Hi HN, I'm the author of this paper.<p>As it turns out, I posted it and answered a few questions about it on HN a few days ago, on this thread:<p><a href="https://news.ycombinator.com/item?id=21397444" rel="nofollow">https://news.ycombinator.com/item?id=21397444</a><p>Please feel free to ask questions here too. I would be happy to answer them.