Two novel applications of the plane sweep paradigm are demonstrated, namely, for the computation of extended viewsheds on gridded DEMs and for class interval selection on TIN-based DEMs. In both cases, the e ciency of the plane sweep algorithm is signi cantly better than a straightforward approach. The algorithms are presented by rst giving the plane sweep method as a general approach that requ...

Screen-space ambient occlusion and obscurance have become established methods for rendering global illumination effects in real-time applications. While they have seen a steady line of refinements, their computational complexity has remained largely unchanged and either undersampling artefacts or too high render times limit their scalability. In this paper we show how the fundamentally quadrati...

In October 2021, twenty-one OECD countries and partner economies participated in an online product safety sweep to identify the degree which products were available for sale despite (i) being banned or recalled, (ii) having inadequate labelling (iii) not meeting voluntary mandatory standards. Results reveal that large volumes of unsafe are readily traded across borders a 79% average rate non-co...

Hydrogen production from water thermolysis can be enhanced by the use of perovskite-type mixed ionic and electronic conducting (MIEC) membranes, through which oxygen permeation is driven by a chemical potential gradient. In this work, water thermolysis experiments were performed using 0.9 mm thick La0.9Ca0.1FeO3-δ (LCF-91) perovskite membranes at 990 °C in a lab-scale button-cell reactor. We ex...

Current hexahedral mesh generation techniques rely on a set of meshing tools, which when combined with geometry decomposition leads to an adequate mesh generation process. Of these tools, sweeping tends to be the workhorse algorithm, accounting for at least 50 per cent of most meshing applications. Constraints which must be met for a volume to be sweepable are derived, and it is proven that the...