Random Thoughts by Bob Jenkins
2017/10/08: My C++ ring simulator, which simulates multiple rings of moons around
the x=0 z=0 axis, appears to be working. Although two rings do not fall into clean elliptical orbits of one
another, it does appear that each moon conserves angular moment (pxvz -
pzvx), no matter how many rings or what their masses or arrangements.
(June 2017) I have a collection of political proposals. Not always
good ideas, but my contributions to the discussion.
Table of Contents (internal links):
- Here's a hash table, code for perfect hashing, a good hash function for hash table lookup,
a FAQ, some theory, and code to search for new hash functions. I tried designing block ciphers and finding characteristics. I had an article published in Dr. Dobb's in September 1997.
Have the cryptographic pseudorandom number
generator ISAAC, a small noncryptographic pseudorandom number generator, a prize for breaking ISAAC, and ISAAC's background and theory. Also take some tests for randomness, and a table of orders of magnitude. Here are also some protocols and a unit vector generator.
- See some skits from Boy Scouts,
SQL tricks from Oracle,
some paper airplanes,
and some cartoons that I wrote in college.
- Look into
formulae for n-body orbit simulations,
code for the HOMFLY knot
polynomial, voting methods, choosing random passwords,
jenny for pairwise testing,
some error correction codes,
a an april fool's design spec,
and a web page for choosing colors.
- Consider perpetual motion machines,
a dirigiped design,
a scale model of the solar system,
a page on exploring orbits with Java,
a simulation of Cruithne
(a near-earth object),
of figure-eight orbits,
of binary star planetary orbits,
a set of noncolliding orbits,
some Dyson Swarms (pretty pictures!),
some methods for the n-body problem,
a description of the orbit applet used,
and a tentative itzu world.
- Home projects
- See my half bath,
a house design that will never be built,
a dollhouse that did get built,
some genealogical notes,
and a roof rack for
- Here is my autobiography,
a cong from the British Museum,
a comparison of JPEG and JPEG 2000,
a bit on software patents,
my mom's art,
and some early Bob photos.
Here are people I've encountered more
Here are some other sites:
Send mail to Bob at firstname.lastname@example.org.