<?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>1870-3542</journal-id>
<journal-title><![CDATA[Revista mexicana de física E]]></journal-title>
<abbrev-journal-title><![CDATA[Rev. mex. fís. E]]></abbrev-journal-title>
<issn>1870-3542</issn>
<publisher>
<publisher-name><![CDATA[Sociedad Mexicana de Física]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S1870-35422014000200005</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Perturbaciones y acoplamientos en un oscilador no lineal: el caso del oscilador salino]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Alarcón]]></surname>
<given-names><![CDATA[M.]]></given-names>
</name>
<xref ref-type="aff" rid="A01"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[González]]></surname>
<given-names><![CDATA[H.]]></given-names>
</name>
<xref ref-type="aff" rid="A01"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[García]]></surname>
<given-names><![CDATA[J.]]></given-names>
</name>
<xref ref-type="aff" rid="A01"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Falcón-Neri]]></surname>
<given-names><![CDATA[A.]]></given-names>
</name>
<xref ref-type="aff" rid="A01"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Torres]]></surname>
<given-names><![CDATA[A.]]></given-names>
</name>
<xref ref-type="aff" rid="A01"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Cabrera-Manuel]]></surname>
<given-names><![CDATA[A.]]></given-names>
</name>
<xref ref-type="aff" rid="A01"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Arce]]></surname>
<given-names><![CDATA[H.]]></given-names>
</name>
<xref ref-type="aff" rid="A01"/>
</contrib>
</contrib-group>
<aff id="A01">
<institution><![CDATA[,Universidad Nacional Autónoma de México Facultad de Ciencias Departamento de Física]]></institution>
<addr-line><![CDATA[México Distrito Federal]]></addr-line>
<country>México</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>12</month>
<year>2014</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>12</month>
<year>2014</year>
</pub-date>
<volume>60</volume>
<numero>2</numero>
<fpage>141</fpage>
<lpage>147</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S1870-35422014000200005&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S1870-35422014000200005&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S1870-35422014000200005&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[El estudio de la dinámica no lineal ha tomado un auge considerable en las últimas décadas. Parte de este auge se explica porque su campo de aplicación no se restringe a la física o las matemáticas, sino que se extiende a la biología, la medicina, la economía, las finanzas, la robótica y a muchas otras áreas. Uno de los fenómenos que puede ocurrir en estos sistemas es el surgimiento de oscilaciones no lineales con un ciclo atractor robusto, es decir, fenómenos que se repiten con regularidad y al ser perturbados regresan a su ciclo natural de oscilación. Para estudiarlos, un procedimiento muy importante es el análisis de su comportamiento cuando son forzados mediante perturbaciones periódicas. No obstante la importancia de estos fenómenos, su estudio se encuentra ausente de la mayoría de los programas de licenciaturas en Física. Una razón de ello podría ser la complejidad que tienen muchos dispositivos experimentales con que se suelen estudiar. En este artículo se presenta un dispositivo experimental muy simple de construir: el oscilador salino, que permite ensenar de manera clara, directa y muy visual el estudio del efecto de perturbaciones sobre osciladores no lineales con un ciclo atractor robusto.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[Nonlinear Dynamics has had a considerable boom in recent decades. This growth in partially explained because of its scope not being restricted to physics or mathematics, but extends to biology, medicine, economy, finances, robotics, and many other areas. Among the characteristic phenomena that may occur in these systems is the emergence of non-linear oscillations with a robust attractor cycle, i.e., phenomena that repeat on a regular basis and when are disturbed they return to their natural cycle of oscillation. A very important procedure to study them is the analysis of their behavior when are periodically forced. Despite the importance of these phenomena, their study is absent from the majority of undergraduate physics programs. A reason for that could be the complexity of many experimental set up employed to analyze them. This article presents a very simple experimental device: the saline oscillator, which allows a clear, direct and highly visual way for teaching the perturbation effect on nonlinear oscillators.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[Dinámica no lineal]]></kwd>
<kwd lng="es"><![CDATA[ciclo límite]]></kwd>
<kwd lng="es"><![CDATA[oscilador salino]]></kwd>
<kwd lng="en"><![CDATA[Non-linear dynamics]]></kwd>
<kwd lng="en"><![CDATA[limit cycle]]></kwd>
<kwd lng="en"><![CDATA[saline oscillator]]></kwd>
</kwd-group>
</article-meta>
