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Very brief history of the RAMHAND-type experiments is presented. Some distinctive features of the Kalyazin experiment is described, and the first results obtained in it are discussed.

The sensitivity of an ice radiowave detector to the anticipated high energy neutrino fluxes is calculated on the basis of a detailed threshold analysis and computation of the shower production rate. We show that diffuse neutrinos from Active Galactic Nuclei could be detectable in a radio detector of 1 km 2 area established in Central Antarctica.