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Synergetics Gallery: Revision History

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02Nov15 Update address on index page.
20Oct11 In Triangularly Girdled Six-fold Prism and Concentric Five-fold Prisms, reroute freewebtown link to trip.net. In Minimum of Eight Spokes, Skew Three-Prism and Octahelix, update link to Dick Fischbeck's website. In Octahelix, update link to Adrian Rossiter's website.
22Dec09 In Eight-Stage X-Module Torus, substitute a photo of the structure I assembled for the raytrace place holder. Revise the narrative a bit. In Jan Marcus' Aspension Tower, replace raytrace of the aspension canary with a photo of the model I built, changing the HTML image dimensions accordingly. In Tensegrity Tetrahedron, substitute a model photo for the raytrace of Marcelo's tetrahedron and bring the narrative up to date.
30Oct09 Add Datasheet for 3v Pars Tetra Tensegrity and link Tensegrity Tetrahedron to it.
30Sep09 Fix links in Tall Tale (San Diego, 1976) by Kenneth Snelson, Tetrahelix and the Double Tetrahelix, Skew Four-Prism and Tensegrity Arch by Maxim Schrogin. In Index, unlink bit.listserv.geodesic since the domain no longer works.
11Sep09 In Tensegrity Tetrahedron, add link to Marcelo's latest creations.
01Sep09 Add a photo of the Three-fold Fan Prism to Marcelo Pars' “drie waaiers”.
15Apr09 Add Datasheet for Three-fold Fan Prism (Two-Strut Girdle) and link Marcelo Pars' “drie waaiers” to it.
17Feb09 In Marcelo Pars' “drie waaiers,” note that “de lege stoel” is now available for viewing in the tensegrity viewers.
21Dec08 In Eight-stage Tensegrity Torus Datasheet and Four-stage Tensegrity Torus Datasheet remove hovering torus graphics to save space in Tripod.
21Nov08 In Concentric Five-fold Prisms Revisited, correct typo (squence->sequence). In Marcelo Pars' “drie waaiers,” present my design based on his concept.
03Nov08 In Index and Marcelo Pars' “drie waaiers,” note that “drie waaiers” means “three fans.” Correct a misattribution in the latter page.
01Nov08 In Index, update address of Geodesic listserv. Add Marcelo Pars' “drie waaiers”.
29Oct08 In Jan Marcus' Aspension Tower, add his latest paper and picture of cap. Remove fanciful images from Second Datasheet for Three-fold Tensegrity Prism With Orthogonal Struts and Six-stage Tensegrity Torus Datasheet to make room for new things.
17Sep08 In Eight-stage Tensegrity Arch Datasheet and Eleven-Stage X-Module Arch Datasheet, remove semi-gratuitous graphics (running out of space on Tripod).
29Aug08 In Tensegrity Prism as Joint, note the photos Kenneth Snelson sent me in response to my cubic lattice segment and the sculpture I had thought of fabricating out of it.
30Jun08 In Jan Marcus' Aspension Tower, add Aspension Arch design.
03Jun08 In Eight-Stage X-Module Torus, note that the computations and datasheet have been redone for the first version of the torus and the symmetry problems with it have been thereby fixed. In Jan Marcus' Aspension Tower, update the "Aspension Tower" label to "Aspension Tower (Marcus)" since this is the new label used by all the viewers.
02Jun08 In Jan Marcus' Aspension Tower, note date of completion of the Aspension Canary model. In Eight-Stage X-Module Torus, note date assembly was completed of the model of the first (less symmetric, more angular) version of the torus and symmetry problems with it.
22May08 In Eight-stage Tensegrity Arch, note that it's now available for perusal in all the tensegrity viewers.
19May08 In Jan Marcus' Aspension Tower, add link to tensegrity viewers for model of his structure and the Aspension Canary. Revise Datasheet for Aspension Tower II to add the "II" qualifier.
14May08 In Eight-Stage X-Module Torus, remove Fredonian photo and substitute photo of model of second version of torus for ray-trace which now is used only for the datasheet. Use this photo also for the thumb for this page. In Jan Marcus' Aspension Tower, substitute photo for raytrace for Aspension Skylon (now using version II) and add a photo for Four-fold Aspension Skylon and note date of model completion. In Two Wheels Based on Gómez Jáuregui Module, substitute photo of model of second wheel for ray trace. In Split-Level Prism, substitute photo for ray trace of split-level prism and the wishbone tensegrity. In Tensegrity Vector Equilibrium, add dimensions to all IMG tags so label access works better.
08May08 Remove basec metric member from Member Lengths listing in Datasheet for Aspension Canary.
06May08 Correct typo in HTML comment for all aspension datasheets. Add Datasheet for Aspension Canary. Add motivation for the structure to narrative in Jan Marcus' Aspension Tower.
02May08 Rescale Datasheet for X-Module Torus 1 to use 200 mm struts rather than 130 mm struts. Weighting changed to improve clearances. Add Datasheet for Four-fold Aspension Skylon.
30Apr08 Update Aspension Skylon narrative in Jan Marcus' Aspension Tower.
