Drought is considered to be among the major natural hazards faced by human society, with significant impacts on environment, agriculture and economy stemming from its consequences [...]

In this algorithmic project we consider how to leverage increasingly capable mobile sensor networks to simultaneously exploit a changing environment and maintain low uncertainty about the previously explored regions. This problem, known as ‘coverage-estimation’ or ‘active sensing’ in the literature, has applications in many fields: tracking interesting oceanographic or atmospheric data using a ...

It is likely that the assessment of chemicals for mutagenicity will soon become a widespread practice, and a large number of different screening procedures have been proposed. The subjection of every new chemical to be released into the environment to every available test is clearly an impossible task, and it is necessary for an understanding of priorities in terms of risk and benefit to be bui...

We derive bounds for the mixture failure rate in the multiplicative (proportional hazards) model. We explicitly show that the corresponding proportionality in subpopulations does not result in proportionality for a whole population. We analyze the shape of the mixture failure rate in an environment with a stress change point and also discuss the effect of shocks which change a mixing distribution.