50 megawatts of #sodium-ion utility-scale power storage totaling 200MWh of #energy in Qianjiang, Hubei, #China, built by HiNa Battery, developed by Datang Hubei Energy Development, came online in July #energy #energy-storage
Chamberlin and Boyce’s 01974 #paper #PDF about #SQL, then SEQUEL, including their previous query language SQUARE, which seems to be based on binary relations (“mappings”). #history of #databases
Beej’s Guide to Network Programming as one HTML page. #tutorial #documents
#video on a very ingenious discrete-only transistor curve tracer with 21 discrete components. #electronics #hardware