A structure of the national primary permittivity unit standard of the frequency range from 10 Hz to 10 MHz is presented. The measurement methods for dielectric permittivity and tangent of dielectric loss are described. Metrological characteristics of the standard and measurement results of dielectric parameters of the standard reference specimens are given.

Distribution of statistics of classical tests of homogeneity of variances (Neyman-Pearson, O´Brien, Link, Newman, Bliss-Cochran-Tukey, Cadwell-Leslie-Brown, Overall-Woodward Z- variance and modified Overall-Woodward Z- variance tests) is investigated, including the case when the common assumption of normality is violated. The comparative analysis of power of the classical tests is carried out.

The problem of calculating a posteriori reliability of calibration of measuring instruments in terms of unequal accuracy in tolerance control systems and its realization by software is considered.

The methods of determining the parameters of harmonic signals on individual instantaneous values, which provide a significant abbreviation of measurement time, are considered. When implementing methods the time of determining the parameters does not depend on the beginning of the measurement, the duration of the input signal period and the phase angle between voltage and current.

The article considers the problem of determining the errors of a mutual clock synchronization, satellite navigation constellation, as well as the problem of determining the errors of the transmitters and receivers of navigation satellites. The received object parameters are used to compensate for these errors, the refinement of coordinates of navigation satellites and increase accuracy of navigation.

In the paper the design and operation mode of the CsFO2(SU) fountain-type cesium frequency standard developed at the All-Russia Research Institute of Physicotechnical and Radio Measurements(VNIIFTRI) are presented. The evaluation procedure for the systematic frequency shifts and corresponding uncertainties are shown. Currently the frequency uncertainty (type B) of CsFO2 is 2,5·10^-16.

Results of form factor computations for a flat ring using linear elasticity theory formulation, which take into account the influence of sample sizes and Poisson's ratio on the measured modulus of elasticity are presented. The noslip conditions at the ring plane faces is assumed. The results are based on a numerical solution of two-dimensional elastic deformation problems for the rings with given boundary conditions over its entire surface. Six flat rings with different sizes were manufactured and their elastic modulus was measured to validate the results of computations. The scattering of Young's modulus corrected with the help of the form factor does not exceed 2.5%, which is within the range of errors of the elastic modulus measurement technique.

Calculation is made of dependence of a signal of a heat flow sensor, which is a battery with Borelius elements assembled using soldered patch and adhesive insulating layers, on time as well as the size of design elements of the sensor and thermal parameters of structural materials. The comparison of the calculated and experimental results is carried out. On the basis of the obtained data the ways to improve the performance speed of such heat flow sensors are suggested.

An automated measuring complex is presented to measure frequency and current dependence of the module and phase of thermal impedance of light-emitting diodes and LED arrays of 100-Watt and more. The measurement principle of the automated complex is based on passing through a light-emitting diode of sequence of impulses of direct current, pulse-width modulated by the law of harmony, and on measurement of a variable of p-n temperature transition at frequency modulation of change of a voltage drop on p-n transition at a small parallel flow in pauses between thermal impulses. An algorithm is described, defining components of thermal impedance of a light-emitting diode by the results of processing of frequency characteristics of the module and a phase of thermal impedance. Examples of realization of algorithm are given.

The original structure for creating the integrate devices, enabling to increase the integration accuracy in the range of the super-low frequencies, is presented. Reduction of the error of integration is mathematically proved to be provided by the increase in the order (number of the integrating links) of the integrating device. The results of the calculations, demonstrating the integration accuracy increase dependence on the frequency of two and three-unit integrators for different ratios of the time constants links, are given.

Solutions to expand the dynamic range of the spectral measurements of the low-level signal parameters through their artificial noising are obtained and proved.

A mathematical model for measurement data processing during reflectance and transmittance of radar absorbent material characterization with ultra-short pulse sounding was proposed. There were argued a kernel smoothing for measuring instruments noise elimination and window Fourier transform for transition to frequency domain. Random and systematic errors were expressed.

The results of experimental studies are presented of testing the antenna element determining the long-wavelength components of wall pressure fluctuations, the design implementation of which is based on the receiver's location in a cavity under the fine mesh grid. The optimal size of the element is defined, at which the maximum averaging of short wavelengths is realized. A method for determining of its effectiveness is suggested.

A radiation-hard diamond-based detector for the registration of cosmic ray particles with low linear energy transfer has been developed and investigated. The device can be used for detection of gamma-radiation of PWR-type of nuclear reactors. The characteristics of the detector, when exposed to beta radiation, have been determined experimentally. The simulation of the detector signals, when exposed to beta and gamma radiation, has been carried out. The analysis of the results shows that the use of multi-layered diamond structure can increase the signal-to-noise ratio and measurement dynamic range of linear energy transfer of cosmic-ray particles.

The experimental method is described and the measurement results of the value of polarizability of erythrocytes and latex particles in a non-uniform alternating electric field are presented. The results show that the values of experimentally measured and theoretically calculated polarizability of latex particles are in good agreement.

Operations for calibration and verification of liquid and aerosol particle counters are described. Typically, calibration of an aerosol particle counters is performed using latex spheres of known size. However, depending on the design of counters, light intensity, scattered by particles, is recorded at various angles. It is shown that registration of the scattered light at an angle of 90° that is inherent for most popular particle counters, leads, without a priori specified refractive index of the detected particles, to large measurement errors. Registration of the scattered light in the whole solid angle significantly reduces measurement error. Metrological characteristics of counters in their design were analyzed.

The article discusses the influence of the capillary properties of liquids for verification of working hydrometer for ethanol at the level corresponding to the distilled water. The essential difference between the correction values that are obtained by comparison and hydrostatic weighing at the test point is shown. It is found that the contact angle at 0 vol.% point depending on the diameter of the stem and significantly affects the difference between the results of hydrometer verification methods. The dependence of the contact angle by the diameter of the stem was calculated.

The shielding of water protons was determined for temperatures in the range typical of living tissues. When using the comparison of the temperature shift of the signal of the water and the temperature shift of the signal of hydrogen. Tabulated data are present to determine the induction of the magnetic field at different temperatures using spherical samples, as well as cylindrical with their orientation parallel and perpendicular to the magnetic field lines. The temperature of brain tissue was estimate based on the accumulation of magnetic resonance spectra without suppression of the water signal.