All content in this area was uploaded by Jerome Jouffroy. Deadline: 01 Sep 2022. Following our previous work, this paper addresses the issue of trajectory. Jerome Jouffroy. Mads Clausen Institute, Sønderborg, Denmark. Overview. KOL Key Opinion. Directeur Industriel chez COBHAM AEROSPACE COMMUNICATIONS 1moAssociate professor Jerome Jouffroy received one of the three teaching awards from the BHJ Foundation. There are 5 professionals named "Jérôme Jouffroy", who use LinkedIn to exchange information, ideas, and opportunities. Fossen (2005). Jouffroy. Jerome Jouffroy This paper presents a study on the development and testing of a model-based heading controller for a sailing yacht. Professor Jerome Jouffroy delves into this crucial discussion in his latest article. Ivar-Andre F. A. Hanne Peoples #825643. This paper addresses the issue of estimating underwater vehicle trajectories using Gyro-Doppler (body-fixed velocities) and acoustic signals (earth-fixed positions). sdu. Content may be subject to copyright. Using Fossen's compact notation for marine vehicles, we first. oktober. Oversigt. It is also closely related to the. . Starting from this model, we then design a nonlinear heading controller using the integrator. Jérôme Jouffroy posted a video on LinkedIn. Using Fossen's compact notation for marine vehicles, we first. Jerome Jouffroy; Jacques Lottin; For original paper see T. Jerome Jouffroy; This paper presents a study on the development and testing of a model-based heading controller for a sailing yacht. Jerome Jouffroy In this paper we develop a simplified mathematical model representing the main elements of the behaviour of sailing vessels as a basis for simulation and controller design. Oversigt; Abstract. Finally, I'd like to thank all my teachers (Andrei-Alexandru Popa (cool guy), Bjarne Schmidt, Thomas Ebel and many more), simply for being good and patient teachers and also Jerome Jouffroy for. Jérôme Jouffroy posted images on LinkedIn. sdu. Share. E. 2005; A trajectory observer for camera-based underwater motion measurements Tor Berg, Jérôme Jouffroy and Vegar Johansen Center for Ships and Ocean Structures (CESOS) Marine Technology Center Norwegian University of Science and Technology (NTNU) NO-7491 Trondheim, Norway Abstract— This paper deals with the issue of estimating the lead very often to poor and non-smooth trajectory estimation. dk. Jerome Jouffroy · J. 44th IEEE Conf. University of Southern Denmark An Accurate Programmable Pulse Generator for Stepper Actuated Real-Time Control Systems. Content may be subject to copyright. von Benzon M, Sørensen FF, Uth E, Jouffroy J, Liniger J, Pedersen S. Her er droner oplagte til at levere udstyr og reservedele, siger Jerome Jouffroy. Jerome JOUFFROY | Cited by 1,241 | of University of Southern Denmark, Odense (SDU) | Read 84 publications | Contact Jerome JOUFFROYAssociate Professor, SDU Mechatronics. pdf. Decentralized receding horizon control for large scale. Enseignant et conférencier | Initiateur d'AlmaMater, du Printemps écologique et de Sailcoop | Plus sur linktr. Department of Mechanical and Electrical Engineering (DME) Professor, SDU Mechatronics (CIM) VIP, SDU Climate Centre. In order to adapt to harsh conditions. Jerome Jouffroy. Découvrez ses expériences et son réseau professionnel comme Yannick SUZANNE. Jerome Jouffroy; Qiuyang Zhou; Oliver Zielinski; Autonomous Lagrangian profilers are widely used as measurement and monitoring platforms. Add to Mendeley. In their current mode of operation, the profilers usually drift passively at their parking depth before making a vertical profile to go back to the surface. Lee USA Wei. This article presents a method for formation control of marine surface vessels inspired by Lagrangian mechanics. Jerome Jouffroy, Jan Opderbecke Underwater vehicle navigation using diffusion-based trajectory observers Oceanic Engineering, IEEE Journal of , 32 ( 2 ) ( 2007 ) , pp. Jerome Jouffroy. In: Proc. Finally, I'd like to thank all my teachers (Andrei-Alexandru Popa (cool guy), Bjarne Schmidt, Thomas Ebel and many more), simply for being good and patient teachers and also Jerome Jouffroy for. 00% VOTES RECEIVED 0. sdu. Report this post Report Report Content uploaded by Jerome Jouffroy. All content in this area was uploaded by Jerome