1,720,988 research outputs found
First order wetting of rough substrates and quantum unbinding
No full textReplica and functional renormalization group methods show that, with short-range substrate forces or in strong fluctuation regimes, wetting of a self-affine rough wall in two dimensions turns first order as soon as the wall roughness exponent exceeds the anisotropy index of hulk interface fluctuations. Different thresholds apply with long-range forces in mean held regimes. For bond-disordered bulk, fixed point stability suggests similar results, which ultimately rely on basic properties of quantum bound states with asymptotically power-law repulsive potentials
Figure 1 in Species composition and patterns of diversity of macroalgal coralligenous assemblages in the north-western Mediterranean Sea
No full textFigure 1. Map of the study area. Notes: L, Livorno; A, Argentario; V, Vada; Me, Meloria; Go, Gorgona; C, Capraia; E, Elba; P, Pianosa; Mo, Montecristo; F, Formiche di Grosseto; Gn, Giannutri; Gi, Giglio.Published as part of Piazzi, L., Balata, D., Cecchi, E., Cinelli, F. & Sartoni, G., 2010, Species composition and patterns of diversity of macroalgal coralligenous assemblages in the north-western Mediterranean Sea, pp. 1-22 in Journal of Natural History 44 (1-2) on page 3, DOI: 10.1080/00222930903377547, http://zenodo.org/record/466672
UNUSUAL UNIVERSALITY OF BRANCHING INTERFACES IN RANDOM-MEDIA
No full textWe study the criticality of a Potts interface by introducing a froth model which, unlike its solid-on-solid Ising counterpart, incorporates bubbles of different phases. The interface is fractal at the phase transition of a pure system. However, a position space approximation suggests that the probability of loop formation vanishes marginally at a transition dominated by strong random bond disorder. This implies a linear critical interface, and provides a mechanism for the conjectured equivalence of critical random Potts and Ising models
Effect of surface roughness on bulk disorder induced wetting
No full textTransfer-matrix results in 2D show that wetting of a rough, self-affine wall induced by bulk bond disorder turns discontinuous as soon as the wall roughness exponent zeta w exceeds zeta(0) = 2/3, the spatial anisotropy index of interface fluctuations in the bulk. For zeta(W) < 2/3 critical wetting is recovered, in the same universality class as for the flat-wall case. These and related findings suggest a free-energy structure such to imply first-order wetting also without disorder, or in 3D, whenever zeta(W) exceeds the appropriate zeta(0). The same thresholds should apply also with van der Waals forces, in cases when Co implies a strong-fluctuation regime
Mesophyllum macroblastum (Hapalidiaceae, Corallinales, Rhodophyta) in the Northern Adriatic (Mediterranean Sea) and a key to Mediterranean species of the genus.
No full textThe coralline red alga Mesophyllum (Hapalidiaceae) is recorded for the first time from the Gulf of Trieste (Northern Adriatic Sea) and gametangial plants of M. macroblastum are recorded for the first time from the Mediterranean Sea. A morphological-anatomical account is provided, including comparisons with specimens from the western coast of Italy and with published data. Distribution and habitat information, comparison with Mediterranean species of Mesophyllum, and a dichotomous key to Mediterranean species are included along with brief comments on other species in the genus known to produce volcano-like tetrasporangial conceptacles
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