<?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>0430-5027</journal-id>
<journal-title><![CDATA[Finisterra - Revista Portuguesa de Geografia]]></journal-title>
<abbrev-journal-title><![CDATA[Finisterra]]></abbrev-journal-title>
<issn>0430-5027</issn>
<publisher>
<publisher-name><![CDATA[Centro de Estudos Geográficos]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S0430-50272010000100005</article-id>
<title-group>
<article-title xml:lang="pt"><![CDATA[Probabilidade bayesiana e regressão logística na avaliação da susceptibilidade de ocorrência de incêndios de grande magnitude]]></article-title>
<article-title xml:lang="en"><![CDATA[Bayesian probability and logistic regression in the assessment of the susceptibility to high magnitude wildfires]]></article-title>
<article-title xml:lang="fr"><![CDATA[Comparaison entre la probabilite bayesienne et la regression logistique pour l’evaluation de la susceptibilite a l’apparition d’incendies de grande magnitude]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Bergonse]]></surname>
<given-names><![CDATA[Rafaello V.]]></given-names>
</name>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Bidarra]]></surname>
<given-names><![CDATA[João M.]]></given-names>
</name>
<xref ref-type="aff" rid="A01"/>
</contrib>
</contrib-group>
<aff id="A01">
<institution><![CDATA[,IGP - Instituto Geográfico Português  ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>00</month>
<year>2010</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>00</month>
<year>2010</year>
</pub-date>
<numero>89</numero>
<fpage>79</fpage>
<lpage>104</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://scielo.pt/scielo.php?script=sci_arttext&amp;pid=S0430-50272010000100005&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://scielo.pt/scielo.php?script=sci_abstract&amp;pid=S0430-50272010000100005&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://scielo.pt/scielo.php?script=sci_pdf&amp;pid=S0430-50272010000100005&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="pt"><p><![CDATA[Este artigo tem por objectivo a aplicação de um modelo de susceptibilidade orientado para a aplicação a incêndios de grande magnitude, pequena parte do total de ocorrências que origina a grande maioria dos estragos anuais. Esta relação frequência/magnitude é característica dos regimes de fogo dos países do Sul da Europa. Com base na cartografia das áreas ardidas, no período 1990-2007 no distrito de Castelo Branco, é proposto um método de identificação dos incêndios de grande magnitude e são comparadas duas técnicas de integração de dados, assentes em Probabilidade Bayesiana e Regressão Logística. Os resultados mostram uma capacidade preditiva superior da técnica Bayesiana, e um ajustamento do modelo ao comportamento dos incêndios considerados de grande magnitude, por oposição a todos os incêndios. Embora deva ser alvo de desenvolvimentos futuros, o modelo proposto pretende complementar outras formas de avaliação da susceptibilidade/perigosidade, salientando as áreas onde tendem a concentrar-se os incêndios mais danosos.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[The aim of this paper is to apply a susceptibility model to high magnitude wildfires - with the latter defined as the small fraction of the total number of occurrences that causes most of the annual damage. This type of frequency/ magnitude relation is characteristic of wildfire regimes in southern European countries. drawing on the analysis of burnt-area maps for the period 1990-2007 in the Castelo Branco district, a wildfire classification method is put forth and a model is tested using two alternative data integration techniques: one based on Logistic Regression, the other on Bayesian probability. The results indicate that the Bayesian technique has slightly greater predictive capability and confirm that the proposed model is adjusted to the behaviour of wildfires considered to be of high magnitude. Although the suggested model may usefully undergo future improvements in order to increase its predictive capability, it can already be used to complement other forms of susceptibility/hazard analysis, by highlighting the areas that are most likely to be affected by the most destructive wildfire events.]]></p></abstract>
<abstract abstract-type="short" xml:lang="fr"><p><![CDATA[On cherche à mettre au point un modèle applicable aux incendies de grande magnitude qui, en dépit de leur rareté, causent la plus grande part des dégâts annuels. Ce rapport fréquence/ magnitude est caractéristique du régime des incendies dans l’Europe du Sud. En se basant sur la cartographie des surfaces brûlées pendant la période 1990-2007 dans le district de Castelo Branco, on propose une méthode d’identification de ces incendies, en comparant deux techniques d’intégration des données. La technique de probabilité bayésienne présente une capacité prédictive supérieure à celle de la régression logistique et permet ainsi de mieux adapter le modèle présenté à ce type d’incendies. Ce modèle devra être amélioré, mais il permet déjà de mieux évaluer le rapport susceptibilité /danger et de reconnaitre les lieux où les incendies qui causent le plus de dommages tendent à se concentrer.]]></p></abstract>
<kwd-group>
<kwd lng="pt"><![CDATA[Incêndios de grande magnitude]]></kwd>
<kwd lng="pt"><![CDATA[susceptibilidade]]></kwd>
<kwd lng="pt"><![CDATA[probabilidade bayesiana]]></kwd>
<kwd lng="pt"><![CDATA[regressão logística]]></kwd>
<kwd lng="en"><![CDATA[High magnitude wildfires]]></kwd>
<kwd lng="en"><![CDATA[susceptibility]]></kwd>
<kwd lng="en"><![CDATA[Bayesian probability]]></kwd>