28Apr08 Revise Datasheet for Aspension Skylon II to be linearly tapered and eliminate an extraneous metric strut from Member Lengths.
26Apr08 Replace Datasheet for Aspension Skylon with Datasheet for Aspension Skylon II.
23Apr08 Add Datasheet for Aspension Skylon.
14Apr08 Add Datasheet for X-Module Torus 1. In Eight-Stage X-Module Torus, note date assembly was completed of second (more symmetric) version of the torus.
11Mar08 In Skew Three-Prism, Four-fold Reduced-Symmetry Prism and Skew Four-Prism, put an SGML comment at the head of every table indicating the data source. It's not visible, but it helps me find the backup data when I need to.
10Mar08 Add "Aspension Skylon" and discussion to Jan Marcus' Aspension Tower and add patent information on aspension technology.
14Feb08 In Datasheets, add an excerpt from email to Gerald de Jong on my approach to building models.
31Jan08 Add Datasheet for X-Module Torus 2.
29Jan08 In Split-Level Prism, note date of completion of the model of the Split-Level Prism with Equal-Length Struts and do some minor editing.
28Jan06 In Tetrahelix Based on A Quanta Module and The Mite, update D-Stix link.
22Jan08 In Two Wheels Based on Gómez Jáuregui Module, note special characteristics of second wheel. In Split-Level Prism, note date of completetion of Tensegrity Wishbone model and add Datasheet for Split-Level Prism with Equal-Length Struts.
16Jan08 Add link to Encylopaedia Britannica article on Goethe to Triangularly Girdled Six-fold Prism and Concentric Five-fold Prisms.
11Jan08 Add Datasheet for Wishbone Tensegrity.
03Jan08 In Two Wheels Based on Gómez Jáuregui Module, note date of completion of assembly of a model of the second wheel (New Year's Day).
31Dec07 In Split-Level Prism, mention Alan Michelson's take on chirality and the Tetrahedral Prisms.
26Dec07 In Split-Level Prism, add Split-Level Prism II and Tetrahedral Prisms; rename Diamond-Shaped Tensegrities as Diamond-Shaped Prisms and Split-Level Prism as Split-Level Prism I.
07Dec07 In Split-Level Prism, use new versions of the wishbone and diamond-shaped tensegrities.
06Dec07 Add Pinwheel Corp. link to Philip Stewart.
23Nov07 Add Dick Fischbeck's and my comments and a link to his mark up of the arch photo to Structure Based on Laminated Skew Prisms.
21Nov07 Add Split-Level Prism.
14Nov07 In Tensegrity Tetrahedron, put my name and date under my model of Snelson tetrahedron.
06Nov07 Add model photos to Tensegrity Tetrahedron, Jan Marcus' Aspension Tower, Two Wheels Based on Gómez Jáuregui Module, Structure Based on Laminated Skew Prisms and Perspective Prism. For the latter three, use the photos as icons on the index page.
02Nov07 In Tensegrity Tetrahedron, note that I completed assembly of the second version of the model of Snelson's tetrahedron the same day as formulating the datasheet. Take the notes on my modeling experience out of Datasheet for X-Module Tetrahedron and put them into Tensegrity Tetrahedron.
22Oct07 Augment Datasheet for X-Module Tetrahedron with another design using 3/16"-diameter dowels and simple nails in the ends of the struts. In Tensegrity Arch by Maxim Schrogin, update the Tilden Park link.
17Oct07 Add dedication to Beeke to Triangularly Girdled Six-fold Prism and Concentric Five-fold Prisms.
12Oct07 In Two Wheels Based on Gómez Jáuregui Module note the date I completed assembling a model of the first wheel.
25Sep07 Add Datasheet for First Wheel Based on Gómez Jáuregui Module and Datasheet for Second Wheel Based on Gómez Jáuregui Module.
21Sep07 In Jan Marcus' Aspension Tower, note the date I assembled a model of a three-level version and my vision of it as a September 11, 2001, memorial. In Tensegrity Tetrahedron, note the date I completed assembly of a model of Snelson's tetrahedron.
11Sep07 In Jan Marcus' Aspension Tower, note that a three-level version of my design is available in the tensegrity viewers and add a datasheet for the three-level design. In Structure Based on Laminated Skew Prisms, note that a model of the "Skew Prism Arch" was completed on September 10. Add Datasheet for X-Module Tetrahedron.
28Aug07 Fix Datasheet for Skew Prism Arch, Datasheet for Structure Based on Laminated Skew Prisms, Datasheet for Perspective Prism and Datasheet for Skew Eight-Prism so "<Member>" gets displayed.
27Aug07 In Structure Based on Laminated Skew Prisms, note when assembly of a model was completed and add Datasheet for Skew Prism Arch. Minor correction to narrative of Datasheet for Structure Based on Laminated Skew Prisms. Add image dimensions to HTML for Skew Eight-Prism.
24Aug07 In Perspective Prism, note when assembly of a model was completed. In Datasheet for Perspective Prism and Datasheet for Skew Eight-Prism, note that 12-lb.-test fishing line was used. Add datasheet to Structure Based on Laminated Skew Prisms.
