Nowadays, a responsible administrator should never run any service without TLS anymore. Unfortunately, this makes life even more difficult for several reasons. This article discusses some problems associated to certificates, specifically in respect to web applications which interactively connect to secondary services.
This article explains how to calculate the control points for B-Splines. The basic idea is that we want to interpolate a smooth curve into a set of points. B-Splines are a sequence of Bezier curves which solve that problem. But each Bezier curve is defined by four points: the start and end point and two control points which define the final appearance of a curve segment.
I wrote a sample program which can be downloaded directly here. If you quickly want to use it, simply look at the code and its comments. If your are interested in the background go ahead and read this article 🙂 Continue reading
This article is a step-by-step guide to render your own sea charts. I assume that you have already installed it to your system. If not, download the latest version and run
make install as usual. Make sure that you have installed the packages
OwnCloud is a nice cloud solution which is based on free software. It allows companies and users to run their own cloud services thereby not loosing the control on their data. Every day this gets more and more important and you loose control if you use commercial cloud services such as Google, Microsoft, or Amazon.
OwnCloud allows to synchronize contacts, calendars, email, files, and has many more features. Unfortunately, there is no real-time background synchronization of folders, yet.
Syncthing is a folder sharing system which allows real-time synchronization of shared folders between your devices and others. Basically it works similar to Dropbox, but again, syncthing is free software, which Dropbox is not. Thus you control to who and where your data goes, which in fact is not known for Dropbox.
Combining both, ownCloud and syncthing actually adds background folder synchronization to the ownCloud features. Please also read update at the end of this article! Continue reading
Some time ago I wrote this article about the build chain for assembler programming on Arduino. The article contained a simple blinking LED example. In the meanwhile I got several questions about Arduino and assembler.
After doing another course in C programming there is a new lesson. There are some hints on programming and most of them apply to any language, not just C. The following rules are recommendations which are true in most cases (but not all). You might also be interested in reading part I and part II of this series. Continue reading
It was in the late ’80s when I started to become interested in fractals. At the time then computers very unbelievable slow compared to what we have today thus I tried to speed up the algorithms in several ways.
This article is about using integer operations to calculate fractal images, more specifically I’ll explain how to replace floating point operations by integer operations (It is not about the theory behind fractals. There’s a lot literature about that.). Continue reading
Smrender is a powerful, flexible, and modular rule-based rendering engine for OpenStreetmap data. Its primary development goal was and still is to develop a renderer for paper nautical charts. Because of its very generic and modular software design it can be used for charts of any map style and it is also perfectly suitable for data processing and manipulation tasks such as filtering, modification, and statistical analysis.
- Du stehst nicht nur auf Blümchensex, sondern auch auf Lack&Leder/Rollenspiele/Lingerie/Dildos/…?
- Du hast in der Firma etwas mitgehen lassen und daheim deine Werkstatt/deinen Schreibtisch/dein Baumaterial aufgebessert?
- Du hast in der Schule die Unterschrift deiner Eltern gefälscht?
- Du bist letztens alkoholisiert mit dem Auto gefahren?
- Du hast fürs Arbeiten Schwarzgeld kassiert?
- Du rauchst Gras?
- Du übertrittst regelmäßig Geschwindigkeitsbeschränkungen?
Warum plapperst du dann den „Ich-habe-nichts-zu-verbergen-Scheiß“ von so manchen Politikern nach, wenn du nach mehr Überwachung gefragt wirst und wählst Parteien, die nach noch mehr Überwachung schreien?
Das Internet und die digitale Welt sind nicht von Haus aus »gefährlich«, doch Politik und Konzerne bemühen sich sehr die seit Jahrzehnten verfügbaren Sicherheitstechnologien zu verhindern, da dadurch deren Überwachung und Geldgier eingeschränkt wird.