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Jukka Laurila
Lives in Zürich, Switzerland
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Jukka Laurila

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A really well done visual explanation of complex numbers.
 
An experiment in math publishing, using MathBox, explaining the often misunderstood subject of Complex Numbers.
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This is so cool! See also the interactive lens simulator at: https://benedikt-bitterli.me/tantalum/tantalum.html
 
Slow Light
via u/thebreadnaught

Light travels fast, very fast! If only we could capture light moving slowly through our long lenses we could perhaps better appreciate how they work and even where and why our lenses cause aberrations. Benedikt Bitterli shows us how this can be accomplished, virtually!

In most of Computer Graphics, light speed is assumed to be infinite: Light sources illuminate their surroundings the instant they are turned on. Since light speed is a lot faster than the average camera shutter speed, this is a reasonable approximation. But what happens when we remove this assumption? If we created a virtual camera that was fast enough, we could capture light as it spreads through the virtual scene! To find out what this looks like, I modified my 2D light transport simulator to render transient effects.

The idea of capturing light in slow motion is not new - in fact, the Femto-Photography project succeded in doing this with physical cameras, which is an impressive feat. Jarabo et al. applied the Femto Photography idea to 3D rendering and rendered beautiful imagery of light moving through virtual 3D scenes. Building on my previous experiments with 2D light transport, it was my goal to apply this concept to 2D rendering.

More here: https://goo.gl/TP0gqE

Earlier post: https://goo.gl/7lBpPJ

Edit: I see that he has also added Lenses to his interactive Tantalum page https://goo.gl/ThfGTB mentioned in the earlier post.

Image: https://goo.gl/qYfj6E
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Google's source control system: probably the largest monolithic version control repository in the world.
https://www.youtube.com/watch?v=W71BTkUbdqE
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Recreating photos in the style of famous artists

In another example of how Deep Neural Networks (DNNs) can be used to create interesting works of art, a group of German researchers have released the paper, A Neural Algorithm of Artistic Style (http://goo.gl/HsFR0C), that introduces a system that renders an input photo in the artistic style of a given piece of art while preserving its overall content.

In their paper, the authors describe how the representations of content and style in their Convolutional Neural Network (CNN) are separable, making it possible to use neural representations to separate and recombine content and style of arbitrary input images. To learn more, read the full paper. For access to their algorithm, visit http://goo.gl/jB7ovU
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This is brilliant in so many ways. I laughed so much it hurt :)
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New Horizons is now close enough to Pluto to get better photos than Hubble did. Closest approach coming up in 12 days. Exciting!
 
Pluto Rising

New Horizons is closing in on Pluto, and that means we’re finally getting some detailed images of the small world. With the appearance of new surface features comes a new batch of questions.

The latest comes from a new color images of Pluto and Charon. The images were created by combining high resolution images from the Long-Range Reconnaissance Imager (LoRRI) with color data from RALPH. What’s clear is that there is a chain of features along the equator of Pluto. Whether these are features similar to the equatorial region of Iapetus or some type of cryovolcanic activity is still not clear. It’s also clear from the image that Pluto and Charon are quite different in both color and brightness. Given that the two bodies are thought to have formed from a collision with another body, it will be interesting to see how they can be so different.

We’re still in the speculation stage, since the data is so new, but the exciting thing about these images is that Pluto is no longer a spot a few pixels wide. It’s a world with clear features and with mysteries to be revealed. We’re finally exploring everyone’s favorite little world, and that’s a huge scientific achievement.

New Horizons will make its closest approach on July 14, so we can expect a flurry of images leading up to that time. Of  course it will take months for the all the data to be transmitted back to Earth, so long after the flyby we’ll Pluto is going to be rising in the news.
New Horizons is closing in on Pluto, and that means we're finally getting some detailed images of the small world.
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Now you can generate your own dreamy neural net image

#deepdream  

For those of you who liked the post I shared a couple of weeks ago about the images generated by neural nets (old post: https://plus.google.com/+JeffDean/posts/jVBUgDxhbRd), I'm happy to announce that Alexander Mordvintsev, +Christopher Olah , and Mike Tyka have put together an open-source iPython notebook containing the code that generates these images, and you can play around with it on your own images.  (Note: this notebook depends on a few other packages, so you have to have enough persistence to install numpy and caffe to get this to work).  The iPython notebook is at https://github.com/google/deepdream, but see the blog post linked to by this post for details.

