Efficiently recovering data from a bad DVD

Recently I had to get data, mostly tar files, from a backup DVD made 7 years ago. As it turned out, the DVD was mostly unreadable, the filenames appeared but reading the content resulted in I/O errors. So I ... Read more »


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    Building the H-1 3D printer

    This is a 11-part video recording of the DIY build of the SeeMeCNC H-1 3D printer from 2013. The H-1 was an early, quite affordable (~350$) kit based on the reprap Huxley, and the first available kit using injection-molded plastic ... Read more »

    Review of freelance websites

    Comparison The following is a list of freelancer's websites that I have used or considered. I am not too happy with some of them. Information about fees is notoriously difficult to find in most cases. The site "Freelancer.com" even ... Read more »


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    MOOCs MOOCs MOOCs. I like them. Here's the list of MOOCs I completed in the recent years. The list of the MOOCs I've done recently. Course Link University Points Certificate Remarks Machine Learning ml-class.org Stanford 87.5/80, 800/ ... Read more »