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Archivo del Autor: Belen De Leon

Netflix has reportedly considered buying movie theaters – CNET

The streaming giant considered purchasing theaters in New York and Los Angeles, the LA Times reports.
Source: CNET

Airlines Check Their Engines for the Flaw That Hit Southwest

Investigators says Flight 1380’s engine showed signs of “metal fatigue,” and now airlines are hoping to find similar problems before they cause another disaster.
Source: Wired

The Security Risks of Login With Facebook

New research from Princeton University exposes vulnerabilities in the social network’s universal login API.
Source: Wired

Don’t just stir; Stircle

Although I do my best to minimize the trash produced by my lifestyle (blog posts notwithstanding), one I can’t really control, at least without carrying a spoon on my person at all times, is the necessity of using a disposable stick to stir my coffee. That could all change with the Stircle, a little platform that spins your drink around to mix it.

Now, of course this is ridiculous. And there are other things to worry about. But honestly, the scale of waste here is pretty amazing. Design house Amron Experimental says that 400 million stir sticks are used every day, and I have no reason to doubt that. My native Seattle probably accounts for a quarter of that.

So you need to get the sugar (or agave nectar) and cream (or almond milk) mixed in your iced americano. Instead of reaching for a stick and stirring vigorously for ten or fifteen seconds, you could instead place your cup in the Stircle (first noticed by New Atlas and a few other design blogs), which would presumably be built into the fixins table at your coffee shop.

Around and around and around she goes, where she stops, nobody… oh. There.

Once you put your cub on the Stircle, it starts spinning — first one way, then the other, and so on, agitating your drink and achieving the goal of an evenly mixed beverage without using a wood or plastic stirrer. It’s electric, but I can imagine one being powered by a lever or button that compresses a spring. That would make it even greener.

The video shows that it probably gets that sugar and other low-lying mixers up into the upper strata of the drink, so I think we’re set there. And it looks as though it will take a lot of different sizes, including reusable tumblers. It clearly needs a cup with a lid, since otherwise the circling liquid will fly out in every direction, which means you have to be taking your coffee to go. That leaves out pretty much every time I go out for coffee in my neighborhood, where it’s served (to stay) in a mug or tall glass.

But a solution doesn’t have to fix everything to be clever or useful. This would be great at an airport, for instance, where I imagine every order is to go. Maybe they’ll put in in a bar, too, for extra smooth stirring of martinis.

Actually, I know that people in labs use automatic magnetic stirrers to do their coffee. This would be a way to do that without appropriating lab property. Those things are pretty cool too, though.

You might remember Amron from one of their many previous clever designs; I happen to remember the Keybrid and Split Ring Key, both of which I used for a while. I’ll be honest, I don’t expect to see a Stircle in my neighborhood cafe any time soon, but I sure hope they show up in Starbucks stores around the world. We’re going to run out of those stirrer things sooner or later.


Source: TechCrunch

Senate confirms James Bridenstine as next NASA administrator – CNET

The confirmation fills the longest vacancy for the top spot in the agency’s history.
Source: CNET

Technique to beam HD video with 99 percent less power could sharpen the eyes of smart homes

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 of 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) pattern. To get color, each pixel needs to have its color channels sent in succession, but this too can be optimized.

Assembly and rendering of the video is accomplished on the receiving end, for example on a phone or monitor, where power is more plentiful.

In the end, a full-color HD signal at 60FPS can be sent with less than a watt of power, and a more modest but still very useful signal — say, 720p at 10FPS — can be sent for under 80 microwatts. That’s a huge reduction in power draw, mainly achieved by eliminating the entire analog to digital converter and on-chip compression. At those levels, you can essentially pull all the power you need straight out of the air.

They put together a demonstration device with off-the-shelf components, though without custom chips it won’t reach those

A frame sent during one of the tests. This transmission was going at about 10FPS.

microwatt power levels; still, the technique works as described. The prototype helped them determine what type of sensor and chip package would be necessary in a dedicated device.

Of course, it would be a bad idea to just blast video frames into the ether without any compression; luckily, the way the data is coded and transmitted can easily be modified to be meaningless to an observer. Essentially you’d just add an interfering signal known to both devices before transmission, and the receiver can subtract it.

Video is the first application the team thought of, but there’s no reason their technique for efficient, quick backscatter transmission couldn’t be used for non-video data.

The tech is already licensed to Jeeva Wireless, a startup founded by UW researchers (including Gollakota) a while back that’s already working on commercializing another low-power wireless device. You can read the details about the new system in their paper, presented last week at the Symposium on Networked Systems Design and Implementation.


Source: TechCrunch

Moto G6 vs. G6 Play, E5 Plus, E5 Play: What's the difference? – CNET

All four new budget handsets are coming to the US. Here’s how the heck do you tell them apart.
Source: CNET

Theranos employees take out anger at WSJ in homemade video game – CNET

Employees at the embattled blood-testing startup create a game styled after Space Invaders featuring the reporter who revealed the company’s problems.
Source: CNET

Original 1968 Ford Bullitt Mustang gets parked on National Mall in D.C. – Roadshow

The iconic green fastback will go on display under glass in D.C. to celebrate its induction into the National Historic Vehicle Register.
Source: CNET

Todo lo que debe saber sobre 'blockchain' y nunca se atrevió a preguntar

Para entender la importancia de las cadenas de bloques hay que ver su potencial más allá de sus usos actuales. Se trata de una tecnología con poder para desbaratar muchas de las instituciones de control que dominan nuestra economía centralizada y promover un mundo más justo y honesto
Source: MIT

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