Damien Olivier - Academia.edu (original) (raw)

Papers by Damien Olivier

Research paper thumbnail of Centroids : a decentralized approach

HAL (Le Centre pour la Communication Scientifique Directe), Sep 12, 2011

Research paper thumbnail of Morphogenesis of street networks. A reaction-diffusion system for self-organized cities

arXiv (Cornell University), Nov 5, 2021

Research paper thumbnail of Morphogenesis of Complex Networks: A Reaction Diffusion Framework for Spatial Graphs

Studies in computational intelligence, Dec 2, 2018

Research paper thumbnail of Exploitation of a displacement survey to detect road network use vulnerability

HAL (Le Centre pour la Communication Scientifique Directe), 2009

Research paper thumbnail of Modeling antibiotic resistance in hospitals: The impact of minimizing treatment duration

Journal of Theoretical Biology, Dec 1, 2007

Research paper thumbnail of Spatial detection of organization under evacuation situation

HAL (Le Centre pour la Communication Scientifique Directe), 2008

Research paper thumbnail of Analyse multi-échelle de la vulnérabilité des réseaux des systèmes territoriaux

HAL (Le Centre pour la Communication Scientifique Directe), Nov 23, 2011

Research paper thumbnail of Active Objects to Develop Computer Games for Blind Children

HAL (Le Centre pour la Communication Scientifique Directe), Nov 28, 2002

Research paper thumbnail of An Actor Architecture to Develop Games for Blind Children

HAL (Le Centre pour la Communication Scientifique Directe), Nov 19, 2003

Research paper thumbnail of The Impact of Different Antibiotic Regimens on the Emergence of Antimicrobial-Resistant Bacteria

Research paper thumbnail of Dagda, a load-balanced middleware to distribute Complex Systems simulations

HAL (Le Centre pour la Communication Scientifique Directe), Jun 29, 2009

Research paper thumbnail of Modeling of the Vulnerability Related to the Dynamic Road Traffic

HAL (Le Centre pour la Communication Scientifique Directe), 2008

Research paper thumbnail of Cognitive Emotional Based Architecture for Crowd Simulation

HAL (Le Centre pour la Communication Scientifique Directe), Jun 1, 2012

Research paper thumbnail of A Dynamic Vulnerability Map to Assess the Risk of Road

HAL (Le Centre pour la Communication Scientifique Directe), 2008

Research paper thumbnail of Adaptive Behaviour for Prisoner Dilemma Strategies Based on Automata with Multiplicities

HAL (Le Centre pour la Communication Scientifique Directe), Oct 23, 2002

Research paper thumbnail of Simulations distribuées par un algorithme fourmi

HAL (Le Centre pour la Communication Scientifique Directe), Oct 15, 2003

Research paper thumbnail of Systèmes dynamiques avec Netlogo

HAL (Le Centre pour la Communication Scientifique Directe), 2015

Research paper thumbnail of Dynamical Systems with NetLogo

Numerous scientific fields are involved in the study of real-world phenomena based on theoretical... more Numerous scientific fields are involved in the study of real-world phenomena based on theoretical models. These can have many different roles, going from describing problems, so as to understand them better, to predicting how they will evolve. This last aspect requires the representation of the phenomenon’s dynamics, which allows for the chosen model’s evolution over time to be followed. In order to accomplish this, the problem can be presented at different scales. Roughly speaking, it can be said that there are two main scales: the microscopic scale, which is centered on the modeling of individuals, and the macroscopic scale, which relies on mathematical theories proposed in the context of dynamic systems.

Research paper thumbnail of Pyocyanic Bacillus Propagation Simulation

Nosocomial diseases are pathologies that appear during medical care that were not present at pati... more Nosocomial diseases are pathologies that appear during medical care that were not present at patient admission. Being able to simulate the propagation of such diseases inside an hospital and to track them is therefore important to fight and avoid them. The Pyocyanic Bacillus is a frequent example of such a disease. It is important to understand how such bacteria propagate since more and more of their strains become antibiotic resistant. Therefore we must not only be able to treat them, but also to block their diffusion to avoid them. The work presented here consist in a simulation of the propagation of pyos inside an hospital taking spatial problems into account, and allowing to better understand the infection diffusion mechanisms and to propose some means to circumvent it. The simulation considers both the spacial representation of the hospital, and the different actors, healthcare workers, patients and visitors.

Research paper thumbnail of Proceedings of EPNADS'05, Emergent Properties in Natural and Artificial Dynamical Systems, a satellite workshop within ECCS'05

HAL (Le Centre pour la Communication Scientifique Directe), Nov 17, 2005

A consequence of very fast technology development is the appearance of new phenomena in man made ... more A consequence of very fast technology development is the appearance of new phenomena in man made systems related to their large number of heterogeneous interacting components. Then because of resulting larger complexity over passing human operator capability, the system can no longer be only guided and controlled at trajectory level. A larger and more global delegation should be given the system at decision making, and it is proposed here to manage it at task level usually corresponding to well identified sequences in system operation. To succeed in this transfer attention has to be paid to the fact that there are in general many trajectories for one prescribed task. So a new and completely transparent link should be established between trajectory and task controls, both acting at their own levels in the system. The corresponding double loop control is developed here, and consists mainly in an asymptotically stable functional control acting at trajectory level as a whole, and explicit in terms of main system power bounds guaranteeing robustness inside a ball the size of which is the manifold generated by all system trajectories for task accomplishment. At higher level a new decision control based on trajectory utility for succeeding in the task is proposed, the role of which is to maintain system dynamics inside the selected trajectory manifold corresponding to task. With this two step control, human operator role is eased and can be more oriented toward higher coordination and maintenance management.

