BEGIN:VCALENDAR VERSION:2.0 PRODID:researchseminars.org CALSCALE:GREGORIAN X-WR-CALNAME:researchseminars.org BEGIN:VEVENT SUMMARY:Joseph Löfving DTSTART:20251208T153000Z DTEND:20251208T160000Z DTSTAMP:20260423T040039Z UID:gbgphd/28 DESCRIPTION:Title: Ruben on Rails: How to Steal a World Record from Middle Schoolers\nby Joseph Löfving as part of Gothenburg PhD seminar\n\nLecture held in MVL14 .\n\nAbstract\nThe Guinness Book of World Records lists the record for fas test journey between every station on the London Underground as 17 hours\, 46 minutes and 48 seconds. Gothenburg\, being colloquially known as "Litt le London"\, of course deserves a little record of its own\, substituting the underground for the tram network. This record is—to the speaker's kn owledge—currently held by two boys in their younger teens\, who claim a time of 5 hours and 19 minutes. In this talk\, we use mathematical optimiz ation techniques and a high-performance computing cluster to crush the dre ams of these two boys and claim the record for ourselves.\n\nJoin me as I develop Ruben on Rails¹\, an algorithm that finds the fastest journey pas sing all tram stops in a given day. During the talk\, we will see advanced optimization techniques such as establishing dominance\, solving the wron g problem\, and ignoring nearly all of Hisingen—all employed in the ende avor to spend several consecutive hours on public transport "efficiently". \n\n\n\n¹Since the topic (trams) is quintessentially Gothenburgian\, it i s only fitting that the algorithm has a name in the form of a Gothenburgia n pun. Now\, one shouldn't explain their jokes\, but I am too proud of thi s one\, and it is somewhat niche\, so I'll break that rule: there is a web application framework called Ruby on Rails\, and this work was done with —and initiated by—our very own Ruben Seyer\, hence Ruben on Rails. Not that web application frameworks are at all relevant here. Anyway\, I thin k this is hilarious\, and will gladly accept compliments for my comedic ge nius in written or oral form.\n LOCATION:https://researchseminars.org/talk/gbgphd/28/ END:VEVENT END:VCALENDAR