Author Archives: dougaj4

Perfect Anniversaries

Posted on 13/01/2010 by dougaj4

The young author of  The Math Less Travelled has just celebrated his 28 birthday, noting that 28 is a perfect number.  He laments that since the next perfect number is 496, it is most unlikely that he will see another perfect … Continue reading →

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Anathem (review of a book I haven’t read)

Posted on 10/01/2010 by dougaj4

This thread at the Self Service Science Forum http://www2b.abc.net.au/science/k2/stn/newposts/4494/topic4494948.shtm said: “I’ve been reading a bit of Neal Stephenson Sci/Fantasy recently. His bag is to combine philosophy of science concepts with historical/sci fi themes to produce interesing fiction. Think Iain M … Continue reading →

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Frame4.xls – Update2

Posted on 31/12/2009 by dougaj4

It was recently pointed out to me that the Frame4 spreadsheet was giving an overflow error with a fairly small analysis.  The problem turned out to be that the analysis did not have any restraint specified in the X direction, … Continue reading →

Posted in Excel, Finite Element Analysis, Frame Analysis, Newton, VBA | Tagged , , , | 12 Comments

Distributing Silverfrost Fortran Applications

Posted on 28/12/2009 by dougaj4

Earlier posts have included User Defined Functions (UDFs) linked to Fortran dll files compiled with Silverfrost Personal Fortran: Solving simultaneous equations – Fortran dll Trigonometric Functions – dll Linking Excel to Fortran – 2 Transferring these files to a new computer it came to my … Continue reading →

Posted in Excel, Link to dll, UDFs, VBA | Tagged , , , , , | 2 Comments

Just in Time for Christmas!

Posted on 21/12/2009 by dougaj4

The new version of the Australian Standard Concrete Structures Code (AS 3600) has just made it for 2009: Download from SAI Global

Posted in Concrete, Newton | Tagged , , | Leave a comment