<?xml version="1.0" encoding="ISO-8859-1"?><article xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
<front>
<journal-meta>
<journal-id>0035-001X</journal-id>
<journal-title><![CDATA[Revista mexicana de física]]></journal-title>
<abbrev-journal-title><![CDATA[Rev. mex. fis.]]></abbrev-journal-title>
<issn>0035-001X</issn>
<publisher>
<publisher-name><![CDATA[Sociedad Mexicana de Física]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S0035-001X2002000300008</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Modelo hidrodinamico del termotransporte de electrones fuera de equilibrio en metales]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Rangel-Huerta]]></surname>
<given-names><![CDATA[A.]]></given-names>
</name>
<xref ref-type="aff" rid="A01"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Carrillo]]></surname>
<given-names><![CDATA[J.L.]]></given-names>
</name>
<xref ref-type="aff" rid="A02"/>
</contrib>
</contrib-group>
<aff id="A01">
<institution><![CDATA[,Benemérita Universidad Autónoma de Puebla Facultad de Ciencias de la Computación ]]></institution>
<addr-line><![CDATA[Puebla ]]></addr-line>
<country>México</country>
</aff>
<aff id="A02">
<institution><![CDATA[,Benemérita Universidad Autónoma de Puebla Instituto de Física ]]></institution>
<addr-line><![CDATA[Puebla ]]></addr-line>
<country>México</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>06</month>
<year>2002</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>06</month>
<year>2002</year>
</pub-date>
<volume>48</volume>
<numero>3</numero>
<fpage>219</fpage>
<lpage>227</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S0035-001X2002000300008&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S0035-001X2002000300008&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S0035-001X2002000300008&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[Se desarrolla un procedimiento semiclásico para describir un gas de electrones fuera de equilibrio en un metal. Por medio del método de momentos de Grad se resuelve la ecuación modificada de Boltzmann dentro del esquema de Lorentz-Sommerfeld. Las ecuaciones de balance no conservadas para la densidad de corriente eléctrica y el flujo de calor se utilizan para describir los principales procesos de relajación y los coeficientes de termotransporte dependientes de la frecuencia, cuyos tiempos de relajación cinéticos se expresan a través de las integrales de Fermi-Dirac.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[We present a semiclassical kinetic model to describe a nonequilibrium metal gas electrons. By means of the Grad method of moments, we solve the modified Boltzmann transport equation in the scheme of the Lorentz-Sommerfeld theory. The non conserved balance equations for the electric current density and the heat flux are used to describe the main relaxation processes and the frequency dependent thermoelectric coefficients. A relevant characteristic of these coefficients are the presence of some kinetic relaxation times expressed through the Fermi-Dirac integrals.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[Teoría cinética]]></kwd>
<kwd lng="es"><![CDATA[gases de electrones]]></kwd>
<kwd lng="es"><![CDATA[efectos termoeléctricos]]></kwd>
<kwd lng="en"><![CDATA[Kinetic theory]]></kwd>
<kwd lng="en"><![CDATA[electron gases]]></kwd>
<kwd lng="en"><![CDATA[thermoelectric effects]]></kwd>
</kwd-group>
</article-meta>
</front><body><![CDATA[ <p align="justify"><font face="verdana" size="4">Investigaci&oacute;n</font></p>     <p align="justify">&nbsp;</p>      <p align="center"><font face="verdana" size="4"><b>Modelo hidrodinamico del termotransporte de electrones fuera de equilibrio en metales</b></font></p>     <p align="center">&nbsp;</p>          <p align="center"><font face="verdana" size="2"><b>A. Rangel&#45;Huerta<sup>1</sup>, J.L. Carrillo<sup>2</sup></b></font></p>     <p align="justify">&nbsp;</p>                <p align="justify"><font face="verdana" size="2"><sup>1 </sup><i>Facultad de Ciencias</i> <i>de</i> <i>la</i> <i>Computaci&oacute;n,</i> <i>BUAP;</i> <i>14</i> <i>Sur y Blvd.</i> <i>Valsequillo</i> <i>C.U.,</i> <i>Puebla,</i> <i>Pue.</i> <i>C.P.</i> <i>72570,</i> <i>M&eacute;xico.</i></font></p>              <p align="justify"><font face="verdana" size="2"><sup>2</sup> <i>Instituto</i> <i>de</i> <i>F&iacute;sica,</i> <i>BUAP;</i> <i>Apdo.</i> <i>Postal</i> <i>J&#45;48</i> <i>C.p.</i> <i>72570,</i> <i>Puebla</i> <i>Pue.,</i> <i>M&eacute;xico.</i></font></p>     <p align="justify">&nbsp;</p>              <p align="justify"><font face="verdana" size="2">Recibido el 11 de octubre de 2001.     ]]></body>
