1 00:00:06,820 --> 00:00:12,460 The work of LISC founded by Guillaume Deffuant and currently led by Franck Jabot 2 00:00:12,460 --> 00:00:16,960 focuses on the modeling of complex social and environmental systems 3 00:00:16,960 --> 00:00:20,020 as well as strategies for action on these systems. 4 00:00:20,020 --> 00:00:24,949 To understand the dynamics of forests, interactions between plant population or 5 00:00:24,949 --> 00:00:29,820 animals in their environment or socials dynamics in rural areas; LISC researchers 6 00:00:29,820 --> 00:00:33,800 use mathematical and computational models. 7 00:00:33,800 --> 00:00:37,940 They develop models in which each individual, 8 00:00:37,940 --> 00:00:41,820 plant, animal or human of a population are represented. 9 00:00:41,820 --> 00:00:47,149 These computer models can be used to simulate interactions of each individual with 10 00:00:47,149 --> 00:00:48,530 his peers and the environment. 11 00:00:48,530 --> 00:00:53,879 Simulations reveal unexpected collective facts for which mathematical theory 12 00:00:53,879 --> 00:00:55,769 is sometimes difficult to establish. 13 00:00:55,769 --> 00:01:00,570 The transition from individual to collective is at the heart of recent theories of 14 00:01:00,570 --> 00:01:05,600 complexity. occurs in most environmental, social or 15 00:01:05,600 --> 00:01:11,610 societal dynamics. The purpose of LISC research is 16 00:01:11,610 --> 00:01:16,240 to study globals behaviors belonging to individual interactions. 17 00:01:16,240 --> 00:01:22,230 We develop software tools to perform numerical experiments 18 00:01:22,230 --> 00:01:23,610 on these models. 19 00:01:23,610 --> 00:01:29,050 That allows us to study how the globals behaviors observed depend on 20 00:01:29,050 --> 00:01:33,450 models input parameters, which represents interactions between 21 00:01:33,450 --> 00:01:34,450 individuals. 22 00:01:34,450 --> 00:01:39,610 We also develop statistical methods to calibrate these models from data 23 00:01:39,610 --> 00:01:44,650 on global systems and once calibrated these models can be used 24 00:01:44,650 --> 00:01:49,780 to calculate policies actions on systems to ensure their viability or 25 00:01:49,780 --> 00:01:50,780 their resilience. 26 00:01:50,780 --> 00:01:58,180 The LISC participates in national and international multidisciplinary projects in which 27 00:01:58,180 --> 00:02:04,130 collaborate computer scientists, mathematicians but also specialists from ecosystem 28 00:02:04,130 --> 00:02:05,130 or social sciences. 29 00:02:05,130 --> 00:02:09,979 The themes of the team are very diverse for example we are working on forest systems 30 00:02:09,979 --> 00:02:15,810 to adapt forest management to climate change, on the lakes 31 00:02:15,810 --> 00:02:20,239 to better manage eutrophication problems or on the psychological determinants 32 00:02:20,239 --> 00:02:24,810 and social that will push the farmers to convert to organic farming. 33 00:02:24,810 --> 00:02:31,489 This last work is done in collaboration with the LAPSCO laboratory in Clermont-Ferrand. 34 00:02:31,489 --> 00:02:36,659 As part of a call for projects of region Auvergne we built a partnership 35 00:02:36,659 --> 00:02:40,989 with BioFilm Control in order to develop new algorithms allowing 36 00:02:40,989 --> 00:02:44,930 to detect the presence of bacterial bio-film. In some condition bacteria can 37 00:02:44,930 --> 00:02:46,749 produce polymers matrix. 38 00:02:46,749 --> 00:02:51,519 This polymers matrix may allow for proctection of these bacteria when they 39 00:02:51,519 --> 00:02:56,030 are subject to external aggression such as antibiotics. So in this 40 00:02:56,030 --> 00:03:00,159 collaboration we decided with BioFilm Control to develop new 41 00:03:00,159 --> 00:03:04,291 algorithms that allow to have a much finer detection of the presence of these 42 00:03:04,291 --> 00:03:05,291 bacterial bio-film. 43 00:03:05,291 --> 00:03:11,599 On our side, this allows us to have access to industrial data that allow 44 00:03:11,599 --> 00:03:13,840 to feed our methodological research questions. 45 00:03:13,840 --> 00:03:19,489 For BioFilm Control these new algorithms will allow them to have 46 00:03:19,489 --> 00:03:21,959 much finer detection of bacterial bio-film. 47 00:03:21,959 --> 00:03:26,670 This will allow them to develop new 48 00:03:26,670 --> 00:03:27,780 industrial applications. 49 00:03:27,780 --> 00:03:33,499 The assimilation of heterogeneous data allows to model systems and find 50 00:03:33,499 --> 00:03:39,219 solutions to a problem raised by an industrialist or a company.