- 1979 - 1980 Fellowship Royal Society-Accademia dei Lincei. Department of Theoretical Chemistry, Oxford University, Oxford, UK.

- 1981 Fellowship Della Riccia.

- 1981 - 1983 Post-Doc, Department of Physics, Freie University, Berlin, Germany.

- January-June 1983 Visiting scientist, H.H. Wills Physics Laboratory University of Bristol, UK.

- 1984-1986, Post-Doc, H.H. Wills Physics Laboratory University of Bristol, UK.

- January-June 1987 Postdoc, University of Rio Pedras, Departamento de Fisica, (Portorico, USA).

- June-December 1987, Visiting Scientist, Dept. of Chemical Engineering, Cornell University, (Ithaca, NY, USA).

- 1988 Professore a contratto University of Tor Vergata, Roma. September 1988-March 1990 Ricercatore, Istituto Nazionale di Fisica Nucleare (Articolo 36), APE Group, INFN, Rome.

- April 1990-2000 Ricercatore Universitario Confermato, Condensed matter, University of Camerino, Italy.

- February 2001-present Professore Associato Confermato di Struttura della materia, University of Camerino, Italy.

**Research Interests**

- Granular Media
- Phase transitions and Critical Phenomena.
- Capillary Condensation and Porous media.
- Complex fluids and Colloidal Systems.
- Density functional methods for classical fluids with application to dynamic properties.

**Publications**

- Author of approximately 100 scientific publications.

**Organization of Conferences**

I have co-organized 3 Meetings on Statistical Mechanics at Camerino and a Workshop on Granular System in Pisa in 1998. I also coorganized the Conferenza Nazionale di Meccanica Statistica di Parma Italy from 1993 to 1997.

Member of the Scientific Committee of the INFM Conference held in Fai della Paganella and now in Levico Terme.

* RESEARCH*

Statistical Mechanics has become in the last decades the standard tool to study problems once considered to be out of the reach and the scopes of Physics. It has been in fact applied to the study of the complex behavior of various kinds of systems of areas such as biological and sociological sciences, finance, economy, theory of decisions, networks. In particular several disciplines connected with Engineering are now attracting more and more the interest of physicsts. Granular matter is a remarkable example of these new disciplines. The problem of understanding granular materials is widely recognized as one of the main problems of engineering and industry. A brief list of typical "granular" products comprehends: grains, powders, sands, pills, seeds and similar particulate materials. More generally, granular materials are a very large set of substances used in the industry and in the everyday life: ceramics, fertilizers, cosmetics, food products, paper, conductor pastes, resins, electronics, polymers, suspensions, solid chemicals, construction materials and so on. The international economic impact of particle processing is substantial. The value added by manufacture that involves particulate has been estimated to be a minimum of 80/100 billion/year, which is of the order of the US trade deficit with Japan. The US Dept. of Commerce has estimated the total economic impact of particulate products to be one trillion/year. Despite economic impact, however, insufficient attention is paid to difficulties associated with the processing of particles. An improved understanding of micromechanics of granular media requires an interdisciplinary approach involving both physicists and engineers.

Mechanical engineers and geologists have studied Granular Matter for at least two centuries and found several empirical laws describing its behavior. Physicists have joined in more recently and are interested in formulating general laws. For them granular matter is a new type of condensed matter, showing two states: one fluid-like, one solid-like. But there is not yet consensus on the description of these two states. According to P.G. de Gennes Granular matter now is at the level of solid-state physics in 1930.

Granular matter also represents an important paradigm for the study of non-equilibrium stationary states. Due to the dissipative nature of the interactions granular gases have to be considered as open systems and therefore concepts from equilibrium thermodynamics cannot be applied, at least in straightforward way. The project we propose focuses on granular fluids. We intend by granular fluid a large number of particles, whose size is larger than a micron, colliding with one another and losing a little energy in each collision. Below one micron thermal agitation is important and Brownian motion can be observed. Above one micron, thermal agitation is negligible. However,if such a system is shaken to keep it in motion, its dynamics resembles that of fluids, in that the grains move randomly.

