INTERVALS OPTIMIZATION OF SYSTEMS INFORMATION SECURITY INSPECTION

A Markov model is suggested for secure information systems, functioning under conditions of destructive impacts, which aftereffects are found by on-line and test control. It is assumed that on-line control, in contrast to the test one, is char- acterized by the limited control completeness, but does not require the stopping of computational process. The aim of re- search is to create models that optimize intervals of test control initialization by the criterion of probability maximization for system stay in the ready state to secure fulfillment of the functional requests and minimization of the dangerous system states in view of the uncertainty and intensity variance of the destructive impacts. Variants of testing intervals optimization are con- sidered depending on the intensity of destructive impacts by the criterion of the maximum system availability for the safe execution of queries. Optimization is carried out with and without adaptation to the actual intensity change of destructive impacts. The efficiency of adaptive change for testing periods is shown depending on the observed activity of destructive impacts. The solution of optimization problem is obtained by built-in tools of computer mathematics Mathcad 15, including symbolic mathematics for solution of systems of algebraic equations. The proposed models and methods of determining the optimal testing intervals can find their application in the system design of computer systems and networks of critical applications, working under conditions of destabilizing actions with the increased requirements for their safety

ИСТОРИЯ ЗАКОНОДАТЕЛЬНЫХ ИЗМЕНЕНИЙ В СФЕРЕ СОХРАНЕНИЯ ИСТОРИКО-КУЛЬТУРНОГО НАСЛЕДИЯ РСФСР В 1980-е гг

The preservation of cultural heritage for many years was one of the main directions of the state cultural policy of the RSFSR. The relevance of the study is associated with the need for a comprehensive analysis of the impact of changes in state law on the protection of cultural heritage sites. This article is the first to examine the impact of the Law on the Protection and Use of Monuments of History and Culture, adopted in 1976 on the management and protection of cultural heritage sites, with the aim of determining the development of state policy in the protection of historical and cultural monuments. The methodological base is primarily associated with historical-systemic and historical-comparative methods. The main source of research was documents and legislative acts related to structural changes in the rules for the protection of cultural heritage in the RSFSR. The legislative framework of the system for the protection of monuments of the RSFSR has a rich past and the Law adopted in 1977 became a peculiar embodiment of all previous legislative acts adopted by the state in this area. Since there were several tens of thousands of monuments of various levels on the territory of the RSFSR, changes in the legislation were, to a greater extent, related to the clarification of the rules for use and improvement. In addition, changes in legislation punished inappropriate care of historical and cultural monuments. In the course of the study, the authors come to the conclusion that changes in the legislation assigned the rights and obligations of Soviet citizens within the scope of protection of monuments. An important place in the text of the new Law is occupied by a certain format for the grouping of monuments, which distributed objects of cultural heritage according to new lists

О направлениях развития системы перевозок на воздушном транспорте

In transport system of Russia air transport is one of main types of passenger and cargo transport. Demand for air transportation constantly increases that allows to consider reasonably improvement of transportations on air transport as the priority direction of development in civil aviation.В транспортной системе России воздушный транспорт является одним из основных видов пассажирского и грузового транспорта. Спрос на авиаперевозки постоянно увеличивается, что позволяет обоснованно считать совершенствование перевозок на воздушном транспорте приоритетным направлением развития в гражданской авиации

Ergodic Jacobi matrices and conformal maps

We study structural properties of the Lyapunov exponent $\gamma$ and the density of states $k$ for ergodic (or just invariant) Jacobi matrices in a general framework. In this analysis, a central role is played by the function $w=-\gamma+i\pi k$ as a conformal map between certain domains. This idea goes back to Marchenko and Ostrovskii, who used this device in their analysis of the periodic problem

On the origin of petroleum n-alkylbenzenes

© 2015 Pleiades Publishing, Ltd. The homologous series of C9-C23 n-alkylbenzenes has been first identified in the products of thermal and thermocatalytic transformations of the insoluble part of the Arthrobacter sp. RV and Pseudomonas aeruginosa RM bacterial biomass, and their distribution has been revealed; a homologous series of n-alkyltoluenes has been discovered as well. It has been suggested that the n-alkylbenzenes are biomarkers