Jouffroy on Sep 02, 2015 . Jerome Jouffroy received the Diplome d'Etudes Approfondies in applied control systems and the Ph. 2013. Krug USA Yoann Ladroit France David Lane UK Stephanie A. Jerome Jouffroy. Content may be subject to copyright. Tor Berg, Jerome Jouffroy, Vegar Johansen. Jouffroy is a surname. Remarks on the Observability of. University of Southern Denmark grade . Install MATLAB and Simulink. . When expanded it provides a list of search options that will switch the search inputs to match the current. PhD. II. Steinar Vike Jerome Jouffroy. Jerome Jouffroy - Google Scholar Jerome Jouffroy Professor, Center for Industrial Mechanics, University of Southern Denmark Verified email at sdu. An. Jerome Jouffroy Contraction theory is a recent tool enabling to study the stabil-ity of nonlinear systems trajectories with respect to one another, and therefore belongs to the class of. Press/Media: Press / Media. Jerome JOUFFROY profil professionnel | Comatelec Schreder - Directeur des operations . Borrelli and G. The functions are treated analytically and by using feedback from the imposed constraint functions, constraint forces arise. Joslin USA Christopher S Judd USA Zheng Kai China Carl Kaiser USA S. Jérôme Jouffroy. [1] Notable people with the surname include: Alain Jouffroy (1928–2015), French writer, poet and artist. pdf. N2 - This paper introduces a methodology for dierential nonlinear stability analysis using contraction theory (Lohmiller and Slotine, 1998). Jerome Jouffroy. Oversigt; Abstract. 25+ million members; 160+ million publication pages; View the profiles of people named Jérôme Jouffroy. Authors: Ana Ionesi, Hossein Ramezani, Jerome Jouffroy Download a PDF of the paper titled On-line parameter and state estimation of an air handling unit model: experimental results using the modulating function method, by Ana Ionesi and 2. 0. Keviczky, T. org IEEE Conference on Decision and Control (CDC’04), Paradise Island, Bahamas, 2004 Abstract —This paper presents a globally. This paper is concerned with utilizing stochastic contraction theory to conclude onThis paper addresses the issue of estimating under- water vehicle trajectories using gyro-Doppler (body-fixed veloci- ties) and acoustic positioning signals (earth-fixed positions). This paper presents a study on the development and testing of a model-based heading controller for a sailing yacht. in a Wearing Maneuver Jerome Jouffroy ∗ ∗ Mads Clausen Institute University of Southern Denmark (SDU. Decentralized receding horizon control for large scale. 1 Media contribution. Jerome Jouffroy. Download PDF Abstract: This note places into perspective the so-called time-derivative estimation method recently introduced by Fliess and co-authors with standard results from linear state-space theory for control systems. Jerome Jouffroy; This paper presents a study on the development and testing of a model-based heading controller for a sailing yacht. The French National Cyclo-cross Championships is a cycling race that is held to decide the best French cyclist in the cyclo-cross discipline. Data. . 2003. Di Meglio, R. dk Oliver Zielinski Institute for Chemistry and BiologyPeople named Jouffroy Jérôme. View the profiles of people named Jerome Jouffroy. This paper presents a simulation model environment for the popular and low-cost remotely operated vehicle (ROV) BlueROV2 implemented in Simulink™ which has been designed and experimentally validated for benchmark control algorithms for underwater vehicles. Fossen. (2010) designed the controller for the rudder based on the feedback linearization technique, Xiao and Jouffroy (2011) and He et al. RANK 8,122 of 19,157. Jouffroy-2003un. The BlueROV2 model is based on Fossen’s equations and includes. Vazquez, M. Related Papers. Join Facebook to connect with Jérôme Jouffroy and others you may know. Contributors : Andrei-Alexandru Popa; Lars Duggen; Olgierd K. The desired formation configuration is given as a set of constraint functions. Report this post Report Report 8th IFAC Conference on Control Applications in Marine Systems Rostock-Warnemünde, Germany September 15-17, 2010 Reflexions on Feedforward Control Strategies for a Class of Sailing Vehicles Lin Xiao and Jerome Jouffroy Mads Clausen Institute University of Southern Denmark (SDU) Alsion 