Search results for "COSTRUZIONE"
showing 10 items of 669 documents
Architettura altomedievale nel Santuario di San Michele: analisi stratigrafica degli elevati e studio ricostruttivo 3D
2012
Il Santuario di San Michele a Monte Sant’Angelo (FG) costituisce uno dei più importanti e antichi luoghi della cristianità occidentale. La sede del culto riservato all’Angelo è posta all’interno di una Caverna situata a metà del fianco settentrionale del rilievo montuoso sul cui pianoro si estende il centro abitato. Il contributo riguarda lo studio architettonico, dal rilievo alla lettura stratigrafica muraria fino alla ricostruzione virtuale, del monumento di età longobarda The Sanctuary of San Michele in Monte Sant’Angelo (FG) is one of the most important and ancient places of Western Christianity. The seat of the cult reserved for the Angel is placed inside a Cave located in the middle o…
I Telamoni del Tempio di Zeus ad Agrigento: rilievi, disegni e ricostruzioni
2013
Oggetto dello studio qui presentato è la ricostruzione di un intercolumnio del fronte esterno del Tempio di Zeus ad Agrigento, basata sul rilievo del Telamone oggi custodito presso il Museo Archeologico, sugli studi e i numerosi saggi di ricostruzione proposti dagli studiosi dal XVIII secolo fino alla metà dello scorso secolo e sulla analisi strutturale del Telamone ricostruito nel Museo. The drawings of the telamones, the giant statues placed the front of the Temple of Zeus in the archaeological area of Agrigento, have fascinated some of the most famous neoclassical architects in Europe. The virtual reconstruction of one intercolumnial of the Temple, based both on the range-based survey of…
Implementation of active infrared NDT techniques using long square heating pulses
2012
The present work describes the implementation of active IR Thermography techniques for the NDT of thick polymer and glass-fibre reinforced polymer (GRP) composite panels. A low cost Thermal NDT set-up is proposed, comprising a single-detector IR camera with low thermal resolution and low frame rate, and common low-power halogen lamps as external heat source devices. The use of halogen lamps in particular requires several seconds of switch-on time in order to deliver meaningful and effective heat quantities. The influence of such long heat deposition intervals is investigated on the possibility to implement Transient Thermography and Lock-In Thermography techniques. Regarding the Transient T…
On the biomechanical function of scaffolds for engineering load-bearing soft tissues
2009
Replacement or regeneration of load-bearing soft tissues has long been the impetus for the development of bioactive materials. While maturing, current efforts continue to be confounded by our lack of understanding of the intricate multi-scale hierarchical arrangements and interactions typically found in native tissues. The current state of the art in biomaterial processing enables a degree of controllable microstructure that can be used for the development of model systems to deduce fundamental biological implications of matrix morphologies on cell function. Furthermore, the development of computational frameworks which allow for the simulation of experimentally derived observations represe…
Micro - Architectural Data Extraction for Electrospun Poly (Ester Urethane) Urea Scaffolds for Biomechanical Modeling.
2009
Problem: Soft tissue engineered applications have raised the need for accurate descriptions of tissue microstructure and their contributions to global mechanical behavior [1]. Accurate material image analysis is crucial to model engineered tissue biomechanics. The present study proposes a novel method to automatically collect micro-architectural data from electron micrographs (SEM) of electrospun poly (ester urethane) urea (PEUU). Methods: Sets of contiguous SEM images for electrospun PEUU scaffolds made using three mandrel collection tangential velocities (1.5, 4.5, 9.0 m/s) were analyzed. A combination of thresholding and morphological procedures enabled overlaps of fibers to be detected.…
FUCILE DA PESCA SUBACQUEO A DUE FUSTI ORIZZONTALI CON ASTA SINGOLA O DOPPIA
2010
Il brevetto ha per oggetto un fucile subacqueo caratterizzato da due aste, o arpioni, indipendenti che possono essere sparate separatamente. Un’altra variante dell’invenzione prevede una singola asta. Il brevetto presenta numerosi innovazioni che si traducono in significativi vantaggi funzionali rispetto ai fucili subacquei ad elastico attualmente sul mercato. Oltre ai numerosi benefici derivanti dalla possibilità del doppio sparo, lo schema costruttivo azzera le deformazioni dovute al carico esercitato dagli elastici in tensione di cui soffrono i tradizionali fucili subacquei ad elastico, ne consegue una elevata precisione del tiro anche con fusti di piccolo diametro, molto idrodinamici, r…
Il ponte delle Teste sul fiume Oreto
2015
Il fortuito ritrovamento al di sotto del terreno di riporto, di un antico ponte in muratura ancora perfettamente integro, ha sollecitato una ricerca sull’epoca e le tecniche di costruzione adottate. Attraverso l’analisi delle fonti antiche, della cartografia attuale e storica, delle cronache del tempo si è delineata la storia del sistema di attraversamento del fiume Oreto, l’espansione della città fino all’area del ponte, ritrovando quelle pratiche sociali che hanno fatto attribuire il nome non consueto. Lo studio ha inoltre ripercorso le vicende costruttive delle diverse strutture che si sono susseguite nel sito, dalla fine del XVI secolo a pochi anni addietro. Si sono ritrovate informazio…
A novel clustering-based algorithm for solving spatially-constrained robotic task sequencing problems
2021
The robotic task sequencing problem (RTSP) appears in various forms across many industrial applications and consists of developing an optimal sequence of motions to visit a set of target points defined in a task space. Developing solutions to problems involving complex spatial constraints remains challenging due to the existence of multiple inverse kinematic solutions and the requirements for collision avoidance. So far existing studies have been limited to relaxed RTSPs involving a small number of target points and relatively uncluttered environments. When extending existing methods to problems involving greater spatial constraints and large sets of target points, they either require subst…
Influence of the distance between rivets in self-piercing riveting bonded joints made of carbon fiber panels and AA2024 blanks
2012
Abstract The increasing use of new materials alternative to steel in manufacturing industry has led to a greater emphasis on the improvement and the development of specific joining approaches allowing to get effective mechanical properties even when different materials are joined together. It should be observed that often the traditional welding techniques show several limitations as aluminum or magnesium alloys are used, and, what is more, they are not compatible with composite materials. The development of structures made of these materials has renewed the use of mechanical fastening operations. The present paper investigates the influence of the distance between rivets in self-piercing r…
Quantitative thermoelastic stress analysis by means of low-cost setups
2020
Abstract A low-cost Thermoelastic Stress Analysis (TSA) experimental setup is proposed which uses an ordinary micro-bolometer and in-house developed signal processing scripts. The setup is evaluated by analysing the thermoelastic signal from a tensile and a SENT specimen made of stainless steel AISI 304L, and the bolometer performances are compared with those of a state of the art photon detector. Signal processing is based on off-line cross-correlation, using a self-reference signal which is retrieved from the acquired thermal data. Procedures are in particular developed to recognise, quantify and correct errors due to spectral leakage and loss of streamed frames. The thermoelastic signal …