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	<title>Parâmetro de densidade Ω</title>
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	<link>http://alanfr.wordpress.com</link>
	<description>Física, Música, Poesia, Astronomia, Computação, Devaneios ...</description>
	<lastBuildDate>Fri, 13 May 2011 11:53:36 +0000</lastBuildDate>
	<language>pt-br</language>
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		<title>Parâmetro de densidade Ω</title>
		<link>http://alanfr.wordpress.com</link>
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		<item>
		<title>Restaurando painéis do GNOME</title>
		<link>http://alanfr.wordpress.com/2011/05/13/restaurando-paineis-do-gnome/</link>
		<comments>http://alanfr.wordpress.com/2011/05/13/restaurando-paineis-do-gnome/#comments</comments>
		<pubDate>Fri, 13 May 2011 11:53:35 +0000</pubDate>
		<dc:creator>Alan</dc:creator>
				<category><![CDATA[Computação]]></category>

		<guid isPermaLink="false">http://alanfr.wordpress.com/?p=185</guid>
		<description><![CDATA[No terminal digite: gconftool-2 --shutdown rm -rf ~/.gconf/apps/panel pkill gnome-panel pronto! XD<img alt="" border="0" src="http://stats.wordpress.com/b.gif?host=alanfr.wordpress.com&amp;blog=5267280&amp;post=185&amp;subd=alanfr&amp;ref=&amp;feed=1" width="1" height="1" />]]></description>
			<content:encoded><![CDATA[<p>No terminal digite:</p>
<p><code>gconftool-2 --shutdown<br />
rm -rf ~/.gconf/apps/panel<br />
pkill gnome-panel</code></p>
<p>pronto! XD</p>
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			<media:title type="html">alanfr</media:title>
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		<title>Reinstalando pacotes facilmente no Debian e Ubuntu</title>
		<link>http://alanfr.wordpress.com/2010/05/15/reinstalando-pacotes-facilmente-no-debian-e-ubuntu/</link>
		<comments>http://alanfr.wordpress.com/2010/05/15/reinstalando-pacotes-facilmente-no-debian-e-ubuntu/#comments</comments>
		<pubDate>Sat, 15 May 2010 20:39:37 +0000</pubDate>
		<dc:creator>Alan</dc:creator>
				<category><![CDATA[Computação]]></category>

		<guid isPermaLink="false">http://alanfr.wordpress.com/?p=179</guid>
		<description><![CDATA[Um dia desses me deu a louca e eu quis reinstalar meu Debian do zero( já haviam uns dois anos que isso não acontecia :p ). Minha primeira duvida foi: Como vou reistalar todos os meus preciosos pacotes (vários do latex, python, opengl, mpi &#8230;) ? Como sempre acontece em ambientes linux a solução foi [...]<img alt="" border="0" src="http://stats.wordpress.com/b.gif?host=alanfr.wordpress.com&amp;blog=5267280&amp;post=179&amp;subd=alanfr&amp;ref=&amp;feed=1" width="1" height="1" />]]></description>
			<content:encoded><![CDATA[<p>Um dia desses me deu a louca e eu quis reinstalar meu Debian do zero( já haviam uns dois anos que isso não acontecia :p ). Minha primeira duvida foi: Como vou reistalar todos os meus preciosos pacotes (vários do latex, python, opengl, mpi &#8230;) ? Como sempre acontece em ambientes linux a solução foi fácil e rápida.</p>
<p><code>Na máquina com os meus programas eu executei:</code></p>
<p><code>dpkg --get-selections &gt; my_preciousss.pkg</code></p>
<p><code>Na máquina nova:</code></p>
<p><code>dpkg --set-selections &lt; </code><code>my_preciousss.pkgs</code></p>
<p><code>apt-get dselect-upgrade                              # instala tudo perfeitamente <img src='http://s0.wp.com/wp-includes/images/smilies/icon_biggrin.gif' alt=':D' class='wp-smiley' /> </code></p>
<p> <img src='http://s1.wp.com/wp-includes/images/smilies/icon_wink.gif' alt=';)' class='wp-smiley' /> </p>
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			<media:title type="html">alanfr</media:title>
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		<item>
		<title>Números Randômicos</title>
		<link>http://alanfr.wordpress.com/2010/04/18/numeros-randomicos/</link>
		<comments>http://alanfr.wordpress.com/2010/04/18/numeros-randomicos/#comments</comments>
		<pubDate>Sun, 18 Apr 2010 00:32:09 +0000</pubDate>
		<dc:creator>Alan</dc:creator>
				<category><![CDATA[Computação]]></category>

