Around ten years ago when we introduced a policy called “First Click Free,” it was hard to imagine that the always-on, multi-screen, multiple device world we now live in would change content consumption so much and so fast. The spirit of the First Click Free effort was – and still is – to help users get access to high quality news with a minimum of effort, while also ensuring that publishers with a paid subscription model get discovered in Google Search and via Google News. In 2009, we updated the FCF policy to allow a limit of five articles per day, in order to protect publishers who felt some users were abusing the spirit of this policy. Recently we have heard from publishers about the need to revisit these policies to reflect the mobile, multiple device world. Today we are announcing a change to the FCF limit to allow a limit of three articles a day . This change will be valid on both Google Search and Google News. Google wants to play its part in connecting users to quality news and in connecting publishers to users. We believe the FCF is important in helping achieve that goal, and we will periodically review and update these policies as needed so they continue to benefit users and publishers alike. We are listening and always welcome feedback. Questions and answers about First Click Free Q: Do the rest of the old guidelines still apply? A: Yes, please check the guidelines for Google News as well as the guidelines for Web Search and the associated blog post for more information. Q: Can I apply First Click Free to only a section of my site / only for Google News (or only for Web Search)? A: Sure! Just make sure that both Googlebot and users from the appropriate search results can view the content as required
Everyone seems to be insisting on installing cameras all over their homes these days, which seems incongruous with the ongoing privacy crisis — but that’s a post for another time. Today, we’re talking about enabling those cameras to send high-definition video signals wirelessly without killing their little batteries. A new technique makes beaming video out more than 99 percent more efficient, possibly making batteries unnecessary altogether. Cameras found in smart homes or wearables need to transmit HD video, but it takes a lot of power to process that video and then transmit the encoded data over wi-fi. Small devices leave little room for batteries, and they’ll have to be recharged frequently if they’re constantly streaming. Who’s got time for that? The idea behind this new system, created by a University of Washington team led by prolific researcher Shyam Gollakota, isn’t fundamentally different from some others that are out there right now. Devices with low data rates, like a digital thermometer or motion sensor, can something called backscatter to send a low-power signal consisting of a couple bytes. Backscatter is a way of sending a signal that requires very little power, because what’s actually transmitting the power is not the device that’s transmitting the data . A signal is sent out from one source, say a router or phone, and another antenna essentially reflects that signal, but modifies it. By having it blink on and off you could indicate 1s and 0s, for instance. UW’s system attaches the camera’s output directly to the output of the antenna, so the brightness of a pixel directly correlates to the length of the signal reflected. A short pulse means a dark pixel, a longer one is lighter, and the longest length indicates white. Some clever manipulation of the video data by the team reduced the number of pulses necessary to send a full video frame, from sharing some data between pixels to using a “zigzag” scan (left to right, then right to left) scan pattern. To get color, each pixel needs to have its color channels sent in succession, but this too can be optimized.