Stephan Paukner :: syslog

Der Arzt befindet sich in Untersuchungshaft.¹
Reineke Fuchs befindet sich in Fabelhaft.
Das Wetter befindet sich in Wechselhaft.
Der Sträfling befindet sich in Musterhaft.²
Der Gefangene befindet sich in Gefangensc-Haft.
Der Lehrer befindet sich in Vorbildhaft.
Die Spinnerin am Kreuz befindet sich in Sagenhaft.
Der Gläubige befindet sich in Sündhaft.
Der Gottlose befindet sich in Glaubhaft.
Das Leben befindet sich in Sinnhaft.
Das Exemplar befindet sich in Beispielhaft.
Der Sponsor befindet sich in Gönnerhaft.
Der Repetent befindet sich in Mangelhaft.
Der Sänger befindet sich in Stimmhaft.
Der Wagen befindet sich in Schadhaft.
Schneewittchen befindet sich in Märchenhaft.
Der Kämpfer befindet sich in Heldenhaft.
Die Elfe befindet sich in Zauberhaft.
Barbie befindet sich in Puppenhaft.
Der Hundefreund befindet sich in Katzenhaft. (Naja)
Der Geistliche befindet sich in Geisterhaft.
Der Ängstliche befindet sich in Gespensterhaft.
Die Gräser befinden sich in Frühlingshaft.
Der Clown befindet sich in Lachhaft.
Die Tratschtante befindet sich in Schwatzhaft.
Der Korrektor befindet sich in Fehlerhaft.
Die Braut befindet sich in Schleierhaft.
Der Wachposten befindet sich in Standhaft.
Der Maler befindet sich in Bildhaft.
Die Fettleibigen befinden sich in Massenhaft.
Der Karateka befindet sich in Wehrhaft.

I posted my question to comp.os.linux.security and continued the discussion on the Serendipity mailing list. For the sake of documentation and to provide another spot in the net with a solution, I repeat the posting here:

I wondered about strange HTTP connections from 127.0.0.1 appearing in my access.log at irregular times:

What irritated me was that those requests originate locally, are invalid (400 = Bad Request) and have no User-Agent identification string. [...]

I finally found out that this ought to be Apache-2.2’s internal dummy connections. They had the above form as long as my Apache-SSL config looked like

Now, I use the IP instead of the ‘*’ and—lo and behold—the requests transform into

I didn’t want to spend much time trying to understand what that dummy connections are good for. It seems like Apache2 kills some of its children such that the number of MaxSpareServers isn’t exceeded. And I wasn’t aware that the Apache syntax ‘*:443’ is somehow deprecated.

HGFei is leaving Austria in summer 2007 to go to Australia until Christmas 2007. I’d have to have my thesis finished by the end of June 2007. He asked me to give a schedule to be able to finish it by the end of the current term. Of course, regarding my scholarship, I should have finished it by July 2007 anyway. But I currently don’t know what the schedule could look like. I don’t know what my thesis could or should look like in the end, and therefore I don’t know what path to take to go there, and therefore I don’t really know my next steps. He said I shouldn’t be too ambitious and should produce a spate of demos now. But I don’t actually know what these should demonstrate. Maybe that kind of panic is somehow natural, but I’m not comfortable with that. Sure, I have time now for doing my thesis, and I really have to make use of it. I still have plenty of literature to read.

What I had done in February was starting to write the introductory chapter with LaTeX. That was a step what had to be done anyway, I can concentrate mostly on the content now. I wrote some pages about the foundations of TF-analysis, including some more side notes that are usually not mentioned in the other Master’s theses at my institute. As one of the next things I want to get familiar with the computing language of MATLAB/Octave. During the last days I did some experiments with FFT2, and I might write down some results here in the blog. Now I know how to do different things in Octave, I produced some pictures and rendered them to videos. This might provide some munition for doing 2D-Gabor Analysis.

Now I should look how to finally do image processing using Gabor Analysis methods. In our last conversation at the end of December 2006, HGFei told me some results on how to use the 1D-algorithms for higher dimensions, because their tools actually only provide algorithms for 1D-signals. I’d be the first to actually use that in the 2D-case. To understand how this is obtained I’d have to be familiar with the basics of GA on groups—a rather abstract approach. And mapping 1D to 2D implies that I can do it in the 1D case also. At least, if I can’t provide a schedule and don’t know how to be done by the end of this term, I know what my next steps are.

He also mentioned that I simply should do some basic experminents such as thresholding, i.e., doing reconstructions by leaving out coefficients with low contribution; this is a leering to the task of image compression.

Tomorrow, the summer term is starting, and I’ll attend HGFei’s project seminar on numerical harmonic analysis, where we’ll have to approach different problems using MATLAB.