When merging belief functions, Dempster rule of combination is justified only when sources can be considered as independent. When dependencies are ill-known, it is usual to ask the merging operation to satisfy the property of idempotence, as this property ensures a cautious behaviour in the face of dependent sources. There are different strategies to find such rules for belief functions. One st...

The technical and allocative efficiency of broadacre farmers in a southern region of Western Australia is investigated over a three-year period. Applying data envelopment analysis (DEA) and stochastic frontier analysis (SFA) reveals there is some inefficiency in each year, which decreases over time. The distributions of technical efficiency in each year are positively skewed toward higher effic...

Online learning is often supported by technologies that provide task-oriented groups such as classes or professional development teams with their own workspaces for interaction. This paper begins an exploration into the proposition that participants may benefit if they are not isolated from each other, but rather are enabled to discover persons and resources from contexts other than the origina...

The problem of low-rank matrix factorization has seen significant attention in recent computer vision research. Problems that use factorization to find solutions include structure from motion, non-rigid object tracking and illumination based reconstructions. Matrix decomposition algorithms, such as singular value decomposition, can be used to obtain the factorizations when all the input data ar...