20Aug07 Add datasheet to Perspective Prism. Make minor wording corrections in two places in Datasheet for Skew Eight-Prism.
17Aug07 New graphic (using new data) for Perspective Prism (plumper -- ends more circular).
15Aug07 Add a rendering of the X-Column to Dodecahedron with X-Column Edges.
13Aug07 Add Dodecahedron with X-Column Edges.
23Jul07 In Tensegrity Tower, mention the quote from Bucky's "Tensegrity" article which appears in Val's book.
29Jun07 Change title of "Two Wheels Based on Val Gómez Module" to Two Wheels Based on Gómez Jáuregui Module and mention Val's book. In Tensegrity Tetrahedron, change "Gómez" to "Gómez Jáuregui".
27Jun07 In Tensegrity Arch by Maxim Schrogin, note the construction date and location of the arch.
07Jun07 In Laminar 2ν Tensegrity Octahedron and Laminar 2ν Tensegrity Octahedron (variation), elaborate the discussion and point out the parallels with the difference between my truss and Snelson's truss.
28May07 Convert last 12 in list to thumbnail links. In Snelson's Planar Pieces, note that his truss is different from the one that I use for my double-layer dome design.
27May07 Convert next four in list to thumbnail links. Change title of "Four-stage X-Module Tensegrity Bean Teepee" to Four-stage X-Module Bean Teepee.
26May07 Convert next four in list to thumbnail links.
25May07 Convert next four in list to thumbnail links, and modify one thumbnail (use ray trace instead of photo).
24May07 Start adding thumbnail JPEGs for each page. Converted first 40 of 64 items.
15May07 In Bridge with T-Prism Joints, change intergate.com links to hires bridge renderings to angelfire.com.
04Mar07 In Infinite-Stage X-Module Column, remove obsolete Matthijs Hogervorst link.
16Feb07 Add Perspective Prism.
12Nov06 In page on Snelson's walking pieces, mention Thomas Eakins' motion studies.
16Oct06 In Minimum of Eight Spokes, note my experience with the ten-constraint version, and mention the seven-strut arrangment by Tim Tyler.
04Sep06 In Structure Based on Laminated Skew Prisms, find a new link for Albrecht Dürer's drawing "Praying Hands". (The old one ceased functioning.)
31Aug06 In Jan Marcus' Aspension Tower, add a link to Joe Moore's reference on aspension.
30Aug06 Add Jan Marcus' Aspension Tower.
07Jul06 In Tensegrity Tower, link in actual correspondence with Kenneth Snelson regarding this page and tensegrity. Reorganize and amplify that essay a bit.
13Jun06 In Laminar 2v Tensegrity Octahedron (variation), note that Rupert bought the structure.
13Jun06 In Thirteen Great Circles, mention the uniform representation of symmetry transforms that Fuller's system allows, put Kenner's name as author of Geodesic Math, mention that it's back in print, and reorganize the words of my essay slightly.
08Jun06 In Tetrahelix and the Double Tetrahelix, add "except for i" exception in note on recursive formulation.
07Jun06 In Tetrahelix and the Double Tetrahelix, add notes on recursive formulation, synergy and Professor Dzugutov's research.
29Apr06 In Infinite-Stage X-Module Column, add Matthijs Hogervorst photo and link.
23Mar06 In Structure Based on Laminated Skew Prisms, note the resemblance to Albrecht Dürer's drawing "Praying Hands". Reword things a bit.
22Mar06 In Tensegrity Arch by Maxim Schrogin, center the second photo.
17Mar06 In Tensegrity Tetrahedron, link to image of della Sala tensegrity tetrahedron from book and mention Tom Flemons work. Note versions of all the models are now avaialble in all the tensegrity viewers.
13Mar06 Add the balance of the abandoned planar patent pages to Snelson's Planar Pieces (some page numbers changed). In Tensegrity Tetrahedron, mention Snelson's work in this area.
02Mar06 In Sisal-Twine Tensegrity Domes, correct a duplication typo and do some minor rephrasing/amplification in a few places.
27Feb06 In Tensegrity Tetrahedron, mention MoMA mast and link to R.W. Gray's copy of Bucky's "Tensegrity" article which has a photo. In Skew Four-Prism, Skew Eight-Prism and Structure Based on Laminated Skew Prisms, note Masic et al. paper.
22Feb06 In Tensegrity Prism as Joint, note the Shirley Historical Society exhibition the Cubic Lattice Segment appeared in. Add widths and heights on the images so that relative references work well. Before that, the Laminar 2v Tensegrity Octahedron appeared in an art exhibit at Hazen Library. I have a photo of a drawing (Citgo Gas Station) I exhibited there as well, but I forget the details of the exhibit. I'll dig them up.
15Feb06 In Skew Four-Prism, tweak raytrace of new version of the skew four-prism.
13Feb06 In Skew Four-Prism, add another version of the skew four-prism based on latest research.
09Feb06 In Structure Based on Laminated Skew Prisms, shrink file sizes for the graphics.
