<?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>0120-6230</journal-id>
<journal-title><![CDATA[Revista Facultad de Ingeniería Universidad de Antioquia]]></journal-title>
<abbrev-journal-title><![CDATA[Rev.fac.ing.univ. Antioquia]]></abbrev-journal-title>
<issn>0120-6230</issn>
<publisher>
<publisher-name><![CDATA[Facultad de Ingeniería, Universidad de Antioquia]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S0120-62302017000200065</article-id>
<article-id pub-id-type="doi">10.17533/udea.redin.n83a09</article-id>
<title-group>
<article-title xml:lang="en"><![CDATA[A simple geomagnetic field compensation system for uniform magnetic field applications]]></article-title>
<article-title xml:lang="es"><![CDATA[Un sistema de compensación simple de campo geomagnético para aplicaciones con campos magnéticos uniformes]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Restrepo-Álvarez]]></surname>
<given-names><![CDATA[Andrés Fernando]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Franco-Mejía]]></surname>
<given-names><![CDATA[Edinson]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Cadavid-Ramírez]]></surname>
<given-names><![CDATA[Héctor]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Pinedo-Jaramillo]]></surname>
<given-names><![CDATA[Carlos Rafael]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Universidad del Valle Facultad de Ingeniería Grupo de Investigación en Control Industrial]]></institution>
<addr-line><![CDATA[Cali ]]></addr-line>
<country>Colombia</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Universidad del Valle Facultad de Ingeniería Grupo de Investigación en Alta Tensión (GRALTA)]]></institution>
<addr-line><![CDATA[Cali ]]></addr-line>
<country>Colombia</country>
</aff>
<aff id="Af3">
<institution><![CDATA[,Universidad del Valle Facultad de Ingeniería Grupo de Investigación en Percepción y Sistemas Inteligentes]]></institution>
<addr-line><![CDATA[Cali ]]></addr-line>
<country>Colombia</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>06</month>
<year>2017</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>06</month>
<year>2017</year>
</pub-date>
<numero>83</numero>
<fpage>65</fpage>
<lpage>71</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.co/scielo.php?script=sci_arttext&amp;pid=S0120-62302017000200065&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.co/scielo.php?script=sci_abstract&amp;pid=S0120-62302017000200065&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.co/scielo.php?script=sci_pdf&amp;pid=S0120-62302017000200065&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="en"><p><![CDATA[ABSTRACT In this paper a simple geomagnetic field compensation system for uniform magnetic field applications of low magnitude and frequency is presented. The compensation system is based on an array of Tri-axial Square Helmholtz (TSH) coils, an array of tri-axial Hall effect sensors and a microcontroller system in order to compensate the small variations of the ambient magnetic fields (magnitudes close to the geomagnetic field between 25 &#956;T and 65 &#956;T) on a volume of interest. The geomagnetic field experimentally obtained of 39.5 &#956;T was compensated, achieving a uniform magnetic field of approximately zero. Finally, the proposed system emerges as a simple alternative for control and compensation of magnetic fields in several applications.]]></p></abstract>
