The Eternal Doorman

Happy birthday Laura!!!   Subscribe to  Laura Pausini  y Camila Cabello .

  3:08 He's right, but once you know all that you should also be able to work out that most of it is needed only because the other bits are there, and there is no way that all that cruft should be running "in production". See  Artful Bytes - When to Use a RTOS . Subscribe to Plan 9 Foundation .

Subscribe to  FUTO .  If you're American you can build a 200TB NAS for your photos and backups out of trash you probably have lying around the house: Maybe FUTO will sponsor a project that allows you to contract out to be offsite backup for your friends.  Subscribe to  Level1Techs .  Or you can start downloading the whole web for your personal use,... Subscribe to  TechHut . 

My comment: That was really good, thanks. Are there any systems that can take a high-level specification of a set of tasks and compile them into machine code that implements just the necessary functionality without the overhead of code which provides the OS primitives for use by any rogue code that may have been introduced to the system somehow? I am thinking of code that just sets up interrupt handlers, DMA channels, etc. so the system can really only do the one thing it was designed to do and nothing else.  Subscribe to  Artful Bytes . 

  See McCarthy's 1960  Recursive Functions of Symbolic Expressions and Their Computation by Machine, Part I . Subscribe to Yoshiki Ohshima (大島芳樹) .  Subscribe to  Javier Livas Cantu U7 .

It would be very hard to believe the moon landings were faked once you see how much effort it took to build and run the communications systems. But you have to put in quite a bit of effort even to get a vague idea of how much effort went into restoring a working instantiation of it. See the full set of videos here:  Apollo S-band Communications System .  It's a shame people don't want to put that sort of effort into creating terrestrial communications systems for ordinary people to use. Subscribe to  Curious Marc . 

I just opened a random PDF file I got from  https://pdfobject.com/pdf/sample.pdf  in Firefox and it opened in a separate browser tab with the above URL. Then I right-clicked on the body of the displayed text and chose "Inspect" and it popped up with an HTML document. It looks like Firefox parses the PDF and builds a DOM object on the fly for each page which contains all the contents of the PDF objects in the file. If someone had told me they were planning to do this I would have said "forget it!" How do they handle embedded fonts? Do they convert them all to outlines and display them as SVG? I just would never expect two high-level formats like HTML and PDF to be inter-convertible. I would have thought they would have to translate to a common lower-level format, and then maybe there would be a class of documents you could quotient out which would be faithfully translatable at the higher level, but is that what they're doing, or does this work for anything?

He's also writing a Sci-Fi script by the sounds of it! See the video description for more information: Video supplement to some exploration into hiding information in apparently-natural patterns.  The frequency content of the ring on the left encodes ASCII characters. The shape associated with each character morphs into the next, creating the wiggly animation. You can recover the characters by performing an FFT on the x/y coordinates that describe the ring. The sound that you hear carries exactly the same information as the ring that you see, as evidenced by the scope trace in the lower left. Will add a link to an explanatory webpage once I've finished it.  Subscribe to  V. Hunter Adams .

See  The phonology of sperm whale coda vowels  and  https://www.projectceti.org/ . More links in the video description . I wonder what we would need to know before we could start communicating meaningfully with whales? Subscribe to Anton Petrov.