K. Scherer - Böcker

Appraisal theory has become one of the most active aproaches in the domain of emotion psychology. The appraisal process consists of the subjective evaluation that occurs during the individual's encounter with significant events in the environment, thus determining the nature of the emotional reaction and experience. The organism's interpretation of events and situations elicits and differentiates its emotional responses, although the exact processes involved and the limits of the theory are still a matter of debate and are currently the object of active research. This volume is intended to become the primary source of information on appraisal for all those interested in emotion, from beginning graduate students to accomplished researchers in emotion psychology.

The eleventh COSPAR colloquium The Outer Heliosphere: The Next Frontiers was held in Potsdam, Germany, from 24-28 July, 2000, and is the second dedicated to this subject after the first one held in Warsaw, Poland in 1989.Roughly a century has passed after the first ideas by Oliver Lodge, George Francis Fitzgerald and Kristan Birkeland about particle clouds emanating from the Sun and interacting with the Earth environment. Only a few decades after the formulation of the concepts of a continuous solar corpuscular radiation by Ludwig Bierman and a solar wind by Eugene Parker, heliospheric physics has evolved into an important branch of astrophysical research. Numerous spacecraft missions have increased the knowledge about the heliosphere tremendously. Now, at the beginning of a new millenium it seems possible, by newly developed propulasion technologies to send a spacecraft beyond the boundaries of the heliosphere. Such an Interstellar Proce will start the in-situ exploration of interstellar space and, thus, can be considered as the first true astrophysical spacecraft. The year 2000 appeared to be a highly welcome occassion to review the achievements since the last COSPAR Colloquia 11 years ago, to summarize the present developments and to give new impulse for future activities in heliospheric research.