Results 81 to 90 of about 529,740 (187)

Interpretation of Partial-Discharge-Activated Frequency Response Analysis for Transformer Diagnostics

open access: yesMachines
This paper introduces a novel diagnostic approach called partial-discharge-activated impulse frequency response analysis (PD-IFRA), developed to overcome the limitations of conventional frequency response analysis (FRA) in detecting partial discharges ...
Bonginkosi A. Thango
doaj   +1 more source

Discrepancy between airwave and impulse oscillometry measurements of impedance in healthy children

open access: yesPediatric Pulmonology
Introduction: Respiratory oscillometry (OSC) is a pulmonary function test that measures respiratory system impedance and is well-suited for young children. Previous studies have suggested that there may be differences between impedance values obtained on different instruments, however, no studies comparing ...
Heather Boas   +11 more
openaire   +1 more source

Determining acoustical directionality in an impedance tube using multiple fixed microphones [PDF]

open access: yes, 2011
Acoustic impedance of a port or object is a valuable piece of knowledge describing how well sound is transmitted or reflected. The commonly used slotted-line method is labourious and time consuming, requiring manual movement to find the maxima and minima
Scott, Jonathan B.   +2 more
core  

The site of airway obstruction among patients of emphysema: Role of impulse oscillometry

open access: yesLung India, 2008
Objectives: To detect the site of airway obstruction in patients of emphysema by impulse oscillometry (IOS) and to compare its observatios with flow volume loop (FV loop) studies.
Hira H   +4 more
doaj  

To Buy Or Not To Buy? A Behavioural Approach to Examine Consumer Impulse Buying Choice in Various Situations [PDF]

open access: yes, 2013
Impulse buying is a phenomenon that has attracted attention from marketers and consumer researchers for decades. Whilst impulse buying has been studied extensively, there is a gap in our understanding of consumer impulse buying ...
MA, WEI,CHEN
core  

Lightning Impulse Ageing of HV Cable Insulation

open access: yes, 2009
Lightning impulses can lead to accelerated ageing of extruded cables. Electrical behaviour of a dielectric material when experiencing a lightning impulse is different to that for DC or power frequency applied voltages.
Dao, N L, Swingler, S G, Lewin, P L
core   +1 more source

Multifrequency methods for Electrical Impedance Tomography [PDF]

open access: yes, 2015
Multifrequency Electrical Impedance Tomography (MFEIT) is an emerging imaging modality which exploits the dependence of tissue impedance on frequency to recover images of conductivity.
Malone, ER
core  

On the Passivity Based Impedance Control of Flexible Joint Robots [PDF]

open access: yes, 2007
In this work a novel type of impedance controllers for flexible joint robots is proposed. As a target impedance a desired stiffness and damping are considered without inertia shaping.
Hirzinger, Gerd   +3 more
core  

Experimental Study on Lightning Transient Overvoltage Damage of Interface Devices of High-speed Railway Signal Equipment

open access: yes工程科学与技术
This article proposes a method for detecting and determining the lightning overvoltage damage in communication interfaces of high-speed railway signal equipment, which is an optimization and improvement of the current lightning test and detection methods
Zhoulong WANG   +3 more
doaj  

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