1) Message boards : News : Status, March 2014 (Message 26303)
Posted 18 Mar 2014 by Profile JLDun
Post:

Second, we have been experiencing major problems with our
Windows executables for several months now.
There are "small" result differences between Windows and Linux.
After extensive testing I believe they are due to the Windows
ifort compiler. This will be verified and fixed as soon as I
return to CERN next week. In addition new builds of SixTrack
for Windows, which now include a call boinc_unzip, are failing
on Windows in at least two ways; there is a problem parsing the
hardware description (/proc/cpuinfo on Linux) and secondly we
get "cannot Create Process" errors. So, we shall first try and
build without the hopefully resposible call, and fix the result
differences. We can then resume development of the case splitting
to smaller WUs and the return of all results.


Does this mean WU reissues in the future, or are the errors consistent enough to be correctable "as-is"?
2) Message boards : LHC@home Science : Black hole question (Message 20770)
Posted 15 Nov 2008 by Profile JLDun
Post:
A Higgs boson is not a graviton, AFAIK. It should be a massive particle.

In my opinion, based on half-remembered stories (news and otherwise):

Graviton
    1. A \'graviton\' is a particle that exerts a \"gravitational force\" between two objects.
    2. Gravity (or the gravitational force) is the attraction- or [direct] pull- between two objects.



Higgs Boson

    1. A Higgs Boson is a particle that gives all other particles mass.
    2. Mass warps space. [Einstein]
    3. Gravity is the warping of space.



The difference between one and the other is more what effect you expect; to me this means mainly a difference in name...

3) Message boards : LHC@home Science : Questions regarding antimatter. (Message 20769)
Posted 15 Nov 2008 by Profile JLDun
Post:

1. How do you know how many antiprotons that are stored in the trap at a give time?

There are two ways:
1. Measure the electrical charge. (Even \"static electricity\" occurs at a certain \'electrical charge level.\')
2. Measure the mass- weigh what you have.


2. How do actually know that it is antiprotons that are in the trap an not electrons?

Electrons have a certain mass. Anti-protons have a certain mass. For any given \'electrical charge level\', compare the expected mass to the actual mass...
4) Message boards : Number crunching : Well, those pesky 0.00x pending WU's are still here...... (Message 19819)
Posted 21 Jul 2008 by Profile JLDun
Post:
Doesn't look like the server upgrade did anything

And I still have mine... so far...
5) Message boards : Number crunching : Stand back....... (Message 19704)
Posted 8 Jun 2008 by Profile JLDun
Post:
Because the first part is not quoted at all ... it may be assumed that it could be a different person saying that.

There-in lies a danger in using bracketed word and phrases in Media articles regarding quotes in interviews and other cases of 'putting words in (my/your/a person's) mouth'.

Just my 2/100's of a Quatlu


Quatlu?
6) Message boards : Number crunching : Stand back....... (Message 19694)
Posted 31 May 2008 by Profile JLDun
Post:
(I was going to make a joke about the importance of discovering the God particle, but I couldnĀ“t figure out how to phrase it humorously. Anybody want to make a go at it? :) )

Given: In most interview quotes, words or phrases listed in square brackets are implied in the original interview, but may not have been stated in the original interview quoted.
Example:
Original- 'President Bush won the last election'.
Quote- '[He] won the last election.'

After millenia of religious fighting...
"We found [the] God [particle]!"
7) Message boards : Number crunching : How often does LHC shut down? (Message 19546)
Posted 26 Apr 2008 by Profile JLDun
Post:


Sadly a) that's not how it works and b) LHC doesn't actually have much money CERN != LHC ;-)


If CERN doesn't fund LHC, who does? QMC?
If CERN doesn't fund LHC, how come they get to tell you to take the forums down for 10 days (which messed up several thousand BOINC installs)?


