Evaluation of Respiratory Impedance in Asthma and COPD by an Impulse Oscillation System
Internal Medicine, 2010 The purpose of this study was to clarify the differences in physiological properties of the airways between asthma and COPD using an impulse oscillation system (IOS).Subjects comprised 95 stable COPD patients, 52 never-smoker asthma patients and 29 healthy never-smokers >60 years old, all matched for age, in whom respiratory impedance was examined by ...
Kanda, Shintarou +5 more
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Analytical Expression for Sound Transmission Loss Calculation: An Improvement to the Existing Method after Singh and Katra [PDF]
, 2009 An analytical expression for measuring of sound transmission loss (TL) has been developed by using two microphones, an impedance tube and an impulse sound source as a proposed improvement to the existing procedure after Singh and Katra (1978).
Yahya, Iwan
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Impulse Characteristics of Various Soil-Enhancement Material Mixtures
Applied SciencesMany studies have demonstrated that a reduction in ground impedance value occurs under high-impulse current magnitudes, due to the ionisation process in soil.
Fazlul Aman +3 more
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A Study on Frequency Response Functions in Pavement Engineering
The Baltic Journal of Road and Bridge Engineering, 2023 Mechanical impedance (MI) defines the ability of a system to vibrate as a consequence of force application. In the recent years, the correlation of this parameter with tire-road noise and other characteristics has gained certain attention.
Filippo G. Pratico +3 more
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Pseudomonas aeruginosa can be detected in a polymicrobial competition model using impedance spectroscopy with a novel biosensor [PDF]
, 2014 Electrochemical Impedance Spectroscopy (EIS) is a powerful technique that can be used to elicit information about an electrode interface. In this article, we highlight six principal processes by which the presence of microorganisms can affect impedance ...
Tucker, Nicholas P +2 more
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Parameter Estimation of a Grid-Tied Inverter Using In Situ Pseudo-Random Perturbation Sources
Energies, 2023 Inverters are playing an increasingly important role in the electrical utility grid due to the proliferation of renewable energy sources. Obtaining inverter models with accurate parameters is, therefore, essential for grid studies and design.
Ian Paul Gerber +2 more
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Measurement of impulse noise propagation over natural impedance surfaces [PDF]
The Journal of the Acoustical Society of America, 1985 The peak sound pressure level decay with distance of the impulse noise from hand grenade simulators has been measured over the following types of surfaces: water, swamp, rocky ground with small bushes, dead grass with sparse snow cover, and dense evergreen forest. The ground impedance is estimated for each surface using the calculation of R. Raspet. H.
Nelson Lewis, Richard Raspet
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Reference values for respiratory system impedance using impulse oscillometry in healthy preschool children [PDF]
Korean Journal of Pediatrics, 2011 PurposeThe normal values for lung resistance and lung capacity of children, as determined by impulse oscillometry (IOS), are different for children of different ethnicities.
Jye Hae Park +8 more
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Preliminary work on the detection of partial discharges in SF6 under impulse voltages [PDF]
, 1997 This paper presents preliminary results of an investigation into the detection of partial discharges on the rise of impulse voltages from a point-to-plane gap in SF6. A parallel RC detection impedance is placed in the earth path of a point.
Reynders, Jan P., Nielsen, Shawn D.
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Physical Review Special Topics. Accelerators and Beams, 2008 The transverse turn-by-turn evolution of a bunch slice after an impulse kick is examined considering chromatic and impedance effects. It is found that by fitting the envelope of the beam slice motion to simulated data the strength of the resistive wall ...
V. H. Ranjbar, P. Ivanov
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