Talk:Hyperboloid structure

message: Architecture would be better not as a history class. Anyone who knows decent amounts of architecture and advantages and disadvantages, construction difficulties and eases, structural integrity, etc., would help. I will start it, continue as needed. Inthend9 (talk) 03:01, 10 August 2009 (UTC)
thread_title: Properties of Hyperbolic Towers

message: Apparently the text of the article is a copy of http://www.arches.uga.edu/~anikov/intel/abstracts.doc . But since you, User:Elizabeth English appear to be the author of the original text, I believe you might also make an explicit statement about its copyright status and that you agree for it to be used under wikipedia license. I know it seems self-evident if you are the same person who authored the orignal article, but this is better be said. --Lysytalk 08:38, 24 February 2006 (UTC)
thread_title: Copyvio, but maybe ...

message: I have nominated the article on WP:DYK. Please check the question at Template talk:Did you know#February 23 abakharev 00:48, 25 February 2006 (UTC)
thread_title: WP:DYK

message: But it seems to not discuss why the two modern Australian buildings use these roofs or what the advantages/disadvantages/engineering challenges are... ++Lar: t/c 01:49, 25 February 2006 (UTC)
thread_title:  Great start! 

message: In this picture, the curved surfaces look to me as if they have positive Gaussian curvature.  Hyperboloid structures of course have negative Gaussian curvature.  Am I missing something? Michael Hardy 03:08, 27 February 2006 (UTC)
replies: text: Oh, and why are most of the links to this page user pages? Michael Hardy 03:10, 27 February 2006 (UTC)
replies: text: To the talk page? Or the article? If the latter, it's because the article is currently in the  template, which many users include on their pages... Once it rolls off, most of the links will go away too, I expect. Hope that helps. PS, good sleuthing on the Opera House! ++Lar: t/c 03:45, 27 February 2006 (UTC)
replies: text: Oh, OK, we're not talking only about ruled surfaces, but also allowing hyperboloids of revolution.  In that case, the Sydney Opera House could be a correct example. Michael Hardy 22:29, 27 February 2006 (UTC)
thread_title: The Sydney Opera House does not look hyperboloid at all in this picture

message: I've edited the phrase "non-Euclidean" out of the following sentence:
:By applying his analytical skills to the doubly-curved, non-Euclidean surfaces Nikolai Lobachevsky named "hyperbolic," Shukhov derived a family of equations that led to new structural and constructional systems, known as hyperboloids of revolution and hyperbolic paraboloid.
I don't think whoever put that in understood the meaning of the term. The term "non-Euclidean" applies to an entire mathematical theory, not to a specific shape. It's true that there are models of non-Euclidean geometry that are constructed using two-dimensional surfaces embedded in a three-dimensional Euclidean space, but, e.g., we don't describe a sphere as non-Euclidean just because it can be used in this way.--Bcrowell 04:33, 27 February 2006 (UTC)
replies: text: I agree -- if they were non-Euclidean, they couldn't exist in the Euclidean (for all practical purposes) space they're built in!  I've also corrected further comments: Lobachevskii didn't "disprove" the parallel postulate, and the pseudosphere is the surface of revolution of a tractrix, not a hyperbola, and is not a ruled surface, hence cannot be the shape referred to. Richard Pinch 06:34, 9 October 2006 (UTC)
thread_title: non-Euclidean

message: Sidney Opera House is Hyperboloid of two sheets, see Fig 2:
http://www.nexusjournal.com/Didactics_v5n1-Consiglieri.html
This is wrong. Many People here are wrong about this. The Sydney Opera house IS NOT a Hyperboloid. It was DESIGNED ORIGINALLY as a hyperboloid, but this proved difficult/impossible to build. The final building is pure spherical shells, which proved far easier both for the structural engineers att the time (Arups), and for the construction process (using a sphere meant that the whole could be made as a series of repetitive elements rather than building each being individual. 
If you want more proof of this, I will find it for you, but please dont guess. Miscreant 22:23, 31 July 2006 (UTC)
thread_title: The Sydney Opera House is Hyperboloid of two sheets

message: I thought calling someone 'great' in the opening sentance ("first applied by great Russian engineer Vladimir Grigorevich Shukhov (1853-1939)")was a little against the Wikipedia:Neutral point of view policy. But when changed it was soon reverted back. I don't want to start a minor edit war so i'll put my thought here instead. I'm not too concerned if other people think its okay, but it seems quite blatant to me. Miscreant 11:39, 10 August 2006 (UTC)
thread_title:  'Great' engineer Vladimir Shukov 

message: The intro should state what a Hyperboloid structure is to begin with, before going into the history of it. Malamockq 18:44, 16 May 2007 (UTC)
thread_title:  Bad intro 

message: See Greek battleship Limnos for instance  —Preceding unsigned comment added by 213.137.118.204 (talk) 21:04, 4 July 2008 (UTC)
replies: text: Which was the USS Idaho (BB-24) with the aft mast before being sold to Greece. 66.232.94.33 (talk) 05:16, 23 October 2010 (UTC)
thread_title:  Use as a mast design on warships 

message: Is it always possible to see, if a structure is hyperbolic? For example Pylons of Cadiz are not, although they look very similiar.  —Preceding unsigned comment added by 91.46.215.93 (talk) 22:50, 20 June 2010 (UTC)
thread_title:  Identifying hyperbolic structures 

message: The Feb. 1980 issue of Popular Science had a cover article on hypar structures built using a light frame of steel rebar and strips of fiberglass screen. The screen was then covered with plastic resin ans for some applications a layer of concrete. http://books.google.com/books?id=96m36VQHlE8C&pg=PA74&lpg=PA74&dq=popular+science+hypar&source=bl&ots=nIG2oPiNr0&sig=lIohdEQV_Catn_2JdEvqp4gfN8E&hl=en&ei=gm7CTPztBYugsQOSpO3GDg&sa=X&oi=book_result&ct=result&resnum=1&ved=0CBMQ6AEwAA#v=onepage&q=popular%20science%20hypar&f=false 66.232.94.33 (talk) 05:13, 23 October 2010 (UTC)
thread_title:  Popular Science 

message: I question the value of this new link:
* The research of the Shukhov's World's First Hyperboloid structure, Prof. Dr. Armin Grün 
Up to where it stops playing for me, all I see is some people admiring the tower.  Is the narration informative? —Tamfang (talk) 23:14, 9 June 2012 (UTC)
thread_title:  Shukhov tower video 

message: The article seems to indicate that there are thermodynamic reasons to using the hyperboloid shape.  As far as I have been able to determine, the shape is ONLY structural. Perhaps this paragraph could do with some rewording?--Graham Proud (talk) 05:12, 18 March 2014 (UTC)
replies: text: Cooling Tower pack (also called "fill") is the material over which the water falls and is evaporated.  Essentially it slows the water down, and provides greater surface area for contact between air and water.  See the Terminology section in the Cooling Tower article for more information.--Graham Proud (talk) 04:47, 19 March 2014 (UTC)
thread_title:  Application in Cooling Towers 

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