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Smart buildings predict when critical systems are about to fail
By Chris Baraniuk Imagine a building that tells you – before it happens – that the heating is about to fail. Some companies are using machine learning to do just that. It’s called predictive maintenance. Software firm CGnal, based in Milan, Italy, recently analysed a year’s worth of data from the heating and ventilation units in an Italian hospital. Sensors are now commonly built into heating, ventilation and air conditioning units, and the team had records such as temperature, humidity and electricity use, relating to appliances in operating theatres and first aid rooms as well as corridors. They trained a machine learning algorithm on data from the first half of 2015, looking for differences in the readings of similar appliances. They then tested it on data from the second half of the year – could it predict faults before they happened? The system predicted 76 out of 124 real faults, including 41 out of 44 where an appliance’s temperature rose above tolerable levels, with a f...
India's Swadeshi GPS Develops A Problem, But Remains Functional
Highlights GPS based on seven satellites, last of which was launched in April Atomic clock on one satellite stops working, making it invisible Other satellites still transmitting crucial navigational information India's home-made navigational system, named NAVIC by Prime Minister Narendra Modi, has developed a technical problem. One of the seven satellites in the Indian version of the American Global Positioning System or GPS is malfunctioning, as a result of which it's not visible. The seven satellites together provide strategic services, the last of them was launched in April last year. Despite the flaw, the Indian Regional Navigation Satellite System is still functional. "The on-board atomic clock has developed a problem and we are trying to revive it," said Dr Kiran Kumar, Chairman of ISRO or the Indian Space Research Organization, to NDTV. Atomic clocks are used for precision time-keeping; India had imported these for the constellation of seven satellit...