SCWO-SNN: Snow carpet weaver optimization based spiking neural network for fraud detection in UPI transactions using federated learning. - Chandra Sekhar Kolli; Veeraraghavan Jagannathan; Dasaradha Ramayya Lanka; Ch Rajyalakshmi; Vijaya Kumar Reddy Radha; Vadisena Venkata Krishna Reddy (Comput. Stand. Interfaces, 2026)