A Novel Method for Detecting Dust Accumulation in Photovoltaic Systems: Evaluating Visible Sunlight Obstruction in Different Dust Levels and AI-based Bird Droppings Detection. - Md Shahriar Kabir; Khalid Mahmud Niloy; S. M. Imrat Rahman; Md Imon Hossen; Sumaiya Afrose; Md. Ismail Hossain Mofazzol; Md Lion Ahmmed (CoRR, 2025)