37 research outputs found

    The relationship of citizenship, temperament аnd individual peculiarities of mental processes

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    The description of interrelation of civic consciousness, temperament and specific features of course of mental processes is provided in article on the basis of dynamic functional structure of the identity of K.K. PlatonovВ статье на основе динамической функциональной структуры личности К.К. Платонова приводится описание взаимосвязи гражданственности, темперамента и индивидуальных особенностей протекания психических процессо

    Non-ideality of quantum operations with the electron spin of a 31P donor in a Si crystal due to interaction with a nuclear spin system

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    We examine a 31P donor electron spin in a Si crystal to be used for the purposes of quantum computation. The interaction with an uncontrolled system of 29Si nuclear spins influences the electron spin dynamics appreciably. The hyperfine field at the 29Si nuclei positions is non-collinear with the external magnetic field. Quantum operations with the electron wave function, i.e. using magnetic field pulses or electrical gates, change the orientation of hyperfine field and disturb the nuclear spin system. This disturbance produces a deviation of the electron spin qubit from an ideal state, at a short time scale in comparison with the nuclear spin diffusion time. For H_ext=9 T, the estimated error rate is comparable to the threshold value required by the quantum error correction algorithms. The rate is lower at higher external magnetic fields.Comment: 11 pages, 2 figure

    Methodology of comprehensive assessment of the athlete's adaptive potential to the load

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    The review summarizes the current data on the methods of assessment of adaptation and disadaptation (fatigue, overreaching, overtraining, OT) of athlete during training; special attention is paid to the diagnostic value of biochemical and immunological markers of adaptation potential (AP). Their diagnostic significance was analyzed. Hypotheses and possible mechanisms of OT development were considered. Based on the results of recent studies published by domestic and foreign authors, both the diversity and the number of proposed adaptation markers have been established, and a lack of unity of approaches in the assessment of AP and OT has been revealed. Large amount of biochemical, immunological and other tests proposed for the evaluation of AP was summed up. The most significant AP and OT markers are protein metabolism factors, enzymes, lactate, urea. The role of immune factors, besides leukocytes and lymphocytes, is intensively studied: these are leukocyte toxicity index, level of neutrophils, cytokines, natural antibodies to AP bioregulators. The prospects of using an integrated test system for determining the e-At panel to AP bioregulators is shown for monitoring the athlete's condition, and especially for early diagnosis of OT

    Electron spin coherence exceeding seconds in high purity silicon

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    Silicon is undoubtedly one of the most promising semiconductor materials for spin-based information processing devices. Its highly advanced fabrication technology facilitates the transition from individual devices to large-scale processors, and the availability of an isotopically-purified 28^{28}Si form with no magnetic nuclei overcomes what is a main source of spin decoherence in many other materials. Nevertheless, the coherence lifetimes of electron spins in the solid state have typically remained several orders of magnitude lower than what can be achieved in isolated high-vacuum systems such as trapped ions. Here we examine electron spin coherence of donors in very pure 28^{28}Si material, with a residual 29^{29}Si concentration of less than 50 ppm and donor densities of 10141510^{14-15} per cm3^3. We elucidate three separate mechanisms for spin decoherence, active at different temperatures, and extract a coherence lifetime T2T_2 up to 2 seconds. In this regime, we find the electron spin is sensitive to interactions with other donor electron spins separated by ~200 nm. We apply a magnetic field gradient in order to suppress such interactions and obtain an extrapolated electron spin T2T_2 of 10 seconds at 1.8 K. These coherence lifetimes are without peer in the solid state by several orders of magnitude and comparable with high-vacuum qubits, making electron spins of donors in silicon ideal components of a quantum computer, or quantum memories for systems such as superconducting qubits.Comment: 18 pages, 4 figures, supplementary informatio

    Metal-Substituted Microporous Aluminophosphates

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    This chapter aims to present the zeotypes aluminophosphates (AlPOs) as a complementary alternative to zeolites in the isomorphic incorporation of metal ions within all-inorganic microporous frameworks as well as to discuss didactically the catalytic consequences derived from the distinctive features of both frameworks. It does not intend to be a compilation of either all or the most significant publications involving metal-substituted microporous aluminophosphates. Families of AlPOs and zeolites, which include metal ion-substituted variants, are the dominant microporous materials. Both these systems are widely used as catalysts, in particular through aliovalent metal ions substitution. Here, some general description of the synthesis procedures and characterization techniques of the MeAPOs (metal-contained aluminophosphates) is given along with catalytic properties. Next, some illustrative examples of the catalytic possibilities of MeAPOs as catalysts in the transformation of the organic molecules are given. The oxidation of the hardly activated hydrocarbons has probably been the most successful use of AlPOs doped with the divalent transition metal ions Co2+, Mn2+, and Fe2+, whose incorporation in zeolites is disfavoured. The catalytic role of these MeAPOs is rationalized based on the knowledge acquired from a combination of the most advanced characterization techniques. Finally, the importance of the high specificity of the structure-directing agents employed in the preparation of MeAPOs is discussed taking N,N-methyldicyclohexylamine in the synthesis of AFI-structured materials as a driving force. It is shown how such a high specificity could be predicted and how it can open great possibilities in the control of parameters as critical in catalysis as crystal size, inter-and intracrystalline mesoporosity, acidity, redox properties, incorporation of a great variety of heteroatom ions or final environment of the metal site (surrounding it by either P or Al)

    Development of the system of cadets' civil education at military higher educational institutions

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    В статье излагаются основные положения, явившиеся результатом многолетних авторских исследований. Автор стремился выявить и обсудить центральные проблемы, связанные с воспитанием гражданственности у курсантов высших военных учебных заведений. Большое внимание уделяется процессам гражданского воспитания курсантов, способствующим существенным изменениям в традиционном содержании воспитательных концепций высшей военной школы.The article presents the main ideas that are the result of the author's long-term research. The author tried to reveal and discuss the central problems connected with education of civic consciousness of cadets at military higher educational institutions. Special attention is paid to the processes of cadets' civil education, which contribute to the essential changes in the traditional content of educational concepts of military higher school
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