00000nam a2200000 a 4500 20251203115448.0 PAU _ Paul Rodrigues Kuppuswami S Performance Amelioration of object oriented databases Pondicherry Dept. of Computer Science, Pondicherry University Computer science object oriented databases-Indexing,IB-tree ,versioning mechanism and Common design patterns Ph.D Prof.and Head. ENG _ The performance of object oriented database system is found to be poor due to lack of proper indexing techniques,versioning mechanism and common design patterns. In this thesis a hybrid-indexing model is proposed using the digital properties and relational properties of the keys for object oriented databases.Simulation results show on an average a50% improvement in disk access time compared to CH and Sc indexing models. Due to the evolutionary nature of design products,it is difficult to provide adequate support for versioning of design products.A new model that integrates collaborative design model with version semantics is proposed in this thesis. Two new patterns are mind from a communication-monitoring tool called netsneaker.Apart from this three new patterns from different security models have been mined. T1795 R T1796 R 212391 212391 0 0 0 1 PU PU 2001-09-07 0 PAU _ T1795 R 0 0 0 1 PU PU 2001-09-07 0 PAU _ T1796 R