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Blockchain as a technology is rapidly developing, finding more and more new entry points into everyday life. This is one of the elements of the technical Revolution 4.0, and it is used in the field of supply, maintenance of various types of registers, access to software products, combating DDOS attacks, distributed storage, fundraising for projects, IoT, etc. Nowadays, there are many blockchainplatforms in the world. They have one technological root but different applications. There are many prerequisites to the fact that in the future the number of new decentralized applications will increase. Therefore, it is important to develop a methodology for determining the optimal blockchainbased platform to solve a specific problem. As an example, consider the world famous platforms Ethereum, Nem, and Stellar. Each of them allows to develop decentralized applications, issue tokens, and execute transactions. At the same time, the key features of these blockchainbased platforms are not similar to one another. These very features will be considered in the article. Purpose. Identify the key parameters that characterize the blockchainbased platforms. This will provide an opportunity to present a complex blockchain technology in the form of a simple and understandable architecture. Based on these parameters and using the expertise of the article's authors, we will be able to develop a methodology to be used to solve the problems of choosing the optimal blockchainbased platform for solving the problem of developing smart contracts and issuing tokens. Methods. Analysis of the complexity of using blockchainbased platforms. Implementation of token issuance, use of test and public networks, execution of transactions, analysis of the development team and the community, analysis of the user interface and the developer interface. Discussion. By developing a platform comparison methodology to determine optimal characteristics, we can take the development process to a new level. This will allow to quickly and effectively solve the tasks. Results. Creation of a methodology for comparison blockchainbased platforms.

The modern state of criminality and its statistical analysis are an integral part of any criminological research including the field of sport. Besides the main factors forming the crime rate, the data of the judicial statistics are also influenced by the so-called minor factors that are beyond the statistics. The objective of the present research is to reveal the factors influencing the formation of indicators of statistics in the field of sport. The research uses the systematic, structural and functional, comparative and historical, and formal judicial methods that allowed determining the main directions and methods of execution of criminality recording in the field of sport that is highly latent. It was determined that there were discrepancies of the normative requirements with the qualification of wrongful acts that allowed revealing the particular correlation between the changes in the criminal law and the statistical indicators. The overrating of crime detection statistics by the particular changes in parameters of crime committed shall be called additional factors influencing the reliability and objectivity of the statistics. At the same time, the statistics of crime committed in the field of sport are required for prognostic purposes, as well as for preventive purposes, as its absence contradicts the social practice. This problem is especially acute for sportsmen who due to the reasons related, for example, to the harm injured to their health and life, do not have the ability to continue their professional career. It is a systematic approach to registering crimes committed in the field of sport that allows performing the crime prevention in full that can save also the health and life of a sportsman.

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Modern society has one of its characteristics the development of the service sector. At the same time, the level of development of the sphere of performance of works and rendering of services is defined rather with prevalence, but at all with observance of necessary rules and requirements of safety. Due to the priority of the intensity of production by the performers of works and services, certain rules and safety requirements are often ignored, which in any case creates the risk of occurrence of certain negative consequences. The legal structure of the corpus delicti provided for in article 216 of the criminal code obliges the law enforcer to establish not only the fact of violation of safety rules during construction works and the fact of occurrence of socially dangerous consequences in the form of causing serious harm to human health or major damage, but also the presence of a causal relationship between these phenomena to bring the guilty person to criminal responsibility. The work is devoted to the development of evidence-based recommendations for resolving law enforcement issues related to the assessment of the causal complex in the unsafe conduct of construction works. To achieve this goal, the current criminal legislation, explanations of the Plenum of the Supreme Court of the Russian Federation, materials of judicial and investigative practice, as well as scientific works affecting the theme of the work are analyzed. The methodological basis consists of General scientific provisions of philosophy, logic and other Sciences, dialectical, formal-logical, hypothetical, linguistic methods, a special place in the study took methods such as analysis and synthesis, induction and deduction. Proposals to improve law enforcement in terms of assessing the role of causes and conditions in the legal assessment of socially dangerous acts under article 216 of the criminal code are formulated.