TeachSchoolhk

1.  Alexa and Cortana: Works together Microsoft and Amazon on Wednesday announced the release of a public preview of the integration of their Cortana and Alexa voice assistants. Cortana will be available on Amazon Echo devices, while Alexa will be available to U.S. customers on Windows 10 devices and on Harman Kardon Invoke speakers. The collaboration is separate from the Alexa app on Windows 10 PCs, the spokesperson noted. "Our collaboration with Amazon is part of a longer-term vision for digital assistants to work together on behalf of our customers."   "Our ongoing goal has been to make Cortana your intelligent assistant, wherever you need assistance, and across many devices and platforms, from Windows 10 PCs to iPhone and Android," a Microsoft spokesperson said. Amazon has about 45,000 skills while Cortana has only about 250, but �It isn�t the skills since most Alexa users use only a tiny fraction of them�. Amazon needs this partnership because it�s losing groun

1. WIFI could be used to detect weapons and bombs. According to a study led by Rutgers University in New Jersey, Ordinary wifi could be used to detect bombs and weapons in public. Wireless signals can penetrate bags to measure the dimensions of metal objects or estimate the volume of liquids, researchers claim. Initial tests appeared to show that the system was at least 95% accurate.  It could provide a low-cost alternative to airport-style security, researchers said. The team behind the research tested 15 types of objects and six types of bags.  The wi-fi system had success rates of 99% for recognizing dangerous objects, 98% for metal and 95% for liquids.  When objects were wrapped inside bags, the accuracy rate dropped to about 90%.  The low-cost system requires a wi-fi device with two or three antennas and can be integrated into existing wi-fi networks. The system works by analyzing what happens when wireless signals penetrate and bounce off objects and materials. It could be util