This paper investigates the potential of integrated mobile financial information and transaction services which can help private investors in making time-critical investment decisions and portfolio transactions in time. The analysis of intraday stock price reactions following company announcements provides evidence regarding the added value of such services if abnormal price movements can be ob...

Transaction throughput is a crucial issue for database systems. Multi-level transactions have been proposed in an attempt to offer improved concurrency of transaction processing by allowing operations that would otherwise be performed serially to take place concurrently. Therefore, it is vital that recovery algorithms do not impede this concurrency by artificially introducing restrictions that ...

The broadcast-based data dissemination in wireless environments poses new challenging issues on data consistency of transaction processing. In this paper, we first adapt the optimistic concurrency control with forward validation to the broadcast environments. The adapted protocol gives autonomy between the mobile clients and the server such that the mobile clients can read consistent data off t...

In a distributed system some or all of the data items are replicated and stored at separate sites. This increases the availability of these items and it is then possible to complete transactions faster than in a single site system. However, the concurrent processing of transactions at separate sites can generate inconsistencies in the stored information. Several replica control techniques have ...

Many enterprise systems employ both object-oriented middleware (OOM) and message-oriented middleware (MOM). However, support for the integration of object and messaging services, in particular for transaction processing across object and messaging components, is very limited. In this paper, we introduce the concept of Dependency-Spheres (D-Spheres), a global transaction context for distributed ...

Integration processes are increasingly used in order to integrate distributed and heterogeneous systems. Although transactional behavior of workflows has been discussed extensively, recovery processing has been disregarded so far. Due to the huge number of different integration systems and models, there are also different transaction concepts with overlapping functionalities available. However,...

Transaction Repair is a method for lock-free, scalable transaction processing that achieves full serializability. It demonstrates parallel speedup even in inimical scenarios where all pairs of transactions have significant read-write conflicts. In the transaction repair approach, each transaction runs in complete isolation in a branch of the database; when conflicts occur, we detect and repair ...

This paper describes the communication functions required for distributed transaction processing. The paper begins with a discussion of models that illustrate how a communication subsystem fits into a proposed system architecture. Then, it describes the system and user activities that depend on the communication subsystem. Finally, it uses these activities to motivate the facilities that should...

We describe an E-Learning tool, DTST, that is designed to assist undergraduate computer science students to learn about database transaction processing, in general, and CRAS property satisfaction, in particular. DTST is written primarily in PROLOG, and includes an Internet interface for ease of use and access. Testing of DTST suggests that the learning tool is of value in helping computer scien...