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  <channel>
    <title>Sufficient and necessary conditions</title>
    <description>Nature Network blog posts from user 'Nicolau Werneck'</description>
    <link>http://network.nature.com/blogs/user/nwerneck</link>
    <language>en-us</language>
    <ttl>40</ttl>
    <item>
      <title>Music of the poliedra</title>
      <description>
        <![CDATA[<p>This is a letter I sent to Nature (rejected as usual, but I never lose hope!) regarding the article series on music and science, and then some further comments on the interview at the 02/07/08 nature podcast.</p>]]>
      </description>
      <pubDate>Thu, 03 Jul 2008 16:46:02 -0000</pubDate>
      <link>http://network.nature.com/blogs/user/nwerneck/2008/07/03/music-of-the-poliedra</link>
      <guid>http://network.nature.com/blogs/user/nwerneck/2008/07/03/music-of-the-poliedra</guid>
      <dc:creator>Nicolau Werneck</dc:creator>
    </item>
    <item>
      <title>Memristors, and the conductive capacitors in human memory units</title>
      <description>
        <![CDATA[<p>This is an attempt to explain  what the recent memristor research is all about, and a harsh criticism of what was broadcast around regarding the subject.</p>]]>
      </description>
      <pubDate>Wed, 07 May 2008 07:06:12 -0000</pubDate>
      <link>http://network.nature.com/blogs/user/nwerneck/2008/05/05/memristors-and-the-conductive-capacitors-in-human-memory-units</link>
      <guid>http://network.nature.com/blogs/user/nwerneck/2008/05/05/memristors-and-the-conductive-capacitors-in-human-memory-units</guid>
      <dc:creator>Nicolau Werneck</dc:creator>
    </item>
    <item>
      <title>Symbolions and perceptronic computing, pt. I</title>
      <description>
        <![CDATA[<p>People like to invent conflicts within science. I hate this. I am from a totally opposed movement that thinks things are just the opposite of what this other movement says&#8230;</p>


	<p>I believe most of the time these big disputes are mentioned, there is actually no dispute. Generally it&#8217;s just one group saying that there are two groups, and nobody actually fights for the other side. Also, it&#8217;s often a false dilemma. There is no real conflict, just orthogonal or unrelated choices.</p>


	<p>One such naïve dichotomic fight that people like to describe is the famous one between reductionism and holism, about which I wrote here once. There are three more others I&#8217;ve been dealing with recently: the <span class="caps">GOTO</span> and structure programming controversy (wrote about it too), the Perceptrons and neural networks controversy, and finally the probability controversy (classical vs frequencialism vs bayesian). I want to write about all of them, specially because in all cases I defend the view that the conflict is fictitious.</p>


	<p>The Perceptron is a very interesting entity that deserves the attention of all. The legend says that it was a great invention that were maliciously disregarded by Marvin Minsky, the merciless, who wanted to become the dominant alpha male of AI. This would have delayed scientific advance for decades. I will talk about how I find this concept ludicrous.</p>


	<p>This is part one of the article. (It is huge, sorry.)</p>]]>
      </description>
      <pubDate>Wed, 30 Apr 2008 04:21:42 -0000</pubDate>
      <link>http://network.nature.com/blogs/user/nwerneck/2008/04/15/symbolions-and-perceptronic-computing-pt-i</link>
      <guid>http://network.nature.com/blogs/user/nwerneck/2008/04/15/symbolions-and-perceptronic-computing-pt-i</guid>
      <dc:creator>Nicolau Werneck</dc:creator>
    </item>
    <item>
      <title>Irritalin</title>
      <description>
        <![CDATA[<p>Today Nature released the result of its pool about use of “cognitive enhancing” drugs. Although the magazine took the care to always say how it was not a serious research, the newspapers didn&#8217;t care to simply go on saying that 1/5 of “the scientists” (that mysterious entity, “the scientists”, who are always taking decisions and doing strange stuff that are reported indirectly in the papers) make use of such drugs.</p>


	<p>But let&#8217;s not care for the general media and try to return to a high-level debate, as the one that was started when the poll began. When reading the <a href="http://www.nature.com/news/2008/080409/full/452674a.html">new article at Nature</a>, with the poll results, I started to understand that we are mixing two subjects: that of <a href="http://en.wikipedia.org/wiki/Transhumanism">transhumanism</a>, related to other possible advances such as <a href="http://en.wikipedia.org/wiki/Brain_Machine_Interface">BMI</a>, and on the other side the discussion of the current use of drugs such methylphenidate (Ritalin).</p>