QFT (Quoted For Truth/I agree).
8) Message boards : Number crunching : Stil a pending credit (Message 19047)
Posted 21 Feb 2008 by Profile JLDun
Post:
Just found a way to claim credit... Have one of the results claim .015x or greater- it rounds up to .02 (in display)....
Workunit 2191773

11264167 9640704 21 Feb 2008 4:46:40 UTC 21 Feb 2008 5:01:55 UTC Over Success Done 2.39 0.00 0.01
11264164 9642550 21 Feb 2008 6:00:41 UTC 27 Feb 2008 21:32:55 UTC In Progress Unknown New --- --- ---
11264166 9645968 21 Feb 2008 6:00:57 UTC 27 Feb 2008 21:33:11 UTC In Progress Unknown New --- --- ---
11264168 6269038 21 Feb 2008 4:46:40 UTC 21 Feb 2008 6:35:20 UTC Over Success Done 3.81 0.01 0.01
11264165 9628801 21 Feb 2008 6:01:18 UTC 21 Feb 2008 6:33:59 UTC Over Success Done 7.63 0.02 0.01


Result 11264165

Claimed credit 0.0172705292323868
Granted credit 0.011780192492146
9) Questions and Answers : Windows : runing boinc minimized? (Message 18718)
Posted 17 Dec 2007 by Profile JLDun
Post:
its works but How can i make WIndows remember that???


Select BOINC manager

Then press ctrl-W.


That will get rid of the task bar entry, but keep the system tray icon.


Is it (BOINC) showing up in the Task Bar every time you reboot?
10) Message boards : Number crunching : Claimed 0 credits - still pending after all 5 results received (Message 18675)
Posted 9 Dec 2007 by Profile JLDun
Post:
I have 4 WU's still:
1812141; Oct 28/28th.
1813416; Oct 28/28th again.
1818797; Oct 30/31st.
1818805; Oct 30/31st again.
11) Message boards : Number crunching : Project encountered internal error: shared memory (Message 18607)
Posted 18 Nov 2007 by Profile JLDun
Post:
6/11/2007 5:57:28 AM|lhcathome|Fetching scheduler list
6/11/2007 5:57:33 AM|lhcathome|Master file download succeeded
6/11/2007 5:57:38 AM|lhcathome|Sending scheduler request: Requested by user. Requesting 28700 seconds of work, reporting 7 completed tasks
6/11/2007 5:57:53 AM|lhcathome|Scheduler request succeeded: got 0 new tasks
6/11/2007 5:57:53 AM|lhcathome|Message from server: Project encountered internal error: shared memory

From general discussion over at SETI@home, I've gathered it involves two (or more) "processes" trying to access a file at the same time (i.e. BOINC and an anti-virus scan). I don't know what it would be for Server Access...


Live long and BOINC!

12) Message boards : Number crunching : Stil a pending credit (Message 18594)
Posted 14 Nov 2007 by Profile JLDun
Post:
WU 1818805
WU 1818797
WU 1812416
WU 1812141
13) Message boards : LHC@home Science : "The beam can slice through 30 meters of copper." (Message 18537)
Posted 3 Nov 2007 by Profile JLDun
Post:
Not sure how reliable a news soucre zpenergy.com is.. but.. yikes!

http://www.zpenergy.com/modules.php?name=News&file=article&sid=1268

Article mentions that scientists are studying 'what if' the beam needs to be shut down in case of emergency. There are beam dumps for that.

Maybe someone will generate some work units that simulate this.

Maybe that's the reason for the short-process WU's.
14) Message boards : LHC@home Science : Magnifying light speed Questions (Message 18536)
Posted 3 Nov 2007 by Profile JLDun
Post:
The speed of light, according to relativity theory, is an absolute. Nothing goes faster than light

But, from what I somewhat remember:
Given:

    1. A photon- the particle of light- moves at a speed represented by "c"
    1. "c" represents the speed of light, or approximately 186000 mph (or mi/h) relative to No-motion/0 mph
    2. "P" represents a person testing "c" under various conditions
    3. "Pv" represents "P-of-v" or 'velocity of "P"'
    4. While Pv=0 m/s or 0 mi/h, c=186000 mi/h (approx.)



