En la obra de Carmen Martín Gaite, el espejo roto y rompecabezas son imágenes complementarias que simbolizan tanto problemática escisión del sujeto como adopción una estética fragmentaria, siendo consecuencia otra. A partir teoría lacaniana stade du miroir sus repercusiones en ámbito conocimiento, este artículo explica crisis representación afecta a autora su consiguiente búsqueda formas expres...

We have investigated the structure and nuclear magnetic resonance (NMR) spectroscopic properties of some dihydrogen endofullerene nitroxides by means of density-functional theory (DFT) calculations. Quantum versus classical roto-translational dynamics of H₂ have been characterized and compared. Geometrical parameters and hyperfine couplings calculated by DFT have been input to the Solomon-Bloem...

Biofouling in pipelines is a function of the inner roughness of the specific piping material that is used in distribution systems and the concomitant biofilm formation. To test the effect of velocity on the growth of biofilm, a Roto-Scope was designed and built to imitate different materials and flow conditions in potable water distribution systems. Biofilm formation was monitored using DAPI st...

The title compound, (C(4)H(12)N(2))(3)[PMo(12)O(40)] or (H(2)pip)(3)[PMo(12)O(40)] (pip is piperazine), was prepared under hydro-thermal conditions. The asymmetric unit contains one-sixth of a mixed-valent Mo(V,VI) pseudo-Keggin-type [PMo(12)O(40)](6-) anion and half a piperazinediium cation, (H(2)pip)(2+). The discrete Keggin-type [PMo(12)O(40)](6- )anion has site symmetry and the three (H(2)p...

We investigate solutions to the minimal surface problem with Dirichlet boundary conditions in the roto-translation group equipped with a subRiemannian metric. By work of G. Citti and A. Sarti, such solutions are amodal completions of occluded visual data when using a model of the first layer of the visual cortex. Using a characterization of smooth minimal surfaces as ruled surfaces, we give a m...

For the single-wall carbon nanotubes conducting in the simplest tight binding model, the complete set of line group symmetry based quantum numbers for the bands crossing at Fermi level are given. Besides linear (k), helical (k̃ and angular momenta, emerging from roto-translational symmetries, the parities of U axis and (in the zig-zag and armchair cases only) mirror planes appear in the assignat...