Jonas Wagner's personal page: about me, projects, travel blog, and more.https://blog.purpureus.net/https://blog.purpureus.net/posts/toki-pona-a-review/https://blog.purpureus.net/posts/toki-pona-a-review/A review of Toki Pona, the minimal constructed language. Fri, 24 Oct 2025 11:00:00 GMThttps://blog.purpureus.net/posts/ma-pona-lon-poka-pi-telo-anpa/https://blog.purpureus.net/posts/ma-pona-lon-poka-pi-telo-anpa/ma pona ni li lon ala lipu ma. jan pi mute lili li sona e ona. Wed, 05 Mar 2025 17:00:00 GMThttps://blog.purpureus.net/posts/bayesian-reasoning-on-maps/https://blog.purpureus.net/posts/bayesian-reasoning-on-maps/An intuitive explanation of Bayesian Reasoning, with an application to the Rootclaim debate on the origins of COVID-19. Sat, 22 Feb 2025 10:00:00 GMThttps://blog.purpureus.net/posts/sankt-martin/https://blog.purpureus.net/posts/sankt-martin/Gehe hin und rette Leben! Thu, 14 Nov 2024 23:00:00 GMThttps://blog.purpureus.net/posts/personal-key-rotation-4-shiny-new-passwords/https://blog.purpureus.net/posts/personal-key-rotation-4-shiny-new-passwords/An easy and secure guide to perform your own personal key rotation and get well-protected accounts. Sun, 01 Sep 2024 21:00:00 GMThttps://blog.purpureus.net/posts/personal-key-rotation-3-tools-for-key-management/https://blog.purpureus.net/posts/personal-key-rotation-3-tools-for-key-management/Two key tools for keys: a password safe, and psst secret sharing. Sun, 25 Aug 2024 21:00:00 GMThttps://blog.purpureus.net/posts/personal-key-rotation-2-security-and-availability/https://blog.purpureus.net/posts/personal-key-rotation-2-security-and-availability/Let's analyze our asset graph and find the right security/availability trade-off for our assets. Sun, 18 Aug 2024 21:00:00 GMThttps://blog.purpureus.net/posts/fuss-fuzzing-on-a-shoestring/https://blog.purpureus.net/posts/fuss-fuzzing-on-a-shoestring/FUSS speeds up fuzz testing using the elastic instrumentation technique. The source code is now freely available. Mon, 12 Aug 2024 11:00:00 GMThttps://blog.purpureus.net/posts/personal-key-rotation-1-visualize-your-assets/https://blog.purpureus.net/posts/personal-key-rotation-1-visualize-your-assets/How to visualize your assets and gain an overview of your online identity. Sun, 11 Aug 2024 19:00:00 GMThttps://blog.purpureus.net/posts/monsuta-li-moli-e-jan-500m-li-pini/https://blog.purpureus.net/posts/monsuta-li-moli-e-jan-500m-li-pini/The history of smallpox elimination, translated into Toki Pona. Sat, 30 Mar 2024 14:00:00 GMThttps://blog.purpureus.net/posts/a-name-for-every-place/https://blog.purpureus.net/posts/a-name-for-every-place/Request for comments: How to ensure that every place on earth gets an authoritative, well-known name? Thu, 13 Jul 2023 23:00:00 GMThttps://blog.purpureus.net/posts/how-to-work-in-germany-for-a-foreign-organization/https://blog.purpureus.net/posts/how-to-work-in-germany-for-a-foreign-organization/How to be an employee in Germany if your organization is based elsewhere. With checklists for social security, taxes, etc.Mon, 15 May 2023 14:15:00 GMThttps://blog.purpureus.net/posts/was-kopf-hand-und-herz-bewegt/https://blog.purpureus.net/posts/was-kopf-hand-und-herz-bewegt/Drei Highlights fürs Jahr 2020: HPMOR, vegane Ernährung und Giving What We Can. Sun, 29 Mar 2020 00:00:00 GMThttps://blog.purpureus.net/posts/deciding-fast-and-slow/https://blog.purpureus.net/posts/deciding-fast-and-slow/Reflecting on the amount of thought that goes into a decision.Sun, 23 Feb 2020 00:00:00 GMThttps://blog.purpureus.net/posts/remembering-the-windfish-tune/https://blog.purpureus.net/posts/remembering-the-windfish-tune/Reflections on Ready, Player One. The value of one's memories.Sat, 24 Nov 2018 00:00:00 GMThttps://blog.purpureus.net/posts/searching-for-numbers-and-finding-god/https://blog.purpureus.net/posts/searching-for-numbers-and-finding-god/A guest post for allthingsnew.tech. Surprising links between Theology and Turing machines.Wed, 21 Nov 2018 00:00:00 GMThttps://blog.purpureus.net/posts/resolved-to-live-thoughts-on-rogue-one/https://blog.purpureus.net/posts/resolved-to-live-thoughts-on-rogue-one/Resolved, after