Dr. Wahyu Purwo Raharjo, S.T., M.T. has completed his bachelor and master’s education at Institut Teknologi Bandung, Indonesia, and his doctoral program at Universitas Brawijaya, Malang, Indonesia. His doctoral thesis is entitled “Characterization of LDPE-matriced Composites Reinforced by Fibers from Zalacca (Zalacca Edulis) Midribs.” Currently, he serves as an associate professor in the Mechanical Engineering Department, Faculty of Engineering, Universitas Sebelas Maret, Surakarta, Indonesia. Besides his position as a lecturer, he is a member of the Non-metallic Materials Engineering and Processing Research Group in Universitas Sebelas Maret. He has some research interests in engineering materials, especially ceramics and composites. His current research is to study the effect of weather exposure on the physical, chemical, and mechanical properties of natural fiber-polymer composites being performed by accelerated and natural weathering.

• 1. Comparison Dissimilar Friction Welding Method Joints Bushing Between Low Carbon Steel ST 37 and Aluminum 6061 on Galvanized Pipes.- 2. Harnessing Residual Geothermal Brine as the Silicon Anode Precursor for Lithium-Ion Batteries.- 3. Thermal Properties and Particle Distribution of Used Tire Waste Particles as Potential Recycling Material A Review.- 4. Modeling the Effect of Stage Ratio on the Performance of the Savonius Multi Stage Wind Turbine Using Taguchi Analysis.- 5. Optimizing Hydro-Turbine Design Using 3-Dimensional Modeling on the Effect of Aspect-Ratio and Savonius Rotor PSA.- 6. The Effect of Graphite Synthesis temperature Impregnating Mangosteen Peel extract on The Quality of Graphene Oxide Functional Groups.- 7. One Day Ahead Dynamic DC Optimal Power Flow in Microgrid Incorporating Battery Energy Storage.- 8. Parametric Characterization of A Quarter Car Model of Vehicle Passive Suspension System in the Frequency Domain.