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| . VE Jitterbug; Tangent Toy Co Sausalito CA USA Bounce-Bak . Canada Crystal Structures 11-98 3D VRML Models; A Crowe; Institute Laue-Langevin Grenoble - France Cuboctaflex 09-98 The Orb Factory Halifax NS Canada Cuboctahedron Kit . Symmetrics, Inc Philadelphia PA USA D Delta Blocks 11-98 Octet; Hollister David . Integrity Designs; BFI sells Greenville NH USA Fast's Poly Page 11-98 Bruce Fast; University of Colorado . |
| Note that the fitting parameter p0 is not the percolation threshold pc. Finite element data and lines of best-fit to equation (4. Data for the two-cut and closed-cell models are nearly conincident. By definition, the two-cut, open-cell and closed-cell GRF models have no percolation threshold (i. p on bi-logarithmic axis (not shown) revealed a straight line for small p indicating that data for these models can be extrapolated using the equation (4. |
| Przybilla wanted a three dimensional model of some of the building-block shapes Mr. Fuller talks about, like the icosahedron, the octahedron and the tetrahedron. He built them from plastic spheres and while fiddling with the models realized that they could be spun. Well, anyway, spinning them is a nifty way to fritter away time in the office. Four tops, the three shapes above and a cuboctahedron come packed in a see-through plastic tube with a set of trading cards explaining the details of each shape in terms of faces, vertexes, etc. |