I am a registered user since February 2010, mainly active on the German Wikipedia. Most of my contributions are related to physics.

Some pictures I created (usually for German WP articles)

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  Phase-space of the
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  through a surface element
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  Spring pendulum as an
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  Calculation of
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  of a qubit
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  Direction of
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  Wavefunction and its
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  Calculation of
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  when driving into a bend
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  when moving a box
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  Gradient of velocity for fluids
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  for a pendulum
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  Phase space of a
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  Coordinate system of