This article compares two fuzzy approaches to land suitability evaluations, Analytical Hierarchy Process (AHP) and Ideal Point. The methods were evaluated using a case study which models the opportunities for wheat production under irrigation conditions in the north-western region of Jeffara Plain, Libya. A number of relevant soil and landscape criteria were identified through a review of the l...

Data warehousing and OLAP applications must nowadays handle complex data that are not only numerical or symbolic. The XML language is well-suited to logically and physically represent complex data. However, its usage induces new theoretical and practical challenges at the modeling, storage and analysis levels; and a new trend toward XML warehousing has been emerging for a couple of years. Unfor...

On-Line Analytical Processing (OLAP) is a trend in database technology, based on the multidimensional view of data. In this paper we introduce the Cube Presentation Model (CPM), a presentational model for OLAP data which, to the best of our knowledge, is the only formal presentational model for OLAP found in the literature until today. First, our proposal extends a previous logical model for cu...

In the process ofpersonalfinancial planning individuals are confronted with a time dependent wealth allocation problem. Oftentimes the solution involves selectingjnancial products based on objective criteria, for example, product cost and expected return. While objective criteria are important to the selection process, an individual’s subjective valuation of all criteria, objective and subjecti...