52 research outputs found

    Foreign experience of public administration in the context of the economic equilibrium of synthetic economic crisis

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    This article identify catalysts of synthetic economic crisis. These catalysts are the subject of transnational corporations, international financial, trade organizations, regional integration groupings. Generalized mechanism for the flow of synthetic economic crisis and their types. This article also proves that the response of governments to the process flow of synthetic economic crisis with the help of the classical fiscal, monetary and administrative-legislative instruments are not effective

    Creativity of High School Teachers Over Time

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    This article deals with the creativity of teachers of higher education in the process of their professional activity. The teacher's creativity is substantiated as an important factor that determines the success of the teacher's professional activity and, as a consequence, a better educational process. An active professional thesaurus of a teacher is considered as a means of supporting indicators of changes in biological creativity. The data were obtained from direct surveys of teachers, administrators and managers of universities, using D. Johnson's creativity questionnaire, adapted by E.V. Tunik, as well as from the review of the results of scientific and pedagogical activities of university teachers: original articles, creative classes, and translation of creative behavior. Based on the data of the study, the dependence of the level of creativity of a higher education teacher on the level of a professional thesaurus is revealed. In particular, the article presents the level of creativity of teachers who combine educational work with research, teachers who are mainly engaged in educational activities and representatives of the administrative and managerial personnel of universities, combining managerial functions with teaching

    Monopolar and dipolar relaxation in spin ice Ho2_2Ti2_2O7_7

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    When degenerate states are separated by large energy barriers, the approach to thermal equilibrium can be slow enough that physical properties are defined by the thermalization process rather than the equilibrium. The exploration of thermalization pushes experimental boundaries and provides refreshing insights into atomic scale correlations and processes that impact steady state dynamics and prospects for realizing solid state quantum entanglement. We present a comprehensive study of magnetic relaxation in Ho2_2Ti2_2O7_7 based on frequency-dependent susceptibility measurements and neutron diffraction studies of the real-time atomic-scale response to field quenches. Covering nearly ten decades in time scales, these experiments uncover two distinct relaxation processes that dominate in different temperature regimes. At low temperatures (0.6K<T<1K) magnetic relaxation is associated with monopole motion along the applied field direction through the spin-ice vacuum. The increase of the relaxation time upon cooling indicates reduced monopole conductivity driven by decreasing monopole concentration and mobility as in a semiconductor. At higher temperatures (1K<T<2K) magnetic relaxation is associated with the reorientation of monopolar bound states as the system approaches the single-spin tunneling regime. Spin fractionalization is thus directly exposed in the relaxation dynamics

    Cardiotoxic Effects of Yew Tree and Pink Periwinkle Alkaloids

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    Antitumour herbal medicines based on pink periwinkle and yew tree alkaloids are included in combination therapies for many types of cancer. The use of these classes of products may entail cardiotoxic effects leading to life-threatening conditions. The aim of the study was to analyse scientific literature on cardiotoxic effects of anticancer drugs based on yew tree alkaloids (taxanes) and pink periwinkle alkaloids (vinca alkaloids). The results of the analysis demonstrated that the main manifestations of taxane-induced cardiotoxicity were bradycardia, atrioventricular block, atrial and ventricular arrhythmias. Concomitant use of taxanes and anthracycline antibiotics exacerbated cardiotoxic effects of both drug classes. The use of vinca alkaloids was associated with haematological toxicity in the form of neutropenia, while cardiotoxic effect was rarely observed during monotherapy. Raising awareness among oncologists, cardiologists, and other specialists involved in the management of cancer patients about potential cardiac complications of antitumour therapy contributes to early detection of adverse reactions and allows for individual correction of treatment regimens, especially in patients with predisposition to cardiovascular disease

    Electron transport in a quasi-one dimensional channel on suspended helium films

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    Quasi-one dimensional electron systems have been created using a suspended helium film on a structured substrate. The electron mobility along the channel is calculated by taking into account the essential scattering processes of electrons by helium atoms in the vapor phase, ripplons, and surface defects of the film substrate. It is shown that the last scattering mechanism may dominate the electron mobility in the low temperature limit changing drastically the temperature dependence of the mobility in comparison with that controlled by the electron-ripplon scattering.Comment: 4 pages, 1 figur

    Can Galactic Observations Be Explained by a Relativistic Gravity Theory?

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    We consider the possibility of an alternative gravity theory explaining the dynamics of galactic systems without dark matter. From very general assumptions about the structure of a relativistic gravity theory we derive a general expression for the metric to order (v/c)2(v/c)^2. This allows us to compare the predictions of the theory with various experimental data: the Newtonian limit, light deflection and retardation, rotation of galaxies and gravitational lensing. Our general conclusion is that the possibility for any gravity theory to explain the behaviour of galaxies without dark matter is rather improbable.Comment: 12p, REVTeX 3.

    A Low Complexity Scheme for Entanglement Distributor Buses

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    For technological purposes and theoretical curiosity, it is very interesting to have a building block that produces a considerable amount of entanglement between on-demand sites through a simple control of a few sites. Here, we consider permanently-coupled spin networks and study entanglement generation between qubit pairs to find low-complexity structures capable of generating considerable entanglement between various qubit pairs. We find that in axially symmetric networks the generated entanglement between some qubit pairs is rather larger than generic networks. We show that in uniformly-coupled spin rings each pair can be considerably entangled through controlling suitable vertices. To set the location of controlling-vertices, we observe that the symmetry has to be broken for a definite time. To achieve this, a magnetic flux can be applied to break symmetry via Aharonov-Bohm effect. Such a set up can serve as an efficient entanglement distributor bus in which each vertex-pair can be efficiently entangled through exciting only one fixed vertex and controlling the evolution time. The low-complexity of this scheme makes it attractive for use in nanoscale quantum information processors.Comment: 23 pages, 4 figures, Major revision, title changed, published versio

    Superconducting Nanocircuits for Topologically Protected Qubits

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    For successful realization of a quantum computer, its building blocks (qubits) should be simultaneously scalable and sufficiently protected from environmental noise. Recently, a novel approach to the protection of superconducting qubits has been proposed. The idea is to prevent errors at the "hardware" level, by building a fault-free (topologically protected) logical qubit from "faulty" physical qubits with properly engineered interactions between them. It has been predicted that the decoupling of a protected logical qubit from local noises would grow exponentially with the number of physical qubits. Here we report on the proof-of-concept experiments with a prototype device which consists of twelve physical qubits made of nanoscale Josephson junctions. We observed that due to properly tuned quantum fluctuations, this qubit is protected against magnetic flux variations well beyond linear order, in agreement with theoretical predictions. These results demonstrate the feasibility of topologically protected superconducting qubits.Comment: 25 pages, 5 figure
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