One of the key differences between a granular material and a regular fluid is that the grains of the former lose energy with each collision, while the molecules of the latter do not. Even when the inelasticity of the collisions is small, it can give rise to dramatic effects, including the Maxwell Demon effect and the phenomenon of granular clustering. Experiments and molecular dynamics simulations alike show that granular gases in the absence of gravity do not become homogeneous with time, but instead form dense clusters of stationary particles surrounded by a lower density region of more energetic particles. From a particulate point of view, one can explain these clusters by noting that when a particle enters a region of slightly higher density, it has more collisions, loses more energy, and so is less able to leave that region, thus increasing the local density and making it more likely for the next particle to be captured.

**Original papers**

* Statistical mechanics of granular gases in compartmentalized systems
*
Physical Review E **68**, 031306 (2003) .

- Noise Activated Granular Dynamics

Phys. Rev. Lett. 90, 064301 (2003)

pdf

Surface and capillary transitions in an associating binary mixture model

Phys. Rev. E 67, 041502 (2003)

J. M. Romero Enrique, I. Rodriguez Ponce, L. F. Rull
and Umberto Marini Bettolo Marconi

Complex fluid behavior of strongly asymmetric
binary mixtures. Thermodynamic properties
of a generalized Lin-Taylor model.

Molecular Physics 93, 501 (1998). PDF

J. M. Romero Enrique, I. Rodriguez Ponce, L. F. Rull y
Umberto Marini Bettolo Marconi.

Critical exponents in the Lin-Taylor model of asymmetrical
binary mixtures

Molecular Physics, 95 , 571 (1998). PDF

Driven low density granular mixtures

Phys. Rev. E 051304 (2002)

PDF

**3**

Steady-state properties of a mean-field model of driven inelastic mixtures

Phys. Rev. E 66, 011301 (2002)

**5**

Mean-field model of free-cooling inelastic mixtures

Phys. Rev. E 65, 051305 (2002)

Cooling of a lattice granular fluid as an ordering process PDF

Phys. Rev. E 65, 051301 (2002)

- Baldassarri, U. M. B. Marconi, A. Puglisi, and A. Vulpiani

Driven granular gases with gravity

Groove instability in cellular solidification

- Puglisi, V. Loreto, U. Marini Bettolo Marconi, and A. Vulpiani

Kinetic approach to granular gases

Phys. Rev. E 59, 5582-5595 (1999)

- Puglisi, V. Loreto, U. M. B. Marconi, A. Petri, and A. Vulpiani

Clustering and Non-Gaussian Behavior in Granular Matter

U. M. B. Marconi

Interface pinning and slow ordering kinetics on infinitely ramified fractal structures

J. M. Romero-Enrique, I. Rodriguez-Ponce, L. F. Rull,
and U. M. B. Marconi

Comment on Exact Results for the Lower Critical
Solution in the Asymmetric Model of an Interacting Binary Mixture

U. M. B. Marconi, A. Crisanti, and G. Iori

Soluble phase field model

M. Conti, F. Marinozzi, and U. Marini Bettolo Marconi

Diffusion-controlled growth of a solid cylinder into its undercoded melt:
Instabilities and pattern formation studied with the phase-field model

U. M. B. Marconi and A. Petri

Domain growth on self-similar structures

U. M. B. Marconi and A. Crisanti

Growth kinetics in a phase field model with continuous symmetry

- M. Somoza, U. M. B. Marconi, and P. Tarazona

Growth in systems of vesicles and membranes

Phys. Rev. E 53, 5123-5129 (1996)

<! ---------------------------------------->
F. Marinozzi, M. Conti, and U. M. B. Marconi

