links for 2011-09-08

• SPIN Farming Basics: a book review » Transition Culture
  Review of an interesting book arguing that urban farming is a profitable business to run. Surely there are plenty of candidate sites in Liverpool? It'd be lovely if the Urban Gardening Group at DoES tied up with Transition Town Liverpool and spawned some businesses to do that...
  (tags: urban farming sustainability)
• circuit design - Differentiate between clapping and talking - Electrical Engineering - Stack Exchange
  Might come in handy for the next time I want an Arduino to detect some sound events
  (tags: hardware algorithm sound analysis)