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	<title>Bayesian Estimation in SPECT</title>
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	<description>Single Photon Emission Computed Tomography</description>
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		<title>Bayesian Estimation in SPECT</title>
		<link>http://bayesspect.wordpress.com</link>
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		<item>
		<title>Adapting the Variance-Covariance Matrix</title>
		<link>http://bayesspect.wordpress.com/2011/05/02/adapting-the-variance-covariance-matrix/</link>
		<comments>http://bayesspect.wordpress.com/2011/05/02/adapting-the-variance-covariance-matrix/#comments</comments>
		<pubDate>Mon, 02 May 2011 18:35:01 +0000</pubDate>
		<dc:creator>J. Q. McClintic</dc:creator>
				<category><![CDATA[Software]]></category>
		<category><![CDATA[abcima]]></category>
		<category><![CDATA[backward coupling]]></category>
		<category><![CDATA[bcima]]></category>
		<category><![CDATA[challenges]]></category>
		<category><![CDATA[efficiency]]></category>
		<category><![CDATA[ima]]></category>
		<category><![CDATA[mcmc]]></category>
		<category><![CDATA[monte carlo]]></category>
		<category><![CDATA[spect]]></category>
		<category><![CDATA[statistics]]></category>

		<guid isPermaLink="false">http://bayesspect.wordpress.com/?p=140</guid>
		<description><![CDATA[As has been noted before, there have been instances of chains simply failing to mix. While this seems rather silly in principle (sooner or later, after all, some mixing should happen and it should eventually be good enough to get convergence by various ergodicity theorems), it is rather annoying in practice. In thinking about this [...]<img alt="" border="0" src="http://stats.wordpress.com/b.gif?host=bayesspect.wordpress.com&amp;blog=4090232&amp;post=140&amp;subd=bayesspect&amp;ref=&amp;feed=1" width="1" height="1" />]]></description>
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			<media:title type="html">J. Q. McClintic</media:title>
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		<item>
		<title>Small Optimizations and Numerical integration</title>
		<link>http://bayesspect.wordpress.com/2011/03/26/small-optimizations-and-numerical-integration/</link>
		<comments>http://bayesspect.wordpress.com/2011/03/26/small-optimizations-and-numerical-integration/#comments</comments>
		<pubDate>Sat, 26 Mar 2011 01:25:33 +0000</pubDate>
		<dc:creator>J. Q. McClintic</dc:creator>
				<category><![CDATA[Software]]></category>
		<category><![CDATA[ima]]></category>
		<category><![CDATA[mcmc]]></category>
		<category><![CDATA[next steps]]></category>

		<guid isPermaLink="false">http://bayesspect.wordpress.com/?p=137</guid>
		<description><![CDATA[I&#8217;ve been thinking and reading about little ways in which I can numerically optimize my code. While on the one hand preallocated memory, etc, can go a long way, I am also thinking about algorithms. One area in particular is the numerical integrations which need to happen over and over and over again in the [...]<img alt="" border="0" src="http://stats.wordpress.com/b.gif?host=bayesspect.wordpress.com&amp;blog=4090232&amp;post=137&amp;subd=bayesspect&amp;ref=&amp;feed=1" width="1" height="1" />]]></description>
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			<media:title type="html">J. Q. McClintic</media:title>
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		<title>Adaptation Schemes for IMA</title>
		<link>http://bayesspect.wordpress.com/2011/01/10/adaptation-schemes-for-ima/</link>
		<comments>http://bayesspect.wordpress.com/2011/01/10/adaptation-schemes-for-ima/#comments</comments>
		<pubDate>Mon, 10 Jan 2011 21:26:37 +0000</pubDate>
		<dc:creator>J. Q. McClintic</dc:creator>
				<category><![CDATA[Progress]]></category>
		<category><![CDATA[abcima]]></category>
		<category><![CDATA[challenges]]></category>
		<category><![CDATA[mcmc]]></category>
		<category><![CDATA[metropolis hastings]]></category>
		<category><![CDATA[monte carlo]]></category>
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		<guid isPermaLink="false">http://bayesspect.wordpress.com/?p=134</guid>
		<description><![CDATA[I have been reading about adaptation schemes since my origional scheme has some major problems (as has been discussed before) and I am trying to be somewhat less naive in my approach. Interestingly enough, my big issue at the moment is trying to come up with an intelligent way to do something called &#8220;diminishing adaptation&#8221; [...]<img alt="" border="0" src="http://stats.wordpress.com/b.gif?host=bayesspect.wordpress.com&amp;blog=4090232&amp;post=134&amp;subd=bayesspect&amp;ref=&amp;feed=1" width="1" height="1" />]]></description>
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		<slash:comments>0</slash:comments>
	
