User talk:Wolfkeeper

Hi Wolfkeeper :) Lots of wolves to keep under control here ;) I hope you like the place and choose to stay.

Have fun :) Dysprosia 00:12, 3 Feb 2004 (UTC)

Vandalisation killing

For my proposal to greatly minimise vandalisation see: Wikipedia:TimedArticleChangeStabilisationMechanism WolfKeeper 23:07, 20 December 2005 (UTC)[reply]

Excellent work on SABRE

I think the article is really coming along now, it's much better than when I started it. Thanks! Maury 03:56, 9 Feb 2005 (UTC)

Nice Work

Hey, way to kick ass on that Leo Strauss article! TitaniumDreads 09:31, 25 December 2005 (UTC)[reply]

About your changes to the Semi-protection page

You reverted my edit on the Semi-protection page where I referenced Wikipedia:Timed article change stabilisation mechanism. Given you didn't add a comment, didn't talk to me on it, or do anything else; this seems to be a vandalisation. It seems you are violating NPOV at best. Would you care to explain?WolfKeeper 16:21, 24 December 2005 (UTC)[reply]

Be my guest, re-add it. -- user:zanimum

How To Copy

--- I have a problem / question which stems from the talk page on feature article 'Space Elevator'. I would like to make the following edit: state 1 state 2 state 3 ------- ------- ------- --archive 1 --archive 1 --archive 1 --archive 2 --archive 2 --archive 2 -talk 1 --archive 3 --archive 3 -talk 2 --archive 1 -talk 3 -talk 3 --archive 2 -talk 1 -talk 1 -talk 2 -talk 2 -talk 3 -talk 1 -talk 2 -talk 3

From State 2 to State 3 is just deletion but State 1 to State 2 is a COPY and i dont see any COPY in wikipedia....?? Thanx in advance if you have time for this...... uhhhhhh the above looks much worse than it looked on Sango123 talk page but maybe you can see what i want from 'space elevator' talk page. --Therealhrw 15:40, 31 December 2005 (UTC)[reply]

Phage therapy

--- Would you care to reconsider your edit? Don't you mean:- finding a suitable phage can be difficult (?). Once the right virus is found, the therapy works by delivering plenty of viruses of the right type. In other words the quantity is not the problem, its finding it. --Aspro 21:45, 3 January 2006 (UTC)[reply]

RB545

I noticed you've edited the article, removing the mention that RB545 was a LACE or Liquid Air Cycle Engine-like engine.

It's not easy to get any info on this engine, AFAIK it's still covered by the official secrets act, but it doesn't appear to have been a turbojet, more like a ramjet with a precooler by the looks of it.

Also, I think it actually liquified the air; there's some vague references to it in the Skylon literature; something like 'Unlike earlier engines SABRE avoids liquifying the air'.WolfKeeper 19:03, 7 January 2006 (UTC)

Retrieved from "http://en.wikipedia.org/wiki/User_talk:Burbank"

I can assure you that the RB545 was not a LACE engine. I have been deliberately vague, but my description is much nearer the truth!

--Burbank 18.02, 8 January 2006 (UTC)Burbank

Fair enough! I just wish I knew what I wasn't supposed to know, so I could make sure I didn't accidentally include it in the article :-) WolfKeeper 18:24, 8 January 2006 (UTC)[reply]

Before the RB545 contract was terminated, there were unconfirmed stories that the USSR had actually built and tested a similar concept. Presumably lack of funds after the break up of the Soviet Union prevented further progress? SABRE and RB545 are very similar in cycle.:-)Burbank 16.29, 9 January 2006 (UTC)

Wernher von Braun

"Apollo program director Sam Phillips was quoted as saying..."

Please add or indicate the source for this quotation to the article. Thanks for your contribution!
Best wishes, David Kernow 23:51, 16 January 2006 (UTC)[reply]

Diagrams and animations for special relativity

Hi Wolfkeeper,

I was reading some old talk on the special relativity Talk page. You wrote:

Also check out this awesome diagram:
http://origins.colorado.edu/~ajsh/sr/centre.html
It shows how two comoving objects can both be at the center of a lightcone at all times.
We need one of those... WolfKeeper 16:41, 2 November 2005 (UTC)[reply]

You are referring to Andrew Hamilton's special relativity exposition. I have made some animations that are inspired by that expositon, for the time being they are in this sandbox article on special relativity of mine. Please check it out, and tell me whether you think they are useful.

