17,064 research outputs found
A conformal invariant growth model
We present a one-parameter extension of the raise and peel one-dimensional
growth model. The model is defined in the configuration space of Dyck (RSOS)
paths. Tiles from a rarefied gas hit the interface and change its shape. The
adsorption rates are local but the desorption rates are non-local, they depend
not only on the cluster hit by the tile but also on the total number of peaks
(local maxima) belonging to all the clusters of the configuration. The domain
of the parameter is determined by the condition that the rates are
non-negative. In the finite-size scaling limit, the model is conformal
invariant in the whole open domain. The parameter appears in the sound velocity
only. At the boundary of the domain, the stationary state is an adsorbing state
and conformal invariance is lost. The model allows to check the universality of
nonlocal observables in the raise and peel model. An example is given.Comment: 11 pages and 8 figure
Digital technologies for virtual recomposition : the case study of Serpotta stuccoes
The matter that lies beneath the smooth
and shining surface of stuccoes of the Serpotta family, who used to work in Sicily from 1670 to 1730, has
been thoroughly studied in previous papers, disclosing
the deep, even if empirical, knowledge of materials science that guided the artists in creating their master-
works. In this work the attention is focused on the solid
perspective and on the scenographic sculpture by Giacomo Serpotta, who is acknowledged as the leading exponent of the School. The study deals with some particular works of the artist, the so-called "teatrini" (Toy
Theater), made by him for the San Lorenzo Oratory in
Palermo. On the basis of archive documents and previous analogical photogrammetric plotting, integrated
with digital solutions and methodologies of computer-
based technologies, the study investigates and interprets
the geometric-formal genesis of the examined works of
art, until the prototyping of the whole scenic apparatus.peer-reviewe
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