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Comic for November 21, 2018

Dilbert - November 22, 2018 - 12:59am
Categories: Geek

Holograms to Match of the Day: Huawei shindig shows 5G is still playing all things to all people

The Register - 1 hour 16 min ago
But whatever, you can expect phones next year

Roundup After years of interminable waffle, 5G is almost upon us, and Huawei wants to tell us what works – and what must wait. At this stage, the wrinkles are as valuable as the milestones, because 5G is a vast smorgasbord of different technologies and aspirations.…

Small drone soars on an ionic wind with no moving parts

Ars Technica - 1 hour 17 min ago

Enlarge (credit: Nature)

The Johnson Indoor Track at MIT probably won't go down in history in the same way as Kitty Hawk has, but it was the scene of a first in powered flight. A team of researchers has managed to build the first aircraft powered by an ionic wind, a propulsion system that requires no moving parts. While the flight took place using a small drone, the researchers' calculations suggest that the efficiency of the design would double simply by building a larger craft.

Ionic wind

In conventional aircraft, air is pushed around by moving parts, either propellers or the turbines within jet engines. But we've known for a while that it's also possible to use electrical fields to push air around.

The challenge is that air is largely made of uncharged molecules that don't respond to electric fields. But at sufficiently high voltages, it's possible to ionize the nitrogen and oxygen that make up our atmosphere, just as lightning does all the time. The electrons that are liberated speed away, collide with other molecules, and ionize some of them as well. If this takes place in an electric field, all those ions will start moving to the appropriate electrode. In the process, they'll collide with neutral molecules and push them along. The resulting bulk movement of atmospheric molecules is called an ionic wind.

Read 11 remaining paragraphs | Comments

Black Friday 2018 streamer deals: $20 Roku, $25 Fire TV and Chromecast and more - CNET

cNET.com - News - 1 hour 24 min ago
It's never been cheaper to get Netflix, Hulu, YouTube, ESPN, DirecTV Now and more to your TV. Here are the best discounts (so far) on our favorite streamers, many of which are available now.

California fires boost interest in PurpleAir's pollution sensors - CNET

cNET.com - News - 1 hour 24 min ago
The company's map displays air quality around the world.

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