State — Region — Branch — Enterprise: System Sustainability Framework of the Russian Economy

This paper investigates sustainability factors of the Russian economy as a multi-level, multi-entity and multi-aspect socio-economic system from the system perspective. The economic system sustainability concept is formulated as an ability to maintain preconditions for the development by supporting and effective using of economic system structure. The leading role of the community of economic entities at different levels (including the state as the entity of international relations, regions as the entities of Federation, enterprises as the business entities) in the economic sustainability is demonstrated. The necessity of the economic entity network “extension” by strengthening the sustainability of economic sectors is emphasized. The research into the internal basic system structure of an economic entity and external structure of its immediate surroundings in socio-economic, administrative-and-managerial and market environments using the results of the new economic systems theory contributes the evidence of the similarity of these structures to the conclusion. It is shown that each of the systems includes (together with an entity itself) four systems of different types (object, environment, process and project). The entity’s system environment has the same structure in administrative-and-managerial interlevel interactions. This makes it possible to combine the problem of the entity’s sustainability and the issue of the balanced system structures forming the economic entities’ internal and external environments. The method of calculating the index of such balanced systems is given. Recommendations on the selection of economic policy measures aimed at ensuring system sustainability of the Russian economy in the period of crisis are provided. It is shown that such a policy should be carried out in accordance with the principles of economic entity protection; balanced system of the economic entities’ internal and external environment; economic entities’ corporate solidarity regardless of their level in the management hierarchy.This article is supported by the Russian Science Foundation grant, project No. 14-18-02294

Institutions: Definition, Attributes and Research Areas

The author explores the essence and content of the concept of «institute» in terms of the different approaches of contemporary institutional theory. The author shows the relationship of institutions with cultural, social, legal norms, norms of behavior, routines, and habits. The author offers his own original picture of the institutional architecture of the socio-economic system and proves subsequent research areas of institutional economics

Bunching of fluxons by the Cherenkov radiation in Josephson multilayers

A single magnetic fluxon moving at a high velocity in a Josephson multilayer (e.g., high-temperature superconductor such as BSCCO) can emit electromagnetic waves (Cherenkov radiation), which leads to formation of novel stable dynamic states consisting of several bunched fluxons. We find such bunched states in numerical simulation in the simplest cases of two and three coupled junctions. At a given driving current, several different bunched states are stable and move at velocities that are higher than corresponding single-fluxon velocity. These and some of the more complex higher-order bunched states and transitions between them are investigated in detail.Comment: 6 pages + 6 Figures, to be published in Phys. Rev. B on July 1, 200

Crossover between different regimes of inhomogeneous superconductivity in planar superconductor-ferromagnet hybrids

We studied experimentally the effect of a stripe-like domain structure in a ferromagnetic BaFe_{12}O_{19} substrate on the magnetoresistance of a superconducting Pb microbridge. The system was designed in such a way that the bridge is oriented perpendicular to the domain walls. It is demonstrated that depending on the ratio between the amplitude of the nonuniform magnetic field B_0, induced by the ferromagnet, and the upper critical field H_{c2} of the superconducting material, the regions of the reverse-domain superconductivity in the H-T plane can be isolated or can overlap (H is the external magnetic field, T is temperature). The latter case corresponds to the condition B_0/H_{c2}<1 and results in the formation of superconductivity above the magnetic domains of both polarities. We discovered the regime of edge-assisted reverse-domain superconductivity, corresponding to localized superconductivity near the edges of the bridge above the compensated magnetic domains. Direct verification of the formation of inhomogeneous superconducting states and external-field-controlled switching between normal state and inhomogeneous superconductivity were obtained by low-temperature scanning laser microscopy.Comment: 11 pages, 12 figure

Mean curvature flow in a Ricci flow background

Following work of Ecker, we consider a weighted Gibbons-Hawking-York functional on a Riemannian manifold-with-boundary. We compute its variational properties and its time derivative under Perelman's modified Ricci flow. The answer has a boundary term which involves an extension of Hamilton's Harnack expression for the mean curvature flow in Euclidean space. We also derive the evolution equations for the second fundamental form and the mean curvature, under a mean curvature flow in a Ricci flow background. In the case of a gradient Ricci soliton background, we discuss mean curvature solitons and Huisken monotonicity.Comment: final versio

