Per Karlberg

the quest for koll 

Don't worry, everything is just a hologram anyway...

New Scientist - Our world may be a giant hologram

"According to Craig Hogan, a physicist at the Fermilab particle physics lab in Batavia, Illinois, GEO600 has stumbled upon the fundamental limit of space-time - the point where space-time stops behaving like the smooth continuum Einstein described and instead dissolves into "grains", just as a newspaper photograph dissolves into dots as you zoom in. [...]

If this doesn't blow your socks off, then Hogan, who has just been appointed director of Fermilab's Center for Particle Astrophysics, has an even bigger shock in store: 'If the GEO600 result is what I suspect it is, then we are all living in a giant cosmic hologram.'

The idea that we live in a hologram probably sounds absurd, but it is a natural extension of our best understanding of black holes, and something with a pretty firm theoretical footing. It has also been surprisingly helpful for physicists wrestling with theories of how the universe works at its most fundamental level.

[...]Our everyday experience might itself be a holographic projection of physical processes that take place on a distant, 2D surface.

What's more, work by several string theorists, most notably Juan Maldacena at the Institute for Advanced Study in Princeton, has confirmed that the idea is on the right track. He showed that the physics inside a hypothetical universe with five dimensions and shaped like a Pringle is the same as the physics taking place on the four-dimensional boundary.

[...] At magnification, the fabric of space-time becomes grainy and is ultimately made of tiny units rather like pixels, but a hundred billion billion times smaller than a proton. [...]  Hogan realised that the holographic principle changes everything. If space-time is a grainy hologram, then you can think of the universe as a sphere whose outer surface is papered in Planck length-sized squares, each containing one bit of information. The holographic principle says that the amount of information papering the outside must match the number of bits contained inside the volume of the universe.

Since the volume of the spherical universe is much bigger than its outer surface, how could this be true? Hogan realised that in order to have the same number of bits inside the universe as on the boundary, the world inside must be made up of grains bigger than the Planck length. 'Or, to put it another way, a holographic universe is blurry,' says Hogan.
[...] 'Forget Quantum of Solace, we would have directly observed the quantum of time,' says Hogan. 'It's the smallest possible interval of time - the Planck length divided by the speed of light.'"

Frågor på det?

Edit:

This is why I like Reddit.

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Filed under  //   GEO6000   hologram   new scientist   physics   reality   science  

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Direct line


See more at Glennz-Tee-Store-Designs

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Found functions


See more wonderful math world at
nikkigraziano.com/foundfunctions.html

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Filed under  //   math   photos  

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Mini State of the union 2010

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Filed under  //   Barack Obama   photos  

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Sheryl Sandberg of Facebook at WEF, Davos

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Filed under  //   facebook   sheryl sandberg   social networks   world economic forum  

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YASOIC - yet another set of iPad comments

Since Steve Jobs finally revealed his tablet, four days ago, I've read tons of articles and blogpost, and I've given the gizmo a lot of thought. Some things I've realized are:

  • if I was a competing tablet supplier, I'd be scared by the iPad's software
  • if I was a competing tablet supplier, I'd be scared by the iPad's hardware
  • as a pure reading device, it was not as impressive, conceptwise, as e.g. Mag+ by Bonnier
  • Instapaper + Readability + Google Reader + delicious will be awesome on the iPad. An integrated alternative or a mashup, anyone?
  • the first was iPhone was cool, but not super impressive. Everybody knows how that evolved. This is iPad 1.0 after all...
  • an hour after the presentation, my impression was: meh... Now I know I will order one ASAP
  • multitasking is inevitable, it must be.
  • the missing support for Flash will likrly drive adoption of html 5


Among everything that has been written so far, Joe Hewitt's post (he is the man behind Facebook for iPhone, among other things) stands out as the most insightful by far:


"Anyone who feels underwhelmed by that doesn't understand how much of the iPhone OS's potential is still untapped."

***

"The bottom line is, many apps which were cute toys on iPhone can become full-featured power tools on the iPad, making you forget about their desktop/laptop predecessors [...], if you're a developer and you're not thinking about how your app could work better on the iPad and its descendants, you deserve to get left behind."

***

"The one thing that makes an iPhone/iPad app "closed" is that it lives in a sandbox, [...] In my mind, this is one of the best features of the OS. It makes native apps more like web apps, which are similarly sandboxed, and therefore much more secure. On Macs and PCs, you have to re-install the OS every couple years or so just to undo the damage done by apps, but iPhone OS is completely immune to this.[,,,] If you want to invent a new scripting language or background service or something, you're still totally free to do that, but you're going to have to run it on a web server. If you want total freedom on the client side, then write a web app."

I can't wait to see how this pans out...

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Filed under  //   iPad   openness   tablet   webapps  

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Spritt nytt bra jan 2010

Just nu kommer det för mycket bra musik. Spotify räcker inte till alls.

Jump jump dance dance
Good morning June
Wowlace
Caribou
Radio dept.
Hot chip cover av Grizzly bear
Blastoids

och

jj - n°3

Dessutom är det sjukt hur bra Miike Snows låtmaterial är, om inte Billie Holliday (spotify) höll måttet...

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Filed under  //   musik  

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Looking into the past - just walking my rabbit

Picture of 1911 Washington DC clashes with today.

See more at flickr - looking into the past.

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Internet statistics 2009

Pingdom has compiled a great list of internet usage numbers for 2009:
pingdom.com >> internet-2009-in-numbers.

Some greatest hits (total, global, as of December 2009):

  • 47 billion non-spam emails sent per day (35 per user!)
  • 237 million websites
  • 187 million domain names (across all top-domains)
  • 1.73 billion internet users
  • 1 billion YouTube videos served per day

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Musik - Januari 2010

Spotify playlist: P&C - bra 1001

Dessutom:

Länk till Phoenix - live & unplugged
En inspelning från Hamurg, 12:e Oktober 2009.
(via doobybrain.com)

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