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			<media:title type="html">J. Q. McClintic</media:title>
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		<title>Errors, Small Samples, Random Chance, and Bugs</title>
		<link>http://bayesspect.wordpress.com/2011/01/06/errors-small-samples-random-chance-and-bugs/</link>
		<comments>http://bayesspect.wordpress.com/2011/01/06/errors-small-samples-random-chance-and-bugs/#comments</comments>
		<pubDate>Thu, 06 Jan 2011 18:04:00 +0000</pubDate>
		<dc:creator>J. Q. McClintic</dc:creator>
				<category><![CDATA[Progress]]></category>
		<category><![CDATA[Software]]></category>
		<category><![CDATA[abcima]]></category>
		<category><![CDATA[bcima]]></category>
		<category><![CDATA[ima]]></category>
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		<category><![CDATA[metropolis hastings]]></category>
		<category><![CDATA[monte carlo]]></category>
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		<category><![CDATA[progress]]></category>
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		<category><![CDATA[testing]]></category>

		<guid isPermaLink="false">http://bayesspect.wordpress.com/?p=132</guid>
		<description><![CDATA[The title aptly sums up the issues that my project advisor (recall, I started this project four years ago in university and then the life after college intervened to slow things down) have been fighting over the holidays while trying to prep for both a talk and the still eventual paper submission. All this has [...]<img alt="" border="0" src="http://stats.wordpress.com/b.gif?host=bayesspect.wordpress.com&amp;blog=4090232&amp;post=132&amp;subd=bayesspect&amp;ref=&amp;feed=1" width="1" height="1" />]]></description>
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		<slash:comments>0</slash:comments>
	
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			<media:title type="html">J. Q. McClintic</media:title>
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		<title>Adaptation Going Forward</title>
		<link>http://bayesspect.wordpress.com/2010/12/30/adaptation-going-forward/</link>
		<comments>http://bayesspect.wordpress.com/2010/12/30/adaptation-going-forward/#comments</comments>
		<pubDate>Thu, 30 Dec 2010 03:29:04 +0000</pubDate>
		<dc:creator>J. Q. McClintic</dc:creator>
				<category><![CDATA[Uncategorized]]></category>
		<category><![CDATA[abcima]]></category>
		<category><![CDATA[bcima]]></category>
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		<category><![CDATA[efficiency]]></category>
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		<category><![CDATA[metropolis hastings]]></category>
		<category><![CDATA[monte carlo]]></category>
		<category><![CDATA[next steps]]></category>

		<guid isPermaLink="false">http://bayesspect.wordpress.com/?p=130</guid>
		<description><![CDATA[After failing to make any progress on the software package, I was graced with a copy of a book about Monte Carlo methods using R (citation to follow) with a nice little section on adaptation (nothing on backward coupling at first glance, so there is at least something new in my work) and it talked [...]<img alt="" border="0" src="http://stats.wordpress.com/b.gif?host=bayesspect.wordpress.com&amp;blog=4090232&amp;post=130&amp;subd=bayesspect&amp;ref=&amp;feed=1" width="1" height="1" />]]></description>
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		<slash:comments>0</slash:comments>
	
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			<media:title type="html">J. Q. McClintic</media:title>
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		<item>
		<title>Draft Paper, Posteriors and Errors</title>
		<link>http://bayesspect.wordpress.com/2010/07/24/draft-paper-posteriors-and-errors/</link>
		<comments>http://bayesspect.wordpress.com/2010/07/24/draft-paper-posteriors-and-errors/#comments</comments>
		<pubDate>Sat, 24 Jul 2010 08:03:57 +0000</pubDate>
		<dc:creator>J. Q. McClintic</dc:creator>
				<category><![CDATA[Progress]]></category>
		<category><![CDATA[Writing]]></category>
		<category><![CDATA[abcima]]></category>
		<category><![CDATA[bcima]]></category>
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		<guid isPermaLink="false">http://bayesspect.wordpress.com/?p=126</guid>
		<description><![CDATA[So a draft version of an academic paper should be on its way out to the editors in a few days. So hopefully all will go well. I think I&#8217;ll probably get a copy of my published paper framed. It&#8217;s not very often something like that happens to a guy like me. Once the paper [...]<img alt="" border="0" src="http://stats.wordpress.com/b.gif?host=bayesspect.wordpress.com&amp;blog=4090232&amp;post=126&amp;subd=bayesspect&amp;ref=&amp;feed=1" width="1" height="1" />]]></description>
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			<media:title type="html">J. Q. McClintic</media:title>
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		<title>Simulations Have Ran</title>
		<link>http://bayesspect.wordpress.com/2010/05/11/simulations-have-ran/</link>
		<comments>http://bayesspect.wordpress.com/2010/05/11/simulations-have-ran/#comments</comments>
		<pubDate>Tue, 11 May 2010 22:59:25 +0000</pubDate>
		<dc:creator>J. Q. McClintic</dc:creator>
				<category><![CDATA[Progress]]></category>
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		<category><![CDATA[Writing]]></category>
		<category><![CDATA[abcima]]></category>
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		<category><![CDATA[transition]]></category>