Phase-field model for dendritic growth in a channel

U. M. B. Marconi and A. Crisanti

Diffusion Limited Growth in Systems with Continuous Symmetry

M. Falcioni, U. M. B. Marconi, P. M. Ginanneschi, and A. Vulpiani

Complexity of the Minimum Energy Configurations

- Crisanti and U. M. B. Marconi

Effective action method for the Langevin equation

U. M. B. Marconi and A. Maritan

Deflated regime for pressurized ring polymers with long-range interactions

M. Falcioni, U. M. B. Marconi, and A. Vulpiani

Ergodic properties of high-dimensional symplectic maps

U. M. B. Marconi and B. L. Gyorffy

Structure of the liquid-vapor interface: A nonperturbative approach to the theory of interfacial fluctuations

Structure of the liquid-vapor interface: A nonperturbative approach to the theory of interfacial fluctuations

U. M. B. Marconi and F. Van Swol

Microscopic model for hysteresis and phase equilibria of fluids
confined between parallel plates

U. M. B. Marconi

Critical adsorption and finite-geometry effects

R. Evans and U. M. B. Marconi

Comment on Simple theory for the critical adsorption of a fluid

Comment on Simple theory for the critical adsorption of a fluid

R. Evans and U. Marini Bettolo Marconi

Capillary condensation versus prewetting

Giulio
Costantini, Fabio Cecconi, and Umberto Marini-Bettolo-Marconi

Transport of a heated granular gas in a washboard potential

J. Chem. Phys. 125, 204711 (2006)
PDF

Umberto Marini Bettolo Marconi and Pedro Tarazona

Nonequilibrium inertial dynamics of colloidal systems

PDF
Nonequilibrium inertial dynamics of colloidal systems

J. Chem. Phys. 124, 164901 (2006)

Umberto Marini-Bettolo-Marconi,
Maurizio Natali, Giulio Costantini, and Fabio Cecconi

PDF
Inelastic Takahashi hard-rod gas

J. Chem. Phys. 124, 044507 (2006)

Giulio Costantini, Umberto Marini Bettolo Marconi, Galina
Kalibaeva, and Giovanni Ciccotti

PDF
The inelastic hard dimer gas: A nonspherical model for granular
matter

J. Chem. Phys. 122, 164505 (2005)

Fabio Cecconi, Umberto
Marini Bettolo Marconi, Fabiana Diotallevi, and Andrea Puglisi

Inelastic hard rods in a periodic potential

J. Chem. Phys. 121, 5125 (2004)
PDF

Fabio Cecconi, Fabiana Diotallevi, Umberto Marini Bettolo Marconi, and
Andrea Puglisi

6. Fluid-like behavior of a one-dimensional granular gas

J. Chem. Phys. 120, 35 (2004)

PDF
6. Fluid-like behavior of a one-dimensional granular gas

J. Chem. Phys. 120, 35 (2004)

G. Costantini, C. Cattuto, D. Paolotti and U. Marini Bettolo Marconi,

Behavior of Granular Mixtures in Shaken Compartmentalized Containers

Physica A 347, 411 (2005). PDF

Behavior of Granular Mixtures in Shaken Compartmentalized Containers

Physica A 347, 411 (2005). PDF

Umberto Marini Bettolo Marconi and Pedro Tarazona

Dynamic density functional theory of fluids

J. Chem. Phys. 110, 8032 (1999)

Aphrodite Papadopoulou, Frank van Swol, and Umberto
Marini Bettolo Marconi

8. Pore-end effects on adsorption hysteresis in cylindrical and slitlike pores

PDF
8. Pore-end effects on adsorption hysteresis in cylindrical and slitlike pores

J. Chem. Phys. 97, 6942 (1992)

Ziming Tan, Umberto Marini
Bettolo Marconi, Frank van Swol, and Keith E. Gubbins

Hard-sphere mixtures near a hard wall

Hard-sphere mixtures near a hard wall

J. Chem. Phys. 90, 3704 (1989) PDF

Brian K. Peterson, Keith E. Gubbins, Grant
S. Heffelfinger, Umberto Marini Bettolo Marconi, and Frank van Swol