	<p>While I often support the idea of transhumanism, after reading that article I realized I am strongly opposed to the way people seem to be using Ritalin in the academic world, and consequently the way they are proposing that other such drugs should be used in the future. I&#8217;ll try to explain those concerns of mine below.</p>]]>
      </description>
      <pubDate>Sat, 12 Apr 2008 03:54:16 -0000</pubDate>
      <link>http://network.nature.com/blogs/user/nwerneck/2008/04/11/irritalin</link>
      <guid>http://network.nature.com/blogs/user/nwerneck/2008/04/11/irritalin</guid>
      <dc:creator>Nicolau Werneck</dc:creator>
    </item>
    <item>
      <title>The shape of intelligent things to come</title>
      <description>
        <![CDATA[<p>I am starting my doctoral studies, and my adviser keeps telling me decide my research topic. I already tried to tell her and other people what are my main concerns in contemporary research in my field, and what is the problem I would like to contribute to, but I haven´t succeeded in convincing anyone yet. I am writing this here to see if anyone can comment on my ideas, and help me explaining what I believe in.</p>


	<p>My field is computers, signal processing, AI and mobile robotics. For one side, I like neuronal networks and other said “connectionist” structures of computation and methods of learning. But I&#8217;m not a NN guy, I like complex computers, and complex programs and mechanisms. I like the shape of the computer structures that the so-called “symbolic paradigm” uses. But I don&#8217;t see the wall between the two areas, and I want to make a study to help bringing the two together. The way to do this is mainly studying the performance of different systems, and analyzing them &#8220;from the outside&#8221;, peeking at the computational structures a bit like a biologist and using tools like dynamical system analysis, and information theory.</p>]]>
      </description>
      <pubDate>Mon, 24 Mar 2008 10:47:40 -0000</pubDate>
      <link>http://network.nature.com/blogs/user/nwerneck/2008/03/24/the-shape-of-intelligent-things-to-come</link>
      <guid>http://network.nature.com/blogs/user/nwerneck/2008/03/24/the-shape-of-intelligent-things-to-come</guid>
      <dc:creator>Nicolau Werneck</dc:creator>
    </item>
    <item>
      <title>Q: Are we not man?</title>
      <description>
        <![CDATA[<p>A: We are devo.</p>]]>
      </description>
      <pubDate>Sat, 23 Feb 2008 05:42:30 -0000</pubDate>
      <link>http://network.nature.com/blogs/user/nwerneck/2008/02/23/q-are-we-not-man</link>
      <guid>http://network.nature.com/blogs/user/nwerneck/2008/02/23/q-are-we-not-man</guid>
      <dc:creator>Nicolau Werneck</dc:creator>
    </item>
    <item>
      <title>Late and sad NN anniversary post</title>
      <description>
        <![CDATA[<p>Happy anniversary, Nature Network!... And happy day of the Saint Valentine&#8217;s massacre!... (many hearts get pierced by arrows this day) Here is my contribution to the 14/02 collective blogging effort&#8230; But unfortunately I don&#8217;t believe it is quite the positive funny contribution you might expect&#8230;.....</p>]]>
      </description>
      <pubDate>Tue, 19 Feb 2008 00:57:22 -0000</pubDate>
      <link>http://network.nature.com/blogs/user/nwerneck/2008/02/15/late-and-sad-nn-anniversary-post</link>
      <guid>http://network.nature.com/blogs/user/nwerneck/2008/02/15/late-and-sad-nn-anniversary-post</guid>
      <dc:creator>Nicolau Werneck</dc:creator>
    </item>
    <item>
      <title>The Black Pearl Necklace</title>
      <description>
        <![CDATA[<p>This blog post is to report an interesting problem I&#8217;ve found while working with a school assignment. I&#8217;ve studied a number of <a href="http://www.lta.pcs.usp.br">Adaptive Finite Automata</a> , doing a research similar to what Wolfram did to binary unidimensional CAs in 1981.</p>]]>
      </description>
      <pubDate>Fri, 18 Jan 2008 00:27:34 -0000</pubDate>
      <link>http://network.nature.com/blogs/user/nwerneck/2008/01/18/the-black-pearl-necklace</link>
      <guid>http://network.nature.com/blogs/user/nwerneck/2008/01/18/the-black-pearl-necklace</guid>
      <dc:creator>Nicolau Werneck</dc:creator>
    </item>
    <item>
      <title>Morality through dumbness feedback</title>
      <description>
        <![CDATA[<p>Many people dislike the TV and Internet and other medias for giving powefull access to pornography to the population. But things are not so simple. While there are sources of free pornography much of the surface of &#8220;Internet&#8217;s underworld&#8221; is populated by con websites and fake ads luring people to their traps. There is also a lot of confusing information around, and tools such as Google and Wikipedia can&#8217;t help much in these cases. This ends up acting as a feedback mechanism preventing people to have easy access to pornography.</p>]]>
      </description>
      <pubDate>Tue, 15 Jan 2008 04:11:16 -0000</pubDate>
      <link>http://network.nature.com/blogs/user/nwerneck/2008/01/15/morality-through-dumbness-feedback</link>
      <guid>http://network.nature.com/blogs/user/nwerneck/2008/01/15/morality-through-dumbness-feedback</guid>
      <dc:creator>Nicolau Werneck</dc:creator>
    </item>
    <item>
      <title>GOTO Trauma and Algorithmic Rhetoric</title>
      <description>
        <![CDATA[<p>The late 60&#8217;s  saw the emergence of structured  programming, considered by some to  have  started with  Dijkstra&#8217;s  1968  letter  <a href="http://www.cs.utexas.edu/users/EWD/ewd02xx/EWD215.PDF">Go To  Statement  Considered Harmful</a>  .  Dijkstra was concerned about  the cognitive restrictions of humans when  reading programs. He was also interested in formal proofs, and the adaptability and manageability of programs. Today some people still discuss the subject of the use of <span class="caps">GOTO</span>, but I think we are missing the point, and a chance to really advance things from the point that Dijkstra left us.</p>]]>
      </description>
      <pubDate>Tue, 08 Jan 2008 16:38:08 -0000</pubDate>
      <link>http://network.nature.com/blogs/user/nwerneck/2008/01/08/goto-trauma-and-algorithmic-rhetoric</link>
      <guid>http://network.nature.com/blogs/user/nwerneck/2008/01/08/goto-trauma-and-algorithmic-rhetoric</guid>
      <dc:creator>Nicolau Werneck</dc:creator>
    </item>
    <item>
      <title>The Wiki-wiki Manifesto</title>
      <description>
        <![CDATA[<p>It has been a long time I&#8217;ve been hearing <a href="http://news.bbc.co.uk/1/hi/technology/7130325.stm">bad views about Wikipedia</a> , and how it would not compare to the said &#8220;classical&#8221; sources. The question of the appropriateness of quoting sources such as Wikipedia in scientific publications, and its use in academic activities in general ends up stimulating a much larger and important debate: that of the role of bibliographical references in scientific articles and activities.</p>]]>
      </description>
      <pubDate>Sat, 15 Dec 2007 18:52:25 -0000</pubDate>
      <link>http://network.nature.com/blogs/user/nwerneck/2007/12/15/the-wiki-wiki-manifesto</link>
      <guid>http://network.nature.com/blogs/user/nwerneck/2007/12/15/the-wiki-wiki-manifesto</guid>
      <dc:creator>Nicolau Werneck</dc:creator>
    </item>
    <item>
      <title>Watson Bergeron</title>
      <description>
        <![CDATA[<p>This is a text I&#8217;ve been writing ever since the Watson episode. I decided to  finally post it because it has been so much time already&#8230; It&#8217;s not very well written, and has many subjects&#8230; Certainly not a pearl from my blogs, but now I&#8217;m happy I can move on to think other things!...</p>


