Green Engineering Definitions

Martin, A. and Nguyen, N. Green engineering Definiting the principles - results from the Sandestin Conference. Environ. Progress. (December), 233-236, 2003. 

Green engineering, on the other hand, seeks to apply fundamental engineering concepts for the improvement of manufacturing processes. According to the definition promoted... 

A common definition of green chemistry, which clearly encompasses considerable chemical engineering as well, is the design, development and implementation of chemical processes and products to reduce or eliminate substances hazardous to human health and the environment, (P. T. Anastas and J. Warner, Green Chemistry Theory and Practice, Oxford University Press, Oxford, 1998). A more recent article expands this definition to twelve principles (M. Poliakoff, J. M. Fitzpatrick, T.R. Farren and P.T. Anastas, Science, 297, 807-810 (2002). 

It is now conventional wisdom to point out that chemical engineering is rapidly spreading into new technical areas described by such words as electronic materials, green chemistry, ecology, smart materials, drug-delivery systems, etc., etc., and above all, biotechnology. Because it is so difficult to give a contemporary definition of... 

Before proceeding, some definitions are useful. Stress is the ratio of the force on a body to the cross-sectional area of the body. The true stress refers to the infinitesimal force per (instantaneous) area, while the engineering stress is the force per initial area. Strain is a measure of the extent of the deformation. Normal strains change the dimensions, whereas shear strains change the angle between two initially perpendicular lines. In correspondence with the true stress, the Cauchy (or Euler) strain is measured with respect to the deformed state, while the Green s (or Lagrange) strain is with respect to the undeformed state. 

A thought experiment by [Green et al. 83] has led to the definition of the ideal architecture and functionalities of the software engineering environment of the future, namely the so-called KBS A Knowledge-Based Software Assistant). 

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