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Saurabh Singh
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The narrative has changed. It has switched from, 'Isn't it terrible that AI is a failure?' to 'Isn't it terrible that AI is a success?'" - Peter Norvig

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Where are We in the Cosmic Web?
Redefining our place in space within supercluster Laniakea

The +Nature Publishing Group created an amazing video, highlighting the work of researchers from the University of Hawaii, showing that the Milky Way is part of a much larger cluster of galaxies, in what's termed a supercluster. They've named the supercluster Laniakea, which is Hawaiian for immeasurable heaven.  

It's a sort of ironic name, though, since this groundbreaking (spacebreaking?) work is the first time researchers have been able to measure space in a way that shows how the various superclusters divide up, effectively redrawing the boundaries of space and redefining our place in the Cosmic Web.

The video contains some really amazing images and animations, and provides an incredibly clear and concise explanation of the work, so do check it out (it's just a few minutes long, but they make the most of every minute). 

You can read more in Nature News: http://goo.gl/cvao2F , a Nature Editorial: http://goo.gl/pNlVkM , or check out the original article here (behind a paywall): http://goo.gl/Tyst1o

From the article's abstract:

Galaxies congregate in clusters and along filaments, and are missing from large regions referred to as voids. These structures are seen in maps derived from spectroscopic surveys1, 2 that reveal networks of structure that are interconnected with no clear boundaries. Extended regions with a high concentration of galaxies are called ‘superclusters’, although this term is not precise. There is, however, another way to analyse the structure. If the distance to each galaxy from Earth is directly measured, then the peculiar velocity can be derived from the subtraction of the mean cosmic expansion, the product of distance times the Hubble constant, from observed velocity. The peculiar velocity is the line-of-sight departure from the cosmic expansion and arises from gravitational perturbations; a map of peculiar velocities can be translated into a map of the distribution of matter3. Here we report a map of structure made using a catalogue of peculiar velocities. We find locations where peculiar velocity flows diverge, as water does at watershed divides, and we trace the surface of divergent points that surrounds us. Within the volume enclosed by this surface, the motions of galaxies are inward after removal of the mean cosmic expansion and long range flows. We define a supercluster to be the volume within such a surface, and so we are defining the extent of our home supercluster, which we call Laniakea. 

via +E.E. Giorgi on Twitter (@SciSunday)

#ScienceSunday   #scisunABS  

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Quite interesting proposal, though recall of high denominations, even Rs 100, seems quite impractical. Thoughts?

http://arthakranti.org/index.php

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For those of you curious regarding what I've been up, here's a short description and the Kickstarter link to our project!  

We've built a webapp for real-time training of visual object detectors, an API for building vision-aware apps, and an ecosystem for doing all of this inside the browser.  You won’t need to be a C++ guru or know anything about statistical machine learning algorithms to start using laboratory-grade computer vision tools for your own creative uses.

We've been working on this full-time since the Summer, but to deliver something truly awesome at a great price for everyday developers, we've gone to Kickstarter!  There are some really awesome rewards for early backers, so please share the link with friends and feel free to ask me anything related to the project!
--Tomasz

http://www.kickstarter.com/projects/visionai/vmx-project-computer-vision-for-everyone

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I don't think there is an Olympic athlete alive who could do this. 
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