Point Cloud Library: Three-Dimensional Object Recognition and 6DOF Pose Estimation

With the advent of new-generation depth sensors, the use of three-dimensional (3-D) data is becoming increasingly popular. As these sensors are commodity hardware and sold at low cost, a rapidly growing group of people can acquire 3- D data cheaply and in real time

An integrative perceptual approach for teaching Chinese characters

This paper is concerned with an innovative approach to teaching Chinese characters. Traditionally, pupils learn Chinese characters by repeatedly copying them until they can reproduce their form and pronunciation from memory. Most of the characters pupils are required to learn are selected on the basis of their frequency in adult written communications rather in everyday child usage. The process takes many years and is perceived by pupils as laborious and boring. The writers of the paper developed an approach based on the phenomenographic approach to learning and on various pioneering ways of teaching Chinese characters. Learning starts with the pupils' own language and characters are introduced and used in contexts meaningful to the pupil, attention being drawn systematically to structural features, written form and pronunciation. Characters are learnt in relational clusters, similarities and variations among related characters in the clusters being used by teachers to highlight and emphasise crucial aspects of Chinese characters and words. The learning mastered serves as a foundation for subsequent learning. After an in-depth discussion of theory and pedagogy, the writers report an investigation in four primary schools in Hong Kong that yields strong support for the efficacy of the approach. © 2006 Springer Science+Business Media, Inc.link_to_subscribed_fulltex