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Paper de-inking sludge was used as an organic amendment for revegetating an abandoned sandpit in QueÂ bec, Canada. In situ patterns of sludge decomposition and of total nitrogen and phosphorus dynamics were characterized in a litter bag study. In a one-time operation, sludge was applied at a rate of 0 or 105 Mg dry matter haÿ1, along with N at 3, 6 or 9 kg… (More)

- A de Candia, E Del Gado, A Fierro, N Sator, M Tarzia, A Coniglio
- Physical review. E, Statistical, nonlinear, and…
- 2006

In colloidal suspensions, at low volume fraction and temperature, dynamical arrest occurs via the growth of elongated structures that aggregate to form a connected network at gelation. Here we show that, in the region of parameter space where gelation occurs, the stable thermodynamical phase is a crystalline columnar one. Near and above the gelation… (More)

- A Fierro, A Liccardo
- The European physical journal. E, Soft matter
- 2011

We construct a very simple epidemic model for influenza spreading in an age-class-distributed population, by coupling a lattice gas model for the population dynamics with a SIR stochastic model for susceptible, infected and removed/immune individuals. We use as a test case the age-distributed Italian epidemiological data for the novel influenza A(H1N1). The… (More)

- M Tarzia, A De Candia, A Fierro, M Nicodemi, A Coniglio
- 2004

– In the framework of schematic hard spheres lattice models for granular media we investigate the phenomenon of the " jamming transition ". In particular, using Edwards' approach, by analytical calculations at a mean field level, we derive the system phase diagram and show that " jamming " corresponds to a phase transition from a " fluid " to a " glassy "… (More)

- A Coniglio, A Fierro, M Nicodemi
- The European physical journal. E, Soft matter
- 2002

The present paper develops a Statistical Mechanics approach to the inherent states of glassy systems and granular materials by following the original ideas proposed by Edwards for granular media. We consider three lattice models (a diluted spin glass, a system of hard spheres under gravity and a hard-spheres binary mixture under gravity) introduced to… (More)

- A Fierro, M Nicodemi, M Tarzia, A de Candia, A Coniglio
- Physical review. E, Statistical, nonlinear, and…
- 2005

In order to study analytically the nature of the jamming transition in granular material, we have considered a cavity method mean-field theory, in the framework of a statistical mechanics approach, based on Edwards' original idea. For simplicity, we have applied the theory to a lattice model, and a transition with exactly the same nature of the glass… (More)

- Antonella Liccardo, Annalisa Fierro
- PloS one
- 2013

We construct a stochastic SIR model for influenza spreading on a D-dimensional lattice, which represents the dynamic contact network of individuals. An age distributed population is placed on the lattice and moves on it. The displacement from a site to a nearest neighbor empty site, allows individuals to change the number and identities of their contacts.… (More)

- A Fierro, T Abete, A de Candia, E Del Gado, A Coniglio
- Journal of physics. Condensed matter : an…
- 2009

We describe the sol-gel transition by introducing an order parameter, defined as the average of local variables, and its fluctuations. It can be shown that these quantities are related to percolation quantities, but in principle they can be measured without resorting to connectivity properties. In this framework it appears that the dynamical transition… (More)

- Annalisa Fierro, Mario Nicodemi, Antonio Coniglio
- Physical review. E, Statistical, nonlinear, and…
- 2002

We discuss a statistical mechanics approach in the manner of Edwards to the "inherent states" (defined as the stable configurations in the potential energy landscape) of glassy systems and granular materials. We show that at stationarity the inherent states are distributed according a generalized Gibbs measure obtained assuming the validity of the principle… (More)

- T Abete, A de Candia, E Del Gado, A Fierro, A Coniglio
- Physical review letters
- 2007

We study the structure and the dynamics in the formation of irreversible gels by means of molecular dynamics simulation of a model system where the gelation transition is due to the random percolation of permanent bonds between neighboring particles. We analyze the heterogeneities of the dynamics in terms of the fluctuations of the self-intermediate… (More)