排序方式: 共有32条查询结果,搜索用时 15 毫秒
21.
Stefano Sfarra Abdelhakim Bendada Clemente Ibarra-Castanedo Dario Ambrosini Domenica Paoletti Xavier Maldague 《International Journal of Architectural Heritage》2015,9(4):367-390
The main goal of this work was the non-destructive testing (NDT) of an ancient fresco (15th century) preserved in the Santa Maria di Collemaggio Church (L’Aquila, Italy) and damaged after the 2009 earthquake. Active infrared thermography (IRT), near-infrared (NIR) reflectography and ultraviolet imaging (UV) were used. In addition, the state of the fresco prior to the earthquake was analyzed by electronic speckle pattern interferometry (ESPI), digital speckle correlation (DSC), raking light, tap, and chemical NDT techniques. The use of these techniques was important for the monitoring of new damages and for a comparison between the results over the years. Square heating thermography (SHT) data were processed using principal component thermography (PCT) and pulsed phase thermography (PPT) algorithms, in order to improve the defects’ signature and to reduce the impact of non-uniform heating and emissivity variations due to the painting’s pigments. A multi-analysis approach, segmentation operators and a specific data correlation method emphasize the overall study of the fresco. Furthermore, the facade and the high altar area were inspected by passive thermography and ground-penetrating radar (GPR), respectively. In the present case, the combined use of NDT techniques was useful to fill in the gaps in the construction history of the building. 相似文献
22.
23.
24.
25.
Dario Coronelli Benedetta Caggioni Francesca Zanella 《International Journal of Architectural Heritage》2015,9(4):510-528
The structure of the Cathedral of Milan is studied. The features of the building and the original aspects of its load-bearing system are discussed. The progressive development of the structural system is described following its historical phases through four centuries. The final configuration is then analyzed with its main load paths. Detailed information, collected during the 20th century restoration work, was used to determine the geometry and loads. Preliminary analyses are based on equilibrium principles, within the framework of limit analysis for masonry constructions. The main structural restoration works taking place during the life of the Cathedral of Milan are outlined. The results provide a basis for the verification of more detailed numerical analyses and a reference for restoration interventions. Furthermore, the introductory analyses presented here develop the knowledge for future studies devoted to the Cathedral of Milan, encompassing structural, construction, and architectural issues. 相似文献
26.
During 2001, the NAUSICAA office organized a research campaign on the site where two carronades had been retrieved by a fishing boat. Side-scan sonar research led to the discovery of a mound and six more carronades. The mound was composed of iron ingots, cannon balls, and tools reused as ballast. After the cleaning of a carronade, it was possible to read the name of the foundry, Du Creusot , and the date, 1806. This evidence was sufficient to identify this as the wreck of the Napoleonic brick, Mercure , lost during the Battle of Grado, fought between an English and French fleet in February 1812. 相似文献
27.
The hull of the Roman wreck at Grado has been preserved under the cargo of amphoras. On the site, a lot of wooden elements of the rigging are preserved, including deadeyes, blocks, and toggles. Three possible bitts were identified, one of them sculpted; two were nailed to the hull while one was loose. Near the keel a lead tube, protected by a wooden box, has been interpreted as a bilge-pump but more probably it was a suction-pump. The tube would have been connected to a piston pump which has not survived. Possible explanations for its use are presented.
© 2005 The Nautical Archaeology Society 相似文献
© 2005 The Nautical Archaeology Society 相似文献
28.
Dario Migliucci 《Journal of Israeli History》2018,37(1):87-111
To date, scholars have not examined the representations of the Middle East conflict in the 1940s and 1950s by the Spanish anti-Francoist movements. This work analyzes media narratives concerning Arabs and Israelis produced between 1947 and 1957 by the communist, socialist and anarchist press. Through a critical analysis of the articles published in those years, it is possible to demonstrate that the coverage of the Spanish left-wing periodicals was not rooted in the realities of the Middle East, but rather in the political and ideological interests of their parties. 相似文献
29.
30.