Archive

All articles, newest first;

2024-08-31: Writing C in 2024
2024-07-14: Contact analysis of a pin in a fixed sleeve
2024-07-14: Profiling Python scripts(6): auto-orient
2024-04-24: Building CalculiX with the PaStiX solver without CUDA
2024-04-13: Inplace editing
2024-03-10: Element names in Calculix
2024-02-11: FEA based on STEP geometry using gmsh and CalculiX
2024-01-20: Profiling with pyinstrument
2023-10-01: Folded leaf spring ball joint flexure
2023-09-24: Reading an RSS feed
2023-09-18: Creating a rectangular tube in CalculiX
2023-09-17: Meshing a circle with hex elements in CalculiX
2023-09-10: Corrugation against buckling
2023-08-09: Approximating elliptical arcs in CalculiX Graphics
2023-08-05: Hex versus tet meshes in FEA
2023-08-01: Singularities versus stress concentrations in FEA
2023-07-02: The titan implosion
2023-05-28: Testing a Basetech energy monitor 2000
2023-04-02: No AI training data here
2023-04-01: Repairing a USB flash drive
2022-11-20: Extracting glyphs from an OpenType file
2022-11-19: Building vkQuake 1.22.0 on FreeBSD
2022-11-11: From python script to executable with cython
2022-10-30: On Python speed
2022-10-28: Python 3.11 speed comparison with 3.9
2022-10-28: Writing speed on FreeBSD 13.1-p2 amd64 with ZFS
2022-10-19: FreeBSD 13.1 install on a Lenovo IdeaPad 5
2022-10-02: Getting the first or last item from a dictview without a list
2022-09-03: Resonance frequency of a composite tube
2022-05-22: Using sed
2022-04-17: Zero DSR power consumption
2022-04-17: Use pygmentize as a colorized cat
2022-03-26: Gnumeric build fix for FreeBSD
2022-02-27: Patching CalculiX Graphics to fix flipped screen hardcopy
2022-02-22: Examining an OpenSSH ECDSA public key
2022-01-30: Python & standard output redirection on ms-windows
2022-01-21: Profiling Python scripts (5): ent_without_numpy
2022-01-20: Profiling Python scripts (4): vecops.indexate
2022-01-20: Profiling Python scripts (3): stl2ps
2022-01-19: Profiling Python scripts (2): stlinfo
2022-01-18: Profiling Python scripts (1): stl2pov
2022-01-17: Simple setup.py for python scripts
2021-12-12: Merging local git repositories
2021-11-04: Simple viewer for STEP files on UNIX
2021-10-22: De-facebook your internet
2021-10-11: Installing Openstreetmap data on a Garmin zūmo 340LM
2021-10-10: Commuting on a zero DSR
2021-09-08: Using a USB headset on FreeBSD
2021-08-26: Add TeX macro around (visual) selections in Vim
2021-05-18: Does repeated JPEG conversion reduce quality?
2021-05-01: Why can’t a piece of software be finished?
2021-03-15: Decoding temperature data logger files
2021-03-07: Building an epub from a single ReStructuredText file
2021-01-29: Continuum properties of aluminium honeycomb
2020-12-31: Switching to SSH keys for github
2020-12-30: Making ringtones with free software tools
2020-11-21: Automating CalculiX with make(1)
2020-11-16: Mooney-Rivlin rubber data for CalculiX
2020-11-14: FEA with Calculix (3)
2020-11-13: FEA with Calculix (2)
2020-11-12: FEA with Calculix (1)
2020-11-11: Why I think engineers should be programmers
2020-11-10: Engineering category
2020-11-08: Opening vim in a new terminal
2020-08-06: Buildworld benchmark on my new workstation
2020-07-25: Writing speed on FreeBSD 12.1-STABLE amd64
2020-07-12: Playing a sound when the battery is low
2020-07-09: Xinput settings for Kensington Expert Mouse
2020-07-09: Xinput settings for Synaptics TouchPad
2020-07-05: Cleaning up old port configurations
2020-07-05: Opencascade problem
2020-05-10: Generating barcodes with “BWIPP”
2020-04-20: On the nature of GUI programs
2020-03-29: Have Python log to syslog
2020-03-22: Command-line versus GUI program
2020-03-22: Creating a screenshot in X11
2020-03-21: How convenient is multithreading compared to multiprocessing?
