Thermodynamics of static: Observers in Gibbs paradox
  In this work, Gibbs paradox was discussed from the view of observer. The limitations of real observer are analyzed quantitatively. The entropy of mixing was found to be determined by both the identification ability and the information already in hand of an observer. 
Liangsuo Shu, Xiaokang Liu, Suyi Huang, Shiping Jin
physics.class-ph