</front><body><![CDATA[  	    <p align="justify"><font face="verdana" size="4">Educaci&oacute;n</font></p>      <p align="justify"><font face="verdana" size="2">&nbsp;</font></p>  	    <p align="center"><font face="verdana" size="4"><b>Perturbaciones y acoplamientos en un oscilador no lineal: el caso del oscilador salino</b></font></p>  	    <p align="center"><font face="verdana" size="2">&nbsp;</font></p>  	    <p align="center"><font face="verdana" size="2"><b>M. Alarc&oacute;n, H. Gonz&aacute;lez, J. Garc&iacute;a, A. Falc&oacute;n&#45;Neri, A. Torres, A. Cabrera&#45;Manuel y H. Arce</b></font></p>  	    <p align="justify"><font face="verdana" size="2">&nbsp;</font></p>  	    <p align="justify"><font face="verdana" size="2"><i>Departamento de F&iacute;sica, Facultad de Ciencias, Universidad Nacional Aut&oacute;noma de M&eacute;xico,</i> <i>M&eacute;xico D.F. 04510, M&eacute;xico.</i></font></p>  	    <p align="justify"><font face="verdana" size="2">&nbsp;</font></p>  	    <p align="justify"><font face="verdana" size="2">Received 2 September 2014;    ]]></body>
<body><![CDATA[<br> 	accepted 19 December 2014</font></p>  	    <p align="justify"><font face="verdana" size="2">&nbsp;</font></p>  	    <p align="justify"><font face="verdana" size="2"><b>Resumen</b></font></p>  	    <p align="justify"><font face="verdana" size="2">El estudio de la din&aacute;mica no lineal ha tomado un auge considerable en las &uacute;ltimas d&eacute;cadas. Parte de este auge se explica porque su campo de aplicaci&oacute;n no se restringe a la f&iacute;sica o las matem&aacute;ticas, sino que se extiende a la biolog&iacute;a, la medicina, la econom&iacute;a, las finanzas, la rob&oacute;tica y a muchas otras &aacute;reas. Uno de los fen&oacute;menos que puede ocurrir en estos sistemas es el surgimiento de oscilaciones no lineales con un ciclo atractor robusto, es decir, fen&oacute;menos que se repiten con regularidad y al ser perturbados regresan a su ciclo natural de oscilaci&oacute;n. Para estudiarlos, un procedimiento muy importante es el an&aacute;lisis de su comportamiento cuando son forzados mediante perturbaciones peri&oacute;dicas. No obstante la importancia de estos fen&oacute;menos, su estudio se encuentra ausente de la mayor&iacute;a de los programas de licenciaturas en F&iacute;sica. Una raz&oacute;n de ello podr&iacute;a ser la complejidad que tienen muchos dispositivos experimentales con que se suelen estudiar. En este art&iacute;culo se presenta un dispositivo experimental muy simple de construir: el oscilador salino, que permite ensenar de manera clara, directa y muy visual el estudio del efecto de perturbaciones sobre osciladores no lineales con un ciclo atractor robusto.</font></p>  	    <p align="justify"><font face="verdana" size="2"><b>Palabras clave</b><i>:</i> Din&aacute;mica no lineal; ciclo l&iacute;mite; oscilador salino.</font></p>  	    <p align="justify"><font face="verdana" size="2">&nbsp;</font></p>  	    <p align="justify"><font face="verdana" size="2"><b>Abstract</b></font></p>  	    <p align="justify"><font face="verdana" size="2">Nonlinear Dynamics has had a considerable boom in recent decades. This growth in partially explained because of its scope not being restricted to physics or mathematics, but extends to biology, medicine, economy, finances, robotics, and many other areas. Among the characteristic phenomena that may occur in these systems is the emergence of non&#45;linear oscillations with a robust attractor cycle, <i>i.e.,</i> phenomena that repeat on a regular basis and when are disturbed they return to their natural cycle of oscillation. A very important procedure to study them is the analysis of their behavior when are periodically forced. Despite the importance of these phenomena, their study is absent from the majority of undergraduate physics programs. A reason for that could be the complexity of many experimental set up employed to analyze them. This article presents a very simple experimental device: the saline oscillator, which allows a clear, direct and highly visual way for teaching the perturbation effect on nonlinear oscillators.</font></p>  	    <p align="justify"><font face="verdana" size="2"><b>Keywords</b><i>:</i> Non&#45;linear dynamics; limit cycle; saline oscillator.</font></p>  	    <p align="justify"><font face="verdana" size="2">&nbsp;</font></p>  	    ]]></body>
<body><![CDATA[<p align="justify"><font face="verdana" size="2">PACS: 82.40.Bj; 05.45.a; 47.20.Ky</font></p>  	    <p align="justify">&nbsp;</p>     <p align="justify"><font size="2" face="verdana"><a href="/pdf/rmfe/v60n2/v60n2a5.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">HA y HG agradecen las largas discusiones y estimulantes sesiones experimentales con Michael Guevara y Flavio Fenton. Agradecen tambi&eacute;n a los muchos estudiantes que se han divertido "jugando" con el Oscilador Salino, y que nos han contagiado de su esp&iacute;ritu de juego, cabe recordar entre ellos a Cintli Lara, Dulce Esperanza Ordo&ntilde;ez, Berenice M&aacute;rquez, I&ntilde;igo Romero y Ala&iacute;de Marina Arce. Este trabajo recibi&oacute; apoyo del donativo PAPIIT UNAM&#45;IN118611.</font></p>  	    <p align="justify"><font face="verdana" size="2">&nbsp;</font><font face="verdana" size="2">&nbsp;</font></p>     <p align="justify"><font face="verdana" size="2"><b>Bibliograf&iacute;a</b></font></p>  	    <!-- ref --><p align="justify"><font face="verdana" size="2">1.&nbsp;S. Martin, <i>Geophys. Astrophys. Fluid Dyn.</i> <b>1</b> (1970) 143.    &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;[&#160;<a href="javascript:void(0);" onclick="javascript: window.open('/scielo.php?script=sci_nlinks&ref=8461912&pid=S1870-3542201400020000500001&lng=','','width=640,height=500,resizable=yes,scrollbars=1,menubar=yes,');">Links</a>&#160;]<!-- end-ref --></font></p>  	    ]]></body>
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