This page should give you a chance to quickly discover what could be a true economical approach, based upon the concept of functional and organizational cost in a neural network, for analyzing behaviour and activity regulation over time.
Please have a look on a paper abstract (in english) in which the functional cost is defined. (Reprints on query in HTML format).
Recent papers (I'll be glad to send you a reprint if you ask for):
C. Lecerf, "The double loop as a model of a learning neural system", SCI'98 Proceedings, vol. 1, pp 587-594, Orlando, July 12-16, 1998.
C. Lecerf, "Double loop flows and bidirectional Hebb's law in neural networks", to appear in VI-DYNN'98 Proceedings, Stockholm, June 22-26, 1998.
C. Lecerf, "Short and long term memories in a double loop neural model", to appear in ICNN&B'98 Proceedings, Beijing, October 27-30, 1998.
E-mail me your questions and reprints query at : cl AT mire.net