	<p>After Mr. Watson&#8217;s <a href="http://en.wikipedia.org/wiki/James_D._Watson#Opinion_claiming_links_between_race_and_intelligence">controversial interview</a> , many people were quick to deny anything he said, and call him a racist. I even confess I dismissed his sayings as senile stupidity. But then I read this interview with <a href="http://www1.folha.uol.com.br/folha/ciencia/ult306u342554.shtml">Charles Murray</a> and decided that people were in fact too harsh with Mr. James&#8230;</p>]]>
      </description>
      <pubDate>Thu, 13 Dec 2007 22:08:57 -0000</pubDate>
      <link>http://network.nature.com/blogs/user/nwerneck/2007/12/13/watson-bergeron</link>
      <guid>http://network.nature.com/blogs/user/nwerneck/2007/12/13/watson-bergeron</guid>
      <dc:creator>Nicolau Werneck</dc:creator>
    </item>
    <item>
      <title>The gonad and the anvil</title>
      <description>
        <![CDATA[<p>Can someone explain to me in a clear and direct way why isn&#8217;t Genetic Algorithms just a difficult and over-elaborate way to perform a <a href="http://en.wikipedia.org/wiki/Simulated_annealing">Simulated Annealing</a>  optimization?...</p>]]>
      </description>
      <pubDate>Mon, 08 Oct 2007 01:48:47 -0000</pubDate>
      <link>http://network.nature.com/blogs/user/nwerneck/2007/10/08/the-gonad-and-the-anvil</link>
      <guid>http://network.nature.com/blogs/user/nwerneck/2007/10/08/the-gonad-and-the-anvil</guid>
      <dc:creator>Nicolau Werneck</dc:creator>
    </item>
    <item>
      <title>Reductio ad absurdum --- pt. II, Confusing to enlighten you ("Confundindo pra te esclarecer")</title>
      <description>
        <![CDATA[<p>In this second  article for holism scrutiny  I talk about the idea  of a &#8220;whole larger then the  parts&#8221;, a subject that  almost drove me mad in  a recent past. It was trying to  explain my rejection to the idea of  a &#8220;whole larger then the parts&#8221;, presented to  me in the context of gestalt, that  I ended up developing this larger  criticism against the  idea of the  need for a &#8220;holism  theory&#8221; in general.</p>


