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	<title>extellireader</title>
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	<link>http://extellireader.wordpress.com</link>
	<description>Random thoughts on brains, computation, imaging, and art.</description>
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		<title>extellireader</title>
		<link>http://extellireader.wordpress.com</link>
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		<item>
		<title>Roping the Earth</title>
		<link>http://extellireader.wordpress.com/2009/03/03/rope_around_earth/</link>
		<comments>http://extellireader.wordpress.com/2009/03/03/rope_around_earth/#comments</comments>
		<pubDate>Tue, 03 Mar 2009 21:56:26 +0000</pubDate>
		<dc:creator>Dimitri</dc:creator>
				<category><![CDATA[fun math]]></category>
		<category><![CDATA[Christoph Schiller]]></category>
		<category><![CDATA[Motion Mountain]]></category>

		<guid isPermaLink="false">http://extellireader.wordpress.com/?p=336</guid>
		<description><![CDATA[I have utterly enjoyed the very stimulating online physics book by Christoph Schiller Motion Mountain. It includes some 1700 challenges for the reader ranging from fun little puzzles to standing research problems. This is a great example of how textbooks should be written to engage the student. Here is Challenge 70 from the book. A [...]<img alt="" border="0" src="http://stats.wordpress.com/b.gif?host=extellireader.wordpress.com&amp;blog=5153320&amp;post=336&amp;subd=extellireader&amp;ref=&amp;feed=1" width="1" height="1" />]]></description>
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		<slash:comments>3</slash:comments>
	
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			<media:title type="html">Dimitri</media:title>
		</media:content>

		<media:content url="http://extellireader.files.wordpress.com/2009/03/earthrope.png" medium="image">
			<media:title type="html">A rope around the earth</media:title>
		</media:content>

		<media:content url="http://extellireader.files.wordpress.com/2009/03/calc1.png?w=239" medium="image">
			<media:title type="html">calc1</media:title>
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	</item>
		<item>
		<title>Aliasing in biological vision</title>
		<link>http://extellireader.wordpress.com/2009/03/03/aliasing-in-sensory-and-neurobiological-systems/</link>
		<comments>http://extellireader.wordpress.com/2009/03/03/aliasing-in-sensory-and-neurobiological-systems/#comments</comments>
		<pubDate>Tue, 03 Mar 2009 18:01:20 +0000</pubDate>
		<dc:creator>Dimitri</dc:creator>
				<category><![CDATA[Brain and mind]]></category>
		<category><![CDATA[Moire and shadow art]]></category>
		<category><![CDATA[aliasing]]></category>
		<category><![CDATA[illusion]]></category>
		<category><![CDATA[illusory motion reversal]]></category>
		<category><![CDATA[moire]]></category>
		<category><![CDATA[motion perception]]></category>

		<guid isPermaLink="false">http://extellireader.wordpress.com/?p=329</guid>
		<description><![CDATA[Moir&#233; artifacts and other forms of aliasing often appear in electronic imaging systems due to insufficient sampling of the optical images. Spatial aliasing occurs when the optical image bandwidth exceeds that of the image detector. Spatial aliasing manifests itself when a TV host wears a fine-striped shirt, producing distracting moir&#233;s. Temporal aliasing occurs when the [...]<img alt="" border="0" src="http://stats.wordpress.com/b.gif?host=extellireader.wordpress.com&amp;blog=5153320&amp;post=329&amp;subd=extellireader&amp;ref=&amp;feed=1" width="1" height="1" />]]></description>
		<wfw:commentRss>http://extellireader.wordpress.com/2009/03/03/aliasing-in-sensory-and-neurobiological-systems/feed/</wfw:commentRss>
		<slash:comments>1</slash:comments>
	
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			<media:title type="html">Dimitri</media:title>
		</media:content>

		<media:content url="http://artmoire.files.wordpress.com/2009/03/georgemoire.jpg" medium="image">
			<media:title type="html">George&#039;s moires</media:title>
		</media:content>

		<media:content url="http://artmoire.files.wordpress.com/2009/03/wheel.gif" medium="image">
			<media:title type="html">wheel</media:title>
		</media:content>
	</item>
		<item>
		<title>Constructing a daemon to keep your cool</title>
		<link>http://extellireader.wordpress.com/2009/02/11/keeping-our-daemon/</link>
		<comments>http://extellireader.wordpress.com/2009/02/11/keeping-our-daemon/#comments</comments>
		<pubDate>Wed, 11 Feb 2009 07:33:29 +0000</pubDate>
		<dc:creator>Dimitri</dc:creator>
				<category><![CDATA[Brain and mind]]></category>
		<category><![CDATA[motivation]]></category>

