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    The Nature of Noise

    Edmonds, BM (2009) The Nature of Noise. In: Second International Workshop, EPOS 2006, 05 October 2006 - 06 October 2006, Brescia, Italy.

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    The idea of noise is now widespread in many fields of study. However to a large extent the use of this term is unexamined. It has become part of the practice of science without entering to a significant extent as part of its explicit theory. Here I try to produce a clearer and more coherent account of the term. I start with a picture of noise from electrical engineering. I then generalise this to the widest conception: that of noise as what is unwanted. A closely related conception is noise as what is unexplained. A particular case of this later usage is where a source of randomness can be used to stand-in for this residual. I argue that noise and randomness are not the same. I explore the possible relation between noise and context, and propose a new conception of noise: namely that noise is what can result from an extra-contextual signal. I finish with an application of the analysis of noise to the relation of determinism and randomness.

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