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	<title>Brooks Moses: Notes on Divergent Simulations</title>
	<link>http://notes.dpdx.net</link>
	<description>Fluid Dynamics, Computer Simulations, and Assorted Tinkering</description>
	<lastBuildDate>Tue, 06 May 2008 05:23:44 +0000</lastBuildDate>
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		<title>An interesting little phenomenon</title>
		<description><![CDATA[So, earlier today, Jeff Atwood wrote a rather interesting post about people who aren&#8217;t willing to pay money for software.  And in there, he made this comment:
It&#8217;s tempting to ascribe this to the &#8220;cult of no-pay&#8221;, programmers and users who simply won&#8217;t pay for software no matter how good it is, or how inexpensive [...]]]></description>
		<link>http://notes.dpdx.net/2008/04/10/an-interesting-little-phenomenon/</link>
			</item>
	<item>
		<title>Daylight Saving Time updates for Windows 2000 and 98</title>
		<description><![CDATA[I just found out today, when I turned my laptop on, that Microsoft&#8217;s &#8220;Windows Update&#8221; updates for Windows 2000 do not include a fix to make it compatible with the new version of Daylight Saving Time.  (And, yes, apparently &#8220;Saving&#8221; is correct and &#8220;Savings&#8221; incorrect.  I didn&#8217;t know that before.)  Apparently since [...]]]></description>
		<link>http://notes.dpdx.net/2007/03/14/daylight-saving-time-updates-for-windows-2000-and-98/</link>
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		<title>Time synchronization in a VMWare box running GNU/Linux</title>
		<description><![CDATA[For a lot of the GCC and GNU Fortran development work that I&#8217;m doing, it&#8217;s much more convenient to work on a GNU/Linux box &#8212; the compilation process is set up in a way that is rather slow on Windows (even under Cygwin), and so testing changes is much quicker under Linux.  On the [...]]]></description>
		<link>http://notes.dpdx.net/2007/03/07/time-synchronization-in-a-vmware-box-running-gnulinux/</link>
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		<title>listings 1.4</title>
		<description><![CDATA[I sent off the tarfile for the listings 1.4 distribution to CTAN this afternoon.  It should be posted to the official mirrors within the next day or two.
This marks the first significant bugfix release in nearly three years; I took over the official maintenance of this package early last year, after the previous maintainer [...]]]></description>
		<link>http://notes.dpdx.net/2007/02/27/listings-14/</link>
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		<title>Customer Support Fun with Academic Journals</title>
		<description><![CDATA[I&#8217;ve been spending most of today catching up on a huge backlog of journal citation alerts and downloading the relevant articles to read before I start writing the &#8220;other work&#8221; section of my dissertation in the next week or two.  So I&#8217;ve been noticing a few things about the websites of various journal publishers.
One [...]]]></description>
		<link>http://notes.dpdx.net/2007/01/09/customer-support-fun-with-academic-journals/</link>
			</item>
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		<title>Slides from the 2006 APS fluid dynamics meeting.</title>
		<description><![CDATA[The 2006 annual conference of the American Physical Society&#8217;s Division of Fluid Dynamics just ended a few hours ago, here in Tampa. As usual, I&#8217;ve put the slides from my talk up on dpdx.net/research/papers.  Direct links: abstract, Slides in PDF form, and ConTeXt source for the slides. It&#8217;s a fun conference; unlike most, the [...]]]></description>
		<link>http://notes.dpdx.net/2006/11/21/slides-from-the-2006-aps-fluid-dynamics-meeting/</link>
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		<title>Fortran&#8217;s 50th Birthday</title>
		<description><![CDATA[IBM&#8217;s very first Fortran manual, Programmer&#8217;s Reference Manual: Fortran Automatic Coding System for the IBM 704, was dated October 15, 1956 &#8212; 50 years ago today.  There are a couple of different scanned copies of it available online; bitsavers.org has one, and fortran.com has an autographed one.
There&#8217;s an old joke that, in a hundred [...]]]></description>
		<link>http://notes.dpdx.net/2006/10/15/fortrans-50th-birthday/</link>
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		<title>Penny Smith&#8217;s Proof on the Navier-Stokes Equations</title>
		<description><![CDATA[This week&#8217;s big news in fluid flow simulation is Penny Smith&#8217;s existence proof for smooth solutions of the Navier-Stokes equations.  (See also this in-depth explanation of the proof, and various other mentions of it here, here, and here.)
