On my way back from lunch, I walked through the Department of Computer Science at Duke and saw this wall of mailbox. Unlike metal or plastic doors at any resident housing I had seen before, these mailbox have transparent glass doors, so that you can easily tell whether there is anything in your mailbox without opening it. What a clever design! The lock at each glassdoor also gives users an option whether to lock it.
Lixiao Huang, a human factors scientist who is enthusiastic about human-robot interaction research.