Purpose The existing traditional recommendations based on content-based filtering (CBF), collaborative filtering (CF) and hybrid approaches are inadequate for recommending practice challenges in programming online judge (POJ). These systems only consider the preferences of the target users or...

This article describes how patterns discovery of mobile web services is an emerging field today, in which utility also plays an important role. Utility may be referred to as profit, price, significance or preference of the mobile web services. With the help of web utility, one can discover...

High utility itemsets mining identifies itemsets whose utility satisfies a given threshold. It allows users to quantify the usefulness or preferences of items using different values. Thus, it reflects the impact of different items. High utility itemsets mining is useful in decision-making...