Intuitionistic fuzzy data warehouse and some analytical operations

This paper presents a data warehouse implemented on the basis of a database management system that supports operations over intuitionistic fuzzy data. The source system for the Intuitionistic Fuzzy Data Warehouse (IFDW) is a learning management system that provides university courses and is used for blended learning. To analyze the intuitionistic fuzzy (IF) concepts we apply new method for comparison of IF data and implement new operators in the IF relational data model. Sample application of the method is provided through some queries towards a star schema of the IFDW. It stores the data from student's performance on quiz questions and the related uncertainty in their own knowledge.