The IMCPSE-4 meeting continued the discussions started in 1992, when this conference series was started. The proceedings of IMCPSE-4 conference contain developments in the area of the effects of the space environment on materials and structures in the low Earth orbit and on ways to prevent and/or reduce them. The main mandate of the meeting, as in the past years was to: promote the dissemination of experimental data and experience among research organizations, and scientists gathered in ground and flight experiments; provide a tool for engineers, material scientists, and management in space and aerospace sectors to learn about advances in the field of material's and structures' protection in LEO environment and to provide a basis for interaction and utilization of each others' capabilities in cross pollenization of ideas; review the latest research and development in topics such as: effects of LEO environment on materials and structures, predictive models for interaction of materials with LEO environment factors, and alternative ways for protection from LEO environment.
