Category Archives: Newton

The Old Bridge at Heidelberg

Posted on 23/09/2008 by dougaj4

The “Old Bridge” at the German university city of Heidelberg was constructed in 1788,replacing a wooden bridge that had occupied the same site since 1284, and which was regularly destroyed by ice and floods. On the south bank can be … Continue reading →

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LHC Rap

Posted on 05/09/2008 by dougaj4

The Large Hadron Collider explained:

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Dog Tessellations

Posted on 31/08/2008 by dougaj4

An intruiging tessellation from a dog with a way with words Also a variety of tessellations from MC Escher. And while we are on tessellations, here is an animated tadpole tessellation posted by the dog’s father (who, strangely, does not seem … Continue reading →

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Solving simultaneous equations

Posted on 27/08/2008 by dougaj4

Solving a series of simultaneous equations is a task frequently required in engineering and scientific analysis.  Excel provides the tools to perform this task quickly and easily, but the procedure is not documented in the on-line help (so far as … Continue reading →

Posted in Arrays, Excel, Maths, UDFs, VBA | Tagged , , , , | 5 Comments

Reinforced Concrete Section Analysis – 5; Ultimate Limit State

Posted on 19/08/2008 by dougaj4

Previous posts in this series have looked at the analysis of beams where the steel stress is within the elastic range, and the concrete stress is sufficiently low that the assumption of linear elastic behaviour in compression is a reasonable approximation.  … Continue reading →

Posted in Beam Bending, Excel, UDFs | Tagged , , , , , , , | 5 Comments