Although support has been used as a fundamental measure to determine the statistical importance of an itemset, it can’t express other richer information such as quantity sold, unit profit, or other numerical attributes. To overcome the shortcoming, utility is used to measure the semantic importance and several algorithms for utility mining have been proposed. However, existing algorithms for ut...

This study builds on developments in transaction cost economics to examine how institutional environment and transaction (project) characteristics affect governance of inter-firm alliances. The focus is on the choice between equity and contractual alliance forms under differing regimes of intellectual property protection and other national institutional features. Empirical results identify tran...

We present a method for dependency and case structure analysis that captures the consistency between intra-clause relations (i.e., case structures or predicate-argument structures) and inter-clause relations. We assess intra-clause relations on the basis of case frames and inter-clause relations on the basis of transition knowledge between case frames. Both knowledge bases are automatically acq...

Global ocean salinity/temperature variations are attracting increasing attention, due to their influence on ocean-atmospheric changes and their potential for improved climate forecasting. The goal is to analyze historic salinity/temperature data to make predictions about future variations. Traditional statistical models that assume data independence are not applicable as ocean data are often in...

-In this demonstration we will show how our tool source code analysis, can be used to recover the highlevel structure of a software system directly from its source code. We accomplish this task by first using a source code analysis system (e.g., CIA, Acacia) to produce a module dependency graph that represents system modules and module-level inter-relationships. Keywords---source code, software...

The optimistic variants of MVCC (Multi-Version Concurrency Control) avoid blocking concurrent transactions at the cost of having a validation phase. Upon failure in the validation phase, the transaction is usually aborted and restarted from scratch. The “abort and restart” approach becomes a performance bottleneck for the use cases with high contention objects or long running transactions. In a...

C. Mohan and I. Narang. Recovery and coherency-control protocols for fast inter-system page transfer and ne-granularity locking in a shared disks transaction environment .

Mobile clients retrieve and update databases at servers. They use transactions in order to ensure the consistency of shared data in the presence of concurrent accesses. Transaction processing at mobile clients faces new challenges to accommodate the limitations of mobile environments, such as frequent disconnections and low bandwidth. Caching of frequently accessed data in a mobile computer can...

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...

This paper investigates the issues of malicious transactions by insiders in database systems. It establishes a number of rule sets to constrain the relationship between data items and transactions. A type of graph, called Predictive Dependency Graph, has been developed to determine data flow patterns among data items. This helps in foretelling which operation of a transaction has the ability to...