ontains one solid (thigh), exhibits 3 dof for the hip
   Based on:
    V. Carbone et al., �TLEM 2.0 - A comprehensive musculoskeletal geometry dataset for subject-specific modeling of lower extremity,� J. Biomech., vol. 48, no. 5, pp. 734�741, 2015.
   INPUT
   - Human_model: osteo-articular model of an already existing
   model (see the Documentation for the structure)
   - k: homothety coefficient for the geometrical parameters (defined as
   the subject size in cm divided by 180)
   - Signe: side o