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vjoel

HN member
Joined
Mon, Apr 15, 2013, 7:22 PM UTC
HN karma
32
Public activity
25 items

About vjoel

Mathematician, rubyist, former transportation researcher, interested in distributed computation, simulation of networks of hybrid automata.

https://github.com/vjoel

@JoelVanderWerf

Recent public activity

  1. comment
    Comment #7097377

    Enjoyed playing with blocksim. Have you considered aiming for a different market than matlab/simulink? One thing that simulink cannot do well is dynamic, reconfigurable networks of…

  2. comment
    Comment #7082656

    > A programming news aggregator with better categorization than HN and less noise/navigation effort than the myriad subreddits would be a great tool. lobste.rs has tags and high si…

  3. comment
    Comment #7011119

    Love zim wiki, use it every day, but: it still doesn't detect file change on disk. So after (1) edit on host A, (2) sync with git (or rsync or btsync...), (3) go to already open ed…

  4. comment
    Comment #6913515

    What about a bonus for up-voting a story that eventually receives a high score? Or is that what you meant?

  5. comment
    Comment #6911986

    Yup. Utilite: http://utilite-computer.com/web/utilite-specifications . Dual GbE, though one is limited to around 470Mbps because of a limitation of the board. I have one. Great spe…

  6. comment
    Comment #6787122

    Where's Datomic? Maybe it's excluded because it relies on other databases as storage services?

  7. comment
    Comment #6765462

    Also, why is there a bias towards clockwise orbits in the first few seconds? Is there some asymmetry in the physics?

  8. comment
    Comment #6765384

    Took me a long time to notice that my cursor movements were injecting disturbances into the fluid. What physical laws govern these points, and how is the cursor perturbing them?

  9. comment
    Comment #6765275

    Citation needed. The Rolling Stones started in '62. Dylan's "Like a Rolling Stone" is from '65. Wikipedia attribute the band's name to the Muddy Waters song, "Rollin' Stone".

  10. comment
    Comment #6765036

    Fascinating. Is it possible to reduce the cpu utilization when idle?

  11. comment
    Comment #6752741

    Probably a reference to https://en.wikipedia.org/wiki/Multivac .

  12. comment
    Comment #6750610

    Or Julia Robinson: http://en.wikipedia.org/wiki/Julia_Robinson

  13. comment
    Comment #6750469

    These sites track new board and mini-pc releases: http://linuxgizmos.com http://www.cnx-software.com http://liliputing.com/tag/mini-pc http://www.fanlesstech.com

  14. comment
    Comment #6750415

    Especially with an encrypted disk.

  15. comment
    Comment #6750402

    There are quite a few quad-core, single-board, fanless ARM computers: utilite, wandboard, odroid, udoo, radxa. I have two odroid U2 that I use for testing distributed and multithre…

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  18. comment
    Comment #6721272

    Also: generic functions. And hygienic macros. I miss those in ruby.

  19. comment
    Comment #6648715

    Also, with encrypted volumes, just reading files on the raspi is very slow. Consider replacing raspi with odroid, utilite, or other fast, fanless, cheap arm sbc.

  20. comment
    Comment #6561894

    Or: ruby -e 'puts ARGF.sort' file.txt Also, this reads stdin if the argument is omitted.

  21. comment
    Comment #6561846

    According to http://www.rethinkdb.com/docs/architecture , you have a choice, for each read query, between C and A. The summary on meetup.com is apparently wrong. I am going to the …

  22. comment
    Comment #6548532

    Transitive closure and connected components are not expressible in first-order logic, but maybe you are thinking of Fagin's 0-1 law for finite relational models[1]: For a given fir…

  23. comment
    Comment #6512132

    I used to do a lot of scientific programming in ruby. I got around the slowness of the interpreter by generating C code on the fly. You don't have to give up Ruby as the DSL and ut…

  24. comment
    Comment #6376228

    In a big-endian glass.

  25. comment
    Comment #6271069

    In XFCE, you can move windows by pressing them against the side of the screen. Go to Settings, WindowManager, Advanced. Click "Wrap workspaces when dragging..." and choose your des…