	<p>You can read the part one of this article at <a href="http://network.nature.com/blogs/user/nwerneck/2007/08/22/reductio-ad-absurdum-pt-i-studying-to-know-how-to-ignore-estudando-pra-saber-ignorar">this address</a> .</p>]]>
      </description>
      <pubDate>Thu, 04 Oct 2007 06:10:01 -0000</pubDate>
      <link>http://network.nature.com/blogs/user/nwerneck/2007/10/04/reductio-ad-absurdum-pt-ii-confusing-to-enlighten-you-confundindo-pra-te-esclarecer</link>
      <guid>http://network.nature.com/blogs/user/nwerneck/2007/10/04/reductio-ad-absurdum-pt-ii-confusing-to-enlighten-you-confundindo-pra-te-esclarecer</guid>
      <dc:creator>Nicolau Werneck</dc:creator>
    </item>
    <item>
      <title>Alcohol halt and sugar shortage</title>
      <description>
        <![CDATA[<p>There  was  recently  an  <a href="doi:10.1038/448736a">interview at  nature</a>  with  Nina Fedoroff where she made some serious  claims which I believe should receive some scrutiny.  Those claims  were all  in an  answer to  the question:  &#8220;What&#8217;s your stance on maize ethanol?&#8221;... What follows is my two cents on her two dollars.</p>]]>
      </description>
      <pubDate>Sun, 30 Sep 2007 18:20:00 -0000</pubDate>
      <link>http://network.nature.com/blogs/user/nwerneck/2007/09/30/alcohol-halt-and-sugar-shortage</link>
      <guid>http://network.nature.com/blogs/user/nwerneck/2007/09/30/alcohol-halt-and-sugar-shortage</guid>
      <dc:creator>Nicolau Werneck</dc:creator>
    </item>
    <item>
      <title>Autoptosis, Necronetics and Ischema-building</title>
      <description>
        <![CDATA[<p>I´m a big fan of Autopoiesis, Cybernetics, Relational Biology, Dissipative Structures and other modern concepts related to systems organization. Recently I learned about the <span class="caps">IBM</span> proposal of Autonomic Computing. But I live restricted to use a very bad computer, a very slow Pentium II runnig Linux, and I tend to see things from this perspective.</p>]]>
      </description>
      <pubDate>Thu, 20 Sep 2007 20:00:16 -0000</pubDate>
      <link>http://network.nature.com/blogs/user/nwerneck/2007/09/20/autoptosis-necronetics-and-ischema-building</link>
      <guid>http://network.nature.com/blogs/user/nwerneck/2007/09/20/autoptosis-necronetics-and-ischema-building</guid>
      <dc:creator>Nicolau Werneck</dc:creator>
    </item>
    <item>
      <title>Reductio ad absurdum --- pt. I,  Studying to know how to ignore ("Estudando pra saber ignorar")</title>
      <description>
        <![CDATA[<p>One of  the most annoying debates  going on today  in the world of  science and philosophy is the alleged dilemma between &#8220;reductionism&#8221; and &#8220;holism&#8221;.</p>


	<p>This debate  usually happens  as a monologue:  those who  denominate themselves &#8220;holists&#8221; differentiate themselves  from the opposing group that  they call the &#8220;reductionists&#8221;, and claim  that they are capable of  studying phenomena that the supposed advocates of the other group can&#8217;t even conceive.</p>


	<p>I believe humanity  is wasting a valuable time in  pretending that this dilemma actually exists.  The self-denominated  holists should stop being paranoid, and those candidates to  the other denomination should try to  stop the building of this pointless wall.</p>


