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Chapter 2 of my free online book about “Neural Networks and Deep Learning” is now available. The chapter is an in-depth explanation of the backpropagation algorithm. Backpropagation is the workhorse of learning in neural networks,…
My new essay on the use of digital media to explain scientific ideas is here.
Many thousands of articles have been written purporting to explain Bitcoin, the online, peer-to-peer currency. Most of those articles give a hand-wavy account of the underlying cryptographic protocol, omitting many details. Even those articles which…
I am delighted to announce that the first chapter of my book “Neural Networks and Deep Learning” is now freely available online here. The chapter explains the basic ideas behind neural networks, including how they…
Imagine you’re a programmer who is developing a new web browser. There are many malicious sites on the web, and you want your browser to warn users when they attempt to access dangerous sites. For…
More precisely, I crawled 250,113,669 pages for just under 580 dollars in 39 hours and 25 minutes, using 20 Amazon EC2 machine instances. I carried out this project because (among several other reasons) I wanted…
It’s tempting to think IBM’s Jeopardy-playing machine Watson must have relied on some huge algorithmic advance or silver bullet idea in order to beat top human Jeopardy players. But the researchers behind Watson have written…
In 2011, IBM got a lot of publicity when it demonstrated a computer named Watson, which was designed to answer questions on the game show Jeopardy. Watson was good enough to be competitive with (and…
On my first day of physics graduate school, the professor in my class on electromagnetism began by stepping to the board, and wordlessly writing four equations: He stepped back, turned around, and said something like…
Suppose I add a hyperlink from a webpage to a webpage . In principle, adding that single hyperlink changes the PageRank not just of those two pages, but potentially of nearly every other page on…
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