Lennard-Jones fluids in cylindrical pores: Nonlocal theory and
computer simulation

J. Chem. Phys. 88, 6487 (1988)
PDF

R. Evans and U. Marini Bettolo Marconi

PDF
Phase equilibria and solvation forces for fluids confined between
parallel walls

J. Chem. Phys. 86, 7138 (1987)

R. Evans, U. Marini Bettolo Marconi, and P. Tarazona

PDF
Fluids in narrow pores: Adsorption, capillary condensation, and
critical points

J. Chem. Phys. 84, 2376 (1986)

Corberi, Federico; Marconi, Umberto Marini Bettolo

O(N) model for charge density waves

Physica A Volume: 225, Issue: 3-4, April 1, 1996, pp. 281-293

O(N) model for charge density waves

Physica A Volume: 225, Issue: 3-4, April 1, 1996, pp. 281-293

Conti, Massimo; Marconi, Umberto Marini Bettolo

Novel Monte-Carlo lattice approach to rapid directional
solidification of binary alloys

Physica A Volume: 277, Issue: 1-2, March 1, 2000, pp. 35-46

Conti, Massimo; Marconi, Umberto Marini Bettolo

Fingering in slow combustion

Physica A Volume: 312, Issue: 3-4, September 15, 2002, pp. 381-391

Fingering in slow combustion

Physica A Volume: 312, Issue: 3-4, September 15, 2002, pp. 381-391

Conti, Massimo; Marconi, Umberto Marini Bettolo

Interfacial dynamics in rapid solidification processes

Physica A Volume: 280, Issue: 1-2, May 15, 2000, pp. 148-154

Marconi, U. Marini Bettolo; Petri, A.; Vulpiani, A.

Janssen's law and stress fluctuations in confined dry granular materials

Physica A Volume: 280, Issue: 3-4, June 1, 2000, pp. 279-288

U. Marini Bettolo Marconi, M. Conti and A. Vulpiani

Motion of a granular particle on a rough line

Europhys. Lett. 51 No 6 (15 September 2000) 685-690 PDF

A. Baldassarri, U. Marini Bettolo Marconi and A. Puglisi

Influence of correlations on the velocity statistics of scalar granular
gases

Europhys. Lett. 58 No 1 (April 2002) 14-20 PDF

Umberto Marini Bettolo Marconi, Giulio Costantini and Daniela Paolotti

Granular gases in compartmentalized systems

J. Phys.: Condens. Matter 17 No 24 (22 June 2005) S2641-S2656 PDF

Umberto Marini Bettolo Marconi and Pedro Tarazona

Dynamic density functional theory of fluids

Dynamic density functional theory of fluids

J. Phys.: Condens. Matter 12 No 8A (28 February 2000) A413-A418

M. Conti, U. Marini Bettolo Marconi and A. Crisanti

A microscopic model for solidification

Europhys. Lett. 47 No 3 (1 August 1999) 338-344

<M. A. Munoz, U. Marini Bettolo Marconi and R. Cafiero

Phase separation in systems with absorbing states

Phase separation in systems with absorbing states

Europhys. Lett. 43 No 5 (1 September 1998) 552-557 PDF

Umberto Marini Bettolo Marconi and Alberto Petri

Time dependent Ginzburg - Landau model in the absence of
translational invariance. Non-conserved order parameter domain growth

J. Phys. A: Math. Gen. 30 No 4 (21 February 1997) 1069-1088

M. Conti, F. Marinozzi and U. Marini Bettolo Marconi

Domain coarsening via heat diffusion: A numerical study with the phase field model

Domain coarsening via heat diffusion: A numerical study with the phase field model

