Given a query location Q in multi-dimensional space, the classical KNN problem is to return the K spatially closest answers in the database with respect to Q. The KNDN (K-Nearest Diverse Neighbor) problem is a semantic extension where the objective is to return the spatially closest result set such that each answer is sufficiently different, or diverse, from the rest of the answers. We review h...

The purpose of this paper is to review ethnic diversity, national unity and multicultural education in China with graduate students in a multicultural education course and pose some questions for discussion. China is a rapidly developing multiethnic country facing several challenges, including pollution, growing income inequality and low political participation of ordinary citizens. These can t...