<abstract abstract-type="short" xml:lang="es"><p><![CDATA[RESUMEN En este trabajo se presenta la implementación de un sistema de compensación simple de campo geomagnético para aplicaciones con campos magnéticos uniformes de baja magnitud y frecuencia. El sistema de compensación está basado en un arreglo tri-axial de bobinas Helmholtz cuadradas, un arreglo tri-axial de sensores de efecto Hall y un sistema microcontrolado con el propósito de compensar pequeñas variaciones del campo magnético ambiente (magnitudes cercanas al campo geomagnético entre 25 &#956;T y 65 &#956;T) sobre un volumen de trabajo. El campo geomagnético obtenido en las pruebas experimentales de 39,5 &#956;T fue compensado, logrando un volumen uniforme con campo magnético aproximadamente igual a cero. Finalmente, el sistema propuesto surge como una alternativa simple para el control y compensación de campo magnético en diversas aplicaciones.]]></p></abstract>
<kwd-group>
<kwd lng="en"><![CDATA[Uniform magnetic field]]></kwd>
<kwd lng="en"><![CDATA[square Helmholtz coils]]></kwd>
<kwd lng="en"><![CDATA[tri-axial Hall effect sensors]]></kwd>
<kwd lng="en"><![CDATA[magnetic field control]]></kwd>
<kwd lng="en"><![CDATA[geomagnetic field compensation]]></kwd>
<kwd lng="es"><![CDATA[Campo magnético uniforme]]></kwd>
<kwd lng="es"><![CDATA[bobinas Helmholtz cuadradas]]></kwd>
<kwd lng="es"><![CDATA[sensores de efecto Hall tri-axiales]]></kwd>
<kwd lng="es"><![CDATA[control de campo magnético]]></kwd>
<kwd lng="es"><![CDATA[compensación de campo geomagnético]]></kwd>
</kwd-group>
</article-meta>
</front><back>
<ref-list>
<ref id="B1">
<label>1</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Smith]]></surname>
<given-names><![CDATA[A]]></given-names>
</name>
<name>
<surname><![CDATA[Anderson]]></surname>
<given-names><![CDATA[B. E]]></given-names>
</name>
<name>
<surname><![CDATA[Chaudhury]]></surname>
<given-names><![CDATA[S]]></given-names>
</name>
<name>
<surname><![CDATA[Jessen]]></surname>
<given-names><![CDATA[P. S]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Three-axis measurement and cancellation of background magnetic fields to less than 50 µG in a cold atom experiment]]></article-title>
<source><![CDATA[Journal of Physics B: Atomic, Molecular and Optical Physics]]></source>
<year>2011</year>
<volume>44</volume>
<numero>20</numero>
<issue>20</issue>
</nlm-citation>
</ref>
<ref id="B2">
<label>2</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Khalil]]></surname>
<given-names><![CDATA[I]]></given-names>
</name>
<name>
<surname><![CDATA[Abelmann]]></surname>
<given-names><![CDATA[L]]></given-names>
</name>
<name>
<surname><![CDATA[Misra]]></surname>
<given-names><![CDATA[S]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Magnetic-based motion control of paramagnetic microparticles with disturbance compensation]]></article-title>
<source><![CDATA[IEEE Transactions on Magnetics]]></source>
<year>2014</year>
<volume>50</volume>
<numero>10</numero>
<issue>10</issue>
<page-range>1-10</page-range></nlm-citation>
</ref>
<ref id="B3">
<label>3</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Go]]></surname>
<given-names><![CDATA[G]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Electromagnetic navigation system using simple coil structure (4 coils) for 3-D locomotive microrobot]]></article-title>
<source><![CDATA[IEEE Transactions on Magnetics]]></source>
<year>2015</year>
<volume>51</volume>
<numero>4</numero>
<issue>4</issue>
<page-range>1-7</page-range></nlm-citation>
</ref>
<ref id="B4">
<label>4</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Nam]]></surname>
<given-names><![CDATA[J. K]]></given-names>
</name>
<name>
<surname><![CDATA[Jeon]]></surname>
<given-names><![CDATA[S. M]]></given-names>
</name>
<name>
<surname><![CDATA[Lee]]></surname>
<given-names><![CDATA[W. S]]></given-names>
</name>
<name>
<surname><![CDATA[Jang]]></surname>
<given-names><![CDATA[G. H]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Control of a three-dimensional magnetic force generated from a magnetic navigation system to precisely manipulate the locomotion of a magnetic microrobot]]></article-title>
