This paper discusses how to make a distributed object system exible so as to satisfy the application's requirement in the change of the system environment. Each object supports other objects with quality of service (QoS). The change of the system is modeled to be the change of not only types of service but also QoS supported by the objects. We discuss equivalency and compatibility relations amo...

77) in the disciplines of health services research, health care evaluation , policy, health economics, quality improvement, management and clinical research focused on the quality of care and patient safety. For every paper, its keywords play a vital part for dissemination of its findings. These keywords are freely available to all users and get sent to many online sources, from which users und...