steffen-mueller.net

[...] Before I built a wall I'd ask to know
What I was walling in or walling out,
And to whom I was like to give offence. [...]
- Robert Frost, 1914. Excerpt from „Mending Walls”

As you can probably tell by the URL, you found the homepage of Yet Another Steffen Müller.

There is a number of mostly unrelated things being hosted here. Chances are you are looking for one of them and stumbled across the domain. Please excuse the mixed use of English and German.

Work

I'm a physicist turned software developer working for booking.com in beautiful Amsterdam.

The following section primarily contains information about programming I have done and projects I am currently pursuing. This includes contract work as well as code that has been extracted from material used in my studies of physics.

Perl talks

XS++ - bonding Perl and C++ with minimal pain was presented at YAPC::EU 2010 in Pisa.
I presented a talk on Application Deployment and Dependency Management with PAR at YAPC::EU 2008 in Copenhagen and at the German Perl Workshop 2009 in Frankfurt (Main).

Perl applications

pp - The PAR Packager
As part of the PAR-Packer distribution which I maintain, this is a tool for producing stand-alone executables from Perl applications.
dumbbench - More reliable benchmarking with the least amount of thinking
fqstat - An interactive console based front-end for Sun's Grid Engine
cpan2par - Create PAR distributions from CPAN
ppd2par - Create PAR distributions from PPD XML files
parinstallppd - Install PPD/PPM packages using PAR
parinstallppdgui - GUI front-end for parinstallppd
errorcalculator - Calculations on Spreadsheets (i.e. matrices) with Gaussian Error Propagation
symevol - Evolutionary algorithms applied to symbolic formulas
tk-motion - Create particle simulations from differential equations
mp3shell - Manage a database of your MP3 collection
func - plot 2d functions into PNGs
threedp - project s(t,u) = (x(t,u), y(t,u), z(t,u)) onto an arbitrary plane in R^3
markov - run Markov Algorithms
huffman - generate Huffman encodings
chomsky - determine Chomsky type of a grammar (old and broken)
sizetree - create HTML trees of file/directory tree sizes
modver - search for Perl module version information
A hacked version of the AS perldoc to allow full text searching of the FAQ (Taken from 5.6.1 build 631.)
chef - an interpreter/compiler for the Chef programming language (See modules)

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Perl modules/distributions

I maintain over a hundred distributions of Perl modules and scripts which are all available from the Comprehensive Perl Archive Network short CPAN. According to Simon Wistow's CPAN Leaderboard, that makes me the author with the sixth most distributions over all.

The distributions used to be listed here, but I moved the lengthy list of distributions to its own page.

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random old stuff

This section contains material related to my studies of physics at the University of Karlsruhe. (This section is German at the moment.)

Protokolle des Physikalischen Anfängerpraktikums, Teil 1
Protokolle des Physikalischen Anfängerpraktikums, Teil 2
Protokolle des Physikalischen Fortgeschrittenenpraktikums
Eingescannte Notizen von Prof. Vojta zur Theorie D: Quantenmechanik I Vorlesung SS 2004
Hauptseminarvortrag und Handout zum Thema Ausgedehnte Luftschauer

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Computer generated graphics

Solar system simulations
These simulations were created with the Simulation::Particle Perl module mentioned above.

Evolutionary algorithm visualization
The following animations show the evolution of a matrix of formulas of numbers and operators approaching pi. The formulas are "mutated" according to certain rules. A close approximation of pi is honoured by spreading the corresponding formula to neighbouring cells. The lighter the cell, the better the fitness.
For more information, see symevol.

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person

If you read the information scattered in the previous sections, you will have gathered quite a bit about me. If I find the need or inclination to present myself any more detailed in the future, I will do so at this location.

I occasionally muse on various things Perl at my use.perl.org or blogs.perl.org journals.

The one thing I'll mention here is my GPG Public Key. In case you feel the urge to send me encrypted mail or verify the validity of my CPAN distributions.
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