Contents

User:JocK

I participate in WikiProject Contract bridge, WikiProject Board and Table Games, WikiProject Mathematics, and WikiProject Physics.

In order of creation. The bold titles refer to contributions that have escaped 'stub-status':

Rubensohl, Muiderberg convention, Lionel convention, Crash (convention), Gardener 1NT, Raptor convention, Ghestem, Par contract (redirected), Bep Vriend , Berry Westra, Overcall, Suit combinations, Pass-or-correct bid, Bauke Muller, BBGKY hierarchy, Green, Herbert (redirected), Arnold's cat map, Gingerbreadman map, Area-preserving maps (redirected), Last Train, Fred Gitelman, Jeff Rubens, Geir Helgemo, Blotto games, Conway puzzle, Slothouber-Graatsma puzzle, Conway sequence, Heronian mean, Forcing bid, Fourth suit forcing convention (redirected), Forcing pass, Principle of fast arrival, Bergen raises, Reverse bid (redirected), Bridge magazines, Grosvenor gambit, Archie's law, Bedlam cube, Fulvio Fantoni, Claudio Nunes, Fantunes, Piotr Gawrys, Jacek Pszczola, Michal Kwiecien, Adam Zmudzinski, Leaping Michaels, World Team Olympiad, World Open Pairs Championship, World Bridge Championships, World Mixed Pairs Championship, Romex system, Bridge probabilities, Tempo (bridge), Suit combinations - T missing, Suit combinations - J missing, Suit combinations - KT missing, Three suiter, Balanced hand, Boring club, Single suiter, Ekren convention, Computer bridge, Kit Woolsey, Philip Vischjager, Balancing (bridge), Pierre Ghestem, John R. Crawford, List of all-rounders in games of skill, Backgammon opening theory, Backgammon glossary (moved to: http://en.wiktionary.org/wiki/Transwiki:Backgammon_glossary), Backgammon notation, Bill Robertie, Billy Eisenberg, Heinz mean, Penney's game, Jimmy Fricke, Comfy Canapé, Subtract a square, Grundy's game, Nontransitive game, Traveler's dilemma, Volunteer's dilemma, Kobon triangle problem, Moving sofa problem, Robbins constant, Mike Cappelletti, Richard Hutten, Kunsthal, Frits Goldschmeding, Princess and monster game, Centraal Museum, List of Dutch by net worth, Narayana number, Klaus-Michael Kühne, Gerrit Krol, P.C. Hooft Award, Bunyakovsky conjecture, Erdős–Anning theorem, Erdős-Diophantine graph, Rubens advances, Wereldhave, Feynman checkerboard, Kepler triangle, Surface of constant width, Bicone, Almost integer, Chicken McNuggets problem (merged into Coin problem), Nonhypotenuse number, Norman four notrump, San Francisco convention, Jorge Pan, Rolf Slotboom, Hans Melchers, Milheeze, Ouzo effect, Namyats, Willem Abraham Wythoff, Quantum pseudo-telepathy, Horsepower-hour, Edwin F. Taylor, Theodore Jacobson

Some Wikipedia editors seem to take the No original research policy to a next level. According to them, any results obtained with a computer program and not published in the open literature, should not appear in Wikipedia. That also holds true for results obtained with a computer program extensively verified against results that are published.^[1] As a consequence of this OR-fundamentalism, I had to stop the project Suit Combinations. Most likely, the various articles containing tables of suit combinations (see e.g. Suit combinations - K10 missing) will disappear. I will try to safeguard the main article Suit combinations, but currently it seems that even this article is under attack.

Personally, I strongly feel that the group of OR-fundamentalists are losing sight of the original intentions^[2] of the no-OR policy, and are pushing Wikipidia in a wrong direction. However, I don't have the time nor the energy to keep combatting this. Let's see how thing develop. JocK 20:26, 28 April 2007 (UTC)

• ... that a bridge-playing robot managed to defeat two reigning European bridge champions?
• ... that the opening theory of backgammon underwent profound changes after self-teaching robots were analyzed playing the game?
• ... that upon McDonald's introduction of chicken McNuggets one could purchase any amount above 43, but not 43?
• ... that in recent years the alcoholic beverage ouzo has been subject of intense scientific study?
• ... that due to the subtly non-local nature of quantum reality, apparent telepathy can be achieved in games between separated players ?
• ... that the preceding DYK - whilst on Wikipedia's Main page - was viewed on average once every 6 seconds?
• ... that you don't need to go through the hassle of writing a featured article to get a reference on Wikipedia's Main page?

On31 July, 2006, Did you know? on Wikipedia's Main Page was updated with a fact from the article Computer bridge, which I created.

On7 August, 2006, Did you know? on Wikipedia's Main Page was updated with a fact from the article Backgammon opening theory, which I created.

On2 february, 2008, Did you know? on Wikipedia's Main Page was updated with a fact from the article Ouzo effect, which I created.

On4 December, 2008, Did you know? was updated with a fact from the article Quantum pseudo-telepathy, which I created.

And did you know ... that you can also suggest interesting facts from recently created articles?

An excellent essay on the history of Wikipedia, and how Wikipedia captures history: Roy Rosenzweig in The Journal of American History, Vol. 93, Number 1 (June, 2006), p. 117-46.

• User:Rocchini : Lots of beautiful math-related graphics. I like his moving sofa animation!

• User:Oleg Alexandrov/Pictures : Some more nice math graphics.

• User:JasonHise : Animated 4D graphics.

• User:Tetracube : More 4D stuff.

• User:Michael Hardy : Originator of many great articles on math.

• User:Tomruen : A page with thought-provocative graphs.

• User:Cyp : Some more polyhedra. More interestingly, Cyp also appears to be the creator of two beautiful animations on Galilean and Lorentz transformations - see animations to the left and right:

Vertical direction indicates time. Horizontal indicates distance (only one spatial dimension is taken into account), and the thick dashed line is the spacetime trajectory ("world line") of the observer. The small dots indicate specific (past and future) events in spacetime.

The slope of the world line (deviation from being vertical) gives the relative velocity to the observer. Note how in both pictures the view of spacetime changes when the observer accelerates. In the Newtonian description these changes are such that time is absolute: the movements of the observer do not influence whether an event occurs in the 'now' (i.e. whether an event passes the horizontal line through the observer). However, in the relativistic description the observability of events is absolute: the movements of the observer do not influence whether an event passes the light cone of the observer. Notice that with the change from a Newtonian to a relativistic description, absolute time is no longer applicable: events move up-and-down in the figure depending on the acceleration of the observer.

• User:Fred Hsu Another stunning animation: a dynamic random dot autostereogram. (Have a look yourself: http://en.wikipedia.org/wiki/Image:Stereogram_Tut_Animated_Shark.gif)

I've worked and lived in Europe, Asia, Africa and North America. Including visits and holidays, I have been to 34 nations spread over the same four continents:

As part of my Wikipedia activities, I try to expand (or create) Wikipedia articles pertaining to the countries I visited.

JocK enjoys playing bridge.

JocK comes from the Netherlands.

This user is a physicist.

This user wastes far too much time editing Wikipedia.

This user participatesin WikiProject Contract bridge.

This user enjoys playing poker.

My contributions