QUES: Q: What is the name of the book in which Hayek presented the Hebbian Synapse?
A: In The Sensory Order: An Inquiry into the Foundations of Theoretical Psychology (1952), Hayek independently developed a "Hebbian learning" model of learning and memory an idea which he first conceived in 1920, prior to his study of economics.
Does the answer answer the question?

ANS: yes

QUES: Q: How can low frequencies be obtained?
A: They must be converted from utility power by motor-generators or static inverters at the feeding substations or generated at dedicated traction powerstations.
Does the answer answer the question?

ANS: yes

QUES: Q: Where did a cargo train derail as a result?
A: Meanwhile, a cargo train carrying 13 petrol tanks derailed in Hui County, Gansu, and caught on fire after the rail was distorted.
Does the answer answer the question?

ANS: yes

QUES: Q: What is the main application of these set ups?
A: However a log-periodic dipole array consists of a number of dipole elements of different lengths in order to obtain a somewhat directional antenna having an extremely wide bandwidth: these are frequently used for television reception in fringe areas.
Does the answer answer the question?

ANS:
yes