Missing item responses are frequently found in educational large-scale assessment studies. In this article, the Mislevy-Wu response model is applied for handling nonignorable missing responses. This allows that missingness of an depends on itself and a further latent variable. However, with low to moderate amounts responses, parameters mechanism difficult estimate. Hence, regularized estimation...

We present a new locality sensitive hashing (LSH) algorithm for c-approximate nearest neighbor search in lp with 1 < p < 2. For a database of n points in lp, we achieve O(dn ) query time and O(dn + n) space, where ρ ≤ O((ln c)/c). This improves upon the previous best upper bound ρ ≤ 1/c by Datar et al. (SOCG 2004), and is close to the lower bound ρ ≥ 1/c by O’Donnell, Wu and Zhou (ITCS 2011). T...

BACKGROUND In healthy individuals slow temporal summation of pain or wind-up (WU) can be evoked by repetitive heat-pulses at frequencies of ≥.33 Hz. Previous WU studies have used various stimulus frequencies and intensities to characterize central sensitization of human subjects including fibromyalgia (FM) patients. However, many trials demonstrated considerable WU-variability including zero WU...

We present a new locality sensitive hashing (LSH) algorithm for c-approximate nearest neighbor search in `p with 1 < p < 2. For a database of n points in `p, we achieve O(dn) query time and O(dn + n1+ρ) space, where ρ ≤ O((ln c)2/cp). This improves upon the previous best upper bound ρ ≤ 1/c by Datar et al. (SOCG 2004), and is close to the lower bound ρ ≥ 1/c by O’Donnell, Wu and Zhou (ITCS 2011...

Zombies have become ubiquitous in recent years in all media, including digital games. Zombies have no soul or consciousness, and as completely alien, post-human Other, they seem like the perfect game opponent. Yet their portrayal is always politically charged, as they have historically been used as an allegory for slavery, poverty, and consumerism, and may be read as stand-ins for threatening b...