Search found 78 matches

by josch222
Sat Apr 03, 2010 7:43 am
Forum: Science
Topic: Let's go hump hunting!
Replies: 86
Views: 27415

Re: Remember the facts

(besides 50Hz ;-) The truth is, there is not 50 Hz in the mains, the frequency is slightly changing throughout the day. See here for instance. But I don't see how these slight changes might cause the hump, the interference by far cannot go to 3.5 kHz IMO. Of course you can't keep exactly 50Hz, ever...
by josch222
Fri Apr 02, 2010 9:31 pm
Forum: Science
Topic: Let's go hump hunting!
Replies: 86
Views: 27415

Re: Let's go hump hunting!

if looking for a mechanical vibration in the tunnel, would they be better to bolt some geo-phones to the walls/floor ? Dave It depends: If you are sure it is coupled through the floor then yes. But it may be something that is generated in the magnets itself, for example in pipes vibration can occur...
by josch222
Fri Apr 02, 2010 7:39 pm
Forum: Science
Topic: Let's go hump hunting!
Replies: 86
Views: 27415

Re: Remember the facts

Although I think we mustn't immediately reject strange proposals, I find it unlikely that the ELF or LF has the behaviour of the hump: 2.6 to 3.7 kHz, slowly sweeping in frequency between the two in a time of 7 to 10 minutes. Also, I find it hard to believe the source would come from so far away, b...
by josch222
Fri Apr 02, 2010 1:54 pm
Forum: Science
Topic: Let's go hump hunting!
Replies: 86
Views: 27415

Re: Let's go hump hunting!

I searched the net because I knew there are people who are observing ELF and LF. I'm pretty sure that there is already data, at least at the military but it would be a little bit difficult to get it. I did not found any public research institution or the like yet, but this may be helpful: http://lwc...
by josch222
Fri Apr 02, 2010 10:36 am
Forum: Science
Topic: Let's go hump hunting!
Replies: 86
Views: 27415

Re: Let's go hump hunting!

Hi, have they considered ELF efects (Shumann resonances http://en.wikipedia.org/wiki/Schumann_resonances , U-Boat comm.) or LF sources (and all their possible mixing products)? Maybe it helps to place some sensitive measurement equipment some km away from all the noise generated by CERN itself and l...
by josch222
Thu Apr 01, 2010 10:08 pm
Forum: The Accelerator
Topic: April 1st LHC prank thread
Replies: 5
Views: 2500

Re: April 1st LHC prank thread

From the LHCb eLog:
-------------------------------------------------------------------
6677 01-Apr 22:53 LHC Comments
Ramping down
new fill for physics

ATLAS has just called: they found the
HIGGS during the squeeze!!!
-------------------------------------------------------------------
by josch222
Tue Mar 30, 2010 12:45 pm
Forum: The Accelerator
Topic: Current Events Discussion
Replies: 512
Views: 106532

Re: Current Events Discussion

Nice comment from the LHCb eLog: --------------------------------------------------------------------------------- 6393 30-Mar 14:37 LHC Comments More than 1h of stable beams! No black holes ...yet --------------------------------------------------------------------------------- :angry-steamingears:...
by josch222
Mon Mar 29, 2010 5:54 pm
Forum: The Accelerator
Topic: Current Events Discussion
Replies: 512
Views: 106532

Re: Current Events Discussion

Collisions tonight? Maybe at 3.5TeV? https://lhc-commissioning.web.cern.ch/lhc-commissioning/news-2010/presentations/week13/Beam_commissioning_20100329_1700.pdf It says on the last Page: • 02:00 -03:00: Back at 450 GeV–Colliding bunch pattern Single_2b_1_1_1 with B1 (1, 17851), B2 (1, 8911)-Checking...
by josch222
Sun Mar 28, 2010 1:30 pm
Forum: The Accelerator
Topic: Current Events Discussion
Replies: 512
Views: 106532

Re: Current Events Discussion

Comments 28-03-2010 05:31:38 : We are stuck with ALICE, no way to contact the ALICE ControlRoom. We don't have yet the injection permit because of ALICE. Physics coordinator contacted to unblock the situation. That was only the last comment from a long story (from the LHCb-eLog): 6107 28-Mar 04:01 ...
by josch222
Wed Mar 10, 2010 5:25 pm
Forum: Off topic
Topic: Tip: Automatic reload of URLs in Opera
Replies: 4
Views: 5588

Re: Tip: Automatic reload of URLs in Opera

Thanks, oxodoes
and greetings from the east end ;-)

If you ever wondered where all the planes in the blue sky above the town are heading,
just take a look:
http://www.flightradar24.com/?lat=50d78 ... 25&zoom=10
click on the plane symbols
by josch222
Wed Mar 10, 2010 4:20 pm
Forum: Off topic
Topic: Tip: Automatic reload of URLs in Opera
Replies: 4
Views: 5588

Tip: Automatic reload of URLs in Opera

Hi, a question from Harbles at the US/LHC-Blog brought me to this and I think it may be of interest for others too: don’t know about other browsers but Opera has a feature for automatic reload in adjustable intervals. Simply right-click at an open web-page and select the "feature automatic reload" o...
by josch222
Thu Jan 14, 2010 12:04 pm
Forum: Science
Topic: S C I E N C E
Replies: 22
Views: 7901

Re: S C I E N C E

Yes I read that, but the point is - does the number of cosmic rays influencing our solar system is smaller than previously thought? Why do you think so? We only know about cosmic rays because we "see" them in our atmosphere. If the heliosphere shields some of them, it only means that there are more...
by josch222
Sat Jan 09, 2010 9:32 am
Forum: The Accelerator
Topic: Post shutdown things to do
Replies: 13
Views: 3435

Re: Post shutdown things to do

I see that we got 2 cryo sectors in the green already... now I understand why we got so much snow here in The Netherlands this winter :angry-chillpill: :angry-chillpill: This is OT, but I think the guy who wrote the article in the following link brought together some nice data and diagrams that exp...
by josch222
Sun Dec 20, 2009 12:15 pm
Forum: Quantum Philosophy
Topic: False Vacuum
Replies: 38
Views: 17100

Re: False Vacuum

The fact that I don't have any control over these things is exactly the scary part. Sorry to annoy you, but a few more questions - 1. Does a really low temperature or a really high temperature like those in the LHC are related to vacuum bubbles? 2. If a bubble vacuum was formed, how long would it t...
by josch222
Fri Dec 18, 2009 5:31 pm
Forum: Science
Topic: Uncertainty in calculations
Replies: 12
Views: 2981

Re: Uncertainty in calculations

The argument would be that infinite-series solutions in e.g. calculus, are based on strict, hard 1:1 correspondences of physical locations with physical objects. Wouldn't this be contrary to quantum mechanics? Of course you need different math. formulas to describe different things, or more apt for...