Physico-chemical characterization of anodic films on sputter-deposited Al-Nb alloys.

Due usi italiani di "enunciazione"

This article examines two uses of the word enunciation in some recent contributions of the italian semiotics: a) “enunciation” as activation of open semantic potentials (VIOLI 2003) ; b) “enunciation” as modulation of local encyclopedic sections (PAOLUCCI 2010). Thanks to the theoretical resources of two fundamental research programs as Benveniste’s linguistics (LEB) and Culioli’s theory of predicative and enunciative operations (TOPE), we try to demonstrate that these uses are variants of the same general idea, i.e. “actualization” of encyclopedic virtualities. In the last section of the paper, we formulate some questions that remain open in the context of this investigation.

Patent number PA2010 A 000023: Sistema biocompatibile di supporto per la piantumazione di organismi vegetali in ambiente marino

Il brevetto consiste in un sistema a basso impatto ambientale, realizzato interamente in bioplastica, per il fissaggio sul fondo marino in forma rapida ed efficace di organismi vegetali, allo scopo di garantirne l'attecchimento e la crescita, assecondandone la dinamica naturale di sviluppo.

Characterization of Thin Passive Film-Electrolyte Junctions.The Amorphous Semiconductor (a-SC) Schottky Barrier Approach

The knowledge of the solid-state properties of passive film is a preliminary task for a full understanding of the electron and ion transfer processes at the metal/oxide and oxide/electrolyte interface. Both processes are of paramount importance in determining the mechanism of film growth and dissolution as well as in determining the nature of the breakdown during the growth of anodic oxide films or the onset of generalized or localized corrosion process (1-2). With very few exceptions, it is a common belief, that most of anodic oxide films, grown on metals and alloys in aqueous solutions, display a semiconducting or insulating behaviour. It is also very well known that in many cases the ini…

Phenomenology and Semiotics. Crossing Perspectives.

In recent years the study of relationships between semiotics and phenomenology seems to be entering a period of renewed vitality and creativity (CADIOT & VISETTI 2001; ROSENTHAL & VISETTI 2008; 2010; PIOTROWSKI 2009; FONTANILLE 2008; BONDÌ 2012). For a variety of theoretical and historical reasons, there has been a constant osmosis between phenomenological and semiotic methods. In short, on one side, the works and investigations of phenomenologists have provided essential tools to semiotics. To give just an example: the greimasian semiotics theory refers to the process of meaning formation in terms of perceptual apprehension thanks to his original recovery of Merleau-Ponty’s percept…

Assessment on the use of the amorphous semiconductor theory for the analysis of oxide films

Abstract Although the theory of Schottky barrier in amorphous semiconductors is generally accepted, the limits of validity of such theory have not yet been explored. The classic semi-analytical solution is obtained under the constraint of constant electronic density of states (DOS) distribution in the mobility gap. In order to take into account the presence of a DOS variable in energy, a semi-empirical corrective power law was introduced in this paper. It is shown that the equations derived for thick films maintain their validity also in the case of thin films, provided that the space charge region width remains lower than 70% of the whole film thickness. A new expression based on the use o…

Dielectric Properties of Al-Nb Amorphous Mixed Oxides

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