Об интеграции формальных методов в задачах верификации операционных систем
This textbook is devoted to formal methods for program verification and is based on the lectures given by the author at CMC MSU, DCAM MIPT, and FCS HSE. It describes the basics of such approaches as deductive analysis and model checking. The list of topics includes formal semantics of programming languages (operational and axiomatic semantics), formal specification of requirements (software contracts and the linear-time temporal logic), methods for proving program correctness (the method of inductive assertions and the method of well-founded sets), and model checking methods (the automata-theoretic approach in the explicit and symbolic forms). The textbook also addresses issues of abstract interpretation, constraint solving, and model-based testing; it provides information on the Frama-C and Spin tools. Each chapter is accompanied by examples and exercises.
The article continues A.N. Sterligova’s publication “Logistical context of enterprise business model” (Logistics and Supply Chain Management. – №1 (66). – 2015. – pages 24-34). As it was described in that publication, in a challenging economic environment strategic changes for business can be implemented by changing their business models. The author provided a definition of a business model (BM) as an object connected with defining, creating, distributing, supplying value to customers, and appropriation of profits through their recognition on the market. Logistics was used to develop and use BM. The model of a logistical component was described. The author suggested a set of indexes that evaluate original supplies and results of BM in order to analyze BM effectiveness according to its results and also to decide whether developing a new enterprise BM is necessary when the quality and quantity of original resources is changing.
A further research is aimed to analyze how BM can be used in various industries and to decide if figures of initial resources and results of BM can be made universal.
The present article explains why business models are significant in modern metallurgy in the framework of customer value chain. The authors analyze BM of leading ferrous metallurgy companies bearing on the proposed logistical component of BM and determines variability of its logistical component. The researcher summarizes results of BM industry. The authors examines economic factors that make logistics help companies get required financial figures.
The article describes the main issues related to the development centers and storage, solutions, presented the domestic operating system Cloud / IX server processors architecture ARM, hello test results of http-server nginx