4 papers:
LCT-2015-TriantafyllouT #student- Out of Classroom Instruction in the Flipped Classroom: The Tough Task of Engaging the Students (ET, OT), pp. 714–723.
KDD-2004-GadeWK #constraints #mining #performance- Efficient closed pattern mining in the presence of tough block constraints (KG, JW, GK), pp. 138–147.
SAC-2003-JiaPP #constraints #mining- Tough Constraint-Based Frequent Closed Itemsets Mining (LJ, RP, DP), pp. 416–420.
KDD-2000-GardnerB #data mining #mining #problem- Data mining solves tough semiconductor manufacturing problems (MG, JB), pp. 376–383.