Results 251 to 260 of about 27,090,668 (309)

Contemporary status of the state primary standard of the unit of mass

Measurement Techniques, 2009
The results of studies designed to improve the State Primary Standard of the unit of mass are considered. In terms of precision of reproduction and stability, the Russian prototype of the kilogram corresponds to the best world analog. Modern electronic comparators of the mass from the world’s leading firms are introduced into the standard.
Yu. I. Kamenskikh, V. S. Snegov
openaire   +1 more source

State Primary Standards in the Area of Radiometry of Ultraviolet Radiation

Measurement Techniques, 2005
The present article describes the system used for assurance of the uniformity of measurements of the characteristics of ultraviolet radiation in the wavelength band 0.03–0.40 μm for radiation sources and receivers based on the State Primary Standards of the unit of spectral density of radiance as well as the unit of radiant flux and unit of irradiance.
S. I. Anevskii, A. E. Vernyi, O. A. Minaeva, O. Yu. Morozov   +3 more
openaire   +1 more source

Standards for Primary-Grade Reading: An Analysis of State Frameworks

The Elementary School Journal, 1999
The purpose of this article is to analyze state standards for early reading/language arts from 2 perspectives-what is known about standards and what is known about early reading. Guided by criteria that address equity, content, and specificity established by the Council of Chief State School Officers in collaboration with 9 other educational ...
Karen K. Wixson, Elizabeth Dutro
openaire   +1 more source

The state primary standard for the unit of mean laser power

Measurement Techniques, 2007
An upgraded state primary standard is considered for the unit of mean laser radiation power. The technical characteristics and working principle are given.
V. S. Ivanov, A. F. Kotyuk, A. A. Liberman, S. A. Moskalyuk, M. V. Ulanovskii   +4 more
openaire   +1 more source

State primary standard of the unit of electric resistance ? Ohm

Measurement Techniques, 1971
The following conclusions can be made as a result of investigations of the state standard of the unit of resistance. 1. The state resistance standard ensures maintenance of the unit of resistance and the assignment of its value to secondary standards with an error error of 1 · 10−7, which indicates a sufficiently high metrological level.
I. N. Krotkov, V. P. Shigorin
openaire   +1 more source

Modernized state primary standards of the units of thermal quantities

Measurement Techniques, 2009
The content and results of efforts to modernize the three State Primary Standards of the units of temperature in the 0–3000°C range and also of the standards of thermal conductivity and coefficient of linear expansion of solids, stored at the Mendeleev Research Institute of Metrology, are described.
A. I. Pokhodun, T. A. Kompan, N. A. Sokolov, S. F. Gerasimov, M. S. Matveev, V. A. Nikonenko, A. S. Korenev, N. V. Churilina   +7 more
openaire   +1 more source

State primary standard for the unit of direct current, the ampere

Measurement Techniques, 1995
The new state primary standard for direct current is described, together with its block diagram and accuracy parameters. The accuracy of realization is improved by two orders of magnitude (standard deviation 5–10−8, residual systematic error 2·10−7). The range of current realization in the standardis extended to 10−16 A.
A. S. Katkov, O. M. Pavlov, O. P. Galakhova, V. I. Krzhimovskii, E. D. Koltik   +4 more
openaire   +1 more source

Means of transferring the dimension of the volt from a primary standard to solid-state voltage standards

Measurement Techniques, 1995
A reference-voltage set and a Josephson-voltage converter developed at the D. L Mendelev All-Union Scientific-Research Institute of Metrology extend the range of reproducible voltages to 0.1–10 V. The error of reproducing and transferring the unit in the range 6–10 V by means of solid-state standards as well as digital voltmeters is less than 9.4·10−9.
V. I. Krzhimovskii, A. S. Katkov, V. �. Lovtsyus   +2 more
openaire   +1 more source

State primary voltage standard of the fourth generation

Measurement Techniques, 2023
A. S. Katkov, V. I. Shevtsov, Ju. A. Gromova   +2 more
openaire   +1 more source

The state primary standard of the unit of heat-flux surface density

Measurement Techniques, 2009
The results of the construction of the State Primary Standard of the unit of heat-flux surface density at the Siberian State Research Institute of Metrology are considered.
O. M. Lozinskaya, N. I. Rybak, V. Ya. Cherepanov, E. M. Sheinin, V. A. Yamshanov   +4 more
openaire   +1 more source