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Imagine a world in which every single person on the planet is given free access to the sum of all human knowledge. That's what we're doing.
This editor is a Journeyman Editor and is entitled to display this Service Badge.

The very existence of Wikipedia is proof that there are more people in the world wanting to build than to tear down. Were that not true, vandals would have overwhelmed and destroyed us years ago.

— Antandrus

I believe knowledge should be beautiful! If you need any help with diagrams just let me know and I'll see what I can do.

My main focus of work lately has been the Group Testing article, which recently passed its GA review. Next I'm hoping to take this article to featured, so any suggestions or feedback is welcome.

I am also currently recording a spoken version of the Earth article. You can find my script here.

General notes[edit]

User boxes
Wikipedia extended confirmed new.svgThis user has extended confirmed rights on the English Wikipedia. (verify)
Wikipedia Rollbacker.svgThis user has rollback and pending changes reviewer rights on the English Wikipedia. (verify)Wikipedia Reviewer.svg
2,300+This user has made over 2,300 contributions to Wikimedia projects.
Inkscape.logo.svgThis user contributes using inkscape.
Nuvola apps kfig.svgThis user is a member of Wikiproject Mathematics
Gnome-mixer-applet.svgThis user is a member of Wikiproject Spoken Wikipedia
Inkscape.svgThis user is a Wikigraphist from the Graphics lab
Postscript-viewer.svgThis user is a member of the Guild of Copy Editors
Gnome-preferences-desktop-accessibility2.svgThis user is a member of the WikiProject Accessibility
Kword.svgThis user believes that edits need useful summaries
Wikipedia-logo-v2.svgThis user believes in the right of every human being to have access to Wikipedia.
Wikipedia Library owl.svgWhy not visit the Wikipedia Library for some inspiration?
de-1Dieser Benutzer hat grundlegende Deutschkenntnisse.

Propose merge of Wythoff symbol and Wythoff construction

Links I find useful[edit]

Krinkle: Special:BlankPage/RTRC

Goals: User:Kelvin13

Planned vectorisations[edit]

Upload checklist[edit]

  • Upload image
  • (Remove SVG request / link to new version)
  • Link back to source / credit on new version
  • Update Wikipedia pages
  • Update user page


Here you can see most of the graphical work that I've uploaded to date (almost entirely SVGs) in reverse chronological order. Note that many of these are vectorisations of previous works. In these cases, click on the image to find a link to the original author. I do all my vectorisations by hand to ensure the best quality (compare this and that to see what I mean: one tenth the file size, incalculably better quality). For a full list of uploads see my upload list.

Main gallery

Total: 70

The Brews project[edit]

The Brews Project is a personal project of mine to vectorise many of the great diagrammatical contributions of Brews ohare.

SVG requests made: 99
Conversions made (✓): 23
Conversions already done (✗): 1
Currently planned (@): 1

Below is a sort of todo list I'm working my way through.

