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This study focuses on the spatial analysis of Las Meninas, the worldwide well-known pictorial art masterpiece by Diego Velázquez. Aesthetics, form, and symbolism, are here interlinked with a geometric pattern dependent on the exact location of the designated viewpoint, which severely obeys to the projective rules of linear perspective, where, as a gem in the gem, even the image of a mirror appears, to masterly highlight the final moral of the story, surprisingly explicated by the appeal to reflection. Sophisticated geometry feature and sublime graphic execution work together in this painting to establish the role of pictorial art as a creative besides imitative activity, representing painting itself in the very act of setting a pictorial reality, all this at the height of the so-called Golden Age of the Spanish art.

A simulation of the dynamic perception of the Necker cube in terms of a two level quantum system – e.g. a qubit realized by a Josephson junction or by an electron of spin ½ controlled by magnetic fields – indicates that the neuro-physiological transformation leading, through a symmetry reduction, to perceptual reversal is controlled by the principles of quantum mechanics. A value of the order of 0,32 mJ.s is estimated for the elementary neuro-physiological action simulating the Planck constant at a mesoscopic level. In this interdisciplinary study key concepts are utilized: symmetry, symmetry reduction, self-organization, superposition principle and ambiguity.

The 43rd UID conference, held in Genova, takes up the theme of 'Dialogues' as practice and debate on many fundamental topics in our social life, especially in these complex and not yet resolved times. The city of Genova offers the opportunity to ponder on the value of comparison and on the possibilities for the community, naturally focused on the aspects that concern us, as professors, researchers, disseminators of knowledge, or on all the possibile meanings of the discipline of representation and its dialogue with 'others', which we have broadly catalogued in three macro areas: History, Semiotics, Science / Technology. Therefore, "dialogue" as a profitable exchange based on a common language, without which it is impossible to comprehend and understand one another; and the graphic sign that connotes the conference is the precise transcription of this concept: the title 'translated' into signs, derived from the visual alphabet designed for the visual identity of the UID since 2017. There are many topics which refer to three macro sessions: - Witnessing (signs and history) - Communicating (signs and semiotics) - Experimenting (signs and sciences) Thanks to the different points of view, an exceptional resource of our disciplinary area, we want to try to outline the prevailing theoretical-operational synergies, the collaborative lines of an instrumental nature, the recent updates of the repertoires of images that attest and nourish the relations among representation, history, semiotics, sciences.