The presence of symmetry is common in certain types of scheduling problems. Symmetry can occur when one is scheduling a collection of jobs on multiple identical machines, or if one is determining production schedules for identical machines. General symmetry-breaking methods can be strengthened by taking advantage of the special structure of the symmetry group in scheduling problems. In this pap...

Background: Nurses’ working environments, especially operating rooms are stressful environments due to their undesirable factors and conditions. The present study was conducted to determine sources of occupational stress among operating room nurses of hospitals affiliated to universities of medical sciences in Kerman, Iran. Materials and Methods: This cross-sectional study was carried ou...

OBJECTIVES To analyze the characteristics of the dermatologic surgery lists and to compare different indicators of surgical productivity. MATERIALS AND METHODS This was a retrospective, descriptive study of the routine surgical activity undertaken in the Dermatology Department of Fuenlabrada University Hospital, Madrid, Spain, between January 2005 and December 2010. Data about the procedures ...

aim and background:   long exposure to inhalant anesthetic gases especially halothane, among the known hepatotoxic agents, is a serious health risk for the staff of operating room. current study was performed to compare the level of hepatic enzymes between operating&aposs; room staff and other therapeutic wards’ personnel out of the operating room. methods and materials:   a total of 100 person...