How I found the Googloson and why it has negative Energy

I have finally found the Googloson with my self-made Small Googtron Collidor (SGC) – I even had the time to make a photo of it to show you that it is not a fake (see below). Everyone will say I’ve gimped that, but no, I didn’t. Really. I have developed a theoretical proof of the existence of … Continue reading

Spatial Keys – Memory Efficient Geohashes

When you are operating on geographical data you’ll use latitude and longitude to specify a location somewhere on earth. To look up some associated information or if you want to do neighborhood searches you could create R-trees, quad-trees or similar spatial data structures to make them efficient. Some people are using Geohashes instead because then … Continue reading

Free Online Graph Theory Books and Resources

A link compilation of some Hackernews and Stackoverflow posts and a longish personal investigation. The DaMN book and its companion book Graph Theory with Applications, J.A. Bondy and U.S.R. Murty Graph Theory, Reinhard Diestel Graph Theory Tutorials Digraphs: Theory, Algorithms and Applications, 1st Edition Wikipedia – Graph Algorithms Algorithms and Complexity, Herbert S. Wilf Lecture … Continue reading

Rage Against the Android #eclipse

Developing Android applications on Linux with Eclipse sometimes can get really ugly. Sadly neither NetBeans which has a really nice Android plugin, but cannot execute a single test nor IDEA can rescue me or make me switching :( but probably they wouldn’t rescue me due to problems of Android development kit itself – I’m not … Continue reading

Bird’s Eye View on ElasticSearch its Query DSL

I’ve copied the whole post into a gist so that you can simply clone, copy and paste the important stuff and even could contribute easily. Several times per month there pop up questions regarding the query structure on the ElasticSearch user group. Although there are good docs explaining this in depth probably the bird view … Continue reading