфраструктуры Π² Π‘ΠΈΠ±ΠΈΡ€ΠΈ ΠΈ Π½Π° Π”Π°Π»ΡŒΠ½Π΅ΠΌ ВостокС страны, Π° Π³Π»Π°Π²Π½ΠΎΠ΅ β€” ΠΏΠΎΡΠ²Π»ΡΡŽΡ‚ΡΡ пСрспСктивы для комплСксного ΡΠΎΡ†ΠΈΠ°Π»ΡŒΠ½ΠΎ-экономичСского освоСния Π½ΠΎΠ²Ρ‹Ρ… Ρ‚Π΅Ρ€Ρ€ΠΈΡ‚ΠΎΡ€ΠΈΠΉ Π² азиатской части России ΠΈ ΠΏΠΎΠ²Ρ‹ΡˆΠ΅Π½ΠΈΡ качСства ΠΆΠΈΠ·Π½ΠΈ насСлСния, Ρ‡Ρ‚ΠΎ являСтся Π²Π°ΠΆΠ½Ρ‹ΠΌ Ρ„Π°ΠΊΡ‚ΠΎΡ€ΠΎΠΌ ΡΡ‚Π°Π±ΠΈΠ»ΡŒΠ½ΠΎΡΡ‚ΠΈ ΠΏΠΎΠ»ΠΈΡ‚ΠΈΠΊΠΎ-экономичСской систСмы. Π Π΅Π·ΡƒΠ»ΡŒΡ‚Π°Ρ‚Ρ‹ настоящСго исслСдования ΠΌΠΎΠ³ΡƒΡ‚ Π±Ρ‹Ρ‚ΡŒ ΠΈΡΠΏΠΎΠ»ΡŒΠ·ΠΎΠ²Π°Π½Ρ‹ ΠΏΡ€ΠΈ ΠΎΡ†Π΅Π½ΠΊΠ΅ инвСстиционного ΠΈΠΌΠΏΡƒΠ»ΡŒΡΠ° ΠΊΡ€ΡƒΠΏΠ½Ρ‹Ρ… ΠΊΠΎΠΌΠΏΠ»Π΅ΠΌΠ΅Π½Ρ‚Π°Ρ€Π½Ρ‹Ρ… ΠΏΡ€ΠΎΠ΅ΠΊΡ‚ΠΎΠ² развития Азиатской России
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