DISTRIBUTED AND PARALLEL DATABASES AN INTERNATIONAL JOURNAL See the file DAPD.INF for aims and scope, instructions for authors, and ordering information. CONTENTS VOLUME 1 VOLUME 1, ISSUE 4, October 1993 - Editorial, Ahmed K. Elmagarmid - Filippo Cacace, Stefano Ceri, Maurice Houtsma - A Survey of Parallel Execution Strategies for Transitive Closure and Logic Programs - James W. Stamos/Flaviu Cristian - Coordinator Log Transaction Execution Protocol - Maria E. Orlowska - Effective Utilization of Copies in a Transparent Distributed Environment VOLUME 1, ISSUE 3, July 1993 - Lin, - Concurrent Frame Signature Files - Kim/Choi/Gala/Scheevel, - On Resolving Schematic Heterogeneity in Multidatabase Systems - Tseng/Chen/Yang, - Answering Heterogeneous Database Queries with Degrees of Uncertainty - Kamel/Song/Kamel, - An Approach for Building an Integrated Environment for Molecular Biology Databases and Software Tools VOLUME 1, ISSUE 2, April 1993 SPECIAL ISSUE: Research topics in distributed and parallel databases Guest editor's introduction R. Agrawal - Parallel database systems: Open problems and new issues P. Valduriez - The performance of disk arrays in shared-memory database machines R.H. Katz, W. Hong - Real-time databases K. Ramamritham VOLUME 1, ISSUE 1, January 1993 Editorial A.K. Elmagarmid Guest editors' introduction H. Garcia-Molina H.V. Jagadish - Optimization of parallel query execution plans in XPRS W. Hong, M. Stonebraker - Practical prefetching techniques for multiprocessor file systems D. Kotz, C. Schlatter Ellis - A performance study of three high availability data replication strategies H.-I Hsiao, D.J. DeWitt - Distorted mapping techniques to achieve high performance in mirrored disk systems J.A. Solworth, C.U. Orji - Dataflow query execution in a parallel main-memory environment A.N. Wilschut, P.M.G. Apers Call for papers