<source><![CDATA[Journal of Applied Physics]]></source>
<year>2015</year>
<volume>117</volume>
<numero>17</numero>
<issue>17</issue>
<page-range>1-6</page-range></nlm-citation>
</ref>
<ref id="B5">
<label>5</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Schuderer]]></surname>
<given-names><![CDATA[J]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[In vitro exposure apparatus for ELF magnetic fields]]></article-title>
<source><![CDATA[Bioelectromagnetics]]></source>
<year>2004</year>
<volume>25</volume>
<numero>8</numero>
<issue>8</issue>
<page-range>582-91</page-range></nlm-citation>
</ref>
<ref id="B6">
<label>6</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Restrepo]]></surname>
<given-names><![CDATA[A. F]]></given-names>
</name>
<name>
<surname><![CDATA[Franco]]></surname>
<given-names><![CDATA[E]]></given-names>
</name>
<name>
<surname><![CDATA[Pinedo]]></surname>
<given-names><![CDATA[C. R]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Metodología de diseño e implementación de un sistema para generación de campos magnéticos uniformes con bobinas Helmholtz cuadrada tri-axial]]></article-title>
<source><![CDATA[Informacion Tecnologica]]></source>
<year>2014</year>
<volume>25</volume>
<numero>2</numero>
<issue>2</issue>
<page-range>3-14</page-range></nlm-citation>
</ref>
<ref id="B7">
<label>7</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Krylov]]></surname>
<given-names><![CDATA[V. V]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[An experimental study of the biological effects of geomagnetic disturbances: The impact of a typical geomagnetic storm and its constituents on plants and animals]]></article-title>
<source><![CDATA[Journal of Atmospheric and Solar-Terrestrial Physics]]></source>
<year>2014</year>
<volume>110-111</volume>
<page-range>28-36</page-range></nlm-citation>
</ref>
<ref id="B8">
<label>8</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Chen]]></surname>
<given-names><![CDATA[J]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[An improved 3-D magnetic field generator with larger uniform region]]></article-title>
<source><![CDATA[IEEE Transactions on Applied Superconductivity]]></source>
<year>2016</year>
<volume>26</volume>
<numero>7</numero>
<issue>7</issue>
<page-range>1-5</page-range></nlm-citation>
</ref>
<ref id="B9">
<label>9</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Forte]]></surname>
<given-names><![CDATA[G. O]]></given-names>
</name>
<name>
<surname><![CDATA[Farrher]]></surname>
<given-names><![CDATA[G]]></given-names>
</name>
<name>
<surname><![CDATA[Canali]]></surname>
<given-names><![CDATA[L. R]]></given-names>
</name>
<name>
<surname><![CDATA[Anoardo]]></surname>
<given-names><![CDATA[E]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Automatic shielding-shimming magnetic field compensator for excluded volume applications]]></article-title>
<source><![CDATA[IEEE Transactions on Control Systems Technology]]></source>
<year>2010</year>
<volume>18</volume>
<numero>4</numero>
<issue>4</issue>
<page-range>976-83</page-range></nlm-citation>
</ref>
<ref id="B10">
<label>10</label><nlm-citation citation-type="">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Kellogg]]></surname>
<given-names><![CDATA[J]]></given-names>
</name>
</person-group>
<source><![CDATA[Magnetic active compensation system (MACS) for electron microscopy]]></source>
<year>2003</year>
</nlm-citation>
</ref>
<ref id="B11">
<label>11</label><nlm-citation citation-type="">
<collab>Bartington Intruments Ltd</collab>
<source><![CDATA[Mag-03 and Mag690 Bartington Instruments&#8217; magnetometers for use in magnetic field cancellation and custom field creation - Case study]]></source>
<year>2001</year>
</nlm-citation>
</ref>
<ref id="B12">
