1) Forums : Technical Support : Team Problem (Message 10251)
Posted 21 Feb 2012 by Profile Rudy Toody
Post:
Same here.
2) Forums : Cosmology and Astronomy : Does the universe cast a shadow? (Message 9359)
Posted 17 Mar 2011 by Profile Rudy Toody
Post:
Another discussion can be found here.
3) Forums : Cosmology and Astronomy : Does the universe cast a shadow? (Message 9358)
Posted 15 Mar 2011 by Profile Rudy Toody
Post:
Imagine a two-dimensional room whose walls form a simple closed figure, and that these walls are completely covered with mirrors. If the room were a convex body every point in it would be illuminable by a single lamp or candle placed anywhere in the room, with or without the mirrors. But suppose it is not convex. Is there a shape for the curved walls such that from some point in the room a light source would fail to illuminate the whole room even with the aid of mirrors? The answer is yes; and more surprisingly perhaps, we can exhibit a room (Figure) not fully illuminable from any point in it. The area marked green is bounded by a semi-ellipse and its major axis through foci p,p'. The blue region is another such semi-ellipse area, foci at q,q'. The other curves are tangent to the major axes at the foci.

Now it is a property of the ellipse that any light ray crossing the major axis between the foci is reflected along another path that crosses between the foci; likewise a ray crossing the major axis beyond one focus is reflected beyond the other focus. This is because a ray eminating from a focus is reflected to the other focus, the reason for the name. Now if R stands for red points and O for orange points, we see that any light ray starting from a red point can never reach a yellow, blue, or orange point, and one from an orange point can never reach a yellow, green, or red point. A ray starting from a green point misses all the orange points, from a blue point misses all the red points, and from a yellow point misses the orange and red points. Thus the whole region, bounded by smooth curves, is not illuminable from any of its points.

The Figure and text is from "Tomorrow's Math" by C. Stanley Ogilvy 2nd Edition 1972 pp.59-61 Oxford University Press.

I found the image that gave me the idea for the question, so I have revived this thread.

My question is: Could a three-dimensional shape with these characteristics exist in space and perhaps account for dark matter and dark energy? In other words, does the universe cast a shadow?
4) Forums : Cosmology and Astronomy : Could the speed of light have a different value in different universes? (Message 9337)
Posted 15 Feb 2011 by Profile Rudy Toody
Post:
So, you are saying that for the time it took for the Big Bang to create meters and seconds, there was no time? Maybe, it was expressed as a ratio of some kind. It wouldn't need any units of measure at that point.

A simplistic argument:

1) the speed of light is its speed through a vacuum.
2) maybe, the environment within the Big Bang allowed it to go faster, i.e., it was more conducive to speed than a vacuum would be.

A thought experiment:

Use the pronic numbers as the ratio of time to space for a Minkowski diagram. Lower pronic number for time, higher for space.
At each step, use the next pronic number, draw the rectangle, and draw a line from 0,0 to the opposite corner of the rectangle. The numbers would be 1,2 2,3 3,4 etc. When they get to 1 000 000 000, 1 000 000 001 it's as good as a square. So, perhaps the rapid inflation used something like this. By the time the inflation got to a point where light was usable, the ratio was quite close to 1:1.
5) Forums : Cosmology and Astronomy : Could the speed of light have a different value in different universes? (Message 9335)
Posted 15 Feb 2011 by Profile Rudy Toody
Post:
Four years ago I had a glimmer of an idea: That the Big Bang could be explained by a Bootstrap sequence, to borrow a term from computer science.

A bootstrap is a finite sequence that establishes the state of a system.

I thought I would start small, so I looked at numbers. I am starting a paper this week that explains the finite sequence found in the Sieve of Eratosthenes that prepares the sieve for sustained identification and extraction of various prime patterns (twins and quadruplets.)

I think a similar approach can be used to explain the Big Bang. Obviously, it would be vastly more complex than the number system. But it would still be finite!
6) Forums : Cosmology and Astronomy : Could the speed of light have a different value in different universes? (Message 7752)
Posted 26 Dec 2008 by Profile Rudy Toody
Post:
In the Big Bang theory, there is an early stage where things seem to exceed our known speed of light.


What do you mean by that?


Below is an excerpt from Wikipedia (bold passage):

The idea from Moffat and the team Albrecht-Magueijo is that light propagated as much as 60 orders of magnitude faster in the early universe, thus distant regions of the expanding universe have had time to interact since the beginning of the universe. There is no known way to solve the horizon problem with variation of the fine-structure constant, because its variation does not change the causal structure of spacetime. To do so would require modifying gravity by varying Newton\'s constant or redefining special relativity (See equivalence principle for further details). Classically, varying speed of light cosmologies propose to circumvent this by varying the dimensionful quantity c by breaking the Lorentz invariance of Einstein\'s theories of general and special relativity in a particular way.

Full article is here: The varying speed of light cosmology
7) Forums : Cosmology and Astronomy : Could the speed of light have a different value in different universes? (Message 7749)
Posted 26 Dec 2008 by Profile Rudy Toody
Post:
In the Big Bang theory, there is an early stage where things seem to exceed our known speed of light.

