Category Archives: Newton

Building dances to an earthquake’s beat

Posted on May 28, 2020 by

Adam Pascale from the Seismology Research Centre recently shared this animation (click on controls bottom right for High Quality and Full Screen views): … it’s from a building in the Philippines about 130km (hypocentral distance) from a magnitude 6.1 earthquake … Continue reading →

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Lennox Bridge

Posted on May 8, 2020 by

Last December I joined Bill Harvey on a visit to Lennox Bridge west of Sydney.  Bill has now documented the visit in his Bridge of the Month site, including history, comments on the structural form, and a dynamic 3D model … Continue reading →

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The Concrete Institute of Australia – Golden Jubilee

Posted on April 25, 2020 by

The Concrete Institute of Australia will celebrate 50 years in 2020. The Institute was originally formed when members of the Australia Prestressed Concrete Group proposed a change in 1968 where it was resolved to adopt the name Concrete Institute of … Continue reading →

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Dancing Pendulums Revisited

Posted on April 12, 2020 by

I have previously posted on Dynamically Defined Dancing Pendulums, using the Strand7 FEA program to generate the motion of a series of pendulums of varying length.  I have now updated that video using the latest Beta version of the program (Rel … Continue reading →

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More Python Traps

Posted on March 30, 2020 by

I recently posted on some Python Traps, focussing on code where changes in the values of sub-routine arguments were not reflected in the calling routines.  The reverse can also be a problem: if an array, a, is passed to a … Continue reading →

Posted in Arrays, Excel, Link to Python, Newton, NumPy and SciPy, PyXLL, UDFs | Tagged , , , , , | Leave a comment

LinEstGap with non-linear functions

Posted on March 14, 2020 by

The LinEstGap user defined function (UDF) allows the built-in Linest function to be used on data with empty cells or hidden rows, returning results that agree with the chart trend-line function, which automatically ignores blank cells and hidden data.  It … Continue reading →

Posted in Arrays, Curve fitting, Excel, Maths, Newton, UDFs, VBA | Tagged , , , , , , , , , | 1 Comment

Katherine Johnson, NASA Legend

Posted on February 26, 2020 by

Cartoon by Steve Breen from The San-Diego Union Tribune. More on Katherine Johnson.

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