LHC@home

HM, I'm participating in nearly all BOINC-Projects.

When LHC sends work, I switch all other projects to "no new work". So, if LHC has work, my boxes concentrate on LHC :-)

http://lhcathome.cern.ch/workunit.php?wuid=973422

Gotta love those P133's taking almost 4 days and 5hrs just to do 1 large WU.

Good heavens! You actually have Windows XP on that?! Is it truly installed or part of some kind of cluster?

you might get better throughput with win98 or 95 - a typical P133 has rather small memory for the huge needs of XP, and a lot of that proc time os almost certainly swapping operating system in and out whenever the app makes a system call

That's pretty funny and it's not even due to the W98 problem that causes the cpu time to increase even when a wu is preempted. It would be better off doing SETI@home and using the optimised SETI application, especially since it gets less granted credit than claimed.

Live long and crunch.

Prediction: light escaping from a large mass should lose energy---the wavelength must increase since the speed of light is constant. Stronger surface gravity produces a greater increase in the wavelength.

This is a consequence of time dilation. Suppose person A on the massive object decides to send light of a specific frequency f to person B all of the time. So every second, f wave crests leave person A. The same wave crests are received by person B in an interval of time interval of (1+z) seconds. He receives the waves at a frequency of f/(1+z). Remember that the speed of light c = (the frequency f) × (the wavelength l). If the frequency is reduced by (1+z) times, the wavelength must INcrease by (1+z) times: lat B = (1+z) × lat A. In the doppler effect, this lengthening of the wavelength is called a redshift. For gravity, the effect is called a gravitational redshift.

Observation: spectral lines from the top layer of white dwarfs are significantly shifted by an amount predicted for compact solar-mass objects. The white dwarf must be in a binary system with a main sequence companion so that the amount the total shift due to the ordinary doppler effect can be determined and subtracted out. Inside a black hole's event horizon, light is redshifted to an infinitely long wavelength.

For clarification:

My point here is trying to find how tightly time and space are connected to each other.

Roughly worded:
That, at the speed of light, does all space get covered in one time(instant) and
at the speed of stopped, does one space see all time?

A source is:
http://www.astronomynotes.com/relativity/s1.htm

Since the laws of physics do not depend on your location or motion, Einstein reasoned that the speed of light will be measured to be the same by any two observers regardless of their velocity relative to each other. For example, if one observer is in a rocket moving toward another person at half the speed of light and both observers measure the speed of a beam of light emitted by the rocket, the person at rest will get the same value the person in the rocket ship measures (about 300,000 kilometers/second) instead of 1.5 times the speed of light (=rocket speed + speed of beam of light). This assumption has now been shown to be correct in many experiments. To get the same value of the speed (= distance/time) of light, the two observers moving with respect to each other would not only disagree on the distance the light travelled as Newton said, they would also disagree on the time it took.

Einstein found that what you measure for length, time, and mass depends on your motion relative to a chosen frame of reference. Everything is in motion. As you sit in your seat, you are actually in motion around the center of the Earth because of the rapid rotation of the Earth on its axis. The Earth is in motion around the Sun, the Sun is in orbit around the center of our Galaxy, the Galaxy is moving toward a large group of galaxies, etc. When you say something has a velocity, you are measuring its change of position relative to some reference point which may itself be in motion. All motion is relative to a chosen frame of reference. That is what the word ``relativity'' means in Einstein's Relativity theories. The only way observers in motion relative to each other can measure a single light ray to travel the same distance in the same amount of time relative to their own reference frames is if their ``meters'' are different and their ``seconds'' are different! [b]Seconds and meters are relative quantities. [b]

Being part of this is whats important.
Whether its a Pentium Pro 100 or a quad dual core opteron......
.........fire up that BOINC and get crackin!!!

The historical pattern is to have "waves" of work, where a couple hundred thousand work units will be created and mostly issued, then another wave, if any, is added. After all the main waves have been issued and mostly returned, the "clean up" runs for a little bit where smaller batches are scavenged of work that is still incomplete (no quorum).

I'm keeping an eye on the Playstation 3. It's supposed to be available with a hdd and linux on it, so even if the compilers are not top notch, it could just crunch 8 (7) different tasks and should have one hell of a throughput. That would temp me to get another box again :D

Did it work?

Borandi, if your "main" machine is running Windows, you really should have a look at BoincView
it may take a couple of minutes to set up, but it makes the thing a lot easier when you're running multiple "drones" on a network.

How bad is your boinc farm???