Volume I of the Proceedings includes the papers that were accepted through peer review for presentation as long papers. These papers were submitted in November 2010 and were reviewed by three anonymous reviewers. A member of the Program Committee then summarized the three reviews and wrote a recommendation. The three Program Committee Co-Chairs considered the reviews and recommendations—and in many cases read the papers. Based on this, they agreed on a list of 72 submissions to accept as long papers, grouping them into 18 sets of 4 thematically related papers that could be presented in the scheduled long-paper sessions. Out of 188 submissions of long papers, 72 (38%) were accepted as long papers, 45 (24%) as short papers, 48 (26%) as posters and 23 (12%) were rejected.