Click to show →

From user page
File:Step response for two-pole feedback amplifier.PNG
File:Conjugate poles in s-plane.PNG
File:Feedback amplifier input resistance.PNG
File:Small-signal current amplifier with feedback.PNG
File:Barrier lowering.PNG
File:MOSFET junction structure.png
File:Pole Splitting Example.png
File:Pole Splitting Example with Miller Transform.png
File:Vector field on a surface.PNG
File:Faraday's disc.PNG
File:Disc-to-strip mapping.PNG
File:Earth coordinates.PNG
File:Widlar small-signal.PNG
File:Integration Order.PNG
File:Moving coordinate system.PNG
File:Accelerating car.PNG
File:Silicon conduction band ellipsoids.JPG
File:Points of view.PNG
File:Neutron star cross-section.JPG
File:Current continuity in capacitor.JPG
File:Phase diagram for pure substance.JPG
File:Phases of Nuclear Matter.JPG
File:Matter Distribution.JPG
File:Wavelength & refractive index.JPG
File:Wavelength indeterminacy.JPG
File:Local wavelength.JPG
File:Interferometer path differences.JPG
File:Nonsinusoidal wavelength.JPG
File:Reaction path.JPG
File:Stellar aberration.JPG
File:Wedge product.JPG
File:Flank & hinge.PNG
File:Cylindrical fold.PNG
File:Advancing ramp in incompetent layers.PNG
File:Ramsay Classification.PNG
File:Volcanoes at subduction.JPG
File:Fault block mountain.JPG
File:Earth temperature.PNG
File:Speeds of seismic waves.PNG
File:S-wave velocity.PNG
File:Pythagoras for scalene triangle.PNG
File:Parallelpiped volume.PNG
File:Pythagoras 3D.PNG
File:Line elements.PNG
File:Eccentric and true anomaly.PNG
File:Tâbit ibn Qorra.PNG
File:Law of cosines.PNG
File:Pytthagoras construction.PNG
File:Parallelogram equality.PNG
File:Inertial frames.PNG
@ File:Unbalanced rotating shaft.PNG
File:Michelson interferometer with corner cubes.png
File:Reactive centrifugal force in uniform circular motion.PNG
File:Black-body realization.png
File:Idealized photosphere.png
File:MOSFET Structure.png
File:Semiconductor band-bending.png
File:Inversion with source-body bias.png
File:Two diode structures.png
File:Pn-junction zero bias.png
File:Pn-junction forward bias.png
File:Diode quasi-fermi levels.png
File:Pn-junction reverse bias.png
File:Quasi-Fermi levels.png
File:PN-diode small-signal circuit2.png
File:Modulated wave.png
File:Signal envelopes.png
File:Double-slit diffraction pattern.png
File:Phonon dispersion relations in GaAs.png
File:Electron probabilities in GaAs quantum well.png
File:Diatomic phonons.png
File:Optical & acoustic vibrations.png
File:Ontological commitments.png
File:Resource allocation.png
File:Set-point control.png
File:Regulator with feedback.png
File:Feedback op-amp voltage amplifier.png
File:Negative feedback amplifier with disturbance.png
File:Feedback topologies.png
File:Signal flow graph for feedback amplifier.png
File:Signal flow graph example.png
File:Flow graph for three linear equations.png

From elsewhere
File:Illustration to Euclid's proof of the Pythagorean theorem3.PNG
File:Euclid Corollary 5.PNG
File:Trig Functions.PNG
File:Trig Functions 2.PNG
File:Pythagoras applied to similar triangles.PNG
File:Pythagoras by similar triangles.PNG
File:Components of proper motion.JPG
File:Widlar Current Source.PNG
File:Parallelogram law.PNG
File:Rotating spheres.PNG
File:Rotating-sphere forces.PNG

Good Article reviews[edit]

A good article is an article that has passed an independent review ensuring that it is well written, verifiable, broad, neutral and if possible, illustrated. You can identify good articles by this icon: Good article, which appears in their top right corner. Below you can find a list of the good-article reviews that I've conducted, as well as the template that I use to do them.

Review Submission Date Result
Proxima Centauri b 25/02/17 Good article
Convergent evolution 20/01/17 Good article
Proxima Centauri b 20/10/16 Failed good article nominee
Rule 90 19/10/16 Good article
Burton Diamond 19/10/16 Good article

Total: 5 (P/F : 4/1)




Writing and compliance with Manual of Style[edit]

  1. Prose is clear and concise.
  2. Lead section.
  3. Layout.
  4. Words to watch.
  5. Fiction.
  6. List incorporation.

Verifiability & original Research[edit]

  1. All references presented in appropriate layout.
  2. Sources are reliable.
  3. Sources support the content.
  4. Likely-to-be-challenged information is cited.
  5. Statistics cited.
  6. No original research.
  7. No copyright violations / plagiarism.

Topic coverage[edit]

  1. Addresses main aspects of topic.
  2. Stays focused.


  1. Images present if possible.
  2. Correct copyright tags.
  3. Images relevant.
  4. Captions appropriate.


  • Neutral point of view.
  • Stable.
  • Previous review issues adequately addressed (if applicable).
  • No technical issues.

