On Friday, June 20, 2025, the Statistics Study Program of Yogyakarta State University held a Workshop on Statistical Machine Learning Methods for Genomic Prediction Using R Program on the fourth day which took place at 09.00-11.30 WIB in Meeting Room 3, FMIPA UNY. In this session, Professor Osval delivered material that focused on the kernel method. He explained starting from the definition and basic concepts of the kernel method, kernel functions and kernel matrices, various types of commonly used kernel functions, the application of kernels in glmnet and mixed models, to the hyperparameter tuning process in building kernel models. Professor Osval also discussed the Bayesian kernel method. In addition to delivering the material, he also provided case examples that were completed with the help of RStudio software to clarify students' understanding of the material that had been explained.