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Square threads are defined as follows by ISO standards: . where Sq designates a square thread, 60 is the nominal diameter in millimeters, and 9 is the pitch in millimeters. When there is no suffix it is a single start thread.
In order to simplify the handling of 35 mm film in 135 format cartridges, Kodak introduced the DX encoding method on 3 January 1983. [1] [2] In contrast to the film speed encoding method developed by Fuji in 1977, [3] which used electrical contacts for film speed detection on 135 format cartridges, [4] Kodak's DX encoding system immediately met ...
Simplification is the process of replacing a mathematical expression by an equivalent one that is simpler (usually shorter), according to a well-founded ordering. Examples include:
Standard 8 mm film, also known as Regular 8 mm, Double 8 mm, Double Regular 8 mm film, or simply as Standard 8 or Regular 8, is an 8 mm film format originally developed by the Eastman Kodak company and released onto the market in 1932. Super 8 (left) and Regular 8 mm (right) film formats. Magnetic sound stripes are shown in gray.
According to historian Doug Kerr, the S-mount was developed and released in 1933 to simplify the profusion of lens mounts for the line of Ciné-Kodak 16 and 8 mm movie cameras; at the time, many of the lens mounts were unique to the particular camera model, and the line of Kodak ciné lenses for 16 mm cameras spanned a range of focal lengths from 15 to 152 mm.
Today, a more standard phrasing of Archimedes' proposition is that the partial sums of the series 1 + 1 / 4 + 1 / 16 + ⋯ are: + + + + = +. This form can be proved by multiplying both sides by 1 − 1 / 4 and observing that all but the first and the last of the terms on the left-hand side of the equation cancel in pairs.
a 1 = 2, a 2 = 4, a 3 = 8,... The sequence of forward differences is then Δa 0 = a 1 − a 0 = 2 − 1 = 1, Δa 1 = a 2 − a 1 = 4 − 2 = 2, Δa 2 = a 3 − a 2 = 8 − 4 = 4, Δa 3 = a 4 − a 3 = 16 − 8 = 8,... which is just the same sequence. Hence the iterated forward difference sequences all start with Δ n a 0 = 1 for every n. The ...
The basic form of a 2-dimensional thin film equation is [3] [4] [5] = where the fluid flux is = [(+ ^) + ^] +, and μ is the viscosity (or dynamic viscosity) of the liquid, h(x,y,t) is film thickness, γ is the interfacial tension between the liquid and the gas phase above it, is the liquid density and the surface shear.