Meanwhile, for football fan Jones, there's continued frustration in being able to do some things with his phone, such as carry his ticket or pay for food, and not others.
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Future smoke alarms might use very different tech. Researchers have developed an AI-based system that uses machine learning to detect fire in video feeds. The tool can spot fire and smoke in footage from "any camera", says Prabodh Panindre at New York University – including CCTV, doorbell cameras and phone cameras.
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