<label>12</label><nlm-citation citation-type="">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Dunnam]]></surname>
<given-names><![CDATA[C]]></given-names>
</name>
</person-group>
<source><![CDATA[Active feedback system for suppression of alternating magnetic fields]]></source>
<year></year>
</nlm-citation>
</ref>
<ref id="B13">
<label>13</label><nlm-citation citation-type="">
<collab>ETS-Lindgren</collab>
<source><![CDATA[Magnetic active compensation system for electron beam applications]]></source>
<year>2008</year>
</nlm-citation>
</ref>
<ref id="B14">
<label>14</label><nlm-citation citation-type="">
<collab>MEDA</collab>
<source><![CDATA[Compensation of earth&#8217;s field with a three-axis helmholtz coil]]></source>
<year>1999</year>
</nlm-citation>
</ref>
<ref id="B15">
<label>15</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Martino]]></surname>
<given-names><![CDATA[C. F]]></given-names>
</name>
<name>
<surname><![CDATA[Portelli]]></surname>
<given-names><![CDATA[L]]></given-names>
</name>
<name>
<surname><![CDATA[McCabe]]></surname>
<given-names><![CDATA[K]]></given-names>
</name>
<name>
<surname><![CDATA[Hernandez]]></surname>
<given-names><![CDATA[M]]></given-names>
</name>
<name>
<surname><![CDATA[Barnes]]></surname>
<given-names><![CDATA[F]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Reduction of the Earth&#8217;s magnetic field inhibits growth rates of model cancer cell lines,]]></article-title>
<source><![CDATA[Bioelectromagnetics]]></source>
<year>2010</year>
<volume>31</volume>
<numero>8</numero>
<issue>8</issue>
<page-range>649-55</page-range></nlm-citation>
</ref>
<ref id="B16">
<label>16</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Park]]></surname>
<given-names><![CDATA[P. G]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Automatic compensation of the Earth&#8217;s magnetic field and a calibration system for magnetometers below 1 mT]]></article-title>
<source><![CDATA[Journal of the Korean Physical Society]]></source>
<year>2005</year>
<volume>47</volume>
<numero>4</numero>
<issue>4</issue>
<page-range>583-5</page-range></nlm-citation>
</ref>
<ref id="B17">
<label>17</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Raganella]]></surname>
<given-names><![CDATA[L]]></given-names>
</name>
<name>
<surname><![CDATA[Guelfi]]></surname>
<given-names><![CDATA[M]]></given-names>
</name>
<name>
<surname><![CDATA[D&#8217;Inzeo]]></surname>
<given-names><![CDATA[G]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Triaxial exposure system providing static and low-frequency magnetic fields for in vivo and in vitro biological studies]]></article-title>
<source><![CDATA[Bioelectrochemistry and Bioenergetics]]></source>
<year>1994</year>
<volume>35</volume>
<numero>1-2</numero>
<issue>1-2</issue>
<page-range>121-6</page-range></nlm-citation>
</ref>
<ref id="B18">
<label>18</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Novickij]]></surname>
<given-names><![CDATA[V]]></given-names>
</name>
<name>
<surname><![CDATA[Grainys]]></surname>
<given-names><![CDATA[A]]></given-names>
</name>
<name>
<surname><![CDATA[Novickij]]></surname>
<given-names><![CDATA[J]]></given-names>
</name>
<name>
<surname><![CDATA[Lucinskis]]></surname>
<given-names><![CDATA[A]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Programmable pulsed magnetic field system for biological applications]]></article-title>
<source><![CDATA[IEEE Transactions on Magnetics]]></source>
<year>2014</year>
<volume>50</volume>
<numero>11</numero>
<issue>11</issue>
<page-range>1-4</page-range></nlm-citation>
</ref>
<ref id="B19">
<label>19</label><nlm-citation citation-type="confpro">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Malafronte]]></surname>
<given-names><![CDATA[A. A]]></given-names>
</name>
<name>
<surname><![CDATA[Martins]]></surname>
