to reduce stimulation to a minimum or to achieve "optimal" states of stimulation. The author's contention is that there is a drive for optimal levels of stimulation that leads organisms to avoid states where sensory variation is either too high or too low. This "sensoristatic drive" is a state of cortical arousal that is monitored by the reticular formation which serves as a regulator adjusting...

Hyperplanes and hyperplane complements in the Segre product of partial linear spaces are investigated. The parallelism of such a complement is characterized in terms of the point-line incidence. Assumptions, under which the automorphisms of the complement are the restrictions of the automorphisms of the ambient space, are given. An affine covering for the Segre product of Veblenian gamma spaces...

In this paper some properties of the complement of  a new graph  associated with a commutative ring  are investigated ....