The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
This paper is a strong critic to the classical procedure used for the prediction of failure occurrences for mechanical and electronic equipment. The present procedure is based on the concept of randomness that has the undoubted vantage of the easiness, moreover, it is traditionally used so it is well known by scientists, technicians and experts in the field, but it a priori renounces to the knowledge...
Traditionally, prognostics has been performed by continuous monitoring of quantities that are empirically assumed to sum up the evolution of the observed phenomenon. Only recently, physics-based model simulations have been considered as a valid help to understand the evolution of the chemical-physical processes leading to failure. Nevertheless, physics-based models have always been paired with data...
A special transformer is presented with the performances summarized in the following. The machine is designed in such a way that is never detached from the network, no matter what happens to the supplied loads and to the connecting lines. Even in case of a short circuit occurrence in one of the supplied loads it does not allow over-current arising neither in the fault load, nor in the transformer...
In this work, the authors study the possibility to use the simulated prognostic with the aim to minimize the maintenance costs. The authors propose the introduction of the uncertainties in the input parameters including those of the degradation material laws obtaining precise and accurate predictions of the process evolution. The use of this procedure has the great advantage of the minimization of...
A methodology to enhance the efficiency of avionic measurements through the support of the ASD S3000L database is proposed. This proposal aims to the integration of an expanded FMEA analysis, supported by the S3000L database structure, with the "in field" avionic measurements. This should lead to the reduction of the times and costs involved into failure identification and resolution and...
Hunger sensation (HS) in humans physiologically shows intraday (circadian) and within-day (ultradian) recursivity. This intrinsic periodicity was investigated by applying the cosinor method and spectral analysis to the 24-hour profile of HS (orexigram) derived by a self-rating score (from 1 to 10 hunger units [HU]) recorded every half-hour. The study of circadian and ultradian recursivity on the orexigram...
In human beings, hunger is a proprioceptive signal that shows intraday (circadian components) and within-day (ultradian components) recursivity. Both periodic components can be investigated by chronobiometric procedures by combining the Cosinor method with spectral analysis. A 24-hour profile of hunger sensation (HS) can be plotted on a 1-to-10 scale of intensity using self-rated scores performed...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.