The computation of gas bubble-free surface interaction entails a time-stepping algorithm whereby a linear system is solved at each time-iteration. In our investigation, the linear systems are derived from a desingularized boundary integral formulation and are poorly conditioned. This leads to poor convergence rates when Krylov subspace methods are used to solve these systems. The convergence ra...

history of underwater diving dates back to antiquity. breath-hold technique in diving was known to the ancient nations. however, deep diving progressed only in the early decades of the 19 th century as the result of advancements in efficient underwater technologies which subsequently led to invention of sophisticated sets of scuba diving in the 20 th century. currently, diving is performed for ...

Looking back over the last three decades of Roman archaeology I find it difficult not to be impressed by the huge advances the discipline had made. The quantity of information collected has increased enormously. Romanists have enthusiastically embraced new archaeological technologies, and entire new subject areas landscape archaeology, palaeopathology, and underwater archaeology for instance ha...