The conference received 184 submissions, and all were reviewed by the ProgramCommittee. Each paper was assigned at least three reviewers, while submissionsco-authored by Program Committee members were reviewed by at leastfive people. All submissions were anonymous, and the identity of the authorswere not revealed to committee members. During the first phase of the reviewprocess, the Program Committee, aided by reports from 142 external reviewers,produced a total of 611 reviews in all. Then, committee members discussed thesepapers in depth over a period of 8 weeks using an electronic messaging system,in the process writing 1,400 discussion messages. After careful deliberation, theProgram Committee selected 32 papers for presentation. The authors of acceptedpapers were given 5 weeks to prepare final versions for these proceedings. Theserevised papers were not subject to editorial review and the authors bear fullresponsibility for their contents.