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621  Local / Discussions générales et utilisation du Bitcoin / Re: [Event] Bitcoin - Cryptocurrency réelle ou utopique ? - Belgique on: January 17, 2013, 01:39:26 PM
Bigre, justement j'ai prévu un déplacement en Belgique la semaine prochaine.  À Bruxelles par contre.  Liège n'est pas vraiment tout près je crois.  Dommage.

Ce sera filmé?
622  Economy / Speculation / Re: Your bets for 2014 on: January 17, 2013, 12:35:35 PM
January 17th, and we're almost at 15$ already.
623  Bitcoin / Bitcoin Discussion / Re: Kim Dotcom Mansion: Press conference 2013-01-17 GMT on: January 17, 2013, 08:44:16 AM
My guess is he will NOT accept bitcoin and I doubt he will even mention it during this conference.
624  Other / Off-topic / Re: The Holographic Principle on: January 17, 2013, 04:13:52 AM
It's indeed a very profound and revolutionary concept.  I would lie if I tell that I understand it in any substantial way, but the very little I know is very appealing.  In particular, I like the fact that it is related to the very interesting work of Erik Verlinde and his entropic interpretation of gravity.
625  Other / Off-topic / Re: [Virtual Reality] Oculus Rift on: January 17, 2013, 04:10:50 AM
>Zero Latency

These are going to cost a pretty penny.

I wrote zero-latency but I don't quote them on this.   They target at a very low latency, low enough that it seems smooth enough in a gaming context, anyway.  And people who tried it seemed totally convinced.

I'm not sure about the price but I read somewhere that the price should be about 300$.
626  Other / Off-topic / [Virtual Reality] Oculus Rift on: January 17, 2013, 01:54:28 AM


As far as I know, it's the first virtual reality headset design by gamers for gamers, with a full, zero-latency immersion target in mind.




And early tests by tech reviewers on CES 2013 are very enthusiastic:

http://www.youtube.com/watch?v=KJo12Hz_BVI
http://www.youtube.com/watch?v=3003UjOWt2c
http://www.youtube.com/watch?v=KBylGcvRuek
http://www.youtube.com/watch?v=xpV7qq1vyd4


A decisive milestone towards a Matrix-like gaming experience IMHO.
627  Other / Politics & Society / Re: Spotting a sociopath on: January 16, 2013, 11:14:57 AM

Not sure what is the exact difference between a sociopath and a psychopath, but here is a funny video about psychopaths:

Is Lance Armstrong a Psychopath?  You be the Judge
628  Other / Off-topic / Re: Let's Count to 21 Million with Images on: January 16, 2013, 07:27:46 AM
629  Other / Off-topic / Re: Why is it so hard to make a (big) diamond? on: January 15, 2013, 12:29:44 PM
 I'm saying that I'm surprised and kind of disappointed that not much efforts seems to be put into it, when compared to other stuff.

Why would anyone put effort into this, when you can just take a bunch of starving people and work them in mines until they're kaput, then discard of them?

Because natural diamonds are small.   I want to see a sky-crapper made of large single crystal diamond parts.
630  Other / Off-topic / Re: Why is it so hard to make a (big) diamond? on: January 15, 2013, 12:21:59 PM
From this you can see that creating diamonds needs a presure of about 70 to 700Gpa. Doesnt sound much does it ?

Let me put that into everyday units for you:

70Gpa is about 700,000 atmospheres, or about  10,152,641 psi. Wow!!
Oh yes, you also need a temperature of at least 4500K.  Kelvin, Celsius, who even cares at these temperatures?

For reference, (rough figures.)

  Melting point of Iron: 1800K.
  Melting point of Tungsten: 3700K
  Melting point of
      Tantalum Carbide, TaC, an
      ultra high melting point
      ceramic, reckoned to have
      highest melting point of anything: 4250K


Then don't heat the metal parts.  Only heat the graphite target at its center, somehow.  It would melt if it has to melt.

Quote
Even measuring such high temperatures is not simple, remember your common or garden platinum thermometer would melt!! (Oh, yes Platinum melts at about 2000K)
You don't really have to measure temperature if you really can't.  You can infer the temperature from the physical model and the amount of energy you put into the system.

Quote
Oh, and bear in mind that graphite starts to burn at about 1050K in anything similar to air.

Duh.  At this point doing everything in an inert gaz is a minor issue.

Quote
Of course many tricks can be used to confine something hot within something that is cooler, look at a microwave, the inside is not as hot as the food in it, but that in essence is why it is so hard to make diamonds at all.

Yes, microwaves or any concentrated radiation are a possibility.  I don't know, I was thinking about ultrasounds or something.  Anyway I'm pretty sure there are lots of ways to heat a localized point inside a big chunk of graphite.

I'm not saying in this thread that making diamonds should be easy, so please don't be a smart ass.  I'm saying that I'm surprised and kind of disappointed that not much efforts seems to be put into it, when compared to other stuff.   There are also things I don't know about the issues, so I asked in the hope that I could learn stuff.  In particular, I have no idea about how metals behave under very very large pressure.  Assuming they don't heat enough to melt, what can happen?  Do they shatter like glass or something?
631  Economy / Economics / Re: Why I think Bitcoin will not become an national currency on: January 15, 2013, 10:21:11 AM
1995 article by economist Marry Rot hard about the nature of money.  He talks about how gold can be used to eliminate the Fed. Easy to see how bitcoins could server the same purpose.

