Antonella Peresan, Franco Vaccari, Andrea Magrin, Giuliano F. Panza
Department of Geosciences, University of Trieste
The Abdus Salam International Centre for Theoretical Physics, ICTP SAND Group. Trieste – Italy

Stefano Cozzini
Consiglio Nazionale delle Ricerche, Istituto Officina dei Materiali, CNR/IOM uos Democritos. Trieste – Italy.

(paper to be submitted in 2012)

M. V. Hosur (2010)

INSA NEWS, Issue 202, page 5, published by the Indian National Science Academy, New Delhi

Giorgi, F., Coppola, E., Solmon, F., Mariotti, L., Sylla, M., Bi, X., Elguindi, N., Diro, G. T., Nair, V., Giuliani, G., Cozzini, S., Guettler, I., O’Brien, T. A., Tawfik, A., Shalaby, A., Za- key, A., Steiner, A., Stordal, F., Sloan, L., and Brankovic, C.:

Clim. Rev., accepted, 2011.
pp. 3439, 3441

These results show RegCM-UW as a nascent mesoscale stratocumulus model that is 15 appropriate for stratocumulus investigations at scales ranging from hourly to decadal.
The source code for RegCM-UW is publicly available, under the GNU license, through the International Centre for Theoretical Physics.

S. A. Blundell, SPSMS, UMR-E CEA/UJF-Grenoble 1, INAC, Grenoble, F-38054, France
Soumyajyoti Haldary, Centre for Modeling and Simulation, University of Pune, Ganeshkhind, Pune 411 007, India and Department of Physics, University of Pune, Ganeshkhind, Pune 411 007, India.
D. G. Kanherez, Department of Physics, University of Pune, Ganeshkhind, Pune 411 007, India.

Dated: March 2, 2011

Abstract. We determine the structure and melting behavior of supported metallic clusters using an ab intio density-functional-based treatment of intracluster interactions and an approximate treatment of the surface as an idealized smooth plane yielding an eective Lennard-Jones interaction with the ions of the cluster. We apply this model to sodium clusters containing from 4 to 22 atoms, treating the cluster-surface interaction strength as a variable parameter. For a strong cluster-surface interaction, the clusters form monolayer structures; comparisons with calculations of structure and dissociation energy performed with a classical Gupta interatomic potential show clearly the role of quantum shell eects in the metallic binding in this case, and evidence is presented that these shell eects correspond to those for a conned two-dimensional electron gas. The melting behavior of a supported Na20 cluster is considered in detail using the model. Some qualitative similarities are observed in the melting dynamics between the density-functional and Gupta treatments of the cluster, involving either interlayer hops or in-plane melting according to the cluster-surface interaction strength, but there are quantitative dierences in the specic-heat curves and melting temperatures observed.

S. A. Blundell and S. Chackoy, SPSMS, UMR-E CEA/UJF-Grenoble 1, INAC, Grenoble, F-38054, France.

Dated: March 14, 2011

Abstract. An accurate conguation-interaction method employing a mean-eld basis set is used to study the excitation spectrum of localized Wigner states in the strongly interacting regime of a quasi-twodimensional parabolic quantum dot with N = 6 electrons. The approach achieves errors of order 1 part in 104 (or better) in the energies of low-lying states for a Wigner-Seitz radius rs = 12 a 0{16 a 0 , and is used to study low-lying spin, rotational, vibrational, and  isomeric excitations. The vibrational excitations at rs = 50 a 0 are shown to correspond qualitatively with the classical normal modes of the N = 6 electron dot, although the excitation energies agree only semiquantitatively with the classical normal-mode frequencies as a result of residual quantum uctuations.