Digest of the Non Linear Science Network, Volume 07, Number 12 July 1, 2007 Editor: Angel Jorba Topics: Workshop on time integration of evolution problems in Innsbruck Workshop on Functional and Delay Differential Eqns in Canada Fellowship on social systems and opinions dynamics in Namur, Belgium Postoctoral position in Mathematical Modeling in Waterloo, Canada Contents, Discrete and Continuous Dynamical Systems - A 19:1 Contents, Networks and Heterogeneous Media 2:3 Call for Papers: IJMS Submissions to nls-net must be addressed to: Comments and suggestions are also welcome. General information about nls-net can be found at: http://www.maia.ub.es/cgi-bin/mailman/listinfo/nls-net/ This is a service created and maintained in collaboration with the American Institute of Mathematical Sciences (AIMS) http://www.aimsciences.org/ ------ Subject: Workshop on time integration of evolution problems in Innsbruck From: "Alexander Ostermann" Date: Thu, 14 Jun 2007 17:29:54 +0200 Workshop: Time integration of evolution problems September 12-15, 2007 Innsbruck, Austria Second call for papers In collaboration with the numerical analysis groups of the Universities of Trieste and Udine, the Department of Mathematics of the University of Innsbruck organizes the fourth workshop in series on numerical analysis and scientific computing. This year, the workshop is devoted to the time integration of evolution problems placing emphasis on the time discretisation of PDEs. Our intention is to provide a platform for exchanging new ideas and results in the development of numerical methods for evolution equations. We try to cover both, theoretical and practical aspects, and we want to bring together numerical analysts working in the field as well as PhD students who want to start in this area. If you are interested in attending the workshop, please send an e-mail to one of the local organizers (alexander.ostermann@uibk.ac.at or mechthild.thalhammer@uibk.ac.at). More information, including a tentative list of participants, is available at http://techmath.uibk.ac.at/numbau/alex/events/conference2007.html The deadline for submitting an abstract is July 30, 2007. Please note that the number of participants is limited. Organizers: Alexander Ostermann, Mechthild Thalhammer (Innsbruck) Alfredo Bellen (Trieste) ------ Subject: Workshop on Functional and Delay Differential Eqns in Canada From: Tony Humphries Date: Wed, 13 Jun 2007 15:29:56 -0400 First Announcement and Call for Participants Joint AARMS-CRM Workshop on Recent Advances in Functional and Delay Differential Equations Dalhousie University, Halifax, Nova Scotia, Canada 1-5 November 2007 Sponsored by AARMS, CRM, MITACS, NSERC AND MATHEON Conference URL: http://www.crm.math.ca/AARMS07/index_e.shtml Organizers: J. Appleby (Dublin City), H. Brunner (Memorial), A.R. Humphries (McGill), D.E. Pelinovsky (McMaster) Local Organisers P. Keast (Dalhousie), P. Muir (St Mary's) Plenary Speakers Nicola Guglielmi (L'Aquila), Tibor Krisztin (Szeged), Gerard Iooss (Nice), Sjoerd Verduyn Lunel (Leiden), Cesar Palencia (Valladolid), Jianhong Wu (York, Canada) Delay differential equations arise in many applications, and in the case of constant delays solutions give rise to semi-flows on function spaces, and a fairly mature theory of such problems as infinite dimensional dynamical systems has now been developed. However, models in physical and biological applications are increasingly encompassing features which do not fit this theory, often having non-constant and state-dependent delays. Mixed type differential equations with both advanced and retarded arguments also arise, for example as the defining equations for travelling waves in nonlinear lattices. Volterra functional (integral and integro-differential) equations with variable and state-dependent delays, including equations of ??integral-algebraic?? type, are also used with increasing frequency. The theory of such problems is still not complete, though significant progress has been made in recent years. Large gaps also exist in the numerical analysis and computational solution of such functional equations. This workshop will provide a wide perspective on current research and open problems, including theory, applications and numerical analysis of these equations. Recent advances across the field of DDEs will be covered, with particular concentrations in non-constant and state-dependent delay equations, advance-delay differential equations and Volterra functional equations, including problems with ??differential-algebraic?? structure. The workshop will bring together specialists in analysis and numerical computations of the functional and delay equations, with particular applications in biological problems and traveling waves in nonlinear lattices. ------ Subject: Fellowship on social systems and opinions dynamics in Namur, Belgium From: timoteo carletti Date: Mon, 18 Jun 2007 14:38:56 +0200 *Fonds special de recherche FSR* *MultiAgents models: applications to social networks* A 1+1 year young researcher grant is available starting from September 2007 at the Department of mathematics University of Namur (Belgium), to work on the project ``/Multi-Agents models: applications to social networks/''. The grant is reserved to candidates that already have a 4 (or 5) year's graduate degree before the beginning of the collaboration but without a PhD. The starting date can be agreed with the candidate, but it cannot be after December the 1st . English and/or French speaking is required. Encouraging equal opportunities, we encourage both men and women with relevant qualifications to apply. Interested candidates can contact Professor Timoteo Carletti (timoteo.carletti@fundp.ac.be) and send their application (CV + recommendation letter + any other useful material) to timoteo.carletti@fundp.ac.be before August the 1^st . Short introduction of the project: Nowadays agents' models are widely applied to describe-analyse complex systems as different as