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Input is the term denoting either an entrance or changes which are inserted into a system and which activate/modify a process. It is an abstract concept, used in the modeling, system(s) design and system(s) exploitation. It is usually connected with other terms, e.g., input variable, input parameter, input value, input signal and input device.
From the most general systemics perspective, input is a subjective concept and depends on how the system is used. In such sense, the same system can have different inputs in different applications.
In the case of a process description/model, the concept input is closely connected with the concept output. Here, what enters is called input and what exits is called output.
Example: For an abstract system A(x,y,p), where x,y are variables and p is a parameter, x may denote input (variable) and y may denote the output for a process: y = f(p,x), but, for another goal/(system application), the system A can be the carrier of a process x = g(p,y), where y is an input and x is an output.[citation needed]
Usually, in the modeling of a problem/process, input are these variables which are known and output are those unknown to us yet.
In different contexts, input has several more concrete domain-dependent meanings.
Last edited by coolcat; 2 Nov 2006, 11:34 AM.
Reason: clarification
What you are trying to do is outside the scope of "fair use", you haven't
purchased the rights to those broadcasts like you would if you had bought a dvd, HBO and others have successfuly argued this and that view prevails.
I don't think we need to go down this road any further.
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