(Update: Regrettably, the article has been withdrawn due to a &#8220;serious flaw&#8221;.  The piece described below [...]]]></description>
		<link>http://notes.dpdx.net/2006/10/06/penny-smiths-proof-on-the-navier-stokes-equations/</link>
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		<title>Why can&#8217;t a car engine run on water?</title>
		<description><![CDATA[I recently came across a mention of yet another inventor who supposedly has built a car engine that runs on water.  The claim is in a video which doesn&#8217;t play on my computer, so I don&#8217;t know much for details of what he&#8217;s actually claiming.  But even without watching the video, I can [...]]]></description>
		<link>http://notes.dpdx.net/2006/05/23/why-cant-a-car-engine-run-on-water/</link>
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		<title>What would an expert want with recipes?</title>
		<description><![CDATA[Jeff Atwood makes the point that although experts generally don&#8217;t follow recipes (such as &#8220;best practices&#8221;) literally, the recipes are still valuable:

The idea that a recipe (eg, a best practice, a methodology, or a maturity model) is completely worthless is just as wrongheaded as the idea that everything should be based on a strict recipe. [...]]]></description>
		<link>http://notes.dpdx.net/2006/05/23/what-would-an-expert-want-with-recipes/</link>
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		<title>Nerd Bravado, redux.</title>
		<description><![CDATA[I was reading Kristin Abkemeier&#8217;s post on what it feels like to be a &#8220;geek girl&#8221;, and she linked to Matt McIrvin&#8217;s post about Nerd Bravado, which is the claim (originally made by an anonymous poster on yet a third blog post that I haven&#8217;t read) that in order to have any cred as an [...]]]></description>
		<link>http://notes.dpdx.net/2006/05/12/nerd-bravado-redux/</link>
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		<title>Noodling about a MetaLanguage</title>
		<description><![CDATA[I&#8217;ve been reading a few articles recently about language syntax and semantics, and what makes for a good computer language these days.  (For instance, this article by Larry O&#8217;Brien.)  One theme that struck me was the idea that the power of a language is in its extensibility — that is, in the rules [...]]]></description>
		<link>http://notes.dpdx.net/2006/05/07/noodling-about-a-metalanguage/</link>
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		<title>Slides from DFD &#8216;05 presentation posted</title>
		<description><![CDATA[I just added the slides from my presentation at the 58th annual November meeting of the APS&#8217;s Division of Fluid Dynamics to my publications page.  This is largely a modified version of the presentation I gave at the ILASS meeting last May.
Presentations at APS meetings are only 10 minutes long, instead of the 25 [...]]]></description>
		<link>http://notes.dpdx.net/2006/05/06/slides-from-dfd-05-presentation-posted/</link>
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		<title>On replacing the right light bulb.</title>
		<description><![CDATA[A few days ago, the front left turn signal in my wife&#8217;s Geo Metro stopped working, and so one of my chores today was to replace it.  I went down to the garage with a pair of screwdrivers and the new bulb, expecting that it would be a pretty simple repair.
A 1997 Geo Metro [...]]]></description>
		<link>http://notes.dpdx.net/2006/04/29/on-replacing-the-right-light-bulb/</link>
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		<title>Free-software licenses: requirements vs. requests.</title>
		<description><![CDATA[I&#8217;ve been thinking quite a lot about free software licenses lately, and how important it is to get them right.  A couple of recent events will serve to illustrate some of the important points:

The &#8220;listings&#8221; package for LaTeX is invaluable for including computer source code in a document.  It&#8217;s something like syntax highlighting [...]]]></description>
		<link>http://notes.dpdx.net/2006/04/24/free-software-licenses-and-obligations/</link>
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		<title>OpenFOAM-1.3 Cygwin port posted.</title>
		<description><![CDATA[After a couple of weeks of work (in and among the other things I was doing), I&#8217;ve finished a releasable version of the OpenFOAM-1.3 Cygwin port.  I&#8217;ve stuck it all in a source .tar.gz file and a compiled-binaries .tar.gz file, and updated the openfoam-cygwin page with links and updated instructions and things.  There&#8217;s [...]]]></description>
		<link>http://notes.dpdx.net/2006/04/10/openfoam-13-cygwin-port-posted/</link>
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		<title>Random Diversions on Shuffling Cards</title>
		<description><![CDATA[I&#8217;ve been thinking a lot about the idea of practicing programming lately, after reading Steve Yegge&#8217;s &#8220;rant&#8221; on the subject.  His claim is that programming is a lot like playing guitar – just doing a lot of it doesn&#8217;t make you any better; you have to specifically do things that will improve them.
Dave Thomas [...]]]></description>
		<link>http://notes.dpdx.net/2006/04/06/random-diversions-on-shuffling-cards/</link>
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		<title>My software port has a user!</title>
		<description><![CDATA[The good news: Someone&#8217;s using my Windows port of OpenFOAM.  It&#8217;s nice to know that it&#8217;s actually going to be useful to somebody.
The bad news: I know this, of course, because they&#8217;ve posted a bug report to say it doesn&#8217;t work for them.
Turns out that a large part of the problem was fairly obvious [...]]]></description>
		<link>http://notes.dpdx.net/2006/03/28/my-software-port-has-a-user/</link>
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		<title>Fixing AC power plugs in various HP and Compaq laptops</title>
		<description><![CDATA[(This is a slightly-edited repost of an article I wrote elsewhere, back in 2004.)
Some time ago, I posted a comment on This Is Broken, noting my frustration with motherboard-mounted AC power jacks on laptops, and noting that I had fixed a couple of them by following some online directions.  Several people asked me to [...]]]></description>
		<link>http://notes.dpdx.net/2006/03/18/fixing-ac-power-plugs-in-various-hp-and-compaq-laptops/</link>
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		<title>Why Simulating Free-Surface Flow is Difficult, Part 2</title>
		<description><![CDATA[(This is a continuation of Why Simulating Free-Surface Flow is Difficult, Part 1.)
In Part 1 of this series, I talked about why it&#8217;s difficult to do an accurate computer simulation of a single drop dripping from a faucet.  That&#8217;s a very simple example of a free-surface flow, however, and many of the flows that [...]]]></description>
		<link>http://notes.dpdx.net/2006/03/17/why-simulating-free-surface-flow-is-difficult-part-2/</link>
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