ІСТОРИКО-ПЕДАГОГІЧНІ АСПЕКТИ РОЗВИТКУ ВІТЧИЗНЯНОГО ФІЗИЧНОГО ВИХОВАННЯ (ОСТАННЯ ЧВЕРТЬ ХІХ – ПОЧАТОК ХХ СТ.)

On the basis of a broad textual material carried analіz historical and pedagogical aspects of development of the national physical education during the second half of XIX – early XX century. In particular, uncovered views on physical education P. Lesgaft, his supporters A.Anohin and A.Butovsky. Revealed the methods of physical education, developed by Russian scientists in the period under review. It is noted that while gradually going formation and development of the domestic theory and physical education, which absorbed the elements and foreign copyright gymnastic systems and best practices, theoretical and methodological achievements of domestic authors.В статье на основе широкого текстологического материала осуществлен аналіз историко-педагогических аспектов развития отечественного физического воспитания во второй половине XIX – начале ХХ в. В частности, раскрыты взгляды на физическое воспитание П. Лесгафта, его сторонников А. Анохина и А. Бутовского. Выявлены методы физического воспитания, разработанные отечественными учеными в рассматриваемый период. Отмечено, что в то время постепенно происходило становление и развитие отечественной теории и системы физического воспитания, которые вобрали и элементы зарубежных гимнастических авторских систем, и лучшие методики и теоретико-методические наработки отечественных авторов.У статті на основі широкого текстологічного матеріалу здійснено аналіз історико-педагогічних аспектів розвитку вітчизняного фізичного виховання у другій половині ХІХ – на початку ХХ ст. Зокрема, розкрито погляди на фізичне виховання П. Лесгафта, його прихильників О. Анохіна та О. Бутовського. Виявлено методи фізичного виховання, розроблені вітчизняними вченими у розглядуваний період. Відзначено, що в цей час поступово відбувалося становлення й розвиток вітчизняної теорії й системи фізичного виховання, які увібрали й елементи зарубіжних гімнастичних авторських систем, й кращі методики та теоретико-методичні напрацювання вітчизняних авторів

Millimeter-wave surface impedance of optimally-doped Ba(Fe1-xCox)2As2 single crystals

Precision measurements of active and reactive components of in-plane microwave surface impedance were performed in single crystals of optimally-doped Fe-based superconductor Ba(Fe1-xCox)2As2 (x = 0.074, Tc = 22.8 K). Measurements in a millimeter wavelength range (Ka band, 35-40 GHz) were performed using whispering gallery mode excitations in the ultrahigh quality factor quasioptical sapphire disk resonator with YBa2Cu2O7 superconducting (Tc = 90 K) end plates. The temperature variation of the London penetration depth is best described by a power-law function, delta {\lambda}(T) is proportional to T with the exponent n, n = 2.8, in reasonable agreement with radio-frequency measurements on crystals of the same batch. This power-law dependence is characteristic of a nodeless superconducting gap in the extended s-wave pairing scenario with a strong pair-breaking scattering. The quasiparticle conductivity of the samples, {\sigma}1(T), gradually increases with the decrease of temperature, showing no peak below or at Tc, in notable contrast with the behavior found in the cuprates. The temperature-dependent quasiparticle scattering rate was analyzed in a two-fluid model, assuming the validity of the Drude description of conductivity and generalized expression for the scattering rate. This analysis allows us to estimate the range of the values of a residual surface resistance from 3 to 6 mOhm.Comment: 7 pages, 7 figure

On the determination of the quasiparticle scattering rate in unconventional superconductors by microwave surface impedance

In the approximation of validity of the Drude expression for quasiparticle conductivity and the assumption that all electrons at T = 0 transform into a superfluide condensate, the expression for the quasiparticle scattering rate tau -1 in terms of the real and imaginary parts of the microwave surface impedance has been obtained. The resulting expression is a generalization of the well-known expression for tau^-1, valid for omega x tau is much less 1, to an arbitrary value of omega x tau, where omega is the frequency of the microwave field. From experimental Ka-band impedance measurements, temperature dependence of tau^-1 in superconducting single crystal pnictides Ba(Fe1-xCox)2As2 is obtained using the generalized expression. It is shown that under condition of the given work, the approximation omega x tau is much less 1 gives the considerable error in determination of tau^-1.Comment: 3 pages, 1 figur

Millimeter-wave study of London penetration depth temperature dependence in Ba(Fe0.926Co0.074)2As2 single crystal

In-plane surface Ka-band microwave impedance of optimally doped single crystals of the Fe-based superconductor Ba(Fe0.926Co0.074)2As2 (Tc= 22.8K) was measured. Sensitive sapphire disk quasi-optical resonator with high-Tc cuprate conducting endplates was developed specially for Fe-pnictide superconductors. It allowed finding temperature variation of London penetration depth in a form of power law, namely \Delta \lambda (T)~ Tn with n = 2.8 from low temperatures up to at least 0.6Tc consisted with radio-frequency measurements. This exponent points towards nodeless state with pairbreaking scattering, which can support one of the extended s-pairing symmetries. The dependence \lambda(T) at low temperatures is well described by one superconducting small-gap (\Delta \cong 0.75 in kTc units, where k is Boltzman coefficient) exponential dependence.Comment: 6 pages, 2 figures, to be published in Low Temperature Physics,vol.37, August 201

