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Homeschool Wednesday: Rates of Change

In case you come here only on Wednesdays when I write about homeschooling, you might also want to check out Tech Tuesdays (a series that goes back several years). In yesterday’s Tech Tuesday I wrote about computational complexity and gave [...]  Read more

More Bitcoin as Protocol

A couple of weeks ago I wrote a post on bitcoin as protocol that got a couple of hundred comments from which I learned a lot. This is an important topic and Chris Dixon has done a lot of good [...]  Read more

Technology for Train Safety

There have been a spate of deadly train derailments including two in the summer (one in Spain and one in Canada) most recently the Metro North one. Human error played a significant role in all of these. For instance, in [...]  Read more