Europhys. Lett. 36 No 6 (20 November 1996) 431-436

F Brouers and U M B Marconi

On the antiferromagnetic phase in the Hubbard model

On the antiferromagnetic phase in the Hubbard model

J. Phys. C: Solid State Phys. 15 No 26 (20 September 1982) L925-L928

Dynamical properties of vibrofluidized granular mixtures

D. Paolotti, C. Cattuto, U. Marini Bettolo Marconi, A. Puglisi

Granular Matter 5, 75 (2003). PDF

D. Paolotti, C. Cattuto, U. Marini Bettolo Marconi, A. Puglisi

Granular Matter 5, 75 (2003). PDF

Umberto Marini Bettolo Marconi, Federico Corberi

Time dependent Ginzburg-Landau equation for an N-component model of self-assembled fluids

Europhysics Letters 30, 349 (1995) PDF

Time dependent Ginzburg-Landau equation for an N-component model of self-assembled fluids

Europhysics Letters 30, 349 (1995) PDF

F. Corberi and U.Marini Bettolo Marconi

Growth kinetics in the $\Phi^6$ N-component model. Non conserved order parameter

Growth kinetics in the $\Phi^6$ N-component model. Non conserved order parameter

Modern Physics Letters B, 8, 1115 (1994).

F.Corberi, U.Marini.Bettolo Marconi

Growth Kinetics in the $\Phi ^6$ N-Component Model. Conserved Order Parameter

Modern Physics Letters B, {\bf 8}, 1125 (1994)
PDF

D. Dominici, U. Marini Bettolo Marconi

Effective Action Method for Computing Next to
Leading Corrections of $O(N)$ Models

Physics Letters B 319 171, (1993)

U. Marini Bettolo Marconi, A. Puglisi and A. Baldassarri

Application of simple models to the study of nonequilibrium behavior of inelastic gases.

Phase Transitions, 77, 863 (2004)

Application of simple models to the study of nonequilibrium behavior of inelastic gases.

Phase Transitions, 77, 863 (2004)

A. Baldassarri, U. Marini Bettolo Marconi and A. Puglisi

Kinetics Models of Inelastic Gases}

Kinetics Models of Inelastic Gases}

Math. Mod. Meth. Appl. S. 12, 965 (2002) PDF

A. Baldassarri, U. Marini Bettolo Marconi and A. Puglisi

Velocity fluctuations in cooling granular gases

in Lecture Notes in Physics ``Granular Gas Dynamics'' edited by T.Poeschel and N. Brilliantov, Springer (2003) PDF

J. M. Carmona, U. M. B. Marconi, J. J. Ruiz-Lorenzo, and A. Tarancon

Critical properties of the Ising model on Sierpinski fractals:
A finite-size scaling-analysis approach

Phys. Rev. B 58, 14387-14396 (1998)

R. Medina, U. Marini Bettolo Marconi, and S. J. Sciutto

Exact two-particle effective interaction and superconductivity in the two-level Hubbard model

Exact two-particle effective interaction and superconductivity in the two-level Hubbard model

Phys. Rev. B 39, 4277-4284 (1989) PDF

U.Marini Bettolo Marconi and A.Maritan

Variational approach to the phase diagram of rigid membranes

International Journal of Modern Physics B , 4615 (1993).

U.Marini Bettolo Marconi and Y.C.Zhang

Novel scaling behavior of directed polymers:
disorder distribution with long tails

Journalof Statistical Physics 61, 885 (1990).

M.Bernaschi, L.Biferale, A.Fernandez,
U. Marini Bettolo Marconi,
R.Petronzio and A.Tarancon

The magnetic critical exponent in the three
state three dimensional Potts model

Physics Letters 240 B, 419 (1990).

S.~Sciutto, U.~Marini Bettolo Marconi and R.~Medina

Monte Carlo simulations in fermionic systems:
the three band Hubbard model case

Physica A 171, 139 (1990).

D.K.Chaturvedi, U. Marini Bettolo Marconi and
M.P.Tosi

Mode coupling theory of charge fluctuations spectrum
in a binary ionic liquid.

Il Nuovo Cimento 57B, 319 (1980).

U.Marini Bettolo Marconi and N.H.March

abs:

**Relativistic Theory of the binding energies of heavy
atomic ions**

International Journal of Quantum Chemistry 20, 693 (1981).

