О гипотезах Тэйта для дивизоров на расслоенном многообразии и его общем схемном слое в случае конечной характеристики

We investigate interrelations between the Tate conjecture for divisors on a fibred variety over a finite field and the Tate conjecture for divisors on the generic scheme fibre under the condition that the generic scheme fibre has zero irregularity. Let $\pi:X\to C$ be a surjective morphism of smooth projective varieties over a finite field $F_q$ of characteristic $p$, $C$ is a curve and the generic scheme fibre of $\pi$ is a smooth variety $V$ over the field $k=\kappa(C)$ of rational functions of the curve $C$, $\overline k$ is an algebraic closure of the field $k$, $k^s$ is its separable closure, $NS(V)$ is the N\'eron - Severi group of classes of divisors on the variety $V$ modulo algebraic equivalence, and assume that the following conditions hold: $H^1(V\otimes\overline k,\mathcal O_{V\otimes\,\overline k})=0,$ $NS(V)=NS(V\otimes\overline k).$ If, for a prime number $l$ not dividing ${Card}([NS(V)]_{tors})$ and different from the characteristic of the field $F_q$, the following relation holds $NS(V)\otimes\Bbb Q_l\,\,\widetilde{\rightarrow}\,\,[H^2(V\otimes k^{sep},Q_l(1))]^{Gal( k^{sep}/k)}$ $($in other words, if the Tate conjecture for divisors on $V$ holds$)$, then for any prime number $l\neq charr(F_q)$ the Tate conjecture holds for divisors on $X$: $NS(X)\otimes Q_l\,\,\widetilde{\rightarrow} \,\,[H^2(X\otimes\overline F_q,Q_l(1))]^{Gal(\overline F_q/F_q)}.$ In  particular, it follows from this result that the Tate conjecture for divisors on an arithmetic model of a $K3$ surface over a sufficiently large global field of finite characteristic different from 2 holds as well.В работе изучаются взаимоотношения между гипотезой Тэйта для дивизоров на расслоенном многообразии над конечным полем и гипотезой Тэйта для дивизоров на общем схемном слое при условии, что общий схемный слой имеет иррегулярность нуль. Пусть $\pi:X\to C$ -- сюръективный морфизм гладких проективных многообразий над конечным полем $F_q$ характеристики $p$, $C$ -- кривая, общий схемный слой морфизма $\pi$ является гладким многообразием $V$ над полем $k=\kappa(C)$ рациональных функций кривой $C$, $\overline k$ -- алгебраическое замыкание поля $k$, $k^s$ -- его сепарабельное замыкание, $NS(V)$ -- группа Нерона -- Севери классов дивизоров на многообразии $V$ по модулю алгебраической эквивалентности, причем выполнены следующие условия: $H^1(V\otimes\overline k,\mathcal O_{V\otimes\,\overline k})=0,$ \; $NS(V)=NS(V\otimes\overline k).$ Если для простого числа $l$, не делящего ${Card}([NS(V)]_{tors})$ и отличного от характеристики поля $F_q$, верно соотношение $NS(V)\otimes\Bbb Q_l\,\,\widetilde{\rightarrow}\,\,[H^2(V\otimes k^{sep},Q_l(1))]^{Gal( k^{sep}/k)}$\; $($другими словами, если верна гипотеза Тэйта для дивизоров на $V )$, то для любого простого числа $l\neq charr(F_q)$ гипотеза Тэйта верна для дивизоров на $X$: $NS(X)\otimes Q_l\,\,\widetilde{\rightarrow} \,\,[H^2(X\otimes\overline F_q,Q_l(1))]^{Gal(\overline F_q/ F_q)}.$ В частности, из этого результата следует гипотеза Тэйта для дивизоров на арифметической модели K3 -- поверхности над достаточно большим глобальным полем конечной характеристики, отличной от 2

Pressure dependence of the magnetoresistance oscillations spectrum of beta''-(BEDT-TTF)4(NH4)[Fe(C2O4)3].DMF

The pressure dependence of the interlayer magnetoresistance of the quasi-two dimensional organic metal beta''-(BEDT-TTF)4(NH4)[Fe(C2O4)3].DMF has been investigated up to 1 GPa in pulsed magnetic fields up to 55 T. The Shubnikov-de Haas oscillations spectra can be interpreted on the basis of three compensated orbits in all the pressure range studied, suggesting that the Fermi surface topology remains qualitatively the same as the applied pressure varies. In addition, all the observed frequencies, normalized to their value at ambient pressure, exhibit the same sizeable pressure dependence. Despite this behavior, which is at variance with that of numerous charge transfer salts based on the BEDT-TTF molecule, non-monotonous pressure-induced variations of parameters such as the scattering rate linked to the various detected orbits are observed.Comment: accepted for publication in Phys. Rev.

