OpenSimulator Archive. OAR file is an OpenSimulator Archive. OpenSimulator is an open source multi-platform, multi-user 3D application server. It can be used to create a virtual environment (or world) which can be accessed through a variety of clients, on multiple protocols.
biological adaptation the adaptation of living things to environmental factors for the ultimate purpose of survival, reproduction, and an optimal level of functioning. color adaptation. 1. changes in visual perception of color with prolonged stimulation.
The Sorin Mitroflow is a bioprosthetic valve that is used to repair a damaged valve in patients with valvular heart disease. This type of heart valve is made from animal tissue and is often used in children born with congenital heart disease. It allows surgeons to repair a heart valve in children and young adults until they are old enough to receive a more durable mechanical valve. Bioprosthetic valves are expected to be replaced after 8 years, but surgeons are noticing that the Mitroflow valve is failing much earlier â sometimes in less than two to three years after placement.