Now showing items 1-15 of 15

    • Analysis of self-overlap reveals trade-offs in plankton swimming trajectories 

      Bianco, Giuseppe; Mariani, Patrizio; Visser, André W.; Mazzocchi, Maria Grazia; Pigolotti, Simone (2014-07-06)
      Article
      Restricted access - publisher's policy
      Movement is a fundamental behaviour of organisms that not only brings about beneficial encounters with resources and mates, but also at the same time exposes the organism to dangerous encounters with predators. The movement ...
    • Coarse-grained probabilistic automata mimicking chaotic systems 

      Falcioni, Massimo; Vulpiani, Angelo; Mantica, Giorgio; Pigolotti, Simone (2003-07-24)
      Article
      Open Access
      Discretization of phase space usually nullifies chaos in dynamical systems. We show that if randomness is associated with discretization dynamical chaos may survive and be indistinguishable from that of the original chaotic ...
    • Competition between fast- and slow-diffusing species in non-homogeneous environments 

      Pigolotti, Simone; Benzi, Roberto (2016-04-21)
      Article
      Open Access
      We study an individual-based model in which two spatially distributed species, characterized by different diffusivities, compete for resources. We consider three different ecological settings. In the first, diffusing faster ...
    • Equilibrium strategy and population-size effects in lowest unique bid auctions 

      Pigolotti, Simone; Bernhardsson, Sebastian; Juul, Jeep; Galster, Gorm; Vivo, Pierpaolo (2012-02-22)
      Article
      Open Access
      In lowest unique bid auctions, N players bid for an item. The winner is whoever places the lowest bid, provided that it is also unique. We use a grand canonical approach to derive an analytical expression for the equilibrium ...
    • Inherent directionality explains the lack of feedback loops in empirical networks 

      Dominguez Garcia, Virginia; Pigolotti, Simone; Muñoz Martínez, Miguel Ángel (MACMILLAN PUBLISHERS LIMITED, 2014-12-22)
      Article
      Open Access
      We explore the hypothesis that the relative abundance of feedback loops in many empirical complex networks is severely reduced owing to the presence of an inherent global directionality. Aimed at quantifying this idea, we ...
    • Limit-cycle oscillations and stable patterns in repressor lattices 

      Chakraborty, Sudipta; Jensen, M.H.; Krishna, Sandeep; Mengel Pers, B.; Pigolotti, Simone; Sekara, V.; Semsey, S. (2012-09-07)
      Article
      Open Access
      As a model for cell-to-cell communication in biological tissues, we construct repressor lattices by repeating a regulatory three-node motif on a hexagonal structure. Local interactions can be unidirectional, where a node ...
    • Numerical and experimental study of the effects of noise on the permutation entropy 

      Quintero Quiroz, Carlos Alberto; Pigolotti, Simone; Torrent Serra, Maria del Carmen; Masoller Alonso, Cristina (2015-09-02)
      Article
      Open Access
      We analyze the effects of noise on the permutation entropy of dynamical systems. We take as numerical examples the logistic map and the Rössler system. Upon varying the noise strength we find a transition from an ...
    • Particle algorithms for population dynamics in flows 

      Perlekar, P.; Benzi, R.; Pigolotti, Simone; Toschi, F. (2011)
      Article
      Open Access
      We present and discuss particle based algorithms to numerically study the dynamics of population subjected to an advecting flow condition. We discuss few possible variants of the algorithms and compare them in a model ...
    • Protocols for copying and proofreading in template-assisted polymerization 

      Pigolotti, Simone; Sartori, Pablo (2016-03)
      Article
      Open Access
      We discuss how information encoded in a template polymer can be stochastically copied into a copy polymer. We consider four different stochastic copy protocols of increasing complexity, inspired by building blocks of the ...
    • Selective advantage of diffusing faster 

      Pigolotti, Simone; Benzi, R. (2014-05-09)
      Article
      Open Access
      We study a stochastic spatial model of biological competition in which two species have the same birth and death rates, but different diffusion constants. In the absence of this difference, the model can be considered as ...
    • Stochastic competition between two populations in space 

      Pigolotti, Simone; Benzi, Roberto; Jensen, Mogens H.; Perlekar, Prasad; Toschi, Federico (2014-06-10)
      Part of book or chapter of book
      Restricted access - publisher's policy
    • Stochastic model for the species abundance problem 

      Pigolotti, Simone; Flammini, Alessandro; Maritan, Amos (2004-05-30)
      Article
      Open Access
      We propose a model based on coupled multiplicative stochastic processes to understand the dynamics of competing species in an ecosystem. This process can be conveniently described by a Fokker-Planck equation. We provide ...
    • Stochasticity enhances the gaining of bet-hedging strategies in contact-process-like dynamics 

      Hidalgo, Juan J.; Pigolotti, Simone; Muñoz Martínez, Miguel Ángel (2015-03-10)
      Article
      Open Access
    • Thermodynamics of error correction 

      Sartori, Pablo; Pigolotti, Simone (2015-12-10)
      Article
      Open Access
      Information processing at the molecular scale is limited by thermal fluctuations. This can cause undesired consequences in copying information since thermal noise can lead to errors that can compromise the functionality ...
    • What ecological factors shape species-area curves in neutral models? 

      Cencini, Massimo; Pigolotti, Simone; Muñoz Messineo, Miguel Ángel (2012-06-04)
      Article
      Open Access
      Understanding factors that shape biodiversity and species coexistence across scales is of utmost importance in ecology, both theoretically and for conservation policies. Species-area relationships (SARs), measuring how the ...