This website contains tutorials on several topics in mathematics and numerical analysis as well as a number of other papers on various subjects. The tutorials cover harmonic analysis, numerical linear algebra, digital signal encoding, symmetry reductions and the modeling of Sonar transducers and arrays. There are also a number of papers on acoustics, particularly the acoustic radiation and scattering from arbitrary shaped bodies and the acoustic interaction of Sonar transducers in an array. In a slightly different vein you will find biographies of the famous mathematician Leonhard Euler and the great physicist James Clerk Maxwell. These biographies describe their life, their major contributions to science, and also their strong Christian faith. Another area that I have been interested in is the Biblical story of creation described in the first chapter of Genesis. I have written a paper that discuses various interpretations of the creation days in Genesis 1. I have also written a paper on the many injustices and violations of Hebrew law in the arrest and trial of Jesus. Hopefully this will encourage those who are victims of injustice today. Nowdays I do most of my reading on a Kindle and I became interested in how they are formatted. As a result I have written a tutorial on how to format an ebook for the Kindle using HTML, CSS, and the Kindlegen program. I hope these papers will be of interest to you and will prove to be useful.