The 2-scope technique for rotator cuff surgery: are 2 scopes better than 1?

The arthroscopic treatment of rotator cuff tear involves 2 distinct phases: intra-articular and subacromial. We present the 2-scope technique with the aim to simultaneously perform these phases, entrusting them to 2 experienced surgeons, and to obtain possible benefits compared with the classic 1-scope technique. Better nosology of the lesion and a more accurate evaluation of suture passer action (equidistance of the sutures and avoidance of degenerated articular-side tendon areas) represent benefits of this technique. In contrast, the 2-scope technique needs an additional lateral portal and could give rise to an erroneous distribution of costs and surgeons

The uniqueness problem for a model of an incompressible fluid mixture

Two uniqueness theorems for an isothermal mixture of two miscible fluids are proved. The mixture F is incompressible in a generalized sense and able of exerting Korteweg stresses

Nonlinear stability for reaction-diffusion Lotka-Volterra model with Beddington-DeAngelis functional response

The coexistence problem for Lotka-Volterra predator-prey model with Beddingyton-DeAngelis functional response and Robin type boundary conditions, is taken into account. By using the Rionero-Lyapunov functional, conditions guaranteeing the nonlinear L^2-stability and the biological meaningful equilibrium state are furnishe