Abstract. The contribution fits into the framework of Digital Heritage, within diagnostic process, leading up to restoration. Control and monitoring architectural heritage are still open topics, with respect requirements as simplicity, non-invasiveness cost-effectiveness both procedures equipment. A peculiar gap concerns accessibility artefact, which could be compromised by bad state preservati...

This paper proposes a new approach for estimating the failure time distribution using the indicator data. The indicators, which are checked by periodic inspection of a standby redundant system, only convey whether at least one failure occurs per interval. The estimation procedure first obtains the estimation of the forward recurrence time using the indicator data. Then the mean is estimated bas...

Fuel channel pressure tubes are critical components of the CANDU reactor core which require periodic inspection to demonstrate continued fitness for service. Ontario Power Generation; Inspection & Maintenance Services Division has been operating a variety of inspection systems to perform volumetric and surface nondestructive examinations of the pressure tubes. Since the early days, ultrasonics ...

Inspection policies are essential for many types of systems for which the status (functioning or failed) can be determined only by actual inspection. Two types of inspection error may occur. A functioning system may be incorrectly assessed as having failed or a failed system may be incorrectly assessed as functioning. These errors are designated as Types I and II respectively, and their impact ...

System failures are usually observed during regular maintenance or inspection and this is especially the case for systems in standby or storage, which is common for safety critical systems. A periodic inspection policy is usually adopted. However, during the inspection, a lot of information is gained about the status of the system. Such information should be used in deciding upon the time for t...

In this section we derive the long-run average performance measures I, R, B, and (de…ned in §3.8) assuming that the …rm employs the threshold disclosure policy described in Lemma 3 in response to the regulator’s periodic inspections. We assume that the disclosure window has an arbitrary size equal to s 2 [0; ]. Recall from §3.4 that last-minute disclosure that occurs under the threshold disclos...

Automated fabric inspection system is important to prevent delivering of inferior quality fabric and designed to increase the accuracy, consistency and speed of defect detection in fabric manufacturing process to reduce labor costs, improve product quality and increase manufacturing efficiency. Fabric inspection is still carried out offline and manually by humans with many drawbacks such as tir...