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rouli

651 karma · joined April 1, 2008

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rouli··on Particle Life
wonderful!

Coincidently, I read today a paper [1], which has a nice video demo here [2] describing a very similar system but with only one type of cells and a simple rule. Surprisingly enough, particles form cell type structure and seem to "reproduce".

[1] http://www.nature.com/articles/srep37969

[2] https://www.youtube.com/watch?v=makaJpLvbow

rouli··on Show HN: ThreadTone – Halftone images made of thread
really nice! in your fitness function - wouldn't you prefer to normalize somehow for the the line's length? i.e. - longer lines (going between two far away pins) will cover more dark pixels, and are more likely to be picked, even though they might also cover many bright pixels. I wonder if the average darkness of pixels along the line will work better?
rouli··on Show HN: App publishers ranked by estimated worth
another data point - http://insights.onavo.com/top-apps/
rouli··on Moore's Law and the Origin of Life
This is fun! I took the boys average weight data given in [1]

months from conception, average weight (kilos)

(9, 3.25)

(15, 7.5)

(21, 9.97)

(33, 12.88)

(45, 14.97)

(69, 18.97)

and saw that it really looks like a logarithmic function. So, fitted y to log(x), got y~7.4685*log(x)-13, with R^2=0.9965 (thank you R!). Extrapolated back, and found that at conception, the fetus weighs -inf kilos. Not surprising result, I must say. However, I was surprised to find that only after five months of gestation, the embryo reaches the critical mass of 0 kilos. Science!

[1] http://www.buzzle.com/articles/average-weight-for-children-b...

rouli··on Show HN: Fatnest, easy collaborative tweeting
cool idea!

could be useful for companies (like the one I work at) for employees to tweet via the company official account which is handled by marketing. (If you don't already), you may want a review panel for outgoing tweets, for which (I think) you can charge.

rouli··on Creating a friend recommendation algorithm from social network data
I don't believe Facebook set up this contest in order to find solutions to a problem they have. The biggest clue is that the graph given to contenders was a directed graph, unlike Facebook's social graph.

It seems very likely to me they used that problem in order to find good candidates for their data-group, which is exactly what this contest was all about. Either that, or they are trying to expand the social graph of Instagram :)

rouli··on Say 'Ahhh': A Simpler Way To Detect Parkinson's
It's a very interesting field. Can insurance companies detect the early stages of Parkinson's when you call their call-centers and change your rates accordingly? Here's a related dissertation on detecting mental health condition by using voice recordings http://www.eecs.berkeley.edu/Pubs/TechRpts/2012/EECS-2012-55... (haven't read it yet, but was meaning to for quite a while)
rouli··on Kaggle Post-Mortem: The dangers of overfitting
how did it go for you? I finished at the disappointing 12th place...
rouli··on Kaggle Post-Mortem: The dangers of overfitting
Not that novice, but your explanation was exquisite, thanks!
rouli··on Kaggle Post-Mortem: The dangers of overfitting
Being a machine learning (and Kaggle competitions) novice, can you explain what it means that your feature selection didn't properly implement cross-validation?
rouli··on Kinect is dead. Long live the Leap Motion
different use cases. Leap motion is for (extreme) short distance manipulation, which probably gives it the higher resolution, while Kinect is for mid-distance manipulation, which works well for games. I wonder though why would one opt for Leap motion and not buy a real touch screen if he needs to be that close to the screen anyway.
rouli··on Show HN: Visual browsing of Hacker News and Pinboard popular links
I see that you are using url2png's api, which means that even rendering a fraction of the monthly links will be costly. I'm creating a similar tool and opting (for now) to create the thumbnails offline and on my own (using webkit2png). Can you comment on your decision?
rouli··on Bomb Notifier
hmfff, works for me from Philadelphia ... Maybe it was the . in the end. Anyway, there's not much to see there :)
rouli··on Bomb Notifier
goes well with the (obviously satirical) site I made a couple of months ago - www.didwebombiranyet.com

How do you plan to send so many emails in real time?

rouli··on Machine Learning for Hackers Table of Contents
I'd say it's introductory, up to the chapter it discusses SVMs. Than it becomes incomprehensible, unless you have prior knowledge of SVMs and kernel methods.
rouli··on Google+ scores your relationships with your friends
I removed some parameters from the request out of privacy concerns. You can see those scores if you use a tool like firebug while loading the homepage.
rouli··on Google+ scores your relationships with your friends
I wholeheartedly agree with you on this. Maybe it's due to the fact that I'm not a native English speaker, but I never meant to insinuate otherwise (after all, Google+ is very very young and the score should come from somewhere). I just wanted to share the fact that Google+ makes this score available.
rouli··on Google+ scores your relationships with your friends
I removed some of the parameters of the request, for safety reasons ... but if you use firebug while loading plus homepage you'll find it.
rouli··on Inspired by XKCD's future timeline, I've created this app
implemented (as a little button above the graph, not to scare the casual users). Now you can more easily see how the "zombie apocalypse" is going to play out
rouli··on Inspired by XKCD's future timeline, I've created this app
I thought about it, but was too lazy :)... If this site still gets traffic tomorrow morning, I will try to do that.
rouli··on Inspired by XKCD's future timeline, I've created this app
thanks, made me understand my error with the "share link". Fixed now. Thanks again.
rouli··on Inspired by XKCD's future timeline, I've created this app
thanks. even if the warm feeling I'm feeling right now will last no more than a day, it was still worthwhile creating it.
rouli··on Inspired by XKCD's future timeline, I've created this app
most likely. It seems it can also happen in 2018
rouli··on Inspired by XKCD's future timeline, I've created this app
well, you can't expect much from a project done in a couple of hours :) here's the reason why it's falsely detects 2039: http://www.bing.com/search?q=2042+%22in+2039%22&go=&...
rouli··on Inspired by XKCD's future timeline, I've created this app
only 9 more years, and the wait is over!
rouli··on Microsoft files monopoly complaint against Google
April fools came early this year?
rouli··on Google AI Challenge 2011 (Ants)
Choosing Ants as the next challenge is a bit of a bet. I'm a bit afraid that the game is too random to get really interesting AIs. Fog of war + food spawning at random places can bring early advantage to those players that explored the map 'just right'.

Disclaimer: I really enjoyed playing the Tron and PlanetWars challenges. Although I was a bit disappointed with my final ranking in PlanetWars (~80), I think that game was close to perfect.

rouli··on A funny and unorthodox way to encourage strong passwords
yeah, I get that too, but here's what you are supposed to see: http://www.swiss-miss.com/2011/02/naked-password.html
rouli··on "This Article Is A Must Read" (Dumbest article in TC history)
unless it will be followed with an article that presents the distribution of the number of clicks per user on the link till understanding the joke/giving up.
rouli··on The most mysterious Google ranking ever...
another interesting thing to notice is that Google instant comes with the right result (cakecentral.com). Only when I press enter (or the search button) I get to the beerby.com result. Google instant does however claim that it's showing results for cake central magazine and I can search instead for "cake central".

EDIT: even better - searching for cakecentral.com also leads to the same error page on beerby.com

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