Search results for "SPAZI"
showing 10 items of 630 documents
High-fidelity analysis of multilayered shells with cut-outs via the discontinuous Galerkin method
2021
Abstract A novel numerical method for the analysis of multilayered shells with cut-outs is presented. In the proposed approach, the shell geometry is represented via either analytical functions or NURBS parametrizations , while generally-shaped cut-outs are defined implicitly within the shell modelling domain via a level set function . The multilayered shell problem is addressed via the Equivalent-Single-Layer approach whereby high-order polynomial functions are employed to approximate the covariant components of the displacement field throughout the shell thickness. The shell governing equations are then derived from the Principle of Virtual Displacements of three-dimensional elasticity an…
Nel cyberspazio. Visioni urbane delle giga-città
2015
L’autrice riflette sulle immagini delle giga-città, o smart cities, attualmente in fase di costruzione in aree completamente desertiche dell’India, dell’Africa, del Nuovo Messico, della Cina e degli Emirati Arabi, che strutturano i propri spazi con codici della rappresentazione rapportati alla dimensione del cyberspazio. Il disegno urbano di queste città digitali si caratterizza per gli avveniristici volumi architettonici, per le sperimentazioni tecnologiche e per la lettura attraverso layer delle piattaforme virtuali e delle infrastrutture trasparenti. The author reflects on the images of giga-cities, or smart cities, currently under construction in completely desert areas in India, Africa…
Dispositivi liturgici e sistemi di fruizione negli spazi della devozione
2012
Do soils exist outside Earth?
2010
Abstract On Earth, soils form thanks to the combined action of at least five factors: parent rock, climate, topography, biota, and time. However, the necessity of biota as unavoidable soil forming factor is debated, as important parts of our planet experiencing extreme climates host virtually life-free soils with advanced horizonation. Now that space exploration has greatly expanded our understanding of the Solar System, providing consistent evidences that the loose, unconsolidated "skin" of some nearby rocky bodies is lifeless, it is time to establish if the latter can be considered to be soil in a pedological sense. Our feeling is that, since the concept of soil chiefly bases on the occur…
Un approccio progettuale per la rigenerazione sostenibile
2020
This paper describes the methodology of research and analy- sis that have been adopted in order to develop the targets of the project, along with the design proposal. A literature review about urban regeneration ad its best practices and a deep study of the various features and peculiarities of the area has been conducted. Such a study guided the definition of the criteria that must be ap- plied to develop the project. The proposal of urban regeneration aims to retrain the whole di- strict by retrofitting ENPAM’s buildings and industrial sheds by the railway as well as redesigning the public spaces and the green areas. The remainder of this paper is organized as follows. The first section o…
Layer-wise and equivalent single layer models for smart multilayered plates
2014
Layer-wise and equivalent single layer plate models for magneto-electro-elastic multiphysics laminates are presented in a unified framework. They are based on variable kinematics and quasi-static behavior of the electromagnetic fields. The electromagnetic state of each single layer is preliminary determined by solving the corresponding governing equations coupled with the proper interface continuity and external boundary conditions. By so doing, the electromagnetic state is condensed into the plate kinematics and the layer governing equations are inferred by the principle of virtual displacements. This approach identifies effective mechanical layers, which are kinematically equivalent to th…
An integrated structural health monitoring system based on electromechanical impedance and guided ultrasonic waves
2015
We propose a structural health monitoring (SHM) paradigm based on the simultaneous use of ultrasounds and electromechanical impedance (EMI) to monitor waveguides. Methods based on the propagation of guided ultrasonic waves (GUWs) are increasingly used in all those SHM applications that benefit from built-in transduction, moderately large inspection ranges, and high sensitivity to small flaws. Meantime, impedance-based SHM promises to adequately assess locally the structural integrity of simple waveguides and complex structures such as bolted connections. As both methods utilize piezoelectric transducers bonded or embedded to the structure of interest, this paper describes a unified SHM para…
Embodiment e percezione dello spazio alle origini della cultura indoeuropea
2018
La costruzione dell’identità scaturisce dall’esperienza corporea e dalla sua concreta rappresentazione nello spazio. Lo studio degli universali del linguaggio in relazione ai sistemi di coordinate spaziali utilizzati nelle lingue del mondo ha recentemente attirato l'attenzione della ricerca nell’ambito non solo linguistico, ma anche delle neuroscienze (Diessel 2013: 687; Kemmerer 2010). In particolare, la letteratura esistente sulla tipologia delle espressioni spaziali è tradizionalmente basata sull’assunto che il sistema di riferimento deittico o egocentrico in uso nelle lingue europee moderne costituisca un universale linguistico e culturale. Anche la tradizione filosofica, da Kant (1768)…
A thermodynamically consistent CZM for low-cycle fatigue analysis
2018
A cohesive zone model for low-cycle fatigue analysis is developed in a consistent thermodynamic framework of elastic-plastic-damage mechanics with internal variable. A specific fatigue activation condition allows to model the material degradation related to the elastic-plastic cyclic loading conditions, with tractions levels lower than the damage activation condition. A moving endurance surface, in the classic framework of kinematic hardening, enables a pure elastic behavior without any fatigue degradation for low levels loading conditions.
Advanced models for smart multilayered plates based on Reissner Mixed Variational Theorem
2017
In the present work, families of equivalent singe layer and layer-wise models for the static and free vibrations analysis of magneto-electro-elastic multilayered plates are developed. The models are defined in the framework of a unified formulation, which offers a systematic approach for generating refined plate theories through suitable expansions of the through-the-thickness components of the relevant fields, considering the expansion order as a free parameter. The key features of the developed formulation are: a) the condensation of the electric and magnetic description into the mechanical representation, based on the quasi-static electric-magnetic approximation, which allows to reduce t…