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Heikki Arponen
Works at Freelancer
Attended University of Helsinki
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Heikki Arponen

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Schrödinger's cat videos: seen one, seen them all.

Not sure if that is funny...
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Heikki Arponen

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Hi! How does the ML community feel about Echo State Networks vs. traditional Recurrent Neural Networks?

The ESN supporters/inventors (Jaeger, Lukosevicius etc.) naturally defend ESNs and claim that they are often better than "standard" RNNs, but I'm skeptical...

I've done some modeling/forecasting with ESNs recently, and I have a feeling that the model could be improved quite a bit with some proper training...

Any opinions on the matter would be most welcome!

See e.g. here for a paper on ESNs:
http://organic.elis.ugent.be/sites/organic.elis.ugent.be/files/PracticalESN.pdf
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Eeg use case switchthrus on ecn/ rnn clinical n lab use conclusions differ in conditioned reward n punishment targets n ideal stimulus sets that said realtime use cases acceptability yrs away ¡¡¡
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This is really interesting news but that just has to be one of the stupidest images of a black hole I've ever seen!

I'm actually embarrassed to post this image here... I wish more people would go see Interstellar.
With its unprecedented resolution the EHT should be the first to see swirling gas on its final plunge over the event horizon into the Milky Way's supermassive black hole
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+Heikki Arponen​ it gets one salient features right, which is the accretion disk. But it's missing the relativistic jets and the lensing effects.

But I don't think that's a big deal. The picture gets across that we are taking about an astrophysical black hole, which is the important thing in the article you linked to.
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Haha this was actually better than the trailer :)
 
LOL one of the best uses of Interstellar i've seen in a while. :) 
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Worthy adversary for LectureNotes... for anyone who uses a tablet + active digitizer to write math (not capacitive stylus because those are crap).
This is a preview of the next major version of Write. It is updated more fr...
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Literally LOLed at this one :)
 
"Captchas are getting hard. Last one wanted to know why I wasn't helping a tortoise that I'd flipped on its back in the middle of the desert."
Source: https://twitter.com/DJBogtrotter/status/573603729578061824
#nerdhumor   #nerdhumour   #scifi   #sciencefiction  
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Hmm... do you get the urge to pull a gun and shoot the display when you're asked these questions +Bob Beattie ;)
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I think we need stuff like this...
 
Here is a video of social experiment where a Finnish guy blinds his eyes an stands arms open. Signs around him say "Muslim, I trust you. I am a white Finnish man. If you trust me. hug me." 

See yourself what happened. 

https://vimeo.com/120477690
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+Kevin Clift Very touching.
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Heikki Arponen

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Damn this is one impressive image! I actually had no idea it was possible to get a real image of a planetary system!
 
An image of a whole planetary system around the star HR8799 obtained!

Read more at:- http://www.mpia.de/news/science/2015-05-hr8799

      (Image credit: A. L. Maire / LBT)
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+Andreas Maier OK thanks for the link... yeah, I've seen some fuzzy images before, but nothing as clear as the above!
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Do you know what Finnish prisons are like?

I'll give you a hint: they're pretty different from, say, Russian or American prisons...
How did Finland moved having the highest incarceration rate in Europe to having one of its lowest? Part of the answer lies in its open prisons, where prisoners — even those convicted of crimes like rape and murder — can be gradually eased back into normal life.
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Interesting platform for anyone interested in time series analysis (well at least financial TS...). Read the blog text to find out more (no ads, I promise).
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FOR HIRE!

I'm now for hire for any kind of mathematical programming/quantitative or data analysis.

Please see my business site (and let me know what you think!).
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Thanks +Kevin Clift! Yes, it's a sort of a word play on "Quantum Mechanics" (my physics backgound) and indeed "Quant" (what I mostly do now) + a mechanic... not sure if it's a bit silly, but what the hell ;)

I did apply for a few jobs with the "devils" some time ago, but realized soon that even applying is a full time job (especially when the banks/funds were not doing too well)... so instead I learned a lot more about coding, finance math and data science and went at it myself. Wouln't mind doing a project for GS though ;)
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Education
  • University of Helsinki
    Math PhD, 2009
Story
Tagline
Math PhD Quant and Data Scientist
Introduction
I'm a Finnish mathematician/theoretical physicist with research experience and/or interests in quantitative finance, time series modeling, nonlinear phenomena and turbulence, differential geometry, gauge theories and gravity. I have PhD in math and Master's in theoretical physics, but I consider myself more theoretical physicist than a mathematician.

Currently I work as a freelance quant/data scientist (see my business homepage www.quantmechanics.com).


Work
Occupation
Mathematician and/or Theoretical Physicist
Skills
Math, Python, data science, quantitative analysis
Employment
  • Freelancer
    Solo artist, 2011 - present
  • University of Helsinki
    Postdoc, 2009 - 2011
  • University of Helsinki
    Grad student/researcher, 2002 - 2009
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Gender
Male
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In a relationship
Other names
Heka
Kannattaa olla varovainen näiden veijarien kanssa. Etenkin herra A.S. kusettaa enemmän kuin korillinen keppanaa... Ensimmäisellä kerralla piti mm. paikata ruostevaurioita, mutta myöhemmin kävi ilmi ettei mitään oltu tehty. Toisella kerralla oltiin hankkimassa ABS anturia Fixusista, ja se maksoi kuulemma 181€. Sanoin, että vien auton pois ja hankin varaosan itse muualta. "Ei sitä voi enää perua, se on jo tilattu!" Itse kuulin puhelun, jossa kaveri sanoi että varaosaa löytyy varastolta! "Ai niiiin joo just joo (seli seli)". Vein auton pois ja soitin itse Fixusille: varaosan hinta olikin 131€! Varskinkin jos hinnasta ei olla sovittu etukäteen tulee mukaan ihmeellisiä lisäkustannuksia...
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hieno maalaistunnelma + kotiruoka!
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aika kalliilta vaikutti mut ei sentään mikään veho...
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Tosi hyvät sapuskat ja reilun kokoiset annokset! Kun olisi vielä kotiinkuljetus...
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Comfortable, nice mood & good food.
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