Distinctive Approaches to Computer Graphics Education

This paper presents the latest advances and research in Computer Graphics education in a nutshell. It is concerned with topics that were presented at the Education Track of the Eurographics Conference held in Lisbon in 2016. We describe works corresponding to approaches to Computer Graphics education that are unconventional in some way and attempt to tackle unsolved problems and challenges regarding the role of arts in computer graphics education, the role of research‐oriented activities in undergraduate education and the interaction among different areas of Computer Graphics, as well as their application to courses or extra‐curricular activities. We present related works addressing these topics and report experiences, successes and issues in implementing the approaches.     

Cesium dynamics in long pulse operation of negative hydrogen ion sources for fusion

Large scale negative hydrogen ion sources operating stable for 1 h (cw mode) are required for the neutral beam heating system of the fusion experiment ITER. The formation of negative hydrogen ions relies on the surface effect for which cesium is evaporated into the source. In order to monitor the cesium dynamics the laser absorption spectroscopy technique is applied to the long pulse test facility MANITU. In the vacuum phase, without plasma operation the evaporation of cesium and the built-up of the cesium in the source are measured. Typical neutral cesium densities are 10(15) m(-3). During plasma operation and after the plasma phase a high cesium dynamics is observed, showing also depletion of cesium during long pulses with low cesium amount. The co-extracted electron current decreases with the cesium amount to a certain level whereas the ion current indicates an optimum density range.     

Homomorphisms of modules associated with polynomial matrices with infinite elementary divisors

If the inverse of a nonsingular polynomial matrix L has a polynomial part then one can associate with L a module over the ring of proper rational functions, which is related to the structure of L at infinity. In this paper we characterize homomorphisms of such modules.     

Observation of salt impurities in ultra-high-molecular-weight polyethylene (UHMWPE)

Different direct molded ultra-high-molecular-weight polyethylene (UHMWPE) samples have been investigated using reflective light microscopy and scanning electron microscope techniques (low voltage and variable pressure SEM). On the surfaces as well as throughout the material a—to the best of our knowledge—unknown type of impurities has been identified. X-ray element analysis (EDX) was used to characterise these impurities as sodium chloride and potassium chloride salt inclusions.     

Minimal state space realizations in Jacobson normal form

We derive a procedure for a minimal state space realization of a rational transfer matrix over an arbitrary field. The procedure is based on the Smith-McMillan form and leads to a state transition matrix in Jacobson normal form.