A COMPARISON OF GENETIC ALGORITHM AND SUBREGION APPROACH 1N THE OPTIMIZATION OF SLIDER AIR BEARING FOR SUB-7nm FLYING HEIGHT;A Comparison of the Genetic Algorithm and the Subregion Approach in the Optimization of Slider Air Bearings for Sub-7-nm Flying Height; A LOW TEMPERATURE TURBO-BRAYTON CRYOCOOLER FOR SPACE APPLICATIONS; A NEW HELIUM GAS BEARING TURBOEXPANDER;A new type of displacement sensor with pneumatic feedback system……