]> BibSonomy publications for /author/Voituriez http://www.bibsonomy.org/burst/author/Voituriez BibSonomy BuRST Feed for /author/Voituriez 2008-07-27T02:46:59+02:00 Endogenous risk and long run effects of liberalization in a global analysis framework http://www.bibsonomy.org/bibtex/2f75eeb6e74b2910973ff7583a5844f83/smicha smicha 2008-04-28T13:05:01+02:00 CGE
Endogenous risk and long run effects of liberalization in a global analysis framework
Jean-Marc Boussard and Fran\c{c}oise G{\'e}rard and Marie Gabrielle Piketty and Mourad Ayouz and Tancr{\`e}de Voituriez Economic Modelling 23 457--475 (2006)
to CGE by smicha on 2008-04-28 13:05:01 ]]> Economic ModellingMay3457--475Endogenous risk and long run effects of liberalization in a global analysis framework232006CGE 2008-04-28 13:05:01.0 A stochastic theory for the intermittent behaviour of foraging animals Physica Ahttp://www.bibsonomy.org/bibtex/2b547ec5cd7988f004c0448879dc3c5df/smicha smicha 2008-04-22T10:36:30+02:00 Foraging animals
A stochastic theory for the intermittent behaviour of foraging animals
O. B{\'e}nichou and M. Coppey and M. Moreau and P. H. Suet and R. Voituriez Physica A: Statistical Mechanics and its Applications 356 151--156 (2005)
to Foraging animals by smicha on 2008-04-22 10:36:30 ]]> Physica A: Statistical Mechanics and its ApplicationsOct1151--156A stochastic theory for the intermittent behaviour of foraging animals3562005Foraging animals 012008-04-22 10:36:30.0 Two-dimensional intermittent search processes: An alternative to L[e-acute]vy flight strategies http://www.bibsonomy.org/bibtex/202fa009f7b85707f4059aaf14b554def/andreab andreab 2007-11-29T15:49:01+01:00 ecology flight levy problems processes random search
Two-dimensional intermittent search processes: An alternative to L[e-acute]vy flight strategies
O. B\'{e}nichou and C. Loverdo and M. Moreau and R. Voituriez Physical Review E (Statistical, Nonlinear, and Soft Matter Physics) 74 020102 (2006)
to ecology flight levy problems processes random search by andreab on 2007-11-29 15:49:01 ]]> Physical Review E (Statistical, Nonlinear, and Soft Matter Physics)2020102Two-dimensional intermittent search processes: An alternative to L[e-acute]vy flight strategies742006ecology flight levy problems processes random search 2007-11-29 15:49:01.0 Lévy flights are known to be optimal search strategies in the particular case of revisitable targets. In the relevant situation of nonrevisitable targets, we propose an alternative model of two-dimensional 2D search processes, which explicitly relies on the widely observed intermittent behavior of foraging animals. We show analytically that intermittent strategies can minimize the search time, and therefore do constitute real optimal strategies. We study two representative modes of target detection and determine which features of the search time are robust and do not depend on the specific characteristics of detection mechanisms. In particular, both modes lead to a global minimum of the search time as a function of the typical times spent in each state, for the same optimal duration of the ballistic phase. This last quantity could be a universal feature of 2D inter- mittent search strategies. Two-dimensional intermittent search processes: An alternative to Levy flight strategies http://www.bibsonomy.org/bibtex/2e02993157386c96fded387c4a2a526f4/statphys23 statphys23 2007-06-20T10:16:09+02:00 first intermittent passage processes random search statphys23 strategies time topic-11 walks
Two-dimensional intermittent search processes: An alternative to Levy flight strategies
C. Loverdo and O. Benichou and R. Voituriez and M. Moreau Abstract Book of the XXIII IUPAP International Conference on Statistical Physics (2007)
to first intermittent passage processes random search statphys23 strategies time topic-11 walks by statphys23 on 2007-06-20 10:16:09 ]]> Genova, ItalyAbstract Book of the XXIII IUPAP International Conference on Statistical Physics9-13 JulyTwo-dimensional intermittent search processes: An alternative to Levy flight strategies2007first intermittent passage processes random search statphys23 strategies time topic-11 walks 2007-06-20 10:16:09.0Levy flights are known to be optimal search strategies in the particular case of revisitable targets. In the relevant situation of nonrevisitable targets, we propose an alternative model of two-dimensional 2D search processes, which explicitly relies on the widely observed intermittent behavior of foraging animals. We show analytically that intermittent strategies can minimize the search time, and therefore do constitute real optimal strategies. We study two representative modes of target detection and determine which features of the search time are robust and do not depend on the speci?c characteristics of detection mechanisms. In particular, both modes lead to a global minimum of the search time as a function of the typical times spent in each state, for the same optimal duration of the ballistic phase. This last quantity could be a universal feature of 2D intermittent search strategies. References : G.M. Viswanathan, S.V. Buldyrev, S.Havlin, M.G.E. Da Luz, E.P. Raposo et H.E. Stanley : Optimizing the success of random searches. Nature, 401(6756):911-914, (1999). O.Benichou, C.Loverdo, M.Moreau et R.Voituriez, A minimal model of intermittent search in dimension two, Journal of Physics : Condensed Matter 19, 065141 (2007) O.Benichou, C.Loverdo, M.Moreau et R.Voituriez, Two-dimensional intermittent search processes : An alternative to Levy flight strategies Physical Review E 74, 020102 (2006) This last article has been commented in a news and views in Nature : M.F. Shlesinger : Mathematical physics : Search research. Nature, 443:281, (2006) Optimal Search Strategies for Hidden Targets http://www.bibsonomy.org/bibtex/2779aa51e3517d98ac494795906a1b4fb/statphys23 statphys23 2007-06-20T10:16:09+02:00 first passage processes random search statistics statphys23 topic-11 walks
Optimal Search Strategies for Hidden Targets
O. Benichou and C. Loverdo and M. Moreau and R. Voituriez Abstract Book of the XXIII IUPAP International Conference on Statistical Physics (2007)
to first passage processes random search statistics statphys23 topic-11 walks by statphys23 on 2007-06-20 10:16:09 ]]> Genova, ItalyAbstract Book of the XXIII IUPAP International Conference on Statistical Physics9-13 JulyOptimal Search Strategies for Hidden Targets2007first passage processes random search statistics statphys23 topic-11 walks 2007-06-20 10:16:09.0Many physical, chemical or biological problems can be rephrased as search processes, involving a searcher and a target of unknown position. We show that intermittent search strategies, alternating active search phases and non reactive displacement phases, are universal for a wide class of problems involving search time optimization. More precisely, we address the general question of determining in which cases a searcher should, or should not, interrupt his search activity by losing time in non reactive phases of mere displacement, and which durations of each phase optimize the search time. Using a representative analytical model, we show that intermittent strategies do optimize the search time as soon as the target is difficult to detect, and we explicitly give the optimal search strategies, which depend on the memory skills of the searcher. References:\\ 1. M. Coppey, O. Benichou, R. Voituriez, and M. Moreau, Biophys. J. 87, 1640 (2004) 2. O. Benichou, M. Coppey, M. Moreau, PH Suet, R. Voituriez, Phys. Rev. Lett. {\bf 94}, 198101 (2005) 3. O Benichou, C. Loverdo, M. Moreau, R. Voituriez, Phys. Rev. E {\bf 74}, 020102 (2006)