2, DK-6400, Sønderborg, Denmark e-mail: {xiao,jerome}@mci. The purpose of Experts in teams is, to challenge the students to further develop the knowledge, skills and competencies gained during the first four semesters in a real-life engineering context – that is: a context with many stakeholders, cooperation with people bringing different types of competencies into play, real requirements and. Hélène JOUFFROY. E-mail jerome @ sdu. View all 15 press / media Teaching & Supervision Experts in Teams. REPUTATION 100. May 2018; Junsoo Kim; Chanhwa Lee;In this paper we develop a simplified mathematical model representing the main elements of the behaviour of sailing vessels as a basis for simulation and controller design. In their current mode of operation, the profilers usually. Proceedings of OCEANS 2005 MTS/IEEE. | Find, read and cite all the research you need. Presse/medie. This button displays the currently selected search type. Using Fossen's compact notation for marine vehicles, we first. 5 pounds and 22 inches long, it uses narrow-band (or “comb”) jamming to ensure as little interference with other devices as possible. IEEE/ASME International Conference on Advanced Intelligent Mechatronics, AIM. Facebook gives people the power to share and makes the world more open and. N2 - Because contraction analysis stems from a differential and incremental framework, the nature and methodology of contraction-based proofs are significantly different from those of their Lyapunov-based counterparts. dk. Since the. The control law. Using Fossen's compact notation for marine vehicles, we first. Jerome Jouffroy. Jerome Jouffroy Central pattern generators (CPG) are oscillatory systems that are responsible for generating rhythmic patterns at the origin of many biological activities such as for example. Jouffroy, Ifremer J. Jiaxi He Lin Xiao Jerome Jou roy Mads Clausen Institute, University of Southern Denmark (SDU), Alsion 2, DK-6400, S˝nderborg, Denmark jiaxihe1989@gmail. Jérôme Jouffre. Ilmenau, Germany 18-20 March 2019 IEEE Catalog Number: ISBN: CFP19MCH-POD 978-1-5386-6960-0 2019 IEEE International Conference on Mechatronics (ICM 2019)Jerome JOUFFROY(ORLÉANS). , 3. 2007; TLDR. Ophavsret. In particular, it is shown that the algebraic method can essentially be seen as a special case of deadbeat state. Y1 - 2014/4. Engineering, Environmental Science. E. Jerome Jouffroy; Thor I. PhD. Using Fossen's compact notation for marine vehicles, we first. 2. AU - Jouffroy, Jerome. Content may be subject to copyright. However, note that the results shown in the present paperJerome Jouffroy Denmark James B. 39, no. PY - 2010. A trajectory observ er for camera-based underwater. Starting date is November 2022. Jerome Jouffroy. The proposed approach consists of a diffusion-based trajectory observer (Jouffroy and Opderbecke, 2004) processing whole segments of a trajectory. iv. See Photos. Jerome Jouffroy Professor at Syddansk Universitet - University of Southern Denmark 20h Edited Report this post Lately, there has been a debate on the contribution of Danish universities on. The last expression can be regarded as an extension of the well-known Krasovskii method using a time and state dependent metric. After briefly presenting a model of building. Jérôme Jouffroy posted a video on LinkedIn. A remark on "Nonlinear output feedback control of underwater vehicle propellers using feedback form estimated axial flow velocityE-mails: ramezani@mci. ad. Associate professor Jerome Jouffroy received one of the three teaching awards from the BHJ FoundationProfessor Jerome Jouffroy, an expert in Drone Mechatronics at the University of Southern Denmark, shares his perspective. Jouffroy-2003un. no, fossen@ieee. Jerome Jouffroy. Autonomous Lagrangian profilers are now widely used as measurement and monitoring platforms, notably in observation programs as Argo. Lee USA Wei. Contributors: Robert Brehm; Mohammad Hossein Ramezani; Jerome Jouffroy Show more detail. Sign Up. Jérôme Jouffroy posted a video on LinkedIn. In this paper, we extend the original definition of contrac- tion theory to incorporate in an explicit manner the. 25+ million members; 160+ million publication pages; Yachts, IEEE JOUFFROY AND OPDERBECKE: UNDERWATER VEHICLE NAVIGATION USING DIFFUSION-BASED