Research paper thumbnail of Centroids : a decentralized approach

HAL (Le Centre pour la Communication Scientifique Directe), Sep 12, 2011

Research paper thumbnail of Morphogenesis of street networks. A reaction-diffusion system for self-organized cities

arXiv (Cornell University), Nov 5, 2021

Research paper thumbnail of Morphogenesis of Complex Networks: A Reaction Diffusion Framework for Spatial Graphs

Studies in computational intelligence, Dec 2, 2018

Research paper thumbnail of Exploitation of a displacement survey to detect road network use vulnerability

HAL (Le Centre pour la Communication Scientifique Directe), 2009

Research paper thumbnail of Modeling antibiotic resistance in hospitals: The impact of minimizing treatment duration

Journal of Theoretical Biology, Dec 1, 2007

Research paper thumbnail of Spatial detection of organization under evacuation situation

HAL (Le Centre pour la Communication Scientifique Directe), 2008

Research paper thumbnail of Analyse multi-échelle de la vulnérabilité des réseaux des systèmes territoriaux

HAL (Le Centre pour la Communication Scientifique Directe), Nov 23, 2011

Research paper thumbnail of Active Objects to Develop Computer Games for Blind Children

HAL (Le Centre pour la Communication Scientifique Directe), Nov 28, 2002

Research paper thumbnail of An Actor Architecture to Develop Games for Blind Children

HAL (Le Centre pour la Communication Scientifique Directe), Nov 19, 2003

Research paper thumbnail of The Impact of Different Antibiotic Regimens on the Emergence of Antimicrobial-Resistant Bacteria

Research paper thumbnail of Dagda, a load-balanced middleware to distribute Complex Systems simulations

HAL (Le Centre pour la Communication Scientifique Directe), Jun 29, 2009

Research paper thumbnail of Modeling of the Vulnerability Related to the Dynamic Road Traffic

HAL (Le Centre pour la Communication Scientifique Directe), 2008

Research paper thumbnail of Cognitive Emotional Based Architecture for Crowd Simulation

HAL (Le Centre pour la Communication Scientifique Directe), Jun 1, 2012

Research paper thumbnail of A Dynamic Vulnerability Map to Assess the Risk of Road

HAL (Le Centre pour la Communication Scientifique Directe), 2008

Research paper thumbnail of Adaptive Behaviour for Prisoner Dilemma Strategies Based on Automata with Multiplicities

HAL (Le Centre pour la Communication Scientifique Directe), Oct 23, 2002

Research paper thumbnail of Simulations distribuées par un algorithme fourmi

HAL (Le Centre pour la Communication Scientifique Directe), Oct 15, 2003

Research paper thumbnail of Systèmes dynamiques avec Netlogo

HAL (Le Centre pour la Communication Scientifique Directe), 2015

Research paper thumbnail of Dynamical Systems with NetLogo

Numerous scientific fields are involved in the study of real-world phenomena based on theoretical... more Numerous scientific fields are involved in the study of real-world phenomena based on theoretical models. These can have many different roles, going from describing problems, so as to understand them better, to predicting how they will evolve. This last aspect requires the representation of the phenomenon’s dynamics, which allows for the chosen model’s evolution over time to be followed. In order to accomplish this, the problem can be presented at different scales. Roughly speaking, it can be said that there are two main scales: the microscopic scale, which is centered on the modeling of individuals, and the macroscopic scale, which relies on mathematical theories proposed in the context of dynamic systems.

Research paper thumbnail of Pyocyanic Bacillus Propagation Simulation

Nosocomial diseases are pathologies that appear during medical care that were not present at pati... more Nosocomial diseases are pathologies that appear during medical care that were not present at patient admission. Being able to simulate the propagation of such diseases inside an hospital and to track them is therefore important to fight and avoid them. The Pyocyanic Bacillus is a frequent example of such a disease. It is important to understand how such bacteria propagate since more and more of their strains become antibiotic resistant. Therefore we must not only be able to treat them, but also to block their diffusion to avoid them. The work presented here consist in a simulation of the propagation of pyos inside an hospital taking spatial problems into account, and allowing to better understand the infection diffusion mechanisms and to propose some means to circumvent it. The simulation considers both the spacial representation of the hospital, and the different actors, healthcare workers, patients and visitors.

Research paper thumbnail of Proceedings of EPNADS'05, Emergent Properties in Natural and Artificial Dynamical Systems, a satellite workshop within ECCS'05

HAL (Le Centre pour la Communication Scientifique Directe), Nov 17, 2005

A consequence of very fast technology development is the appearance of new phenomena in man made ... more A consequence of very fast technology development is the appearance of new phenomena in man made systems related to their large number of heterogeneous interacting components. Then because of resulting larger complexity over passing human operator capability, the system can no longer be only guided and controlled at trajectory level. A larger and more global delegation should be given the system at decision making, and it is proposed here to manage it at task level usually corresponding to well identified sequences in system operation. To succeed in this transfer attention has to be paid to the fact that there are in general many trajectories for one prescribed task. So a new and completely transparent link should be established between trajectory and task controls, both acting at their own levels in the system. The corresponding double loop control is developed here, and consists mainly in an asymptotically stable functional control acting at trajectory level as a whole, and explicit in terms of main system power bounds guaranteeing robustness inside a ball the size of which is the manifold generated by all system trajectories for task accomplishment. At higher level a new decision control based on trajectory utility for succeeding in the task is proposed, the role of which is to maintain system dynamics inside the selected trajectory manifold corresponding to task. With this two step control, human operator role is eased and can be more oriented toward higher coordination and maintenance management.