Questions of authentication and standardization of white varieties of Ceylon tea imported to Russia

The article raises questions concerning the reasons for the falsification of white tea varieties in Russia, the possibility of determining its authenticity by instrumental and sensory methods. The technological process and parameters of brewing leaves of white tea varieties, for example, silver tea, are considered. The criteria for the organoleptic evaluation of the silver tea infusion are developed with repeated brewing by "spillage" metho

On the Structure of Advective Accretion Disks At High Luminosity

Global solutions of optically thick advective accretion disks around black holes are constructed. The solutions are obtained by solving numerically a set of ordinary differential equations corresponding to a steady axisymmetric geometrically thin disk. We pay special attention to consistently satisfy the regularity conditions at singular points of the equations. For this reason we analytically expand a solution at the singular point, and use coefficients of the expansion in our iterative numerical procedure. We obtain consistent transonic solutions in a wide range of values of the viscosity parameter alpha and mass acretion rate. We compare two different form of viscosity: one takes the shear stress to be proportional to the pressure, while the other uses the angular velocity gradient-dependent stress. We find that there are two singular points in solutions corresponding to the pressure-proportional shear stress. The inner singular point locates close to the last stable orbit around black hole. This point changes its type from a saddle to node depending on values of alpha and accretion rate. The outer singular point locates at larger radius and is always of a saddle-type. We argue that, contrary to the previous investigations, a nodal-type inner singular point does not introduce multiple solutions. Only one integral curve, which corresponds to the unique global solution, passes simultaneously the inner and outer singular points independently of the type of inner singular point. Solutions with the angular velocity gradient-dependent shear stress have one singular point which is always of a saddle-type and corresponds to the unique global solution. The structure of accretion disks corresponding to both viscosities are similar.Comment: 20 pages, 6 figures, submitted to Ap

SIMULATION OF INFORMATION INFRASTRUCTURE FOR SMALL PEDAGOGICAL SYSTEM

The model of information infrastructure control for small pedagogical system including virtual machines is presented. Particular models of pedagogical system parameters are defined within the control model; the usage of risk model and application possibility of software technical quality model are justified. The key events (decision points) are highlighted in describing the life cycle of infrastructure control. The set of methods and algorithms supporting decision-making in the framework of a small pedagogical system is proposed. In order to illustrate the applicability of the generated solutions the main results of the experiments are presented

Management of investment attractiveness of enterprises: Principles, methods, organization

In modern conditions for effective activity of the enterprise is particularly relevant is the problem of the mobilization and effective use of investments. Investment attractiveness is an integral part of business activity of business entities, including production, innovation, market, marketing and other activity. Formation of investment attractiveness, the development of a clear investment strategy, determining its priorities, to mobilize all sources of investment is critical to sustainable and qualitative development of enterprises in today's challenging environment. It is the process of investing; the firm sets the rhythm of existence in the period before the implementation of the new investment project. The logic of the functioning of the company is presented as follows: Investments - the period of growth of fixed costs - the company achieve non-profit development (the threshold of profitability) - capacity-financial stability - new investments, etc. the Existence and efficient operation of the enterprise in market conditions of managing unrealistic without well-established management of its capital, that is, the main types of funding (investment of resources) in the form of material and money, various types of financial instruments. Capital of the company is, on the one hand, the source and the result of activity of the enterprise

Accretion disks around Black Holes with Advection and Optical Depth Transition

We consider the effects of advection and radial gradients of pressure and radial drift velocity on the structure of accretion disks around black holes with proper description of optically thick/thin transitions. We concentrated our efforts on the models with large accretion rate. Contrary to disk models neglecting advection, we find that continuous solutions extending from the outer disk regions to the inner edge exist for all accretion rates we have considered. We show that the sonic point moves outward with increasing accretion rate, and that in the innermost disk region advection acts as a heating process that may even dominate over dissipative heating. Despite the importance of advection on it's structure, the disk remains geometrically thin. Global solutions of advective accretion disks, which describe continuously the transition between optically thick outer region and optically thin inner region are constructed and analyzed.Comment: 13 pages, 8 figures, to be published in Proceedings of the Gamov Memorial International Conference, Odessa, Ukraine, August 8-14, 2004, Cambridge Scientific Publication

Pseudo-Schwarzschild Spherical Accretion as a Classical Black Hole Analogue

We demonstrate that a spherical accretion onto astrophysical black holes, under the influence of Newtonian or various post-Newtonian pseudo-Schwarzschild gravitational potentials, may constitute a concrete example of classical analogue gravity naturally found in the Universe. We analytically calculate the corresponding analogue Hawking temperature as a function of the minimum number of physical parameters governing the accretion flow. We study both the polytropic and the isothermal accretion. We show that unlike in a general relativistic spherical accretion, analogue white hole solutions can never be obtained in such post-Newtonian systems. We also show that an isothermal spherical accretion is a remarkably simple example in which the only one information--the temperature of the fluid, is sufficient to completely describe an analogue gravity system. For both types of accretion, the analogue Hawking temperature may become higher than the usual Hawking temperature. However, the analogue Hawking temperature for accreting astrophysical black holes is considerably lower compared with the temperature of the accreting fluid.Comment: Final Version to appear in the journal General Relativity & Gravitation, Volume 27, Issue 11, 2005. 17 pages, Two colour and one black and white figures. Typos corrected. Recent reference on analogue effect in relativistic accretion disc adde

