Search results for " SCIENZA"

Gestalt/Gestalt Theory

2020

Gestalt is a concept introduced to solve the problems of unity, connection and order that objects manifest in experience. Philosophers trained at Franz Brentano’s teaching began to work on it to address epistemological and ontological questions about perception, cognition and the structure of objects. This work was seminal for Gestalt psychology, from the research of the Graz and Berlin Schools, carried on by Cesare Musatti, Fabio Metelli, Gaetano Kanizsa, Paolo Bozzi in Padua and Trieste, Albert Michotte and Paul Fraisse in Louvain, to that of Edgar Rubin and David Katz, but also of Karl Buhler, Egon Brunswik and Ludwig Kardos in Wien. Common is the tenet that the world looks as neither a …

STRUMENTO MEDICO PER INSERIMENTI INTRALUMINALI

2018

La presente invenzione trova applicazione nel settore dei dispositivi medici inseribili all’interno del corpo umano ed ha particolarmente per oggetto uno strumento medico per inserimenti intraluminali, quali dispositivi per incannulazione o cateterizzazione del sistema vascolare.

Graph

2020

A graph is any abstract object that consists of vertices and edges. This entry presents the main attributes of vertices and edges.

Green Composites Based on Mater-Bi® and Solanum lycopersicum Plant Waste for 3D Printing Applications

2023

3D printability of green composites is currently experiencing a boost in importance and interest, envisaging a way to valorise agricultural waste, in order to obtain affordable fillers for the preparation of biodegradable polymer-based composites with reduced cost and environmental impact, without undermining processability and mechanical performance. In this work, an innovative green composite was prepared by combining a starch-based biodegradable polymer (Mater-Bi®, MB) and a filler obtained from the lignocellulosic waste coming from Solanum lycopersicum (i.e., tomato plant) harvesting. Different processing parameters and different filler amounts were investigated, and the obtained sample…

Guided Wave Techniques for Damage Detection in Composite Aerospace Structures

2018

Composite materials make up an increasing portion of today’s aerospace structures (see, e.g. Boeing 787 and Airbus 380). These aircrafts’ fuselage, for example, is composed of a laminated composite skin connected to composite stringers and C-frames. Of primary importance is the detection of damage in these built-up structures, whether caused by the manufacturing process or in service (e.g. impacts). A related issue is the characterization of the composite (visco)elastic mechanical properties, that can also be related to the quantification of potential damage. Guided elastic waves propagating in the ~100s kHz regime lend themselves to provide the necessary sensitivity to these two conditions…

I diritti umani come tema conflittuale nel Consiglio di Sicurezza delle Nazioni Unite

2019

With the end of the Cold War and the expansion of the international liberal order, human rights have entered the UN Security Council agenda. However, this has become a divisive issue. In a context of greater influence of the US and its Western allies over the decision-making process of the most important multilateral institutions, the UN above all, the interpretation allowing intrusive practices by the Security Council promoted by the Western permanent members has clashed with the defense of sovereignty promoted by Russia and China. Analyzing divisive resolutions with reference to human rights in the period 2001-2017 (Lebanon, Myanmar, Zimbabwe, Libya and Syria) and the only thematic meetin…

Sviluppo storico sino al 1998 della Scienza delle Costruzioni e della Tecnica delle Costruzioni nell'Ateneo Palermitano

2008

Nel contributo viene tracciata la storia della Scienza e Tecnica delle costruzioni dell'Università di Palermo a partire dalla Reale Scuola di applicazione per ingegneri e Architetti di Palermo, 1866, passando per il Gabinetto di Meccanica applicata alle Costruzioni, 1923, e per i successivi cambiamenti che portarono al Dipartimento di Ingegneria Strutturale e Geotecnica, 1985. Viene inoltre tracciata la storia dell'annesso Laboratorio di prove sui materiali da costruzione attraverso le attività svolte ed i macchinari acquisiti.

Novel organo-modifier for thermally-stable polymer-layered silicate nanocomposites

2015

A new novel approach for the stabilisation of polymer-clay nanocomposites has been investigated based on reacting chemically an antioxidant function, a hindered phenol moiety, with an organic modifier based on a quaternary ammonium salt. The chemically linked antioxidant-containing organic modifier (AO-OM) was then introduced into natural montmorillonite (MMt) through a cation-exchange reaction resulting in antioxidant-containing organo-modified clay (AO-OM-MMt). The new antioxidant-containing modified clay, along with other organo-modified clays having a similar organo-modifier but without the reacted antioxidant, were characterised by spectroscopic, thermogravimetric and x-ray diffraction…

An Interface Model for the Analysis of Anisotropy of Friction and Wear of Contact Surfaces

2008

Effective reference and current integration for large displacement interface

2016

The most common interface formulations proposed in literature are generally based on the restrictive hypothesis of small strains and small displacements and, even though their application to geometrically nonlinear problems is of paramount interest, only few contributions are available in literature. Motivations are probably due to the difficulties encountered on such formulation, as already mentioned by several authors. A pioneering formulation is the finite displacement three-dimensional interface developed by Ortiz and Pandolfi in [1], where normal and tangential traction components are evaluated with respect to the middle surface in the current configuration, producing a non-symmetric g…