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Jan Jannink
300 followers -
My "Vanilla" Persona
My "Vanilla" Persona

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Hamming it up for that special moment in the spotlight!

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All dressed up for the Father Daughter dance!
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A very level headed look at where we are today.

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My giants are getting pretty solid after 3.5 months of gradual improvements. It's fun to see how they have changed for the better.

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Sweet video from +Don Montague and his latest design!

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I can do it all under my own power now, including the cast! I didn't really believe I'd get there, and now I can't wait until the next time I get to try again.

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I made some improvements in the last month since my first giants ever on high bar.  This time I only needed help on the cast to swing through, afterwards I was under my own power!  Thanks to +Volker Kuebler , I've learned so much, and +Sergey Brin for inspiring my goal to achieve this.

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Extreme Diving : it gets exciting at the 2 minute mark!
https://vimeo.com/76684408

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A 4 dimensional Valentine!
enjoy this beautiful & very realistic animated projection in 3D of 2 intertwining rings of the 4-dimensional 120-cell (each ring has 10 cells which are regular dodecahedra)

[the 120-cell can be partitioned into 12 disjoint 10-cell great circle rings, forming a discrete/quantized Hopf fibration. Starting with one 10-cell ring, one can place another ring alongside it that spirals around the original ring one complete revolution in ten cells. Five such 10-cell rings can be placed adjacent to the original 10-cell ring. Although the outer rings "spiral" around the inner ring (and each other), they actually have no helical torsion. They are all equivalent. The spiraling is a result of the 3-sphere curvature. The inner ring and the five outer rings now form a six ring, 60-cell solid torus. One can continue adding 10-cell rings adjacent to the previous ones, but it's more instructive to construct a second torus, disjoint from the one above, from the remaining 60 cells, that interlocks with the first. The 120-cell, like the 3-sphere, is the union of these two (Clifford) tori. If the center ring of the first torus is a meridian great circle as defined above, the center ring of the second torus is the equatorial great circle that is centered on the meridian circle. Also note that the spiraling shell of 50 cells around a center ring can be either left handed or right handed. It's just a matter of partitioning the cells in the shell differently, i.e. picking another set of disjoint great circles.]
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This morning I introduced my twins to the planets, and from 6:10 to 6:40 we watched Mercury, Venus, Saturn, Mars and Jupiter (in that order in the sky -- as per this chart from EarthSky.org). All are visible to the naked eye, but binoculars help for Mars and Mercury. My next project is to science the crap out of entrepreneurship. I'll keep you posted!
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