12 research outputs found

    Российский Π°Π²Ρ‚ΠΎΠΏΡ€ΠΎΠΌ: антикризисноС Ρ€Π΅Π³ΡƒΠ»ΠΈΡ€ΠΎΠ²Π°Π½ΠΈΠ΅ ΠΈ пСрспСктивы развития

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    To overcome the effects of financial and economic crisis the governments of different countries use various and, as a rule, very expensive tools. Therefore, an analytical review of government measures to overcome the global financial crisis’ consequences with marking of the most successful as well as ineffective economic tools that were used to support the automotive industry in the developed countries and Russia seems to be very important.Для прСодолСния послСдствий финансово-экономичСских кризисов ΠΏΡ€Π°Π²ΠΈΡ‚Π΅Π»ΡŒΡΡ‚Π²Π° Ρ€Π°Π·Π½Ρ‹Ρ… стран ΠΏΡ€ΠΈΠ±Π΅Π³Π°ΡŽΡ‚ ΠΊ использованию Ρ€Π°Π·Π»ΠΈΡ‡Π½Ρ‹Ρ…, ΠΊΠ°ΠΊ ΠΏΡ€Π°Π²ΠΈΠ»ΠΎ, вСсьма дорогостоящих инструмСнтов. ΠŸΠΎΡΡ‚ΠΎΠΌΡƒ аналитичСский ΠΎΠ±Π·ΠΎΡ€ дСйствий ΠΏΡ€Π°Π²ΠΈΡ‚Π΅Π»ΡŒΡΡ‚Π² ΠΏΠΎ ΠΏΡ€Π΅ΠΎΠ΄ΠΎΠ»Π΅Π½ΠΈΡŽ послСдствий ΠΌΠΈΡ€ΠΎΠ²ΠΎΠ³ΠΎ финансово-экономичСского кризиса с Π²Ρ‹Π΄Π΅Π»Π΅Π½ΠΈΠ΅ΠΌ ΠΊΠ°ΠΊ Π½Π°ΠΈΠ±ΠΎΠ»Π΅Π΅ ΡƒΠ΄Π°Ρ‡Π½Ρ‹Ρ…, Ρ‚Π°ΠΊ ΠΈ нСэффСктивных экономичСских инструмСнтов, ΠΊΠΎΡ‚ΠΎΡ€Ρ‹Π΅ использовались для ΠΏΠΎΠ΄Π΄Π΅Ρ€ΠΆΠΊΠΈ Π°Π²Ρ‚ΠΎΠΌΠΎΠ±ΠΈΠ»ΡŒΠ½ΠΎΠΉ ΠΏΡ€ΠΎΠΌΡ‹ΡˆΠ»Π΅Π½Π½ΠΎΡΡ‚ΠΈ Π² Ρ€Π°Π·Π²ΠΈΡ‚Ρ‹Ρ… странах ΠΈ Π² России, прСдставляСтся вСсьма Π°ΠΊΡ‚ΡƒΠ°Π»ΡŒΠ½Ρ‹ΠΌ

    Quantum Arnol'd Diffusion in a Simple Nonlinear System

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    We study the fingerprint of the Arnol'd diffusion in a quantum system of two coupled nonlinear oscillators with a two-frequency external force. In the classical description, this peculiar diffusion is due to the onset of a weak chaos in a narrow stochastic layer near the separatrix of the coupling resonance. We have found that global dependence of the quantum diffusion coefficient on model parameters mimics, to some extent, the classical data. However, the quantum diffusion happens to be slower that the classical one. Another result is the dynamical localization that leads to a saturation of the diffusion after some characteristic time. We show that this effect has the same nature as for the studied earlier dynamical localization in the presence of global chaos. The quantum Arnol'd diffusion represents a new type of quantum dynamics and can be observed, for example, in 2D semiconductor structures (quantum billiards) perturbed by time-periodic external fields.Comment: RevTex, 11 pages including 12 ps-figure

    Detectors of charged particles and low-energy gamma-quanta on the basis of Ticor single crystals

