Original sentence: As part of his PHD thesis Dr Aahlad had developed a working model for performing active-active replication over a WAN.During the first four years of WANdisco's existence this theory was developed, resulting in the creating DconE, the building block for all of WANdisco's products, was created
Edited sentence: Part of Dr Aahlad's PHD Thesis concerned models for performing active-active replication over a WAN and it was during the first four years of WANdisco's existence that this theory was developed.The result in the creating DconE, the building block for all of WANdisco's products, was created