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In , a method and a system for evaluating the strength of welds for construction materials were presented. The authors presented a multistage method which, in the first stage, used acoustic emission (AE) measurements to determine whether the weld is sound; otherwise, the weld needs to be evaluated by destructive testing. In the second stage, if the weld passed this first stage, the authors propose to use AE to determine whether the weld is strong enough to withstand the loads expected for the area of the construction material being welded. The authors compare the results obtained by using AE with those obtained by using a system for destructive testing to evaluate weld-strength. The authors also discuss the limits of the use of this method.
In , the author presented the results of a study on the use of AE to detect the deterioration of concrete structures that have been damaged by earthquakes. Tests were carried out on samples of damaged concrete and measured by AE. The author also proposes a methodology for performing a geometrical characterization of damaged concrete by using a non-contact 3D scanner. The author then analyzes the AE data for the characterization of the damaged concrete, following the change of the AE signatures of the concrete in order to detect structural damages.
The aim of this paper is to evaluate the performance of AE-based systems for vibration monitoring in residential buildings. The authors measure the AE activity of a structure and use it to observe the response of the building . They also use AE data to accurately locate damages in buildings. This paper  presents the results of measurements taken on concrete structures. The concrete structures were fractured in two ways: fatigue and earthquakes. A test program was designed to carry out AE measurements of the concrete. AE measurements were taken at 20 different points on the test structures using calibrated sensors with different sensitivities. The authors detected the changes in the AE response due to the cracks in the concrete. Tests were carried out at two different frequencies (15 and 20 Hz) and 10 different amplitudes (0 to 16 dB). The AE activity results for different types of concrete structures were compared to those obtained by the authors using an acoustic emission test system (STS V20-20, Stellate Technologies, Via Dolfosse, Rome, Italy). Their results indicate that AE-based systems can be used to detect and locate damage in structures; therefore, they can be used to effectively monitor buildings, as the costs of damage or deterioration of concrete structures are estimated.
Sterritt *** Two brothers, ambitious and furious with each other, set about setting up an art gallery that features their gallery worker's work. They open it in their living room, making it a reality shop. As their dreams turn into reality, the brothers find themselves drawn closer and closer to one another. The film is likely to get a cult following in Europe. In English, French, and Dutch with English subtitles. 827ec27edc