It is known that diseases of the oral cavity and anomalies of the dentition are polyetiological. Prevention of these diseases is extremely important for the health of the population of Russia, and in order to ensure maximum effectiveness of preventive programs, it is necessary to develop them taking into account all factors and taking into account the characteristics of various regions of the vast extent of the country. At the same time, the level of development of information technologies and, in particular, geographic information systems makes it relatively easy to solve such problems, which until recently required huge labor costs.

Keywords: prophylaxy, epidemiology, statistical analysis, information technology, geoinformatics

The results of verification of turbine and rotary gas meters used as measuring instruments in gas supply systems of industrial enterprises are presented. It was found that about 50% of calibrated meters exceed the requirements for the permissible values of the main relative error, as a rule, in the range of minimum gas flow rates. Ways to increase the service life of gas meters are proposed.

Keywords: gas flow metering, gas meter, verification, basic relative error, gas flow

This article highlights conceptual models that contribute to assessing the effectiveness of language policy from historical perspective. The use of the comparative historical approach has allowed us to identify the most effective forms of language policy in the modern national situational context. The authors place a special emphasis in the article on the critical analysis of a number of historical models that have long acted as the main tool for assessing the effectiveness of language policy in the West. The novelty of the article lies in the discovery of new modes of measuring the effectiveness of the principles of language policy and planning applied in practice. The article also make sa strong case for understanding language as an active means of social reality in all the diversity of its forms and relationships.

Keywords: language policy, language planning, comparative historical approach, historical narrative, historical consciousness, eurocentric model, cultural center, peripheral regions, deductive methods, inductive methods, modernism, postmodernism