Rahat Tamzid, Ehfaz Faisal Mahee, Md. Anwar Hussen Wadud, Rahman, A., Miraz Ahmed, Md Ashikur Rahman, Abu Saleh Musa Miah, Fahim Al Farid and Sarina Mansor 2026. Enhancing Two-Wheeler Rider Safety with Helmet-Based Head Movement Monitoring and IoT Integration Using Safe Angle Formula. Statistics, Optimization & Information Computing. (Feb. 2026). DOI:https://doi.org/10.19139/soic-2310-5070-2668.