Long-time CWP collaborator Dr. Kees Wapenaar, of Delft University, celebrated his retirement from Delft University this month. Dr. Wapenaar has a long collaboration with CWP Director Roel Snieder on a variety of projects. They published 35 joint papers; for details you can visit https://inside.mines.edu/~rsnieder/Publications.html. Dr. Wapenaar will remain active in research.
In this photo, Dr. Wapenaar demonstrates his specific walking sound while Roel Snieder struggles to hear this sound (he failed).
We wish Dr. Wapenaar all the best in his retirement.