		<guid isPermaLink="false">http://alanfr.wordpress.com/?p=176</guid>
		<description><![CDATA[Sabe quando precisamos gerar um número randômico e parece que o dado é viciado? Parece que o compilador substitui o nosso gerador por este. xkcd<img alt="" border="0" src="http://stats.wordpress.com/b.gif?host=alanfr.wordpress.com&amp;blog=5267280&amp;post=176&amp;subd=alanfr&amp;ref=&amp;feed=1" width="1" height="1" />]]></description>
			<content:encoded><![CDATA[<p>Sabe quando precisamos gerar um número randômico e parece que o dado é viciado? Parece que o compilador substitui o nosso gerador por este.</p>
<p><a href="http://xkcd.com/221/"><img class="aligncenter size-full wp-image-177" title="random_number" src="http://alanfr.files.wordpress.com/2010/04/random_number.png?w=640" alt=""   />xkcd</a></p>
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		<media:content url="" medium="image">
			<media:title type="html">alanfr</media:title>
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			<media:title type="html">random_number</media:title>
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		<item>
		<title>Métodos Numéricos</title>
		<link>http://alanfr.wordpress.com/2010/04/04/metodos-numericos/</link>
		<comments>http://alanfr.wordpress.com/2010/04/04/metodos-numericos/#comments</comments>
		<pubDate>Sun, 04 Apr 2010 18:50:55 +0000</pubDate>
		<dc:creator>Alan</dc:creator>
				<category><![CDATA[Computação]]></category>

		<guid isPermaLink="false">http://alanfr.wordpress.com/?p=171</guid>
		<description><![CDATA[Algumas (na verdade, muitas) vezes  precisamos relembrar alguns métodos para a resolução de EDO&#8217;s, das quais quase sempre não conseguimos resolver analíticamente. A Holistic Numerical Methods Institute, localizada na Universidade do Sul da Flórida, possui um site nos moldes do MIT Open Course Ware e oferece diversas vídeo-aulas sobre métodos numéricos.  Cada aula possui em média [...]<img alt="" border="0" src="http://stats.wordpress.com/b.gif?host=alanfr.wordpress.com&amp;blog=5267280&amp;post=171&amp;subd=alanfr&amp;ref=&amp;feed=1" width="1" height="1" />]]></description>
			<content:encoded><![CDATA[<p>Algumas (na verdade, muitas) vezes  precisamos relembrar alguns métodos para a resolução de <a href="http://pt.wikipedia.org/wiki/Equa%C3%A7%C3%A3o_diferencial" target="_blank">EDO&#8217;s</a>, das quais quase sempre não conseguimos resolver analíticamente. A <a href="http://numericalmethods.eng.usf.edu/">Holistic Numerical Methods Institute</a>, localizada na <a href="http://www.usf.edu/">Universidade do Sul da Flórida</a>, possui um site nos moldes do <a href="http://alanfr.wordpress.com/2010/02/17/58/">MIT Open Course Ware</a> e oferece diversas vídeo-aulas sobre métodos numéricos.  Cada aula possui em média 10 minutos e são muito bem explicadas, facilitando bastante a compreensão<a title="Permanent Link to MIT Open Course Ware" rel="bookmark" href="http://alanfr.wordpress.com/2010/02/17/58/">.</a></p>
<p><a href="http://numericalmethods.eng.usf.edu/">Holistic Numerical Methods Institute</a></p>
<p>[]&#8216;s</p>
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			<media:title type="html">alanfr</media:title>
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		<title>Contrail</title>
		<link>http://alanfr.wordpress.com/2010/03/22/contrail/</link>
		<comments>http://alanfr.wordpress.com/2010/03/22/contrail/#comments</comments>
		<pubDate>Mon, 22 Mar 2010 02:10:32 +0000</pubDate>
		<dc:creator>Alan</dc:creator>
				<category><![CDATA[Física]]></category>

