Closure, Contrast, and Answer

Transitive Closure, Answer Sets and Predicate Completion

We prove that the usual logic programming definition of transitive closure is correct under the answer set semantics, and investigate under what conditions it is correct under the completion semantics. That definition is allowed here to be combined with an arbitrary set of rules that may contain negation as failure, not merely with a set of facts. This work is motivated by applications to answe...

Transitive Closure, Answer Sets and Predicate Completion

Transitive Closure, Answer Sets and Predicate Completion

The role of contrast polarity in perceptual closure

Perceptual closure is one of the principles by which the visual system groups disjointed contour segments belonging to a single object. Recently it has been reported that grouping based on perceptual closure operates only upon contour elements of a consistent contrast sign and is eliminated when closed contours contain contrast reversing segments [Elder, J. & Zucker, S. (1994) A measure of clos...

Comparison of Primary Wound Closure with Vacuum Drainage and Delayed Closure in Perforated Appendicitis

Open wound managment after perforated appendicitis has been a common practice but recently, primary closure has been advocated to reduce costs and morbidity. For comparing delayed closures against primary closure with vacuum drainage, a randomized experimental study was designed. in Kerman. Sixty patients with perforated appendicitis divided randomly in two groups and evaluated on day of discha...