{"id":1194,"date":"2024-12-19T08:00:00","date_gmt":"2024-12-19T07:00:00","guid":{"rendered":"https:\/\/control-advent.com\/?p=1194"},"modified":"2025-11-28T19:06:17","modified_gmt":"2025-11-28T18:06:17","slug":"19-o-curioso-caso-do-controlo-da-correia-e-dos-esquilos-gulosos-por-bolachas","status":"publish","type":"post","link":"https:\/\/control-advent.com\/?p=1194","title":{"rendered":"19 &#8211; O curioso caso do controlo da correia e dos esquilos gulosos por bolachas"},"content":{"rendered":"\n<p class=\"wp-block-paragraph\"><strong><strong><strong>Autor desta quest\u00e3o<\/strong><\/strong>:<\/strong>\u00a0Antonio Visioli,\u00a0<em>Dipartimento di Ingegneria Meccanica e Industriale,<\/em>\u00a0Universit\u00e0 degli Studi di Brescia, It\u00e1lia<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">O Pai Natal quer que os duendes tornem o processo de embrulho de presentes o mais simples e eficiente poss\u00edvel. Com esse intuito, pediu-lhes que desenvolvessem um sistema capaz de manter a correia transportadora a uma velocidade constante e ajust\u00e1vel. A velocidade da correia pode ser regulada pressionando bot\u00f5es espec\u00edficos: pressionar continuamente um bot\u00e3o azul acelera a correia, enquanto que pressionar continuamente um bot\u00e3o vermelho a desacelera. Com dois bot\u00f5es azuis duplica-se a acelera\u00e7\u00e3o obtida com apenas um bot\u00e3o azul, e o mesmo princ\u00edpio aplica-se aos bot\u00f5es vermelhos para a desacelera\u00e7\u00e3o.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Os duendes criaram uma forma engenhosa de automatizar a intera\u00e7\u00e3o com os bot\u00f5es azuis e vermelhos, envolvendo a grande comunidade de esquilos que vive na floresta ao redor da oficina do Pai Natal. A cada minuto  chega um esquilo para ajudar.  Assim, se no minuto anterior o movimento da correia transportadora tiver sido demasiado lento, o esquilo pressiona um bot\u00e3o azul. Por outro lado, se o movimento tiver sido demasiado r\u00e1pido, pressiona um bot\u00e3o vermelho. Claro que se um esquilo estiver a pressionar um bot\u00e3o azul enquanto outro estiver a pressionar um bot\u00e3o vermelho, os seus esfor\u00e7os se anulam, devendo antes regressar ambos \u00e0  floresta e descansar. <br><br>Ao analisar este sistema rec\u00e9m-desenvolvido, o Pai Natal  apercebe-se de um problema de grande monta para o qual precisa de alertar os duendes (e n\u00e3o, n\u00e3o est\u00e1 relacionado com os biscoitos extra necess\u00e1rios para manter os esquilos interessados)<\/p>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-full is-resized\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"1024\" src=\"https:\/\/control-advent.com\/wp-content\/uploads\/2024\/11\/19-Dec-2024.jpg\" alt=\"\" class=\"wp-image-433\" style=\"width:691px;height:auto\" srcset=\"https:\/\/control-advent.com\/wp-content\/uploads\/2024\/11\/19-Dec-2024.jpg 1024w, https:\/\/control-advent.com\/wp-content\/uploads\/2024\/11\/19-Dec-2024-300x300.jpg 300w, https:\/\/control-advent.com\/wp-content\/uploads\/2024\/11\/19-Dec-2024-150x150.jpg 150w, https:\/\/control-advent.com\/wp-content\/uploads\/2024\/11\/19-Dec-2024-768x768.jpg 768w, https:\/\/control-advent.com\/wp-content\/uploads\/2024\/11\/19-Dec-2024-640x640.jpg 640w, https:\/\/control-advent.com\/wp-content\/uploads\/2024\/11\/19-Dec-2024-24x24.jpg 24w, https:\/\/control-advent.com\/wp-content\/uploads\/2024\/11\/19-Dec-2024-36x36.jpg 36w, https:\/\/control-advent.com\/wp-content\/uploads\/2024\/11\/19-Dec-2024-48x48.jpg 48w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n<\/div>\n\n\n<p class=\"wp-block-paragraph\">a. \ud83d\ude80\ud83d\udcc8\u23f8\ufe0f Aten\u00e7\u00e3o! Se de repente for definida uma velocidade mais elevada, a correia transportadora poder\u00e1 acelerar descontroladamente at\u00e9 atingir a sua velocidade m\u00e1xima e ficar sempre a essa velocidade!