Comments for the physics arXiv blog

Comment on Why our time dimension is about to become space-like by Zephir

Zephir — Thu, 07 May 2009 08:54:40 +0000

We can visualize the spatialization of time by increasing dispersion of light inside of fog with distance. By AWT vacuum is inhomogeneous environment by definition, so that the light travels along the more curved path, perspendicular to spreading direction, the higher distance is. At the sufficient distance, the light travels completelly in perpendicular direction, because it spreads along event horizon of our universe. The perpendicular direction is the space-direction of the space-time gradient.

Comment on Visible light metamaterials on the cheap by Steve

Steve — Thu, 07 May 2009 02:16:11 +0000

So what really causes light to bend as it passes through glass?

Comment on Graphene transistors clocked at 26GHz by juel

juel — Wed, 06 May 2009 01:50:07 +0000

I agree with nicemandan progress takes a while. More than a while some years or even decades. I find graphene great and a step towards the future of making things faster and able to store more memory. Also great opportunities for electronics engineers to find a way to produce graphene for transistors. Whoever does it will make a buttload of money. We operate in Ghz now imagine achieving speeds of Thz, that’s ridiculous.

Comment on How Google’s PageRank predicts Nobel Prize winners by Página de LIRS » PageRank de Google puede predecir al ganador del premio Nobel?

Tue, 05 May 2009 17:36:22 +0000

[…] por la American Physical Society desde 1893 (resumen). Los resultados son interesantes porque casi todos los documentos en el top ten resultaron (o fueron ligados a) Premios Nobel. Lo cual significa que estudiando esta lista sería una buena forma de predecir a los futuros […]

Comment on Graphene quantum computers could be built with today’s technology by John Salamon

John Salamon — Tue, 05 May 2009 13:13:02 +0000

Very interesting theory, interested to know what type of real world performance one could expect from this technology. Adelaide Computer

Comment on Rubik’s cube proof cut to 25 moves by Aprenda a resolver um cubo mágico | RenatoTavares.com

Aprenda a resolver um cubo mágico | RenatoTavares.com — Mon, 04 May 2009 11:02:48 +0000

[…] Rokicki, um matemático da Universidade de Stanford, já mostra que é possível resolver qualquer cubo mágico em no máximo 25 passos. Agora ele surpreende demonstrando que é totalmente possível

Comment on The wound ballistics question by Paul

Paul — Sat, 02 May 2009 12:14:46 +0000

Dear Mr Courtney,
>been a student of weapons for sometime and wound ballistics is fascinating… just wish to make a query that u may be able to answer and satisfy my curiousity.
>lethality of a bullet is viewed as the capability to drop the target with a hit. this beside the case of hitting the brain or the CNS is dependent on many other factors which can be defined but not measured…. eg. the cavity of the primary wound and the resultant blood loss in an acceptable time frame which will prevent the person hit from effectively using his weapon. assuming that a rifle were to have and effective range of 300 metres, will it be correct to state that the letahlity of the bullet should be such that it can peirce a steel helmet at that range??? implicit is the fact that if a bullet were to hit the head of a person at that range it would have sufficient energy to enter it. and if it is to be used by military personnel who would be wearing helmet in war it should be able to penetrate it????
>shall wait for your reply. regards – Paul

Comment on Rubik’s cube proof cut to 25 moves by Ben

Ben — Thu, 30 Apr 2009 23:56:37 +0000

Can’t believe nobody has mentioned the Rubot. Check it out on YouTube.

Comment on Fermi’s paradox solved? by Erik

Erik — Thu, 30 Apr 2009 20:57:22 +0000

Matthew, it may well be likely that any intelligent extra terrestrial species will be the alpha predator of its planet, just like we are the alpha predator of ours.

Comment on If invisibility cloaks don’t work, try the invisibility sheet by Optical Invisibility Cloak A Reality | The Starnes

Optical Invisibility Cloak A Reality | The Starnes — Thu, 30 Apr 2009 05:41:47 +0000

[…] was based on a concept elucidated by John Pendry and a colleague at Imperial College in London.