@book{PAR00007498, title = {{F}rench roadmap for complex systems 2008-2009}, author = {{C}havalarias, {D}. and {B}ourgine, {P}. and {P}errier, {E}dith and {A}mblard, {F}. and {A}rlabosse, {F}. and {A}uger, {P}ierre and {B}aillon, {J}.{B}. and {B}arreteau, {O}. and {B}audot, {P}. and {B}ouchaud, {E}. and {B}en {A}mor, {S}. and {B}erry, {H}. and {B}ertelle, {C}. and {B}erthod, {M}. and {B}eslon, {G}. and {B}iroli, {G}. and {B}onamy, {D}. and {B}ourcier, {D}. and {B}rodu, {N}. and {B}ui, {M}. and {B}urnod, {Y}. and {C}hapron, {B}. and {C}hristophe, {C}. and {C}l{\'e}ment, {B}. and {C}oatrieux, {J}.{L}. and {C}ointet, {J}.{P}. and {D}agrain, {V}. and {D}auchot, {K}. and {D}auchot, {O}. and {D}aviaud, {F}. and {D}e {M}onte, {S}. and {D}effuant, {G}. and {D}egond, {P}. and {D}elahaye, {J}.{P}. and {D}oursat, {R}. and {D}'{O}vidio, {F}. and {D}ubois, {M}. and {D}ubruelle, {B}. and {D}utreix, {M}. and {F}aivre, {R}. and {F}arge, {E}. and {F}landrin, {P}. and {F}ranceschelli, {S}. and {G}aucherel, {C}. and {G}audin, {J}.{P}. and {G}hil, {M}. and {G}iavitto, {J}.{L}. and {G}inelli, {F}. and {G}inot, {V}. and {H}oullier, {F}. and {H}ubert, {B}. and {J}ensen, {P}. and {J}ullien, {L}. and {K}apoula, {Z}. and {K}rob, {D}. and {L}adieu, {F}. and {L}ang, {G}. and {L}avelle, {C}. and {L}e {B}ivic, {A}. and {L}eca, {J}.{P}. and {L}ecerf, {C}. and {L}egrain, {P}. and {L}'h{\^o}te, {D}. and {L}oireau, {M}aud and {M}angin, {J}.{F}. and {M}onga, {O}livier and {M}orvan, {M}. and {M}uller, {J}ean-{P}ierre and {N}egrutiu, {I}. and {P}eyreiras, {N}. and {P}umain, {D}. and {R}adulescu, {O}. and {S}allantin, {J}. and {S}anchis, {E}. and {S}chertzer, {D}. and {S}choenauer, {M}. and {S}ebag, {M}. and {S}imonet, {E}. and {S}ix, {A}. and {T}arissan, {F}. and {V}incent, {P}.}, editor = {}, language = {{ENG}}, abstract = {{A} ?complex system? is in general any system comprised of a great number of heterogeneous entities, among which local interactions create multiple levels of collective structure and organization. {E}xamples include natural systems ranging from bio-molecules and living cells to human social systems and the ecosphere, as well as sophisticated artificial systems such as the {I}nternet, power grid or any large-scale distributed software system. {A} unique feature of complex systems, generally overlooked by traditional science, is the emergence of non-trivial superstructures which often dominate the system's behaviour and cannot be easily traced back to the properties of the constituent entities. {N}ot only do higher emergent features of complex systems arise from lower-level interactions, but the global patterns that they create affect in turn these lower levels ? a feedback loop sometimes called immergence. {I}n many cases, complex systems possess striking properties of robustness against various large-scale and potentially disruptive perturbations. {T}hey have an inherent capacity to adapt and maintain their stability. {B}ecause complex systems require analysis at many different spatial and temporal scales, scientists face radically new challenges when trying to observe complex systems, in learning how to describe them effectively, and in developing original theories of their behaviour and control. {T}he aim of this roadmap is to identify a set of wide thematic domains for complex systems research over the next five years. {E}ach domain is organized around a specific question or topic and proposes a relevant set of ?grand challenges?, i.e., clearly identifiable problems whose solution would stimulate significant progress in both theoretical methods and experimental strategies.}, keywords = {complex systems ; complexity ; {F}ormal epistemology ; experimentation ; machine learning ; {S}tochastic and multiscale dynamics ; instabilities and robustness ; {C}ollective behavior in homogeneous and heterogeneous systems ; optimal control ; multiscale governance ; {R}econstruction of multiscale dynamics ; emergence and immergence processes ; {D}esigning artificial complex systems ; {C}omplex matter ; {P}hysiological functions ; {E}cosystemic complexity ; individual cognition ; social cognition ; {T}erritorial intelligence and sustainable development ; {U}biquitous computing ; {G}eosciences and the environment ; {FRANCE}}, address = {{P}aris}, publisher = {{RNSC}}, series = {}, pages = {82}, year = {2009}, URL = {https://www.documentation.ird.fr/hor/{PAR}00007498}, }