<?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>1794-1237</journal-id>
<journal-title><![CDATA[Revista EIA]]></journal-title>
<abbrev-journal-title><![CDATA[Rev.EIA.Esc.Ing.Antioq]]></abbrev-journal-title>
<issn>1794-1237</issn>
<publisher>
<publisher-name><![CDATA[Escuela de ingenieria de Antioquia]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S1794-12372018000100031</article-id>
<article-id pub-id-type="doi">10.24050/reia.v15i29.1211</article-id>
<title-group>
<article-title xml:lang="en"><![CDATA[VEHICLE LOCATION MODELS FOR EMERGENCY MEDICAL SERVICES. AN APPLICATION FOR A COLOMBIAN COMPANY]]></article-title>
<article-title xml:lang="es"><![CDATA[MODELOS DE LOCALIZACIÓN DE VEHÍCULOS PARA SERVICIOS DE EMERGENCIA MÉDICA. UNA APLICACIÓN PARA UNA COMPAÑÍA COLOMBIANA]]></article-title>
<article-title xml:lang="pt"><![CDATA[MODELOS DE LOCALIZAÇÃO DE VEÍCULOS PARA SERVIÇOS MÉDICOS DE EMERGÊNCIA. UM PEDIDO PARA UMA EMPRESA COLOMBIANA]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Zapata-Murillo]]></surname>
<given-names><![CDATA[Pablo]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Baldoquin de la Peña]]></surname>
<given-names><![CDATA[Maria G.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,aff1  ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
</aff>
<aff id="Af2">
<institution><![CDATA[,Universidad EAFIT  ]]></institution>
<addr-line><![CDATA[Medellín ]]></addr-line>
<country>Colombia</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>06</month>
<year>2018</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>06</month>
<year>2018</year>
</pub-date>
<volume>15</volume>
<numero>29</numero>
<fpage>31</fpage>
<lpage>46</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.co/scielo.php?script=sci_arttext&amp;pid=S1794-12372018000100031&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.co/scielo.php?script=sci_abstract&amp;pid=S1794-12372018000100031&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.co/scielo.php?script=sci_pdf&amp;pid=S1794-12372018000100031&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="en"><p><![CDATA[ABSTRACT Ambulance location, in a certain area of coverage, is a key element in reducing the waiting time of a potential patient and the initiation a healthcare service in Emergency Medical Services (EMS). The Operations Research area, developing and solving adequate mathematical models, helps to make good decisions in EMS. We propose two variants of a Mixed Integer Linear Programming model for locating heterogeneous fleet vehicles to support different types of services in emergency medical care, taking into account the operational requirements of a health care service company in Colombia. The proposed models do not exactly match any of those found in the literature. The models are solved with Gurobi solver and the modeling language AMPL and they are successfully validated with historical data of the company under study and some estimates based on external sources. These obtained results are compared using an adaptation of the concept of Preparedness taken from the literature for ambulance positioning, as regard to measure the readiness of the system to the expected demand. The new results show that the relevance of each model depends of the prioritization of services and/ or areas that the company considers.]]></p></abstract>
<abstract abstract-type="short" xml:lang="es"><p><![CDATA[RESUMEN La localización de ambulancias, en una determinada área de cobertura, es un elemento clave para reducir el tiempo de espera de un paciente potencial y la iniciación del servicio de atención médica en los Servicios Médicos de Emergencia (EMS). La Investigación de Operaciones, desarrollando y resolviendo modelos matemáticos adecuados, ayuda a tomar buenas decisiones en el EMS. Proponemos dos variantes de un modelo de programación lineal mixta para localizar vehículos de flota heterogénea y apoyar diferentes tipos de servicios en atención médica de emergencias, teniendo en cuenta las necesidades operacionales de una empresa de servicios de salud en Colombia. Los modelos propuestos no coinciden exactamente con ninguno de los encontrados en la literatura. Los modelos se resuelven con el solver Gurobi y el lenguaje de modelado AMPL y son validados con éxito con datos históricos de la empresa en estudio y algunas estimaciones basadas en fuentes externas. Estos resultados se comparan utilizando una adaptación del concepto de Preparednessd de la literatura para la ubicación de ambulancias, en lo que respecta a la disposición del sistema a la demanda esperada. Los nuevos resultados muestran que la relevancia de cada modelo depende de la priorización de servicios y/o áreas que la empresa considere.]]></p></abstract>
<abstract abstract-type="short" xml:lang="pt"><p><![CDATA[RESUMO A localização da ambulância, em uma certa área de cobertura, é um elemento chave na redução do tempo de espera de um paciente potencial e na iniciação de um serviço de saúde em Serviços Médicos de Emergência (EMS). A área de Pesquisa de Operações, desenvolvendo e resolvendo modelos matemáticos adequados, ajuda a tomar boas decisões no EMS. Propomos duas variantes de um modelo de Programação Linear Inteira Mista para localizar veículos de frotas heterogêneos para suportar diferentes tipos de serviços em atendimento médico de emergência, levando em consideração os requisitos operacionais de uma empresa de serviços de saúde na Colômbia. Os modelos propostos não correspondem exatamente a nenhum dos encontrados na literatura. Os modelos são resolvidos com o solucionador Gurobi e a linguagem de modelagem AMPL e são validados com dados históricos da empresa em estudo e algumas estimativas baseadas em fontes externas. Estes resultados obtidos são comparados usando uma adaptação do conceito de Preparação extraído da literatura para o posicionamento da ambulância, no que se refere à medida da disponibilidade do sistema para a demanda esperada. Os novos resultados mostram que a relevância de cada modelo depende da priorização de serviços e / ou áreas que a empresa considere.]]></p></abstract>
<kwd-group>
<kwd lng="en"><![CDATA[Emergency Medical Services]]></kwd>
<kwd lng="en"><![CDATA[hospital logistics]]></kwd>
<kwd lng="en"><![CDATA[ambulance location]]></kwd>
<kwd lng="en"><![CDATA[mathematical models]]></kwd>
<kwd lng="en"><![CDATA[linear programming]]></kwd>
<kwd lng="es"><![CDATA[Servicios de Emergencia Médica]]></kwd>
<kwd lng="es"><![CDATA[Logística Hospitalaria]]></kwd>
<kwd lng="es"><![CDATA[Localización de ambulancias]]></kwd>
<kwd lng="es"><![CDATA[Modelos Matemáticos]]></kwd>
<kwd lng="es"><![CDATA[programación lineal]]></kwd>
<kwd lng="pt"><![CDATA[Serviços médicos de emergência]]></kwd>
<kwd lng="pt"><![CDATA[logística hospitalar]]></kwd>
<kwd lng="pt"><![CDATA[localização da ambulância]]></kwd>
<kwd lng="pt"><![CDATA[modelos matemáticos]]></kwd>
<kwd lng="pt"><![CDATA[programação linear]]></kwd>
</kwd-group>
</article-meta>
</front><back>
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