Roland's homepage

My random knot in the Web


This is my home in the virtual world, where I write about things that I want to share. The freely available software that I've written as well as some of the photographs I've taken over the years can also be found here. Please use the navigation links on the right if you are looking for something.

Recent articles

  1. Switching to the vim editor

    date: 2016-01-10
    original date: 2013-08-17
    category: howto
    tags: vim editor

    After having been an emacs user for a long time, I was starting to grow disenchanted with it around version 24. My main problem is that it was starting to get really slow. Not just in starting up, but also in daily use, specially it you kept an instance open ...

  2. Using a scanner for macro photography

    Although you wouldn’t guess it from the contents of this blog, my day job involves the design and production of products from fiber reinforced composites. A lot of my projects fall under non-disclosure agreements, so I cannot discuss them here.

    What I can do is share some of the methods I’ve developed over the years. One of those is using a desktop scanner to make close-ups.

  3. lamprop

    (tl;dr: download the latest version from github.)


    The purpose of this program is to calculate some properties of fiber-reinforced composite laminates. It calculates:

    • engineering properties like \(E_x\), \(E_y\), \(G_{xy}\)
    • thermal properties \(\alpha_x\) and \(\alpha_y\)
    • physical properties like density (\(\rho\)) and laminate thickness (\(t\))
    • stiffness (or ABD) and ...
  4. Python bindings for libmagic

    This documents how I installed Python bindings for libmagic.

    There are actually different bindings for libmagic. One set is part of the original distribution. It can be found in /usr/src/contrib/file/python/. But in my opinion it is somewhat cumbersome to use and not very Pythonic.

    The implementation from ahupp/python-magic in Github feels more natural.

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