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In this paper, we use a fluid model to describe the dynamics of the conduction electrons of multiwall carbon nanotubes. A 3-D integral formulation of Maxwell's equations is used and numerically solved with a finite-elements approach based on div- conforming basis functions. The null-piny decomposition is used to avoid the low-frequency breakdown. Index Terms--Multiwall carbon nanotubes (MWCNs), surface integral equations.

A three-dimensional full-wave surface integral formulation is used to predict the terminal response of unshielded twisted pairs. The proposed approach allows taking into account the skin effect, proximity effect and radiation losses. The proposed full-wave simulation is validated by comparing the results with those obtained by a software tool based on the finite integration technique, discussing advantages and limitations. The surface integral formulation results obtained on a short length of the line are used to predict the behavior of a longer line. In addition, they are used to extract equivalent circuits suitable for the time domain analysis by any commercial circuit simulator. Index Terms--Integral equations, nonuniform transmission lines, numerical analysis, unshielded twisted pairs (UTPs).

In this paper, we use an integral formulation of the Maxwell's equations (magneto-quasi-static limit) in the presence of superconductors to analyze a resistive joint for cables of interest for controlled thermonuclear fusion. Index Terms--Edge elements, integral equations, superconducting cable joints, superconducting magnets.