Recent studies indicated that companies are increasingly experiencing data quality (DQ) related problems resulting from their increased data collection efforts. Addressing these concerns requires a clear definition of DQ but typically, DQ is only broadly defined as ‘fitness for use’. While capturing its essence, a more precise interpretation of DQ is required during measurement. While there is ...

Many pedagogues have argued that learners should shape their own learning experience whilst tutors should facilitate this process of knowledge construction. Digital environments have been often used in an attempt to scaffold learning in these innovative learning settings. However the results obtained have been mixed both in terms of learning achievements and learners' satisfaction. We argue tha...

A genetic programming system is created. A first fitness function f1 is used to evolve a program that implements a first feature. Then the fitness function is switched to a second function f2, which is used to evolve a program that implements a second feature while still maintaining the first feature. The median number of generations G1 and G2 needed to evolve programs that work as defined by f...

This study investigates the decision making between fitness function with differing variance and computational-cost values. The objective of this decision making is to provide evaluation relaxation and thus enhance the efficiency of the genetic search. A decisionmaking strategy has been developed to maximize speed-up using facetwise models for the convergence time and population sizing. Results...

Agents in a large population are randomly matched to play a certain game, payoffs in which represent fitness. Agents may have preferences that are different from fitness. They learn strategies according to their preferences, and evolution changes the preference distribution in the population according to fitness. When agents know the preferences of the opponent in a match, only efficient symmet...

A system for automatic composition using grammatical evolution is presented. Music is created under the constraints of a generative grammar, and under the bias of an automatic fitness function and evolutionary selection. This combination of two methods is seen to be powerful and flexible. Human evaluation of automatically-evolved pieces shows that a more sophisticated grammar in combination wit...