De Haas-van Alphen oscillations in the compensated organic metal alpha-'pseudo-kappa'-(ET)4H3O[Fe(C2O4)3].(C6H4Br2)

Field-, temperature- and angle-dependent Fourier amplitude of de Haas-van Alphen (dHvA) oscillations are calculated for compensated two-dimensional (2D) metals with textbook Fermi surface (FS) composed of one hole and two electron orbits connected by magnetic breakdown. It is demonstrated that, taking into account the opposite sign of electron and hole orbits, a given Fourier component involves combination of several orbits, the contribution of which must be included in the calculations. Such FS is observed in the strongly 2D organic metal alpha-'pseudo-kappa'-(ET)4H3O[Fe(C2O4)3].(C6H4Br2), dHvA oscillations of which have been studied up to 55 T for various directions of the magnetic field with respect to the conducting plane. Calculations are in good quantitative agreement with the data.Comment: European Physical Journal B (2014

Иноязычные коммуникации в межвоенный период и в период Второй мировой войны

The issues of theory and practice of qualitative foreign language training of the Armed Forces' officers refer to the active military policy of Russia. The purpose of the study is to identify the trends in the development of special language education for strategic intelligence through the development of specialization and professionalization of foreign language communication, on the one hand, and the actualization of attention to the operational and instrumental equipment of foreign language communications, on the other. Methods. Authors compare the Soviet Army experience accumulated between the First and Second World Wars with the current theories of linguistics, general and professional pedagogy. The analysis of existing approaches permits to identify correct, justified and erroneous solutions. Research material include historical documents (acts, laws and regulations, orders, instructions, and reviews), the works of historians, articles, memoirs and recollections. Results. Two different models of language training within professional military education of the Land Forces' officers in the post-war years remain in present day methodic. Conclusions and application. Under similar historical and organizational conditions, the military leadership of the countries engaged in active military construction can use the described positive experience and avoid the mistakes in solving problems of foreign language communication of officers.La cuestión de la gestión de la formación lingüística de los oficiales de las Fuerzas Armadas se ve actualizada en relación con la política militar activa de Rusia. El propósito del estudio es identificar tendencias en el desarrollo de la educación especial en idiomas en interés de la inteligencia estratégica a través del desarrollo de la especialización y profesionalización de la comunicación en idiomas extranjeros; y la actualización de la atención al equipo operativo e instrumental, de comunicaciones en lenguas extranjeras. Los métodos. Al mismo tiempo, la tarea de educación de calidad de los ciudadanos para los idiomas extranjeros en la escuela aún no está resuelta. En estas condiciones, es aconsejable referirse a la experiencia del Ejército Soviético acumulada entre la Primera y la Segunda Guerras Mundiales y compararla con la teoría y práctica actual de las comunicaciones extranjeras. El análisis de los enfoques de la capacitación lingüística de los oficiales permite identificar soluciones correctas, justificadas y erróneas. El material de investigación incluye documentos históricos (actos, leyes y reglamentos, órdenes, instrucciones y reseñas), trabajos de historiadores, artículos, memorias y recuerdos. Los resultados. Dos modelos diferentes de capacitación en idiomas dentro de la educación militar profesional de los oficiales de las Fuerzas Terrestres en los años de la posguerra siguen siendo metódicos en la actualidad. Conclusiones. Al estar en condiciones históricas y organizativas-pedagógicas similares, los líderes militares de los países que participan en la construcción militar activa pueden usar la experiencia positiva descrita y evitar cometer errores al resolver los problemas de comunicación en lenguas extranjeras de los oficiales.Вопрос управления языковой подготовкой офицеров Вооруженных Сил связан с активной военной политикой России. Цель исследования – выявить тенденции развития специального языкового образования в интересах стратегической разведки посредством развития специализации и профессионализации иноязычной коммуникации, с одной стороны, и актуализации внимания к операциональному и инструментальному оснащению иноязычных коммуникаций, с другой. Методология. Авторы сопоставляют опыт Советской Армии, накопленный между Первой и Второй Мировыми войнами с актуальной теорией и практикой иноязычных коммуникаций. Анализ подходов к языковой подготовке офицеров позволяет выявить правильные, оправдавшие себя, а также ошибочные решения. Материалы исследования включают исторические документы (акты, законы и постановления, приказы, инструкции и рецензии), работы историков, статьи, мемуары и воспоминания. Результаты. Две разные модели языковой подготовки в рамках профессионального военного образования офицеров в послевоенные годы остаются используемыми в современной методике, подвергаясь незначительным модификациям. Выводы и практическая значимость. Находясь в сходных исторических и организационно-педагогических условиях, военное руководство стран, осуществляющих активное военное строительство, могут использовать описанный положительный опыт и избежать ошибок в решении вопросов иноязычной коммуникации офицеров

Compliance with corporate governance principles as element of Russian economy investment attractiveness

