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Search: Posts Made By: sichase
Forum: Lounge 2013-02-06, 12:36
Replies: 4,402
Views: 378,327
Posted By sichase
http://upload.wikimedia.org/wikipedia/commons/thum...

http://upload.wikimedia.org/wikipedia/commons/thumb/f/fc/Sues_skeleton.jpg/220px-Sues_skeleton.jpg

Sue pwns Richard IIII.
Forum: Lounge 2012-12-25, 16:17
Replies: 4,402
Views: 378,327
Posted By sichase
arxiv.org/abs/1201.0749...

arxiv.org/abs/1201.0749 (http://arxiv.org/abs/1201.0749): There Is No 16-Clue Sudoku: Solving the Sudoku Minimum Number of Clues Problem

This is proof by exhaustive search. It doesn't offer much...
Forum: Science & Technology 2012-10-17, 19:29
Replies: 66
Views: 37,686
Posted By sichase
The fact that we have not yet discovered element...

The fact that we have not yet discovered element 126 is not primarily due to difficulty of detection (as your speculation assumes) but rather is due to difficulty of manufacture. You need to collide...
Forum: Data 2012-09-04, 17:51
Replies: 3,486
Views: 314,637
Posted By sichase
I've got a related question. The milestone...

I've got a related question.

The milestone page shows:


Countdown to testing all exponents below M(42643801) once: 2

But the PrimeNet Summary shows only 1 NO-LL below M(42643801).

How...
Forum: Science & Technology 2012-07-06, 17:44
Replies: 51
Views: 6,054
Posted By sichase
Actually, in a Universe in which particle masses...

Actually, in a Universe in which particle masses are determined by the vacuum expectation value (VEV) of the Higgs field, this is not true. One would expect that spontaneous symmetry breaking would...
Forum: Science & Technology 2012-07-05, 19:41
Replies: 51
Views: 6,054
Posted By sichase
Agreed! Leon Lederman is a terrific experimental...

Agreed! Leon Lederman is a terrific experimental physicist, with a great nose for choosing the right people to work with and the right experiments to do. His contributions have been fundamental. But...
Forum: Science & Technology 2012-07-05, 16:50
Replies: 51
Views: 6,054
Posted By sichase
1) Yes. Explicit mass terms from the basic field...

1) Yes. Explicit mass terms from the basic field equations are dropped when constructing the SM lagrangian, and then effective masses, i.e., new terms that have the same form as the explicit mass...
Forum: Lounge 2012-03-09, 09:35
Replies: 145
Views: 7,676
Posted By sichase
Which was all just a very long winded way of...

Which was all just a very long winded way of saying, "Yeah. You're right." :=)
Forum: Lounge 2012-03-09, 09:33
Replies: 145
Views: 7,676
Posted By sichase
The problem here is largely that in very complex...

The problem here is largely that in very complex experiments like these that search for very small signals using highly selective filters, the systematic uncertainties are much harder to understand...
Forum: Soap Box 2012-01-16, 07:40
Replies: 8
Views: 956
Posted By sichase
QUACK. The "successful" 1MW test is a...

QUACK.

The "successful" 1MW test is a flat-out fraud. And as to the second link, NASA has, unfortunately, wasted taxpayer money on this one. It's nonsense. The author (Zawodny) is all over the...
Forum: Puzzles 2011-12-14, 21:01
Replies: 420
Views: 33,052
Posted By sichase
The Higgs mechanism is a bit difficult to explain...

The Higgs mechanism is a bit difficult to explain without the mathematics, IMO. That's why all the semi-popular explanations feel so unsatisfying.

The underlying problem in quantum field theory is...
Forum: Science & Technology 2011-12-06, 14:48
Replies: 2,949
Views: 267,949
Posted By sichase
There is nothing periodic about this table. It's...

There is nothing periodic about this table. It's cute, but useless.
Forum: Science & Technology 2011-10-24, 00:53
Replies: 2,949
Views: 267,949
Posted By sichase
I can't say I have a favorite physics joke. ...