08Feb06 In Two-Stage X-Module Column, add some historical notes, links and guides to Snelson's tensegrity research. In Structure Based on Laminated Skew Prisms, add raytrace and text for "Skew Prism Arch".
07Feb06 In First Tensegrity Mast, mention availability of models in tensegrity viewers and that the model I built isn't completely "monogyre".
31Jan06 In Structure Based on Laminated Skew Prisms, note design completion date. In Tensegrity Vector Equilibrium, note model is available in Dynamic Tensegrity Views.
27Jan06 Add Structure Based on Laminated Skew Prisms.
26Jan06 In Tetrahelix Based on A Quanta Module and The Mite, note D-Stix now are available at Nasco.
23Jan06 In Minimum of Eight Spokes, note Tim Tyler's work.
16Jan06 In Analysis of Indexer II Data (second draft), fix link.
14Jan06 In Thirteen Great Circles, fix reversed links to Synergetics.
13Jan06 In Thirteen Great Circles, increase the width of the lines. In Tensegrity Tower, note the date Ken gave me for originally coming up with this design, and link to Octahelix.
03Jan06 In Tall Tale (San Diego, 1976), call it a maquette rather than a mock-up.
01Jan06 Add Dick's and Adrian's helices to Octahelix.
30Dec05 Add Octahelix and Six-Strutted Tensegrities. In First Tensegrity Mast, mention Emmerich's patent.
29Dec05 Add Geodesic Math Tensegrities. Rename "First Tensegrity Tower" as First Tensegrity Mast and change narrative accordingly. Add more exact references to Emmerich's work. In Thirteen Great Circles, note the two intersecting tetrahedrons. Inventory the circles. In Philip Stewart, link to the University of Michigan's copy of Indexer II. In Ten-stage Tensegrity Torus correct Emmerich's name and note that the prisms in his version don't alternate in sense.
27Dec05 Add Thirteen Great Circles.
26Dec05 Add Tensegrity Rhombic Dodecahedron. Add photo of another tensegrity cuboctahedron design to Tensegrity Vector Equilibrium. Add dates and additional narrative to Tensegrity Octahedron and Tensegrity Tetrahedron. Update narrative for Laminar 2v Tensegrity Octahedron (variation).
19Dec05 In Minimum of Eight Spokes and Skew Three-Prism, link to Dick Fischbeck's website. In Tensegrity Tetrahedron, link to Spencer Hunter's website. In Four-fold Reduced-Symmetry Prism and Skew Four-Prism, add a few more non-breaking spaces.
14Dec05 Clean up a few details in Philip Stewart. It turned out I do have a record of emailing the final analysis. True it's to his old email address, but it wasn't *that* old. Add Snelson's Planar Pieces.
13Dec05 Add Philip Stewart.
12Dec05 In Tall Tale (San Diego, 1976), expand Audrey II photo, add dimensions to img tags.
10Dec05 Add artist statement, a few more words of my own and some more photos to Tall Tale (San Diego, 1976). Shrink the file size of the photos posted yesterday.
09Dec05 Link Bead Arch (1959) into Eleven-Stage X-Module Arch and Four-stage X-Module Tensegrity Bean Teepee. Link Tall Tale (San Diego, 1976) into Tensegrity Tower.
06Dec05 In Toothpick Models, talk a little more about the tetrahelix and the vector equilibrium. Add some internal links, and remember that Sphere Models is now the next photo in the gallery. In Sphere Models, Double Tetrahelix and Tetrahelix and the Double Tetrahelix, use the term "double tetrahelix" instead of just "double helix" and add some data on the geometry of the figures. In Double Tetrahelix, mention the DNA connection. Thanks to Tim Tyler for pointing out the terminology deficiency and reminding me about the DNA stuff.
26Nov05 In Tensegrity Prism as Joint, fix the second table so it centers OK.
25Nov05 In Six-fold Equi-tendoned Prism, it should be David Georges rather than G. D. Emmerich.
22Nov05 Add photo of finished second structure to Tensegrity Tetrahedron and write some concluding thoughts.
21Nov05 Add Twelve-stage Tensegrity Torus and Tensegrity Tetrahedron (2nd version) to Datasheets. Reduce file size of photo installed on November 18.
18Nov05 Add First Tensegrity Tower. Redistribute text in a sensible way between this new page, Tensegrity Tower and Tensegrity Vector Equilibrium. Revise other text a bit for both the latter.
14Nov05 Add photo of assembled model and detail to Tensegrity Tetrahedron, revise text accordingly and revise Datasheet for Tensegrity Tetrahedron.
10Nov05 In Triangularly Girdled Six-fold Prism and Concentric Five-fold Prisms, update Goethe-Institut link.
03Nov05 Reduce file size of four photos installed on November 1. Gimp 2.0 seems to be able to save JPEG in less space than Adobe PhotoDeluxe 2.0.
01Nov05 Add Tetrahelix Based on A Quanta Module. Amplify, add a new photo and enlarge the old photo of Tetrahedral Geodesics. Rename it from "Tetrahedral Geodesic". Amplify The Mite with construction material information and a quotation from my lab book. Add a raytrace of the 6ν dome design to Sisal-Twine Tensegrity Domes, and link to the next design iterations.