TRAJECTORY OBSERVERS 319 D. Interestingly. no; [email protected] Jouffroy. Using Fossen's compact notation for marine vehicles, we first. or. Join. Control systems, model-based. ad. dk ABSTRACT In this paper we develop a simplified mathematicaljerome@mci. Vincent, Ifremer . Jérôme Jouffroy’s Post Jérôme Jouffroy Directeur Industriel chez COBHAM AEROSPACE COMMUNICATIONS 10mo Report this post Report Report. The BlueROV2 model is based on Fossen’s equations and includes a kinematic model of the. no). by Jerome Jouffroy This paper studies the position estimation of an underwater vehicle using a single acoustic transponder. Facebook gives people the power to share and makes the world more open and. Formation control for a fleet of. Real-Time Geo-Referenced Video Mosaicking with the MATISSE System . 1405776 Corpus ID: 14138265; Towards on-line underwater vehicle trajectory estimation using diffusion-based observers @article{Jouffroy2004TowardsOU, title={Towards on-line underwater vehicle trajectory estimation using diffusion-based observers}, author={J{'e}r{^o}me Jouffroy and Tu Due. Syddansk Universitet On steering a sailing ship in a wearing maneuver Jouffroy, Jerome Publication date: 2009 Document version Publisher's PDF, also known as Version of record Citation for pulished version (APA): Jouffroy, J. In their current mode of operation, the profilers usually. . CONTRIBUTIONS 0 Questions 0 Answers. sdu. Quick Start Instructions. Back. Fossen, Affiliation: University of Southern Denmark, NTNU, Department of Engineering Cybernetics and NTNU, Centre for Ships and Ocean Structures Reference: 2010, Vol 31, No 3, pp. Andrei Popa, Simon Iversen, Lars Duggen & Jerome Jouffroy Advanced Manufacturing Research Center, Youngstown State University, Youngstown, OH, 44555, USA Brian Zellers, Dillon Kennedy, Pedro Cortes, Brett Conner & Eric MacDonaldOn algebraic time-derivative estimation and deadbeat state reconstruction Johann Reger† and Jerome Jouffroy‡ Abstract— This paper places into perspective the so-called practical interest, we recall here only the main result for a algebraic time-derivative estimation method recently introduced moving-horizon version of the approach (see [21] and [35]). ee/maximeblondeauJerome Jouffroy; FreeD is a project at Center for Unmanned Aerial Vehicles, University of Southern Denmark (SDU): . Facebook gives people the power to. The approach is indeed interesting, even though it. no). 1 Media contribution. On steering a sailing ship in a wearing maneuver. Professor Jerome Jouffroy delves into this crucial discussion in his latest article. On a historical perspective, note that results very closedAll figure content in this area was uploaded by Jerome Jouffroy. see FAQ. Agus Hasan and Jerome Jouffroy / Energy Procedia 00 (2017) 000–000 [10] F. This paper places into perspective the so-called algebraic time-derivative estimation method recently introduced by Fliess and co-authors with standard results from linear state- space theory for control systems. Det er ikke let at bygge en drone, som kan håndtere så tunge løft, som det Jerome Jouffroy og hans forskningskolleger planlægger, deres drone skal kunne. Jerome Jouffroy. | Underwater, Observer and Motion. Jérôme Jouffroy’s Post Jérôme Jouffroy Directeur Industriel chez COBHAM AEROSPACE COMMUNICATIONS 1y Report this post Report Report. Balas (2006). Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list. Dov Kruger, Rustam Stolkin, Aaron Blum, and Joseph Briganti. Content may be subject to copyright. -J. Uniform global exponential stability (UGES) of the resulting system is proven. Jérôme Jouffroy posted a video on LinkedIn. Jerome Jouffroy. Florence Garnier. (2012. Log In. However, it seems that earlier results derived by mathematicians in the 1950s closely match some of the results of contraction analysis. Jerome Jouffroy; This paper presents a study on the development and testing of a model-based heading controller for a sailing yacht. Add to Mendeley. After entering the Benedictine order and teaching at the. Discover the world's research. Content may be subject to copyright. 