Agenda for DTS Meeting, 17 May 05 ================================= Schedule Normal schedule today Mechanics Keys Bldg? CS machines local password: turing (after Alan Turing) Administrative chores Any Mac users? Need to spec Mac Powerbook G4 o Options o Pricing NSF Computing Research Infrastructure grant o 3D Printer o Laser cutter o Etc. => Investigate metallic Z-printer PROJECTS 3D Printing =========== Alias Sketch -- Eric Jensen Design ball-and-socket universal joint Design fixed-angle joint, i.e., 90-deg ... Protein backbone? [attached] D-Forms ======= Mathematica tour, testing Pop-Up Books ============ Digital photographs of models Cabinet in Rm. 209, key on cylindrical bboard 1. Parallel Folds Simple parallel folds Progression from simple to more complex 3D letters Parallelograms, vector addition Path of points in space, wrt back plane of card 2. Pantograph connection 3. Angle Folds -> Rotary motion 4. Knight's visor shape Compute curve in medial plane Protein Folding =============== Locked 45-degree unit chain? Some basic geometry [attached] Seems like 90-degree unit chain cannot lock -- but why? Movie of flat-to-flat algorithm for 90-deg chains [attached]