International Conference on the Hydraulic Transport of Solids in Pipes. International Conference on the Hydraulic Transport of Solids in Pipes International Conference on the Pneumatic Transport of Solids in Pipes International Conference on Urban Public Transportation Systems International Conference on the Physics of Solids at High Pressures International conference on intelligent transportation systems International Conference on the Theory and Applications of Cryptographic Techniques. International Conference on Urban Transport and the Environment International Conference on the Physics of Non-Crystalline Solids International Conference on the Physics of Non-crystalline Solids