Philippa Gardner - Böcker

This volume contains the proceedings of the 15th International Conference on Concurrency Theory (CONCUR 2004) held in the Royal Society, London, UK, from the 31st August to the 3rd September, 2004. ThepurposeoftheCONCURconferencesistobringtogetherresearchers,- velopersandstudentsinordertoadvancethetheoryofconcurrencyandpromote its applications. Interest in this topic is continually growing, as a consequence of theimportanceandubiquityofconcurrentsystemsandtheirapplications,andof the scienti?c relevance of their foundations. The scope covers all areas of sem- tics, logics, and veri?cation techniques for concurrent systems. Topics include concurrency-related aspects of: models of computation, semantic domains, p- cess algebras, Petri nets, event structures, real-time systems, hybrid systems, - cidability, model-checking, veri?cation techniques, re?nement techniques, term and graph rewriting, distributed programming, logic constraint programming, object-oriented programming, typing systems and algorithms, case studies, tools and environments for programming and veri?cation.This volume starts with four invited papers from Sriram Rajamani, Steve Brookes, Bengt Jonsson and Peter O'Hearn. The remaining 29 papers were - lected by the program committee from 134 submissions, a record number of submissions to CONCUR. The standard was extremely high and the selection di?cult. Each submission received at least three reports, reviewed by the p- gram committee members or their subreferees. Once the initial reviews were available, we had 16 days for paper selection and con?ict resolution. We would like to thank all members of the CONCUR 2004 Program Committee for their excellent work throughout the intensive selection process, together with many subreferees who assisted us in the evaluation of the submitted papers.

This volume contains the proceedings of the 12th International Symposium on Database Programming Languages (DBPL 2009), held in Lyon, France on - gust 24, 2009,and co-locatedwith VLDB (the International Conference on Very Large Data Bases). DBPL continues to present high-quality work at the intersection of database and programming language research. This proceedings volume contains the six papersacceptedforDBPL2009,whichwereselectedbytheProgramCommittee. Every submission was reviewed by at least three members of the committee. In addition, we sought the opinions of external referees, chosen because of their expertise in a particular topic. We would like to thank all the authorswho submitted papers to DBPL 2009. We also thank the members of the Program Committee for their excellent work during the electronic selection meeting. We are grateful to Andrei Voronkov for his EasyChair system, which made these discussions comparatively straightf- ward. WewouldliketothankMarceloArenasandMichaelI.Schwartzbachfortheir assistanceandsoundcouncilasProgramChairsofDBPL2007.We?nallythank Mohand-Said Hacid and Jean-Marc Petit for their superb local organization of DBPL 2009.