Specific hardware or whether the project will be single vs fixed tracking wasn't noted in the document — though almost all utility scale projects in the southwest are using single axis trackers these days. (pv-magazine-usa.com)
Establishment of a robust single axis of cell polarity by coupling multiple positive feedback loops. (biologie.uni-osnabrueck.de)
Horseshoe theory suffers from a host of issues, among them the vagueness and uselessness of «left - right» single axis measurement; as well as its lack of predictiveness. (politics.stackexchange.com)