The goal of the presentation is to give an overview about how to build a commodity PC based GNU/Linux cluster for High Performance Computing (HPC) in a research environment. Due to the extreme flexibility of the GNU/Linux operating system and the large variety of hardware components, building a cluster for High Performance Computing (HPC) is still a challenge in many cases. At the Division of I...

Early embryonic cell cycles in Drosophila consist of rapidly alternating S and M phases. Three genes, pan gu (png), plutonium (plu), and giant nuclei (gnu) coordinate these early S-M cycles by ensuring adequate Cyclin B protein levels. Mutations in any of these genes result in unregulated DNA replication and a lack of mitosis ("giant nuclei" phenotype). png encodes a serine/threonine protein ki...

We describe a novel, “focusable”, scalable, distributed web crawler based on GNU/Linux and PostgreSQL that we designed to be easily extendible and which we have released under a GNU public licence. We also report a first use case related to an analysis of Twitter’s streams about the french 2012 presidential elections and the URL’s it contains.

This paper reports on the status of the GNU Modula-2 front end to GCC and the extensions made to Modula-2 and gdb to ease its potential integration into the main GCC source tree. GNU Modula-2 (gm2) is maturing into a reliable tool and it now builds and passes its regression tests on the following platforms: x86, Opteron, Athlon 64, Alpha, Itanium processors running GNU/Linux, Sparc based Solari...

Spectutils is a GNU Octave toolkit for analyzing and visualizing audio signals. Spectutils allows to display oscillograms, FFT spectrograms as well as pitch detection graphs. Spectutils can best be characterized as a user interface for GNU Octave, which integrates signal analysis and visualization functionality into dedicated function calls. Therefore, signal analysis with Spectutils requires l...

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