		<guid isPermaLink="false">http://bayesspect.wordpress.com/?p=124</guid>
		<description><![CDATA[Now that all the ABCIMA runs are done I can start working out imagery. The only small issue I&#8217;ve observed is that the adaptation seems to mean that if the mixing is poor on the initial couple chains then each subchain is going to be poor. This places a high emphasis on finding ways to [...]<img alt="" border="0" src="http://stats.wordpress.com/b.gif?host=bayesspect.wordpress.com&amp;blog=4090232&amp;post=124&amp;subd=bayesspect&amp;ref=&amp;feed=1" width="1" height="1" />]]></description>
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		<slash:comments>0</slash:comments>
	
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			<media:title type="html">J. Q. McClintic</media:title>
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		<title>Running Examples</title>
		<link>http://bayesspect.wordpress.com/2010/05/11/running-examples/</link>
		<comments>http://bayesspect.wordpress.com/2010/05/11/running-examples/#comments</comments>
		<pubDate>Tue, 11 May 2010 07:36:07 +0000</pubDate>
		<dc:creator>J. Q. McClintic</dc:creator>
				<category><![CDATA[Progress]]></category>
		<category><![CDATA[Writing]]></category>
		<category><![CDATA[abcima]]></category>
		<category><![CDATA[backward coupling]]></category>
		<category><![CDATA[bcima]]></category>
		<category><![CDATA[challenges]]></category>
		<category><![CDATA[Goal]]></category>
		<category><![CDATA[ima]]></category>
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		<guid isPermaLink="false">http://bayesspect.wordpress.com/?p=121</guid>
		<description><![CDATA[So far I&#8217;ve done eight example runs. Turns out the BCIMA runs for images one and three are just as bad as the IMA runs where becoming stationary or near stationary is concerned. So there are some mixing problems. Images two and four are doing better to the point where mixing seems fine. The ABCIMA [...]<img alt="" border="0" src="http://stats.wordpress.com/b.gif?host=bayesspect.wordpress.com&amp;blog=4090232&amp;post=121&amp;subd=bayesspect&amp;ref=&amp;feed=1" width="1" height="1" />]]></description>
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			<media:title type="html">J. Q. McClintic</media:title>
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		<title>Starting To Run Examples</title>
		<link>http://bayesspect.wordpress.com/2010/05/09/starting-to-run-examples/</link>
		<comments>http://bayesspect.wordpress.com/2010/05/09/starting-to-run-examples/#comments</comments>
		<pubDate>Sun, 09 May 2010 08:32:33 +0000</pubDate>
		<dc:creator>J. Q. McClintic</dc:creator>
				<category><![CDATA[Software]]></category>
		<category><![CDATA[Writing]]></category>
		<category><![CDATA[abcima]]></category>
		<category><![CDATA[backward coupling]]></category>
		<category><![CDATA[bcima]]></category>
		<category><![CDATA[challenges]]></category>
		<category><![CDATA[efficiency]]></category>
		<category><![CDATA[ima]]></category>
		<category><![CDATA[progress]]></category>
		<category><![CDATA[spect]]></category>
		<category><![CDATA[testing]]></category>
		<category><![CDATA[transition]]></category>

		<guid isPermaLink="false">http://bayesspect.wordpress.com/?p=119</guid>
		<description><![CDATA[I am starting to run the examples that will be used in a paper my advisor and I will be submitting to a European mathematics journal. There are four of them, all using a centered standard normal prior and a standard normal candidate distribution (for better comparison across estimation techniques). I ran the IMA analyses [...]<img alt="" border="0" src="http://stats.wordpress.com/b.gif?host=bayesspect.wordpress.com&amp;blog=4090232&amp;post=119&amp;subd=bayesspect&amp;ref=&amp;feed=1" width="1" height="1" />]]></description>
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			<media:title type="html">J. Q. McClintic</media:title>
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		<title>My Slow Eee PC</title>
		<link>http://bayesspect.wordpress.com/2010/05/08/my-slow-eee-pc/</link>
		<comments>http://bayesspect.wordpress.com/2010/05/08/my-slow-eee-pc/#comments</comments>
		<pubDate>Sat, 08 May 2010 07:48:49 +0000</pubDate>
		<dc:creator>J. Q. McClintic</dc:creator>
				<category><![CDATA[Progress]]></category>
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		<guid isPermaLink="false">http://bayesspect.wordpress.com/?p=115</guid>
		<description><![CDATA[It turns out with a couple of small tweaks everything works great on my Eee PC. It also turns out that programming on an EeePC enforces a very high level of efficiency in algorithms because while the software runs, it runs SLOWLY. So the reality is when I have access to my other machine I&#8217;ll [...]<img alt="" border="0" src="http://stats.wordpress.com/b.gif?host=bayesspect.wordpress.com&amp;blog=4090232&amp;post=115&amp;subd=bayesspect&amp;ref=&amp;feed=1" width="1" height="1" />]]></description>
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