"Marry Rot hard"     Cheesy Roll Eyes
632  Local / Discussions générales et utilisation du Bitcoin / Re: presentation publique sur les bitcoins on: January 15, 2013, 09:56:04 AM
j'ai déja le petit film (de grondilu je crois) qui parle si bien des bitt-coings,

Tu parles de ça?

http://www.dailymotion.com/video/xglwxn_introduction-a-la-cryptodevse-bitcoin_tech

Je ne renie pas la chose, mais je ne crois pas que ce soit adapté à une présentation.  Pas assez graphique.

Une vidéo plus adaptée serait la désormais classique "What is bitcoin?", qu'on trouve sur http://www.weusecoins.com/
Je ne sais pas s'il existe une version doublée en français, par contre.

Sinon, j'espère que tu défendras la prononciation "supermarché du coin".

Aussi, puisque tu ne le précises pas je présume que c'est à Paris?
633  Other / Off-topic / Re: Wanna go to mars? prepair to fill your application form on: January 15, 2013, 06:13:46 AM

Only 13 votes.  Come on guys, the future of mankind is at stake!   Cheesy
634  Bitcoin / Press / Re: 2013-01-14 spectrum.iee.org - Ripple Credit System Could Help or Harm Bitcoin on: January 15, 2013, 05:00:06 AM

Because an exchange is always, to some extend, a lending system.  Two people exchanging stuff have to accept the idea that one of them will have to "pay" first and wait a bit until the other one pays his part.  It can never be simultaneous.  

Well.. except between cryptocurrencies perhaps?
It seems to me that 2 bitcoin-based cryptocurrencies could be exchanged atomically by each understanding enough about the other's blockchain to do some sort of multisignature scripted transaction which either succeeds completely or fails completely.

Indeed.  I think that's the kind of things you could do with smart-contracts.
635  Bitcoin / Press / Re: 2013-01-14 spectrum.iee.org - Ripple Credit System Could Help or Harm Bitcoin on: January 15, 2013, 04:37:57 AM
I am not knowledgeable about Ripple, but it is described as a lending system in this article.
Then why do they compare it to an exchange?

Because an exchange is always, to some extend, a lending system.  Two people exchanging stuff have to accept the idea that one of them will have to "pay" first and wait a bit until the other one pays his part.  It can never be simultaneous.   So there has to be some trust at some point.  In a centralized exchange, this is more or less solved since the central server acts as an intermediary, but it does not solve the fundamental problem, it just moves the risk to the third party.

Bitcoin-otc is a decentralized way of dealing with this, basically using a reputation system.

Ripple goes beyond that and generalizes the whole concept by allowing debts to be transferred.  It's more or less like the existing debt-based money but it is decentralized.

I think they are right when they say that Ripple is both a complement to bitcoin (since it can do what bicoin-otc does) and a competitor (since it proposes to replace a commodity based money with a debt-based money).
636  Economy / Economics / Re: Why a fixed aggregate makes sense on: January 15, 2013, 02:33:49 AM
Its really funny to me that you guys seem to be so conversant with the Austrian/bitcoin philosophy that you can no longer conceive of the other perspective.

A hyper-deflationary event can actually be just a bad as a hyper-inflationary event.

Nobody here talked about any "hyper" whatever.

The total amount of bitcoins is constant.   It's not like it's decreasing in any substantial way.  I don't see how this could lead to a hyper-deflation.

It doesn't even have to lead to deflation.  It really depends of the economic context.  During economic growth, the amount of goods and services augment compared to the monetary aggregate (which stay constant), so prices gets lower, and you have deflation.  During economic recession, the amount of goods and services decreases, and you have inflation.   To me it does not seem absurd to imagine that an equilibrium could be found.  And if it doesn't, well it would just be economic reality.  You don't have to try to control it with the monetary tool.   Same as you can't control weather with your barometer.
637  Economy / Economics / Re: Why a fixed aggregate makes sense on: January 14, 2013, 11:27:06 PM
That's preaching to the choir   Wink

Others will argue that you are changing your yardstick.  Bitcoin is like a measuring stick drawn around a balloon as the balloon is inflated (or deflated) the size of a bitcoin increases/decreases.

Joe and Jane sixpack don't care that they can buy 1/XXXX of everything.  They want 1 coin to buy 1 gallon of milk today, tomorrow, next year and 100 years from now.  To them that is a consistent measurement

...

However, people STILL want a currency with a reasonably steady cost-for-a-representative-basket-of-goods.

People should not want that.  Prices are supposed to vary according to economical reality, not according to our assumption or desire of stability.

Otherwise, I have a great idea to solve global warming issues.  Since we would like the global temperature to stay more or less stable, let's change the definition of the temperature to cancel out the effect of greenhouse gazes.


Also, I would be very surprised if Jane or Joe was unhappy about a decreasing price of a sixpack.
638  Other / Off-topic / Re: Reddit co-founder Aaron Swartz commits suicide on: January 14, 2013, 12:55:22 PM
The sad thing is I've seen articles where murderers and rapists get threatened with less jail time than that.

Amazingly enough, this might actually be true.
639  Other / Off-topic / Re: Let's Count to 21 Million with Images on: January 14, 2013, 01:46:49 AM
640  Other / Off-topic / Re: Let's Count to 21 Million with Images on: January 14, 2013, 01:44:00 AM

Don't forget the img tag:

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