Journal of Research of the National Bureau of Standards: Engineering and instrumentation. C, Volumes 72-75U.S. Government Printing Office, 1968 |
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Page 2
... uncertainty in the determination of uncertainty of one part in a million in the measu of time results in an uncertainty of two parts in lion in g , but the length of the time interval increased to the point where timing errors become ...
... uncertainty in the determination of uncertainty of one part in a million in the measu of time results in an uncertainty of two parts in lion in g , but the length of the time interval increased to the point where timing errors become ...
Page 17
... Uncertainty in the Length Standard Of the two standards employed in the measure- ments , length and frequency , the length standard was by far the more critical in terms of the difficulty in obtaining the desired precision in its ...
... Uncertainty in the Length Standard Of the two standards employed in the measure- ments , length and frequency , the length standard was by far the more critical in terms of the difficulty in obtaining the desired precision in its ...
Page 18
... Uncertainty in the Final Result From the foregoing discussion of systematic error it is concluded that the principal known source of error of a systematic nature lies in the uncertainty in the value of the length standard . The uncertainty ...
... Uncertainty in the Final Result From the foregoing discussion of systematic error it is concluded that the principal known source of error of a systematic nature lies in the uncertainty in the value of the length standard . The uncertainty ...
Page 29
... uncertainties of the measurement are believed not to exceed the following : Piston gage parameters Mass and density of ... uncertainty would be about 56 ppm , or about 1.5 mm Hg . 3. Experimental Procedure 3.1 . Purification and Filling ...
... uncertainties of the measurement are believed not to exceed the following : Piston gage parameters Mass and density of ... uncertainty would be about 56 ppm , or about 1.5 mm Hg . 3. Experimental Procedure 3.1 . Purification and Filling ...
Page 33
... uncertainties in the published thermodynamic data used in the computations . For the water - air system , the ... uncertainty in relative humidity which varies from 1/8 to 1/4 percent . The time con- stant is a function of the gas ...
... uncertainties in the published thermodynamic data used in the computations . For the water - air system , the ... uncertainty in relative humidity which varies from 1/8 to 1/4 percent . The time con- stant is a function of the gas ...
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accuracy admittance alloys analysis application approximately atomic attenuation bolometer Bolovac bridge Bureau of Standards calculated calibration calorimeter capacitance capacitor Chem circuit coaxial coefficient connectors constant creep Cryogenic crystal curves density described detector determined dew point disk effect electrical electron electron probe microanalysis energy equation error evaluation experimental field film flow frequency function heat hydrometer IEEE impedance input Instr Instrumentation Vol Key words laser linear liquid load magnetic materials measurements ment meter method microwave Mössbauer effect Mössbauer spectroscopy National Bureau obtained optical oscilloscope output paper parameters percent Phys precision pressure Proc properties pulse radiation range ratio reference resistance resistors resonance sample shown in figure solution specimen spectra stress surface Tech techniques temperature thermal thermal conductivity thermocouple thermodynamic thiosulfate tion Trans tube tungsten uncertainty values vapor voltage waveguide wet-bulb wet-bulb temperature wire x-ray
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Page 28 - In no case does such identification imply recommendation or endorsement by the National Bureau of Standards, nor does it imply that the material or equipment identified is necessarily the best available for the purpose.
Page 46 - THE INSTITUTE FOR BASIC STANDARDS provides the central basis within the United States of a complete and consistent system of physical measurement; coordinates...
Page 25 - Passenger comfort is one of the most important factors to be considered in the design of these facilities and this also applies to the waiting rooms, rest rooms, lunch and dining rooms.
Page 21 - ... (1) nuclear data, (2) atomic and molecular data, (3) solid state data, (4) thermodynamic and transport data, (5) chemical kinetics, (6) colloid and surface properties, and (7) mechanical properties.
Page 82 - These include the development and maintenance of the national standards of measurement and the provision of means and methods for making measurements consistent with these standards...
Page 23 - The procedure uses the x and y coordinates and the individual directions of the minutiae ( ridge endings and bifurcations). The identity of the...
Page 22 - This publication contains a descriptive listing, item by item, of most of the test and calibration work done at the National Bureau of Standards with the respective fees.
Page 16 - Maryland, and by the Division of Biology and Medicine of the United States Atomic...