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itwbennett writes
"MIT Professor Dina Katabi and graduate student Fadel Adib have developed a system they call Wi-Vi that uses Wi-Fi signals to visualize moving forms behind walls. How it works: 'Wi-Vi transmits two Wi-Fi signals, one of which is the inverse of the other. When one signal hits a stationary object, the other cancels it out. But because of the way the signals are encoded, they don't cancel each other out for moving objects. That makes the reflections from a moving person visible despite the wall between that person and the Wi-Vi device. Wi-Vi can translate those faint reflections into a real-time display of the person's movements.'"
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lpress writes
"The Los Angeles Unified School District will spend $30 million over the next two years on iPads for 30,000 students. Coverage of the announcement has focused on Apple winning over other tablets, but that is not the key point. The top three proposals each included an app to deliver Pearson's K-12 Common Core System of Courses along with other third-party educational apps. The Common Core curriculum is not yet established, but many states are committed to it, starting next year. The new tablets and the new commitment to the Common Core curriculum will arrive around the same time, and busy faculty (and those hired to train them) will adopt the Pearson material. The tablets will be obsolete in a few years and the hardware platform may change, but lock-in to Pearson's default curriculum may last for generations."
