Review: The article is devoted to the development of methods for assessing the effectiveness of work collectives on the basis of social networking technologies. The main purpose of the methods being developed is to assess the effectiveness of employee interaction in the work processes. Various methods for analyzing social networks are considered, a number of key metrics have been obtained on the basis of which analytical and visual models of social networks have been built - sociograms. The paper briefly presented the main characteristics and principles of the social network, the technological process and their components. the review of the basic mechanisms of working with these concepts was conducted, and the notion of analysis of social networks and its main types was studied. Next, 4 basic types of metrics obtained in social network models of different work processes for measuring performance were formalized and described in detail. In the course of the work social networks and their graphical, numerical display on the basis of real log files of events of various organizations from different spheres were constructed. Models and calculations were carried out within the framework of ProM software. Based on the constructed social networks, the main types of metrics were obtained and analyzed, their comparison was made for different types of events, different spheres of companies. Based on the comparison of results, the main advantages and disadvantages of the effectiveness of the organization of the working process of the companies and individual participants in the process, in particular, were revealed.

Keywords: efficiency, technological process, node, networks, analysis, social network analysis, work of employees, interaction, metrics, log file

Review: The subject of the study are algorithms for the interaction of mobile stations for sharing a wireless channel with a wireless access network with token access. The object of the study is a wireless network with token access. The author considers in detail such aspects of the topic as combining the technologies of local computer networks: the IEEE 802.11 wireless technology standard (Wi-Fi technology) and Token Ring Token ring technology, describing the interaction of mobile stations for sharing a common broadcast channel. The research methodology combines methods of system analysis, informatics, reliability theory, queuing theory theory, information-logical design, mathematical modeling. The main conclusions of the study are the algorithms of wireless interaction of mobile stations for sharing a broadcast channel, providing a reliable (by the criteria of limited delay and reserved bandwidth) communication, reducing the number of retransmissions due to the fact that each station in turn uses the channel for equal periods and is forced to abandon the right to transfer after the expiration of the time allocated to it and provide resistance to node failure and automatic recovery from failures.

Keywords: communication reliability, computer network, broadcast channel, network ring technology, wireless communication, marker access, mobile station, wireless network, local area network, wireless interaction

Review: The article presents the results of analytical modeling of mobile communication systems 4G. The purpose of this study is to evaluate QoS performance in an LTE network channel. As a simulation tool, the mathematical apparatus of queuing networks (SEMO) was chosen, which proved its effectiveness for calculating the characteristics of infocommunication systems of various purposes and of any dimension. The author examined various research methods, further on the basis of the evolutionary system architecture of LTE, a conceptual, algorithmic and programming model was developed in the form of a closed homogeneous SemOI and its characteristics were calculated. The mean value analysis method was adapted to obtain network quality parameters with LTE technology. During the simulation, the probabilistic-temporal characteristics of the service process in the fourth-generation mobile communication systems were obtained: the transmission delay and the network capacity for a different number of active users, represented in the form of dependency curves from the input load. The results can be used both for designing new ones and for efficient traffic management in existing mobile networks.

Keywords: LTE, delay, mobile systems, QoS, quality of service, queuing systems, queuing networks, modeling, Mean Value Analysis, throughput

Review: The subject of the study are life cycle models and approaches to software development in the face of significant time and financial constraints. A software development workflow is considered using a flexible methodology and an iterative life-cycle model. The objects of research are modern approaches to the development of software and increasing the efficiency of labor through the proposed incentive mechanisms, based on customer requirements. The authors also pay attention to the organization of labor in software development. We used the methods of system analysis, approaches to collective decision-making under uncertainty, including survey methods and expert assessments. The authors propose an incentive mechanism for software developers working in an iterative model of an incomplete life cycle. An important result of the study is the conclusion about the effectiveness of the incentive approach, based on the implemented functionality in the current iteration of the development. The presented approach allows an objective assessment of the contribution of each developer to the solution of individual project tasks.

