This set of survey talks presented to graduate students serves as a thorough exposition of the subject. The study of complex fluids (with internal structure) is important for theoretical purposes but also, and maybe even more so, for applied research. The reader will find papers on colloid mixtures, the structure of DNA mesophases, ferrofluids, chain dynamics, liquid crystals, computer simulations of macromolecules, fluidization, emulsions, relaxations and many other related topics.

Combined for researchers and graduate students the articles from the Sitges Summer School together form an excellent survey of the applications of neural-network theory to statistical mechanics and computer-science biophysics. Various mathematical models are presented together with their interpretation, especially those to do with collective behaviour, learning and storage capacity, and dynamical stability.