Index of cooperation
Encyclopedia
In telecommunication
, the term index of cooperation (diametral index of cooperation, international index of cooperation) has the following meanings:
Telecommunication
Telecommunication is the transmission of information over significant distances to communicate. In earlier times, telecommunications involved the use of visual signals, such as beacons, smoke signals, semaphore telegraphs, signal flags, and optical heliographs, or audio messages via coded...
, the term index of cooperation (diametral index of cooperation, international index of cooperation) has the following meanings:
- In facsimileFacsimileA facsimile is a copy or reproduction of an old book, manuscript, map, art print, or other item of historical value that is as true to the original source as possible. It differs from other forms of reproduction by attempting to replicate the source as accurately as possible in terms of scale,...
, the product of the total line length and the number of lines per unit length, divided by πPi' is a mathematical constant that is the ratio of any circle's circumference to its diameter. is approximately equal to 3.14. Many formulae in mathematics, science, and engineering involve , which makes it one of the most important mathematical constants...
. - For rotating devices, the product of the drum diameter and the number of lines per unit length.