27Oct05 Add Two-Frequency "Vector Equilibrium".
20Oct05 In Eight-stage Tensegrity Arch, note that it's now available for perusal in the tensegrity viewer. Add Tensegrity Tetrahedron and Datasheet for Tensegrity Tetrahedron. In Skew Eight-Prism, note new link to Skew Prism Article.
12Oct05 Add Sisal-Twine Tensegrity Domes.
09Sep05 In Index, note that I also post changes to bit.listserv.geodesic.
17Aug05 Rename "Wheel Based on Val Gómez Module" to Two Wheels Based on Val Gómez Module and add data for second wheel to it.
16Aug05 Add exhibition photo to Laminar 2v Tensegrity Octahedron (variation).
15Aug05 Add Wheel Based on Val Gómez Module.
02Aug05 In Bridge with T-Prism Joints, add link to VRML model of Siamese twins.
27Jul05 In Hub for X-Module Columns, add link to VRML model. In Tetrahelix and the Double Helix, link to the VRML model for the double (tetra)helix.
26Jul05 No longer revising the Guide, so I'll no longer say that in the opening monologue for the Index. I found a truncated octahedron made of spheres, so I'll put that in the Sphere Models picture and caption too.
25Jul05 Fix bad link in Two-fold Prism Girdled by Four-fold Prism and link to VRML model. In Triangularly Girdled Six-fold Prism Datasheet, Concentric Five-fold Prisms and Concentric Five-fold Prisms Revisited, add links to VRML models.
24Jul05 Add Sphere Models. In Modified Orthogonal Girdled Six-fold Prism Datasheet, add link to VRML Model.
23Jul05 In Four-fold Tensegrity Obelisk Datasheet, add link to VRML Model.
22Jul05 In Tensegrity Prism as Joint, add link to VRML model -- Orthogonal Three-Prism (simple hubs). Fix typo in Four-stage X-Module Tensegrity Bean Teepee.
21Jul05 In Six-fold Equi-tendoned Prism, Merger of Three Six-Fold Tensegrity Prisms, Tensegrity Vector Equilibrium and Emmerich's Prism, note the availability of VRML models below the appropriate graphic.
20Jul05 In Ten-stage Tensegrity Torus and Eight-Stage X-Module Torus, note these designs are available as VRML models.
19Jul05 Reword the text of Skew Eight-Prism a bit and note the availability of VRML models. In Tetrahelix and the Double Helix, note the availability of a VRML model for the tetrahelix. In Four-stage X-Module Tensegrity Bean Teepee, note the availability of a VRML model for the second version of the structure. In Datasheets, add links to datasheets mixed up with the press releases.
14Jul05 In Laminar 2v Tensegrity Octahedron (variation), note the availability of an OpenGL view. In the Index, change the link to the Java-Based Tensegrity Viewer to a link to Dynamic Tensegrity Views. In the Tensegrity Tulip, note that it is also available as a VRML model.
08Jul05 Add links to VRML models to Laminar 2v Tensegrity Octahedron (variation) and Eleven-Stage X-Module Arch.
01Jul05 Add Laminar 2v Tensegrity Octahedron (variation). Revise Laminar 2v Tensegrity Octahedron to include a few more details on its development, discuss the 4v version and link to relevant structures in the Tensegrity Technology prospectus. Revise Cubic 'Fly's Eye' Laminar Tensegrity to include a few more details on its development.
21Jun05 Put photo of second version in Four-stage X-Module Tensegrity Bean Teepee and update narrative.
15Jun05 Revise Four-stage X-Module Tensegrity Trellis/Plant Hanger Datasheet to take into account that the struts are actually 1-7/16" square, not 1.5" square. Four-stage X-Module Tensegrity Bean Teepee needed to be changed as well.
14Jun05 Complete and revise Four-stage X-Module Tensegrity Trellis/Plant Hanger Datasheet. The main revisions were to change the construction lengths for end1 and end2 and note how the force magnitude value should be interpreted since the software treats them as two superimposed tendons. Also the hanger branches are scaled back significantly. The end1/end2 changes also needed to be made to Four-stage X-Module Tensegrity Bean Teepee Datasheet.
10Jun05 Add Four-stage X-Module Tensegrity Trellis/Plant Hanger Datasheet (incomplete).
26May05 Note on Four-stage X-Module Tensegrity Bean Teepee Datasheet the specific brand of nylon twine it was designed for.
03May05 Add notes to Tensegrity Prism as Joint, Emmerich's Prism, Modified Orthogonal Girdled Six-fold Prism, Merger of Three Six-Fold Tensegrity Prisms, Skew Eight-Prism, Four-stage X-Module Tensegrity Bean Teepee, Eight-Stage X-Module Torus and Eleven-Stage X-Module Arch indicating one or more models on each of those pages can also be found in the Tensegrity Viewer.
26Apr05 Add photo of model to Skew Eight-Prism and augment and revise the text a bit.
11Apr05 Add half-cuboctahedron photo to Tensegrity Vector Equilibrium.
08Apr05 Add some more modeling details and background to Tensegrity Vector Equilibrium. Add construction lengths to Half Cuboctahedron Datasheet.
