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This paper presents contributions on respiratory impedance and its phase constancy effects at high frequencies; i.e. 7.5-247.5 Hz. Measurements of 14 healthy volunteers are used to provide the input impedance values. It is shown, via the modulus-phase characteristics, that the impedance poses a typical frequency-independent behavior, known as phase constancy. We propose an electrical ladder network...
This study presents a new method for the estimation of the dynamic impedance of multi-joint leg movements. The method is based on Multi Input Multi Output (MIMO) system identification techniques and is designed for continuous torque perturbations at the hip and knee joint. Preliminary results from this study indicate that MIMO system identification can successfully be used to estimate the hip and...
Human body shape, called somatotype, has described physique of humans in health and sports applications, relating anthropometric measurements to fatness, muscularity and linearity in a structured way. Here we propose a new method based on bioelectric impedance vector analysis (BIVA) of R/H and Xc/H to represent the cross-sectional area and the body cell mass in a given surface area (m<;;sup>2<;;/sup>)...
Mechanical impedance is a complex number and a system's property. Impedance of human arm is the control variable when the central nervous system coordinates a motion. This research proposes a new method for measuring the mechanical impedance as a complex number. Impedance is measured at the hand point while sinusoidal perturbation is applied. That helps extracting the real and imaginary part of the...
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