Opinion
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Ideology: What is it, why have it?

Most of this article was conceived and written back in the early 1970s. It is excerpted from a book published in 1974. The book was and is titled What Is To Be Undone, a word play on Lenin’s famous ...
Abstract: Seismic full waveform inversion (FWI) is a powerful technique for generating high-resolution images of the subsurface, leveraging the rich information content in recorded seismic waveforms.