06Apr05 Rename Eight-fold Skew Prism to Skew Eight-Prism. Add construction lengths to datasheet. Rename Three-fold Skew Prism and Four-fold Skew Prism to Skew Three-Prism and Skew Four-Prism respectively.
28Mar05 Note in Datasheets that Eight-Stage X-Module Torus, X-Module Torus Revisited and Merger of Three Six-Fold Tensegrity Prisms contain data on member lengths and forces as part of their narratives. Invisibly note -- in HTML comment -- data sources for Eight-Stage X-Module Torus and Merger of Three Six-Fold Tensegrity Prisms. In Four-fold Tensegrity Obelisk, note some of the base tendons are looser than desirable and that it's available in the Tensegrity Viewer. Note other authors of seminal skew-prism article in Eight-fold Skew Prism.
25Mar05 Add Eight-fold Skew Prism.
13Mar05 In Four-stage X-Module Tensegrity Bean Teepee, that should be "whiskey", not "whikey" whatever that is.
08Nov04 Add data from exogenous load simulation to Tensegrity Tower Datasheet.
03Nov04 Simplify Orthogonal Tensegrity Cube Datasheet by using symmetry transformations. Add Merger of Three Six-Fold Tensegrity Prisms.
07Oct04 In Emmerich's Prism, note that further variations didn't turn out well.
06Oct04 Add two views of a model of the twins at the bottom of Bridge with T-Prism Joints.
05Oct04 Add a picture of the variation to the page on Emmerich's Prism.
30Sep04 Add Emmerich's Prism. Fix minor formatting problem in Second Datasheet for Three-fold Tensegrity Prism With Orthogonal Struts.
22Sep04 Add my theory of how the eight-spoker makes the grade to Minimum of Eight Spokes. Add a few more observations on this experiment and end the story with a moral. Add X-Module Torus Revisited.
21Sep04 Note how the six-spoke hypothesis work out at the bottom of Minimum of Eight Spokes and link to Amy Edmondson's words on the twelve-spoke wheel.
17Sep04 Replace top illustration of Skew Four-fold Prism with same picture using smaller font for labels. Note six-spoke hypothesis at the bottom of Minimum of Eight Spokes.
14Sep04 Add Emmerich's Prism and Variation on Emmerich's Prism. Correct directory name for data file reference in Datasheet for Three-fold Tensegrity Prism With Orthogonal Struts.
27Aug04 Add bridge images and some data references to complete Bridge with T-Prism Joints. Correct some wording in Second Datasheet for Three-fold Tensegrity Prism With Orthogonal Struts. In Four-stage X-Module Tensegrity Bean Teepee, note that photo of first bean teepee with beans has been posted.
26Aug04 Start Bridge with T-Prism Joints.
23Aug04 Change name of Bicycle-Spoke Tensegrity Octahedron to Bicycle-Spoke Tensegrity Icosahedron.
11Aug04 Put HTML comment referencing notes and files in Stress-Strain Chart. Swap "stress" and "strain" in chart header. In Datasheets, note the narrative files where member length and force data has been included. Add a picture of the bean teepee with beans growing on it to Rehabilitated Tensegrity Bean Teepee.
10Aug04 Add remaining items to Datasheets index.
09Aug04 Add Datasheets index and graphic presentation of stress-strain charts. Add data used in repairs to Eight-stage Tensegrity Arch Datasheet, and reformat existing data. As a datasheet is added to the list, update it to make its presentation consistent with the others and include information on the material used for the tendon in each case. The first three datasheets were processed for this first batch. In Four-fold Tensegrity Obelisk, don't call the datasheet cryptic even though it still may be.
15Jul04 Add Four-stage X-Module Tensegrity Bean Teepee.
13Jul04 Add a photo of a hub to Tensegrity Arch by Maxim Schrogin, and touch up the first photo of the arch to remove camera artifact. Augment text of Concentric Five-fold Prisms to mention Mark Morris's choreography of Bach's Third Cello Suite.
25Jun04 Add a few more characteristics and key words to X-Module Double Helix.
24Jun04 Add X-Module Double Helix.
14Jun04 Add Hub for X-Module Columns. Add value for unit strut clearances to Infinite-Stage X-Module Column and Two-Stage X-Module Column.
08Jun04 Note Emmerich's earlier work in Ten-stage Tensegrity Torus and Six-fold Equi-tendoned Prism.
03Jun04 Add Four-stage X-Module Tensegrity Bean Teepee Datasheet.
26May04 Add average tendon force magnitude value to Tensegrity Tower Datasheet.
25May04 Upgrade Eight-stage Tensegrity Arch Datasheet, Four-fold Tensegrity Obelisk Datasheet, Two-Stage X-Module Column Datasheet and Tensegrity Tower Datasheet. Don't apologize for the datasheet in Eight-stage Tensegrity Arch. Not to say I shouldn't, but I've worked enough on the associated datasheet for awhile.
21May04 Add backlinks to Eight-stage Tensegrity Arch Datasheet and Four-fold Tensegrity Obelisk Datasheet.
