Now showing items 1-16 of 16

  • Biological invasion in soil: complex network analysis 

    Perez-Reche, Francisco J.; Taraskin, Sergei N.; Neri, F. M.; Gilligan, Christopher A.; Costa, Luciano da F.; Viana, M. P.; Otten, Wilfred; Grinev, Dmitri V. (Institute of Electrical and Electronics Engineers, 2009-07)
    A network model for soil pore space is developed and applied to the analysis of biological invasion of microorganisms in soil. The model was parameterized for two soil samples with different compaction (loosely and densely ...
  • Complexity and anisotropy in host morphology make populations less susceptible to epidemic outbreaks 

    Perez-Reche, Francisco J.; Taraskin, Sergei N.; Costa, Luciano da F.; Neri, Franco M.; Gilligan, Christopher A. (The Royal Society, 2010-07)
    One of the challenges in epidemiology is to account for the complex morphological structure of hosts such as plant roots, crop fields, farms, cells, animal habitats and social networks, when the transmission of infection ...
  • Driving-induced crossover: from classical criticality to self-organized criticality 

    Perez-Reche, Francisco J.; Truskinovsky, Lev; Zanzotto, Giovanni (American Physical Society, 2008-12)
    We propose a spin model with quenched disorder which exhibits in slow driving two drastically different types of critical nonequilibrium steady states. One of them corresponds to classical criticality requiring fine-tuning ...
  • Epidemics in networks of spatially correlated three-dimensional root-branching structures 

    Handford, Thomas P.; Perez-Reche, Francisco J.; Taraskin, Sergei N.; Costa, Luciano da F.; Miazaki, Mauro; Neri, Franco M.; Gilligan, Christopher A. (The Royal Society, 2011-03)
    Using digitized images of the three-dimensional, branching structures for root systems of bean seedlings, together with analytical and numerical methods that map a common susceptible–infected–recovered (‘SIR’) epidemiological ...
  • Exact spin–spin correlation function for the zero-temperature random-field Ising model 

    Handford, P.; Perez-Reche, Francisco J.; Taraskin, Sergei N. (Institute of Physics, 2012-01)
    An exact expression for the spin–spin correlation function is derived for the zero-temperature random-field Ising model defined on a Bethe lattice of arbitrary coordination number. The correlation length describing dynamic ...
  • Heterogeneity in susceptible–infected–removed (SIR) epidemics on lattices 

    Neri, Franco M.; Perez-Reche, Francisco J.; Taraskin, Sergei N.; Gilligan, Christopher A. (The Royal Society, 2011-02)
    The percolation paradigm is widely used in spatially explicit epidemic models where disease spreads between neighbouring hosts. It has been successful in identifying epidemic thresholds for invasion, separating non-invasive ...
  • Martensitic transformations: from continuum mechanics to spin models and automata 

    Perez-Reche, Francisco J.; Truskinovsky, Lev; Zanzotto, Giovanni (Springer Verlag, 2009-06)
    We present a new methodology for the systematic reduction of a continuum theory of martensitic transformations to a spin system whose dynamics can be described by an automaton. Our prototypical model reproduces most of ...
  • Modelling fungal colonies and communities: challenges and opportunities 

    Falconer, Ruth E.; Bown, James L.; McAdam, Eilidh V.; Perez-Reche, Paco; Sampson, Adam T.; van den Bulcke, Jan; White, Nia A.; Perez-Reche, Francisco J. (International Mycological Association, 2010-12)
    This contribution, based on a Special Interest Group session held during IMC9, focuses on physiological based models of filamentous fungal colony growth and interactions. Fungi are known to be an important component of ...
  • Numerical approach to metastable states in the zero-temperature random-field Ising model 

    Perez-Reche, Francisco J.; Rosinberg, Martin L.; Tarjus, Gilles (American Physical Society, 2008-02)
    We study numerically the number of single-spin-flip stable states in the T=0 random field Ising model on random regular graphs of connectivity z=2 and z=4 and on the cubic lattice. The annealed and quenched complexities ...
  • Prominent effect of soil network heterogeneity on microbial invasion 

    Perez-Reche, Francisco J.; Taraskin, Sergei N.; Otten, Wilfred; Viana, M. P.; Costa, Luciano da F.; Gilligan, Christopher A. (American Physical Society, 2012)
    Using a network representation for real soil samples and mathematical models for microbial spread, we show that the structural heterogeneity of the soil habitat may have a very significant influence on the size of microbial ...
  • Resilience of soil to biological invasion: analysis of spread on networks 

    Otten, Wilfred; Grinev, Dmitri V.; Perez-Reche, Francisco J.; Neri, Franco; Costa, Luciano da F.; Biana, Marcel; Gilligan, Christopher A.; Taraskin, Sergei N. (International Union of Soil Sciences, 2010-08)
    A network model for soil pore volume is presented and applied to the analysis of biological invasion of microorganisms. The pore geometry of two soils with a relatively high or low bulk density were quantified with the ...
  • Reverse engineering of biochar 

    Morales, Veronica L.; Perez-Reche, Francisco J.; Hapca, Simona M.; Hanley, Kelly L.; Lehmann, Johannes; Zhang, Wei (Elsevier, 2015-02-18)
    This study underpins quantitative relationships that account for the combined effects that starting biomass and peak pyrolysis temperature have on physico-chemical properties of biochar. Meta-data was assembled from published ...
  • Stable, metastable and unstable states in the mean-field random-field Ising model at T = 0 

    Rosinberg, Martin L.; Tarjus, Gilles; Perez-Reche, Francisco J. (Institute of Physics, 2008-10)
    We compute the probability distribution of the number of metastable states at a given applied field in the mean-field random-field Ising model at T = 0. Remarkably, there is a non-zero probability in the thermodynamic limit ...
  • Surfactant-mediated control of colloid pattern assembly and attachment strength in evaporating droplets 

    Morales, Veronica L.; Parlange, Jean-Yves; Wu, Mingming; Perez-Reche, Francisco J.; Zhang, Wei; Sang, Wenjing; Steenhuis, Tammo S. (American Chemical Society, 2013)
    This study demonstrates that the pattern assembly and attachment strength of colloids in an evaporating sessile droplet resting on a smooth substrate can be controlled by adding nonionic solutes (surfactant) to the solution. ...
  • Synergy in spreading processes: from exploitative to explorative foraging strategies 

    Perez-Reche, Francisco J.; Ludlam, Jonathan J.; Taraskin, Sergei N.; Gilligan, Christopher A. (American Physical Society, 2011-05)
    An epidemiological model which incorporates synergistic effects that allow the infectivity and/or susceptibility of hosts to be dependent on the number of infected neighbours is proposed. Constructive synergy induces an ...
  • The T = 0 random-field Ising model on a Bethe lattice with large coordination number: hysteresis and metastable states 

    Rosinberg, Martin L.; Tarjus, Gilles; Perez-Reche, Francisco J. (Institute of Physics, 2009-03)
    In order to elucidate the relationship between rate-independent hysteresis and metastability in disordered systems driven by an external field, we study the Gaussian RFIM at T = 0 on regular random graphs (Bethe lattice) ...