Keywords: unit testing, iterative model, testing, incentive mechanism, development, software, life cycle, agile development, development management, stimulating the developer

Review: The subject of this article is to increase the level of automation of engineering design in CAD systems. The object of study are gears and links in engineering products. The relevance of the work is due to the need for integrated solutions aimed at reducing the amount of work and time spent in the design and simulation of gears and links in engineering products in order to improve the efficiency of engineering design. The author focuses on the problem of increased complexity in the design of gearing profiles. The article describes the general methodology for modeling parametric libraries in the design of gears and links in engineering products. The main result of the work is the developed methodology for modeling parametric libraries of gears and links. The technique is presented in the form of a phased sequence of actions, divided into eight stages. In the development process, we used the method of parametric modeling of gears and links and the method of direct programming in CAD.

Keywords: interface, database, variable, mechanical engineering, parametric modeling, gearings, parameterization, computer aided design, profile, user dialogue

Review: The author considered in detail the main classes of modern models of information impact assessment. The subject of research is economic-mathematical methods, which include elements of approaches and results, the theory of fuzzy sets, the theory of probability, the theory of decision making and operations research and the theory of Markov chains, in the context of application to modeling the influence of information on economic processes. The purpose of the study is to analyze in detail the existing domestic and foreign models of information influence. The methodology and methodological apparatus of the research is represented by the developments and theoretical concepts presented in the works of domestic and foreign authors in the field of economic and mathematical modeling, probability theory and mathematical statistics. The novelty of the research lies in the fact that, based on the analysis of existing models of information impact, it was possible to develop approaches to the construction of mathematical models of the influence of information effects on economic processes. Also highlighted areas for further work to improve the existing models of information influence in order to further more effective assessment of information impacts on economic processes.

Keywords: targeted informational impact, Markov chains, SOCIAL NETWORK, simulation models, information management, optimization models, information impact, decision theory in economics, models of information influence, modeling

Review: The object of study of this work is a measure of semantic connectivity of texts, the subject of study is an algorithm for calculating the measure of semantic connectivity of texts. The article focuses on the method for determining the hybrid measure of the semantic connectivity of two concepts. This method underlies the algorithm for computing the similarity of two texts. Wiki projects (Wikipedia and Wiktionary) are used as sources of knowledge. Sharing them allows covering a much larger number of words as compared to using one of the wiki projects. The method uses the well-known Wikisim measure. This measure is simple, but has good performance. In the classic Wikisim method, only Wikipedia is used, so it is adapted for Wiktionary. The methodology of the work is based on modeling the process of extracting high-quality knowledge from Wiki projects - the individual work of independent volunteers. The novelty of the research lies in combining the two sources of knowledge of Wikipedia and Wiktionary and creating on their basis a new hybrid measure of semantic relatedness of concepts. The main conclusion of the work is that the combination of formal (Wiktionary) and informal (Wikipedia) sources of knowledge can lead to a better assessment of semantic connectivity between text units. The described method can be applied in economics, sociology and politics to clarify people's opinions on issues of interest.

Keywords: text, Wiktionary, Wikipedia, WikiProject, knowledge source, relatedness hybrid, semantic relatedness, word, concept, frequency response

Review: The article is devoted to the urgent problem of ensuring the security of heterogeneous information platforms using a multi-agent threat detection system. The object of the study is a multi-agent platform. The authors pay special attention to such aspects of the topic as: security of multi-agent platforms, management of threat detection agents, interconnection between different threat detection agents, vulnerability in multi-agent platforms. Trends are being considered for the development of new distributed security models. The paper presents a multi-agent architecture for security services, as well as a general scenario for deploying security in multi-agent threat detection systems. The paper presents a multi-agent architecture for security services, as well as a general scenario for deploying security in multi-agent threat detection systems. Using a multi-agent system approach to a security model that provides control from the sender using the mobility and extensibility characteristics of the agent. The multi-agent protection system model for heterogeneous information platforms provides an improved approach for online communications, providing flexible mechanisms for the comprehensive protection of heterogeneous information platforms that can satisfy various security requirements and provide better control over the data to its sender.

Keywords: threat detection agent, heterogeneous information platforms, multiagent platform, intelligent protection system, threat detection, information security, analysis systems, detection algorithms, agent platform, multi-agent system