A newborn's axillary temperature is 97.6° F (36.4° C). He has a cap on his head. His T-shirt is damp with spit-up milk. His blanket is laid over him, and several children are in the room running around his bassinet. The room is comfortably warm, and the bassinet is beside the mother's bed away from the window and doors. What are the most likely mechanisms of heat loss for this newborn?