<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">b. \u26a1\ud83c\udfa2\ud83c\udfc3\u200d\u2642\ufe0f Aten\u00e7\u00e3o! Se de repente for definida uma velocidade mais elevada, haver\u00e1 momentos em que a correia se mover\u00e1 mais rapidamente do que o desejado!<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">c. \ud83d\udc3f\ufe0f\ud83d\udca5\ud83d\udeab Aten\u00e7\u00e3o! Se for definida uma velocidade mais elevada no exato momento em que um novo esquilo aparece, o motor poder\u00e1 ficar sobrecarregado e falhar!<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">d. \ud83d\uded1\u23f3\ud83d\udcca Aten\u00e7\u00e3o! Se de repente for definida uma velocidade mais elevada, a correia pode parar completamente antes de alcan\u00e7ar a velocidade desejada!<\/p>\n\n\n<div class=\"yop-poll-container\" data-yop-poll-id=\"24\"><script type=\"application\/json\" data-yop-poll-init>{\"poll\":{\"id\":\"24\",\"name\":\"19-Dec-2024\",\"template\":\"3\",\"template_base\":\"classic\",\"skin_base\":\"red-v1\",\"status\":\"published\",\"meta_data\":{\"style\":{\"poll\":{\"backgroundColor\":\"#b70004\",\"borderSize\":0,\"borderStyle\":\"none\",\"borderColor\":\"#b70004\",\"borderRadius\":0,\"paddingLeftRight\":10,\"paddingTopBottom\":10},\"questions\":{\"paddingLeftRight\":0,\"paddingTopBottom\":10,\"textColor\":\"#ffffff\",\"textSize\":14,\"textWeight\":\"normal\",\"textAlign\":\"center\"},\"answers\":{\"paddingLeftRight\":0,\"paddingTopBottom\":0,\"textColor\":\"#ffffff\",\"textSize\":14,\"textWeight\":\"normal\",\"skin\":\"minimal\",\"colorScheme\":\"black\"},\"buttons\":{\"backgroundColor\":\"#ffffff\",\"borderSize\":1,\"borderStyle\":\"solid\",\"borderColor\":\"#000000\",\"borderRadius\":0,\"paddingLeftRight\":10,\"paddingTopBottom\":5,\"textColor\":\"#000000\",\"textSize\":14,\"textWeight\":\"normal\",\"align\":\"center\"},\"errors\":{\"borderLeftColorForSuccess\":\"#008000\",\"borderLeftColorForError\":\"#ff0000\",\"borderLeftSize\":10,\"paddingTopBottom\":0,\"textColor\":\"#000000\",\"textSize\":14,\"textWeight\":\"normal\"},\"captcha\":[],\"custom\":{\"css\":\"\"}},\"options\":{\"poll\":{\"voteButtonLabel\":\"&gt;&gt;&gt;\",\"showResultsLink\":\"no\",\"resultsLabelText\":\"Results\",\"showTotalVotes\":\"no\",\"showTotalAnswers\":\"no\",\"startDateOption\":\"now\",\"startDateCustom\":\"\",\"endDateOption\":\"never\",\"endDateCustom\":\"\",\"redirectAfterVote\":\"no\",\"redirectUrl\":\"\",\"redirectAfter\":\"\",\"pageLink\":\"\",\"useCaptcha\":\"no\",\"enableGdpr\":\"no\",\"gdprSolution\":\"ask_consent\",\"gdprConsentText\":\"\",\"loadWithAjax\":\"no\",\"notificationMessageLocation\":\"top\"},\"results\":{\"showResultsMoment\":[\"never\"],\"customDateResults\":\"\",\"showResultsTo\":[],\"resultsDetails\":[\"percentages\"],\"backToVoteOption\":\"no\",\"backToVoteCaption\":\"Back to vote\",\"sortResults\":\"as-defined\",\"sortResultsRule\":\"asc\",\"displayResultsAs\":\"bar\"},\"access\":{\"votePermissions\":[\"wordpress\"]}}}},\"elements\":[{\"id\":\"24\",\"poll_id\":\"24\",\"etext\":\"Choose an