Four short links: 23 June 2015

Fast Lomb-Scargle Periodograms in Python — a classic method for finding periodicity in irregularly-sampled data.
Facebook Bluetooth Beacons — free for you to use and help people see more information about your business whenever they use Facebook during their visit.
Industry 4.0 — stop gagging at the term. Interesting examples of connectivity and data improving manufacturing. Human-machine interfaces: Logistics company Knapp AG developed a picking technology using augmented reality. Pickers wear a headset that presents vital information on a see-through display, helping them locate items more quickly and precisely. And with both hands free, they can build stronger and more efficient pallets, with fragile items safeguarded. An integrated camera captures serial and lot ID numbers for real-time stock tracking. Error rates are down by 40%, among many other benefits. Digital-to-physical transfer: Local Motors builds cars almost entirely through 3-D printing, with a design crowdsourced from an online community. It can build a new model from scratch in a year, far less than the industry average of six. Vauxhall and GM, among others, still bend a lot of metal, but also use 3-D printing and rapid prototyping to minimize their time to market. (via Quartz)
runC — a lightweight universal runtime container, by the Open Container Project. (OCP = multi-vendor initiative in hands of Linux Foundation)

See more editions of Four Short Links...

Irregular Periodicity, Facebook Beacons, Industry 4.0, and Universal Container