March 2009 Archives | Musings

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Austin Weather^#

Tuesday

Mostly Cloudy
High: 43°F
PoP: 100%

Tuesday Night

Mostly Cloudy
Low: 37°F
PoP: 5%

Wednesday

Mostly Sunny
High: 44°F
PoP: 0%

Wednesday Night

Mostly Clear
Low: 53°F
PoP: 0%

Currently:

Fog, 62.0°F (16.7°C)
(Doppler Radar)

MathML

$MathML logo$ Posts with this logo use MathML. To see the equations, you either need Mozilla or a MathML plugin for IE/Win. You will also need to install some fonts. The posts were authored in itex (an extension of WebTeX) using the itexToMML Text Filter plugin for MovableType (the README file).

Calendar

March 2009's Entries

Fun (With) Video
- Mar 2, 2009
- Fantastic fingering ferrofluids.

Random Past Entries

Rewrite Magic
- May 20, 2007
- On using mod_rewrite’s RewriteMap directive for fun and profit.
Basher
- Feb 1, 2003
- Brad DeLong takes a break from a long series of excellent posts on the Bush economic “plan” to take…
Surface Waves
- Sep 18, 2009
- More elementary hydrodynamics. Why? ‘Cuz it’s fun.
30 Seconds
- Feb 1, 2004
- Apparently, CBS, in its corporate wisdom, won’t air their ad during the Superbowl. But that’s no reason for me not…
A Fearful Symmetry
- Nov 10, 2004
- Longtime readers of this blog will know that I think that discrete symmetries (particularly, those that suppress proton decay…

MT How-To

Validating Comments
- May 3, 2003
- Run comments through the W3C Validator before posting. The first in a series of “How-To” articles on MovableType.
Bullet-Proofing II
- May 11, 2003
- More bullet-proofing tips to ensure your blog is valid XHTML
Text Filters for Comments
- May 19, 2003
- Allow a choice of Text Filters in your Comment-entry form.
Serve it Up!
- May 26, 2003
- Serving your blog as XHTML 1.1 with a MIME-type of application/xhtml+xml.
<abbr>, <acronym>, Accessibility & ...
- Sep 10, 2003
- A tutorial on marking up abbreviations and an MT plugin which makes the job easy.
Forcing Comment Previews
- Jun 16, 2004
- Introducing the MTHash plugin, and a reliable way to force Comment Previews.
Internationalization and Trackbacks
- Feb 17, 2005
- In which our hero gets fed up with gibberish Trackbacks and takes matters in his own hands.

Recent Comments

Audiophilia (10)
- polla007
  - Apr 16, 2018 12:04
  - Love reading it mate. I always look for this type of info.
- Antonio Garcia
  - Feb 25, 2017 10:16
  - It is interesting to do the following experiment. With AUDACITY play at the same time file A+B. The result is ...
- John
  - Feb 20, 2014 06:52
  - I tried the files on my headphones but I still can’t find the difference. I guess I should buy more ...
- cvj
  - Feb 9, 2014 19:52
  - To be honest, I can not hear a brightness difference at all. Perhaps if my headphones were handy…. but on ...
- Michael Fremer
  - Feb 8, 2014 15:46
  - Well I’d say that Andy and his cohorts called it correctly.

Action-Angle Variables (24)
- Matthew Kvalheim
  - Apr 14, 2018 20:23
  - Sorry — when I said “global”, what I really meant was globally on defined on a torus or on a ...
- Jacques Distler
  - Apr 14, 2018 20:06
  - But then there is the question: why do the local 1-forms dφ id\varphi^i patch together to yield well-defined global 1-forms? ...
- Matthew Kvalheim
  - Apr 14, 2018 18:57
  - Interesting. I didn’t know that result. Thanks for the reference. Using that result, given (K 1,…,K n)(K_1,\ldots,K_n), we can locally ...
- Jacques Distler
  - Apr 14, 2018 12:12
  - It seems to me that your complaint, here, is purely a local one, and it is the thing that is ...
- Matthew Kvalheim
  - Apr 14, 2018 03:28
  - ω\omega is a fixed, known 2-form. I completely agree. Given ω\omega and the K iK_i, this defines a ...

MathML Update (1)
- Random Bloke
  - Apr 7, 2018 00:38
  - PW has a new post and he mentions you and an interaction with you in the past. Can you comment ...

Statistical Innumeracy (2)
- Peter Theophilopoulos
  - May 20, 2017 13:31
  - The issue that many times an benign fibroid cyst leads to fears of the worst. My wife has had two ...
- Jim Lifter
  - Jan 15, 2011 15:34
  - I couldn’t agree more. We make such irrational decisions when such great data is available. Your example about breast cancer ...

Effective Field Theory of Inflation (5)
- Jacques Distler
  - Apr 9, 2017 11:47
  - Would it be correct to say that I can write down such an effective field theory for any frw coupled ...
- Nirmalya
  - Apr 4, 2017 03:05
  - Dear Jacques, Would it be correct to say that I can write down such an effective field theory for any ...
- Jacques Distler
  - Jan 12, 2008 22:33
  - In a non-Lorentz-invariant effective theory, the power counting can be rather different from what you would find in a Lorentz-invariant ...
- wandering.the.cosmos
  - Jan 12, 2008 22:17
  - Dear Jacques, I’m just a grad student here. This paper reminds me of a question I’ve been wondering about. In ...
- Robert
  - Jan 9, 2008 05:00
  - Thats indeed a very nice and carefull paper. Thanks for the link.

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March 2, 2009

Fun (With) Video

Been rather busy with other matters, but I thought I would share a cool little physics video with you.

Continue reading “Fun (With) Video” ...

Posted by distler at 10:17 AM | Permalink | Followups (17)