Part I: Joint CRM-Imperial College Workshop in Complex Systems -- Foreword -- Mesoscopic models for the overstretching transition of DNA -- Criticality on rainfall: statistical observational constraints for the onset of strong convection modelling -- Testing universality and goodness-of-fit test of power-law distributions -- Stability of strength and weight distributions for time-evolving word co-occurrence networks -- Single infection epidemic spreading model -- Niche dimension as an emergent property of food-web structure -- Modelling the population dynamics in a cell culture at two different scales -- Assessing the significance and predicting the effects of knockout cascades in metabolic networks -- Stochastic amplification in neural networks -- Evolutionary dynamics of the genotype-phenotype map -- Spatio-temporal patterns in a large-scale discrete-time neuron network -- A cavity method approach to DNA stretching -- Idiosyncrasy as an explanation for power laws in nature -- Symmetric division model of cell differentiation systems -- Free energy landscape analysis of mesoscopic model for finding DNA-protein binding sites -- Are first order phase transitions possible in disordered low-dimensional non-equilibrium systems?- Labquakes: acoustic emission during the compression of porous materials -- Part II: Emergence, Spread and Control of Infectious Diseases -- Foreword -- Global properties of a core group model for sexually transmitted infections -- Incorporating landscape heterogeneities in the spread of an epidemic in wildlife -- The phenomenon of apparent disappearance in the marine bacteriophage dynamics -- Viral RNA replication modes: evolutionary and dynamical implications -- System order reduction methods with application to a bacteriophages dynamics model -- Viruses and their role in the ocean: bacteriophages and bacteria interactions.