Spin-transfer mechanism of ferromagnetism in polymerized fullerenes: AbinitioAb initio calculations

A mechanism of the high temperature ferromagnetism in polymerized fullerenes is suggested. It is assumed that some of the C$_{60}$ molecules in the crystal become magnetically active due to spin and charge transfer from the paramagnetic impurities (atoms or groups), such as hydrogen, fluorine, hydroxyl group OH, amino group NH$_2$, or methyl group CH$_3$, dispersed in the fullerene matrix. The exchange interaction between the spins localized on the magnetically active fullerenes is evaluated using \textit{ab initio} calculations. The nearest neighbour and next nearest neighbour exchange interaction is found to be in the range $0.1\div 0.3$ eV, that is, high enough to account for the room temperature ferromagnetism.Comment: typos corrected, 8 pages, 3 figures, LaTe

Дексмедетомидин как кардиопротектор в кардиохирургии (обзор)

The literature review presents an analysis of publications on the use of a selective α2-adrenergic receptor agonist (α2-AR) dexmedetomidine as a cardioprotector in cardiosurgical interventions. It summarizes historical aspects of the introduction of α2-AR agonists in the intensive care practice. It analyzes possible mechanisms of the cardioprotective effect of dexmedetomidine (central sympatholysis, favorable effects on the coronary circulation and relief of the coronary steal syndrome in originally ischemized areas of the myocardium, antiinflammatory and antioxidant effects, and prevention of apoptosis activation). Data from experimental studies of dexmedetomidine cardioprotection were analyzed. Results of clinical studies, including data of metanalyses, were discussed. It dwells on data on the favorable effect of dexmedetomidine on various parameters of the postoperative period, including a decreased risk of delirium, general complications of cardiosurgical interventions, and the mortality rate in patients. It presents data on cardioprotective properties of dexmedetomidine in surgical patients who undergo noncardiac interventions, particularly vascular ones, including high risk surgeries in the aorta. A comparative analysis of results of clinical trials studying the dexmedetomidine cardioprotection during surgeries with extracorporeal circulation was performed. A range of pharmacological effects of dexmedetomidine during anesthesiological support of cardiac surgeries, including those in elderly and senile patients, was described. It has been concluded that the dexmedetomidine cardioprotection in the various fields of surgery is obviously very promising.В данном обзоре литературы представили анализ публикаций, посвященных использованию селективного агониста α2-адренергических рецепторов (α2-АР) дексмедетомидина в качестве кардиопротектора при кардиохирургических операциях. Кратко изложили исторические аспекты внедрения агонистов α2-АР в практику анестезиологии-реаниматологии. Проанализировали возможные механизмы кардиопротекторного действия дексмедетомидина (центральный симпатолизиз, благоприятное влияние на для коронарного кровотока и уменьшение эффекта коронарного «обкрадывания» исходно ишемизированных зон миокарда, противовоспалительный и антиоксидантный эффект, предупреждение активации апоптоза). Проанализировали данные экспериментальных исследований, посвященных дексмедетомидиновой кардиопротекции. Рассмотрели результаты клинических исследований, включая данные мета-анализов. Изложили данные о благоприятном влиянии дексмедетомидина на различные показатели послеоперационного периода, включая снижение риска развития делирия, общие осложнения кардиохирургических вмешательств и летальность больных. Представили данные о кардиопротекторных свойствах дексмедетомидина у хирургических больных, которым выполняют некардиальные вмешательства, особенно сосудистые, включая операции высокого риска на аорте. Выполнили сравнительный анализ результатов клинических исследований, изучавших дексмедетомидиновую кардиопротекцию при операциях с искусственным кровообращением. Описали комплекс полезных фармакологических эффектов дексмедетомидина при анестезиолого-реаниматологическом обеспечении кардиохирургических операций, в том числе у больных пожилого и старческого возраста. Сделали вывод, что дексмедетомидиновая кардиопротекция в различных областях хирургии, несомненно, имеет хорошие перспективы

Interplay between magnetic properties and Fermi surface nesting in iron pnictides

The wave-vector q and doping (x,y) dependences of the magnetic energy, iron moment, and effective exchange interactions in LaFeAsO{1-x}F{x} and Ba{1-2y}K{2y}Fe2As2 are studied by self-consistent LSDA calculations for co-planar spin spirals. For the undoped compounds (x=0, y=0), the minimum of the calculated total energy, E(q), is for q corresponding to stripe antiferromagnetic order. Already at low levels of electron doping (x), this minimum becomes flat in LaFeAsO{1-x}F{x} and for x>=5, it shifts to an incommensurate q. In Ba{1-2y}K{2y}Fe2As2, stripe order remains stable for hole doping up to y=0.3. These results are explained in terms of the band structure. The magnetic interactions cannot be accurately described by a simple classical Heisenberg model and the effective exchange interactions fitted to E(q) depend strongly on doping. The doping dependence of the E(q) curves is compared with that of the noninteracting magnetic susceptibility for which similar trends are found.Comment: 17 pages, 5 figure

Protection by the government and security support for the parties of modern criminal process in Russia: Problems and perspectives

The article presents an analysis of the government protection and security support for the parties of modern criminal process in the Russian Federation. The party of criminal process should feel safe from possible criminal encroachments caused by the execution of civic duty at any stage of the proceedings. The state, in turn, shall ensure the protection of life, health, property, honor and dignity of people regarding their involvement in the criminal proceedings. Evaluation of the implementation status of measures of government protection of the parties of the Russian criminal proceedings, promoting justice, proves the measures to be sufficient and relevant to current conditions. Nevertheless, there are some gaps in legislation regulation and some complexity of law enforcement in this area. In this regard, the authors identified the main directions to solve actual problems in government protection and security support for the parties of modern criminal process in the Russian Federation on the theoretical, legislative and law enforcement levels. The authors of this article have investigated the positive developments and existing problems in this sphere, using the comparative-legal and statistical methods

Conductive Atomic Force Microscopy study of local resistive switching by a complex signal in the yttria stabilized zirconia films

This work was supported by RFBR (18-42-520059р_а)

Mixing of coherent waves in a single three-level artificial atom

We report coherent frequency conversion in the gigahertz range via three-wave mixing on a single artificial atom in open space. All frequencies involved are in vicinity of transition frequencies of the three-level atom. A cyclic configuration of levels is therefore essential, which we have realised with an artificial atom based on the flux qubit geometry. The atom is continuously driven at two transition frequencies and we directly measure the coherent emission at the sum or difference frequency. Our approach enables coherent conversion of the incoming fields into the coherent emission at a designed frequency in prospective devices of quantum electronics.Comment: 5 pages, 4 figure

Worldline Casting of the Stochastic Vacuum Model and Non-Perturbative Properties of QCD: General Formalism and Applications

The Stochastic Vacuum Model for QCD, proposed by Dosch and Simonov, is fused with a Worldline casting of the underlying theory, i.e. QCD. Important, non-perturbative features of the model are studied. In particular, contributions associated with the spin-field interaction are calculated and both the validity of the loop equations and of the Bianchi identity are explicitly demonstrated. As an application, a simulated meson-meson scattering problem is studied in the Regge kinematical regime. The process is modeled in terms of the "helicoidal" Wilson contour along the lines introduced by Janik and Peschanski in a related study based on a AdS/CFT-type approach. Working strictly in the framework of the Stochastic Vacuum Model and in a semiclassical approximation scheme the Regge behavior for the Scattering amplitude is demonstrated. Going beyond this approximation, the contribution resulting from boundary fluctuation of the Wilson loop contour is also estimated.Comment: 37 pages, 1 figure. Final version to appear in Phys.Rev.

Restoration of Overlap Functions and Spectroscopic Factors in Nuclei

An asymptotic restoration procedure is applied for analyzing bound--state overlap functions, separation energies and single--nucleon spectroscopic factors by means of a model one--body density matrix emerging from the Jastrow correlation method in its lowest order approximation for $^{16}O$ and $^{40}Ca$ nuclei . Comparison is made with available experimental data and mean--field and natural orbital representation results.Comment: 5 pages, RevTeX style, to be published in Physical Review

METHODICAL APPROACHES TO THE FORMATION OF ADAPTIVE MANAGEMENT STRUCTURES

The article has been devoted to the formation of adaptive organizational management structures. The essence of structures and their relationship with other elements of the control system have been analyzed. Adaptability and flexibility are considered as the most important indicators of the efficiency of structures, their ability to ensure sustainable functioning and innovative development of enterprises. The mechanism of formation of adaptive structures has been presented. The issues about the quality of adaptation, the adaptive characteristics of the structure and their consistency with the level and quality of adaptation of other elements of the enterprise, the interface of adaptability and flexibility, the pace of change have been raised. It has been concluded, that the structure is not effective, if it does not seek adaptability. Meanwhile, the process of adaptation should be innovative and ensure effective innovation and technological development of the enterprise