The article presents the results of studies on the improvement of the national primary standard machine on Rockwell and Superficial Rockwell scales GET 30-94. The modernized nodes of the standard machine were considered, its metrological characteristics were studied, the budget of measurement uncertainty at the reproduction of hardness numbers on Rockwell and Superficial Rockwell scales was calculated. During the improvement of the standard machine, 15 new hardness scales (not previously used in Russia) were introduced. The approved national primary standard machine on Rockwell and Superficial Rockwell scales GET 30-2018 corresponds to the best world analogues

Structure of the State Primary Standard GET 156-2015, intended for measurements of spectral regular transmittance, spectral diffuse and spectral regular reflectance in the wavelength range from 0,2 to 20,0 μm is presented. The metrological characteristics of the Standard are given

A general Lie algebra of quantum operators for coordinate, momenta and angular momenta for a quantum particle, that in the limiting case goes over to the Lie algebra of the canonical quantum field theory, is studied. Relations among spacetime operators for a quantum particle are considered. The operators are obeyed the general algebra dependent on three new fundamental constants with dimensions of mass ( M ), length ( L ) and action ( H ). Generalized HLM quantum fields and associated with them HLM quantum particles can be generated with the help of representations of this algebra. It is shown that a quantum measurement procedure should be modified to take into account the specific properties of the HLM quantum particles

A method is proposed and implemented that allows one to determine the count concentration in the suspension when measuring the particle sizes on the dynamic light scattering analyzer. The applicability of this method to various nanoparticles, including non-spherical ones, has been studied. An experimental sample of a dynamic light scattering analyzer capable of measuring the countable concentration of nanoparticles along with their size is presented

Two problems for atomic clock ensemble output signal generation are considered: generation of robust output signal, stable to frequency jumps in the reference clock, and smooth steering of time scale. Special algorithms are proposed to solve both problems. The work of the algorithms is demonstrated by numerical modeling

The article deals with the features of developed in "VREMYA-CH" JSC multichannel modem for transmission the reference signals of frequency and time on fiber with phase instability compensation. Its capabilities to transmit signals of reference frequencies with the quality of active hydrogen masers and 1 PPS with a synchronization error of about 250 ps at distances up to hundred kilometers are estimated. Experimental results of verification of its metrological characteristics are presented

The frequency stability improvement estimation of active hydrogen maser with single state selected beam has performed. The frequency stability caused by microwave cavity noises is . The frequency stability possible improvement in comparing with present hydrogen masers is 1,6 times

State selection system main design features are given with required limits. This system is a part of hydrogen maser physics package. Atomic trajectories modeling and inversion area design are reviewed

The main design features of onboard active hydrogen maser for “Millimetron” space mission are shown. State selection system development is discussed for frequency stability improvement. The frequency stability experimental results are given

Prototype of active hydrogen maser with state selection system is developed. Frequency stability measurement results are given. Active hydrogen maser with state selection system prototype design and the first frequency stability results are given .

The paper presents testing system based on usage of electro dynamic actuator (Lorentz). The actuator capable of controllable load over a range 10^-3 - 1 N. Specimen geometry change with an accuracy of 0,3 micrometers is achieved. The actuator is able to apply tension, bending, squeezing loads and periodic load for fatigue tests. The method could be applied for material characterization applications, such as microtensile testing of micrometer dimensioned films, wires, bending of millimeter-sized beams. The novel feature of our machine is that actuator is easily available and has zero stiffness

We propose the technique to calibrate the systems with multicomponent emitter and sensors. This technique includes the algorithm providing all parameters simultaneous determination. The magnetic field induction is measured at the set of reference points on the plane. The reference points form the uniform grid with square cell. As a result of measurements the goal function is built. The global multidimensional minima of goal function is to be found. The problem has the unique solution if one magnetic parameter (emitter component magnetic moment or sensor component transfer factor) is known a priori. We present also the method to estimate position error of multicomponent emitter and magnetic field sensor

The article considers the options for digital processing of magnetic induction signals obtained by solid-state sensors in working areas of electromechanical transducers in order to use the results in control and technical diagnostics tasks

Paper describes a method and electric circuit that allow to increase the dynamic range of signals and reduce the dynamic error of input cascades of the measuring equipment on the basis of operational amplifiers Rail-to-Rail. The experimental material is presented.

The method of calibration of signal simulators of global navigation satellite systems is presented. Defined valid values of metrological characteristics on the formation of the pseudo range. The method is based on the simultaneous high-frequency analog-to-digital conversion of the navigation signal and the second mark of the signal simulator time scale with subsequent digital demodulation, filtering, search for the transition of the corresponding front of the binary modulating sequence through zero and measurement of the time interval between the phase transition and the time stamp of the simulator scale. It is proposed to carry out sampling and recording of high-frequency signal of the simulator and its second mark in one time scale with subsequent demodulation of the recorded signal into quadrature components

The technique of modeling of the bipolar transistor 2T937 is presented. Results of calculations of static and frequency characteristics and assessment of an error of modeling of the bipolar transistor 2T937 are given. Problems of optimization of parameters of the model of Hummel-Poon taken as a basis when modeling the transistor are solved. It is shown that the created model can be used in computer-aided engineering systems as element base when developing transistor devices

The uneven nesses of the dose distribution along the body of the patient was assessed using in vivo dosimetry by semiconductor detectors under total therapeutic irradiation of cancer patients before bone marrow transplantation. The technique is developed and applied in N.N. Blokhin Russian Cancer Research Сenter since 2007. Dose measurements were performed in 35 patients. The uneven nesses of the dose distribution along the patient's body was estimated and averaged from 10 to 15%, which corresponds to international recommendations. The linear dependence of the accumulated dose on the body weight is shown.