Search results for " norma"

Il portico meridionale della Cattedrale di Palermo : corrispondenze geometriche tra decorazione e architettura

2020

Negli ultimi venti anni si sono diffusi, prima nei centri di ricerca e poi in modo più capillare, scanner tridimensionali e procedure fotogrammetriche capaci di generare simulacri digitali tridimensionali di manufatti. L’uso di strumenti digitali per il rilievo e la rappresentazione di opere d’arte e di architettura ha profondamente trasformato procedure e metodi storicamente consolidati e al contempo ha offerto nuove possibilità di indagine. La possibilità di misurare e sezionare, nello spazio virtuale dei software di rappresentazione, avatar digitali che documentano in modo dettagliato la morfologia e le qualità cromatiche di un artefatto, ha aperto nuove prospettive alle indagini sulle m…

I mille nodi irrisolti. La cattedrale di Cefalù…

2010

La cattedrale di Cefalù, elemento cardine della scena urbana e prestigioso esempio della stagione architettonica inaugurata in Sicilia dai Normanni, contiene nella sua lunga e complessa storia costruttiva, molti nodi ancora problematici; sorta all’inizio del XII secolo, non trovò riferimenti in precedenti costruzioni e il suo cantiere fu il luogo della sperimentazione per le realizzazioni future.

Axonal control of the adult neural stem cell niche.

2014

SummaryThe ventricular-subventricular zone (V-SVZ) is an extensive germinal niche containing neural stem cells (NSCs) in the walls of the lateral ventricles of the adult brain. How the adult brain’s neural activity influences the behavior of adult NSCs remains largely unknown. We show that serotonergic (5HT) axons originating from a small group of neurons in the raphe form an extensive plexus on most of the ventricular walls. Electron microscopy revealed intimate contacts between 5HT axons and NSCs (B1) or ependymal cells (E1) and these cells were labeled by a transsynaptic viral tracer injected into the raphe. B1 cells express the 5HT receptors 2C and 5A. Electrophysiology showed that acti…

Thin-layer chromatography of phenoxyacetic acid herbicides

1981

ENSO IV - Book of Abstracts

2015

The conference addresses questions about the formation, persistence, change and collapse of social-institutional reality; the nature of collective intentionality; the ontogenesis of the capacity for interaction; team reasoning and distributed cognition; collective decision-making; collective responsibility; political power and social change; the role of language in the construction of social and institutional reality; institutional and social normativity; group membership and group identity; the logical and normative structure of cooperation; the psychological and conceptual mechanisms underlying the emergence of social interaction and collective agency; the nature of duties and rights buil…

Collective Intentionality, Language, and Normativity: A Problem and a Possible Solution for the Analysis of Cooperation

2015

In this paper I discuss Searle's analysis of social ontology in the light of his account of the sources of normativity as rooted in the logical structure of language. I conclude that, though his theory of normativity may appear to be inconsistent with his theory collective intentionality, it is really our Background sense of the other that creates a sense of community even before the actual functioning of collective intentionality and language, thereby escaping the dilemma between individualism and collectivism.

“Christo e Jeanne Claude - Collezione Würth”: al Palazzo dei Normanni è sinonimo di avanguardia

2011

Improving color correction across camera and illumination changes by contextual sample selection

2012

International audience; In many tasks of machine vision applications, it is important that recorded colors remain constant, in the real world scene, even under changes of the illuminants and the cameras. Contrary to the human vision system, a machine vision system exhibits inadequate adaptability to the variation of lighting conditions. Automatic white bal- ance control available in commercial cameras is not sufficient to pro- vide reproducible color classification. We address this problem of color constancy on a large image database acquired with varying digi- tal cameras and lighting conditions. A device-independent color repre- sentation may be obtained by applying a chromatic adaptation…

Mathematical Morphology for Color Images: An Image-Dependent Approach

2012

This paper proposes one possibility to generalize the morphological operations (particularly, dilation, erosion, opening, and closing) to color images. First, properties of a desirable generalization are stated and a brief review is done on former approaches. Then, the method is explained, which is based on a total ordering of the colors in an image induced by its color histogram; this is valid for just one image and may present problems in smoothly coloured images. To solve these drawbacks a refinement consisting of smoothing the histogram and using a joint histogram of several images is presented. Results of applying the so-defined morphological operations on several sets of images are sh…

Multichannel single-output color pattern recognition by use of a joint-transform correlator.

1996

A novel method for performing color image recognition by the use of the coherent joint-transform correlator is introduced. The input plane of the proposed method is a spatial rearrangement of the separation into color channels of both the color input scene and the color target. This input plane is gray scaled and monochromatic, thus it can be displayed by the use of amplitude spatial light modulators to achieve real-time operation. The system provides a single output-plane result of the optical coherent addition of the separate channels’ correlation outputs. At the output plane no electronic postprocessing is needed, and the detection decision is achieved simply by the application of thresh…