Influence of Demographic Factors on the Quality of Life of the Population in the Context of Global Challenges

Concentration and intensification of risks in demographic, economic, environmental spheres, depletion of natural resources, climate change and escalation of geo-political (global and regional) tensions changed living conditions of people in the world, country, regions. On the one hand, reaction of Russian regions to global changes has an all-Russian context; on the other hand, regions differ in terms of demographic processes and changes in the quality of life of the population. The article substantiates intensification of threats to reduce the quality of life of the population in regions under the influence of unfavourable factors in demographic sphere. Regions of the Ural Federal District were chosen as the research site. A statistical analysis of demographic indicators was conducted to examine their impact on the quality of life of the population in the Ural Federal District’s regions.Концентрация и усиление рисков в демографической, экономической, экологической сферах, истощение природных ресурсов, изменение климата, усиление геополитических конфликтов (мирового и регионального масштабов) ведут к изменениям условий жизни людей в мире, стране, регионах. Реакция российских регионов на глобальные изменения, с одной стороны, имеет общероссийский контекст, с другой — территориальную специфику относительно демографических процессов и изменений качества жизни населения. В статье обосновано усиление угроз снижения качества жизни населения в регионах под влиянием неблагоприятных факторов в демографической сфере. В качестве полигона исследования были выбраны регионы Уральского федерального округа. В рамках предложенной логики исследования был проведен статистический анализ демографических индикаторов с позиций их влияния на качество жизни населения регионов УрФО

Synthesis and antifungal activity of monoterpenoids of the carane series

The antifUngal activity of terpenoids of the carane series was studied; an interaction was found between the structures of these compounds and their antifungal properties. The actions of several terpenoids on the adhesive activity and enzyme systems of the fungus Candida albicans were studied. © 2012 Springer Science+Business Media, Inc

UNIVERSITY INTELLECTUAL CAPITAL FORMATION AND DEVELOPMENT

Purpose of the study: One of the most important terms to solve the problems of the education system is the educational institution’s intellectual capital, which significantly transforms the role and functions of the modern educator. The purpose of the article is to identify the essence of the University's intellectual capital and to justify the trajectory of its development, due to the needs and capabilities of education stakeholders. Methodology: Based on the methodology of education quality management the article justifies the leading role of quality education as an imperative of the University development. Intellectual capital is considered from the standpoint of organizational resources that determine the cost of the final product – the quality of education and the competitive position of the University; its development is carried out based on the project-target approach. Results: Modern requirements for the intellectual capital of the educational organization are revealed, the role and essence of pedagogical activity of teachers of higher education institutions in its formation are shown. The importance of continuous improvement of hard and soft competencies of University teachers as a way of incrementing intellectual capital is shown. The adaptive model’s design of University teachers’ career strategies based on design-target mechanisms is presented that determines the organizational development of the University. Applications of this study: The results determined the possibility to consider organizational and human knowledge and competence as a special type of investment to improve the functioning of the University. The recommendations for the construction of models of the University intellectual capital management are presented. The article is intended for employees of the education system, educators, researchers, and heads of the University departments. Novelty/Originality of this study: The contribution is made to the theory of the University’s social and cognitive management based on expanding the powers of quality management in the field of intellectual capital management

Extraordinary behavior of β-hydroxy sulfoxides and sulfone of pinane series

© 2017 Taylor & Francis Group, LLC.The “racemic compound-like” behavior, low-temperature conformational rearrangement and “crystallization-induced diastereomerization” of β-hydroxysulfoxides and sulfone of pinane series have been studied. It was established, that the sample of sulfoxide crystallizes as an asymmetric dimer containing a supramolecularcentro-symmetric moiety formed through S=O···H‒O interactions between two independent molecules. Moreover, it was found that this dimer can crystallize in two so-called “packing polymorphs”—monoclinic and triclinic ones. By transition from the room temperature to 150 К for both polymorphic forms conformational restructuring of a stable hydrogen-bonded synthon from “unfolded” form to “folded” one has been observed. The sample of sulfoxide is interesting as the first example of the co-crystallization of chiral sulfur compounds. Surprisingly we have found a similar H-bonded dimer, formed by independent molecules, where all sulfone molecules are identical in stereochemical aspect. We suggested to use the new term “crystallization-induced diastereomerization” for the description of the stereochemical process leading to the formation of sulfone dimer. From a supramolecular chemistry point of view, we can speak of the finding of a new robust and reproducible synthon. From a stereochemical point of view, an “enantiophilic” fragment was discovered—a β-hydroxysulfoxide or sulfone group, capable of recognizing its mirror image