Agenda for DTS Meeting, 22 Jun 05 ================================= Schedule Leave 4:45PM. Admin AWIS schedule [attached] Samri W.i.S. page Web pages PROJECTS 3D Printing & Geometric Models ============================== New powder arrived Print: Thurs or Friday? daVinci models: Work on thinning Need ideas Is only way to start over? Kepler punch bowl [attached] *small* model, w/o thinning. D-Forms ======= Ribbon curves question Two circular arcs: NOT a ribbon curve So: Not all curves are ribbon curves! ...but, curve has 2nd-order discontinuity [attached] New question: Is every curve w continuous 2nd deriv (C^2) a ribbon curve? Pop-Up Books ============ Rotary animation, V-fold in mountain crease of parallel fold Angle of rotation successfully computed (indeed nonlinear) Mma animation POV-ray animation of V-fold in valley crease, transparent plane Will need examples of how to use rotary motion in a card: Sun/moon rising over house? Car/train wheels? Protein Folding =============== Painted backbone Bond angles? Remake sphere model with new powder, ~6 inches long Interlocked Chains ================== Photos of 11/2-chain Build new 60-deg (equilateral triangle) weaving Brace last two angles at ~60 deg {Build 108-deg (regular pentagon) weaving -- only if time avial} K'nex-like mechanism at angles between 60-90 John's improved universal joint?