Tommy Norberg

Learn More
It is recognized that the usual output of a fault tree analysis in some studies is not sufficiently informative. For added value in a widely used instrument for doing risk analyses, a Markovian approach is suggested. It is shown how to extend the calculations of the standard fault tree gates, so that information is available not only on the failure(More)
In most cases authors are permitted to post their version of the article (e.g. in Word or Tex form) to their personal website or institutional repository. Authors requiring further information regarding Elsevier's archiving and manuscript policies are encouraged to visit: Keywords: Dynamic fault tree (DFT) Drinking water Risk assessment Markov model Monte(More)
The paper provides a Bayesian method for estimating totals such as the polluted area or cost of remediation of a possibly contaminated hazardous waste site. After specifying a prior distribution on the total polluted area (here expert opinion may be taken into account), its focus is on how to chose the number of measurements to make in order to achieve a(More)
The paper provides a Bayesian method for estimating totals such as the polluted area or cost of remediation of a possibly contaminated hazardous waste site. After specifying a prior distribution on the total polluted area (here expert opinion may be taken into account), its focus is on how to chose the number of measurements to make in order to achieve a(More)
The sojourn time that a Markov chain spends in a subset E of its state space has a distribution that depends on the hitting distribution on E and the probabilities (resp. rates in the continuous time case) that govern the transitions within E. In this note we characterise the set of all hitting distributions for which the sojourn time is geometric (resp.(More)
Remediation of contaminated soil is associated with substantial uncertainties and economic risks. Unfortunately, the extent of soil sampling is often determined without openly addressing these uncertainties and risks, leading to non-optimal use of available economic resources. Data worth analysis can be used to design soil sampling programs in order to(More)
  • 1