RETRACTED: Optimization of geometrical parameters of the heat receiver of a solar air heating collectorMirsoli Uzbekov, Akmal Kuchkarov, Bekzod Boynazarov, Muxammadrafiq Toxirov and Shermuhammad MuminovBIO Web Conf., 84 (2024) 05036DOI: https://doi.org/10.1051/bioconf/20248405036