Martin Powell suggests that the death of the English National Health Service (NHS) has been announced so many times we are at risk of not noticing should it actually happen. He is right. If we ‘cry wolf’ too many times, we risk losing sight of what is important about the NHS and why.

We study e cient implementations of the push-relabel method for the maximum ow problem. The resulting codes are faster than the previous codes, and much faster on some problem families. The speedup is due to the combination of heuristics used in our implementation. We also exhibit a family of problems for which all known methods seem to have almost quadratic time growth rate. Andrew V. Goldberg...

Doppler peaks extraction from massive raw data is a tricky part of coherent wind Lidar (CDWL) optimization. In this paper, hybrid genetic/Powell algorithm (HGAP) proposed to process the power spectrum measured signal CDWL. The HGAP has excellent global exploration capability, which likes traditional genetic algorithms and fast convergence, like Powell method. Hence, advantages find center frequ...

We derive a geometric criterion for the convexity of Powell-Sabin interpolants and present a multivariate generalization.