Mechanical engineer Maurizio Porfiri, of the Polytechnic Institute of New York University, designs robot fish. A few years ago, he found that real fish would mill about his aquatic robot, and now he's trying to understand why. His research suggests that it has less to do with how the robot looks, than how it makes fish feel.
Thanks to Twitter, Facebook, Skype, mobile phones, chat, instant messages and countless other tech advances, we're more connected than ever — theoretically, at least. But all too often, being totally wired leaves us oddly disconnected.
The prospect of losing may well discourage Iran from launching a direct cyberattack on the United States. But having a cyber arsenal for deterrent purposes would not necessarily preclude Iran from sharing those weapons with groups less hesitant to use them, security experts say.
A new study has determined that some automated essay graders can do as good of a job as humans. Melissa Block talks with New York Times education columnist Michael Winerip about the study and the weaknesses of automatic essay readers.
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