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    Scintillation characteristics have been studied for detectors of charged particles and low-energy gamma-quanta produced on the basis of Ticor single crystals.Π£ Ρ€ΠΎΠ±ΠΎΡ‚Ρ– прСдставлСні Ρ€Π΅Π·ΡƒΠ»ΡŒΡ‚Π°Ρ‚ΠΈ Π΄ΠΎΡΠ»Ρ–Π΄ΠΆΠ΅Π½ΡŒ сцинтиляційних характСристик Π΄Π΅Ρ‚Π΅ΠΊΡ‚ΠΎΡ€Ρ–Π² зарядТСних часток Ρ– Π½ΠΈΠ·ΡŒΠΊΠΎΠ΅Π½Π΅Ρ€Π³Π΅Ρ‚ΠΈΡ‡Π½ΠΈΡ… Π³Π°ΠΌΠΌΠ°-ΠΊΠ²Π°Π½Ρ‚Ρ–Π² Π½Π° основі кристалів Ρ‚Ρ–ΠΊΠΎΡ€Ρƒ.Π’ Ρ€Π°Π±ΠΎΡ‚Π΅ прСдставлСны Ρ€Π΅Π·ΡƒΠ»ΡŒΡ‚Π°Ρ‚Ρ‹ исслСдований сцинтилляционных характСристик Π΄Π΅Ρ‚Π΅ΠΊΡ‚ΠΎΡ€ΠΎΠ² заряТСнных частиц ΠΈ низкоэнСргСтичСских Π³Π°ΠΌΠΌΠ°-ΠΊΠ²Π°Π½Ρ‚ΠΎΠ² Π½Π° основС кристаллов Ρ‚ΠΈΠΊΠΎΡ€Π°

    Over-reflection in lab: the all-sufficient cause of instability of an annular supersonic shear in simulations on free-surface shallow water

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    Presented are results of the pioneering research on the over-reflection instability of an annular β€˜supersonic’ shear in experiments on free-surface shallow water covering a differentially rotating and properly shaped bottom (characteristic waves on shallow water play the role of sound, all alternative shear instabilities are suppressed due to specificity of the rotation profile and experimental procedure). The consideration focuses upon distinctive features of the structures generated by the instability as perturbations of shallow-water thickness. The features of the structures observed are compared with those predicted by an original theory. The structures are also readily interpreted as a superposition of Huygens-Mach fronts that are multiply over-reflected from the shear, having been induced by a supersonic disturbance moving along it. Owing to the annular geometry, the instability in the experiments develops even in absence of external boundaries that are universally included in traditional theoretical schemes for feedback necessary for the wave generation

    Nonwoven polycaprolactone scaffolds for tissue engineering: The choice of the structure and the method of cell seeding

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    Nonwoven polycaprolactone materials produced by electrospinning are perspective internal prosthetic implants. Seeding these implants with multipotent mesenchymal stromal cells stimulates the replacement of the prosthesis with recipient's own connective tissue. Electrospinning method was used for producing polycaprolactone matrices differing in thickness, pore diameter, fiber size, and biomechanical properties. Labeled cells were seeded on scaffolds in three ways: (1) static, (2) dynamic, and (3) directed flow of the cell suspension generated by capillary action. Cell distribution on the surface and the interior of the scaffolds was studied; the metabolic activity of cells was measured by MTT assay. Static seeding method yielded fully confluence of cells covered the entire scaffold surface, but the cells were located primarily in the upper third of the matrix. Dynamic method proved to be effective only for scaffolds of thickness greater than 500 microns, irrespective of the pore diameter. The third method was effective only for scaffolds with the pore diameter of 20-30 microns, regardless of the material thickness. Resorbable nonwoven polycaprolactone electrospun materials have appropriate biomechanical properties and similar to native tissue matrix structures for internal prosthesis. The choice of the most effective cell seeding method depends on the spatial characteristics - the material thickness, pore diameter, and fibers size, which are determined by the electrospinning conditions

    НСтканыС ΠΌΠ°Ρ‚Π΅Ρ€ΠΈΠ°Π»Ρ‹ Π½Π° основС ΠΏΠΎΠ»ΠΈΠΊΠ°ΠΏΡ€ΠΎΠ»Π°ΠΊΡ‚ΠΎΠ½Π° для Ρ‚ΠΊΠ°Π½Π΅Π²ΠΎΠΉ ΠΈΠ½ΠΆΠ΅Π½Π΅Ρ€ΠΈΠΈ: Π²Ρ‹Π±ΠΎΡ€ структуры ΠΈ способа засСлСния