		<guid isPermaLink="false">http://alanfr.wordpress.com/?p=167</guid>
		<description><![CDATA[Sabe quando às vezes agente olha para o céu e vê um avião passar deixando um rastro branco? Essas linhas de condensação deixadas pelos aviões são chamadas de &#8220;contrails&#8221; (Condesation Trail). Essas trilhas de vapor de água formam-se quando o ar quente e úmido que sai das turbinas do avião mistura-se com o ar em [...]<img alt="" border="0" src="http://stats.wordpress.com/b.gif?host=alanfr.wordpress.com&amp;blog=5267280&amp;post=167&amp;subd=alanfr&amp;ref=&amp;feed=1" width="1" height="1" />]]></description>
			<content:encoded><![CDATA[<p><a href="http://alanfr.files.wordpress.com/2010/03/contrail607.jpg"><img class="aligncenter size-full wp-image-168" title="contrail607" src="http://alanfr.files.wordpress.com/2010/03/contrail607.jpg?w=640" alt=""   /></a></p>
<p>Sabe quando às vezes agente olha para o céu e vê um avião passar deixando um rastro branco? Essas linhas de condensação deixadas pelos aviões são chamadas de &#8220;contrails&#8221; (<strong>Con</strong>desation <strong>Trail</strong>). Essas trilhas de vapor de água formam-se quando o ar quente e úmido que sai das turbinas do avião mistura-se com o ar em baixa pressão e temperatura existente na atmosfera. Essa &#8220;fumaça&#8221; é bem parecida com a que produzimos quando respiramos de boca aberta nos dias frios.  A figura abaixo mostra como a pressão de saturação do vapor varia em função da temperatura.</p>
<p><a href="http://alanfr.files.wordpress.com/2010/03/satvap.gif"><img class="aligncenter size-full wp-image-169" title="satvap" src="http://alanfr.files.wordpress.com/2010/03/satvap.gif?w=640" alt=""   /></a></p>
<p>A linha azul é a pressão de saturação de vapor para o gelo como função da temperatura (Kelvin). As regiões A e B referem-se a parcelas de ar não saturado. Imagine que o avião faz a exaustão na região B, conforme esse vapor mistura-se com a atmosfera da região A ela condensa-se, fomando uma nuvem e depois é dissipada. Pode-se ver também que existe uma condição de pressão e temperatura propícias a formação de nuvens. As &#8220;contrails&#8221; são uma alternativa mais econômica para a medição da velocidade do vento nessas alturas. Ao invés de enviar aviões para essa região da atmosfera, mede-se a velocidade do vento a partir da velocidade de deslocamento dessas nuvens.</p>
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		<media:content url="" medium="image">
			<media:title type="html">alanfr</media:title>
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			<media:title type="html">contrail607</media:title>
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		<title>A grande máquina escolar</title>
		<link>http://alanfr.wordpress.com/2010/03/19/a-grande-maquina-escolar/</link>
		<comments>http://alanfr.wordpress.com/2010/03/19/a-grande-maquina-escolar/#comments</comments>
		<pubDate>Fri, 19 Mar 2010 18:50:42 +0000</pubDate>
		<dc:creator>Alan</dc:creator>
				<category><![CDATA[Devaneios]]></category>

		<guid isPermaLink="false">http://alanfr.wordpress.com/?p=160</guid>
		<description><![CDATA[Infelizmente em nosso país existe um modelo padrão de ensino-aprendizagem, copiado de outros países e que trata o aluno como um animal que deve ser adestrado. O ser humano deve seguir uma norma &#8220;padrão&#8221; e os que não se adaptam, simplesmente são excluídos automaticamente do sistema. Será que essa ainda é uma forma correta de [...]<img alt="" border="0" src="http://stats.wordpress.com/b.gif?host=alanfr.wordpress.com&amp;blog=5267280&amp;post=160&amp;subd=alanfr&amp;ref=&amp;feed=1" width="1" height="1" />]]></description>
			<content:encoded><![CDATA[<p>Infelizmente em nosso país existe um modelo padrão de ensino-aprendizagem, copiado de outros países e que trata o aluno como um animal que deve ser adestrado. O ser humano deve seguir uma norma &#8220;padrão&#8221; e os que não se adaptam, simplesmente são excluídos automaticamente do sistema.</p>
<p><a href="http://alanfr.files.wordpress.com/2010/03/a_grande_maquina_escolar.jpg"><img class="aligncenter size-full wp-image-161" title="a_grande_máquina_escolar" src="http://alanfr.files.wordpress.com/2010/03/a_grande_maquina_escolar.jpg?w=640&#038;h=493" alt="" width="640" height="493" /></a></p>
<p>Será que essa ainda é uma forma correta de educar?</p>
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		<title>Alice no país das maravilhas.</title>
		<link>http://alanfr.wordpress.com/2010/02/20/alice-no-pais-das-maravilhas/</link>
		<comments>http://alanfr.wordpress.com/2010/02/20/alice-no-pais-das-maravilhas/#comments</comments>
		<pubDate>Sat, 20 Feb 2010 21:16:08 +0000</pubDate>
		<dc:creator>Alan</dc:creator>
				<category><![CDATA[Cinema]]></category>