		<guid isPermaLink="false">http://extellireader.wordpress.com/?p=310</guid>
		<description><![CDATA[Elizabeth Gilbert&#8217;s TED talk fell on grateful ears. Creative persons, she reasoned, inevitably face heightened risks of mental disorders and personal destruction as their psyche struggles to absorb successes and to pull through rejections and failures. Paralyzing self-doubt, fear of mediocrity, and destructive manias gain their potency from the modern rational belief that creativity comes [...]<img alt="" border="0" src="http://stats.wordpress.com/b.gif?host=extellireader.wordpress.com&amp;blog=5153320&amp;post=310&amp;subd=extellireader&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">Dimitri</media:title>
		</media:content>
	</item>
		<item>
		<title>Human brains as bowls of spaghetti (with meatballs)</title>
		<link>http://extellireader.wordpress.com/2009/01/28/human-brain-as-a-bowl-of-spaghetti-with-meatballs/</link>
		<comments>http://extellireader.wordpress.com/2009/01/28/human-brain-as-a-bowl-of-spaghetti-with-meatballs/#comments</comments>
		<pubDate>Thu, 29 Jan 2009 01:59:51 +0000</pubDate>
		<dc:creator>Dimitri</dc:creator>
				<category><![CDATA[Brain and mind]]></category>
		<category><![CDATA[tongue-in-cheek]]></category>
		<category><![CDATA[flying spaghetti monster]]></category>
		<category><![CDATA[Jeff Hawkins]]></category>
		<category><![CDATA[Pastfarianism]]></category>

		<guid isPermaLink="false">http://extellireader.wordpress.com/?p=284</guid>
		<description><![CDATA[In &#8220;On Intelligence&#8221;, Jeff Hawkins makes an apt metaphor for the complexity of the brain: The brain is incredibly complex, a vast and daunting tangle of cells. At first glance it looks like a stadium full of cooked spaghetti. Let&#8217;s explore this comparison. Do the proportions hold? Incredibly, they do! Take a human brain 20 [...]<img alt="" border="0" src="http://stats.wordpress.com/b.gif?host=extellireader.wordpress.com&amp;blog=5153320&amp;post=284&amp;subd=extellireader&amp;ref=&amp;feed=1" width="1" height="1" />]]></description>
		<wfw:commentRss>http://extellireader.wordpress.com/2009/01/28/human-brain-as-a-bowl-of-spaghetti-with-meatballs/feed/</wfw:commentRss>
		<slash:comments>0</slash:comments>
	
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			<media:title type="html">Dimitri</media:title>
		</media:content>

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			<media:title type="html">neurons</media:title>
		</media:content>

		<media:content url="http://extellireader.files.wordpress.com/2009/01/fsm21.png" medium="image">
			<media:title type="html">Flying Spaghetti Monster</media:title>
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	</item>
		<item>
		<title>Do animals have souls?</title>
		<link>http://extellireader.wordpress.com/2009/01/25/do-animals-have-souls/</link>
		<comments>http://extellireader.wordpress.com/2009/01/25/do-animals-have-souls/#comments</comments>
		<pubDate>Sun, 25 Jan 2009 22:29:30 +0000</pubDate>
		<dc:creator>Dimitri</dc:creator>
				<category><![CDATA[Brain and mind]]></category>
		<category><![CDATA[tongue-in-cheek]]></category>
		<category><![CDATA[Cartesian dualism]]></category>
		<category><![CDATA[Catholic]]></category>
		<category><![CDATA[conservapedia]]></category>
		<category><![CDATA[Mormon]]></category>
		<category><![CDATA[pineal gland]]></category>
		<category><![CDATA[soul]]></category>

		<guid isPermaLink="false">http://extellireader.wordpress.com/?p=268</guid>
		<description><![CDATA[A while ago, I asked several coworkers, separately, whether they thought animals had souls. The two Mormons among them claimed that all living things all the way to prokaryotes and viruses had eternal spirits along with their physical bodies. The two Catholics argued that humans alone possessed minds and souls. All of them seemed somewhat [...]<img alt="" border="0" src="http://stats.wordpress.com/b.gif?host=extellireader.wordpress.com&amp;blog=5153320&amp;post=268&amp;subd=extellireader&amp;ref=&amp;feed=1" width="1" height="1" />]]></description>
		<wfw:commentRss>http://extellireader.wordpress.com/2009/01/25/do-animals-have-souls/feed/</wfw:commentRss>
		<slash:comments>5</slash:comments>
	
