Hi everyone. I'm not sure if anyone from here on PF are familiar with Sir David Mackay, but he was a physicist and mathematician known for his contributions in information theory and machine learning, as well as serving as Chief Scientific Advisor of the Department of Energy and Climate Change in the UK. He had also penned a book "Without Hot Air" about energy consumption and energy production without fossil fuels. Unfortunately, he has succumbed to stomach cancer and passed away last week. https://en.wikipedia.org/wiki/David_J._C._MacKay http://www.thetimes.co.uk/tto/opinion/obituaries/article4736379.ece Here is a link to his (former) webpage. http://www.inference.phy.cam.ac.uk/mackay/ Here is also his blog outlining his struggle with stomach cancer, with a last post from him 2 days before his passing. http://itila.blogspot.com/ RIP, Sir David.