CAST: Channel-Aware Spatial Transfer Learning with Pseudo-Image Radar for Sign Language Recognition. - Md. Shakhoyat Rahman Shujon; Sheikh Md. Galib Mahim; Md. Milon Islam; Md. Rezwanul Haque; Md. Rabiul Islam 007; Hamdi Altaheri; Fakhri Karray (CoRR, 2026)