A study of the hydrogen line profiles indicates that a measurement of these profiles can be used to calculate a temperature for the arc plasma that is reliable to about Af percent.

A tire must be inflated to its normal hot operating pressure and the car must be loaded to its operating weight when this measurement is made.

This pressure measurement may be made at the same time that the ultrasonic dimensioning measurement is made.

The elasticity is a parameter of fluids which is not subject to simple measurement at present, and it is a parameter which is probably varying in an unknown manner with many commercial materials.

However, as a field measurement, it is open to question.

A second factor which enters into the practical measurement of the instrumentally determined cutting force is the frictional resistance caused by the bottom of the knife against the substrate.

One benefit is that the statistical moment calculations can be carried out to arbitrary accuracy such that the computations can be tuned to the precision of, e. g., the data storage format or the original measurement hardware.

Chemical analysis is an important element of national security among the major world powers with materials measurement and signature intelligence ( MASINT ) capabilities.

As the speed of light in meters per second ( c < sub > 0 </ sub >) is fixed in the International System of Units, this measurement of the speed of light in AU / d ( c < sub > AU </ sub >) also determines the value of the astronomical unit in meters ( A ):

The SI unit of measurement of electric current, the ampere, is named after him.

Absolute temperature measurement is uniquely determined by a multiplicative constant which specifies the size of the " degree ", so the ratios of two absolute temperatures, T < sub > 2 </ sub >/ T < sub > 1 </ sub >, are the same in all scales.

Its length as measured by the United States Geological Survey is, and by steamboat measurement,.

It is a measurement, although the degree of specificity may not be easy to measure, and need not be linear or of the nature of a rate-limited step or equation.

For a meteor, the standard distance for measurement of magnitudes is at an altitude of at the observer's zenith.

Quantitative analysis is achieved by measurement of weight or volume.

Analytical chemistry is also focused on improvements in experimental design, chemometrics, and the creation of new measurement tools to provide better chemical information.

If the amount in the sample is below an instrument's range of measurement, the method of addition can be used.

A minute of arc, arcminute, or minute arc ( MOA ), is a unit of angular measurement equal to one sixtieth () of one degree (), or () radians.

Ionization is generally undesirable, as it reduces the number of atoms that is available for measurement, i. e., the sensitivity.

In LS AAS the high resolution that is required for the measurement of atomic absorption is provided by the narrow line emission of the radiation source, and the monochromator simply has to resolve the analytical line from other radiation emitted by the lamp.

The manometer measured depth of ± at for the Challenger Deep is believed to be the most accurate measurement taken yet.

If the depletion layer is large enough to catch the whole shower or to stop a heavy particle, a fairly accurate measurement of the particle ’ s energy can be made, simply by measuring the charge conducted and without the complexity of a magnetic spectrometer, etc.

Because of energy loss fluctuations, accurate measurement of the energy deposited is of less use.

Although there are computational methods that can be used to estimate the behavior of a mixture of arbitrary components, the only way to obtain accurate vapor-liquid equilibrium data is by measurement.

Astronomers had believed for some time that parallax would provide the first accurate measurement of interstellar distances — in fact, in the 1830s there was a fierce competition between astronomers to be the first to measure a stellar parallax accurately.

Another, more accurate, measurement of the speed of light was performed in Europe by Hippolyte Fizeau in 1849.

Although conversion from wavelengths to metres introduces an additional error in the overall length due to measurement error in determining the refractive index and the frequency, the measurement of frequency is one of the most accurate measurements available.

In particular, the field has made great advances in the understanding of the relationship between the atomic-scale structure of minerals and their function ; in nature, prominent examples would be accurate measurement and prediction of the elastic properties of minerals, which has led to new insight into seismological behaviour of rocks and depth-related discontinuities in seismograms of the Earth's mantle.

The composition of gases at high vacuums will usually be unpredictable, so a mass spectrometer must be used in conjunction with the ionization gauge for accurate measurement.

