425 research outputs found
Transport coefficients and nonextensive statistics
We discuss the basic transport phenomena in gases and plasmas obeying the
-nonextensive velocity distribution (power-law). Analytical expressions for
the thermal conductivity () and viscosity () are derived by
solving the Boltzmann equation in the relaxation-time approximation. The
available experimental results to the ratio {}/ constrains the
-parameter on the interval . In the extensive limiting
case, the standard transport coefficients based on the local Gaussian
distribution are recovered, and due to a surprising cancellation, the electric
conductivity of a neutral plasma is not modified.Comment: 14 pages, 3 figures, REVTEX, submitted to PR
Accounting: A General Commentary on an Empirical Science
Many researchers have questioned the view of accounting as a science. Some maintain that it is a service activity rather than a science, yet others entertain the view that it is an art or merely a technology. While it is true that accounting provides a service and is a technology (a methodology for recording and reporting), that fact does not prevent accounting from being a science. Based upon the structure and knowledge base of the discipline, this paper presents the case for accounting as an empirical science
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