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Jain received his bachelor's degree in 1972 from IIT Kanpur, and his MS and PhD degrees in 1974 and 1976 from the University of Delaware, all in chemical engineering.He served as assistant professor of chemical engineering at Columbia University (1976 to 1978), and as assistant (1978–79), associate (1979–83) and full professor (1983-1991) of chemical engineering at Carnegie Mellon University.
Mikrokator 509–4 C.E Johansson Eskilstuna Sweden. A Johansson Mikrokator (also called Abramson's movement) is a mechanical comparator used to obtain mechanical magnification of the difference in length as compared to a standard.
If these deviations are large, the surface is rough; if they are small, the surface is smooth. In surface metrology, roughness is typically considered to be the high-frequency, short-wavelength component of a measured surface. However, in practice it is often necessary to know both the amplitude and frequency to ensure that a surface is fit for ...
Surface metrology is the measurement of small-scale features on surfaces, and is a branch of metrology. Surface primary form, surface fractality, and surface finish (including surface roughness) are the parameters most commonly associated with the field. It is important to many disciplines and is mostly known for the machining of precision ...
Metrology of such a surface can confirm and ensure that the required degree of flatness has been achieved as a key step in a manufacturing processes. Two parts that are flat to about 1 helium light band (HLB) can be "wrung" together, which means they will cling to each other when placed in contact. This phenomenon is commonly used with gauge blocks
Metrology is the science of measurement and its application. [1] Main articles. Metrology; Measurement; Metrology overviews. Dimensional metrology;
In metrology and the fields that it serves (such as manufacturing, machining, and engineering), total indicator reading (TIR), also known by the newer name full indicator movement (FIM), is the difference between the maximum and minimum measurements, that is, readings of an indicator, on the planar, cylindrical, or contoured surface of a part ...
Engineering tolerance is the permissible limit or limits of variation in: a physical dimension; a measured value or physical property of a material, ...