a) Modeling of soils: elasto-visco (creep, relaxation, rate effect)-cyclic-plastic behavior of soils. b) FEM simulations of geotechnical problems: interaction of earthquake fault rupture-sand deposit-structure, soil-structure interaction, seepage, excavation, anchor foundations, etc, in relation to progressive failure, scale effect and parametric study. c) Soil stabilization (RAPs, Gravel Column, Admixtures) d) Genetic Algorithms in optimizations and Artificial Neural Network in predictions of geotechnical problems. e) Cement based composites.