User:Slashme

File:DavidBWpassport.JPG

David Richfield

I am David Richfield, a German chemical engineer / biochemist born in South Africa. I'm also a founder member and former director of Wikimedia South Africa, the South African Wikimedia Chapter. I also created the parliament diagram tool, which is widely used to create diagrams for political articles on Wikipedia.

My username comes from IRC: "/me" is a shortcut which inserts your username.

I enjoy learning languages, graphic design, 3D modeling with Blender, cartography on OpenStreetMap, computer programming, playing Go and promoting free software. In 2016, I started juggling.

Here's a Limerick: $\underset{1}{\overset{\sqrt[3]{3}}{\int }}{t}^{2}dt\cos (\frac{3\pi }{9})=\ln (\sqrt[3]{e})$

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Activity

Parliament diagram tool

• Schematic diagram of the House of Lords, showing government, opposition, cross-bench and speaker
  Schematic diagram of the House of Lords, showing government, opposition, cross-bench and speaker
• Arch version
  Arch version
• Another arch
  Another arch

You can make diagrams using this online tool!

I started work a while back on a tool to render svg diagrams for legislatures - I started out with a tool that spits out a rectangular diagram with a title and a legend. In May 2010, I saw some very nice arch-shaped diagrams drawn with User:Habbit's ADSvote program requested for conversion to SVG on WP:GL/I. Instead of doing manual SVG conversion, I programmed a similar algorithm, which I now host on Wikimedia's Toolserver (link above). The source code is hosted at GitHub - Bug reports, feature requests and patches are welcome!

The arch tool is quite popular for election results on Wikipedia, but the Westminster-style tool is still under development: a standard style has not yet been clarified, so if you use it, expect criticism and/or correction. If the output is not as you expect, consider editing with Inkscape and saving the result as a "plain SVG".

You can also upload the diagrams directly from the tool. You can see the most recent uploads here.

There have been significant contributions to the tool by Ambady Anand S, Ranjith Siji, and Rade-Mathis.

Pages I started

Don't start what you can't finish.

Translations

• Blendax
• Ingelheimer Aue
• Panagia Episkopi
• Ernst Schulze (chemist)
• Nick Sloane (salvage expert)
• Grand Central Water Tower Midrand
• Francis Augustus Silva
• Octanol-water partition coefficient
• Sheila Sisulu

Some pictures and animations I've contributed

Here are some selected files. For a more complete list, with many more pictures, see my Commons uploads (or if you have javascript enabled, you can see them in a gallery view)

• A small sample of boleite photographed at the Museum Reich der Kristalle in Munich.
  A small sample of boleite photographed at the Museum Reich der Kristalle in Munich.
• The main steroidogenic pathways. I made the first version of the svg from scratch; expanded, coloured and successfully shepherded through the featured pictures process by User:Mikael_Häggström.
  The main steroidogenic pathways. I made the first version of the svg from scratch; expanded, coloured and successfully shepherded through the featured pictures process by User:Mikael_Häggström.
• The compression action of a Rotary-screw compressor
  The compression action of a Rotary-screw compressor
• 3D structure of promin - was used as the illustration on WP:DYK
  3D structure of promin - was used as the illustration on WP:DYK
• A W-type external-thread collet being pulled into its spindle seat with a drawbar, clamping and then releasing a shaft.
  A W-type external-thread collet being pulled into its spindle seat with a drawbar, clamping and then releasing a shaft.
• Life cycle of Echinococcus
  Life cycle of Echinococcus
• Lots of thumbtacks, just for fun!
  Lots of thumbtacks, just for fun!
• An old Cadmach tablet press
  An old Cadmach tablet press
• Round, biconvex white tablets
  Round, biconvex white tablets
• Tablet failure modes
  Tablet failure modes
• An empty pycnometer
  An empty pycnometer
• A full pycnometer
  A full pycnometer
• Laboratory distillation set-up
  Laboratory distillation set-up
• Red and white deposited hard candy
  Red and white deposited hard candy
• Animated SVG: the rotors of a three-lobe Roots blower meshing and rotating.
  Animated SVG: the rotors of a three-lobe Roots blower meshing and rotating.
• Chlorophyll a
  Chlorophyll a
• Two snails investigate each other before mating
  Two snails investigate each other before mating
• A specimen of Duberria lutrix
  A specimen of Duberria lutrix
• Green insect eggs found on a curtain
  Green insect eggs found on a curtain
• A sundew in Jonkershoek, Stellenbosch
  A sundew in Jonkershoek, Stellenbosch
• A cockroach in Jonkershoek, Stellenbosch
  A cockroach in Jonkershoek, Stellenbosch
• The Painted Tree Frog
  The Painted Tree Frog
• Parapioxys jucundus
  Parapioxys jucundus
• The P450 catalytic cycle - thanks to User:Rob Scarrow for the correction!
  The P450 catalytic cycle - thanks to User:Rob Scarrow for the correction!
• Stress vs Strain graph: re-drawn with actual stress line added
  Stress vs Strain graph: re-drawn with actual stress line added
• Stanley Bridge in Alexandria by night during Ramadan 2009
  Stanley Bridge in Alexandria by night during Ramadan 2009
• A graffito of Riaan Cruywagen
  A graffito of Riaan Cruywagen
• An SVG icon for manufacturing company stubs
  An SVG icon for manufacturing company stubs
• Baseball stub template pic, built from parts
  Baseball stub template pic, built from parts

Tools

Camera

I bought a Canon PowerShot A630 in April 2007, and have since started contributing photos to Wikipedia. In 2008, due to an insurance payout after a stupid accident involving seawater, it was upgraded to an A650IS, quite a nice camera, and it runs chdk quite nicely, thanks! That camera was eventually stolen in 2013, and I have replaced it with an SX270HS, which has the new Digic 6 processor. There is a development CHDK version for this model, but I have not tested it yet: it is still alpha software as of November 2014. I've also since bought a Canon EOS 600D. It's a very nice camera! I have had good success with macro photography using extension tubes with the stock lens, but I later also bought a combination macro/telephoto lens.

External links

Go, Baduk, Weiqi

• List of go clubs on the web
• International map of go clubs
• The South African Go Clubs website
• The South African Go Clubs wiki
• The truth about Scientology