R.Evans, P.Tarazona and U.Marini Bettolo Marconi

On the failure of certain integral equations theories to
account for complete wetting at solid-fluid interfaces

Molecular Physics 50, 993 (1983). PDF

U.Marini Bettolo Marconi, J.Wiechen and F.Forstmann

The structure of size asymmetric electrolytes at charged surfaces

abs:

The structure of size asymmetric electrolytes at charged surfaces

Chemical Physics Letters 107, 609 (1984).

P.Tarazona, U.Marini Bettolo Marconi and R.Evans

Pairwise correlations at a fluid-fluid interface:
influence of a wetting film

Molecular Physics 54, 1357 (1985).

PDF

R.Evans and U.Marini Bettolo Marconi

The role of wetting films in capilllary condensation and rise: influence of long-ranged forces

abs:

The role of wetting films in capilllary condensation and rise: influence of long-ranged forces

Chemical Physics Letters 114, 415 (1985).

R.Evans,U.Marini Bettolo Marconi and
P.Tarazona

Capillary condensation and adsorption in cylindrical
and slit-like pores

Faraday Transactions II,82, 1763 (1986).

E.Bruno, U.Marini Bettolo Marconi and R.Evans

abs:

Phase transitions in a confined lattice gas: prewetting
and capillary condensation

Physica A 141, 187 (1987).

P.Tarazona, R.Evans and U.Marini Bettolo Marconi

Phase equilibria of fluid interfaces and
confined fluids

Molecular Physics 60, 573 (1987). PDF

G.S. Heffelfinger, Z. Tan, K.E. Gubbins, U. Marini
Bettolo Marconi and F. van Swol

abs:

Fluid mixtures in narrow cylindrical pores: Computer
simulation and Theory

International Journal of Thermophysics 9, 1051 (1988).

U.Marini Bettolo Marconi and B.L. Gyorffy,

abs:

On the statistical mechanics of interfaces and interfacial fluctuations Physica A159, 221 (1989).

U.Marini Bettolo Marconi and F. van Swol

A model of Hysteresis in narrow pores

Europhysics Letters 8, 531 (1989).

G.S. Heffelfinger, Z. Tan, K.E. Gubbins, U. Marini Bettolo Marconi
and F. van Swol,

Lennard-Jones Mixtures in a Cylindrical Pore.
A Comparison of Simulation and Density Functional Theory

Molecular Simulation 2, 393 (1989).

A.Fernandez, U. Marini Bettolo Marconi and A.Tarancon,

Phase diagram of the $Z(3)$ spin model in three
dimensions

Physics Letters B 217, 314 (1989).

A.Fernandez, U. Marini Bettolo Marconi and
A.Tarancon,

Monte Carlo simulation and Variational study of the
phase diagram of the Potts three state model

Physica A 161, 284 (1989).

M.Bernaschi, L.Biferale,
A.Fernandez, U.Marini Bettolo Marconi,
R.Petronzio and A.Tarancon

Renormalization Group study of the $d=3$, $q=3$
Potts model

Physics Letters
B 231, 157 (1989).

U.Marini Bettolo Marconi and M.M. Telo da Gama

The crossover between complete wetting
and critical adsorption

Physica A 171, 69 (1991).

U.Marini Bettolo Marconi and F. van Swol

Structure effects and phase equilibria of Lennard-Jones
mixtures in a cylindrical pore. A non local density functional
theory

Molecular Physics 72 ,1081 (1991)
PDF

U. Marini Bettolo Marconi, A. Puglisi and A. Vulpiani

La forza dei granelli}

Le Scienze, Agosto 2002

U. Marini Bettolo Marconi, F.Cecconi and A. Puglisi

Simple Models for compartmentalized sand}

Simple Models for compartmentalized sand}

``Traffic and Granular flow 03'' S.P. Hoogendoorn, S.Luding, P.H. Bovy,
M. Schreckenberg, D.E. Wolf Editors, Springer 2005, p. 579.

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