The aim of this study was to compare the preoperative patients' expectations with their postoperative satisfaction after arthroplasties of the hip and knee, using a visual analogue scale. The comparison was made in a group of 44 patients after 44 primary knee and hip joint arthroplasties. A visual analogue scale (VAS) was used for the assessment of expectation and satisfaction. The mean preoper...

We characterize triangle-free graphs for which there exists a subset of edges that intersects every chordless cycle in an odd number of edges (TF odd-signable graphs). These graphs arise as building blocks of a decomposition theorem (for cap-free odd-signable graphs) obtained by the same authors. We give a polytime algorithm to test membership in this class. This algorithm is itself based on a ...

Closed contours are often better perceived than those not fully enclosing an area, i.e., open contours. This facilitation of contour integration by closure, however, has been questioned arguing that in earlier studies closed contours were often "smoother" than open ones, because open contours usually had turning points. To solve this controversy, we compared detection performance for closed cir...