The estimation of harmonic components of power voltage signals is one of the measurements prescribed by the power quality (PQ) standards (IEC 61000-4-30, 2008). In general, the harmonic components originate from non-linear elements connected to the power system such as non-linear loads (e.g., switched-mode power supplies) or transformers. An example of a distorted voltage measured in an office ...

In this study, we combined different physico-chemical methods to show the effect of overheating on the quality of golden fry cooking oil. Those methods include spectroscopic methods such us 1H-NMR, 13C-NMR and FTIR. Results showed that both overheating and excessive reuse of golden fry cooking oil seriously affected its quality by increasing its density, viscosity and different indexes like ref...

designing an efficient skin for the building can minimize winter heat loss and summer heat gain. double skin façade (dsf) is a good device for achieving such a goal; but its summer overheating is a problem for using it, especially in hot-dry climates such as iran plateau. in this study, after reviewing state of the art strategies for cooling façade cavity, the effect of using some of them (such...

Longitudinal optical phonons have been used to interpret the electronic energy relaxation in quantum dots and at the same time they served as a reservoir, with which the electronic subsystem is in contact. Such a phonon subsystem is expected to be passive, namely, in a long-time limit the whole system should be able to achieve such a stationary state, in which statistical distributions of both ...

Reduced energy consumption is a direct result of building optimization. Solar panels and heat detectors can provide the necessary power. After years refinement development, methods for regulating solar panels' output are finally finding their way into everyday life, where they having dramatic impact on foundations sustainability. This document provides an up-to-date assessment several strategie...

Amorphous sulfated zirconium hydroxide was promoted with iron or manganese via the incipient wetness technique, to give 0.5–3.5 weight% promoter in the final catalyst. An exothermic reaction during the calcination temperature ramp (to 823 or 923 K) leads to a rapid overheating (“glow”) of the sample. XRD shows that crystallization starts before and progresses during the overheating. The surface...