Logistics and Time Scheduled for Talks At a given time, we plan to have an average attendance of 25-30 people at the workshop. However, some of the participants may take part either in the first or in the second week of the workshop (cca 5-10 persons each week), resulting in cca 20 persons staying for two weeks, and cca 10-20 persons staying for only one week. This would allow us to have a flexible schedule. There should be 4 sessions of 1.5 hours each (45 minutes of presentation by one person plus 45 minutes discussion) per day, mondays through fridays, adding up to a total of about 40 seminars. This would allow for each participant to give one presentation which could be explained and discussed in detail. The remaining sessions shall be in some way reserved for summarizing the results of the discussions. Based on previous experience we expect this to provide a lively and effective workshop atmosphere.