<HTML><BODY>
<div> <br>
<pre><tt><tt>>dear manuel,</tt></tt></pre><pre><tt><tt>>typical cooling towers hyperbolic structures. See:<br>
<a href="http://en.wikipedia.org/wiki/Hyperboloid_structure" target="_blank">>http://en.wikipedia.org/wiki/Hyperboloid_structure</a><br>
<a href="http://en.wikipedia.org/wiki/Cooling_tower" target="_blank">>http://en.wikipedia.org/wiki/Cooling_tower</a><br>
<br>
>Your example seems to me as a mixture of a hyperbolic structure and a tube.</tt></tt></pre><br>
<br>
The author of these two splendid examples is Christian Sgraja :<br>
<br>
http://www.tug.org/pipermail/pstricks/2006/003384.html<br>
<br>
<br>
However, I also a little studied the representation of a tower of cooling of a nuclear thermal power station with the subscribers of the Syracuse list and the photographs of Jean-Michel Sarlat. The photographs and the PSTricks examples are here:<br>
<br>
http://syracuse.eu.org/~jms/photos/2006/0813-civaux1/<br>
http://syracuse.eu.org/~jms/photos/2006/0813-civaux2/<br>
<br>
http://syracuse.eu.org/syracuse/mluque/<br>
<br>
http://syracuse.eu.org/syracuse/mluque/pst-v3d/pst-V3D0.42/tours-civaux/<br>
<br>
Manuel </div>
<br>
<br>
<div id="AOLMsgPart_0_d7637cf6-88fa-4bc6-a8ca-5cf24bfd4aa0" class="AOLPlainTextBody">
<pre><tt>
Hans-Juergen Salchow
_______________________________________________
pstricks mailing list
<a href="mailto:pstricks%40tug.org">pstricks@tug.org</a>
<a href="http://tug.org/mailman/listinfo/pstricks" target="_blank">http://tug.org/mailman/listinfo/pstricks</a>
</tt></pre>
</div>
<!-- end of AOLMsgPart_0_d7637cf6-88fa-4bc6-a8ca-5cf24bfd4aa0 -->
</BODY></HTML>