	<p>This is  a series of  two articles criticizing  the idea of holism.   In this first one  I advocate  that what  many people perceive  as an  insufficiency of current  science are  actually  well-known restrictions  imposed by  ourselves, completely understandable by the so-called &#8220;reductionist&#8221; framework.</p>


	<p>You can read part two of this article <a href="http://network.nature.com/blogs/user/nwerneck/2007/10/04/reductio-ad-absurdum-pt-ii-confusing-to-enlighten-you-confundindo-pra-te-esclarecer">at this address</a> .</p>]]>
      </description>
      <pubDate>Wed, 22 Aug 2007 12:05:57 -0000</pubDate>
      <link>http://network.nature.com/blogs/user/nwerneck/2007/08/22/reductio-ad-absurdum-pt-i-studying-to-know-how-to-ignore-estudando-pra-saber-ignorar</link>
      <guid>http://network.nature.com/blogs/user/nwerneck/2007/08/22/reductio-ad-absurdum-pt-i-studying-to-know-how-to-ignore-estudando-pra-saber-ignorar</guid>
      <dc:creator>Nicolau Werneck</dc:creator>
    </item>
    <item>
      <title>Brazilian letters pt. III - Engineering Brazil, or "What do we do now?"</title>
      <description>
        <![CDATA[<p>Brazil is  right now facing an  important moment in its  development. Until last decade the country lived suffocated  by the &#8220;dragon of hyper-inflation&#8221;. Nowdays the level of debate  about economy and politics is much more  mature then in the 1980s and early  1990s. (Tough I&#8217;m hardly capable to judging  this, being only a child back then!). Debating about Brazilian problems is becoming more realistic and exciting each day.</p>]]>
      </description>
      <pubDate>Tue, 21 Aug 2007 13:26:17 -0000</pubDate>
      <link>http://network.nature.com/blogs/user/nwerneck/2007/08/21/brazilian-letters-pt-iii-engineering-brazil-or-what-do-we-do-now</link>
      <guid>http://network.nature.com/blogs/user/nwerneck/2007/08/21/brazilian-letters-pt-iii-engineering-brazil-or-what-do-we-do-now</guid>
      <dc:creator>Nicolau Werneck</dc:creator>
    </item>
    <item>
      <title>Brazilian letters pt. II - Brazilology, or "What's wrong with us??"</title>
      <description>
        <![CDATA[<p>Brazil has been called  for a long time the &#8220;land of  the future&#8221;.  This is from the title of a  book by Austrian writer Stefan Zweig, who  fled to Brazil during the <span class="caps">WWII</span>. Some people also say Brazil is a &#8220;giant asleep&#8221;. But that future never comes&#8230; Until  then Brazilians  keep saying themselves  that &#8220;um dia  esse país ainda  vai dar  certo&#8221;,  (something as  &#8220;some  day this  country  will work  out successfully&#8221;), or asking  themselves whether this is possible  at all, and what could  be it that  holds us  back from  finally taking-off  as the  aircrafts of Santos Dumont. What is wrong with us afterall?...</p>]]>
      </description>
      <pubDate>Tue, 21 Aug 2007 13:21:34 -0000</pubDate>
      <link>http://network.nature.com/blogs/user/nwerneck/2007/08/21/brazilian-letters-pt-ii-brazilology-or-whats-wrong-with-us</link>
      <guid>http://network.nature.com/blogs/user/nwerneck/2007/08/21/brazilian-letters-pt-ii-brazilology-or-whats-wrong-with-us</guid>
      <dc:creator>Nicolau Werneck</dc:creator>
    </item>
    <item>
      <title>Brazilian letters pt. I - Hunger for Swedish gold.</title>
      <description>
        <![CDATA[<p>As a  first post to this  blog I thought I  might talk a  little about Brazilian science now and then, and my perception from my infinitesimal place in it as a regular graduate student. This is a three-part post full of personal views, partial statements and funny facts from wikipedia!...</p>]]>
      </description>
      <pubDate>Tue, 21 Aug 2007 13:15:07 -0000</pubDate>
      <link>http://network.nature.com/blogs/user/nwerneck/2007/08/21/brazilian-letters-pt-i-hunger-for-swedish-gold</link>
      <guid>http://network.nature.com/blogs/user/nwerneck/2007/08/21/brazilian-letters-pt-i-hunger-for-swedish-gold</guid>
      <dc:creator>Nicolau Werneck</dc:creator>
    </item>
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