In this first part of a two-part article, the principal characteristics of the TIMES model and of its global incarnation as ETSAP-TIAM are presented and discussed. TIMES was conceived as a descendent of the MARKAL and EFOM paradigms, to which several new features were added to extend its functionalities and its applicability to the exploration of energy systems and the analysis of energy and en...

A point H is hidden in a rooted tree Q which is endowed with asymmetric distances (travel times) between nodes. We determine the randomized search strategy, starting from the root, which minimizes the expected time to reach H; in the worst case. This is equivalent to a zero-sum search game (Q), with minimizing Searcher, maximizing Hider and payo¤ equal to the capture time. The worst Hiding dist...

When modelling travel times and traffic flows varying over time on traffic networks it is desirable that the travel times should satisfy certain properties. This paper investigates these properties and their interrelationships, in particular, uniqueness and continuity, first-in-first-out (FIFO), causality and time-flow consistency, while assuming a single traffic type. For generality we investi...

BACKGROUND Planning for a possible influenza pandemic is an extremely high priority, as social and economic effects of an unmitigated pandemic would be devastating. Mathematical models can be used to explore different scenarios and provide insight into potential costs, benefits, and effectiveness of prevention and control strategies under consideration. METHODS AND FINDINGS A stochastic, equa...