Search results for "non-destructive"
showing 4 items of 44 documents
Preliminary Study of the Mural Paintings of Sotterra Church in Paola (Cosenza, Italy)
2022
A multi-analytical approach was employed to study wall paintings located in the Sotterra church at Paola, in the province of Cosenza, Italy. The site is an underground church (hence the name of Sotterra, which means “under the earth”) rediscovered in the second half of the 19th century, during the building works of the Madonna del Carmine church on the same area. This underground church preserves valuable mural paintings having different styles. The construction’s dating and overlapped modifications made until the site was abandoned is also debated. A wall painting, depicting “The Virgin” as part of the “Annunciation and the Archangel Gabriel” prese…
Modelling the Electromechanical Impedance Method for the Prediction of the Biomechanical Behavior of Dental Implant Stability
2015
Abstract We propose the electromechanical impedance (EMI) technique to assess the stability of dental implants. The technique consists of bonding a piezoelectric transducer to the element to be monitored. Conventionally, electromechanical admittance is used to diagnose structural damage. In this study, we created a 3D finite element model to mimic a transducer bonded to the abutment of a dental implant placed in a host bone site. We simulated the healing after surgery by changing the Young's modulus of the bone-implant interface. The results show that as the Young's modulus of the interface increases, the electromechanical characteristic of the transducer changes.
Novel non-destructive inspection techniques for laser powder deposition inspection
2013
A novel non-destructive testing (NDT) techniques for inspection of parts and components manufactured by Additive Manufacturing Processes (AMP), in particular Laser Metal Deposition (LMD), has been developed. LMD is a technology that has been maturing over the last 20 years and has found application in repair, coatings, hybrid build and 3D near net shape manufacture of small intricate parts that can be used in aero and automobile engines to improve efficiency. Currently this technology cannot be used to supply some of these parts because absence of flaws, which might be left in the component during manufacture, cannot be guaranteed. Today, quality is assessed by sample destructive testing, w…
Pompejin pigmentit : materiaalitutkimuksellinen näkökulma antiikin taiteeseen
2014
Tämän pro gradu-tutkielman tarkoituksena on perehdyttää lukija konservoinnin materiaalitutkimusten kautta muinaisen Pompejin pigmentteihin ja niiden nykyaikaisiin tutkimusmenetelmiin. Tutkielman aineisto koostuu 2000-luvulla luonnontieteellisten alojen soveltavissa julkaisusarjoissa esitellyistä pigmenttitutkimuksista ja niiden tuloksista. Tutkielman aineistona olevien tutkimusjulkaisujen kohteina ovat sekä Pompejin kaivausalueella in situ että Napolin Arkeologiseen Kansallismuseoon siirrettyjen maalausten pigmentit ja niiden kokemat muutokset. Osa näyteaineistosta muodostuu Pompejin alueelta nykyaikaisissa tutkimuskaivauksissa esiinkaiveetuista seinämaalausfragmenteista ja jo aiemmissa kai…