* The Space Fence is envisaged to be a system of two or three S-band ground-based radars designed to perform uncued detection, tracking and accurate measurement of orbiting space objects.

* Scintigraphy ( nuclear medicine ) for accurate measurement of renal function ( rarely done ), and MAG3 scans for diagnosis of renal artery disease or ' split function ' of each kidney ;

As a consequence, an accurate measurement of the earth ’ s axial reorientation relative to objects outside the frame of the moving galaxy ( such as distant quasars commonly used as precession measurement reference points ) must account for a minor amount of non-local torque-free precession, due to the solar system ’ s motion.

Since radio waves travel at the speed of light, accurate distance measurement requires high-performance electronics.

The Wheatstone bridge illustrates the concept of a difference measurement, which can be extremely accurate.

* Friedrich Bessel makes the first accurate measurement of distance to a star.

They measure ingredients by weight instead of by volume, because measurement by weight is much more accurate and consistent than measurement by volume, especially for the dry ingredients.

Though still in limited use, the QFE has been superseded by much more accurate radiation measurement devices.

" Time domain reflectometry: Calibration techniques for accurate measurement of the dielectric properties of various materials ".

In Europe, it is preferable to apply a ITU-R BS. 468 weighed curve, which is intended to accentuate what is most audible to the human ear, contributing to a more accurate measurement.

Accuracy indicates proximity of measurement results to the true value, precision to the repeatability or reproducibility of the measurement A measurement system can be accurate but not precise, precise but not accurate, neither, or both.

Throughout their careers, both Mr. Brown and Mr. Sharpe were interested in the problem of setting up standards of measurement for the mechanical trades.

Two pyrometers shown in figure 1 and 2 ( Pyrometer Instrument Co. Model 95 ) served for simultaneous measurement of the anode surface temperature and the temperature distribution along the anode holder.

The face of one block contained a hole 1/16'' '' in diameter which led to a manometer for the measurement of the normal pressure.

They also give information which will aid in the design of a more satisfactory instrument for the measurement of the normal pressures.

The temperature was maintained to within about Af for the period of time required to make the measurement ( usually about one hour ).

He made the first measurement of stellar parallax: 0. 3 arcsec for the binary star 61 Cygni.

In 1976 the International Astronomical Union ( IAU ) revised the definition of the AU for greater precision, defining it as that length for which the Gaussian gravitational constant ( k ) takes the value when the units of measurement are the astronomical units of length, mass and time.

When a continuum radiation source is used for AAS measurement it is indispensable to work with a high-resolution monochromator.

As measurement of total and background absorption, and correction for the latter, are strictly simultaneous ( in contrast to LS AAS ), even the fastest changes of background absorption, as they may be observed in ET AAS, do not cause any problem.

* Arbitrary unit, a relative placeholder unit for when the actual value of a measurement is unknown or unimportant

* Appreciation Index, a measurement of approval for television programmes or services in the United Kingdom

Hot-wire anemometers, while extremely delicate, have extremely high frequency-response and fine spatial resolution compared to other measurement methods, and as such are almost universally employed for the detailed study of turbulent flows, or any flow in which rapid velocity fluctuations are of interest.

The time taken for the output to settle to within a certain percentage of the final value ( for instance 0. 1 %) is called the settling time, and is usually specified for oscilloscope vertical amplifiers and high accuracy measurement systems.

The GSI team further studied the reaction in 1989 and discovered the new isotope < sup > 261 </ sup > Bh during the measurement of the 1n and 2n excitation functions but were unable to detect an SF branching for < sup > 261 </ sup > Bh.

In 1794, this fortress was used by the French astronomer Pierre François André Méchain for observations relating to a survey stretching to Dunkirk that provided the official basis of the measurement of a metre.

The standard anthropometric measurement for young women is.

* Benchmark ( surveying ), a point of reference for a measurement

These concepts include one-to-one correspondence ( the basis of counting ), comparison to a standard ( used for measurement ), and the 3-4-5 right triangle ( a device for assuring a right angle ).