Talking of 1960’s UK folkies, I think this is hilarious. Wizz Jones stars in the battle of the long-haired beatnicks v Newquay Town Council:
Filed under: Bach | Leave a Comment »
More Acoustic Routes
Posted on June 27, 2009 by dougaj4
Parts 2-8 of Acoustic Routes have now been uploaded to Youtube.
Part 2:
Double click on the link above to go to Youtube and find the remaining 6 parts.
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A catenary function
Posted on June 25, 2009 by dougaj4
Following on from the previous post, here is an Excel User Defined Function (UDF) to calculate the coordinates of any specified catenary, with the option of also finding the tension force at any point.
Download from: Catenary.zip
The download file includes full open source code. To view the results of the function it must be entered as [...]
Filed under: Arch structures, Excel, Maths, Newton, UDFs, VBA | Leave a Comment »
Elegant proofs 4 – The optimum shape of an arch
Posted on June 16, 2009 by dougaj4
Large span arch structures have been constructed for well over two thousand years, but the first recorded analytical treatment was given by Robert Hooke in 1675 who at the end of his treatise on helioscopes added the following statement “to fill up the vacancy”:
“The true mathematical and mechanical form of all manner of arches for [...]
Filed under: Arch structures, Newton | 1 Comment »
