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Arrays of coupled split ring resonators (SRRs) capable of carrying slow short-wavelength magneto-inductive waves have been shown to support the rapidly varying current distributions required for superdirectivity. However, the superposition of both electric and magnetic dipole resonance modes contributing to radiation of SRRs challenge pure physical intuition in the selection of the optimal dimer configuration...
The oil-impregnated paper, which is the major section in converter transformer, plays a considerable role in the reliability and safety of power grid. However, the insulation degradation will be accelerated by the accumulation of charges that are on the surface of oil-impregnated paper. Therefore, the operating overvoltage occurs and irremediable damage will appear. Direct fluorination is an effective...
A century-long quest for realizing superdirective antennas has got a new lease of life with the advent of metamaterials: Arrays of coupled meta-atoms capable of carrying slow short-wavelength magneto-inductive waves were shown to be promising candidates for realizing rapidly varying current distributions required for superdirectivity. This paper provides an overview of our work towards realizing a...
With the increase of data rate, signal integrity (SI) becomes a bigger challenge for printed circuit board (PCB) designs. Power noise as well as signal loss, inter-symbol interference (ISI), crosstalk needs to be taken into account to ensure a good quality signal design. In this paper, a design case is shared where power noise greatly impacts SATA performance and leads to hard disk (HDD) disconnection...
In this paper, channel noise scan approach (CNS) is proposed to efficiently analyze the potential VR-signal coupling issue in the pre-silicon design and the post-silicon debug of the platform development. CNS is based on a new simulation methodology that includes the whole PCB with signals, voltage regulator (VR) networks, and the interaction between the two. The goal of this simulation methodology...
The sources of ionospheric forcing are from above (solar and magnetospheric forces), internal (chemistry, local neutral dynamics), and from below (lower atmosphere). In this work we review the observed ion-neutral coupling effects at equatorial and low latitudes during large meteorological events called sudden stratospheric warming (SSW). Research in this direction has been accelerated in recent years...
Quantitative simultaneous monitoring of the expression levels of thousands of genes under various experimental conditions is now possible using microarrays. However, there are still gaps toward whole-genome functional annotation of genes using gene expression data. In this paper, we propose a novel technique called fuzzy nearest clusters for functional annotation of unclassified genes. The technique...
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