Catálogo de publicaciones - libros

Web Service choreography management challenges the research on Service Oriented Architectures: different from Web Service composition, where a central orchestrator process invokes the Web Service suppliers, a choreographed service is decentralized and it is based on the coordination of a set of Web Service suppliers having a partial view of the overall service. In this paper, we present a framework which supports the monitoring of the progress of a choreographed service, the early detection of faults and the notification of the Web Services affected by the faults.

To achieve vital advantages of simulating business scenarios, extensions are made to versioning concept by dividing alternative versions into two types, Materialized Alternative Versions and Virtual Alternative Versions. This paper presents querying method from multi-version data warehouse in the presence of real versions, materialized and virtual alternative versions. This is done by making extensions to our Synthetic Warehouse Builder with new component called Version Manager.Version manger with its confinement process divide query into smaller parts called mono-version queries; execute it on relevant and heterogeneous version/s and merging the result to present it for analysis. It is expected that, Version Manager is very useful for short term data requirements as well as rapidly changing requirements of simulating business alternatives.

Traditional databases are unable to support analytical business requirements. As a result, the conception of data warehouse was floated. So, data warehouse with its subjective schemas facilitates analytical business requirements. But, Conventional data warehouse cannot handle changes to its operational sources, for such purpose two approaches had been proposed: i) evolution ii) versioning.In this study, we have presented a blend of evolution and versioning approaches with the help of schema-versioning-functions, named: i) versioning function ii) reviving function iii) qualifying function. The paper formalizes algebra for version evolution operations (VEO) by modifying existing calculi. This algebra will provide strong foundations for data warehousing tools which evolutes and maintains multiple versions.

In this paper, we propose an efficient scheduling algorithm for problems in which tasks with precedence constraints and communication delays have to be scheduled on an heterogeneous distributed system with one fault hypothesis.Our algorithm combines the DSS_OPT algorithm and the eFRCD algorithm. To provide a fault-tolerant capability, we employ primary and backup copies. In this scheme, backup copies can overlap other backup copies, and backup copies are not established for tasks that have more than one primary copy. The result is a schedule in polynomial time that is optimal when there is no failure, and is a good resilient schedule in the case of one failure.

Development processes are often newly defined for every project. However, a reuse of the process knowledge between different projects rarely takes place. In this paper, we present a concept which permits a general reuse of process knowledge on the basis of the process family approach and as well the project individual customization of processes according to a mass customization.

Business Process Reengineering (BPR) has been popularized in recent years as the most important technique for restructuring business operations to achieve dramatic improvements in profitability and sustainable competitive advantage [3]. The Re-engineering activity is a transformational change, moving the business outside its current «rules and games» [5]. Change management is then necessary to manage people trough the emotional ups and downs lead to the massive change and then prevent resistance. Several process evaluation approaches exist to analyze the impact of business processes structural complexity on their performance. To achieve this objective structural and operational metrics are defined upon processes. These metrics are mostly adaptations of software Process or product Metrics. However, these approaches do not target performance problems lead to organizational and business change, that inevitably occur in projects like BPR. This paper defines change metrics that measure the change operated on business process models. Our metrics are also inspired by change metrics defined in Software engineering [6]- [7]-[8]. This work is a first step towards a quantitative and predictive change management methodology to prevent risk related to organizational change in Reengineering projects.

Unicode Searching Algorithm using multilevel binary tree is proposed to search the Unicode in efficient way. The algorithm is applied on Bangla Unicode searching to convert Bijoy string into Unicode string. Firs, the algorithm build a multilevel binary tree based on ACII code with its corresponding Unicode. The tree is build from a multilevel binary sorted data containing ASCII code and its corresponding Unicode. The data must be sorted based on ASCII code. The algorithm takes Bangla Bijoy string as input value and output the same string in Unicode format. The input Bijoy string must be in Unicode readable format

Pocket PCs are mobile computing devices largely used for mobile communications. Often Pocket PCs are long time used and modifications of the connection parameters to different networks are necessary. There is also need for installing different software packages. The mentioned operations can be manually done, by each user, this being a difficult and error prone solution or automatically, from a centralized location. This paper presents a centralized management system for mobile communications with Pocket PCs. It is useful for remotely setting connection parameters (dial-up phone numbers, SMSC numbers, DNS servers addresses etc.) and loading software packets to all or part of the Pocket PCs from a group leading to important saved times and the possibility to offer customized programs and graphical elements.

This paper describes the development of a navigation aid in order to assist blind and visually impaired people to navigate easily, safely and to detect any obstacles. The system is based on a microcontroller with synthetic speech output. In addition, it consists of two vibrators, two ultrasonic sensors mounted on the user’s shoulders and another one integrated into the cane. This aid is able to give information to the blind about urban walking routes and to provide real-time information on the distance of over-hanging obstacles within six meters along the travel path ahead of the user. The suggested system consists then in sensing the surrounding environment via sonar sensors and sending vibro-tactile feedback to the user of the position of the closest obstacles in range. For the ultrasonic cane, it is used to detect any obstacle on the ground.

A wearable health care monitoring system is proposed. Constant health monitoring can improve the patient’s quality of life for various health conditions such as diabetes and obesity, the focus being on prevention rather than treatment. To achieve this individuals and patients need to be empowered and educated with the use of proactive mobile computing tools and technologies such as mobile phones, PDAs, Bluetooth and WAP. Integrating these tools provides a transparent way of monitoring, analysing and modelling their metabolic performance and allows patients to become more responsible for the management of their health conditions.