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My random knot in the Web

Articles about miscellaneous

  1. Enjoying the sunshine

    On the 8th and 9th of March 2014 it was unseasonably warm. In fact the temperatures on both days have been the warmest on those dates since recording began in 1901.

    Here in Eindhoven the temperature reached 21 °C today! So I got out the lawn-chair and enjoyed the sunshine …

  2. Laptop repair

    In November my four-year old laptop started acting up. First it shut itself down a couple of times when doing heavy calculations. Later the screen started showing artefacts in text mode and would hang the X server. I bought this machine from BTO because they offered quite a lot of …

  3. Making my first EPUB

    Now that I got an EPUB reader, I started looking for a way to make EPUB documents.

    In principle, an EPUB file is a zipfile with a certain layout, as can be seen on the wikipedia page linked above.

    The actual contents are just XHTML, while the metadata files are …

  4. Filtering a sound recording

    Recently I was listening to an MP3 file of a talk about no-till gardening when I noticed that there was a noticable buzz in the sound. I figured I would try my hand at sound filtering with Python as a learning experience.

    The Python standard library doesn’t have a …

  5. Headphone repair

    For listening to music and watching movies on a PC, I prefer headphones. Years ago, I bought a Sennheiser HD 280 PRO, which I like very much. It sounds good and really attenuates external noise well (32 dB).

    Sadly though, the earpieces were disintegrating after years of service. As soon …

  6. Evaluating REACH

    One of my responsibilities at work is to act as local expert with regard to chemical substances. One of the tasks is making sure we comply with REACH (“Registration, Evaluation, Authorisation and restriction of CHemical substances”).

    The REACH directive itself is huge, numbering 515 pages in the Dutch version. In …

  7. Switch to pelican website generator

    If this website looks different, it is probably because I switched to the pelican website generator to create it.

    When I started my website, I edited the html files by hand in emacs. I kept that up for a long time, even after blogging software became available.

    Relatively recently, I …


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