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The paper shows an extension in the technique of thermally stimulated discharge in open circuit (TSD) consisting in simultaneously measuring the current and its charge on the external circuit as a function of temperature. With it, we were able to show that the noise usually appearing in the current curve of negatively charged Teflon FEP is due to microbreakdown events in the sample. Moreover, we detected...
Long term operation and maintenance of steam and hydropower driven electric power plants requires periodic inspection of the concrete cooling, containment and impoundment structures to assure safety, and reliability. Currently, inspections of large, vertical concrete structures are performed manually which is time-consuming, costly, and exposes workers to potentially dangerous work environments. To...
The experimental and simulated responses of a grounding grid, comprising 20 4-m-×-4-m meshes buried in a 160-Ωm soil, subjected to currents with lightning-patterned waveforms were determined. Simulations considered assumptions of constant and frequency dependent soil resistivity and permittivity. The amplitude and waveform of the measured and simulated grounding potential rise were quite similar and,...
The paper investigates the effectiveness of the privacy mode feature in three widely used Web browsers, and outlines how to investigate when these browsers have been used to perform a criminal or illegal act. It performs an identical test on a privacy mode session for each of the three Web browsers and investigates whether traces are left behind. The analysis is done in three phases. First, common...
The teaching learning process can be fairly complex, especially when students encounter abstract concepts. Research shows that student learning is facilitated when students are provided with multiple channels of instruction, opportunity for practice and accompanying feedback loops. One supplemental instructional vehicle is the use of educational software. We propose a paradigm by which instructional...
Impedance measurements of an encapsulated semiconductor optical amplifier (SOA) were used to obtain the SOA equivalent circuit parameters. The effect of decreasing the packaging inductances and stray capacitances are then analyzed aiming the SOA enhancement as a high-speed electro-optical switch.
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