This volume contains the text of four sets of lectures delivered at the
third session of the Summer School organized by C.I.M.E. (Centro
Internazionale Matematico Estivo). These texts are preceded by an
introduction written by C. Cercignani and M. Pulvirenti which summarizes
the present status in the area of Nonequilibrium Problems in
Many-Particle Systems and tries to put the contents of the different
sets of lectures in the right perspective, in order to orient the
reader. The lectures deal with the global existence of weak solutions
for kinetic models and related topics, the basic concepts of
non-standard analysis and their application to gas kinetics, the kinetic
equations for semiconductors and the entropy methods in the study of
hydrodynamic limits. CONTENTS: C. Cercignani, M. Pulvirenti:
Nonequilibrium Problems in Many-Particle Systems. An Introduction.- L.
Arkeryd: Some Examples of NSA in Kinetic Theory.- P.L. Lions: Global
Solutions of Kinetic Models and Related Problems.- P.A. Markowich:
Kinetic Models for Semiconductors.- S.R.S. Varadhan: Entropy Methods in
Hydrodynamic Scaling.