| Keynote Opening Lectures
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| Keynote opening lectures |
1. Celso Grebogi
http://www.abdn.ac.uk/icsmb/people/details/grebogi
Institute for Complex Systems and Mathematical Biology
School of Natural and Computing Sciences
King's College
University of Aberdeen
Old Aberdeen AB24 3UE, UK
Tittle: Trafic Jam Generates Phase Transition in Translation
The traffic dynamics can be studied by considering the current of particles on a lattice, where to each lattice site a different hopping probability is associated and the particles can move only in one direction. I will show that a traffic jam of particles behind a slow site can lead to a first-order phase transition, and derive analytical expressions for the stochastic configuration of slow sites for this to happen. I will apply this traffic-engineering model to describe the translation of mRNAs and show that the first-order phase transition, uncovered in this work, is the process responsible for the classification of the proteins having different biological functions.
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Queueing Phase Transition: Theory of Translation, M. Romano, M. Thiel, I. Stansfield and C. Grebogi, Phys. Rev. Lett. 102, 198104 (2009)
Professor Celso Grebogi earned his bachelor's degree in chemical engineering from the Universidade Federal do Parana in Curitiba (Brazil) in 1970. He became then "Professor Auxiliar" in the Departamento de Fisica at the Pontificia Universidade Catolica in Rio de Janeiro, where he remained until 1974. Professor Grebogi decided to pursue graduate studies in the United States after he was awarded the Fulbright Fellowship. He received his M.S. and Ph.D. degrees from the Department of Physics and Astronomy, University of Maryland at College Park. After obtaining his doctoral degree in 1978, he joined the University of California at Berkeley as a post-doctoral fellow. In 1981, Professor Grebogi returned to the University of Maryland as a faculty, but joined the Department of Mathematics as a Professor in 1990, with joint appointments at the Institute for Plasma Research and the Institute for Physical Science and Technology. He has remained at the University of Maryland as a Full Professor until 2001 when he resigned to go back to Brazil as Full Professor at the Institute of Physics, University of Sao Paulo. In 2005, he was invited to join the University of Aberdeen as the "Sixth Century Chair in Nonlinear and Complex Systems".
Professor Grebogi did extensive research in the field of plasma physics before his work on chaotic dynamics. Professor Grebogi's research on chaotic dynamical systems combines analytical methods and techniques with extensive computer experiments utilizing state-of-the-art computational facilities. The objective of the research is to establish basic mathematical principles so that scientists and engineers can then apply these principles to understand and analyze the systems they are investigating in their own fields. Using this approach Professor Grebogi has obtained a number of important results e.g.: the establishment of "crises" is the fundamental process by which chaotic attractors undergo sudden changes as a system parameter varies; the mathematical theory and experimental verification of how transient chaos phenomena are likely to manifest themselves in practice; and the work on fractal basin boundaries that pointed out the important practical consequences of this type of boundary. The current research focuses on systems biology, methods to control chaos, the dynamics of spatio-temporal systems, active processes in chaotic flows, and the rigorous determination of how long actual trajectories of a chaotic process stay near a given numerical trajectory, i.e. the problem of shadowing. Professor Grebogi has also been arguing that, when analyzing systems which exhibit irregular behavior, modeling must be expanded to include algorithms which make use of measured time series. These ideas which include observation, analysis, and control of chaotic systems have been widely implemented by experimental scientists and engineers.
In recognition of Professor Grebogi's scientific accomplishments, which amounted to over three hundred publications, and the delivery of over three hundred invited lectures at international conferences and at universities and other institutions, he received many awards, prizes, and other distinctions. Among them, he was recipient of the Doctor Honoris Causa Degree (Dr. re. nat. h. c.) from the University of Potsdam - Germany, Honorary Professorship from University of Aberdeen - Scotland, Toshiba Chair as a World-renowned Scholar from the Waseda University - Japan, Humboldt Senior Prize from Germany, and selected as a University of Maryland Distinguished Research Faculty. He is also a non-executive External Scientific Director (Mitglied) of the Max Planck Institute for the Physics of Complex Systems in Dresden, a Fellow of the American Physical Society, a Full Member of the Brazilian Academy of Sciences, and a Fellow of TWAS - The Academy of Sciences for the Developing World. He is a Thompson-ISI Highly Cited Author with over 15,000 citations. His H-index is 60.