seeing Rogue One, to live more intentionally. To devote more attention to the purpose of what I'm doing. To do more of the things I like. Mon, 10 Jul 2017 00:00:00 GMThttps://blog.purpureus.net/posts/freshly-roasted-chestnuts-from-the-biolite-campstove/https://blog.purpureus.net/posts/freshly-roasted-chestnuts-from-the-biolite-campstove/The Biolite campstove: a review. Using the stove to roast chestnuts and boil water, I find out how well it works. Sun, 30 Oct 2016 00:00:00 GMThttps://blog.purpureus.net/posts/a-day-in-the-life-of-jonas/https://blog.purpureus.net/posts/a-day-in-the-life-of-jonas/A few impressions of my life and work in Berkely. With six pictures and an explanation of the Cyber Grand Challenge. Mon, 18 Jul 2016 00:00:00 GMThttps://blog.purpureus.net/posts/monte-carlo-tetris-playing/https://blog.purpureus.net/posts/monte-carlo-tetris-playing/A writeup of my team's entry to 2015's International Contest in Functional Programming. Tue, 11 Aug 2015 22:30:00 GMThttps://blog.purpureus.net/posts/blackie-or-the-last-hamburger/https://blog.purpureus.net/posts/blackie-or-the-last-hamburger/This is the story of a bull called Blackie, and of how a man's life was changed by a hamburger. Fri, 24 Jul 2015 09:00:00 GMThttps://blog.purpureus.net/posts/california-extreme/https://blog.purpureus.net/posts/california-extreme/A visit to the California Extreme arcade and pinball show. Tue, 21 Jul 2015 00:30:00 GMThttps://blog.purpureus.net/posts/snow-creek-hike/https://blog.purpureus.net/posts/snow-creek-hike/Es isch Morge am 7ni. D'Sunne isch ufgange nachere wunderbare Nacht, u het mi usem Schlafsack gchutzelet. I bi im Yosemite National Park, ir Nechi vom Canyon Creek. Sun, 21 Jun 2015 07:00:00 GMThttps://blog.purpureus.net/posts/chilnualna-falls-hike/https://blog.purpureus.net/posts/chilnualna-falls-hike/Me cha Gottes Güeti ir Natur gseh. D'Sunne isch grad ufgange. I hocke ufemne Granitblock am Ufer vom Crescent Lake u gniesse die erschte Sunnestrahle... Sun, 07 Jun 2015 06:30:00 GMThttps://blog.purpureus.net/posts/flying-over-a-full-world/https://blog.purpureus.net/posts/flying-over-a-full-world/On a flight from Switzerland to San Francisco, I ponder how the land below and the world around me are changing.Wed, 22 Apr 2015 00:00:00 GMThttps://blog.purpureus.net/posts/counting-cpu-cycles/https://blog.purpureus.net/posts/counting-cpu-cycles/How to measure the time (≈ CPU cycles) needed to execute a small piece of code, using the RDTSC instruction. A little experiment. Mon, 26 Jan 2015 22:00:00 GMThttps://blog.purpureus.net/posts/exporting-notes-from-evernote-and-onenote/https://blog.purpureus.net/posts/exporting-notes-from-evernote-and-onenote/Evernote and OneNote are useful. But, can you get your data out of them if you have to? This post shows how. Thu, 04 Dec 2014 00:00:00 GMThttps://blog.purpureus.net/posts/web-technologies-for-your-cv/https://blog.purpureus.net/posts/web-technologies-for-your-cv/I really like web technologies. But... would they be appropriate for writing a CV? Fri, 21 Nov 2014 00:00:00 GMThttps://blog.purpureus.net/posts/a-travellers-diary-part-four/https://blog.purpureus.net/posts/a-travellers-diary-part-four/Part four of my trip to the Rocky Mountains: the journey concludes. Sun, 12 Oct 2014 03:31:00 GMThttps://blog.purpureus.net/posts/a-travellers-diary-part-three/https://blog.purpureus.net/posts/a-travellers-diary-part-three/Part three of my trip to the Rocky Mountains: to the park. Sun, 12 Oct 2014 01:06:00 GMThttps://blog.purpureus.net/posts/a-travellers-diary-part-two/https://blog.purpureus.net/posts/a-travellers-diary-part-two/The journey continues. My goal is the mountains. I have three days left, 120 dollars in my pocket, and a backpack. This is what freedom must feel like. Sat, 11 Oct 2014 16:15:00 GMThttps://blog.purpureus.net/posts/a-travellers-diary-part-one/https://blog.purpureus.net/posts/a-travellers-diary-part-one/Part one of my journey to the Rocky Mountains: how everything started.Sat, 11 Oct 2014 16:13:00 GMT