The blog post asks that people tag images they generate and share with #deepdream , so I suspect you can keep looking at that tag to see all kinds of weird and wonderful images.

Have fun, everyone!
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Jukka Laurila

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sigh This future is broken, can I exchange it?
 
Not pretty. However the bigger problem is not the obvious one. There will be patches very soon for all the usual Linux platforms (or roll your own RPM it's not hard). However guess what many of those cheap GPL violating no source code ADSL routers that never get firmware upgrades run for their own internal use and to masquerade DNS.

Oh dear..

And that is why source code to your infrastructure is so important. This bug just obsoleted a pile of low end crapware router and firewall boxes holding homes, businesses and government together.

You can upgrade all your servers but if that little cheapo plastic box on your network somewhere has a vulnerable post 2008 glibc and ever does DNS lookups chances are it's the equivalent of a trapdoor into your network.

Even more fun of course - some of them regularly do poll some hardcoded DNS address so if anyone takes over that DNS record and starts serving a suitably compromised record back ...

https://googleonlinesecurity.blogspot.co.uk/2016/02/cve-2015-7547-glibc-getaddrinfo-stack.html
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How modern computer chips are made. Fascinating stuff!
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The car industry is slowly waking up to the fact that if you take a computer and connect it to the internet, you will be subject to the same forces as anyone else connecting computers to the internet. Those computers will be targeted and you had better invest serious effort into securing them.

Why on earth are the internet-connected components of the car not air-gapped from the components responsible for driving safety completely baffles me.
 
"As the two hackers remotely toyed with the air-conditioning, radio, and windshield wipers, I mentally congratulated myself on my courage under pressure. That’s when they cut the transmission.

Immediately my accelerator stopped working. As I frantically pressed the pedal and watched the RPMs climb, the Jeep lost half its speed, then slowed to a crawl. This occurred just as I reached a long overpass, with no shoulder to offer an escape. The experiment had ceased to be fun."

"[T]he attack on the entertainment system seems to work on any Chrysler vehicle with Uconnect from late 2013, all of 2014, and early 2015"

A zero-day vulnerability that allows an attacker anywhere with an Internet connection control pretty much everything in the car, including braking and gas pedal and to some extend steering.

And what Chrysler, the manufacturer, is doing is trying to silence the hackers, not halt the fleet until the fix is deployed.
I was driving 70 mph on the edge of downtown St. Louis when the exploit began to take hold.
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Have him in circles
251 people
Otto Vehviläinen's profile photo
Peter Frost's profile photo
Heikki Orsila's profile photo
Heikki Verta's profile photo
Eric McCallum's profile photo
Hugo van der Merwe's profile photo
Antero Kuusi's profile photo
Niranjana Devkota's profile photo
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Haapajärvi, Finland - Janakkala, Finland - Helsinki, Finland
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The beef carpaccio was possibly the best I've ever had, and I've had a few. Absolutely delightful!
Public - 5 months ago
reviewed 5 months ago
The omelette was delicious!
Public - 5 months ago
reviewed 5 months ago
What a delight! I liked a lot the real 747-100 cockpit where you can try sitting in the pilot's seat and have a knowledgeable volunteer explain what all the knobs do and what all the dials mean. I've visited quite a few museums related to aviation, but still there was a lot that was new to me such as the unmanned airship-airplane hybrid Avitor which is quite possibly the most steampunk thing I have ever seen. Recommended for anyone interested in airplanes, helicopters, gliders or jetpacks.
• • •
Public - a year ago
reviewed a year ago
Tasty, fast, convenient, expensive.
Food: Very GoodDecor: Very GoodService: Very Good
Public - 3 years ago
reviewed 3 years ago
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The donuts are tasty, but be sure to check what they are charging you. I got charged 1.60 for each while the price tag on the shelf (with a photo of exactly that kind of donut) said they cost 1.30. I complained but they just said the price was wrong. I didn't bother pressing the point since it was such a trivial amount of money, but it still left me feeling slightly scammed.
Public - 7 months ago
reviewed 7 months ago
Delicious sushi and interesting fusion rolls!
Public - a year ago
reviewed a year ago
Unpretentious and reasonably priced but the food is still great. I had the Roghan Josh with garlic naan and I can heartily recommend it.
Food: ExcellentDecor: Very GoodService: Very Good
Public - 3 years ago
reviewed 3 years ago