Evidence of Vortex Jamming in Abrikosov Vortex Flux Flow Regime

We report on dynamics of non-local Abrikosov vortex flow in mesoscopic superconducting Nb channels. Magnetic field dependence of the non-local voltage induced by the flux flow shows that vortices form ordered vortex chains. Voltage asymmetry (rectification) with respect to the direction of vortex flow is evidence that vortex jamming strongly moderates vortex dynamics in mesoscopic geometries. The findings can be applied to superconducting devices exploiting vortex dynamics and vortex manipulation, including superconducting wires with engineered pinning centers.Comment: 5 pages, 3 figure

Stability of enterprises factors of competitiveness

Розглянуто фактори, що впливають на конкурентоспроможність та конкурентостійкість підприємств. Виділено основні з них для оцінки конкурентостійкості підприємства.Factors which influence the competitiveness and competitiveness stability of enterprises are considered. The basic from them are selected for the estimation of competitiveness — stability of enterprise

Socio-economic consequences of military conflicts in the Donetsk region and priority areas of the regional renewal

The socio-economic consequences of military conflicts in the Donetsk region by types of economic activity are analyzed, the state of damaged and restored objects of the infrastructure of Donetsk region as a result of military actions is analyzed, problems of socio-economic development of the Donetsk region are determined, sources for the renewal of social and economic life on the territory of the Donetsk region are analyzed and proposals for the restoration of the Donetsk region territory are developed.Оцінено соціально-економічні наслідки воєнних дій в Донецькій області за видами економічної діяльності, проаналізовано стан пошкоджених та відновлених об’єктів інфраструктури Донецької області внаслідок воєнних дій, визначено проблеми соціально-економічного розвитку Донецької області, проаналізовано джерела для відновлення соціального та економічного життя на території Донецької області та розроблено пропозиції по відновленню території Донецької області.Дана оценка социально-экономических последствий военных действий в Донецкой области по видам экономической деятельности, проанализировано состояние поврежденных и восстановленных объектов инфраструктуры Донецкой области в результате военных действий, определены проблемы социально-экономического развития Донецкой области, проанализированы источники для восстановления социальной и экономической жизни на территории Донецкой области и разработаны предложения по восстановлению территории Донецкой области

Main principles of post-conflict restoration of the economic status of Donbas

In the article main principles of post-conflict restoration of the economic status of Donbas are defined; some macroeconomic indicators are analyzed (Global Competitiveness Index, Index of doing business, Index of Economic Freedom, Investment attractiveness Index) which demonstrate the position of Ukraine in international ratings in recent years; proposals are made to resolve the problems of restoring post-conflict areas.Визначено основні принципи постконфліктного відновлення економічного стану Донбасу, проаналізовано деякі макроекономічні показники (індекс глобальної конкурентоспроможності, індекс ведення бізнесу, індекс економічної свободи, індекс інвестиційної привабливості), які демонструють позицію України в міжнародних рейтингах за останні роки, надано пропозиції щодо вирішення проблем відновлення постконфліктних територій.Определены основные принципы постконфликтного восстановления экономического состояния Донбасса, проанализированы некоторые макроэкономические показатели (индекс глобальной конкурентоспособности, индекс ведения бизнеса, индекс экономической свободы, индекс инвестиционной привлекательности), которые демонстрируют позицию Украины в международных рейтингах за последние годы, даны предложения по решению проблем восстановления постконфликтных территорий

Low-loss Si-based Dielectrics for High Frequency Components of Superconducting Detectors

Silicon-based dielectric is crucial for many superconducting devices, including high-frequency transmission lines, filters, and resonators. Defects and contaminants in the amorphous dielectric and at the interfaces between the dielectric and metal layers can cause microwave losses and degrade device performance. Optimization of the dielectric fabrication, device structure, and surface morphology can help mitigate this problem. We present the fabrication of silicon oxide and nitride thin film dielectrics. We then characterized them using Scanning Electron Microscopy, Atomic Force Microscopy, and spectrophotometry techniques. The samples were synthesized using various deposition methods, including Plasma-Enhanced Chemical Vapor Deposition and magnetron sputtering. The films morphology and structure were modified by adjusting the deposition pressure and gas flow. The resulting films were used in superconducting resonant systems consisting of planar inductors and capacitors. Measurements of the resonator properties, including their quality factor, were performed.Comment: 4 pages, 5 figures, conferenc

Controlling TcT_c of Iridium films using interfacial proximity effects

High precision calorimetry using superconducting transition edge sensors requires the use of superconducting films with a suitable $T_c$, depending on the application. To advance high-precision macrocalorimetry, we require low-$T_c$ films that are easy to fabricate. A simple and effective way to suppress $T_c$ of superconducting Iridium through the proximity effect is demonstrated by using Ir/Pt bilayers as well as Au/Ir/Au trilayers. While Ir/Au films fabricated by applying heat to the substrate during Ir deposition have been used in the past for superconducting sensors, we present results of $T_c$ suppression on Iridium by deposition at room temperature in Au/Ir/Au trilayers and Ir/Pt bilayers in the range of $\sim$20-100~mK. Measurements of the relative impedance between the Ir/Pt bilayers and Au/Ir/Au trilayers fabricated show factor of $\sim$10 higher values in the Ir/Pt case. These new films could play a key role in the development of scalable superconducting transition edge sensors that require low-$T_c$ films to minimize heat capacity and maximize energy resolution, while keeping high-yield fabrication methods.Comment: 5 journal pages, 4 figure

Quasiparticle Generation-Recombination Noise in the Limit of Low Detector Volume

We have measured the quasiparticle generation-recombination (GR) noise in aluminium lumped element kinetic inductors with a wide range of detector volumes at various temperatures. The basic detector consists of meandering inductor and interdigitated capacitor fingers. The inductor volume is varied from 2 to 153 {\mu}m^{3} by changing the inductor width and length to maintain a constant inductance. We started with measuring the power spectrum density (PSD) of the detectors frequency noise which is a function of GR noise and we clearly observed the spectrum roll off at 10 kHz which corresponds to the quasiparticle lifetime. Using data from a temperature sweep of the resonator frequency we convert the frequency fluctuation to quasiparticle fluctuation and observe its strong dependence on detector volume: detectors with smaller volume display less quasiparticle noise amplitude. Meanwhile we observe a saturated quasiparticle density at low temperature from all detectors as the quasiparticle life time {\tau}qp approaches a constant value at low temperature

Strengthening students’ health in the process of sports and health tourism engagement

Is to investigate the level and dynamics of students’ physical health in the process of sports and health tourism engagement.The high level of physical development, functional status and the state of students’ health formed in the process of sports and health tourism will ensure the effectiveness of their learning in higher educational institutions owing to improving their mental and physical performance, as well as help to improve indicators of their life-sustaining and future professional activities