Mean Curvature Flow on Ricci Solitons

We study monotonic quantities in the context of combined geometric flows. In particular, focusing on Ricci solitons as the ambient space, we consider solutions of the heat type equation integrated over embedded submanifolds evolving by mean curvature flow and we study their monotonicity properties. This is part of an ongoing project with Magni and Mantegazzawhich will treat the case of non-solitonic backgrounds \cite{a_14}.Comment: 19 page

Coherent THz emission of Bi_2Sr_2CaCu_2O_8 intrinsic Josephson junction stacks in the hot spot regime

We report on THz emission measurements and low temperature scanning laser imaging of Bi_2Sr_2CaCu_2O_8 intrinsic Josephson junction stacks. Coherent emission is observed at large dc input power, where a hot spot and a standing wave, formed in the "cold" part of the stack, coexist. By varying the hot spot size the cavity resonance frequency and the emitted radiation can be tuned. The linewidth of radiation is much smaller than expected from the quality factor of the cavity mode excited. Thus, an additional mechanism of synchronization seems to play a role, possibly arising from nonequilibrium processes at the hot spot edge.Comment: 4.1 pages, 5 figure

Interaction of hot spots and THz waves in Bi_2Sr_2CaCu_2O_8 intrinsic Josephson junction stacks of various geometry

At high enough input power in stacks of Bi_2Sr_2CaCu_2O8 intrinsic Josephson junctions a hot spot (a region heated to above the superconducting transition temperature) coexists with regions still in the superconducting state. In the ``cold'' regions cavity resonances can occur, synchronizing the ac Josephson currents and giving rise to strong coherent THz emission. We investigate the interplay of hot spots and standing electromagnetic waves by low temperature scanning laser microscopy and THz emission measurements, using stacks of various geometries. For a rectangular and a arrow-shaped structure we show that the standing wave can be turned on and off in various regions of the stack structure, depending on the hot spot position. We also report on standing wave and hot spot formation in a disk shaped mesa structure

THE MAIN TASK IS THE IMPROVEMENT OF THE ORGANIZATIONAL AND ECONOMIC MECHANISM FOR THE DEVELOPMENT OF RUSSIAN ENTERPRISES

Purpose: the purpose of this article is to justify the choice of the strategic direction of effective development of the national economy of Russia. The authors see the solution of this problem on the way of improving the organizational and economic mechanism of the functioning of Russian enterprises. This problem is considered to be one of the main authors in the consolidation of society and its mobilization for the implementation of the tasks set in the may Decree of the President of the Russian Federation (№ 204 from 2018).Methods: the study was conducted using the methods of systematic, logical, comparative analysis, involving Russian and foreign experience in solving social and economic problems. Particular attention was paid to the validity of the conclusions.Results: national economic problems are touched upon through the prism of the economy of enterprises. An attempt has been made to prove the dependence of the acceleration of the rates of economic development on the improvement of the enterprise's internal economic mechanism. In the postindustrial society, the role of enterprises as the main link in the production of material goods and the provision of services is not diminished, despite the accelerated introduction of scientific and technological progress and the increase in the value of personal property. The improvement of the internal structure of enterprises proposed in the article can significantly reduce the negative consequences of the privatization of state property. According to the authors, this will improve the efficiency of the use of human capital in terms of all its components: ordinary workers, managers, specialists, owners.Conclusions and Relevance: currently, there is a situation in which the owners of enterprises (mainly large ones) have practically unlimited rights and very limited liability for the results of the work of their enterprises. This situation hinders the development of the productive forces of society. The proposed concept of an "effective enterprise" means solidary management of enterprises (ultimately solidary management of the economy). It provides for a system of measures to remedy the situation. The first steps in this direction are the following: 1) the creation of a balanced system of enterprise management; 2) democratization of management and development of the institution of collective (people's) enterprises; 3) the movement in the direction of restraint unrestrained competition and finding ways of cooperation not only within enterprises but also in the relations between all participants of the process of production and realization of products, as well as authorities at all levels; 4) streamlining the processes for the establishment and liquidation of enterprises; 5) the active implementation of multilevel and multidimensional strategic planning. It is not possible to implement these measures in a short time. But the movement along this path creates systemic conditions for accelerating economic growth