By James C. Lin
This finished and topical quantity offers a few major advances on many fronts during this quarter of analysis, fairly emphasizing present and destiny biomedical purposes of electromagnetic fields.
Read or Download Advances in Electromagnetic Fields in Living Systems: Volume 4 (Advances in Electromagnetic Fields in Living Systems) PDF
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Additional resources for Advances in Electromagnetic Fields in Living Systems: Volume 4 (Advances in Electromagnetic Fields in Living Systems)
Segments of two seconds are used in this R-peak detection algorithm. First, the median value of the largest peaks in the interval is computed and 65% of this value is used as a threshold. In the next step, the cardiac complexes are extracted from the ﬁltered signal. These complexes are used to construct a template of the cardiac complex. Using this template the signal is ﬁltered again and the template serves here as a matched ﬁlter. Using the algorithm described above, the events are again detected and a threshold of 65% of the median value is used again.
The range between these bounds decreases with increasing knowledge about the constituents of the composite medium. , 2001] σsolv (1 − p)5/3 ≤ σeff ≤ σsolv (1 − p)3/2 (8) As no measured values for the conductivity of the human fetus are available, its conductivity is estimated. It is assumed that the cells in the fetus are randomly orientated and have a shape somewhere between a sphere and a cylinder. Looking at the histology of the fetus, most tissues consist of elongated spheroids. D isc-like cells are less commonly encountered.
These observations led to the conclusion that due to the presence of the layer vernix caseosa in the period from the 28th –34th week, the fetal ECG is in general impossible to measure. In the period from the 34th week to term, the volume conduction is determined by preferred pathways. These conclusions are afﬁrmed by measurements carried out by Wakai et al. [2000b ], who measured both the fetal ECG and MCG in a case that the layer of vernix could not play a role. They performed measurements in weeks 28 and 31 of gestation on a fetus diagnosed with ectopia Fetal Magnetocardiography 27 Table 2.
Advances in Electromagnetic Fields in Living Systems: Volume 4 (Advances in Electromagnetic Fields in Living Systems) by James C. Lin