		<guid isPermaLink="false">http://alanfr.wordpress.com/?p=126</guid>
		<description><![CDATA[Mais uma vez Tim Burton está vindo com outro excelente filme, um clássico dos estúdios Disney com sua ótica sombria. O visual dos personagens está muito legal, seguindo a linha tradicional de Terror fantástico. Autor de vários filmes ótimos, dos quais posso destacar os que mais gostei. A Noiva-Cadáver (2005) A Fantástica Fábrica de Chocolate [...]<img alt="" border="0" src="http://stats.wordpress.com/b.gif?host=alanfr.wordpress.com&amp;blog=5267280&amp;post=126&amp;subd=alanfr&amp;ref=&amp;feed=1" width="1" height="1" />]]></description>
			<content:encoded><![CDATA[<p><a href="http://alanfr.files.wordpress.com/2010/02/wonder_1.jpg"><img class="aligncenter size-full wp-image-127" title="wonder_1" src="http://alanfr.files.wordpress.com/2010/02/wonder_1.jpg?w=640" alt=""   /></a></p>
<p>Mais uma vez <a href="http://pt.wikipedia.org/wiki/Tim_Burton">Tim Burton</a> está vindo com outro excelente filme, um clássico dos estúdios Disney com sua ótica sombria.</p>
<p><a href="http://alanfr.files.wordpress.com/2010/02/alice_no_pais_das_maravilhas3-1.jpg"><img class="alignleft size-full wp-image-133" title="alice_no_pais_das_maravilhas3-1" src="http://alanfr.files.wordpress.com/2010/02/alice_no_pais_das_maravilhas3-1.jpg?w=640" alt=""   /></a> O visual dos personagens está muito legal, seguindo a linha tradicional de Terror fantástico.</p>
<p>Autor de vários filmes ótimos, dos quais posso destacar os que mais gostei.</p>
<p><em>A Noiva-Cadáver (2005)</em></p>
<p><em>A Fantástica Fábrica de Chocolate (2005)<br />
</em></p>
<p><em>Peixe Grande e Suas Histórias Maravilhosas (2003)</em></p>
<p><em>Marte Ataca! (1996)</em></p>
<p><em>O Estranho Mundo de Jack (1993)</em></p>
<p><em>Batman o Retorno (1992) e Batman (1989)<br />
</em></p>
<p><em>Edward Mãos-de-Tesoura (1990)</em></p>
<p><em>Os Fantasmas Se Divertem (1988)</em></p>
<p><em>Vincent (1982)<br />
</em></p>
<p><em><br />
</em></p>
<p><a href="http://alanfr.files.wordpress.com/2010/02/alice-no-pais-das-maravilhas-1.jpg"><img class="alignright size-full wp-image-129" title="alice-no-pais-das-maravilhas-1" src="http://alanfr.files.wordpress.com/2010/02/alice-no-pais-das-maravilhas-1.jpg?w=640" alt=""   /></a></p>
<p><em>Nunca vi uma versão de Alice em que eu sentisse que toda a obra original foi traduzida na tela. É uma série de aventuras esquisitas, e tentar fazê-las funcionar como filme será interessante&#8221;</em>, disse Burton ao <em>Sci-Fi Wire</em>. <em>&#8220;As histórias [de Alice] são como drogas para menores, sabe?&#8221;</em></p>
<p>Alice no País das Maravilhas vem sendo anunciado como um filme 3D, mas existe a expectativa de que o 3D somente apareça quando Alice entrar no País das Maravilhas.</p>
<p><em><a href="http://alanfr.files.wordpress.com/2010/02/confira_novas_imagens_de_alice_no_pais_das_maravilhas_blog2.jpg"><img class="alignleft size-full wp-image-140" title="confira_novas_imagens_de_alice_no_pais_das_maravilhas_blog2" src="http://alanfr.files.wordpress.com/2010/02/confira_novas_imagens_de_alice_no_pais_das_maravilhas_blog2.jpg?w=640" alt=""   /></a></em><em> </em></p>
<p>Este filme deve empregar a mesma técnica que foi utilizada em Beowulf<em> e Avatar,</em> como os recursos<a href="http://pt.wikipedia.org/wiki/Filme_em_live-action/anima%C3%A7%C3%A3o"> live action.</a></p>
<p>O filme será uma espécie de sequência do original. Alice, agora aos 19 anos, está em uma festa da nobreza em Oxford, onde vive, até que descobre que está prestes a ser pedida em casamento. Desesperada, ela foge seguindo um coelho branco, e vai parar no País das Maravilhas, um local que ela visitou há dez anos mas não se lembrava mais.</p>
<p>O lançamento nos EUA está previsto para 5 de março de 2010</p>
<p style="text-align:center;"><a href="http://alanfr.files.wordpress.com/2010/02/confira_novas_imagens_de_alice_no_pais_das_maravilhas_blog3.jpg"><img class="size-full wp-image-144 aligncenter" title="confira_novas_imagens_de_alice_no_pais_das_maravilhas_blog3" src="http://alanfr.files.wordpress.com/2010/02/confira_novas_imagens_de_alice_no_pais_das_maravilhas_blog3.jpg?w=640" alt=""   /></a></p>
<p style="text-align:left;">
<p style="text-align:left;">Trailers</p>
<p style="text-align:left;"><span style="text-align:center; display: block;"><a href="http://alanfr.wordpress.com/2010/02/20/alice-no-pais-das-maravilhas/"><img src="http://img.youtube.com/vi/oy02NI3K44Q/2.jpg" alt="" /></a></span></p>
<p style="text-align:left;"><span style="text-align:center; display: block;"><a href="http://alanfr.wordpress.com/2010/02/20/alice-no-pais-das-maravilhas/"><img src="http://img.youtube.com/vi/LjMkNrX60mA/2.jpg" alt="" /></a></span></p>
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		<title>Físicos &#8230; XD</title>
		<link>http://alanfr.wordpress.com/2010/02/20/fisicos-xd/</link>
		<comments>http://alanfr.wordpress.com/2010/02/20/fisicos-xd/#comments</comments>
		<pubDate>Sat, 20 Feb 2010 16:30:08 +0000</pubDate>
		<dc:creator>Alan</dc:creator>
				<category><![CDATA[Devaneios]]></category>

