Analysis of Optimizer Effects on CNN Model for Defect Identification in Welding Results of A 106 Grade B Carbon Steel Pipe. - Mochammad Karim Al Amin; Mohammad Thoriq Wahyudi; Muhammad Ainul Yaqin; Ryan Yudha Adhitya; Dika Anggara; Aygasta Firstya Alliyrahmanda; Moh Miftachul Munir; Eka Cahya Septian (ICEEI, 2023)