With the photos they have released, it is easy to see it is an
impressive assemblage of artifacts at the Whitney. Which should trigger
some new ideas, like how about a meld between the Minni Earth Location
and Cloud Nines. Then you could tether it which would be simpler than
supporting it on a structure.

Bob

Dick Fischbeck wrote:

Ref: http://bobwb.tripod.com/synergetics/hugh/index.html (Item #2 in
the section "Errata")

Val brought another Geodesic Math erratum to my attention. Kenner
states Pugh was ignorant of Snelson's work, but this statement
undoubtedly needs to be qualified since there are several references to
Snelson's work in Pugh's Introduction to Tensegrity. Pugh's book was
originally a companion book to Geodesic Math. They were both issued at
the same time by the University of California Press, but unfortunately
Pugh's book was not reprinted when Kenner's book was reprinted shortly
after Kenner died. They are both very worthwhile for people interested
in tensegrity.

Bob

Ref: http://bobwb.tripod.com/synergetics/photos/marcus.html

At the bottom of the above-referenced page, I have put my design for an
aspension arch. I have had this in the back of my mind for awhile, and
the occasion of Jan's presentation on using the ANSYS civil engineering
software to design tensegrity structures at the Bridges conference in
Leeuwarden this July (see bridgesmathart.org) seemed a good one.

It seems a reasonable design. I have not honed the base coordinates so
it sits /exactly/ flat and, as seems to be the case with Jan's aspension
tower too, the prestresses are heavily concentrated in the bases.

Bob

I've been searching for information on these for the past year or so, but
haven't found much more than what I pasted below.

Can we build it with today's technology? If so, why hasn't one been built
yet?

The article says it could be used to build mini-cities housing thousands of
people. Assuming a diameter of one mile (that's the limit, right?), how big
of a city could a structure like this support?

Would the price per square foot be higher than say land in Manhattan or
Orange County, California?

Would people actually want to live in one?

http://en.wikipedia.org/wiki/Cloud_nine_(Tensegrity_sphere)

Cloud nines are airborne habitats first proposed by Buckminster Fuller.
Fuller proposed that giant geodesic spheres might be made to levitate by
heating the air inside.

Geodesic spheres (structures of triangular components arranged to make a
sphere) become stronger as they become bigger, due to how they distribute
stress over their surfaces. Because of this, they may be imagined on
colossal scales.

Law enforcement is now intercepting text messages,
as proven by Operation Sudden Fall in San Diego.

http://www.usdoj.gov/dea/pubs/states/newsrel/sd050608.html
http://www.signonsandiego.com/news/education/20080506-1338-bn06sdsu2.html

Don't let your personal SMS/text messages fall into
the wrong hands. Encrypt your messages with one
of these:

http://www.Xecure.net
http://www.CryptoSMS.org
http://www.CryptoSMS.com
http://www.CryptoGraf.com
http://www.Cop2p.com/encrypted_sms.html
http://www.FortressMail.net/fortress_sms.htm
http://groups.google.com/group/sms-salama/web/introduction
http://home.xtra.co.nz/hosts/sveltdesign/mindwarrior/pages.html?MobeCode

Be Safe, Be Encrypted, Fuck the Police!!

Law enforcement is now intercepting text messages,
as proven by Operation Sudden Fall in San Diego.

http://www.usdoj.gov/dea/pubs/states/newsrel/sd050608.html
http://www.signonsandiego.com/news/education/20080506-1338-bn06sdsu2.html

Don't let your personal SMS/text messages fall into
the wrong hands. Encrypt your messages with one
of these:

http://www.Xecure.net
http://www.CryptoSMS.org
http://www.CryptoSMS.com
http://www.CryptoGraf.com
http://www.Cop2p.com/encrypted_sms.html
http://www.FortressMail.net/fortress_sms.htm
http://groups.google.com/group/sms-salama/web/introduction
http://home.xtra.co.nz/hosts/sveltdesign/mindwarrior/pages.html?MobeCode

Be Safe, Be Encrypted, Fuck the Police!!

Law enforcement is now intercepting text messages,
as proven by Operation Sudden Fall in San Diego.

http://www.usdoj.gov/dea/pubs/states/newsrel/sd050608.html
http://www.signonsandiego.com/news/education/20080506-1338-bn06sdsu2.html

Don't let your personal SMS/text messages fall into
the wrong hands. Encrypt your messages with one
of these:

http://www.Xecure.net
http://www.CryptoSMS.org
http://www.CryptoSMS.com
http://www.CryptoGraf.com
http://www.Cop2p.com/encrypted_sms.html
http://www.FortressMail.net/fortress_sms.htm
http://groups.google.com/group/sms-salama/web/introduction
http://home.xtra.co.nz/hosts/sveltdesign/mindwarrior/pages.html?MobeCode

Be Safe, Be Encrypted, Fuck the Police!!

Law enforcement is now intercepting text messages,
as proven by Operation Sudden Fall in San Diego.

http://www.usdoj.gov/dea/pubs/states/newsrel/sd050608.html
http://www.signonsandiego.com/news/education/20080506-1338-bn06sdsu2.html

Don't let your personal SMS/text messages fall into
the wrong hands. Encrypt your messages with one
of these:

http://www.CryptoSMS.org
http://www.CryptoSMS.com
http://www.FortressMail.net/fortress_sms.htm
http://www.Cop2p.com/encrypted_sms.html

Be Safe, Be Encrypted, Fuck the Police!!

Ref:
http://www.freewebtown.com/bobwb/ts/synergetics/photos/marcus.html#x4l3marcusx1spec

In looking at making an arch based on Jan Marcus's tower technology, I
realized that Jan's aspension tensegrity technology does not yield
structures with the end-to-end symmetry I am used to in other arches I
have developed from towers. This is certainly not an obstacle to
developing an arch based on an aspension tower, but certainly it seems
worth exploring how the aspension technology can be extended to yield
structures with end-to-end symmetry. My first experiment in this regard
is the aspension canary.

I'm looking for symbolic geometry software that can find and show things
with a strict construction without necessarily using the Pythagorean
theorem or the infinite plane because of the following quote.

Synergetics:
http://www.rwgrayprojects.com/synergetics/synergetics.html

825.26 Pythagorean Proof
825.261 All of these steps were eventually taken and proven in a complex
of other proofs. In the meantime, they were diverted by the
Pythagoreans' construction proof of "the...