		<media:content url="http://0.gravatar.com/avatar/431f07cfda17add68e50814d50871165?s=96&#38;d=identicon&#38;r=G" medium="image">
			<media:title type="html">Dimitri</media:title>
		</media:content>
	</item>
		<item>
		<title>&#8220;On Intelligence&#8221; by Jeff Hawkins</title>
		<link>http://extellireader.wordpress.com/2009/01/12/on-intelligence-by-jeff-hawkins/</link>
		<comments>http://extellireader.wordpress.com/2009/01/12/on-intelligence-by-jeff-hawkins/#comments</comments>
		<pubDate>Mon, 12 Jan 2009 09:59:44 +0000</pubDate>
		<dc:creator>Dimitri</dc:creator>
				<category><![CDATA[Book review]]></category>
		<category><![CDATA[Brain and mind]]></category>
		<category><![CDATA[computation]]></category>

		<guid isPermaLink="false">http://extellireader.wordpress.com/?p=241</guid>
		<description><![CDATA[&#8220;On Intelligence&#8221; fulfills Jeff Hawkins&#8216; dream to encapsulate a basic theory of intelligence in a straightforward plainly written book. Written with science writer Sandra Blakeslee, &#8220;On Intelligence&#8221; combines Mr Hawkins&#8217; motivational autobiography, a review of natural and artificial intelligence, and a philosophical discussion delivered in a no-nonsense, unembellished, yet stimulating narrative. At its core, &#8220;On [...]<img alt="" border="0" src="http://stats.wordpress.com/b.gif?host=extellireader.wordpress.com&amp;blog=5153320&amp;post=241&amp;subd=extellireader&amp;ref=&amp;feed=1" width="1" height="1" />]]></description>
		<wfw:commentRss>http://extellireader.wordpress.com/2009/01/12/on-intelligence-by-jeff-hawkins/feed/</wfw:commentRss>
		<slash:comments>2</slash:comments>
	
		<media:content url="http://0.gravatar.com/avatar/431f07cfda17add68e50814d50871165?s=96&#38;d=identicon&#38;r=G" medium="image">
			<media:title type="html">Dimitri</media:title>
		</media:content>

		<media:content url="http://extellireader.files.wordpress.com/2009/01/frontcover.png?w=197" medium="image">
			<media:title type="html">frontcover</media:title>
		</media:content>
	</item>
		<item>
		<title>dappled designs</title>
		<link>http://extellireader.wordpress.com/2008/08/10/dappled-designs/</link>
		<comments>http://extellireader.wordpress.com/2008/08/10/dappled-designs/#comments</comments>
		<pubDate>Sun, 10 Aug 2008 05:11:00 +0000</pubDate>
		<dc:creator>Dimitri</dc:creator>
				<category><![CDATA[Moire and shadow art]]></category>
		<category><![CDATA[sundials]]></category>
		<category><![CDATA[dappled light]]></category>
		<category><![CDATA[sculpture]]></category>

		<guid isPermaLink="false">http://extellireader.wordpress.com/2008/08/10/dappled-designs/</guid>
		<description><![CDATA[image courtesy Edward Tufte As sunlight passes through the crown of a tree, every small opening in the crown serves as the aperture of a pinhole camera that casts an image of the sun on the ground. These sun images vary in size and brightness and may overlap, forming shadows of intricate detail and rich [...]<img alt="" border="0" src="http://stats.wordpress.com/b.gif?host=extellireader.wordpress.com&amp;blog=5153320&amp;post=20&amp;subd=extellireader&amp;ref=&amp;feed=1" width="1" height="1" />]]></description>
		<wfw:commentRss>http://extellireader.wordpress.com/2008/08/10/dappled-designs/feed/</wfw:commentRss>
		<slash:comments>2</slash:comments>
	
		<media:content url="http://0.gravatar.com/avatar/431f07cfda17add68e50814d50871165?s=96&#38;d=identicon&#38;r=G" medium="image">
			<media:title type="html">Dimitri</media:title>
		</media:content>

		<media:content url="http://bp3.blogger.com/_g07H0wyt5BU/SD-9bg0QeWI/AAAAAAAAALo/qMgmfALTAYM/s320/dappled.jpg" medium="image" />
	</item>
		<item>
		<title>Wooden shadow mirror</title>
		<link>http://extellireader.wordpress.com/2008/08/10/wooden-shadow-mirror/</link>
		<comments>http://extellireader.wordpress.com/2008/08/10/wooden-shadow-mirror/#comments</comments>
		<pubDate>Sun, 10 Aug 2008 02:20:00 +0000</pubDate>
		<dc:creator>Dimitri</dc:creator>
				<category><![CDATA[Moire and shadow art]]></category>
		<category><![CDATA[Danny Rozin]]></category>
		<category><![CDATA[mirrors]]></category>
		<category><![CDATA[shadows]]></category>
		<category><![CDATA[video]]></category>

