Assessing the role of umbrella color for effective UV-AB radiation shielding at UP Manila CAS Tambayan - Ignacio, Arianne P.; Araniego, Carlos Gabriel Y.; Manan, Mohammad Noor O.; Mendiola, Jemeel B.; Santamaria, Bernard Tristan D.; Inocencio, Eric M.; Sayen, Karla May F. (Proceedings of the 43rd Samahang Pisika ng Pilipinas Physics Conference, 2025)