The concentricity error is used in conjunction with tolerance fields to specify or characterize optical fiber core and cladding geometry.

The advantage of using a combination reamer is to reduce the number of turret operations, while more precisely holding depths, internal diameters and concentricity.

( The axial movement of cones is not mandatory, however ; a split bushing squeezed radially with a linear force — e. g., set screw, solenoid, spring clamp, pneumatic or hydraulic cylinder — achieves the same principle without the cones ; but concentricity can only be had to the extent that the bushing's diameters are perfect for the particular object being held.

It is simple and useful, but the degree of control of concentricity is not quite good enough to be foolproof for high-speed, high-precision work ( high precision can be achieved, but the time and skill involved in the setups makes it a poor choice now that better options exist, such as the cam-lock spindle noses described below ).

The exact-adjust ( Set-Tru ) concept is one way to chase high concentricity on threaded spindle noses with some relative degree of ease.

The preservation of concentricity between the turning and grinding operations is crucial for quality work.

The name comes from the concept of indicating to the user that which their naked eye cannot discern ; such as the presence, or exact quantity, of some small distance ( for example, a small height difference between two flat surfaces, a slight lack of concentricity between two cylinders, or other small physical deviations ).

This ability may also include the additional ability to infer the correct relationships between selected geometry ( e. g., tangency, concentricity ) which makes the editing process less time and labor intensive while still freeing the engineer from the burden of understanding the models.

In either case, the tip of the counterbore has a reduced diameter section referred to as the pilot, a feature essential to assuring concentricity between the counterbore and the hole being counterbored.

Tolerances of concentricity of the hob limit the lower modules which can be cut practically by hobbing to about 0. 5 module.

The efficiency of the Kylchap system relied on careful proportioning of its components, and perfect alignment and concentricity.

The scriber block may also be used in place of a dial indicator to detect run out ( a variation in concentricity ) of a workpiece mounted in a four-jaw chuck.

There are hybrid self-centering chucks that have adjustment screws that can be used to further improve the concentricity after the workpiece has been gripped by the scroll jaws.

This system improves the repeatability of the mounting concentricity down to a very small total indicated runout ( TIR ) value.

In September 1978, the company demonstrated an optical digital audio disc with a 150 minute playing time, 44, 056 Hz sampling rate, 16-bit linear resolution, and cross-interleaved error correction code — specifications similar to those later settled upon for the standard Compact Disc format in 1980.

The Red Book specifies the physical parameters and properties of the CD, the optical " stylus " parameters, deviations and error rate, modulation system ( eight-to-fourteen modulation, EFM ) and error correction facility ( cross-interleaved Reed – Solomon coding, CIRC ), and the eight subcode channels.

Main characteristics of this kind of optical wireless communication is physically secure data transfer, Line-of-Sight ( LOS ) and very low bit error rate ( BER ) that makes it very efficient.

where is the optical phase error introduced by atmospheric turbulence, R ( k ) is a 2 dimensional square array of independent random complex numbers which have a Gaussian

Version 1 and 2 archive files were often used in conjunction with a parchive file archiver to create parity files for error recovery when using less-than-perfect file transmission and storage media such as newsgroups, satellite transmission, and optical discs.

The error rate for the magnetic scanning of a typical check is smaller than with optical character recognition systems.

Already a professor in Jena, he was hired by Carl Zeiss to improve the manufacturing process of optical instruments, which back then was largely based on trial and error.

If an optical system is not axisymmetric, either due to an error in the shape of the optical surfaces or due to misalignment of the components, astigmatism can occur even for on-axis object points.

The diagnosis of a refractive error is usually confirmed by an eye care professional during an eye examination using an instrument called a phoropter which contains a large number of lenses of varying optical power.

" With an error radius of about 110 meters ( 120 yards ) at a range of, Oboe was about as good as optical bombsights.

* Parity inner error, an error at the first (“ inner ”) stage of error correction when reading from DVD optical disc ; considered as a quantitative measure of disc quality, but not as relevant as parity outer error on later stages

At shorter ranges the point of aim will change position based on eye position with the maximum error being equal to the diameter of the sight's optical window at short range.

Many sights utilize a type of mangin mirror system, consisting of a meniscus lens corrector element combined with the semi-reflective mirror ( what Aimpoint's advertising calls a " two lens " or " double lens " system ), that compensates for off axis spherical aberration, an error that can cause the dot position to diverge off the sight's optical axis with change in eye position.

Catoptrics and optical fiber have no chromatic aberration, while dioptrics need to have this error corrected.

The terminal stations in land crossings use optical amplifiers, high performance transmitter / receivers and forward error correction to cross the large distances without repeaters.

Climbing fiber activation is thought to serve as a motor error signal sent to the cerebellum, and is an important signal for motor timing.

There is no room for error or waste.

To my knowledge, Lincoln remains the only Head of State and Commander-in-Chief who, while fighting a fearful war whose issue was in doubt, proved man enough to say this publicly -- to give his foe the benefit of the fact that in all human truth there is some error, and in all our error, some truth.

So great a man could not but understand, too, that the thing that moves men to sacrifice their lives is not the error of their thought, which their opponents see and attack, but the truth which the latter do not see -- any more than they see the error which mars the truth they themselves defend.

Their great error is to mingle the responses typical of each of the three types of change.

Without a precise knowledge of Germanic philology, however, it is debatable whether their use was not more often a source of confusion and error than anything else.

The observational data determining the concentration distribution have a range of error which is magnified in the extension into the micrometeorite region.

Another problem in the area of federal-state relationships is this: what constitutes reversible error in a state decision??

If the polarity is correct, the platform will turn until the heading error angle is zero.

If the drift error is systematic, it can be canceled with a bias circuit which can be arranged and adjusted to supply the required compensating current.

The point is at a latitude **yl, and the platform is at an error in heading east.

Such talk is seriously in error.

He has a pleasant sense of humor and is modest enough to admit mistakes and even `` a cardinal error ''.

He contends this idea doesn't conflict with experiments on which the principle of conservation of matter and energy is based because some slight error must be assumed in such experiments.

It allows compact encoding, but is less reliable for data transmission ; an error in transmitting the shift code typically makes a long part of the transmission unreadable.

( It follows that the mean is also the best single predictor in the sense of having the lowest root mean squared error.

The Type II error rate is a function of several things including

the result of the effect and is partially random error.

Random error is typically assumed to be normally distributed with zero mean and a constant variance.

Random error is also called experimental error.

The number of degrees of freedom DF can be partitioned in a similar way: one of these components ( that for error ) specifies a chi-squared distribution which describes the associated sum of squares, while the same is true for " treatments " if there is no treatment effect.