Why has Serata Probe taken so long to get global recognition?
The reason is the time-consuming effort required to overcome difficulties with the elasticity assumption, on which the original Serata Probe (Double-Fracture Method) was based. It took more than two decade of intense R&D work to replace the fallacious elasticity assumption of earth media with the newly invented force balance principle (Single-Fracture Method) to completely overcome the impasse of half-century.
