Four short links: 27 March 2012

Four short links: 27 March 2012: Five Tough Lessons I Had To Learn About Healthcare (Andy Oram) -- I don't normally link to things from Radar but this gels 110% with my limited experience with the healthcare industry. Makematics: Math for Makers -- I want the hardware hackers who are building the next generation of DIY 3D printers to be able to turn topological algorithms...