Given a set  of  points in the plane and a constant ,-center problem is to find two closed disks which each covers the whole , the diameter of the bigger one is minimized, and the distance of the two centers is at least . Constrained -center problem is the -center problem in which the centers are forced to lie on a given line . In this paper, we first introduce -center problem and its constrain...

in order to improve the quality of education in universities of medical sciences (ums), and because of the key role of education development centers (edcs), an accreditation scheme was developed to evaluate their performance.a group of experts in the medical education field was selected based on pre-defined criteria by edc of ministry of health and medical education. the team, worked intensivel...