<given-names><![CDATA[M. N]]></given-names>
</name>
</person-group>
<source><![CDATA[Inexpensive magnetic field controller]]></source>
<year></year>
<conf-name><![CDATA[ Particle Accelerator Conference (PAC)]]></conf-name>
<conf-date>2005</conf-date>
<conf-loc>Knoxville, USA </conf-loc>
<page-range>2833-5</page-range></nlm-citation>
</ref>
<ref id="B20">
<label>20</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Farina]]></surname>
<given-names><![CDATA[M]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[ELF-EMFs induced effects on cell lines: Controlling ELF generation in laboratory]]></article-title>
<source><![CDATA[Progress In Electromagnetics Research B]]></source>
<year>2010</year>
<volume>24</volume>
<page-range>131-53</page-range></nlm-citation>
</ref>
<ref id="B21">
<label>21</label><nlm-citation citation-type="confpro">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Li]]></surname>
<given-names><![CDATA[Y]]></given-names>
</name>
<name>
<surname><![CDATA[Zhang]]></surname>
<given-names><![CDATA[X]]></given-names>
</name>
<name>
<surname><![CDATA[Chen]]></surname>
<given-names><![CDATA[G]]></given-names>
</name>
<name>
<surname><![CDATA[Cui]]></surname>
<given-names><![CDATA[X]]></given-names>
</name>
<name>
<surname><![CDATA[Liu]]></surname>
<given-names><![CDATA[J]]></given-names>
</name>
</person-group>
<source><![CDATA[Design and error analysis of geomagnetic measurement circuit based on triaxial magneto-resistive sensor]]></source>
<year></year>
<conf-name><![CDATA[ International Conference on Control, Automation and Systems Engineering (CASE)]]></conf-name>
<conf-date>2011</conf-date>
<conf-loc>Singapore, Singapore </conf-loc>
<page-range>1-3</page-range></nlm-citation>
</ref>
<ref id="B22">
<label>22</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Bell]]></surname>
<given-names><![CDATA[G. B]]></given-names>
</name>
<name>
<surname><![CDATA[Marino]]></surname>
<given-names><![CDATA[A. A]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Exposure system for production of uniform magnetic fields]]></article-title>
<source><![CDATA[Journal of Bioelectricity]]></source>
<year>1989</year>
<volume>8</volume>
<numero>2</numero>
<issue>2</issue>
<page-range>147-58</page-range></nlm-citation>
</ref>
<ref id="B23">
<label>23</label><nlm-citation citation-type="">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Tsz-Ka]]></surname>
<given-names><![CDATA[T]]></given-names>
</name>
</person-group>
<source><![CDATA[Tri-axial Square Helmholtz coil for Neutron EDM Experiment]]></source>
<year>2004</year>
</nlm-citation>
</ref>
<ref id="B24">
<label>24</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Brodic]]></surname>
<given-names><![CDATA[D]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Measurement of the extremely low frequency magnetic field in the laptop neighborhood]]></article-title>
<source><![CDATA[Revista Facultad de Ingeniería Universidad de Antioquia]]></source>
<year>2015</year>
<numero>76</numero>
<issue>76</issue>
<page-range>39-45</page-range></nlm-citation>
</ref>
<ref id="B25">
<label>25</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Satav]]></surname>
<given-names><![CDATA[S. M]]></given-names>
</name>
<name>
<surname><![CDATA[Agarwal]]></surname>
<given-names><![CDATA[V]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Design and development of a low-cost digital magnetic field meter with wide dynamic range for EMC precompliance measurements and other applications]]></article-title>
<source><![CDATA[IEEE Transactions on Instrumentation and Measurement]]></source>
<year>2009</year>
<volume>58</volume>
<numero>8</numero>
<issue>8</issue>
<page-range>2837-46</page-range></nlm-citation>
</ref>
<ref id="B26">
