Wolfgang Rülling

Learn More
In this paper we introduce a general framework for com-paction on a torus. This problem comes up whenever an array of identical cells has to be compacted. We instantiate our framework with several specific compaction algorithms: one-dimensional compaction without and with automatic jog insertion and two-dimensional com-paction.
(in press). Large-scale student assessment studies measure the results of processes of knowledge acquisition: Evidence in support of the distinction between intelligence and student achievement. (in press). The relationship between homework time and achievement is not universal: Evidence from multilevel analyses in 40 countries. School Evaluation and School(More)