Results 251 to 260 of about 1,753,234 (312)

The state primary standard for the unit of refractive index

Measurement Techniques, 2004
The structure, working principle, and basic metrological characteristics are given for the State primary standard for a unit of refractive index GET 138-2003.
G. N. Vishnyakov, G. G. Levin, S. V. Kornysheva   +2 more
openaire   +1 more source

GET 186–2017 State Primary Standard of Units of Ellipsometric Angles

Measurement Techniques, 2020
The composition, operating principle, and basic metrological characteristics of GET 186–2017, the State Primary Standard of units of ellipsometric angles, a Standard that supports measurement of the two-dimensional spatial distribution of ellipsometric angles, are described. The structure of GET 186–2017 includes a spectral ellipsometer equipped with a
G. N. Vishnyakov, G. G. Levin, V. L. Minaev   +2 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

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

State Primary Special Standard Get 190-2019 for Acceleration in Gravimetry

Measurement Techniques, 2020
The composition, principle of operation and basic metrological characteristics of the State Primary Special Standard of acceleration for gravimetry GET 190-2019 are given. The standard is the top link of the reference base for gravitational acceleration measurements.
L. F. Vitushkin, F. F. Karpeshin, E. P. Krivtsov, P. P. Krolitsky, V. V. Nalivaev, O. A. Orlov, M. M. Khaleev   +6 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

Primary state reference standard for the unit of pressure ? The pascal

Measurement Techniques, 1972
Investigations of the primary state standard for the unit of pressure carried out at the VNIIM have led to the following conclusions.
E. F. Dolinskii, G. I. Loskutov, G. I. Polukhin   +2 more
openaire   +1 more source

State primary standard of unit for torque GET 149-2023

Izmeritel`naya Tekhnika
The problems of metrological support for high-precision torque measuring instruments, which have a measurement range that includes torque values of less than 1.0 N·m, are considered. The areas of activity in which torque measurements are important are shown.
B. A. Cherepanov, P. V. Migal, G. V. Horkov   +2 more
openaire   +1 more source

Laser Interferometric Mercury Manometer of State Primary Standard Get 101–2011

Measurement Techniques, 2015
The design and operating principle of a laser interferometric mercury manometer functioning as a component of State Primary Standard GET 101– 2011 of the unit of pressure for the region of absolute pressure in the range 1·10−1–7·105 Pa are described. The manometer utilizes a cats’-eye type floating device that dampens the surface waves of the mercury ...
I. V. Sadkovskaya, A. I. Eykhval’d
openaire   +1 more source