<label>26</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Restrepo]]></surname>
<given-names><![CDATA[A. F]]></given-names>
</name>
<name>
<surname><![CDATA[Rusca]]></surname>
<given-names><![CDATA[J. A]]></given-names>
</name>
<name>
<surname><![CDATA[Franco]]></surname>
<given-names><![CDATA[E]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Design of a simple electronic load controlled with configurable load profile]]></article-title>
<source><![CDATA[Entre Ciencia e Ingeniería]]></source>
<year>2013</year>
<volume>7</volume>
<numero>13</numero>
<issue>13</issue>
<page-range>9-13</page-range></nlm-citation>
</ref>
<ref id="B27">
<label>27</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Sobaih]]></surname>
<given-names><![CDATA[A]]></given-names>
</name>
<name>
<surname><![CDATA[Abouzalam]]></surname>
<given-names><![CDATA[B]]></given-names>
</name>
<name>
<surname><![CDATA[Abdelrahman]]></surname>
<given-names><![CDATA[E]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Intelligent UPS inverter control design using microcontroller]]></article-title>
<source><![CDATA[Journal of Energy Technologies and Policy]]></source>
<year>2014</year>
<volume>4</volume>
<numero>2</numero>
<issue>2</issue>
<page-range>34-47</page-range></nlm-citation>
</ref>
<ref id="B28">
<label>28</label><nlm-citation citation-type="confpro">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Olivares]]></surname>
<given-names><![CDATA[J. C]]></given-names>
</name>
<name>
<surname><![CDATA[Campero]]></surname>
<given-names><![CDATA[E]]></given-names>
</name>
<name>
<surname><![CDATA[Escarela]]></surname>
<given-names><![CDATA[R]]></given-names>
</name>
<name>
<surname><![CDATA[Magdaleno]]></surname>
<given-names><![CDATA[S]]></given-names>
</name>
<name>
<surname><![CDATA[Blanco]]></surname>
<given-names><![CDATA[E]]></given-names>
</name>
</person-group>
<source><![CDATA[Coil systems to generate uniform magnetic field volumes]]></source>
<year></year>
<conf-name><![CDATA[ COMSOL Conference]]></conf-name>
<conf-date>2010</conf-date>
<conf-loc>Boston, USA </conf-loc>
<page-range>1-7</page-range></nlm-citation>
</ref>
<ref id="B29">
<label>29</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Hulot]]></surname>
<given-names><![CDATA[G]]></given-names>
</name>
<name>
<surname><![CDATA[Finlay]]></surname>
<given-names><![CDATA[C]]></given-names>
</name>
<name>
<surname><![CDATA[Constable]]></surname>
<given-names><![CDATA[C]]></given-names>
</name>
<name>
<surname><![CDATA[Olsen]]></surname>
<given-names><![CDATA[N]]></given-names>
</name>
<name>
<surname><![CDATA[Mandea]]></surname>
<given-names><![CDATA[M]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[The magnetic field of planet Earth]]></article-title>
<source><![CDATA[Space Science Reviews]]></source>
<year>2010</year>
<volume>152</volume>
<numero>1</numero>
<issue>1</issue>
<page-range>159-222</page-range></nlm-citation>
</ref>
<ref id="B30">
<label>30</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Longoria]]></surname>
<given-names><![CDATA[R]]></given-names>
</name>
<name>
<surname><![CDATA[Oliver]]></surname>
<given-names><![CDATA[M. A]]></given-names>
</name>
<name>
<surname><![CDATA[Torres]]></surname>
<given-names><![CDATA[J]]></given-names>
</name>
<name>
<surname><![CDATA[González]]></surname>
<given-names><![CDATA[J. L]]></given-names>
</name>
<name>
<surname><![CDATA[Méndez]]></surname>
<given-names><![CDATA[G. M]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Diseño, construcción y prueba de un prototipo automático para compostaje]]></article-title>
<source><![CDATA[Revista Facultad de Ingeniería Universidad de Antioquia]]></source>
<year>2014</year>
<numero>70</numero>
<issue>70</issue>
<page-range>185-96</page-range></nlm-citation>
</ref>
</ref-list>
</back>
</article>
