The forward and inverse wavelet transform using the continuous Morlet basis may be symmetrized by using an appropriate normalization factor. The loss of response due to wavelet truncation is addressed through a renormalization of the wavelet based on power. The spectral density has physical units which may be related to the squared amplitude of the signal, as do its margins the mean wavelet pow...

An optical chlorophyll sensing system was developed to detect the chlorophyll content of bananas as the fruit ripens. This system shows a high correlation to other peel colour analysis methods (spectral analysis, tristimulus colorimeter analysis, and visual colour matching). Regression equations were developed to predict the chlorophyll content of banana peels, which is primarily responsible fo...

We propose a new method to analyse deformation of the cardiac left ventricular wall from tagging magnetic resonance images. The method exploits the fact that the time-dependent frequency covector field representing the tag pattern is tightly coupled to the myocardial deformation and not affected by tag fading. Deformation and strain tensor fields can be retrieved from local frequency estimates ...

The SiZer method is extended to nonparametric hazard estimation and also to censored density and hazard estimation. The new method allows quick, visual statistical inference about the important issue of statistically significant increases and decreases in the smooth curve estimate. This extension has required the opening of a new avenue of research on the interface between statistical inference...

In vitro antispermogenic activity of an isolated triterpenoid from the extract of the root of the plant Mangifera indica L. was evaluated. The structure (3-O-acetyl-11,19-dinor-12,20-dimethylursane) was confirmed by the help of different spectral analysis.

This paper presents a spectral analysis algorithm for monitoring the characteristics of the damped oscillating “modes” which are set up after a disturbance in an electric power distribution system. This monitoring is necessary so that one can detect early whether any modes are “inverse damped” (ie. exponentially growing), and hence likely to create instability in the power system. In this appli...