<body><![CDATA[<br> Aceptado el 23 de enero de 2002.</font></p>     <p align="justify">&nbsp;</p>      <p align="justify"><font face="verdana" size="2"><b>Resumen</b></font></p>      <p align="justify"><font face="verdana" size="2">Se desarrolla un procedimiento semicl&aacute;sico para describir un gas de electrones fuera de equilibrio en un metal. Por medio del m&eacute;todo de momentos de Grad se resuelve la ecuaci&oacute;n modificada de Boltzmann dentro del esquema de Lorentz&#45;Sommerfeld. Las ecuaciones de balance no conservadas para la densidad de corriente el&eacute;ctrica y el flujo de calor se utilizan para describir los principales procesos de relajaci&oacute;n y los coeficientes de termotransporte dependientes de la frecuencia, cuyos tiempos de relajaci&oacute;n cin&eacute;ticos se expresan a trav&eacute;s de las integrales de Fermi&#45;Dirac.</font></p>      <p align="justify"><font face="verdana" size="2"><b>Palabras clave:</b> Teor&iacute;a cin&eacute;tica; gases de electrones; efectos termoel&eacute;ctricos.</font></p>      <p align="justify">&nbsp;</p>     <p align="justify"><font face="verdana" size="2"><b>Abstract</b></font></p>      <p align="justify"><font face="verdana" size="2">We present a semiclassical kinetic model to describe a nonequilibrium metal gas electrons. By means of the Grad method of moments, we solve the modified Boltzmann transport equation in the scheme of the Lorentz&#45;Sommerfeld theory. The non conserved balance equations for the electric current density and the heat flux are used to describe the main relaxation processes and the frequency dependent thermoelectric coefficients. A relevant characteristic of these coefficients are the presence of some kinetic relaxation times expressed through the Fermi&#45;Dirac integrals.</font></p>  	    <p align="justify"><font face="verdana" size="2"><b>Keywords:</b> Kinetic theory; electron gases; thermoelectric effects.</font></p>              <p align="justify"><font face="verdana" size="2">PACS: 05.20.Dd; 05.30.Fk; 72.15. Jf</font></p>         ]]></body>
<body><![CDATA[<p align="justify">&nbsp;</p>         <p align="justify"><font face="verdana" size="2"><a href="/pdf/rmf/v48n3/v48n3a8.pdf" target="_blank">DESCARGAR ART&Iacute;CULO EN FORMATO PDF</a></font></p>     <p align="justify">&nbsp;</p>          <p align="justify"><font face="verdana" size="2"><b>Agradecimientos</b></font></p>                       <p align="justify"><font face="verdana" size="2">Este trabajo ha sido parcialmente financiado por CONACyT&#45;M&eacute;xico bajo el rubro Proyecto de Investigaci&oacute;n 32100&#45;E.</font></p>         <p align="justify">&nbsp;</p>         <p align="justify"><font face="verdana" size="2"><b>Referencias bibliogr&aacute;ficas</b></font></p>     <!-- ref --><p align="justify"><font face="verdana" size="2">1. D.K. Ferry, <i>Semiconductors,</i> (Macmillan Pub. Co. 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</ref>
<ref id="B14">
<label>14</label><nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Müller]]></surname>
<given-names><![CDATA[I.]]></given-names>
</name>
<name>
<surname><![CDATA[Ruggeri]]></surname>
<given-names><![CDATA[T.]]></given-names>
</name>
</person-group>
<source><![CDATA[Extended Thermodynamics]]></source>
<year>1993</year>
<publisher-loc><![CDATA[New York ]]></publisher-loc>
<publisher-name><![CDATA[Springer-Verlag]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B15">
<label>15</label><nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Jou]]></surname>
<given-names><![CDATA[D.]]></given-names>
</name>
<name>
<surname><![CDATA[Casas-Vázquez]]></surname>
<given-names><![CDATA[J.]]></given-names>
</name>
<name>
<surname><![CDATA[Lebon]]></surname>
<given-names><![CDATA[G.]]></given-names>
</name>
</person-group>
<source><![CDATA[Extended Irreversible Thermodynamics]]></source>
<year>1993</year>
<publisher-loc><![CDATA[BerlinHeidelberg ]]></publisher-loc>
<publisher-name><![CDATA[Springer-Verlag]]></publisher-name>
</nlm-citation>
</ref>
</ref-list>
</back>
</article>
