1. Research Fellow, Dept. of Civil Engineering and Architecture, Univ. of Pavia, Pavia 27100, Italy (corresponding author). ORCID: .
2. Assistant Professor, Dept. of Civil Engineering, Univ. of Tokyo, Tokyo 113-8656, Japan. ORCID: .
3. Professor of Particulate Soil Mechanics, Dept. of Civil and Environmental Engineering, Imperial College London, London SW7 2AZ, UK.
4. Senior Lecturer, Dept. of Physics, Imperial College London, London, UK; Dept. of Materials, Imperial College London, London SW7 2AZ, UK.
5. Senior Lecturer, Dept. of Materials, Imperial College London, London SW7 2AZ, UK. ORCID: .