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My hobbies are aquaristics, cycling and free software.
 
My hobbies are aquaristics, cycling and free software.
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== My contribution to GNU Octave ==
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I have been a user of free software and linux since approximately 1999, but GNU Octave is the first project which I contribute to.
After my exit from academia, I could no longer legally use my educational license of MATLAB and its toolboxes, which had I used for research [http://dx.doi.org/10.1109/SIMUL.2010.24]  [http://exp.ln0.de/heimlich-power-2011.htm]. I continued working on my thesis' topic [http://dx.doi.org/10.1007/s00500-013-1008-8] and—as a hobby—put up a website showing off some functions from my thesis [http://exp.ln0.de/]. At first I experimented with integrating my MATLAB based functions via a webservice for the computational work, but since this was illegal, I had to reimplement my functions and some required interval arithmetic routines in PHP from scratch (yes, I really did this).
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In 2014, since I was still subscribed to the IEEE interval standard working group [http://grouper.ieee.org/groups/1788/], I noticed that the standard document was nearly finished and conforming implementations were still to be done. Also I noticed a request by the FSF for supporting GNU Octave as a high priority project with free replacements of MATLAB toolboxes [http://www.fsf.org/campaigns/priority-projects/priority-projects/highpriorityprojects#Octave]. I followed their call and created the [[Interval_package|interval package]], which soon became the first complete implementation of the preliminary standard IEEE 1788 (finally, my previous PHP exercise  payed out).
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== Contribution to Octave ==
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=== [[Interval package]] ===
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After my exit from academia, I could no longer legally use my educational license of MATLAB and its toolboxes, which I had  used for research [http://dx.doi.org/10.1109/SIMUL.2010.24]  [http://exp.ln0.de/heimlich-power-2011.htm]. I continued working on my thesis' topic [http://www.bibsonomy.org/bibtex/21691391037ae43d79ff2a05ec2da8ae3/nehmeier][http://dx.doi.org/10.1007/s00500-013-1008-8] and—as a hobby—put up a website showing off some functions from my thesis [http://exp.ln0.de/]. At first I experimented with integrating my MATLAB based functions via a webservice for the computational work, but since this was illegal, I had to reimplement my functions as well as some required interval arithmetic routines in PHP from scratch. Yes, I really did this, but it was no fun because the language isn't made for it and I had to compromise a lot.
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In 2014, since I was still subscribed to the IEEE interval standard working group [http://grouper.ieee.org/groups/1788/], I have noticed that the standard document was nearly finished and conforming implementations were still to be done. Also I noticed a request by the FSF for supporting GNU Octave as a high priority project with free replacements of MATLAB toolboxes [http://www.fsf.org/campaigns/priority-projects/priority-projects/highpriorityprojects#Octave]. I followed their call and created the [[Interval_package|interval package]], which soon became the first complete implementation of the standard [https://standards.ieee.org/findstds/standard/1788-2015.html IEEE Std 1788-2015] (finally, my silly PHP exercise  payed out).
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== External links ==
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* [https://github.com/oheim oheim] on Github
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