This paper discusses how cognitive maps might be analyzed for the purpose of structuring problems or issues. The paper suggests what the various analysis methods imply for an operational research practitioner when helping a client work on a ‘‘messy’’ issue or problem. 2003 Published by Elsevier B.V.

In our opinion, history and compatibility considerations have rendered existing HOL implementations rather messy and badly organized. We describe how, building on joint work with Konrad Slind, we have produced a re-engineered HOL. Various experiments have been tried on this ‘toy’ version, and we will report the results.

Abstract. Pure Lagrangian, i.e., trajectory-based transport models, take into account only the resolved advective part of transport. That means neither mixing processes between air parcels (APs) nor unresolved subgrid-scale like convection are included. The Chemical Lagrangian Model Stratosphere (CLaMS 1.0) extends this approach by including APs parameterizing small-scale isentropic mixing. To ...