313 - 326 , 10. Starting date is November 2022. Authors: Johann Reger, Jérôme Jouffroy. - Der er nogle nøgleudfordringer, der skal overvindes. Finally, I'd like to thank all my teachers (Andrei-Alexandru Popa (cool guy), Bjarne Schmidt, Thomas Ebel and many more), simply for being good and patient teachers and also Jerome Jouffroy for. sdu. While the use of Lyapunov function candidates for integrator backstepping has been extensively studied in the literature. SMC 2006: 2584-2589. In a world where geopolitical shifts are reshaping the landscape, we must consider the role of innovation in. dk). sdu. Sustainable Development Goals; Study programmes. C. Original language: English: Title of host publication: Proceedings of the 2018 Winter Simulation Conference : Simulation for a Noble Cause: Editors: M. Formation Control of Marine Surface Craft using Lagrange Multipliers. 2004. Additionally, as proposed in Jouffroy [8][7], the explicit. Report this post Report Report Methodological remarks on contraction theory: Matlab/Simulink file of section 5. Content may be subject to copyright. [11] A. JOUFFROY Jérôme : Jérôme JOUFFROY, né en 1970 et habite DIJON. In MTS/IEEE Oceans, Kona, HI, September 2011. January 2005. In this paper, we investigate motion. Fossen, Affiliation: University of Southern Denmark, NTNU, Department of Engineering Cybernetics and NTNU, Centre for Ships and Ocean Structures Reference: 2010, Vol 31, No 3, pp. e. In particular, it is shown that the algebraic method can in a. . In a previous study (see Jouffroy et al. Content available from Jerome Jouffroy: Ihle-2006joe31(4). Contraction theory is a recently developed nonlinear analysis tool which may be useful for solving a variety of non linear control problems. INTERNALLY ACTUATED AUTONOMOUS SAILNG BUOY This application is a National Stage Application of PCT/ DK2012/050402, filed 31 Oct. Content uploaded by Jerome Jouffroy. Jérôme Jouffroy posted a video on LinkedIn. In: Proc. Bojan Nemec, Fares J. We propose a method for constructing control laws for formation control of marine craft using classical tools from analytical mechanics. This paper presents a method for formation control of marine surface craft inspired by Lagrangian mechanics. Jerome Jouffroy; This paper addresses the issue of rejecting spurious acoustic position measurements for the estimation of trajectories in underwater vehicle navigation. . ANSWER ACCEPTANCE 0. PY - 2014/4. by Fliess. AVERAGE RATING 0. N1 - Funding Information: ACKNOWLEDGMENTS The authors thank Markus Weber for his early investigations on the Lagrange system structure that led to the formulation framework of the present work. (Jouffroy and Opderbecke, 2004) processing whole segments of a trajectory at a time. Two people are usually required for operating serpentine robot, one for pushing and twisting, and the other for controlling the tip. Institute for Chemistry and. XIAO AND JOUFFROY: MODELING AND NONLINEAR HEADING CONTROL OF SAILING YACHTS 3Jerome Jouffroy and Benny Lassen are with the Mads Clausen Institute, University of Southern Denmark, Alsion 2, 6400 Sønderborg, Denmark. Jerome Jouffroy Contraction analysis is a recent tool for analyz- ing the convergence behavior of nonlinear systems in state- space form (see Lohmiller and Slotine [16] for the main reference). Softwareagenten in der Industrie 4. Fossen and M. Jerome Jouffroy; Qiuyang Zhou; Oliver Zielinski; Autonomous Lagrangian profilers are widely used as measurement and monitoring platforms. Alina Voda. Associate professor Jerome Jouffroy received one of the three teaching awards from the BHJ FoundationLin Xiao 1 and Jerome Jouffroy 1. This repository contains MATLAB scripts and Simulink models for the purpose of creating a low-level controller for UBC Sailbot. Author content. The first edition took place in 1902. University of Southern Denmark On steering a sailing ship in a wearing maneuver Jouffroy, Jerome. Show more. Source: check_circle. Control systems, model-based simulations, digital twin, intelligent systems, robotics,. (2011a) and Jouffroy et al. 93-106. Petit, †Backstepping Stabilization of an Underactuated 3x3 Linear Hyperbolic System of Fluid Flow Equations†, American Control Conference, Montreal, Canada, 2012. Jerome Jouffroy works at SDU Mechatronics, The Mads Clausen Institute, Univ and is well known for Constraint Functions, Sailing Yachts and Marine Craft. All figure content in this area was uploaded by Jerome Jouffroy. Jerome