14May04 Add Prism Dome.
21Apr04 Add some more thoughts to Tensegrity Prism as Joint and revise the prose a bit.
19Apr04 Fix typo and slightly revise text recently added to Tensegrity Prism as Joint. Talk a bit about tieing the tendons.
16Apr04 More minor revisions to text of Second Datasheet for Three-fold Tensegrity Prism With Orthogonal Struts. Put photo of cubic lattice structure in Tensegrity Prism as Joint and adjust and augment the narrative accordingly.
14Apr04 Slightly revise narrative text and add another set of construction lengths to Second Datasheet for Three-fold Tensegrity Prism With Orthogonal Struts.
09Apr04 Use Snelson's "column" terminology rather than my ill-chosen "chain" terminology in Infinite-Stage X-Module Column, Two-Stage X-Module Column, Two-Stage X-Module Column Datasheet and where these are referenced. Add minor clarifications to text for Six-fold Equi-tendoned Prism.
29Mar04 Add Eleven-Stage X-Module Arch Datasheet. Mention Quincy3's real name (Brian Quincy Hutchins -- another alias?) in Modified Orthogonal Girdled Six-fold Prism.
02Apr04 Add Eleven-Stage X-Module Arch.
23Mar04 Add Two-Stage X-Module Chain. Add average tendon force value to data chart in Concentric Five-fold Prisms Revisited. Add average tendon force value to data chart in Eight-Stage X-Module Torus. Add diagram and data for an alternative version of this torus. Wreathe the Fredonian Park gazebo with a 12-stage version of the torus rather than surrounding it with an eight-stage version.
22Mar04 Use "p" and "q" rather than "x" and "y" to suffix the two topologically symmetrical member groups in Tensegrity X-Module Torus. This will avoid them being confused with any relationship to x and y axes. Change title to Eight-Stage X-Module Torus. Change title of Tensegrity X-Module Chain to Infinite-Stage X-Module Chain. Add Eric Phillips' photo and statement to Concentric Five-fold Prisms Revisited.
19Mar04 Add Tensegrity X-Module Chain and Tensegrity X-Module Torus. Take a little more care in discussing Kelvin's tetrakaidecahedron and enantiomorphism in Modified Orthogonal Girdled Six-fold Prism.
12Mar04 Factor Quincy3's remark into my narrative for Modified Orthogonal Girdled Six-fold Prism. That prism is enantiomorphic after all, or at least polarized. Note in Skew Four-fold Prism that the technique used for it and the Three-fold Prism don't seem to work for five- and six-fold prisms.
10Mar04 Add Modified Orthogonal Girdled Six-fold Prism.
05Mar04 Add Concentric Five-fold Prisms Revisited.
03Mar04 Add and/or reposition back links to revision history.
23Feb04 Add references to Allen Back's and Bob Connelly's Catalogue of Symmetric Tensegrities to Tensegrity Prism as Joint. Add reference to Snelson's X-Module to Three-fold Skew Prism.
18Feb04 Add Two-fold Prism Girdled by Four-fold Prism.
10Feb04 Revise data for Eight-stage Tensegrity Torus Datasheet and create Six-stage Tensegrity Torus Datasheet and Four-stage Tensegrity Torus Datasheet and link them into Ten-stage Tensegrity Torus. Revise and augment language in the latter to accommodate more recent research. Augment explanatory language in Ten-stage Tensegrity Torus Datasheet and add back link. Correct typo in explanatory language for Concentric Five-fold Prisms Datasheet and Triangularly Girdled Six-fold Prism Datasheet. In Tensegrity Arch by Maxim Schrogin, note that photo of Snelson's "Rainbow Arch" is available on Snelson's website.
04Feb04 Add Concentric Five-fold Prisms and link datasheet to it. Minor corrections to interpretive language in Triangularly Girdled Six-fold Prism Datasheet and Concentric Five-fold Prisms Datasheet.
03Feb04 Add Triangularly Girdled Six-fold Prism and link datasheet to it.
29Jan04 Add datasheets for Triangularly Girdled Six-fold Prism and Concentric Five-fold Prisms.
27Jan04 Add Tensegrity Tulip and link Tensegrity Tulip Datasheet to it. Correct back link labels for Orthogonal Tensegrity Cube Datasheet and Zig-zag Tensegrity Cube Datasheet. Add back links to Datasheet for Three-fold Tensegrity Prism With Orthogonal Struts and Second Datasheet for Three-fold Tensegrity Prism With Orthogonal Struts.
26Jan04 Add Tensegrity Tulip Datasheet. Try to make Second Datasheet for Three-fold Tensegrity Prism With Orthogonal Struts a little more intelligible and link to corresponding construction lengths in Datasheet for Three-fold Tensegrity Prism With Orthogonal Struts.
20Jan04 Correct diagram of cubic cell in Second Datasheet for Three-fold Tensegrity Prism With Orthogonal Struts and add picture of cube emerging from Dead Pond.
16Jan04 Add Second Datasheet for Three-fold Tensegrity Prism With Orthogonal Struts and link it to revised version of Tensegrity Prism as Joint.
