Kt/V. In medicine, Kt/V is a number used to quantify hemodialysis and peritoneal dialysis treatment adequacy. In the context of hemodialysis, Kt/V is a pseudo-dimensionless number; it is dependent on the pre- and post-dialysis concentration (see below). It is not the product of K and t divided by V, as would be the case in a true dimensionless number. In peritoneal dialysis, it isn't dimensionless at all.
recovery - the act of regaining or saving something lost (or in danger of becoming lost) retrieval human action, human activity, act, deed - something that people do or cause to happen
Recovery (D): is a special partition on the hard drive used to restore the system in the event of problem. Recovery (D:) drive can be seen in Windows Explorer as a usable drive, you should not attempt to store files in it. Storing files can on the Recovery (D:) drive can cause the system recovery process to fail.