2. Hans Ingo Weber
http://www.mec.puc-rio.br/dem_perfil.php?id=40
Pontifíca Universidade Católica do Rio Janeiro
Departamento de Engenharia Mecânica
Title: Numerical and Experimental analysis of the nonlinearities of an embarked vibro-impact system in an oscillatory structure.
Some mechanical systems may present a regular vibration pattern that is strongly related to its normal operation. Usually one foresees damping mechanisms to reduce these undesirable side effects. On the other hand, there may occur applications where these mechanical systems undergo a stick-slip condition and, in this case, one could think on a subsystem able to produce impacts strong enough to liberate the stick condition. Ideally this subsystem would make use of some of the energy of the vibration. The example we focus is the oil well drilling with tricone bits which produce a tri-lobular cutting surface on hard rocks and forces a longitudinal vibration in the bottom hole assembly (BHA). The subsystem is an elastically suspended hammer embarked in the BHA which operates near resonance and generates impacts. The stress wave propagates to the drill bit, where it helps the dynamic load to fragment the rock. As a result an increase in the rate of penetration is expected.
There were done several investigations along the last years to improve the performance of the device. Its operation was modeled considering a hammering process embarked in a moving platform. The investigation concerns the development of a reliable model to improve the design of a ready to use hammer for a specific application. Several interesting dynamic problems occur in the solution. Its complexity is summarized in the Peterka map, which shows the different regions of a certain number of impacts in relation to the vibration cycle of the platform. Regions of maximum impact force are defined experimentally validating the analytic model. Bifurcation diagrams, Poincaré maps, jumps, chaos in the transition regions are shown. The behavior of the model can be visually and acoustically followed in the experiment.
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Professor Hans Ingo Weber grow up in São Paulo, after his family got the status of “displaced persons”, since they had to leave northern bohemia in 1946, and emigrated to Brazil. He graduated in 1966 as mechanical engineer from the Polytechnic School of the University of São Paulo. At that time the graduate studies were being introduced in some Brazilian universities and he got his M.Sc. from the Federal University of Rio de Janeiro in 1968. He started as an assistant professor in this university and soon after got a fellowship from the DAAD – German Academic Exchange Service completing his Dr.-Ing. degree at the Technical University of Munich in 1971. His work concerned the attitude control of satellites using reaction wheels and was advised by gyroscope specialist Kurt Magnus and his co-worker Werner Schiehlen. Back in Rio de Janeiro in 1972 after 2 years at the Federal University he followed the challenge of a new university, UNICAMP, which was being established as a leading research university in the country. In the decade from 1974 to 1984 the Mechanical Design group was formed from scratch to about a faculty of 25 persons. In the first 8 years main research topics concerned energy storage in high speed flywheels (that was result of the first global petroleum crisis) and afterwards the topic dynamics of huge hydroelectric machinery. In 1985 part of the faculty created one of the first Computational Mechanics departments in Brazil. In this pioneering time some initiatives are strongly connected to Prof. Weber: a national conference in Mechanical Engineering which started in 1973 in Rio de Janeiro and lead to the biennial COBEM conference, the foundation of ABCM – Brazilian Society of Mechanical Sciences and Engineering in April 1975 in Campinas, and the DINAME biennial international symposium on Dynamics of Mechanical Systems which started in 1986. In this period of time Prof. Weber spent the year of 1982 and part of 1984 at the University of Stuttgart as a fellow of the Alexander von Humboldt Foundation. The next decade, 1985 to 1995 corresponded to a period with a direct connection to Industry: 6 years was the time he spent as director of the Center of Technology of UNICAMP, a center of specialized technical and metrological support to industry. Two of these years were also spent as director of the Ciatec company, which belongs to the city of Campinas and is related to a high-tech park. He was also member of the Scientific and Technological Council of the chemical company Rhodia for a couple of years.
