OJp = tether cross-sectional area = surface magnetic field intensity at equator = motional electric field projected along the tether = Lorentz force = average dimensionless current = dimensionless current at the load = tether length = electron mass, m, = 9.10938188 x lO^^' kg = perimeter of the tether cross section = electron charge, q, = 1.60217646 x lO"' ' C) = planet radius = orbit radius = ...

A theoretical ac impedance model of biological tissue has been proposed after studying a cellular membrane using X-ray diffraction technique [1], a metal/organic system using ac impedance spectroscopy [2] and reviewing two pieces of literature of similar topics [3,4]. This paper emphasizes ac impedance techniques which can be used to study any heterogeneous materials in order to develop a lumpe...

Mains impedance is a critical parameter to consider when diagnosing load generated power quality problems. High impedance can contribute to voltage sags, low voltage conditions, high frequency noise, transient impulses, and harmonic voltages. These problems can be created by the critical load, or by other loads powered from the same electrical source. This paper presents the concept of mains im...

In this note, we show that the impedance control strategy proposed in the paper is not feasible from practical implementation point of view. Next, a robust impedance controller is proposed for electrically driven robots using Fourier series (FS). The fact that robots' actuators have limited voltage is also considered in controller design procedure. In comparison with other impedance controllers...

We have developed two analytical models to describe the performance of cryogenic microcalorimeters and bolometers. One of the models is suitable to describe Transition Edge Sensor(TES) detectors with an integrated absorber, the other is suitable for detectors with large absorbers. Both models take into account hotelectron decoupling and absorber decoupling. The differential equations describing...

This work is concerned with the performance of a single degree of freedom electromagnetic energy harvester when subjected to a broadband white noise base acceleration. Firstly, using the Fokker-Planck-Kolmogorov equation, it is shown that Duffing-type nonlinearities can be used to reduce the size of energy harvesting devices without affecting their power output. This is then verified using the ...

This paper presents the design of a new four-stage ring oscillator with quadrature outputs using a 0.13μm CMOS 1P8M technology. The oscillator utilizes feed-forward technique and negative resistance to reduce the delay per stage and provides high frequencies. Employing single PMOS transistor to vary the load impedance allows reaching ultra-wide tuning range. The output frequency ranges from 0.8...

The paper deals with issues of modeling nonlinear electrical loads various types, such an uncontrolled rectifier, thyristor power regulator and mixed equivalent load. For these load existing analytical expressions were identified to determine the magnitudes harmonic currents, waveforms currents obtained during measurements in laboratory conditions variable parameters grid impedance results comp...