Category Archives: Newton

The Inverse Quadratic Method – 2

Posted on 04/04/2010 by dougaj4

Firstly a clarification from the previous post in this series.  The method presented in that post was a direct application of quadratic interpolation, rather than the inverse quadratic method, as implied by the post title.  The inverse quadratic method will be … Continue reading →

Posted in Excel, Maths, UDFs, VBA | Tagged , , , , | 3 Comments

Some VBA maths resources

Posted on 01/04/2010 by dougaj4

In the past week I have discovered a couple of  sites with open source maths related VBA code that I was previously unaware of, and which deserve to be better known: AlgLib: “ALGLIB is a cross-platform numerical analysis and data processing library. … Continue reading →

Posted in Arrays, Excel, Maths, VBA | Tagged , , | 4 Comments

Function roots with the Inverse Quadratic Method

Posted on 31/03/2010 by dougaj4

An earlier post presented various methods for finding the roots of polynomial functions based on the use of linear interpolation.  It is sometimes advantageous to use a quadratic interpolation function, and methods using this approach will be presented in this and following … Continue reading →

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

Tension Stiffening

Posted on 12/03/2010 by dougaj4

Tension Stiffening in reinforced concrete is the increase in stiffness of a cracked member due to the development of tensile stresses in the concrete between the cracks.  The main application of tension stiffening theory in design applications is in the … Continue reading →

Posted in Beam Bending, Concrete, Excel, Newton, UDFs, VBA | Tagged , , , , , | 3 Comments

A post about everything …

Posted on 03/03/2010 by dougaj4

… according to xkcd From the top down: … and deeper down:  

Posted in Newton | Tagged , , , | 3 Comments