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Casey Pugh

@caseypugh / caseypugh.tumblr.com

I make stuff. Co-founded VHX. Created the Emmy-winning Star Wars Uncut in my spare time. INTJ. Also, meat sandwiches. Find me on Twitter or ping me on Yahoo! Chat.
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Neural Enhance

Proof of concept coding project from Alex J. Champandard can enhance details in images (like CSI or Blade Runner) using neural networks:

As seen on TV! What if you could increase the resolution of your photos using technology from CSI laboratories? Thanks to deep learning and #NeuralEnhance, it’s now possible to train a neural network to zoom in to your images at 2x or even 4x.  You’ll get even better results by increasing the number of neurons or training with a dataset similar to your low resolution image.
The catch? The neural network is hallucinating details based on its training from example images. It’s not reconstructing your photo exactly as it would have been if it was HD. That’s only possible in Holywood — but using deep learning as “Creative AI” works and its just as cool!
Source: github.com
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stml
The boulder from the region Neuenkirchen, Niedersachsen contains a thermoelectric generator which converts heat directly into electricity. Visitors are invited to make a fire next to the boulder to power up the wifi router in the stone which then reveals a large collection of PDF survival guides. The piratebox.cc inspired router which is NOT connected to the Internet offers the users to download the guides and upload any content they like to the stone database. As long as the fire produces enough heat the router will stay switched on. The title Keepalive refers to a technical network condition where two network endpoints send each other ‘empty’ keepalive messages to maintain the connection
“Keepalive” - Aram Bartholl - datenform.de
Source: datenform.de
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jkottke

How many digits of pi does NASA use?

Mathematicians have calculated pi out to more than 13 trillion decimal places, a calculation that took 208 days. NASA’s Marc Rayman explains that in order to send out probes and slingshot them accurately throughout the solar system, NASA needs to use only 15 decimal places, or 3.141592653589793. How precise are calculations with that number? This precise:

The most distant spacecraft from Earth is Voyager 1. It is about 12.5 billion miles away. Let’s say we have a circle with a radius of exactly that size (or 25 billion miles in diameter) and we want to calculate the circumference, which is pi times the radius times 2. Using pi rounded to the 15th decimal, as I gave above, that comes out to a little more than 78 billion miles. We don’t need to be concerned here with exactly what the value is (you can multiply it out if you like) but rather what the error in the value is by not using more digits of pi. In other words, by cutting pi off at the 15th decimal point, we would calculate a circumference for that circle that is very slightly off. It turns out that our calculated circumference of the 25 billion mile diameter circle would be wrong by 1.5 inches. Think about that. We have a circle more than 78 billion miles around, and our calculation of that distance would be off by perhaps less than the length of your little finger.

When was humanity’s calculation of pi accurate enough for NASA? In 1424, Persian astronomer and mathematician Jamshid al-Kashi calculated pi to 17 digits.

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