Speaker
Ivan Junier

Description Molecular biology experiments have revealed a wealth of specific DNA organizations that are related to fundamental biological processes (transcription, replication, and genetic regulation). These organizations cover all scales, from the base-pair level to the cellular level. The role of large-scale organizations on the proper functioning of cells, as well as the mechanisms that are responsible for their emergence, are yet to be understood. In this regard, polymer physics appears to be a useful approach, not to say necessary, which can provide deep insights into the physical mechanisms of the phenomena. In this talk, I will will present three systems in more detail: i) the phenomenon of transcription factories, ii) the control of transcriptional activity in the beta-globin locus, and iii) the problem of chromosome segregation during bacterial replication.

Description

Bringing together leading researchers, practitioners, and teachers in network science (including analysts, modelers, visualizers, and others), NetSci fosters interdisciplinary communication and collaboration. The conference focuses on novel directions in networks research within the biological and environmental sciences, computer and information sciences, social sciences, finance and business.

Organizers
Brian Uzzi, Northwestern University, Noshir Contractor, Northwestern University, Albert-László Barabási, Northeastern University and Harvard Medical School

Speaker
Gaspar Orriols

Description Contrary to common beliefs, the quasiperiodic motion does not represent the exclusive way for combining oscillations in dissipative nonlinear systems. There is another kind of mixing mechanism based on the intertwine of the oscillatory motions emerged through Hopf bifurcations of one or more fixed points, and it develops in a rather robust way, without requiring the creation of limit sets of successively higher dimension. Under proper conditions, the mixing becomes apparent in the time evolution of the attractor in the form of intermittent bursts of the different oscillation modes, combined ones over the others according to the scale of frequencies. Experimental and numerical examples can be seen in [1] and a generalization to richer nonlinear vector fields establishing a dynamical scenario with extraordinary oscillatory possibilities is reported in [2], where the relation to the oscillatory behaviors of turbulent fluids and living brains is discussed and where, by considering the scenario as a dynamic substrate underlying generic aspects of both the functioning and the genesis of complexity in a supposedly deterministic world, a theoretical framework covering the evolutionary development of structural transformations in the time evolution of that world is built up. In the talk we will try to illustrate how the oscillatory scenario could provide a robust basis for sustaining the ordered functioning of complex systems. [1] J. Rius et al., Phys. Rev. E 62, 333 (2000); Chaos 10, 760 (2000). [2] R. Herrero et al., Physica D, http://dx.doi.org/10.1016/j.physd.2012.05.001 or http://arxiv.org/abs/0911.2157.

Speaker
Antonio Turiel

Description Almost 30 years ago Giorgio Parisi and Uriel Frisch's seminal paper settled the basis for the Multifractal theory of turbulent flows. The anomalous scaling exponents, already observed in the pioneering works by Andréi Kolmogorov, were for the first time explained in terms of a hierarchy of multiple, coordinated fractal sets, each one characterized by a different value of the local dissipation. This work inaugurated a new field for the study and interpretation of turbulent fluids in terms of significant, statistically sound quantities: the global scaling exponents. However, this standard approach to multifractality (Canonical Multifractal Formalism, CMF) is very demanding in data, and sensitive results can only be obtained after carefully statistical analysis. Most recently, a new approach to multifractal systems has been issued: the so-called Microcanonical Multifractal Formalism (MMF). In opposition to CMF, MMF allows for a geometrical interpretation of each realization of the fluid. The descriptive variables in MMF are singularity exponents, which by opposition to global scaling exponents are local. The main difficulty with MMF is to devise an appropriate scheme for deriving singularity exponents. In this talk we will present the general theory of MMF, with an extensive discussion of the concepts of universality and information hierarchy. We will present the wide range of applications of MMF, which covers from the study of the dynamics of oceans from the analysis of remote sensing images to image compression of images, the analysis and forecast of stock market series, the inference of missing data and the denoising of complex images.

Speaker
Antonio Turiel

Description Programa: 10:00 - 10:50 Álvaro Corral, Centre de Recerca Matemàtica "Branching processes, criticality and self-organization in natural hazards" 11:00 - 11:50 Antonio Turiel, Institut de Ciències del Mar, CSIC "Microcanonical multifractal formalism: theory and applications" Coffee Break 12:30 - 13:20 Gaspar Orriols, Departament de Física, UAB "About the oscillatory possibilities of the dynamical systems" Chairman: Antoni Guillamon, UPC and CRM