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Inescapable shock (IS) exposure induces behavioral inactivity, related to behavioral alterations in subsequent tests (i.e. escape failure during shuttle box task). Previous studies have demonstrated that various antidepressant treatments administered either before or after IS exposure reversed these behavioral deficits. Recently, we demonstrated(More)
This work reports the result of a comparative testing done on four Phasor Measurement Units (PMU) from different manufacturers. Phase shift and attenuation at fundamental frequency, performance under system balanced and unbalanced conditions and performance under system variable frequency are the issues addressed for this comparative assessment. The results(More)
An internet-based, real-time, Global Positioning System (GPS)-synchronized relative to the wide-area frequency-monitoring network (FNET)-has been developed at Virginia Tech. In this FNET system, an algorithm that employs the relationship between phasor angles and deviated frequency [13] is used to calculate both frequency and its rate of change. Tests of(More)
The intestinal Ca2+ absorption is inhibited by menadione (MEN) through oxidative stress and apoptosis. The aim of this study was to elucidate whether the antioxidant and antiapoptotic properties of melatonin (MEL) could protect the gut against the oxidant MEN. For this purpose, 4-week-old chicks were divided into four groups: (1) controls, (2) treated i.p.(More)
(ABSTRACT) A single-phase grid connected transformerless photovoltaic (PV) inverter for residential application is presented. The inverter is derived from a boost cascaded with buck converter along with a line frequency unfolding circuit. Due to its novel operating modes, high efficiency can be achieved because there is only one switch operating at high(More)
1 This paper discusses measurements of the dynamic performance of electric power Phasor Measurement Units, PMUs, and their relation to the requirements of the IEEE Synchrophasor Standard C37.118-2005. In particular, it proposes a new method for monitoring the dynamic power signals that change in amplitude and frequency during the testing of PMUs. The new(More)
Power grid's traditional security assessment approach – based on SCADA data and off-line studies conducted long in advance of real time operations – are becoming increasingly problematic for real time operations because they cannot fully anticipate all the conditions faced by operators. New technologies that rely on accurate, high-resolution, real-time(More)