Jouffroy This paper studies the position estimation of an underwater vehicle using a single acoustic transponder. Part of ISBN: 978-1-958651-10-0. Jerome. Share. In particular, it is shown that the algebraic method can in a sense be. Institut for Mekanik og Elektronik (IME) Professor, SDU Mechatronics (CIM) Professor, SDU Climate Cluster. or. In a typical mode of operation, the profilers drift passively at their parking depth before making a vertical profile to go back to the surface. Some ancestors of contraction analysis Jérôme Jouffroy Center for Ships and Ocean Structures (CeSOS) Norwegian University of Science and Technology (NTNU) NO-7491 Trondheim, Norway e-mail: jouffroy@ntnu. Accepted 18 Jul 2011. E-mail:ihle@ntnu. PhD. SDU Mechatronics and the Centre of Industrial Mechanics, part of the Department of Mechanical and Electrical Engineering and the Faculty of Engineering at the University of Southern Denmark in S ø nderborg, invites applications for a position as postdoctoral researcher in control engineering. In a world where geopolitical shifts are reshaping the landscape, we must consider the role of innovation in. Krstic, and N. Citations (0) References (0) ResearchGate has not been able to resolve any citations for this publication. Research Unit UCL. Jerome Jouffroy & 04. O N - L I N E PAR A M E T E R A N D S TATE E S T I M ATI O N O F A N A I RAgus Hasan* and Jerome Jouffroy Center for UnmannedAircraft Systems Mærsk McKinney Møller Institute,University of Southern Denmark, 5230 Odense, Denmark Abstract This paper presents boundary observer design for state-of-charge (SOC) estimation of lithium-ion batteries. The paper presents a systematic method for design of observer-controllers in cascade. pdf. PY - 2014/4. In a world where geopolitical shifts are reshaping the landscape, we must consider the role of innovation in. Jerome Jouffroy. fr Manon. dk Abstract: Sailing vehicles, whether they are. Jørgensen, Thiusius Rajeeth Savarimuthu, Jérôme Jouffroy, Henrik Gordon Petersen, Norbert Krüger: Transfer of assembly operations to new workpiece poses by adaptation to the desired force profile. E. Keviczky, T. Founder and CEO at ADVISO WP (Faire rayonner votre entreprise ou association, c'est possible !Ivar-Andre F. If you love a cozy, comedic mystery, you'll love this 'whodunit' adventure. downlo. About the institute. Jerome Jouffroy. Mads Clausen Institute. no, jouffroy@ntnu. Jouffroy is with the Center for Ships and Ocean Structures, Norwegian University of Science and Technology, Trondheim NO-7491, Norway (e-mail: jouffroy@marin. dk). 2006 • Yuri Rzhanov. | Underwater, Observer and Motion. e. Pendant la Seconde Guerre mondiale, les avions de chasse revenaient de la bataille avec des impacts de balles. (2009). It is also closely related to the. In the work presented by Fossen and Blanke, a nonlinear observer for estimation of. Facebook gives people the power. 93-106. US 9,139,272 B2 1. This button displays the currently selected search type. JOUFFROY & FILEAS | 322 followers on LinkedIn. com fxiao,jeromeg@mci. Jerome Jouffroy; This paper presents a study on the development and testing of a model-based heading controller for a sailing yacht. Jouffroy, and T. The functions are treated analytically and by using feedback from the imposed constraint functions, constraint forces arise. , 1999. Since the. Log in or sign up for Facebook to connect with friends, family and people you know. Mere om Teknologiens Mediehus. Slotine. Towards selective tidal-stream transport for lagrangian profilers. Joslin USA Christopher S Judd USA Zheng Kai China Carl Kaiser USA S. Jerome Jouffroy Kasper Mayntz Paasch Lin Xiao Current Assignee (The listed assignees may be inaccurate. 1412–1473) was a French prelate and diplomat. OCEANS 2006. Jerome Jouffroy Johann Reger In this paper, we propose the concept of accelerated convergence that has originally been developed to speed up the convergence of numerical methods for extremum. Cite. 2005. 4DOF simulation of a sailing yacht (includes roll) with a 3D animation using the Simulink 3D Animation toolbox. Om Teknologiens Mediehus. A simple extension of contraction theory to study incremental stability properties. Authors: Johann Reger, Jérôme Jouffroy. . Christelle Jerome Jouffroy is on Facebook.