I can also attempt to do a good remake (and upload it) of this animation from Hamilton's site, which I think is very insightful. --Cleonis | Talk 11:30, 1 February 2006 (UTC)[reply]

Yes, I think the animation really explains things like how the speed of light is constant. That with some supporting text (but without the 180 degree rotation, I think that just complicates things.) That would really work well. If people can understand how the speed of light is constant in Relativity then the battle of explaining it to people is mostly won I believe. That animation has almost everything. If it had alternate colours at regular intervals along each time axis it would even include mutual time dilation.WolfKeeper 19:12, 1 February 2006 (UTC)[reply]

BTW I really like your time dilation spiral; that's really cute. That needs to go in the article. :-)WolfKeeper 19:12, 1 February 2006 (UTC)[reply]

I gather you suggest a remake of the Andrew Hamilton animation, with just the rocking from left to right, and not the swiveling. I will see what I can do.
When I had finished the helix-animation it dawned on me that contrary to usual practice the lightcone isn't at a 45 ° angle in that animation. Generally, Minkowski diagrams are clearer when space and time are in a 1:1 ratio.
About the constancy of the speed of light. I read a wikipedia article which in effect produced the following reasoning: in 1900 Poincaré assumed that light propagates through the luminiferous ether whith a fixed velocity with respect to the stationary ether. Poincaré showed that you get planes of simultaneity then, and that velocities transform according to transformations that are nowadays called the Poincaré group (and the Lorentz group is a subgroup of the Poincaré group.) Therefore, it was argued, since Poincaré recognized the transformations first, Poincaré had actually beaten Einstein to discovering relativity. That reasoning is wrong, but it is pretty hard to show what is wrong about it.
My point is: because in the animation we are talking about ( this one ) only propagation of light is shown, it is also compatible with pre-relativistic physics; in itself the things shown there do not enforce special relativity. That is why in my own animations I never use light to illustrate relativity, but moving clocks --Cleonis | Talk 19:59, 1 February 2006 (UTC)[reply]

Lightcones and relativity

One more remark about that animation that depicts a sequence of Lorentz transformations (Lor-animation).

Here is how I understand it, and presumably how you understand it.
Einstein's second postulate can be presented as follows: Light, emitted from a single source, will propagate into space in a spherically symmetrical way. The propagation will be spherically symmetrical with respect to every inertial frame of reference.

More than that, if comoving reference frames happen to be coincident when a pulse of light is produced, then they are both going to remain at the center of the sphere, even though they are comoving. That's what this diagram shows. If you think about it, that goes a very long way to showing how SRT supports the constancy of the speed of light.WolfKeeper 23:14, 1 February 2006 (UTC)[reply]

As I understand it, Einstein wants to correlate the concept of light propagation with Newton's third law. Newton's third law, which holds good for every inertial frame of reference, states that if two objects push away from each other, then there will be conservation of momentum; the common center of mass will remain moving along a straight line (which can of course be extended to any number of tiny objects).

I'm sorry, I don't understand this.WolfKeeper 23:14, 1 February 2006 (UTC)[reply]

Around 1905 the concept of asigning momentum to light was introduced (or was already established, I'm not sure). The principle of conservation of momentum will hold good if and only if light has the property that it propagates away spherically symmetrical with respect to every inertial frame of reference.

How does that work???WolfKeeper 23:14, 1 February 2006 (UTC)[reply]

That is how I understand the Lor-animation. --Cleonis | Talk 21:05, 1 February 2006 (UTC)[reply]

Thank you for joining me in introducing serious criticism to the Special relativity. Now user infinityO, a known vandal has been destroying it. RfC.80.138.193.56 00:39, 2 February 2006 (UTC)[reply]