In this paper, robust control strategies are explored to solve the problem of rendezvous maneuver for rigid spacecraft exposed to the external disturbance, actuator faults and unknown inertial parameters.To pursue the control objective, two adaptive controllers are constructed via the sliding mode control (SMC) technology.Firstly, a basic control s
Retropupillary fixated iris-claw lens: An effective alternative for aphakia
Context: Visual rehabilitation in aphakia has been a challenge with a wide variety of surgical options available for the ophthalmologist.We report the visual outcome with retropupillary fixated iris-claw lens secondary to intraoperative complications and secondary implantation in aphakia.Aims: This study aims to evaluate the postoperative visual ac
De La Chapelle Syndrome: Clinical and Physical Performance Implications
Gynecomastia in adolescence is a benign condition that mostly disappears spontaneously within approximately two years from onset.When it is associated with hypogonadism, it may suggest a disorder of sexual differentiation.We report the case of a young man (18 years old) with gynecomastia associated with azoospermia, Hall or Caged Light small testes