<kwd lng="en"><![CDATA[logistic regression]]></kwd>
<kwd lng="fr"><![CDATA[Incendies de grande magnitude]]></kwd>
<kwd lng="fr"><![CDATA[susceptibilité]]></kwd>
<kwd lng="fr"><![CDATA[probabilité bayésienne]]></kwd>
<kwd lng="fr"><![CDATA[régression logistique]]></kwd>
</kwd-group>
</article-meta>
</front><body><![CDATA[ <p><b>Probabilidade bayesiana e regress&atilde;o log&iacute;stica na avalia&ccedil;&atilde;o da susceptibilidade de ocorr&ecirc;ncia de inc&ecirc;ndios de grande magnitude</b></p>     <p>&nbsp;</p>     <p>Rafaello V. Bergonse*, Jo&atilde;o M. Bidarra**</p>      <p>*Bolseiro de doutoramento; Centro de Estudos Geogr&aacute;ficos, IGOT. E-mail:    <a href="mailto:rafaellobergonse@gmail.com">rafaellobergonse@gmail.com</a> </p>      <p>**Instituto Geogr&aacute;fico Portugu&ecirc;s. E-mail: <a href="mailto:jmbidarra@gmail.com">jmbidarra@gmail.com</a></p>     <p>&nbsp;</p>     <p><b>RESUMO &#8211; </b>Este artigo tem por objectivo a aplica&ccedil;&atilde;o de um modelo de susceptibilidade orientado para a aplica&ccedil;&atilde;o a inc&ecirc;ndios de grande magnitude, pequena parte do total de ocorr&ecirc;ncias que origina a grande maioria dos estragos anuais. Esta rela&ccedil;&atilde;o frequ&ecirc;ncia/magnitude &eacute; caracter&iacute;stica dos regimes de fogo dos pa&iacute;ses do Sul da Europa. Com base na cartografia das &aacute;reas ardidas, no per&iacute;odo 1990-2007 no distrito de Castelo Branco, &eacute; proposto um m&eacute;todo de identifica&ccedil;&atilde;o dos inc&ecirc;ndios de grande magnitude e s&atilde;o comparadas duas t&eacute;cnicas de integra&ccedil;&atilde;o de dados, assentes em Probabilidade Bayesiana e Regress&atilde;o Log&iacute;stica. Os resultados mostram uma capacidade preditiva superior da t&eacute;cnica Bayesiana, e um ajustamento do modelo ao comportamento dos inc&ecirc;ndios considerados de grande magnitude, por oposi&ccedil;&atilde;o a todos os inc&ecirc;ndios. Embora deva ser alvo de desenvolvimentos futuros, o modelo proposto pretende complementar outras formas de avalia&ccedil;&atilde;o da susceptibilidade/perigosidade, salientando as &aacute;reas onde tendem a concentrar-se os inc&ecirc;ndios mais danosos. </p>      <p><b><i>Palavras-chave:</i></b> Inc&ecirc;ndios de grande magnitude, susceptibilidade, probabilidade bayesiana, regress&atilde;o log&iacute;stica. </p>      <p>&nbsp;</p>      <p><b>Bayesian probability and logistic regression in the assessment of the susceptibility to high magnitude wildfires. </b></p>      ]]></body>
<body><![CDATA[<p><b>ABSTRACT &#8211;</b>The aim of this paper is to apply a susceptibility model to high magnitude wildfires &#8211; with the latter defined as the small fraction of the total number of occurrences that causes most of the annual damage. This type of frequency/ magnitude relation is characteristic of wildfire regimes in southern European countries. drawing on the analysis of burnt-area maps for the period 1990-2007 in the Castelo Branco district, a wildfire classification method is put forth and a model is tested using two alternative data integration techniques: one based on Logistic Regression, the other on Bayesian probability. The results indicate that the Bayesian technique has slightly greater predictive capability and confirm that the proposed model is adjusted to the behaviour of wildfires considered to be of high magnitude. Although the suggested model may usefully undergo future improvements in order to increase its predictive capability, it can already be used to complement other forms of susceptibility/hazard analysis, by highlighting the areas that are most likely to be affected by the most destructive wildfire events.</p>      <p><b><i>Key-words: </i></b>High magnitude wildfires, susceptibility, Bayesian probability, logistic regression. </p>      <p>&nbsp;</p>      <p><b>Comparaison entre la probabilite bayesienne et la regression logistique pour l&#8217;evaluation de la susceptibilite a l&#8217;apparition d&#8217;incendies de grande magnitude. </b></p>      <p><b>RESUME </b>&#8211; On cherche &agrave; mettre au point un mod&egrave;le applicable aux incendies de grande magnitude qui, en d&eacute;pit de leur raret&eacute;, causent la plus grande part des d&eacute;g&acirc;ts annuels. Ce rapport fr&eacute;quence/ magnitude est caract&eacute;ristique du r&eacute;gime des incendies dans l&#8217;Europe du Sud. En se basant sur la cartographie des surfaces br&ucirc;l&eacute;es pendant la p&eacute;riode 1990-2007 dans le district de Castelo Branco, on propose une m&eacute;thode d&#8217;identification de ces incendies, en comparant deux techniques d&#8217;int&eacute;gration des donn&eacute;es. La technique de probabilit&eacute; bay&eacute;sienne pr&eacute;sente une capacit&eacute; pr&eacute;dictive sup&eacute;rieure &agrave; celle de la r&eacute;gression logistique et permet ainsi de mieux adapter le mod&egrave;le pr&eacute;sent&eacute; &agrave; ce type d&#8217;incendies. Ce mod&egrave;le devra &ecirc;tre am&eacute;lior&eacute;, mais il permet d&eacute;j&agrave; de mieux &eacute;valuer le rapport susceptibilit&eacute; /danger et de reconnaitre les lieux o&ugrave; les incendies qui causent le plus de dommages tendent &agrave; se concentrer. </p>      <p><b><i>Mots-cl&eacute;s</i>: </b>Incendies de grande magnitude, susceptibilit&eacute;, probabilit&eacute; bay&eacute;sienne, r&eacute;gression logistique. </p>      <p>&nbsp;</p>     <p>Texto completo disponível apenas em PDF.</p>     <p>Full text only available in PDF format.</p>     <p>&nbsp;</p>      ]]></body>
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