animal swarms (ants, fishes, birds), social systems (formation of opinions), economics (expectancy formation), biological systems (evolution of populations), and many others. The common key idea behind these models is that they exhibit a two levels description: a /global one /(macro level) as a whole system and a second /local behaviour /(micro level), each agent obeying to some "personal" rules. The main task is to achieve a description of the macro level as emerging from the micro rules. Following the research activities of the dynamical systems team of our Department, we plan to investigate social systems aiming to describe some relevant properties (for instance: emergence of leadership, role of extremist), but we also plan to develop some theoretical "universal" tools, whose application could be straightforward to others systems. Our aim is to introduce and study simple abstract models to emphasize the emergence of universal features, in this way the results will be robust and widely applicable. These systems are naturally at the intersection of many different domains, and we will try to keep as much as possible from this closeness, by interacting directly with researchers from various domains: mathematics, physics, sociology, economy, each one introducing and sharing his own point of view. Keywords: Multi-Agents Systems, complex systems, evolution, emergent properties, opinion dynamics, social networks. Timoteo Carletti ------ Subject: Postoctoral position in Mathematical Modeling in Waterloo, Canada From: Roderick Melnik Date: Tue, 26 Jun 2007 02:58:48 -0400 Applications are invited for a Postdoctoral Position in Mathematical Modeling at the M2NeT Lab, Wilfrid Laurier University, Waterloo, Canada. Further information about the position and how to apply can be found at the following website: http://www.mmcs.wlu.ca/2007-2008-openings-m2netlab.html Informal inquiries are welcome, contact Professor Roderick Melnik at rmelnik@wlu.ca The position is available from the Fall semester 2007. ------ Subject: Contents, Discrete and Continuous Dynamical Systems - A 19:1 From: Zemin Zeng Date: Tue, 12 Jun 2007 12:30:28 -0400 Discrete and Continuous Dynamical Systems - Series A (DCDS-A) Volume: 19, Number: 1, September 2007 http://www.aimsciences.org/journals/dcdsA/online.jsp Table of Contents: Juan Luis Vazquez Pages : 1 - 35 Finite-time blow-down in the evolution of point masses by planar logarithmic diffusion Daniela De Silva, Natavsa Pavlovic, Gigliola Staffilani and Nikolaos Tzirakis Pages : 37 - 65 Global well-posedness for a periodic nonlinear Schrodinger equation in 1D and 2D Aubin Arroyo and Enrique R. Pujals Pages : 67 - 87 Dynamical properties of singular-hyperbolic attractors Nicolas Bedaride Pages : 89 - 102 Entropy of polyhedral billiard Wei Lin, Jianhong Wu and Guanrong Chen Pages : 103 - 119 Generalized snap-back repeller and semi-conjugacy to shift operators of piecewise continuous transformations M. Guru Prem Prasad and Tarakanta Nayak Pages : 121 - 138 Dynamics of { \lambda tanh(e^z): \lambda \in R \{ 0 } } Anca Radulescu Pages : 139 - 175 The connected Isentropes conjecture in a space of quartic polynomials T. Caraballo, P. Kloeden and P. Marin-Rubio Pages : 177 - 196 Numerical and finite delay approximations of attractors for logistic differential-integral equations with infinite delay D. Motreanu, V. V. Motreanu and N. S. Papageorgiou Pages : 197 - 210 Two nontrivial solutions for periodic systems with indefinite linear part Yinbin Deng, Qi Gao and Dandan Zhang Pages : 211 - 233 Nodal solutions for Laplace equations with critical Sobolev and Hardy exponents on R^N ------ Subject: Contents, Networks and Heterogeneous Media 2:3 From: Zemin Zeng Date: Fri, 29 Jun 2007 13:55:15 -0400 Networks and Heterogeneous Media (NHM) Volume: 2, Number: 3, September 2007 http://www.aimsciences.org/journals/NHM/nhm_online.jsp Table of Contents: Shijin Deng, Weike Wang and Shih-hsien Yu Pages : 383 - 395 Pointwise convergence to a Maxwellian for a Broadwell model with a supersonic boundary Andro Mikelic, Giovanna Guidoboni and Sunvcica Vcanic Pages : 397 - 423 Fluid-structure interaction in a pre-stressed tube with thick elastic walls I: the stationary Stokes problem Serge Nicaise and Julie Valein Pages : 425 - 479 Stabilization of the wave equation on 1-d networks with a delay term in the nodal feedbacks Michael Herty, Lorenzo Pareschi and Mohammed Seaid Pages : 481 - 496 Enskog-like discrete velocity models for vehicular traffic flow Alessia Marigo Pages : 497 - 528 Equilibria for data networks Mohamed Belhadj, Eric Cances, Jean-Frederic Gerbeau and Andro Mikelic Pages : 529 - 550 Homogenization approach to filtration through a fibrous medium Andrea Braides, Margherita Solci and Enrico Vitali Pages : 551 - 567 A derivation of linear elastic energies from pair-interaction atomistic systems ------ Subject: Call for Papers: IJMS From: "Int. J. Tomogr. Stat." Date: Fri, 22 Jun 2007 23:37:34 -0700 (PDT) International Journal of Mathematics and Statistics ISSN 0973-8347 http://www.isder.ceser.res.in/ijms.html Call for Papers Papers are invited for the International Journal of Mathematics & Statistics (IJMS). The IJMS is a peer-reviewed journal, published in Spring and Autumn i.e. two times a year. The IJMS publishes refereed, well-written original research articles, and studies that describe the latest research and developments in the area of applied mathematics and statistics. This is a broad-based journal covering all branches of mathematics and statistics. It's also published interdisciplinary research. Manuscripts can be sent to the IJMS via e-mail to Editor-in-Chief. In accordance with usual practice, papers previously published and are under consideration for publication elsewhere cannot be accepted, and authors must agree not to publish accepted papers elsewhere without the prior permission of IJMS. Detailed instructions on how to prepare your manuscript are available at "Instructions for Author".