I have rewritten some parts of the ray-tracing code and changed, wherever possible, void to inline void. The speed-up of this small correction with ICC and optimization level 3 is about 7%.
Monthly Archives: March 2008
First steps with a GPU
I noticed that my Sony Vaio notebook is equipped with a NVIDEA GeForce 7400 card. As this type belongs to the 7 series ( see the specs) I have downloaded to corresponding SDK and made some checks. It seems that…
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Posted in computer, programming
GPU programming
Here’s a pretty comprehensive page which describes programming on a GPU. We’ll see if this brings me a step further….
Posted in computer
How to overlay a contour plot on a map within GNUPLOT
On my Fedora PC GNUPLOT 4.0 is installed which does not permit (or at least I did not manage) to overlay contour lines on top of a color map. The newer release (i.e. 4.2 )of GNUPLOT allows to do this,…
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Posted in computer
Managing publication lists by JabRef
I am trying to keep my list of papers up-to-date by storing all the information in a simple Bibtex file from which I can easily create formated output like HTML or PDFs. Today I downloaded a small but smart tool…
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GNUPLOT and logarithmic abscissa
Usually I am quite satisfied with the output which is provided by GNUPLOT. Only today I had to make a log-log plot and needed some dashed lines to produce a good-looking figure in BW. But GNUPLOT/postscript does not like dashed…
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Posted in computer
Ionosphere algorithm paper has been accepted
Our paper entitled “Constrained simultaneous algebraic reconstruction technique (C-SART) – a new and simple algorithm for ionospheric tomography” has been accepted for publication in Earth, Planets and Space.
Posted in ionosphere, paper
Spring is coming!
Finally! Temperatures on the day-time have reached values which make it possible to walk around without thick jackets. Now the increasing power of the sun-light can be noticed day-by-day, what makes me hope that jerry blossom will start soon. Although…
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Posted in Uncategorized
Running a “nice” job
The nice –adjust=n [PGM] command sets the priority of a launched program. According to the manual… Usage: nice [OPTION] [COMMAND [ARG]…] Run COMMAND with an adjusted niceness, which affects process scheduling. With no COMMAND, print the current niceness. Nicenesses range…
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Posted in computer, programming
Gedit plugins
My favorite editor under gnome is Gedit, which can be extended to a powerful tool using some plugins. Beside the standard tools there are a variety of useful plugins.
Posted in computer, programming
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