I can't say I have a favorite physics joke.

But here are a few quotes that I have oft quoted because they amuse me:

Physics is not a religion. If it were, we'd have a much easier time raising...
Forum: Science & Technology 2011-10-23, 19:31
Replies: 2,949
Views: 267,949
Posted By sichase
This is not my favorite physics joke. It's both...

This is not my favorite physics joke. It's both logically and physically inconsistent.

Logically:

For causality to be violated, and the bartender to know that the neutrino is going to arrive...
Forum: Lounge 2011-10-07, 19:33
Replies: 40
Views: 3,521
Posted By sichase
iSad

iSad
Forum: Science & Technology 2011-10-03, 17:48
Replies: 2,949
Views: 267,949
Posted By sichase
Your numbers are right. The fact that the...

Your numbers are right. The fact that the deBroglie wavelength of an electron is less than a couple of nm is precisely why the limiting resolution of an electron microscope is so much higher than for...
Forum: Science & Technology 2011-10-03, 17:31
Replies: 2,949
Views: 267,949
Posted By sichase
Thumbs down Hi Paul. Oscillations amongst the elements of a...

Hi Paul. Oscillations amongst the elements of a flavor tuplet is just one possible mechanism for flavor number violation. In this particular case there is a ton of experimental (non)evidence for what...
Forum: Science & Technology 2011-09-26, 21:36
Replies: 2,949
Views: 267,949
Posted By sichase
That's quite an understatement. IIRC, conversion...

That's quite an understatement. IIRC, conversion of Cl to Ar (in the classic "dry cleaning fluid" type experiments) has a neutrino energy threshold around 800keV. Later gallium experiments got down...
Forum: Science & Technology 2011-09-24, 01:20
Replies: 2,949
Views: 267,949
Posted By sichase
I have to give you a very unsatisfying answer....

I have to give you a very unsatisfying answer. For neutrinos, the observed fact is that the mass eigenstates are not the flavor eigenstates. That is, the observed particles don't have exact leptonic...
Forum: Science & Technology 2011-09-23, 17:32
Replies: 2,949
Views: 267,949
Posted By sichase
Hi Paul, Look up "de Broglie wavelength"....

Hi Paul,

Look up "de Broglie wavelength". You'll see that the characteristic quantum wavelength of a non-relativistic electron is dominated by its rest mass in exactly the way you expect that it...
Forum: Information & Answers 2011-08-18, 19:27
Replies: 19
Views: 1,904
Posted By sichase
180% _does_ mean 90% per core. Your laptop is...

180% _does_ mean 90% per core. Your laptop is designed to run at 100% per core indefinitely, so provided that you place it such that it can properly ventilate itself, you should have no problem...
Forum: Data 2011-07-11, 21:40
Replies: 3,486
Views: 314,637
Posted By sichase
10 of the 18 22M exponents are manual assignments...

10 of the 18 22M exponents are manual assignments to "robdinwor" dated 2010-1-30. There seems to be no updates since then. I wonder if we can find out if they have been abandoned or if he/she is...
Forum: Data 2011-05-04, 18:46
Replies: 3,486
Views: 314,637
Posted By sichase
23853343 --Scott

23853343

--Scott
Forum: Data 2011-05-04, 18:21
Replies: 3,486
Views: 314,637
Posted By sichase
It appears that one of the 69 candidates in the...

It appears that one of the 69 candidates in the 23M range is not currently assigned for double checking (i.e., there are 68 assignments) but is also not listed as available for assignment.

Is...
Forum: Lounge 2010-12-16, 05:06
Replies: 4,402
Views: 378,327
Posted By sichase
"Ants solve the Tower of Hanoi." Big deal....

"Ants solve the Tower of Hanoi."

Big deal. I can solve the Tower of Hanoi, too. And there is only one of me.

--Scott
Showing results 1 to 25 of 57

 
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