Sevoflurane, thiopental, and propofol depress components of the corticospinal volley produced by transcranial electrical stimulation of motor cortex in a manner qualitatively similar to isoflurane. The findings indicate that anesthetics with primarily hypnotic actions suppress interneuronal activity in cerebral cortex.

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These two companion papers a d d r e s s t h e design of Power System Stabilizers using an optimal reduced o r d e r model whose s t a t e variables a r e torque angles and speeds.The reduced o r d e r model retains t h e modes t h a t mostly affect these variables.A steady s t a t e e r r o r criterion is utilized to identify t h e modes that need to be retained. The effect of t h e other modes is compensated for through optimization of t h e steady s t a t e e r r o r criterion. The reduced o r d e r model i s used to design a linear feedback controller that takes into account the realities and constraints of electric power systems.Effectiveness of t h i s controller i s evaluated and examples, one machine-infinite b u s system and a multimachine system, a r e given to illustrate t h e advantages and effectiveness of t h e proposed approach.

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