Barchan dunes emerge as a collective phenomena involving the generation of thousands of them in so called barchan dune fields. By measuring the size and position of dunes in Moroccan barchan dune fields, we find that these dunes tend to distribute uniformly in space and follow an unique size distribution function. We introduce an analytical mean-field approach to show that this empirical size d...

We describe methodology for multidimensional scaling based on interactive data visualization. This methodology was enabled by software in which MDS is integrated in a multivariate data visualization system. The software, called “XGvis”, is described in a companion paper (Buja, Swayne, Littman, Dean and Hofmann 2001), that lays out the implemented functionality in some detail; in the current pap...

Weighted metric scaling (Cuadras and Fortiana 1995b) is a natural extension of classic metric scaling which encompasses several well-known techniques of Euclidean representation of data, including correspondence analysis of bivariate contingency tables. A continuous version of this technique, following the trend initiated in (Cuadras and For-tiana 1993, 1995a) is applied to the study of several...

The project CARLOS (Cancer Registry Lower-Saxony) developed the Epidemiological and Statistical Data Exploration System (CARESS) to support multidimensional analysis of health data. The system is based on an architecture that focuses on extensive interoperability between a database management system and several analysis and visualisation tools. As spatial and statistical aspects of the data pla...

In decisional systems framework, my thesis focuses on the conception and the querying of multidimensional data.We provide a dimensional model organising data in a constellation of facts (subject of analysis) associated withdimensions (axes of analysis). These dimensions are flexible because each dimension instance can belong to oneor several hierarchies (perspectives of analysis...

The markets globalization is one of the factors creating conditions for the development of entrepreneurship. Entrepreneurship does not have one generally accepted definition. Most often, entrepreneurship is perceived as the ability to increase the number of enterprises. Entrepreneurship can be understood as the potential to identify and use development opportunities regardless of own resources....

Property investment in the real estate industry has a high risk due to the uncertainty factors that will affect the decisions made and high cost. Analytic hierarchy process has existed for some time in which referred to an expert’s opinion to measure the uncertainty of the risk factors for the risk analysis. Therefore, different level of experts’ experiences will create different opinion and le...