Scuba (PDF) — paper from Facebook about their millions-of-rows/second in-memory event database Scuba stores data completely in memory on hundreds of servers, each with 144 GB RAM. I’m boggling at that scale.
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4 Years of MOOC Data — Harvard and MIT MOOC data analyzed. MOOCs educate thousands and certify hundreds. The median number of active participants in a course is 7,902; another 1,517 are considered “explorers” — those who explore half or more of the course content. […] Among those who stated up front that they intended to become certified, the median certification rate was 30%. Among those who paid for identity verification as part of the process of becoming certified, the median completion was 60%.
Predicting Medical AI in 2017 — interested me for this rule of thumb: the chance of an eventual clinical product and the time until that product is available will be:
Preclinical complete: 5% chance, 10 years
Phase I complete: 10% chance, 8 years
Phase II complete: 50% chance, 5 years
Phase III complete: 80% chance, 1 year.