Parallel database systems have to support both inter-transaction as well as intra-transaction parallelism. Inter-transaction parallelism (multi-user mode) is required to achieve high throughput, in particular for OLTP transactions, and sufficient cost-effectiveness. Intra-transaction parallelism is a prerequisite for reducing the response time of complex and data-intensive transactions (queries...

A significant interest for Web process design is to discover the discrepancies between the users' transaction process sequences and the desired process sequence for the Web transaction process. Sequence data analysis has been an important approach to analyzing Web log data in the e-commerce field. There have been many methods for sequence data analysis; however, few existing methods can be appl...

In [STON93] we proposed a new user interface paradigm called Tioga for interacting with database management systems. Tioga simplifies the task of building database applications and is geared especially towards the needs of scientific users. We borrow the "boxes and arrows" visual programming notation of scientific visualization systems and allow users to graphically construct applications by us...

This paper describes a scheduling technique for parallel database systems to obtain high performance, both in terms of response time and throughput. The technique enables both intra-and inter-transaction paralMism while controlling concurrency between transactions correctly. Scheduling is performed dynamically at transaction execution time, taking into account dynamic aspects of the execution a...

The global inter-site constraints is to describe the integrity constraints associated with data items in diierent local databases, which specify the global connguration of the data that are considered semantically correct. Locally consistent transactions may generate global inconsistencies with the existence of global integrity constraints. Hence, we need the global transaction manager that ens...

The collaborative business process can be unreliable when business partners collaborate in a peer-to-peer fashion without central control. Therefore, an important issue that needs to be dealt with for any generic solution to manage collaborative business transaction is reliability verification. In this paper, we propose a novel Choreographical Business Transaction Net (CoBTx-Net) to specify col...

This paper integrates theoretical concepts from transaction cost economics, organization theory and political economy to develop a conceptual framework to guide research on inter-organizational coordination strategies, particularly those that explicitly leverage IT capabilities. We outline research directions and approaches to bridge the requirements of theory building and theory testing. A Fra...

We have proposed an improved concurrency control protocol for nested transactions based on speculation. In the proposed speculative nested locking (SNL) protocol, whenever a sub-transaction finishes work with a data object (produces after-image), it's parent inherits the lock. The waiting sub-transaction carries out speculative executions by accessing both beforeand after-images of preceding su...