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  • Re: [DNG] How to unarchive an .xz
    Overview of current (2018-10) compression algorithms.
    Mon Oct 22 13:55:56 2018 - permalink -
    - https://lists.dyne.org/lurker/message/20181020.205455.fbab5607.en.html
    compression Linux software
  • Last Resort Font EULA
    The Last Resort font is a collection of glyphs to represent types of Unicode characters. These glyphs are designed to allow users to recognize that an encoded value is one of the following:

       a specific type of Unicode character
       in the Private Use Area (no private agreement exists)
       unassigned (reserved for future assignment)
       one of the illegal character codes.

    These glyphs are used as the backup of "last resort" to any other font; if the font cannot represent any particular Unicode character, the appropriate "missing" glyph from the Last Resort font is used instead. This provides users with the ability to tell what sort of character it is, and gives them a clue as to what type of font they would need to display the characters correctly. (For more information, see The Unicode Standard, Section 5.3 Unknown and Missing Characters.)
    Ironically, it is under export control.
    Thu Oct 18 11:32:32 2018 - permalink -
    - http://www.unicode.org/policies/lastresortfont_eula.html
    font unicode
  • FreeBSD/arm/Raspberry Pi - FreeBSD Wiki
    How to install FreeBSD/ARM on computers of the Raspberry Pi family.
    Wed Oct 3 12:56:16 2018 - permalink -
    - https://wiki.freebsd.org/FreeBSD/arm/Raspberry%20Pi
    FOSS FreeBSD pi raspberry software Unix π
  • USB 2.0 9-Pin Header to Dual USB Extension Cable with Panel Mounts (Black) - modDIY.com
    Fri Sep 21 12:59:46 2018 - permalink -
    - https://www.moddiy.com/products/USB-2.0-9%252dPin-Header-to-Dual-USB-Extension-Cable-with-Panel-Mounts-%28Black%29.html?setCurrencyId=3
    electronics hardware TODO
  • GNSS 5 click - board with NEO-M8N GNSS receiver module from u-blox | MikroElektronika
    Has I2C, UART interfaces and PPS output.
    Wed Sep 19 17:07:39 2018 - permalink -
    - https://www.mikroe.com/gnss-5-click
    Galileo hardware navigation satellite
  • Nooelec - Ham It Up Plus - HF Upconverter w/ Black Enclosure, TCXO, ULF Support & Noise Source
    Found via the review
    http://www.radioforeveryone.com/2018/09/nooelec-ham-it-up-plus-upconverter.html
    Fri Sep 14 16:07:14 2018 - permalink -
    - http://www.nooelec.com/store/ham-it-up-plus.html
    hardware radio software
  • iRobot Roomba and Scooba Chat • Robot Reviews
    Interesting information about Roomba cleaning robots.
    Sat Sep 8 23:10:44 2018 - permalink -
    - http://www.robotreviews.com/chat/viewforum.php?f=1
    hardware
  • gopass is a simple but powerful password manager for your terminal.
    gopass is a rewrite of the pass password manager http://www.passwordstore.org in Go with the aim of making it cross-platform and adding additional features. Our target audience are professional developers and sysadmins (and especially teams of those) who are well versed with a command line interface. One explicit goal for this project is to make it more approachable to non-technical users. We go by the UNIX philosophy and try to do one thing and do it well, providing a stellar user experience and a sane, simple interface.
    https://www.gopass.pw
    Mon Sep 3 16:17:01 2018 - permalink -
    - https://github.com/gopasspw/gopass
    cryptography Go MIT security software TODO
  • cl-6502 - A Readable CPU Emulator
    cl-6502 is a Common Lisp emulator, assembler and disassembler for the MOS 6502 processor.
    Fri Aug 31 15:56:09 2018 - permalink -
    - https://github.com/kingcons/cl-6502
    6502 BSD common-lisp FOSS lisp literate-programming
  • Flatpak—the future of application distribution
    Flatpak is a next-generation technology for building and distributing desktop applications on Linux.
    Wed Aug 29 15:19:50 2018 - permalink -
    - https://flatpak.org/
    Linux sandbox software TODO
  • Haasoscope | Crowd Supply
    Open source USB oscilloscope, 4 channels, 125 Ms/s, 8 bit.
    Sat Aug 18 14:56:54 2018 - permalink -
    - https://www.crowdsupply.com/andy-haas/haasoscope
    electronics FOSS hardware USB
  • GitHub - unixpunk/PlutoWeb: PlutoWeb
    Collection of programs to run on the PlutoSDR, including the dunp1090 SSR ADS-B receiver, SoapyRemote and OpenWebRX. Can be programmed as image or the programs can be copied onto the PlutoSDR and ran from there.
    See also http://www.rfoverride.com/plutoweb/

    Note that shaarli could add this link on Chromium 68/Ubuntu 16.04.
    Sun Aug 5 01:03:24 2018 - permalink -
    - https://github.com/unixpunk/PlutoWeb
    radio software TODO
  • Robert Smith's repositories
    Found via computable-reals https://github.com/tarballs-are-good/computable-reals, but others such as Quickproject https://github.com/tarballs-are-good/quickproject are interesting as well.
    Mon Jul 16 14:13:46 2018 - permalink -
    - https://github.com/tarballs-are-good?tab=repositories
    common-lisp FOSS lisp software TODO
  • MCP23018 - Interface - Interface- Serial Peripherals - Microcontrollers and Processors
    16-bit bidirectional I/O port
    5.5V tolerant
    25 mA sink
    400 mA total current out
    Low standby current as low as 1 µA

    https://www.modmypi.com/raspberry-pi/iousbanalogue-expansion-1028/gpio-expansion-boards-1029/modmypi-mcp23017-hat-32-channel-io-expansion-hat uses similar chips in a DIP package.
    High-speed I²C ™ interface up to 3.4 MHz

