{"id":47805,"date":"2018-04-24T12:23:44","date_gmt":"2018-04-24T10:23:44","guid":{"rendered":"https:\/\/www.helha.be\/?p=47805"},"modified":"2018-04-24T12:23:44","modified_gmt":"2018-04-24T10:23:44","slug":"fractales-a-marche-ny-a-quun","status":"publish","type":"post","link":"https:\/\/www.helha.be\/fractales-a-marche-ny-a-quun\/","title":{"rendered":"Des fractales \u00e0 la marche&#8230; il n&rsquo;y a qu&rsquo;un pas !"},"content":{"rendered":"<p>Ma\u00eetre-Assistant \u00e0 la HELHa, Fabien Buisseret \u00e9tait r\u00e9cemment l&rsquo;invit\u00e9 de l&rsquo;Acad\u00e9mie Royale des Sciences, des Lettres et des Beaux-Arts de Belgique. <\/p>\n<p>Un remarquable expos\u00e9 sur la marche humaine.<\/p>\n<p>Chez l\u2019Homme adulte, la marche bip\u00e8de est un m\u00e9canisme si parfaitement ma\u00eetris\u00e9 que son extraordinaire complexit\u00e9 pourrait passer inaper\u00e7ue. Remarquons tout d\u2019abord que, d\u2019un point de vue strictement m\u00e9canique, la dynamique de la marche s\u2019apparente \u00e0 celle d\u2019un pendule invers\u00e9, soit un syst\u00e8me que, d\u00e8s l\u2019enfance, nous avons appris \u00e0 stabiliser dans le cadre d\u2019un mouvement quasi-p\u00e9riodique. C\u2019est pourquoi derri\u00e8re l\u2019activit\u00e9 \u00ab marcher \u00bb sont impliqu\u00e9s les syst\u00e8mes nerveux central et p\u00e9riph\u00e9rique ainsi que le syst\u00e8me locomoteur. <\/p>\n<p>Au-del\u00e0 d\u2019un int\u00e9r\u00eat intrins\u00e8que, l\u2019\u00e9tude de la marche ouvre des portes vers des domaines tels que la robotique : il est en effet difficile de concevoir des robots humano\u00efdes sans avoir identifi\u00e9 les conditions n\u00e9cessaires d\u2019une marche bip\u00e8de stable. <\/p>\n<p>La th\u00e9matique centrale de cet expos\u00e9 est le comportement \u00e0 long terme de la locomotion humaine. Il est aujourd\u2019hui av\u00e9r\u00e9 que la variabilit\u00e9 des param\u00e8tres de la marche &#8211; la dur\u00e9e d\u2019un pas par exemple &#8211; n\u2019est nullement al\u00e9atoire mais d\u00e9coule plut\u00f4t d\u2019une dynamique chaotique. Puisque les fractales elles-m\u00eames \u00e9mergent de syst\u00e8mes chaotiques, nous montrerons comment l\u2019utilisation d\u2019indices math\u00e9matiques quantifiant les propri\u00e9t\u00e9s fractales d\u2019une courbe permet de caract\u00e9riser de mani\u00e8re in\u00e9dite la marche humaine, voire d\u2019identifier diff\u00e9rents types de marches pathologiques !<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Ma\u00eetre-Assistant \u00e0 la HELHa, Fabien Buisseret \u00e9tait r\u00e9cemment l&rsquo;invit\u00e9 de l&rsquo;Acad\u00e9mie Royale des Sciences, des Lettres et des Beaux-Arts de Belgique. Un remarquable expos\u00e9 sur la marche humaine. Chez l\u2019Homme adulte, la marche bip\u00e8de est un m\u00e9canisme si parfaitement ma\u00eetris\u00e9 que son extraordinaire complexit\u00e9 pourrait passer inaper\u00e7ue. Remarquons tout d\u2019abord que, d\u2019un point de vue [&hellip;]<\/p>\n","protected":false},"author":38,"featured_media":47807,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[1],"tags":[],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v19.11 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Des fractales \u00e0 la marche... il n&#039;y a qu&#039;un pas ! - HELHa -\u00a0Haute \u00c9cole Louvain en Hainaut<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.helha.be\/fractales-a-marche-ny-a-quun\/\" \/>\n<meta property=\"og:locale\" content=\"fr_FR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Des fractales \u00e0 la marche... il n&#039;y a qu&#039;un pas ! - HELHa -\u00a0Haute \u00c9cole Louvain en Hainaut\" \/>\n<meta property=\"og:description\" content=\"Ma\u00eetre-Assistant \u00e0 la HELHa, Fabien Buisseret \u00e9tait r\u00e9cemment l&rsquo;invit\u00e9 de l&rsquo;Acad\u00e9mie Royale des Sciences, des Lettres et des Beaux-Arts de Belgique. Un remarquable expos\u00e9 sur la marche humaine. Chez l\u2019Homme adulte, la marche bip\u00e8de est un m\u00e9canisme si parfaitement ma\u00eetris\u00e9 que son extraordinaire complexit\u00e9 pourrait passer inaper\u00e7ue. Remarquons tout d\u2019abord que, d\u2019un point de vue [&hellip;]\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.helha.be\/fractales-a-marche-ny-a-quun\/\" \/>\n<meta property=\"og:site_name\" content=\"HELHa -\u00a0Haute \u00c9cole Louvain en Hainaut\" \/>\n<meta property=\"article:publisher\" content=\"https:\/\/www.facebook.com\/helha.be\" \/>\n<meta property=\"article:published_time\" content=\"2018-04-24T10:23:44+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/www.helha.be\/app\/uploads\/2018\/04\/namur_palaisgalerie31360.jpg\" \/>\n\t<meta property=\"og:image:width\" content=\"216\" \/>\n\t<meta property=\"og:image:height\" content=\"142\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/jpeg\" \/>\n<meta name=\"author\" content=\"Emilien Cappeliez\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:creator\" content=\"@helhabe\" \/>\n<meta name=\"twitter:site\" content=\"@helhabe\" \/>\n<meta name=\"twitter:label1\" content=\"\u00c9crit par\" \/>\n\t<meta name=\"twitter:data1\" content=\"Emilien Cappeliez\" \/>\n\t<meta name=\"twitter:label2\" content=\"Dur\u00e9e de lecture est.\" \/>\n\t<meta name=\"twitter:data2\" content=\"1 minute\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\/\/www.helha.be\/fractales-a-marche-ny-a-quun\/#article\",\"isPartOf\":{\"@id\":\"https:\/\/www.helha.be\/fractales-a-marche-ny-a-quun\/\"},\"author\":{\"name\":\"Emilien Cappeliez\",\"@id\":\"https:\/\/www.helha.be\/#\/schema\/person\/ef31b3f93a8fb4582dfc1a1a1d82f41b\"},\"headline\":\"Des fractales \u00e0 la marche&#8230; il n&rsquo;y a qu&rsquo;un pas !\",\"datePublished\":\"2018-04-24T10:23:44+00:00\",\"dateModified\":\"2018-04-24T10:23:44+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\/\/www.helha.be\/fractales-a-marche-ny-a-quun\/\"},\"wordCount\":286,\"publisher\":{\"@id\":\"https:\/\/www.helha.be\/#organization\"},\"articleSection\":[\"HELHa\"],\"inLanguage\":\"fr-BE\"},{\"@type\":\"WebPage\",\"@id\":\"https:\/\/www.helha.be\/fractales-a-marche-ny-a-quun\/\",\"url\":\"https:\/\/www.helha.be\/fractales-a-marche-ny-a-quun\/\",\"name\":\"Des fractales \u00e0 la marche... il n'y a qu'un pas ! 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- HELHa -\u00a0Haute \u00c9cole Louvain en Hainaut","robots":{"index":"index","follow":"follow","max-snippet":"max-snippet:-1","max-image-preview":"max-image-preview:large","max-video-preview":"max-video-preview:-1"},"canonical":"https:\/\/www.helha.be\/fractales-a-marche-ny-a-quun\/","og_locale":"fr_FR","og_type":"article","og_title":"Des fractales \u00e0 la marche... il n'y a qu'un pas ! - HELHa -\u00a0Haute \u00c9cole Louvain en Hainaut","og_description":"Ma\u00eetre-Assistant \u00e0 la HELHa, Fabien Buisseret \u00e9tait r\u00e9cemment l&rsquo;invit\u00e9 de l&rsquo;Acad\u00e9mie Royale des Sciences, des Lettres et des Beaux-Arts de Belgique. Un remarquable expos\u00e9 sur la marche humaine. Chez l\u2019Homme adulte, la marche bip\u00e8de est un m\u00e9canisme si parfaitement ma\u00eetris\u00e9 que son extraordinaire complexit\u00e9 pourrait passer inaper\u00e7ue. 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