Over the last few years, the concept of corporate governance in relation to Russian economic realities has been used relatively recently. The concept of corporate governance in the economic practice of Russia was synonymous with production management in 1990-2000 At the same time, "good corporate governance" is a set of activities of public companies in order to ensure high demand for their shares and debt securities from portfolio investors. Corporate governance is a means of trust development both in individual companies and in the stock market of the country as a whole, which is of great importance for long-term investment attraction.  According to various global ratings of the countries (for example, to the rating of the financial conglomerate Morgan Stanley, the Russian stock market is classified as an emerging market that provides increased investment returns. The article attempts to determine the main priorities of institutional investors for corporate governance in Russia. The authors come to the conclusion that the development of the corporate governance system is one of the key factors increasing the investment attractiveness of Russian companies. Government regulators take measures to create corporate governance standards, one example of which is the recommendation to use the Corporate Governance Code approved by the Board of Directors of the Bank of Russia in 2014. In fact, the article highlights both positive and negative trends in the Russian practice of corporate governance. It provides the results of opinion polls among investors, which reveal their motivation to make investment decisions in the Russian market

Environmental Consequences of the Explosion of the Kahovsky Hydroelectric Plant on Biodiversity

The purpose of this article is to determine the ecological consequences of the explosion of the Kakhovka hydroelectric plant (southern Ukraine) on the biological diversity of the region. The main research methods were: theoretical generalization and system-functional approach, analysis, synthesis, expedition method. Results. The ecological consequences of the destruction of a hydroelectric dam are divided into two types: drainage and flooding. As a result of the flooding, 48 objects of the nature reserve fund, with a total area of 120 thousand hectares, were affected. Aquatic biotopes and biotopes characteristic of overmoistened areas were the most affected by drainage. 38 rare types of biotopes, which are under the protection of the Bern Convention, were affected by the ecological disaster; wetlands of international importance (so-called Ramsar) with an area of 33,000 hectares in the Dnipro delta and seven objects of the Emerald network. Perspectives. Prospects for further research are related to the study of biotope restoration after an ecological disaster

Contemporary Issues of Digital Economy and Society. Higher education in an information society environment

The main characteristic of the information society is that the majority of the population is involved in the production of knowledge. The educational level of the person plays a significant role, as the information society places high demands on both the educational level of each individual and the institute of education as a whole. Higher education is a necessary prerequisite for raising the social status and obtaining the personality of the desired place in the modern society. Thus, the center of social organization, the main social institution is the higher school as a center of production, processing and accumulation of knowledge. It should be noted that in the information society, when information becomes of higher value, and the information culture of a person – the determining factor of professional activity, requirements to the higher education system change, there is a significant increase in its status

Changes in systemic GDF15 across the adult lifespan and their impact on maximal muscle power: the Copenhagen Sarcopenia Study

Background Although growth differentiation factor 15 (GDF15) is known to increase with disease and is associated with low physical performance, the role of GDF15 in normal ageing is still not fully understood. Specifically, the influ ence of circulating GDF15 on impairments in maximal muscle power (a major contributor to functional limitations) and the underlying components has not been investigated. Methods Data from 1305 healthy women and men aged 20 to 93 years from The Copenhagen Sarcopenia Study were analysed. Circulating levels of GDF15 and markers of inflammation (tumor necrosis factor-alpha, interleukin-6, and high-sensitivity C-reactive protein) were measured by ELISA (R&D Systems) and multiplex bead-based immunoassays (Bio-Rad). Relative (normalized to body mass), allometric (normalized to height squared), and specific (normalized to leg muscle mass) muscle power were assessed by the Nottingham power rig [leg extension power (LEP)] and the 30 s sit-to-stand (STS) muscle power test. Total body fat, visceral fat, and leg lean mass were assessed by dual energy X-ray absorptiometry. Leg skeletal muscle index was measured as leg lean mass normalized to body height squared. Results Systemic levels of GDF15 increased progressively as a function of age in women (1.1 ± 0.4 pg·mL 1 ·year 1 ) and men (3.3 ± 0.6 pg·mL 1 ·year 1 ) (both P < 0.05). Notably, GDF15 increased at a faster rate from the age of 65 years in women (11.5 ± 1.2 pg·mL 1 ·year 1 , P < 0.05) and 70 years in men (19.3 ± 2.3 pg·mL 1 ·year 1 , P < 0.05), resulting in higher GDF15 levels in men compared with women above the age of 65 years (P < 0.05). Independently of age and circulatory markers of inflammation, GDF15 was negatively correlated to relative STS power (P < 0.05) but not LEP, in both women and men. These findings were mainly explained by negative associations of GDF15 with specific STS power in women and men (both P < 0.05). Conclusions A J-shaped relationship between age and systemic GDF15 was observed, with men at older age showing steeper increases and elevated GDF15 levels compared with women. Importantly, circulating GDF15 was indepen dently and negatively associated with relative STS power, supporting the potential role of GDF15 as a sensitive biomarker of frailty in older people

INTER-CULTURAL DIALOGUE AS A MEANS OF REFLECTING THE AUTHOR’S STANDPOINT IN THE STORY MERRY GERTRUDE BY Y. BUYDA

The essay based on the analysis of the story Merry Gertrude by contemporary author Y. Buyda addresses the forms and functions of inter-cultural dialogue as a means of re-flections of the author's standpoint.Publikacja dofinansowana przez Wydział Filologiczny Uniwersytetu Łódzkieg