Methods and instruments the characteristics of porosity and permeability of solids and materials are described, which are part of the improved GET 210-2014. The metrological characteristics of the GET 210-2014 are compared and after its improvement the GET 210-2019. Certified reference materials of approved types based on micro-, meso- and macroporous solids are considered. The results of international comparisons, confirmed measuring and calibration capabilities, as well as a comparison of the metrological characteristics of the GET 210-2019 with the standards of foreign countries are presented.

The measurement problem of calibration of the cosmological distance scale is considered from the point of view of the conditions of applicability of the regression analysis. It is shown that the rank inversion and statistical heterogeneity of data on supernovae SN ia, which were used in 1998–1999 to detect the “acceleration of the expansion of the Universe”, and in 2004–2007 – as “extraordinary evidence” of its existence, is the reason for the discrepancy and inconsistency of the obtained estimates of the parameters of the Friedman-Robertson-Walker model. Although the use of tests for inadequacy for models of the cosmological distance scale reduces these negative effects, the fact remains that the cosmological distance scale based on redshift has neither the status of metric nor ordinal.

The results obtained during the development of an optical frequency standard, based on cold ⁸⁷Sr atoms are presented. The parameters of experimental optical schemes developed for the realization of all stages of sequential laser cooling and trapping of ⁸⁷Sr atoms into an optical lattice are described. Clock transition spectroscopy was successfully performed with a spectral transition linewidth of 12 Hz. A measuring scheme based on a femtosecond optical frequency synthesizer has been developed, which makes it possible to compare the optical standard with a hydrogen maser. The created optical frequency standard was included in the primary standard GET 1-2018.

A system of metrological support is proposed that allows testing for type approval, verification and calibration of stands for measuring mass, coordinates of mass center and moments of inertia. The mathematical model of a special standard has been developed. It is based on the analytical principles for the determination of the mass center coordinates and inertia moments of homogeneous bodies with a regular geometric shape. The standard consists of a set of modules and fasteners of a special shape. Each module is a reference measure of both mass, center of mass coordinates, and moments of inertia, and can be used either separately or in a set with other modules. A scheme for transferring units of values from state primary standards of mass and length to stands using special standards has been developed. A method for calibration of special standards has been developed. It includes indirect measurements of the coordinates of the center of mass and moments of inertia based on the results of direct measurements of the mass and geometric dimensions of the standard modules’ elements, as well as measurements of the form deviations and deviations of position of the standard modules’ surfaces and static balancing of the standard. Technical requirements for special standards have been developed to minimize methodological measurement uncertainties when reproducing units of values by the standard. A line of special standards was created, their certification and approval in Rosstandart was carried out. Stand verification methods using special standards have been developed and approved. The type approval of two stands was carried out using special standards. The decision to grant a patent for the invention “Method for determining the error of the stand for measuring the characteristics of the mass geometry of products and a device for its implementation” was received.

In this work, we studied the strength parameters, fractographic patterns, and the microstructure of epoxy polymer samples cured both by thermal and microwave methods at various temperature, power, and time conditions. The dependence of strength on curing conditions is determined using the tensile test method. To achieve maximum strength for both curing methods optimum conditions were found. A comparative fractographic analysis of microwave and thermal cured samples fractures having similar strength characteristics was carried out by electron microscopy. It was found that microwave field curing leads to the globules size increase in the cured epoxy polymer and an increase in the number of nanopores in the material. Plastic samples local deformation is also more pronounced during fracture, which leads to a greater difference of the main and secondary cracks propagation velocities ratio. The relationship between the studied samples optical density in the wavelength range from 360 to 2500 nm and the parameters of both curing methods (microwave and thermal) was established.

The influence of the provisions of legal metrology on the formation and functioning of the monetary environment in market conditions is studied. It is shown that the use of material (reference) measures for determining the value of goods in monetary units makes it possible to form a stable monetary system, equal for all market participants. This system can reasonably be attributed to information measuring systems. Systems based on the use of constant material measures that determine the value of goods and money in international trade have been formed and functioned for a long time. In the XIX-XX centuries, the monetary system, in which a fixed weight of gold served as the material measure of money, was called the “gold standard”. In the 1970s, this system was abandoned without objective reasons. Nowadays, many people believe that the main reason is the uncontrolled issuance of paper money (US dollars). As a result, the material measure of money was replaced by a monetary measure. The money of a number of selected countries turned out to be a measure of the national currencies of other countries. Then money was made a commodity – an object of market trading, the price of which is determined by supply and demand. Thus, the most important principle of metrology was violated – the invariability (constancy) of the measure of system objects. The resulting monetary system became unstable. This situation has led to an increase in the number of proposals for a return to the gold standard. The analysis carried out in the paper confirmed the relevance of these proposals. At the present stage of development of metrology, it is advisable to explore the possibility of a broader (not only at the expense of precious metals) resource provision of material monetary measures, in particular, to consider the possibility of using materials and (or) goods that are in high demand in the international market as monetary measures.

The paper presents the assessment of equivalence of the spectral radiance scales in the wavelength range from 250 nm to 2500 nm, reproduced at the national metrology institutes of Korea (KRISS), China (NIM) and Russia (VNIIOFI), carried out in the framework of international comparison. The common set of three tungsten strip lamps was used as an artefact. Based on a series of blind measurements of the lamps spectral radiance performed at each laboratory, the reference value of the comparison was determined at each wavelength as a weighted mean of the measured data of three laboratories. The degree of equivalence of each laboratory was then calculated as the deviation of the measurement data of that participant from the reference value. A data analysis method was proposed for calculating the degree of equivalences and their uncertainties. The method is based on processing spectral radiance ratios, rather than differences, which allows eliminating the influence of a result of one particular participant to results of other laboratories. The comparison results confirm the equivalence of spectral radiance scales of all the laboratories within their (k=2) expanded uncertainties except a few wavelength points.

The article gives an overview of activities of the Euro-Asian Cooperation of National Metrological Institutions (COOMET) on the organization of online events using videoconferencing technologies in the situation of the COVID-19 pandemic. The justification is given for the choice of the online-platform for holding official events under the auspices of COOMET. The effectiveness of the official meetings held online is assessed. The prospects for using online technologies in the organization of COOMET activities are substantiated.