06Jan04 Put reference to photo of Snelson's "Rainbow Arch" in Tensegrity Arch by Maxim Schrogin.
30Dec03 Link Tensegrity Tower Datasheet to Tensegrity Tower. Link Orthogonal Tensegrity Cube Datasheet and Zig-zag Tensegrity Cube Datasheet to Tensegrity Prism as Joint and add photo of the orthogonal cube. Link Half Cuboctahedron Datasheet to Tensegrity Vector Equilibrium.
26Dec03 Insert Tensegrity Vector Equilibrium. Note date of construction in Laminar 2v Tensegrity Octahedron. Make a note in the Synergetics Gallery Index that I post notifications of major additions and changes to the material here to the Geodesic listserv. Note the stimuli for my interest in Snelson's work in Tensegrity Tower. Add a link to a photo of Snelson's tower to Tensegrity Arch by Maxim Schrogin. Insert Cubic 'Fly's Eye' Laminar Tensegrity. Add link to Doug Milliken's email to Ten-stage Tensegrity Torus.
25Dec03 Add Ten-stage Tensegrity Torus. Add photo of my model of the three-fold prism with orthogonal struts to Tensegrity Prism as Joint.
17Dec03 Add Datasheet for Three-fold Tensegrity Prism With Orthogonal Struts and link to it in Tensegrity Prism as Joint.
08Dec03 Add some more interpretive text to the caption for the photo of the Tensegrity Arch by Maxim Schrogin. Revise text of Index.
03Dec03 Add Tensegrity Prism as Joint.
01Dec03 Add axial-view photo to Four-fold Tensegrity Obelisk.
26Nov03 Add links to Tom Longtin to Eight-stage Tensegrity Arch.
17Nov03 Added more text to Eight-stage Tensegrity Arch and linked in Tensegrity Arch by Maxim Schrogin.
14Nov03 Add Eight-stage Tensegrity Arch.
05Nov03 Mention tendon doubling in Four-fold Tensegrity Obelisk.
29Oct03 Add denouement to Four-fold Skew Prism.
28Oct03 Add Four-fold Skew Prism and have Four-fold Reduced-Symmetry Prism link to it.
22Oct03 Add Four-fold Tensegrity Obelisk.
22Sep03 Add Rehabilitated Tensegrity Bean Teepee and Seven-fold Equi-tendoned Prism.
25Jul03 Add another version to the Three-fold Skew Prism where the virtual tendons are now made real.
22Jul03 Add end points to Four-fold Reduced-Symmetry Prism. Correct typos and make virtual edge end points explicit in Three-fold Skew Prism.
21Jul03 Added another model to Three-fold Skew Prism along with model statistics and more text. Renamed Four-fold Asymmetric Prism to Four-fold Reduced-Symmetry Prism.
18Jul03 Added Four-fold Asymmetric Prism.
17Jul03 Added Three-fold Skew Prism.
14Jul03 Correct two typos in Minimum of Eight Spokes. Revised the text and HTML of the Index a bit. Revised the HTML of Bicycle-Spoke Tensegrity Octahedron, Minimum of Eight Spokes and Six-fold Equi-tendoned Prism to remove glitch that was appearing (on my Mozilla 1 browser anyway) after the first navigation button because of a CR before the terminating </a> for the link.
19May03 Added Six-fold Equi-tendoned Prism.
22Apr03 Revised Tensegrity Tetrahedron with Aligned Struts so the two types of struts are colored differently. Edited the text a bit. Applied Adobe PhotoDeluxe "instant fix" to photos for Tetrahelices, Double-Layer Tensegrity Dome and Bicycle-Spoke Tensegrity Octahedron.
18Apr03 Revised Minimum of Eight Spokes to reflect latest explorations.
16Apr03 Revised Tensegrity Tetrahedron with Aligned Struts to reflect latest explorations.
26Feb03 Redid text for Minimum of Eight Spokes using journal entries.
19Feb03 Corrected RW Gray/Synergetics link, enhanced photo contrast and clarified last sentence for Tensegrity Tower. Added Minimum of Eight Spokes. Added meta tag indicating encoding to all HTML files.
08Nov02 Add Bicycle-Spoke Tensegrity Octahedron photo essay.
30Oct02 Add Double-Layer Tensegrity Dome photo.
23Dec01 Correct Patent # from 3,169,311 to 3,169,611 on Patent #3,169,611 Montage (thanks to Daniel Webb).
23Nov00 Add Tensegrity Tetrahedron with Aligned Struts.
21Aug00 Polish HTML. Eliminate double entry in index. Add alternate text descriptions to images.
16Oct99 Correct aspect ratio for POV-Ray diagrams of helices per suggestions of Kirby Urner and Russell Towle.
13Oct99 Add POV-Ray diagrams of helices.
26Jul99 Add remark about ethereal to tower.html.
03May99 Added link to patent montage to tower.html.
26Apr99 Revised caption for tower.html to add caveat on ephemeral.
21Apr99 Started revision file. Revised caption for mast.html and changed its name to tower.html to fix inadvertent plagiarism of Ken Snelson's tower concept.

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