<?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>2007-8064</journal-id>
<journal-title><![CDATA[Entreciencias: diálogos en la sociedad del conocimiento]]></journal-title>
<abbrev-journal-title><![CDATA[Entreciencias: diálogos soc. conoc.]]></abbrev-journal-title>
<issn>2007-8064</issn>
<publisher>
<publisher-name><![CDATA[Universidad Nacional Autónoma de México, Escuela Nacional de Estudios Superiores]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S2007-80642019000200025</article-id>
<article-id pub-id-type="doi">10.22201/enesl.20078064e.2019.20.67514</article-id>
<title-group>
<article-title xml:lang="en"><![CDATA[Improved Volume Determination of Standard Weights by Geometric Measurement]]></article-title>
<article-title xml:lang="es"><![CDATA[Determinación Mejorada del Volumen de Pesas Patrón por Medición Geométrica]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Purata Sifuentes]]></surname>
<given-names><![CDATA[Omar Jair]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Universidad de Guanajuato  ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>Mexico</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>00</month>
<year>2019</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>00</month>
<year>2019</year>
</pub-date>
<volume>7</volume>
<numero>20</numero>
<fpage>25</fpage>
<lpage>34</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S2007-80642019000200025&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S2007-80642019000200025&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S2007-80642019000200025&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract  Purpose: To develop an improved mathematical model for volume determination of standardized weights by geometric measurement.  Methodology: The new model eliminates an assumption considered in the current model published in the OIML R 111-1 recommendation, since it considers existing deviations from the assumed shape of the weights in the current model, specifically in the so-called knob and ring sections. These deviations might originate during the manufacturing processes of the weights.  Results: An improved mathematical model for the calculation of the volume of standard weights by geometric measurement was deduced. Additionally, the model has the advantage of eliminating the risk of scratching the weights, which makes it possible to extend the use of the new model to higher accuracy classes.  Limitations: The proposed model involves the possibility of making geometric measurements without surface contact of the weights, for example, with an optical comparator.  Findings: An assessment of the current model against data previously published allows highlighting the relevance and higher accuracy of the new model, which makes it possible to calculate the density of standard weights, even for E class, through only geometric measurements.]]></p></abstract>
<abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen  Objetivo: Desarrollar un modelo matemático mejorado para el cálculo del volumen de pesas estandarizadas mediante mediciones geométricas.  Método: El nuevo modelo elimina una suposición considerada en el modelo actual, publicado en la recomendación OIML R 111-1, ya que considera posibles desviaciones existentes de la forma supuesta de las pesas en el modelo actual, específicamente en las secciones llamadas &#8220;botón&#8221; y &#8220;cuello&#8221;. Dichas desviaciones pueden originarse durante los procesos de fabricación de las pesas.  Resultados: Se dedujo un modelo matemático mejorado para el cálculo del volumen de pesas patrón por medición geométrica. Esto proporciona la ventaja adicional de eliminar el riesgo de rayar las pesas, lo que hace posible extender el uso del nuevo modelo a clases de pesas de mayor exactitud.  Limitaciones: El modelo propuesto supone la posibilidad de realizar mediciones geométricas sin contacto superficial de las pesas, por ejemplo, con un comparador óptico.  Principales hallazgos: Una evaluación del modelo actual con respecto a datos previamente publicados permite resaltar la relevancia y mayor exactitud del nuevo modelo, lo que hace posible calcular la densidad de pesas patrón, incluso de clase E, a través de medidas geométricas únicamente.]]></p></abstract>
<kwd-group>
<kwd lng="en"><![CDATA[Weight volume]]></kwd>
<kwd lng="en"><![CDATA[geometric measurement]]></kwd>
<kwd lng="en"><![CDATA[standard weights]]></kwd>
<kwd lng="es"><![CDATA[volumen]]></kwd>
<kwd lng="es"><![CDATA[medición geométrica]]></kwd>
<kwd lng="es"><![CDATA[pesas patrón]]></kwd>
</kwd-group>
</article-meta>
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