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euccastro

1,222 karma · joined March 10, 2007

euccastro@gmail.com
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euccastro··on Local Food or Less Meat? Data Tells The Real Story
If it is organic, all that energy input is carbon neutral.
euccastro··on The story of the Gömböc
Also, ships are not solid (as in 'filled'), let alone uniform in density. On top of that, hydrodynamics imposes more important constraints on shape. You can make a ship pretty stable by loading its keel heavily.
euccastro··on Andrew Ng: Machine Learning in Robotics
Thanks!

Also found related tutorials:

http://www.stanford.edu/class/cs294a/tutorial.html

http://ufldl.stanford.edu/wiki/index.php/UFLDL_Tutorial

euccastro··on Panoramic views of Moscow subway
Amazing #9, would have made Salvador Dali drool. Funny caption too: "ОМГ!".
euccastro··on How Little Sleep Can You Get Away With?
Don't listen to siblings. :) If you can afford to _free run_ (which google for) your sleep just do it.
euccastro··on Show HN: New platform for finding work - $2000 project minimum
If I was in either side of this business, I'd gladly lose those who won't bother to read the block of text.
euccastro··on Airbnb Taps Facebook, Lets You Crash With Friends Of Friends
This will make many people realise that they don't have nearly as many friends as Facebook would let them believe.
euccastro··on Portugal gets own Silicon Valley
This is something else actually. It's intended to be an utopian sustainable smart city. I don't think they call it the "Silicon Valley of Portugal" because of the projected startup ecosystem, but for the hi-tech aspect.
euccastro··on Portugal gets own Silicon Valley
http://living-planit.com/whyportugal.htm

Portugal offers a high level of education and location of universities in relation to the PlanIT Valley site (5 major universities within 90 km) with the largest in Portugal – University of Porto – less than 15 km away. In addition, there is a significant emphasis placed on knowledge development to support transition to a knowledge economy.

They are probably counting galician Universidade de Vigo as one of those major universities. Not portuguese, but closer than Lisbon, and there's actually quite some circulation of students and workforce both ways across the Minho river:

http://en.wikipedia.org/wiki/Norte_Region,_Portugal

North Portugal and Galicia form a Euroregion, based on the common historical, cultural, linguistic and economic similarities. The Euroregion has its origins in the Galicia-North Portugal Work Community, established in 1991. This Euroregion is also backed by the so-called Eixo Atlântico ("Atlantic Axis"), a lobby of Galician and North Portuguese cities and municipalities.

euccastro··on Osama bin Laden Is Dead
I see. I had checked it in Google define: and dictionary.reference.com, but not on that one. My apologies for the misunderstanding. I didn't intend to derail this into a discussion on language.
euccastro··on Osama bin Laden Is Dead
Sorry, I didn't know about the colloquial misuse of "compatriot" for "co-conspirator" or "buddy in crime" (??) etc.

I realized I was replying to a tangential remark, but it wasn't just language nitpicking. The implication that the US were in war against the people in the country that Bin Laden happened to be from, was serious enough not to let it go unchallenged.

euccastro··on Osama bin Laden Is Dead
Hold tight and keep your hopes up. Maybe one day you'll see it in first person and full 3D.
euccastro··on Osama bin Laden Is Dead
What do you have against his compatriots?
euccastro··on PyPy 1.5 Released: Catching Up
I don't think the meaning you give to "dynamic" here has much bearing on the difficulty of just-in-time compilation, except for reflection.

In Scheme you can define and create new functions and macros at runtime. There is not much else that is dynamic about the Scheme standard[1] because... there's not much else to the Scheme standard.

As for reflection, I see that mainly as a tools/debugging aid, and therefore very implementation-specific stuff. "Dynamic" languages have reflection in their definition because they are mostly defined by implementation.

That said, the Scheme standard doesn't preclude reflectivity at all, nor seems particularly compile-oriented to me. Nowhere it is assumed that implementations be compilers at all.

I think most of the things you find missing there were not left out for efficiency, but because it was rightly considered that they don't belong in the language spec at all.

