Transactional memory (TM) is a novel approach for handling concurrency issues. By experimenting on a prototype system implementing transactional memory in hardware, we aim at investigating if TM is of benefit for scientific and high-performance computing. The main goal of our work is to exploit the optimistic nature of transactional memory and increase performance by reducing the overhead from ...

Common goal of descriptive data mining techniques is presenting new information in concise, easily interpretable and understandable ways. Hierarchical clustering technique for example enables simple visualization of distances between analyzed objects or attributes. However, common distance measures used by existing data mining tools are usually not well suited for analyzing transactional data u...

INTRODUCTION Young adolescent women in sub-Saharan Africa are three to four times more likely to be HIV-positive than boys or men. One of the relationship dynamics that is likely to be associated with young women's increased vulnerability to HIV is transactional sex. There are a range of HIV-related risk behaviours that may drive this vulnerability. However, to date, limited epidemiological dat...

A Web process (WP) is a process that coordinates a set of Web services, as a cohesive unit of work in order to achieve common goals. In spite of the growing interest to Web services, current technologies are found lacking efficient transactional support for such applications. In this paper, we propose a transactional framework that enhances service description for a better characterization, a m...

As workflow management systems become more complex and critical to an organisation’s performance, there is an opportunity for a new generation of workflow management products. These products could greatly increase the scope of workflow management systems in target application areas. One of the key extensions to workflow management systems will be the use of transactional semantics to increase r...

Most STM systems are poorly equipped to support libraries of concurrent data structures. One reason is that they typically detect conflicts by tracking transactions’ read sets and write sets, an approach that often leads to false conflicts. A second is that existing data structures and libraries often need to be rewritten from scratch to support transactional conflict detection and rollback. Th...

(ABSTRACT) Transactional memory (TM) has emerged as a promising synchronization abstraction for multi-core architectures. Unlike traditional lock based approaches, TM shifts the burden of synchronization from the programmer to an underlying framework using hardware (HTM) and/or software (STM) components. Although STM provides a generic solution for developing more complex concurrent application...

Data state in a data management system such as a database is the result of the transactions performed on that data management system. Approaches such as single-message transactions and field calls [Gray1993] come closer than before/after values to expressing the intent of a transaction, the semantic transformation that should be performed on the data state even if that state is different than w...

This paper presents an approach that uses policies to manage contextdriven transactional Web services. Context feeds policies with details on Web services like current status, which permits aligning the behavior of these Web services to the transactional properties they need to satisfy. Context refers here to any information on the interactions a Web service initiates with peers and external en...

With the encapsulation of functionality in services, many applications are nowadays built on composite Web-Services. Those are specified using workflow execution languages, such as BPEL, which represent the structure of the composition. However, they do not integrate transactional guarantees such as failure-atomicity. It is up to the application designer to define appropriate failure handling m...