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		<title>Relativizando &#8230;</title>
		<link>http://alanfr.wordpress.com/2010/02/20/relativizando/</link>
		<comments>http://alanfr.wordpress.com/2010/02/20/relativizando/#comments</comments>
		<pubDate>Sat, 20 Feb 2010 00:42:28 +0000</pubDate>
		<dc:creator>Alan</dc:creator>
				<category><![CDATA[Física]]></category>

		<guid isPermaLink="false">http://alanfr.wordpress.com/?p=44</guid>
		<description><![CDATA[Em 1916, Einstein escreveu um artigo bem simples e fácil de seguir com uma explicação sobre a teoria da relatividade, orientada para o não-cientista, que agora está disponível em uma versão online. Relativity The Special and General Theory<img alt="" border="0" src="http://stats.wordpress.com/b.gif?host=alanfr.wordpress.com&amp;blog=5267280&amp;post=44&amp;subd=alanfr&amp;ref=&amp;feed=1" width="1" height="1" />]]></description>
			<content:encoded><![CDATA[<p><a href="http://alanfr.files.wordpress.com/2010/02/albert_einstein_head.jpg"><img class="alignleft size-medium wp-image-46" title="Albert_Einstein_Head" src="http://alanfr.files.wordpress.com/2010/02/albert_einstein_head.jpg?w=230&#038;h=300" alt="" width="230" height="300" /></a> Em 1916, Einstein escreveu um artigo bem simples e fácil de seguir com uma explicação sobre a teoria da relatividade, orientada para o não-cientista, que agora está disponível em uma versão online.</p>
<p><a href="http://www.bartleby.com/173/">Relativity<br />
The Special and General Theory</a></p>
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		<title>Cluster com Torque/MAUI no Debian</title>
		<link>http://alanfr.wordpress.com/2010/02/20/cluster-com-debian-torque-e-maui/</link>
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		<pubDate>Sat, 20 Feb 2010 00:29:09 +0000</pubDate>
		<dc:creator>Alan</dc:creator>
				<category><![CDATA[Computação]]></category>

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		<description><![CDATA[Documentação do Cluster em Debian para a execução de programas. http://operador.if.uff.br/cluster/doku.php<img alt="" border="0" src="http://stats.wordpress.com/b.gif?host=alanfr.wordpress.com&amp;blog=5267280&amp;post=38&amp;subd=alanfr&amp;ref=&amp;feed=1" width="1" height="1" />]]></description>
			<content:encoded><![CDATA[<p>Documentação do Cluster em Debian para a execução de programas.</p>
<p><a href="http://operador.if.uff.br/cluster/doku.php" target="_blank">http://operador.if.uff.br/cluster/doku.php</a></p>
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