The Sudoku puzzle has achieved worldwide popularity recently, and attracted great attention of the computational intelligence community. Sudoku is always considered as Satisfiability Problem or Constraint Satisfaction Problem. In this paper, we propose to focus on the essential graph structure underlying the Sudoku puzzle. First, we formalize Sudoku as a graph. Then a solving algorithm based on...

Web portals provide an efficient gateway to a broad range of Eservices, resources and information. Web portals need to evolve towards being adaptive in nature, so that the ensuing E-services provided by them are dynamically tailored to meet the diverse needs of its users. This paper explores the use of intelligent techniques, in particular constraint satisfaction methods, to develop adaptive E-...

Adding datatypes to ontology-mediated queries (OMQs) often makes query answering hard. As a consequence, the use of datatypes in OWL 2 QL has been severely restricted. In this paper we propose a new, non-uniform, way of analyzing the data-complexity of OMQ answering with datatypes. Instead of restricting the ontology language we aim at a classification of the patterns of datatype atoms in OMQs ...

A solution of a Constraint Satisfaction Problem (CSP) is an assignment of values to all its variables such that all its constraints are satis ed. Usually two CSPs are considered equivalent if they have the same solution set. We nd this de nition limiting, and develop a more general de nition based on the concept of mutual reducibility. In this extended scheme it is reasonable to consider a pair...

AbstrAct Product customization is an important facility that e-commerce offers to its users. On the Web, choice-board systems have become quite prevalent as the means by which users are able to customize their products. These systems allow customers to configure products and services by choosing from a menu of attributes, components, delivery options, and prices. In the context of a choiceboard...

To encourage the sustainability of rural tourism and to achieve success in the tourist industry, an understanding of the factors by which tourists are motivated to visit rural areas is required. This study aims to measure factors affecting rural tourists’ satisfaction in relation to different aspects of a destination and to increase the likelihood of revisitation and recommendation. This study ...

This study investigated the effect of visualization on user performance of information systems by comparing an information visualization system with a textual based system. The results indicate that the difference is significant in terms of task completion time, user satisfaction, and total number of mouse clicks.

Little is known about the effects of the level of fulfillment of the IT professional’s psychological contract on their innovative work and organizational citizenship behaviors. Using psychological contract and social information processing theories, this article proposes to answer the research question: How does the level of fulfillment of the IT professionals’ psychological contract affect the...