Magnus force and acoustic Stewart-Tolman effect in type II superconductors

At zero magnetic field we have observed an electromagnetic radiation from superconductors subjected by a transverse elastic wave. This radiation has an inertial origin, and is a manifestation of the acoustic Stewart-Tolman effect. The effect is used for implementing a method of measurement of an effective Magnus force in type II superconductors. The method does not require the flux flow regime and allows to investigate this force for almost the whole range of the existence of the mixed state. We have studied behavior of the gyroscopic force in nonmagnetic borocarbides and Nb. It is found that in borocarbides the sign of the gyroscopic force in the mixed state is the same as in the normal state, and its value (counted for one vortex of unit length) has only a weak dependence on the magnetic field. In Nb the change of sign of the gyroscopic force under the transition from the normal to the mixed state is observed.Comment: 4 pages, 5 figure

Novel inferences of ionisation & recombination for particle/power balance during detached discharges using deuterium Balmer line spectroscopy

The physics of divertor detachment is determined by divertor power, particle and momentum balance. This work provides a novel analysis technique of the Balmer line series to obtain a full particle/power balance measurement of the divertor. This supplies new information to understand what controls the divertor target ion flux during detachment. Atomic deuterium excitation emission is separated from recombination quantitatively using Balmer series line ratios. This enables analysing those two components individually, providing ionisation/recombination source/sinks and hydrogenic power loss measurements. Probabilistic Monte Carlo techniques were employed to obtain full error propagation - eventually resulting in probability density functions for each output variable. Both local and overall particle and power balance in the divertor are then obtained. These techniques and their assumptions have been verified by comparing the analysed synthetic diagnostic 'measurements' obtained from SOLPS simulation results for the same discharge. Power/particle balance measurements have been obtained during attached and detached conditions on the TCV tokamak.Comment: The analysis results of this paper were formerly in arXiv:1810.0496

Possibilities of telemedicine in work to improve survival in multiple trauma victims

Background: World experience in providing medical assistance to victims of trauma indicates high efficiency of telemedicine methods in organization of medical care to trauma victims and an effective and adequate implementation of therapeutic and diagnostic measures. Material and methods: We made some analyses of the necessity of the telemedicine consultation and control in 1150 patients with multisystem injuries which assisted 1000 victims in the medical institutions of the second level and 150 victims in the third level institutions. We studied the necessity for the assistance in the diagnosis, recommendations for treatment, and dynamic control. We explored the effectiveness of telemedicine on the example of 110 patients. Results: The use of telemedicine technology in the process of care in patients with polytrauma is appropriate in medical institutions of the second level. There is a difference between the need and feasibility of telemedicine technology in institutions of the 2nd and the 3rd levels with the second level there is a need for treatment guidelines. The use of telemedicine technology can increase the survival of the affected by 14.5% by optimizing the provision of emergency medical care. Conclusions: Conditions of Ukraine’s health care system, do not allow providing full medical and diagnostic care in all medical institutions of Ukraine. Therefore, there is request to continue consulting practitioners in damage control specialty, dynamics of treatment, as well as providing opportunities to discuss and select the optimal therapeutic and diagnostic management

Sound attenuation in the superconducting amorphous alloy ZrTiCuNiBe

The superconducting energy gap and the parameter of the intensity of electron scattering at two-level systems in amorphous ZrTiCuNiBe are determined from the results of measurements of sound attenuation. The mechanism of adiabatic renormalization of the amplitude of coherent tunneling is used for a quantitative description of the peculiarities of sound absorption in the vicinity of critical temperature.Comment: 4 pages, LaTeX, 2 Postscript figures corrected, submitted to Low Temp. Phy

Stationary waves in a superfluid exciton gas in quantum Hall bilayers

Stationary waves in a superfluid magnetoexciton gas in nu = 1 quantum Hall bilayers are considered. The waves are induced by counter-propagating electrical currents that flow in a system with a point obstacle. It is shown that stationary waves can emerge only in imbalanced bilayers in a certain diapason of currents. It is found that the stationary wave pattern is modified qualitatively under a variation of the ratio of the interlayer distance to the magnetic length d/l. The advantages of use graphene-dielectric-graphene sandwiches for the observation of stationary waves are discussed. We determine the range of parameters (the dielectric constant of the layer that separates two graphene layers and the ratio d/l) for which the state with superfluid magnetoexcitons can be realized in such sandwiches. Typical stationary wave patterns are presented as density plotsComment: 17 pages, 8 figure

Graphene Bilayer Structures with Superfluid Magnetoexcitons

We study superfluid behavior of a gas of spatially indirect magnetoexcitons with reference to a system of two graphene layers embedded in a multilayer dielectric structure. The system is considered as an alternative of a double quantum well in a GaAs haterostructure. We determine a range of parameters (interlayer distance, dielectric constant, magnetic field and gate voltage) where magnetoexciton superfluidity can be achieved. Temperature of superfluid transition is computed. A reduction of critical parameters caused by impurities is evaluated and critical impurity concentration is determined

Досвід ранніх результатів малоінвазійного лікування переломів шийки стегнової кістки у хворих з політравмою за допомогою фіксатора targon fn

Summary. There was conducted A clinical and radiological study of 15 patient’s treatment results for the period of 2014–2015 with duration of observation from 6 months to 1 year. The average age of patients ranged in the range from 30 to 80 years. The nature of fractures in accordance with the classification of AO ASIF, type B1 fractures were in 3 patients, and V2-7, V3- in 5. At the age of 50 years were 9 patients. The results of treatment were assessed as excellent in 50 % of patients, 30 % good and 20 % satisfactory. Poor treatment outcomes were found. The use of mini-invasive osteosynthesis techniques locking Targon FN greatly improve the results of treatment, healing wounds faster verticalization and rehabilitation of patients, in some cases, to minimize the surgical treatment of fractures of the femoral neck with polytrauma.Key words: fracture of the femoral neck, osteosynthesis combined trauma.Резюме. Проведено клінічні та рентгенологічні дослідження результатів лікування 15 хворих за період 2014–2015 року з тривалістю спостереження від 6 місяців до 1 року. Вік хворих в середньому коливався в діапазоні 30–80 років. За характером переломів в відповідності до класифікації AO ASIF, переломи типу В1 були в 3 хворих і В2 – у 7, В3 – у 5-ох. В віці старше 50 років було 9 пацієнтів. Результати лікування оцінено як відмінні у 50 % пацієнтів, у 30 % – добрі та у 20 % – задовільні. Незадовільних результатів лікування не виявлено. Використання малоінвазійної методики остеосинтезу фіксатором Targon FN дозволило значно покращити результати лікування, загоєння рани, швидшої вертикалізації та реабілітації хворих, в окремих випадках і для мінімізації хірургічної тактики переломів шийки стегнової кістки при політравмі.Ключові слова: перелом, шийка стегнової кістки, остеосинтез, поєднана травма