2020-02-29: Roll back a FreeBSD port with svnlite
2019-11-24: Including binary data in Python scripts
2019-09-08: Testing compression speed and ratio
2019-08-20: My e-mail setup
2019-08-01: Luminous clouds
2019-07-28: A simple feed reader for Youtube
2019-07-24: Switching vim to use native package management
2019-07-07: Formatting a USB stick on FreeBSD
2019-07-03: Attempting a conky replacement in Python (part 2)
2019-07-01: Attempting a conky replacement in Python (part 1)
2019-06-17: Setting the Razer ornata chroma color from userspace
2019-06-11: Automating package updates on FreeBSD
2019-05-29: Nikon D70s tips and tricks
2019-01-29: Adding text or graphics to a PDF file (again)
2019-01-27: ImageMagick: convert vs Wand
2018-11-24: Installing Pelican 4
2018-11-18: Creating a nomogram with Python and Postscript
2018-08-05: Disable firefox DNS
2018-08-02: Building ports with local modifications
2018-07-29: Drawing with PostScript
2018-06-24: TeXLive 2018 update
2018-04-22: Using the FT232 with Python
2018-04-13: Measuring particulate matter with the PMS5003
2018-04-13: Storing and graphing time-based data
2018-03-24: Yes, please: #DeleteFacebook. But don’t leave it at that.
2018-03-08: Video manipulation with ffmpeg
2018-03-04: Adding an overlay to each page of a pdf file
2018-01-28: Install ntpsec on FreeBSD
2017-12-16: Transplanting noscript settings and bookmarks to another machine
2017-11-19: Using sqlite3 for time management
2017-09-12: Database scheme for resin recipes
2017-08-13: Converting RCS history to git
2017-07-16: Compiling asymptote for TeXLive on FreeBSD
2017-07-09: Doing calculations with Python
2017-06-06: Improving my Python coding
2017-06-03: Structures in Python
2017-05-21: State machines in Python
2017-05-13: Fixing dependencies after mesa ports consolidation
2017-04-18: Building gphoto2-ffi on FreeBSD
2017-03-07: Evaluating Zstandard compression
2017-02-07: Removing big files from git history
2017-02-05: Using gnuplot from Python
2017-01-07: Comparing stock ffmpeg with optimized ffmpeg
2016-12-28: PDF tricks
2016-12-25: Updating python3 to 3.6
2016-11-25: Chrome versus Firefox
2016-11-13: Adding text or graphics to a PDF file
2016-08-12: Thermen museum, Heerlen
2016-07-24: Installing asymptote 2.38 in TeXLive 2016
2016-07-05: In programming, small and simple is beautiful
2016-06-28: Parallel execution with Python
2016-06-21: Replacing openssl with libressl for ports
2016-05-19: Reading xlsx files with Python
2016-04-23: Finding your own files, fast
2016-01-10: Adding scale markers to a scanned image
2016-01-09: Using a scanner for macro photography
2015-09-20: Extracting data from XML with regular expressions
2015-09-14: Updating Python to 3.5
2015-08-29: Python bindings for libmagic
2015-08-26: Design for manufacture
2015-08-11: Windows 8: the infinite yak-shaving
2015-08-08: Using a Sony PRS-T2N e-reader with FreeBSD
2015-08-05: Checking links with linklint
2015-08-03: Computer control, mature nor secure?
2015-08-03: SHA256 in pure Python
2015-05-25: img4latex
2015-05-25: Modifying pelican
2015-05-14: Making a subset of a git repository
2015-05-14: Moving scripts to a private repo
2015-02-01: Writing the README first
2014-12-28: Managing configuration files with ‘deploy’
2014-12-27: Opening files from the command line
2014-12-25: Updating the site generator “pelican” to 3.5.0
2014-12-21: Updating FreeBSD from source
2014-12-07: Switching IPython to Python 3
2014-11-26: Making saline solution
2014-08-23: Modifying a FreeBSD port
2014-07-20: TeXcalc
2014-06-14: Stltools
2014-06-08: Generate random passwords
2014-06-08: Repairing a color laserjet 2550
2014-06-06: Installing OpenProject on FreeBSD
2014-06-01: Installing asymptote 2.35 in TeXLive 2015
2014-05-30: Preventing the ~/Desktop direcory
2014-04-27: Keyword expansion with git
2014-04-01: Initializing a new git repo for a project
2014-03-30: Setting the terminal title with urxvt and tcsh
2014-03-09: Enjoying the sunshine
2014-03-02: New Zealand 2013/2014: favorite pictures
2014-02-15: Python number conversions
2013-12-28: Daal
2013-12-22: Travel in New Zealand
2013-12-22: Travel to New Zealand
2013-11-24: vid2mkv
2013-11-24: vid2mp4
2013-11-17: Laptop repair
2013-11-17: Using Matroška containers for videos
2013-08-19: genbackup
2013-08-17: Switching to the vim editor
2013-08-11: Chickpea and vegetables stew
2013-06-10: Making my first e-book
2013-06-09: Sony Reader review
2013-05-12: Filtering a sound recording
2013-03-08: Automated local backups
2013-03-08: Updating multiple systems using a pre-built FreeBSD
2013-03-07: Should system backups be compressed?
