456 research outputs found

    Fast forward evolution in heat equation:Tunable heat transport in adiabatic regime

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    We consider the problem of fast forward evolution of the processes described in terms of the heat equation. The matter is considered on an adiabatically expanding time-dependent box. Attention is paid to acceleration of heat transfer processes. So called shortcuts to adiabaticity, implying fast forwarding of the adiabatic states are studied. Heat flux and temperature profiles are analyzed for standard and fast forwarded regimes

    The formation of Tatars ethnic groups in the southern Urals and trans Urals region

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    The formation of the Tatar people and the Tatar nation occurred at the basin of the middle current of the Volga and the bottom current of the Kama rivers. The authors examine the evolutionary nature of the formation of the Tatar ethnic group on the basis of ethnographic, historical and linguistic data. Linguistic data enable us to refine the process of settlement of the Tatar tribes in the study region. The authors conducted an expedition to the places of compact residence of Tatars, they revealed new folklore materials about the time of the Tatars in this or that region. These materials make it possible to make adjustments to substantiate the formation of the Tatar ethnic group

    OSCILLATIONS pH IN THE Salt – H2O – OH– SYSTEMS

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    The synthesis of Thin films by using thioamides and salts at the presence of alkali is usually carried out by mixing the two solutions. The first solution (A) contains the salt and alkali and the second thioamide (B).Before mixing, the solutions could be in the state which sufficiently far from true equilibrium that may lead to irreproducible results after mixing the solutions.The deviation from the true equilibrium is determined by the “memory” effects of solution and the possibility of the system state at the “oscillation mode”, in addition to the above effects, the film properties depend on the concentration of reactants and temperature solutions.Thus, study of state of the solution A before mixing with the solution B at beginning of kinetic process of formation lead sulfide is interesting to achieve reproducible results in the synthesis of films PbS

    Ultrafast photoinduced phase separation dynamics in Pr(0.6)Ca(0.4)MnO(3) thin films

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    The time resolved Magnetooptical Kerr effect in the substrate-strain-induced insulating ferromagnetic phase in (Pr0.6_{0.6}Ca0.4_{0.4})MnO3_3 thin films on two different substrates was measured in a magnetic field up to 1.1T. The photoinduced Kerr rotation and ellipticity show remarkably different magnetic-field dependence. From the comparison of the magnetic field dependencies of the photoinduced and static Kerr rotation and ellipticity we conclude that a transient ferromagnetic metallic phase, embedded within the insulating ferromagnetic phase, is created upon the photoexcitation at low temperatures. A comparison of temporal dependence of the photoinduced Kerr signals with the photoinduced reflectivity indicates the change of the fractions of the phases takes place on a timescale of ten picoseconds independent of the substrate.Comment: accepted in EP

    Aggression and Motivation of Alcohol Consumption in Young People

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    The article features the theoretical and methodological approaches to aggressiveness, which can be divided into aggression, hostility, and anger. Aggression is a normal manifestation of life, coming-of-age, and social adaptation. Aggressive behavior can be constructive, instrumental, and destructive. It depends on both personality and group standards. Aggressive behavior is often legitimized as part of adaptation to the norms and rituals of a particular social group. Alcohol is responsible for many cases of aggressive behavior inside a community. Young people drink alcohol to achieve a desirable social status, improve their mood, raise confidence, and blend in. Drinking often legitimizes aggressive behavior. Particular predictors of group drinking can be used for sampling. Subjects with pronounced hostility demonstrate poor prospects for control of activity and emotions; they tend to violate social norms and are likely to develop addiction. Young people with a high level of general aggressiveness are guided by ataractic and hedonistic motivation for alcohol consumption
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