In recent years, the rapid changes in social trends and technologies, such as digital transformation and energy transition, have had a large impact on many industries. Future forecasts and exploration of potential values become indispensable for dealing with such changes and achieving the success of novel research and/or business. In this paper, we discuss an approach to evaluate the diffusion of innovative technologies to other fields using the network data in academic articles citing a review paper. This study provides a case study of full waveform inversion as an example in exploration geophysics to demonstrate the effectiveness of the approach by using the Web of Science database. This analysis enables us to forecast the trend of technologies by analyzing the diffusion of the other technologies as well as full waveform inversion. ... Read more

In this paper, we discuss an omni-directional extension of seismic modeling based on the one-way propagator to take into account not only reflected waves but also horizontally propagating waves, such as refracted waves, diving waves and duplex waves. Then, we present a novel seismic migration and tomography method to simultaneously exploit reflected waves including internal multiples and horizontal waves by formulating an omni-directional extension of so-called joint migration inversion process, which is a seismic imaging algorithm based on one-way propagators, used in a two-way mode, to estimate both velocity and reflectivity models by exploiting reflected waves, including internal multiples and transmission effects. Finally, initial numerical results are shown to demonstrate the validity of this method. ... Read more