Copy edits[edit]

Vector bloom[edit]

Some say that as long as you keep dreaming, your hard work might one day bloom into something beautiful

Vector Bloom is an ongoing initiative of mine hosted once a month. The idea is to draw 10 or more diagrams (vectorisations are permitted) on a single day. Then I'll add comments on how 'the bloom' went.

Update: This initiative has been canceled. Contrary to it's original aims, Vector Bloom ended up decreasing productivity. This is because it incentivised 'saving' vectorisations for later (so I could tackle them all at once). This then created a barrier: if I wanted to do a vectorisation, I would be committing myself to doing 10, or I'd be wasting the ones I did. Anyway, I'd like to find some other way to increase my productivity in this area, but until then, I'll just be working sporadically as usual.

Bloom 1 (14/2/2017)

This bloom was dominated by 'arrow style' diagrams, and I feel like I learnt a lot about easily placing text. I finally started using one of Wikipedia's available fonts for the first time (letter placement issues be gone!). I also drew some icons that we're hoping will make it into a new Wikiproject banner template. All in all it was a pretty successful bloom, though the uploading process to a lot longer than I had anticipated.


Click to show →
Graphic Designer Barnstar Hires.png The Graphic Designer's Barnstar
For your cleaning up of my awful, awful SVGs! Headbomb {talk / contribs / physics / books} 19:24, 29 January 2017 (UTC)
Graphic Designer Barnstar Hires.png The Graphic Designer's Barnstar
For your help with Wikipedia:Graphics Lab/Illustration workshop#Icons for "Vital" articles Headbomb {talk / contribs / physics / books} 16:19, 14 February 2017 (UTC)
Graphic Designer Barnstar Hires.png The Graphic Designer's Barnstar
For your quality work on the BRFA icons! Headbomb {talk / contribs / physics / books} 00:06, 27 February 2017 (UTC)
Goce silver barnstar.png Guild of Copy Editors Leaderboard Award: Total Words, 5th Place
This Leaderboard Barnstar is awarded to CheChe for copyediting 23,962 total words during the GOCE March 2017 Backlog Elimination Drive. Congratulations, and thank you for your contributions! Miniapolis 16:07, 3 April 2017 (UTC)
Goce silver barnstar.png Guild of Copy Editors Leaderboard Award: Long Articles, 3rd Place
This Leaderboard Barnstar is awarded to CheChe for copyediting 3 long articles during the GOCE March 2017 Backlog Elimination Drive. Congratulations, and thank you for your contributions! Miniapolis 16:07, 3 April 2017 (UTC)
Goce silver barnstar.png Guild of Copy Editors Leaderboard Award: Longest Article, 3rd Place
This Leaderboard Barnstar is awarded to CheChe for copyediting one of the five longest articles – 11,856 words – during the GOCE March 2017 Backlog Elimination Drive. Congratulations, and thank you for your contributions! Miniapolis 16:07, 3 April 2017 (UTC)
CopyeditorStar7.PNG The (old school) League of Copy Editors Barnstar
This barnstar is awarded to CheChe for copy edits totaling over 30,000 words (including bonus and rollover words) during the GOCE March 2017 Backlog Elimination Drive. Congratulations, and thank you for your contributions! Miniapolis 16:07, 3 April 2017 (UTC)

Historical records[edit]

Links to information on the internal history and evolution of Wikipedia. My current task is to hoover up the primary sources in meta:Category:Wikimedia history. There are also some interesting pages in Category:Wikimedia hardware.

Secondary sources[edit]

Secondary sources are those which provide any amount of commentary or summary of events. If known/meaningful, the date of the topic under discussion is written in (round brackets), and the date at which the secondary source was written is written in [square brackets].


Timelines are chronologically ordered lists of events with minimal commentary.

Primary sources[edit]

Primary sources are direct records/logs of events as they happened with no commentary.

The following are collections of very early discussions. The dates of the discussions are difficult to ascertain, because they have all been moved at least once and many of them are from very early era Wikipedia. Additional date information can be found on their talk pages.


Indices are lists of links to primary or secondary sources without commentary (other than possibly dates) attached.