Cardiosurgical endovascular intervention during pregnancy

Objective. To share the experience of endovascular interventions in pregnant women and women in labor, gained by national team “obstetric cardiology”. Materials and methods. The algorithm of medical support was presented, including the cases of cardiosurgical interventions performance , for pregnant women with critically severe pathology of the heart, which was based on actual recommendations and own experience. Into the clinic of Amosov National Institute of Cardiovascular Surgery during 6.5 yrs (12.2013 - 05.2020) 145 women-patients were admitted to hospital, in 79 of them cardiosurgical intervention was done. Endovascular cardiosurgical operations were performed in 36 patients, and the hybrid - in 2. Urgent and emergency endovascular interventions were performed in 17 women-patients with various terms of pregnancy (15 - 35 weeks) and in 2 women in labor. Conditionally-elective cardiosurgical interventions were performed in 17 women-patients on various terms of pregnancy (as a rule, in II trimester) and in 2 women in labor. In 34 patients the interventions were performed with fetus in utero. Early and late maternal mortality was absent. One «programmed» loss of the fetus have occurred on 12-th week of pregnancy with the inborn heart failure. Modern views on impact of ionized radiation and contrast substances on fetus were presented, and the methods of lowering of their potential harm. Conclusion. There was trusted, that while applying strict indications for performance of endovascular interventions during pregnancy, these methods of diagnosis and treatment are more secure in comparison with «open» operative interventions and may be performed under supervision of experienced multidisciplinary team, taking into account the pregnancy term and the fetus defense

An ambipolar BODIPY derivative for a white exciplex OLED and cholesteric liquid crystal laser toward multifunctional devices

A new interface engineering method is demonstrated for the preparation of an efficient white organic light-emitting diode (WOLED) by embedding an ultrathin layer of the novel ambipolar red emissive compound 4,4-difluoro-2,6-di(4-hexylthiopen-2-yl)-1,3,5,7,8-pentamethyl-4-bora-3a,4a-diaza-s-indacene (bThBODIPY) in the exciplex formation region. The compound shows a hole and electron mobility of 3.3 × 10–4 and 2 × 10–4 cm2 V–1 s–1, respectively, at electric fields higher than 5.3 × 105 V cm–1. The resulting WOLED exhibited a maximum luminance of 6579 cd m–2 with CIE 1931 color coordinates (0.39; 0.35). The bThBODIPY dye is also demonstrated to be an effective laser dye for a cholesteric liquid crystal (ChLC) laser. New construction of the ChLC laser, by which a flat capillary with an optically isotropic dye solution is sandwiched between two dye-free ChLC cells, provides photonic lasing at a wavelength well matched with that of a dye-doped planar ChLC cell

Building Pedagogical Partnership Competence Among Primary School Teachers

The objective of the study was to determine the pedagogical association competence and the methods for its development among primary school teachers. In the investigation, the methods of survey by questionnaire, observation and evaluation of experts were applied. The methods of mathematical statistics were also used to process the results of the data obtained. Results. The general analysis of the research results shows that the majority of primary school teachers have a work experience of 5 to 10 years (35%) and 10 to 15 years (20%). Regarding the pedagogical collaboration with parents, 60% of teachers are involved in it, while 40% are not. However, 70% of teachers involve parents in solving issues related to the education and upbringing of students. conclusions. The study showed that the proposed curriculum was effective in building the pedagogical association competence. Most of the teachers had more than 5 years of work experience, so they had already gained enough experience in upskilling and developing pedagogical partnership strategies. However, according to the results of the work, the proposed training program is highly effective. Perspectives. Future research should focus on studying the effectiveness of the main methods of pedagogical interaction

Solution-processed blue/deep blue and white phosphorescent organic light emitting diodes (PhOLEDs) hosted by a polysiloxane derivative with pendant mCP (1, 3-bis(9-carbazolyl)benzene)

The synthesis and characterization is reported of an efficient polysiloxane derivative containing the 1,3-bis(9-carbazolyl)benzene (mCP) moiety as a pendant unit on the polysiloxane backbone. In comparison with mCP, the mCP-polysiloxane hybrid (PmCPSi) has significantly improved thermal and morphological stabilities with a high decomposition temperature (Td = 523 °C) and glass transition temperature (Tg = 194 °C). The silicon–oxygen linkage of PmCPSi prevents intermolecular π-stacking and ensures a high triplet energy level (ET = 3.0 eV). Using PmCPSi as a host, blue phosphorescent organic light emitting devices (PhOLEDs) effectively confine triplet excitons, with efficient energy transfer to the guest emitter and a relatively low turn-on voltage of 5.8 V. A maximum external quantum efficiency of 9.24% and maximum current efficiency of 18.93 cd/A are obtained. These values are higher than for directly analogous poly(vinylcarbazole) (PVK) based devices (6.76%, 12.29 cd/A). Good color stability over a range of operating voltages is observed. A two-component “warm-white” device with a maximum current efficiency of 10.4 cd/A is obtained using a blend of blue and orange phosphorescent emitters as dopants in PmCPSi host. These results demonstrate that well-designed polysiloxane derivatives are highly efficient hosts suitable for low-cost solution-processed PhOLEDs