Four short links: 13 February 2014
Open Web Ranking, Quantified Self Gadgets, Armband Input, and Bitcoin Exchanges Threatened
- The Common Crawl WWW Ranking — open data, open methodology, behind an open ranking of the top sites on the web. Preprint paper available. (via Slashdot)
- Felton’s Sensors (Quartz) — inside the gadgets Nicholas Felton uses to quantify himself.
- Myo Armband (IEEE Spectrum) — armband input device with eight EMG (electromyography) muscle activity sensors along with a nine-axis inertial measurement unit (that’s three axes each for accelerometer, gyro, and magnetometer), meaning that you get forearm gesture sensing along with relative motion sensing (as opposed to absolute position). The EMG sensors pick up on the electrical potential generated by muscle cells, and with the Myo on your forearm, the sensors can read all of the muscles that control your fingers, letting them spy on finger position as well as grip strength.
- Bitcoin Exchanges Under Massive and Concerted Attack — he who lives by the network dies by the network. a DDoS attack is taking Bitcoin’s transaction malleability problem and applying it to many transactions in the network, simultaneously. “So as transactions are being created, malformed/parallel transactions are also being created so as to create a fog of confusion over the entire network, which then affects almost every single implementation out there,” he added. Antonopoulos went on to say that Blockchain.info’s implementation is not affected, but some exchanges have been affected – their internal accounting systems are gradually going out of sync with the network.