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Measuring the T Wave of the Electrocardiogram; The How and Why

Publications associées (33)

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A time-domain recursive method to analyse transient wave propagation across rock joints

Jian Zhao

The present investigation is concerned with transient wave propagation in a rock mass with a set of parallel joints by using a recursive method. According to the displacement field of a rock mass with a set of parallel joints, the interaction between four ...

Blackwell Publishing Ltd, Oxford2012

Contextual modulation predicted by the N1 component of event-related potentials

Michael Herzog, Gijs Plomp, Vitaly Chicherov

Performance on a target can be strongly modified by context. For example, vernier offset discrimination is strongly deteriorated by neighboring flankers. Performance is worst when the flankers have the same length as the vernier. Surprisingly, performance ...

2012

The N1 wave amplitude reflects perceptual grouping and correlates with crowding

Michael Herzog, Gijs Plomp, Vitaly Chicherov

In crowding, flanking elements strongly deteriorate performance. For example, vernier offset discrimination is strongly affected by neighboring flankers. Performance is worst when the flankers have the same length as the vernier. Surprisingly, performance ...

Association for Research in Vision and Ophthalmology2012

Validation study of the distinct lattice spring model (DLSM) on P-wave propagation across multiple parallel joints

Jian Zhao, Gaofeng Zhao, Jianbo Zhu

A validation study of the distinct lattice spring model (DLSM) for wave propagation problems is performed. DLSM is a microstructure-based numerical model, which is meshless and has advantages in modelling dynamic problems where stress wave propagation is i ...

Elsevier2011

Analysis of stochastic seismic wave interaction with a slippery rock fault

Jian Zhao

Stochastic seismic wave interaction with a slippery rock fault is studied, based on the principle of conservation of momentum at the wave fronts along the fault. By using the displacement discontinuity method, the wave propagation equations are derived for ...

Springer Verlag2011

Effects of wave forcing on a subterranean estuary

David Andrew Barry, Roham Bakhtyar, Clare Robinson

Wave and tide are important forcing factors that typically co-exist in coastal environments. A numerical study was conducted to investigate individual and combined effects of these forces on flow and mixing processes in a near-shore subterranean estuary. A ...

American Geophysical Union2010

Joints are important mechanical and hydrological features of rock masses, and they can greatly affect wave propagation and attenuation across jointed rock masses. Joints often contain liquid, and the presence of liquid will change the mechanical behaviors ...

Crc Press-Taylor & Francis Group, 6000 Broken Sound Parkway Nw, Ste 300, Boca Raton, Fl 33487-2742 Usa2010

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A measurement technique using flexible PVDF gages for characterizing the propagation of pressure waves in biological tissues is developed. We demonstrated that experimental measurements, coupled with numerical simulations, represent a promising method to o ...

E D P Sciences, 17 Ave Du Hoggar Parc D Activites Countboeuf Bp 112, F-91944 Cedex A, France2009

Application of the fastest route algorithm in the interactive simulation of the effect of local ischemia on the ECG

A method is described to determine the effect on the ECG of a reduced propagation velocity within an ischemic zone. The method was designed to change the activation sequence throughout the ventricles interactively, i.e. with a response time in the order of ...

2009

Time-resolved x-ray diffraction study of laser-induced shock and acoustic waves in single crystalline silicon

A rod of single crystalline silicon has been subjected to high-power nanosecond laser pulses inducing ultrasonic and shock waves traveling into the bulk of the material. Stroboscopic time-resolved high-energy x-ray diffraction measurements were carried out ...

2009