 Complete the following phrase:  Professor Seeds published nearly 300 papers and reports on various topics on Geotechnical Engineering. His early research on pile-soil interaction, soil compaction and pavement formed the scientific basis for modern design. In the 1960s he established a new research area, geotechnical earthquake engineering, and he is commonly regarded as the founding father of this area. His pioneering works included the development of equivalent linear method SHAKE for seismic site response analysis, soil structure interaction analysis, evaluation and mitigation of soil liquefaction, etc. He investigated many major disasters, such as the 1964 