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    Nonwoven polycaprolactone materials produced by electrospinning are perspective internal prosthetic implants. Seeding these implants with multipotent mesenchymal stromal cells stimulates the replacement of the prosthesis with recipient's own connective tissue. Electrospinning method was used for producing polycaprolactone matrices differing in thickness, pore diameter, fiber size, and biomechanical properties. Labeled cells were seeded on scaffolds in three ways: (1) static, (2) dynamic, and (3) directed flow of the cell suspension generated by capillary action. Cell distribution on the surface and the interior of the scaffolds was studied; the metabolic activity of cells was measured by MTT assay. Static seeding method yielded fully confluence of cells covered the entire scaffold surface, but the cells were located primarily in the upper third of the matrix. Dynamic method proved to be effective only for scaffolds of thickness greater than 500 microns, irrespective of the pore diameter. The third method was effective only for scaffolds with the pore diameter of 20-30 microns, regardless of the material thickness. Resorbable nonwoven polycaprolactone electrospun materials have appropriate biomechanical properties and similar to native tissue matrix structures for internal prosthesis. The choice of the most effective cell seeding method depends on the spatial characteristics - the material thickness, pore diameter, and fibers size, which are determined by the electrospinning conditions.НСтканыС ΠΌΠ°Ρ‚Π΅Ρ€ΠΈΠ°Π»Ρ‹ Π½Π° основС ΠΏΠΎΠ»ΠΈΠΊΠ°ΠΏΡ€ΠΎΠ»Π°ΠΊΡ‚ΠΎΠ½Π°, ΠΏΠΎΠ»ΡƒΡ‡Π΅Π½Π½Ρ‹Π΅ ΠΌΠ΅Ρ‚ΠΎΠ΄ΠΎΠΌ элСктроформования, ΡΠ²Π»ΡΡŽΡ‚ΡΡ пСрспСктивными ΠΈΠΌΠΏΠ»Π°Π½Ρ‚Π°Ρ‚Π°ΠΌΠΈ для эндопротСзирования. ЗасСлСниС Ρ‚Π°ΠΊΠΈΡ… ΠΈΠΌΠΏΠ»Π°Π½Ρ‚Π°Ρ‚ΠΎΠ² ΠΌΡƒΠ»ΡŒΡ‚ΠΈΠΏΠΎΡ‚Π΅Π½Ρ‚Π½Ρ‹ΠΌΠΈ ΠΌΠ΅Π·Π΅Π½Ρ…ΠΈΠΌΠ°Π»ΡŒΠ½Ρ‹ΠΌΠΈ ΡΡ‚Ρ€ΠΎΠΌΠ°Π»ΡŒΠ½Ρ‹ΠΌΠΈ ΠΊΠ»Π΅Ρ‚ΠΊΠ°ΠΌΠΈ способствуСт Π·Π°ΠΌΠ΅Ρ‰Π΅Π½ΠΈΡŽ ΠΏΡ€ΠΎΡ‚Π΅Π·Π° собствСнной ΡΠΎΠ΅Π΄ΠΈΠ½ΠΈΡ‚Π΅Π»ΡŒΠ½ΠΎΠΉ Ρ‚ΠΊΠ°Π½ΡŒΡŽ Ρ€Π΅Ρ†ΠΈΠΏΠΈΠ΅Π½Ρ‚Π°. ЦСлью настоящСго исслСдования являлось сравнСниС эффСктивности Ρ‚Ρ€Π΅Ρ… ΠΌΠ΅Ρ‚ΠΎΠ΄ΠΎΠ² засСлСния ΠΊΠ»Π΅Ρ‚ΠΊΠ°ΠΌΠΈ Π½Π΅Ρ‚ΠΊΠ°Π½Ρ‹Ρ… носитСлСй Π½Π° основС ΠΏΠΎΠ»ΠΈΠΊΠ°ΠΏΡ€ΠΎΠ»Π°ΠΊΡ‚ΠΎΠ½Π°, ΠΎΠ±Π»Π°Π΄Π°ΡŽΡ‰ΠΈΡ… Ρ€Π°Π·Π»ΠΈΡ‡Π½Ρ‹ΠΌΠΈ пространствСнными характСристиками. ΠœΠ΅Ρ‚ΠΎΠ΄ΠΎΠΌ элСктроформования Π±Ρ‹Π»ΠΈ ΠΏΠΎΠ»ΡƒΡ‡Π΅Π½Ρ‹ Ρ‚Ρ€ΠΈ ΠΎΠ±Ρ€Π°Π·Ρ†Π° ΠΏΠΎΠ»ΠΈΠΊΠ°ΠΏΡ€ΠΎΠ»Π°ΠΊΡ‚ΠΎΠ½ΠΎΠ²Ρ‹Ρ… ΠΌΠ°Ρ‚Ρ€ΠΈΡ†, ΠΎΡ‚Π»ΠΈΡ‡Π°ΡŽΡ‰ΠΈΡ…ΡΡ Ρ‚ΠΎΠ»Ρ‰ΠΈΠ½ΠΎΠΉ, Π΄ΠΈΠ°ΠΌΠ΅Ρ‚Ρ€ΠΎΠΌ ΠΏΠΎΡ€ ΠΈ Π²ΠΎΠ»ΠΎΠΊΠΎΠ½, биомСханичСскими свойствами. ЗасСлСниС носитСлСй ΠΌΠ΅Ρ‡Π΅Π½Ρ‹ΠΌΠΈ ΠΌΡƒΠ»ΡŒΡ‚ΠΈΠΏΠΎΡ‚Π΅Π½Ρ‚Π½Ρ‹ΠΌΠΈ ΠΌΠ΅Π·Π΅Π½Ρ…ΠΈΠΌΠ°Π»ΡŒΠ½Ρ‹ΠΌΠΈ ΡΡ‚Ρ€ΠΎΠΌΠ°Π»ΡŒΠ½Ρ‹ΠΌΠΈ ΠΊΠ»Π΅Ρ‚ΠΊΠ°ΠΌΠΈ ΠΏΡƒΠΏΠΎΡ‡Π½ΠΎΠ³ΠΎ ΠΊΠ°Π½Π°Ρ‚ΠΈΠΊΠ° ΠΏΡ€ΠΎΠ²ΠΎΠ΄ΠΈΠ»ΠΈ трСмя способами: статичным, динамичСским ΠΈ ΠΌΠ΅Ρ‚ΠΎΠ΄ΠΎΠΌ с использованиСм капиллярного эффСкта. ΠžΡ†Π΅Π½ΠΈΠ²Π°Π»ΠΈ распрСдСлСниС ΠΊΠ»Π΅Ρ‚ΠΎΠΊ ΠΏΠΎ повСрхности ΠΈ Ρ‚ΠΎΠ»Ρ‰ΠΈΠ½Π΅ ΠΎΠ±Ρ€Π°Π·Ρ†ΠΎΠ², ΠΌΠ΅Ρ‚Π°Π±ΠΎΠ»ΠΈΡ‡Π΅ΡΠΊΡƒΡŽ Π°ΠΊΡ‚ΠΈΠ²Π½ΠΎΡΡ‚ΡŒ ΠΊΠ»Π΅Ρ‚ΠΎΠΊ измСряли с ΠΏΠΎΠΌΠΎΡ‰ΡŒΡŽ МВВ-тСста. Π‘Ρ‚Π°Ρ‚ΠΈΡ‡Π½Ρ‹ΠΉ ΠΌΠ΅Ρ‚ΠΎΠ΄ ΠΏΠΎΠ·Π²ΠΎΠ»ΠΈΠ» ΠΏΠΎΠ»ΡƒΡ‡ΠΈΡ‚ΡŒ носитСли с Ρ€Π°Π²Π½ΠΎΠΌΠ΅Ρ€Π½Ρ‹ΠΌ ΠΏΠΎΠΊΡ€Ρ‹Ρ‚ΠΈΠ΅ΠΌ повСрхности, ΠΎΠ΄Π½Π°ΠΊΠΎ ΠΊΠ»Π΅Ρ‚ΠΊΠΈ Π² основном Ρ€Π°ΡΠΏΠΎΠ»Π°Π³Π°Π»ΠΈΡΡŒ Π² Π²Π΅Ρ€Ρ…Π½Π΅ΠΉ Ρ‚Ρ€Π΅Ρ‚ΠΈ матрикса. ДинамичСский ΠΌΠ΅Ρ‚ΠΎΠ΄ оказался эффСктивСн Ρ‚ΠΎΠ»ΡŒΠΊΠΎ для носитСлСй Ρ‚ΠΎΠ»Ρ‰ΠΈΠ½ΠΎΠΉ Π±ΠΎΠ»Π΅Π΅ 500 ΠΌΠΊΠΌ, нСзависимо ΠΎΡ‚ Π΄ΠΈΠ°ΠΌΠ΅Ρ‚Ρ€Π° ΠΏΠΎΡ€. ΠœΠ΅Ρ‚ΠΎΠ΄ засСлСния с использованиСм капиллярного эффСкта Π±Ρ‹Π» эффСктивСн Ρ‚ΠΎΠ»ΡŒΠΊΠΎ для носитСлСй с Π΄ΠΈΠ°ΠΌΠ΅Ρ‚Ρ€ΠΎΠΌ ΠΏΠΎΡ€ 20-30 ΠΌΠΊΠΌ, нСзависимо ΠΎΡ‚ Ρ‚ΠΎΠ»Ρ‰ΠΈΠ½Ρ‹ ΠΌΠ°Ρ‚Π΅Ρ€ΠΈΠ°Π»Π°. Π‘ΠΈΠΎΡ€Π΅Π·ΠΎΡ€Π±ΠΈΡ€ΡƒΠ΅ΠΌΡ‹Π΅ Π½Π΅Ρ‚ΠΊΠ°Π½Ρ‹Π΅ ΠΌΠ°Ρ‚Π΅Ρ€ΠΈΠ°Π»Ρ‹ Π½Π° основС ΠΏΠΎ-Π»ΠΈΠΊΠ°ΠΏΡ€ΠΎΠ»Π°ΠΊΡ‚ΠΎΠ½Π°, ΠΏΠΎΠ»ΡƒΡ‡Π΅Π½Π½Ρ‹Π΅ ΠΌΠ΅Ρ‚ΠΎΠ΄ΠΎΠΌ элСктроформования, ΠΎΠ±Π»Π°Π΄Π°ΡŽΡ‚ подходящими биомСханичСскими свойствами для выполнСния пластики Π΄Π΅Ρ„Π΅ΠΊΡ‚ΠΎΠ² стСнок Π±Ρ€ΡŽΡˆΠ½ΠΎΠΉ полости, ΠΈΠΌΠ΅ΡŽΡ‚ сходноС с матриксом Π½Π°Ρ‚ΠΈΠ²Π½ΠΎΠΉ Ρ‚ΠΊΠ°Π½ΠΈ строСниС. Π’Ρ‹Π±ΠΎΡ€ Π½Π°ΠΈΠ±ΠΎΠ»Π΅Π΅ эффСктивного ΠΌΠ΅Ρ‚ΠΎΠ΄Π° засСлСния носитСлСй ΠΊΠ»Π΅Ρ‚ΠΊΠ°ΠΌΠΈ зависит ΠΎΡ‚ Π΅Π³ΠΎ пространствСнных характСристик - Ρ‚ΠΎΠ»Ρ‰ΠΈΠ½Ρ‹ ΠΌΠ°Ρ‚Π΅Ρ€ΠΈΠ°Π»Π°, Π΄ΠΈΠ°ΠΌΠ΅Ρ‚Ρ€Π° ΠΏΠΎΡ€ ΠΈ Π²ΠΎΠ»ΠΎΠΊΠΎΠ½, ΠΊΠΎΡ‚ΠΎΡ€Ρ‹Π΅, Π² свою ΠΎΡ‡Π΅Ρ€Π΅Π΄ΡŒ, ΠΎΠΏΡ€Π΅Π΄Π΅Π»ΡΡŽΡ‚ΡΡ условиями элСктроформования ΠΌΠ°Ρ‚Π΅Ρ€ΠΈΠ°Π»Π°
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