Volume 91, No. 3 1. Comparison and Analysis of Mppt Algorithms for Ky ConverterR. SHOBHA, DR.N. NARMADHAIDOI: https://doi.org/10.37896/pd91.3/9131 1 - 6 3. Tribological Investigations on HfC Reinforced AZ31 Magnesium Metal Matrix CompositesP. SATHISH KUMAR, P. GOPAL, T. SENTHILKUMARDOI: https://doi.org/10.37896/pd91.3/9133 20 - 41 4. Effect of Heat Treatment Temperature on Whitlockite Prepared Using DolomiteNANTHINI AMIRTHALINGAM, THENMUHIL