Recent content by JollyJoker

It may have been added since you looked. There are three links, "Flash Presentation , MP3 , PDF".

The Monty Python sketch http://www.youtube.com/watch?v=npjOSLCR2hE"

Om du klickade på en länk på Medfarms mediabibliotek och fick upp den här sidan, skriv till doitwebmaster@medfarm.uu.se. Ange särskilt vilken länk du klickade på. The error message says to mail doitwebmaster@medfarm.uu.se and report which link is broken. Unless they removed it for a reason, I...

The minimal SU(5) GUT turned out to be wrong. http://en.wikipedia.org/wiki/Georgi%E2%80%93Glashow_model

Does anyone know a simple case where an extra dimension emerges? I'm thinking about something like how sound is basically just air pressure over time, with frequency giving you a third dimension that is convenient in some cases and adds odd properties like an uncertainty principle.

Not quite sure I understand the answer, but thanks for trying :)

This is the first time I see a description of the actual string vibrations that a layman can easily understand, thanks! Are these two the internal/external vibrations forbidden by the Coleman-Mandula theorem without SUSY?

As I understand it, yes. http://www.math.columbia.edu/~woit/wordpress/?p=3292&cpage=1#comment-69484"

I don't have the basics needed to do something like this, but it would be really nice if you could report on the progress here. I'm sure I'm not the only one who'd enjoy reading about it without being able to understand the details.

I think you're giving the observer some special "powers" here. It's not just your uncertainty on the particle's position, the uncertainty is real. The particle's location has a probability distribution and this is a property of reality, not an artifact of your limited ability to measure it.

Disclaimer: Anything below may be inexact, based on misunderstanding or simply incorrect. Cosmic censorship is still just a hypothesis. There are known solutions that lead to naked singularities and simulations seem to create them as well. It's possible the solutions are "too exact" in the...

Isn't the answer to this one "when the right vacuum is found"? Another question: Assuming the models predicting naked singularities are correct in the sense that either a singularity happens or quantum gravity effects prevent it from happening, without an event horizon obscuring the...

It wasn't "studies later found". The cosmic rays have been known for a long time. There was some interesting discussion on this between Marc Sher and Motl...

I'm not sure in which forum this should go, but I hope this is close enough. I recently realized that the lightest neutrino could be close in mass to the fourth root of the cosmological constant and found out I'm (unsurprisingly) not the first one to think of this after some googling. The...

Lubos lays out his arguments http://motls.blogspot.com/2010/07/why-there-is-no-gravigut-symmetry.html" . If I understand correctly, they're basically the same as Distler's.