option:\",\"etype\":\"question-text\",\"status\":\"active\",\"sorder\":\"1\",\"meta_data\":{\"allowOtherAnswers\":\"no\",\"otherAnswersLabel\":\"Other\",\"addOtherAnswers\":\"no\",\"displayOtherAnswersInResults\":\"no\",\"resultsColorForOtherAnswers\":\"#000000\",\"allowMultipleAnswers\":\"no\",\"multipleAnswersMinim\":\"1\",\"multipleAnswersMaxim\":\"1\",\"answersDisplay\":\"horizontal\",\"answersColumns\":\"\",\"answersSort\":\"as-defined\"},\"subelements\":[{\"id\":\"161\",\"poll_id\":\"24\",\"element_id\":\"24\",\"stext\":\"a\",\"stype\":\"text\",\"status\":\"active\",\"sorder\":\"1\",\"meta_data\":{\"makeDefault\":\"0\",\"makeLink\":\"0\",\"link\":\"\",\"resultsColor\":\"#000000\"}},{\"id\":\"162\",\"poll_id\":\"24\",\"element_id\":\"24\",\"stext\":\"b\",\"stype\":\"text\",\"status\":\"active\",\"sorder\":\"2\",\"meta_data\":{\"makeDefault\":\"0\",\"makeLink\":\"0\",\"link\":\"\",\"resultsColor\":\"#000000\"}},{\"id\":\"163\",\"poll_id\":\"24\",\"element_id\":\"24\",\"stext\":\"c\",\"stype\":\"text\",\"status\":\"active\",\"sorder\":\"3\",\"meta_data\":{\"makeDefault\":\"0\",\"makeLink\":\"0\",\"link\":\"\",\"resultsColor\":\"#000000\"}},{\"id\":\"202\",\"poll_id\":\"24\",\"element_id\":\"24\",\"stext\":\"d\",\"stype\":\"text\",\"status\":\"active\",\"sorder\":\"4\",\"meta_data\":{\"makeDefault\":\"0\",\"makeLink\":\"0\",\"link\":\"\",\"resultsColor\":\"#000000\"}}]}],\"messages\":{\"captcha\":{\"accessibility-alt\":\"Sound icon\",\"accessibility-title\":\"Accessibility option: listen to a question and answer it!\",\"accessibility-description\":\"Type below the [STRONG]answer[\\\/STRONG] to what you hear. 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Com esse intuito, pediu-lhes que desenvolvessem &hellip; <span class=\"more-link\"><a href=\"https:\/\/control-advent.com\/?p=1194\" class=\"readmore\">Continue reading<span class=\"screen-reader-text\">19 &#8211; O curioso caso do controlo da correia e dos esquilos gulosos por bolachas<\/span><\/a><\/span><\/p>\n","protected":false},"author":4,"featured_media":433,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[91],"tags":[99],"class_list":["post-1194","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-portuguese","tag-99"],"_links":{"self":[{"href":"https:\/\/control-advent.com\/index.php?rest_route=\/wp\/v2\/posts\/1194","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/control-advent.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/control-advent.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/control-advent.com\/index.php?rest_route=\/wp\/v2\/users\/4"}],"replies":[{"embeddable":true,"href":"https:\/\/control-advent.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=1194"}],"version-history":[{"count":2,"href":"https:\/\/control-advent.com\/index.php?rest_route=\/wp\/v2\/posts\/1194\/revisions"}],"predecessor-version":[{"id":1203,"href":"https:\/\/control-advent.com\/index.php?rest_route=\/wp\/v2\/posts\/1194\/revisions\/1203"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/control-advent.com\/index.php?rest_route=\/wp\/v2\/media\/433"}],"wp:attachment":[{"href":"https:\/\/control-advent.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=1194"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/control-advent.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=1194"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/control-advent.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=1194"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}