From Page 123 of DW; The Meditation Talent Description
Success on a Willpower Test and 10 minutes without interruptions removes one level of fatigue.
From page 251 of DW; Removing Fatigue
Each 10 minutes of normal rest that includes no combat, no psychic powers and no strenuous activity removes one level of fatigue.
How exactly is the Talent (which costs a Rank 3 Librarian 500 advance points) an advantage ?
Librarians with one of the 2 force field powers could, in theory, turn them on and kick back and meditate while maintaining them and remove fatigue while still providing their bonus (more likely with the DA's Force Barrier than the bubble since it works against everything, and at rank 3 you can push it to nearly impenetrable levels vs anything not a powerfist/lascannon). Assuming nothing gets luck and hurts the librarian during this time period that is, since Med doesn't have the stipulations of no combat, no psychic powers and no strenuous activity, just no interruptions + willpower test.