Medical Technology Flexible and Compliant Instrument Hybrid-Structure Hand-Held Robotic Endoscope for Sinus Surgery with Enhanced Distal Dexterity A Systematic Modelling Approach for Motor-Cable-Joint Kinematics of Coupled Tendon-Driven Surgical Instruments Closed-llod Configuration Space Control and Friction Modeling of Tendon Driven Continuum Manipulator for Endoscopic Submucosal Dissection Novel Compliant Robotic Instrument for Organ Retraction and Space Opening