Designing places particular for children entails desire conditions for the physical, mental, emotionaland social development in different age ranges, and this design shouldn’t bring about any disturbance in the naturalgrowth and their entertainment. In the modern educational system, the physical atmosphere of the school must bean alive and dynamic factor in the quality of educational and traini...

In this short note we deal with the problem of trajectory tracking control of fully actuated Euler-Lagrange systems with unmeasurable velocities and bounded control inputs. In order to avoid the use of velocity measurements we introduce a nonlinear dynamic extension for the plant which renders the closed loop system semi-globally asymptotically stable, hence we prove that by increasing some of ...