Moving again to Rio de Janeiro in 1996 Prof. Weber assumed a full professor position at the Pontifical Catholic University of Rio de Janeiro in 1998. Since that time he is active in the area of Dynamics of Mechanical Systems and his main research topics are drill string dynamics, impact dynamics, inertial systems or gyrodynamics and nonlinear dynamics. He received from the Brazilian Government the Medal of Scientific Merit (2002), the Brazilian Mechanical Engineering prize from the ABCM society (2007) and was invited to be permanent member of the National Academy of Engineering (2008).
Prof. Weber advised 50 Master and Doctor Students, published around 290 papers in journals and international proceedings. Most part of these works formulates the mathematical description of the dynamics of a mechanical system, elaborates a numerical solution and validates the results with experiments that describe the system or some specific phenomena.
3. Subhash C. Sinha
http://www.eng.auburn.edu/users/sinhasc/
Alumni Professor and Director, Nonlinear Systems Research Laboratory
Editor, ASME Journal of Computational and Nonlinear Dynamics
Department of Mechanical Engineering
270 Ross Hall
Auburn University
Auburn, Alabama 36849
Tittle: "Dynamical Systems with Periodic Coefficients: Analysis and Control"
Dr. Subhash C. Sinha currently holds the rank of an Alumni Professor in the Department of Mechanical Engineering at Auburn University,
AL, USA. After receiving his Ph. D. degree from Wayne State University (Detroit, Michigan) in 1977, he has served on the faculty of
Kansas State University, State University of New York-Binghamton, and Auburn University where he has been for the past 21 years.
During 2002-2005, Dr. Sinha had the honor of serving as a Philpott-WestPoint Stevens Distinguished Professor in the College of
Engineering. He has also held a Senior Research Engineer position at Ford Motor Company and a Visiting Professor appointment at INSA,
Lyon, France. He spent his sabbatical year (2007-2008) as a Fulbright Scholar at the University of Mauritius in Mauritius.
For over 25 years, Professor Sinha has been developing new innovative techniques for the dynamic analysis of parametrically excited
systems, such as slider-crank mechanisms, structures subjected to in-plane dynamic loads, helicopter blades, rotor bearing systems,
and satellites to name a few. The developments constitute a new set of analytical, symbolic and numerical tools that are currently
being employed by researchers around the world for the analysis and control of nonlinear periodic and chaotic systems/ structures,
and bio-dynamical systems. His research has been supported by NSF, ARO, AFOSR, NASA, NRC and private industries. Professor Sinha
has supervised several graduate students and Post Doctoral Fellows; many of those hold faculty positions at major universities in
Taiwan, India, Canada and United States. Professor Sinha has authored/coauthored nearly 200 refereed journal articles, conference
publications, book chapters, presentations and editorials. Currently, he serves as the Founding Editor for the ASME Journal of
Computational and Nonlinear Dynamics. He is also a member of the editorial boards of seven other refereed international journals.
Professor Sinha has received numerous awards for his exemplary service to the ASME. He has served as chairs of three ASME technical
committees, the chair of the Design Engineering Division, and chairs of two International ASME Design. Eng. Tech. Conferences (IDETC).
Professor Sinha is the recipient of the N. O. Myklestad Award, given by the ASME in recognition of a major innovative contribution to
vibration engineering. He is a Fellow of ASME (The American Society of Mech. Engineers) and an Associate Fellow of AIAA
(The American Institute of Aeronautics and Astronautics).
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