[1] By the "Scheme standard" I mean R5RS.

euccastro··on PyPy 1.5 Released: Catching Up
Spanish does.

Not agreeing with grandparent, though. Lots of people admit to playing with their Wiis for hours a day.

euccastro··on PyPy 1.5 Released: Catching Up
Have you asked in the Stackless mailing list?
euccastro··on PyPy 1.5 Released: Catching Up
Kristján.
euccastro··on PyPy 1.5 Released: Catching Up
> But I wouldn't call Scheme a dynamic language!

Care to elaborate?

euccastro··on An Introduction to Xiangqi for Chess Players
You may be interested in Greg Costikyan's review:

http://playthisthing.com/rithmomachy-or-philosphers-game

euccastro··on Super Mario 64 was built with a system written in Lisp
FWIW, Gambit C compiles to C, not to Objective C. I'm not sure that makes a difference, though.
euccastro··on Bitcoin’s Collusion Problem
If someone started a new Bitcoin-like currency they should start from a blank slate. Cloning the network chains would be confusing and frivolous at best.
euccastro··on Bitcoin’s Collusion Problem
It would not be so much a network split as a network copy. Every user of the original network would have, to begin with, identical balances in both. Until inflation adjusted things, there would be an ephemeral increase in purchasing power.

If the new network implemented inflationary logic, as a modern state is wont to do, I can't exactly see people rushing to convert their old (relatively stable, perhaps deflationary) money to the new one. Therefore, I can't see many businesses stopping to accept the old bitcoin.

And after whatever adjustments are made, it will be business as usual. Bitcoin will remain the network for people that want a decentralized currency. Not necessarily of libertarians, but of anyone with distrust or disillusion with their governments and the banking system. Which I don't think is such a small demographic.

euccastro··on Bitcoin’s Collusion Problem
Yes, but in all fairness, that post addresses problems that can result from a computational attack. The one you raise doesn't need such at all. If a state wanted to compete with Bitcoin on all features but distributedness, a peaceful fork in an independent network would have essentially the same effect.
euccastro··on Bitcoin’s Collusion Problem
The # of bitcoins will grow up until an established number, ~21M. That's what's being advertised.
euccastro··on Bitcoin’s Collusion Problem
OK, here's plan B. You just start a new network and seed it with a copy of the old block chain (to bribe old users into at least trying it out). No need for elaborate and potentially expensive takeovers. Then you advertise the new network as the one sanctioned by Your Friendly Government.

What does the OP's elaborate, hostile, expensive plan buy you over plan B? That users will have to opt-out of your branch, rather than opt-in? Is that wise PR?

euccastro··on Bitcoin’s Collusion Problem
The coins are copied. You could spend them in both networks independently.
euccastro··on Bitcoin’s Collusion Problem
I'm not a libertarian, yet I like BitCoin better than fiat currencies and centrally manipulated monetary systems.

If other people are happy with whatever features of BitCoin remain under centralized control, more power to them. I see no problem.

But you're saying we have to fear that someone will start effectively issuing p2p dollars. I think it kind of defeats the purpose, but I can't see why that's a more of a threat to the principles of Bitcoin than plain old USD.

euccastro··on Bitcoin’s Collusion Problem
[Edit] I was repeating myself. See

http://news.ycombinator.com/item?id=2463284

euccastro··on Bitcoin’s Collusion Problem
It would be worse than starting over.

If they fork the block chains, my understanding is that your old bitcoins will work alright in either network. People that stick to the old network won't accept any money from the new one, but nothing keeps them from spending their money in the new one. Thus the adopters of the new economy would be subsidizing the members of the old one.

[Edit] And now my own semi-rebuttal: sure enough, the people who move to the new economy can similarly spend their old credit in the old one. But considering that the original Bitcoin currency is deflationary in nature, they have less incentive to do so, at least immediately.

euccastro··on Bitcoin’s Collusion Problem
A "centrally-controlled, government-sanctioned/mandated fork of the protocol" would steal few users from the BitCoin economy, because the kind of people that would move to the new system were probably using fiat currencies to begin with.

Men-with-guns haven't brought down p2p file sharing yet.

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