    See also the MCP23[S]17 http://ww1.microchip.com/downloads/en/DeviceDoc/20001952C.pdf which is used in the PiDP-10
    Fri Jul 13 13:51:19 2018 - permalink -
    - https://www.microchip.com/wwwproducts/en/MCP23018
    computer electronics hardware history pi raspberry π
  • Using Optimization to Extract Roots of Real Coefficient Polynomials
    Matlab implementation of the Durand-Kerner algorithm to compute the roots of a polynomial.
    Wed Jul 11 18:24:42 2018 - permalink -
    - http://www.hpmuseum.org/forum/thread-11032-post-100258.html#pid100258
    algorithm numerical software
  • Nim programming language | Nim
    Nim is a systems and applications programming language. Statically typed and compiled, it provides unparalleled performance in an elegant package.

       High-performance garbage-collected language
       Compiles to C, C++ or JavaScript
       Produces dependency-free binaries
       Runs on Windows, macOS, Linux, and more
    Wed Jul 11 11:42:54 2018 - permalink -
    - https://nim-lang.org/
    C FOSS JavaScript language lisp MIT programming
  • Coccinelle: A Program Matching and Transformation Tool for Systems Code
    Coccinelle is a program matching and transformation engine which provides the language SmPL (Semantic Patch Language) for specifying desired matches and transformations in C code. Coccinelle was initially targeted towards performing collateral evolutions in Linux. Such evolutions comprise the changes that are needed in client code in response to evolutions in library APIs, and may include modifications such as renaming a function, adding a function argument whose value is somehow context-dependent, and reorganizing a data structure. Beyond collateral evolutions, Coccinelle is successfully used (by us and others) for finding and fixing bugs in systems code.
    Tue Jul 10 13:47:47 2018 - permalink -
    - http://coccinelle.lip6.fr/
    Linux software tool
  • Consulting in mathematics, statistics, and scientific computing
    Apart from the blog, there are technical notes https://www.johndcook.com/blog/writing/ and on-line calculators https://www.johndcook.com/blog/online-calculators/
    As an example, see Camp-Paulson normal approximation to the binomial distribution https://www.johndcook.com/blog/camp_paulson/
    The articles https://www.johndcook.com/blog/2024/04/01/more-laguerre-images/ and
    https://www.johndcook.com/blog/2024/03/22/laguerres-root-finding-method/ demonstrate the basins of attraction for Laguerre's root-finding method.
    https://www.johndcook.com/blog/2018/11/24/spheroid-distance/ should be useful for azel.
    https://www.johndcook.com/blog/2020/02/08/arenstorf-orbit/ shows a periodic solution to the restricted 3-body problem.
    https://www.johndcook.com/blog/2022/11/14/simultaneous-root-finding/ describes the Durand-Kerner polynomial root finding method.
    https://www.johndcook.com/blog/2022/11/01/kepler-newton/ discusses solving Kepler's equation

    TODO: https://www.johndcook.com/blog/2022/10/30/arctan-k-tan-t/ states "This plot looks similar to the plot of true anomaly for a highly elliptical orbit. I’m sure they’re related, but I haven’t worked out exactly how."

    https://www.johndcook.com/blog/2022/10/21/math-origins/ explains V.I. Arnolds comment
    "All mathematics is divided into three parts: cryptography (paid for by CIA, KGB and the like), hydrodynamics (supported by manufacturers of atomic submarines), and celestial mechanics (financed by military and other institutions dealing with missiles, such as NASA)."

    https://www.johndcook.com/blog/2018/09/24/riemann-hypothesis-the-fine-structure-constant-and-the-todd-function/ is about  Sir Michael Atiyah's incorrect proof of Riemann's hypothesis, the article https://rjlipton.com/2018/09/26/reading-into-atiyahs-proof/ is an interesting read. (I had bookmarked this entry on Wed Sep 26 15:51:47 2018 and put it here 2024-04-03.)

    The article https://www.johndcook.com/non_central_chi_square.pdf sounds interesting:
    John D. Cook Upper bounds on non-central chi-squared tails and truncated normal moments (2010). UT MD Anderson Cancer Center Department of Biostatistics Working Paper Series. Working Paper 62.
    Abstract. We show that moments of the truncated normal distribution provide upper bounds on the tails of the non-central chi-squared distribution, then develop upper bounds for the former.
    Mon Jul 9 11:55:42 2018 - permalink -
    - https://www.johndcook.com/blog/
    algorithm Laguerre mathematics numerical physics programming Riemann software TODO
  • BC NUMBER THEORY PROGRAMS
    Various number theoretic algrorithms written in the bc(1) programming language.
    See also the calculator program http://www.numbertheory.org/calc/krm_calc.htm from the same author.
    Fri Jul 6 09:46:48 2018 - permalink -
    - http://www.numbertheory.org/gnubc/bc_programs.html
    C mathematics programming Unix
  • Raw GNSS Measurements  |  Android Developers
    The Android Framework provides access to raw GNSS measurements on several Android devices (Android 7 or higher is needed).
    Thu Jul 5 16:47:28 2018 - permalink -
    - https://developer.android.com/guide/topics/sensors/gnss#feedback
    Android satellite-navigation software
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