1. Study of Micro-hardness of High-Speed W9Mo4Co8 Steel Plates in Pendulum Grinding by Abrasive Wheel Peripheryrn2. Study of Hall Effect Sensor and Variety of Temperature Related Sensitivity rn3. Tectonics and Geological Factors Controlling Cleat Development in the Barito Basin, Indonesiarn4. Synthesis of TiO2 Nanofiber-Nanoparticle Composite Catalyst and Its Photocatalytic Decolorization Perfo…