Could this early stage be responsible for establishing the speed of light for the universe? Depending on the starting conditions in each Big Bang that creates a universe, a limit (speed of light) is set for that universe.

If we could show that this is the case, the Big Bang theory would be wrapped up.
8) Forums : Cosmology and Astronomy : Literature recommendations? (Message 3335)
Posted 21 Oct 2007 by Profile Rudy Toody
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I recommend "Many Worlds in One" by Alex Vilenkin.
9) Forums : Cosmology and Astronomy : Does the universe cast a shadow? (Message 3334)
Posted 21 Oct 2007 by Profile Rudy Toody
Post:
I have been trying to think (out-side the box) for an explanation for dark energy, and I had this golden moment. Aha! What if the universe cast a shadow and those regions in shadow have a different entropy than the region outside the shadow and the reason it can't be seen is because it's in the shade?

--Fred Kline
10) Forums : Announcements : New Website Design, Part Deux (Message 2825)
Posted 18 Sep 2007 by Profile Rudy Toody
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Link to the new BOINC logo.
11) Forums : Technical Support : No Work From Project- All Platforms (Message 2327)
Posted 25 Aug 2007 by Profile Rudy Toody
Post:
My 3 FX-60s running WinXP Pro x64 are completely empty. My pending is still quite high.
12) Forums : Technical Support : 0.00% ? (Message 2264)
Posted 23 Aug 2007 by Profile Rudy Toody
Post:
Hi
Just a quick question, is it normal for the camb 1.25 app to show 0.00% after 2 hrs cpu time.

Thanks

Currently, this is the norm. When they get the interface to the BOINC Manager tested, this will be fixed.

EDIT: You both were faster than I.
13) Forums : Technical Support : Pending Because Work Unit Remains "Unsent" (Message 1958)
Posted 12 Aug 2007 by Profile Rudy Toody
Post:
Here are some examples from my hosts. It looks like replacements were created but unsent.

709296...337407...36.80 expired 9 August Host 2
731464...348149...50.12 expired 9 August Host 2
734361...349517...36.60 expired 9 August Host 2
735454...350063...36.09 expired 9 August Host 2
736039...350355...36.55 expired 9 August Host 1
737183...350927...50.90 expired 10 August Host 3
746319...355207...50.59 expired 9 August Host 3
14) Forums : Technical Support : No Work From Project- All Platforms (Message 1913)
Posted 10 Aug 2007 by Profile Rudy Toody
Post:
I am getting the message on occasion, but I'm also getting the work.

I have 3 AMD FX-60s running WinXP64.
15) Forums : Technical Support : Top Teams display glitch (Message 1905)
Posted 10 Aug 2007 by Profile Rudy Toody
Post:
There is a one-off problem with the display of the "Top Teams" page.

Everything is fine upon entry.

However, if you sort by "Total Credit," the #20 team is also #21 and one team is skipped.

SETI.Germany is the duplicate. Team Norway should be #21.

I don't see it... what's your OS and browser?


Scott-This is not a problem as stats update 1 page at a time of 20 users/teams/hosts

If say #20 drops to #21 before the 21-40 updates it might show that it is temporarily missing or doubled depending if its up or down. Would be too much load on the server trying to update the whole ranking database in large chunks or at 1 time so this just becomes normal. Regards Jeff

This is what BOINC indicated is the case. They said if anybody (me) has a better idea, to let them know. So, this thread can be closed.

--Fred
16) Forums : Technical Support : Top Teams display glitch (Message 1869)
Posted 9 Aug 2007 by Profile Rudy Toody
Post:

Rudy this is the Boinc server that does this as the stats pages are updated (20 at a time) there is some crossover ...look at other projects stats sites ...they all do this...it is normal :)


In my 38 years as a programmer, I would never consider this normal.

I will accept that this is not a Cosmology@Home problem, though.

I'll go tell BOINC to clean up their act.
17) Forums : Technical Support : Top Teams display glitch (Message 1867)
Posted 9 Aug 2007 by Profile Rudy Toody
Post:
There is a one-off problem with the display of the "Top Teams" page.

Everything is fine upon entry.

However, if you sort by "Total Credit," the #20 team is also #21 and one team is skipped.

SETI.Germany is the duplicate. Team Norway should be #21.
18) Forums : Technical Support : URGENT Problems Discussion Thread (Message 1865)
Posted 9 Aug 2007 by Profile Rudy Toody
Post:
@Rudy Toody, you're quoting the last post as if your "problem" is as severe as yeebee's was before now. Please state what your problem is. As far as I see, 3 pages down in your results, all results have found a matching CPU. In that case, just have patience.


Actually, I quoted Truck Target.

I didn't add my own message, since his problem was identical to one we were having at the time. (no work)

--Fred
19) Forums : Technical Support : No Work From Project- All Platforms (Message 1830)
Posted 8 Aug 2007 by Profile Rudy Toody
Post:
Thanks, Scott.

I'm getting WUs again.
20) Forums : Technical Support : No Work From Project- All Platforms (Message 1828)
Posted 8 Aug 2007 by Profile Rudy Toody
Post:
I posted to the Urgent Problems thread.

I have no fear.


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