Numerical investigation on particle resuspension in turbulent duct flow via DNS-DEM: Effect of collisions

Particle transportation in a fully developed turbulent duct flow is numerically investigated under the effect of wall-normal gravity force. The hydrodynamic modeling of the fluid phase is based on direct numerical simulation. The kinematics and trajectory of the particles as well as the particle-particle interaction are described by the discrete element method (DEM). By using a soft-sphere DEM where the particles and the walls are specified by material properties in the simulation, the effect of collisions on the particle resuspension rate is discussed. The collisions are found to influence on the particle resuspension rate near the duct floor whereas hardly affect the particle behavior near the duct center

Excitation of propagating spin waves with global uniform microwave fields

Copyright © 2011 American Institute of PhysicsWe demonstrate a magnonic architecture that converts global free-space uniform microwaves into spin waves propagating in a stripe magnonic waveguide. The architecture is based upon dispersion mismatch between the narrow magnonic waveguide and a wide "antenna" patch, both patterned from the same magnetic film. The spin waves injected into the waveguide travel to distances as large as several tens of micrometers. The antennas can be placed at multiple positions on a magnonic chip and used to excite mutually coherent multiple spin waves for magnonic logic operations. This demonstration paves way for "magnonics" to become a pervasive technology for information processing

Maximum Entropy Limit of Small-scale Magnetic Field Fluctuations in the Quiet Sun

The observed magnetic field on the solar surface is characterized by a very complex spatial and temporal behavior. Although feature-tracking algorithms have allowed us to deepen our understanding of this behavior, subjectivity plays an important role in the identification and tracking of such features. In this paper, we continue studies Gorobets, A. Y., Borrero, J. M., & Berdyugina, S. 2016, ApJL, 825, L18 of the temporal stochasticity of the magnetic field on the solar surface without relying either on the concept of magnetic features or on subjective assumptions about their identification and interaction. We propose a data analysis method to quantify fluctuations of the line-of-sight magnetic field by means of reducing the temporal field's evolution to the regular Markov process. We build a representative model of fluctuations converging to the unique stationary (equilibrium) distribution in the long time limit with maximum entropy. We obtained different rates of convergence to the equilibrium at fixed noise cutoff for two sets of data. This indicates a strong influence of the data spatial resolution and mixing-polarity fluctuations on the relaxation process. The analysis is applied to observations of magnetic fields of the relatively quiet areas around an active region carried out during the second flight of the Sunrise/IMaX and quiet Sun areas at the disk center from the Helioseismic and Magnetic Imager on board the Solar Dynamics Observatory satellite.Comment: 11 pages, 5 figures, The Astrophysical Journal Supplement Series (accepted

Wannier-Stark ladder spectrum of Bloch oscillations of magneto-dipole spin waves in graded 1D magnonic crystals

This is the author accepted manuscript. The final version is available from AIP Publishing via the DOI in this recordWe have used the method of Wannier functions to calculate the frequencies and profiles of spin waves localised in one-dimensional (1D) magnonic crystals due to a gradient in the bias magnetic field. This localisation of spin waves is analogous to the phenomenon of Bloch oscillations of quantum-mechanical electrons in crystals in a uniform electric field. As a convenient yet realistic model, we consider backward volume magnetostatic spin waves (BVMSWs) in a film of yttriumiron garnet (YIG) in a bias magnetic field comprising spatially uniform, cosine and gradient contributions. The spin-wave spectrum is shown to have the characteristic form of a WannierStark ladder. The analytical results are verified using those obtained using numerical micromagnetic simulations. The physics of spin-wave Bloch oscillations combines the topics of magnonic crystals and graded magnonic index – the two cornerstones of modern magnonics.Engineering and Physical Sciences Research Council (EPSRC)European Union Horizon 202

навчальний посібник

Сучасні проблеми цивільного права та процесу : навч. посіб. / [О. Є. Аврамова, О. І. Антонюк, М. П. Апанасюк та інш.], за ред. Ю. М. Жорнокуя, Л. В. Красицької; МВС України, Харків. нац. ун-т внутр. справ. – Харків : Право, 2017. – 808 с. - ISBN 978-966-937-320-5.У навчальному посібнику розглянуто проблемні питання цивільного права та процесу, зокрема, загальні положення цивільного права та цивільного процесу, суб’єктний склад цивільних та цивільних процесуальних відносин; розкрито основні положення вчення про особисті немайнові права, речове право; проаналізовано особливості правового регулювання відносин, пов’язаних з інтелектуальною, творчою діяльністю; висвітлено проблеми зобов’язального, сімейного та спадкового права; розкрито основні аспекти вчення про цивільні процесуальні відносини, принципи цивільного процесуального права; висвітлено проблемні питання процесуальних строків, перегляду судових рішень та інші актуальні питання сучасної цивілістики. Наведено аналіз теоретичних поглядів з обраної тематики, судової практики, законодавства України та інших країн. Для здобувачів вищої освіти ступенів магістра та доктора філософії, науковців, практикуючих правників, а також усіх, хто цікавиться проблемами цивільного права та процесу.The manual is the result of long-term scientific research and the search of authors in the area of determining the problems of civil law. The authors of the article have studied the characteristics of general provisions of civil law and civil procedure, their parties, objects, the doctrine of personal non-property rights, material law, relations related to intellectual, creative activity, problems of obligatory, family and succession relations, the doctrine of civil procedural relations, the problems of determining the concept, system and content of certain principles of civil procedural law, procedural terms, proving and evidence in the civil procedure, as well as features of reviewing court judgments. An analysis of theoretical views on this topic, court practice, legislation of other countries has been provided. The manual is for students of law educational institutions and MA students, scholars and practitioners, postgraduate students, as well as all those interested in civil law and civil procedure.В учебном пособии рассмотрены проблемные вопросы гражданского права и процесса, в частности, общие положения гражданского права и гражданского процесса, субъектный состав гражданских и гражданских процессуальных отношений; раскрыты основные положения учения о личных неимущественных правах, вещное право, проанализированы особенности правового регулирования отношений, связанных с интеллектуальной, творческой деятельностью; освещены проблемы обязательственного, семейного и наследственного права; раскрыты основные аспекты учения о гражданских процессуальные отношения, принципы гражданского процессуального права; освещены проблемные вопросы процессуальных сроков, пересмотра судебных решений и другие актуальные вопросы современной цивилистики. Приведен анализ теоретических взглядов по выбранной тематике, судебной практики, законодательства Украины и других стран. Для соискателей высшего образования степеней магистра и доктора философии, ученых, практикующих юристов, а также всех, кто интересуется проблемами гражданского права и процесса