Regardless of "Pv", "P" will always find the speed of a photon moving toward or away from him to be equivalent to "c".

(ye olde joke being that the only thing faster than light is dark because it always gets there first)

And Chaos always wins against order; it's more organized. (I saw this in a Terry Pratchett book.)
15) Message boards : Number crunching : BOINC 5.10.28 (Message 18527)
Posted 2 Nov 2007 by Profile JLDun
Post:
Do you want to get banned for 31 years, your account and credits deleted at a Boinc project ? Predictor@home is your best choice.

What was his name again? and are they still doing that?
16) Message boards : Number crunching : Info on screen saver? (Message 18461)
Posted 30 Oct 2007 by Profile JLDun
Post:
The screen saver is really cool.

So do the points of light actually show how the particles stay bunched up in the beam?

From what I've seen in other posts, not really. It's just 'a bunch of pretty lights.'
17) Message boards : Number crunching : The new look bugs (Message 18383)
Posted 27 Oct 2007 by Profile JLDun
Post:
http://lhcathome.cern.ch/lhcathome/add_venue_form.php?venue=home&subset=project


Add LHC@home preferences for home

Catchable fatal error: Object of class stdClass could not be converted to string in /srv/httpd/lhcathome.cern.ch/lhcathome/html/inc/util.inc on line 339

It'll show the "Resource share" box, but no text/input below in the User Area; Left Toolbar is present.

[Edit]Using Firefox 2.0.0.7/2.0.0.8 on WinXP Home.[/Edit]
18) Questions and Answers : Preferences : Error on Website (Message 18363)
Posted 26 Oct 2007 by Profile JLDun
Post:
When

Add LHC@home preferences for work

Catchable fatal error: Object of class stdClass could not be converted to string in /srv/httpd/lhcathome.cern.ch/lhcathome/html/inc/util.inc on line 330

Regards


Evolution
Catchable fatal error: Object of class stdClass could not be converted to string in /srv/httpd/lhcathome.cern.ch/lhcathome/html/inc/util.inc on line 339

I saw it today for /add_venue_form.php?venue=home&subset=project
19) Message boards : LHC@home Science : How does magnetic storing of antimatter works? (Message 18331)
Posted 22 Oct 2007 by Profile JLDun
Post:
How does magnetic storing of antimatter works?

If I have understood this right a magnetic field is used to keep the antimatter floating in mid air so to speak and preventing it from hitting the walls in the chamber.

My knowledge of how magnets work is very elementary, just based on how magnets used in ordinary life works.


From someone else with an elementary understanding:

    1. Magnetic fields influence electrical charges.
    1.a. Transformers are based on the above point: Use a magnetic field to "spin" a current to boost its power.
    2. A major point in the definition of "anti-matter" is what type of charge the matter has.
    2.a. Electrons are 1(-), Protons are 1(+), Positrons are 1(+), "Anti-Protons" are 1(-).
    3. To magnetically influence/control anti-matter involves similar settings to controlling the "normal" matter equivalents where one goal is "Don't let it touch the sides of the container."
    3.a. I.E. Magnetically controlling Electrons is 'Electro-Magnetically' the same as "Anti-Protons."

20) Message boards : Cafe LHC : no work units ? (Message 18321)
Posted 20 Oct 2007 by Profile JLDun
Post:
I'm a newbie -- only joined in the past week -- and note that there are no work units coming down the pike to me. Is this a common occurrence?



Currently, yes.


Thanks for your quick response. I thought maybe I'd done something wrong.

Finally got my first WU's in the past three days. I'm used to it, especially due to a combination of:

    The front page reminding everyone that work 'May Not Happen' for long periods.
    Seti@Home conditioning me to Work Outages.



Next 20


©2023 CERN