4:08 Computational challenges and opportunities of astronomical big data, Melanie Johnston-Hollitt O'Reilly
4:16 JD.com security intelligence and analytics: From big data to big impact - Tony Lee (JD.com) O'Reilly
2:24 Mining electronic health records and the web for drug repurposing, Kira Radinsky (eBay | Technion) O'Reilly