Birds and bats are known to employ two different gaits in flapping flight, a vortex-ring gait in slow flight and a continuous-vortex gait in fast flight. We studied the use of these gaits over a wide range of speeds (1-17 ms(-1)) and transitions between gaits in cockatiels (Nymphicus hollandicus) and ringed turtle-doves (Streptopelia risoria) trained to fly in a recently built, variable-speed w...

This paper contributes with a new two-stage optimization methodology to solve the problem of optimal placement and sizing solar photovoltaic (PV) generation units in medium-voltage distribution networks. The is formulated mixed-integer nonlinear programming (MINLP) model, where it combines binary variables regarding nodes PV generators will be located continuous associated power flow solution. ...