		<guid isPermaLink="false">http://extellireader.wordpress.com/2008/08/10/wooden-shadow-mirror/</guid>
		<description><![CDATA[The artist Danny Rozin has created &#8220;mirrors&#8221; that create shadow images of the viewer by actuating simple elements such as blocks or pegs.<img alt="" border="0" src="http://stats.wordpress.com/b.gif?host=extellireader.wordpress.com&amp;blog=5153320&amp;post=17&amp;subd=extellireader&amp;ref=&amp;feed=1" width="1" height="1" />]]></description>
		<wfw:commentRss>http://extellireader.wordpress.com/2008/08/10/wooden-shadow-mirror/feed/</wfw:commentRss>
		<slash:comments>0</slash:comments>
	
		<media:content url="http://0.gravatar.com/avatar/431f07cfda17add68e50814d50871165?s=96&#38;d=identicon&#38;r=G" medium="image">
			<media:title type="html">Dimitri</media:title>
		</media:content>
	</item>
		<item>
		<title>Popularizers of scientific consciousness</title>
		<link>http://extellireader.wordpress.com/2008/07/07/consciousness-authors-videos/</link>
		<comments>http://extellireader.wordpress.com/2008/07/07/consciousness-authors-videos/#comments</comments>
		<pubDate>Mon, 07 Jul 2008 03:24:00 +0000</pubDate>
		<dc:creator>Dimitri</dc:creator>
				<category><![CDATA[Book review]]></category>
		<category><![CDATA[Brain and mind]]></category>
		<category><![CDATA[Antonio Damasio]]></category>
		<category><![CDATA[Cartesian dualism]]></category>
		<category><![CDATA[Christof Koch]]></category>
		<category><![CDATA[consciousness]]></category>
		<category><![CDATA[Daniel Dennett]]></category>
		<category><![CDATA[Darwinism]]></category>
		<category><![CDATA[Douglas Hofstadter]]></category>
		<category><![CDATA[evolution]]></category>
		<category><![CDATA[Francis Crick]]></category>
		<category><![CDATA[Jeff Hawkins]]></category>
		<category><![CDATA[neuroscience]]></category>

		<guid isPermaLink="false">http://extellireader.wordpress.com/2008/07/07/consciousness-authors-videos/</guid>
		<description><![CDATA[Francis Crick was being coy when he titled his book &#8220;The astonishing hypothesis&#8221;: that all cognitive processes, including consciousness, are the product of neurons is much more than a hypothesis &#8212; it is a mature theory and a subject of active multidisciplinary investigation. The popularization of this insight may meet similar resistance as Darwin&#8217;s theory [...]<img alt="" border="0" src="http://stats.wordpress.com/b.gif?host=extellireader.wordpress.com&amp;blog=5153320&amp;post=56&amp;subd=extellireader&amp;ref=&amp;feed=1" width="1" height="1" />]]></description>
		<wfw:commentRss>http://extellireader.wordpress.com/2008/07/07/consciousness-authors-videos/feed/</wfw:commentRss>
		<slash:comments>0</slash:comments>
	
		<media:content url="http://0.gravatar.com/avatar/431f07cfda17add68e50814d50871165?s=96&#38;d=identicon&#38;r=G" medium="image">
			<media:title type="html">Dimitri</media:title>
		</media:content>

		<media:content url="http://extellireader.files.wordpress.com/2008/11/mindbooks.png?w=300" medium="image">
			<media:title type="html">mindbooks</media:title>
		</media:content>
	</item>
		<item>
		<title>Reflection on self-awareness</title>
		<link>http://extellireader.wordpress.com/2008/06/13/reflection-on-self-awareness/</link>
		<comments>http://extellireader.wordpress.com/2008/06/13/reflection-on-self-awareness/#comments</comments>
		<pubDate>Fri, 13 Jun 2008 02:38:00 +0000</pubDate>
		<dc:creator>Dimitri</dc:creator>
				<category><![CDATA[Brain and mind]]></category>
		<category><![CDATA[consciousness]]></category>
		<category><![CDATA[prank]]></category>
		<category><![CDATA[self-awareness]]></category>
		<category><![CDATA[video]]></category>

		<guid isPermaLink="false">http://extellireader.wordpress.com/2008/06/13/reflection-on-self-awareness/</guid>
		<description><![CDATA[Recognizing self in the mirror is an established test of self-awareness. Humans and the great apes are alone in the animal kingdom to pass it. We humans go a bit too far and insist on it, with embarrassing results: I wonder how a mirror-trained bonobo would respond to this prank. How about a six-year-old child?<img alt="" border="0" src="http://stats.wordpress.com/b.gif?host=extellireader.wordpress.com&amp;blog=5153320&amp;post=54&amp;subd=extellireader&amp;ref=&amp;feed=1" width="1" height="1" />]]></description>
		<wfw:commentRss>http://extellireader.wordpress.com/2008/06/13/reflection-on-self-awareness/feed/</wfw:commentRss>
		<slash:comments>0</slash:comments>
	
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			<media:title type="html">Dimitri</media:title>
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