2013-03-06: Fixing squeaky bicycle disk brakes
2013-03-06: Updating to FreeBSD 9.1-RELEASE-p1
2013-03-01: Making a composite plug or mould
2013-01-15: Cycling in the snow
2013-01-04: Headphone repair
2013-01-04: Potato wedges from the oven
2012-12-31: Nginx webserver setup
2012-12-24: foto4lb
2012-12-24: make-mp3
2012-12-23: gitdates
2012-12-23: Recipe for “hutspot” (Dutch carrot and onion stew)
2012-12-22: dicom2png
2012-12-22: git-check-all
2012-12-22: make-flac
2012-12-22: markphotos
2012-12-22: tifftopdf
2012-12-10: Sandwich floor panel for a bus
2012-11-20: Rear floor for a bus
2012-10-21: Formatting git changelogs for LaTeX
2012-10-14: Evaluating REACH
2012-10-14: The design of this website
2012-08-31: csv2tbl
2012-08-30: Rösti with vegetables
2012-08-02: Planning
2012-07-30: Switch to pelican website generator
2012-07-23: Mapping a property boundary
2012-07-22: Fun with encryption and randomness
2012-07-15: GHS labels in LaTeX
2012-07-14: dxftools
2012-07-08: Writing speed on FreeBSD 9-RELEASE-p3 amd64
2012-06-04: py-stl / stl2pov
2011-11-27: lamprop
2011-11-13: An autumn commute
2011-10-02: Riding a pair of Scorpion Trikes
2011-08-18: Business trip to Shanghai
2011-04-13: A new STL convertor added
2011-04-10: stl2pov rewrite
2011-03-28: Learning Python
2010-12-18: Scorpion trike modifications
2010-12-04: Scorpion recumbent trike
2010-10-31: About personality traits
2010-10-16: Unicode characters
2010-10-12: Additional close-up photos
2010-10-10: Surface energy
2010-08-29: Backups
2010-08-28: Converting PostScript and PDF images to SVG format
2010-08-22: Writing speed on FreeBSD 8.1-RELEASE amd64
2010-08-13: Managing configuration files
2010-08-13: Using encryption
2010-08-12: Installing Plone via the unified installer
2010-08-12: Me at work
2010-08-10: Using nullfs and unionfs for the ports tree in a jail
2010-07-28: Making Ex Libris booklabels
2010-07-28: XZ compression
2010-07-25: Updating to FreeBSD 8.1-RELEASE
2010-07-06: Enlarging networking buffers
2010-06-21: Defining command completions for tcsh
2010-05-09: Creating a virtual server on FreeBSD with a jail
2010-05-09: Using the rc scripts to start a virtual server in a jail
2010-05-01: Breaking and repairing Xorg
2010-04-25: Downloading photos from a Canon digital IXUS 970 IS
2010-04-14: Visit to the JEC in Paris
2010-02-28: Typesetting
2010-02-04: Improving the rocket stove
2010-01-27: Tensegrity bridge design
2010-01-11: Cycling versus driving a car in 2009
2010-01-05: Alternative power
2010-01-02: Free software source video encoding with Ogg Theora and Vorbis
2009-01-17: rrm
2005-04-24: onepad
2004-12-08: Making a PDF from scanned B/W pages
2004-03-14: European labels for chemicals
2003-11-16: Printing labels with LaTeX
2003-02-08: Symbols for labeling chemicals