In the study of biological systems, it is often desirable to investigate causality between two simultaneously recorded signals. This paper suggests applying whitening filters to the signals and estimating their cross-correlation. The Cross-correlation sequence can be used to detect time lag between the signals. A positive lag can be interpreted as the reference signal causing the delayed signal...

Although there are several case reports of vital tooth bleaching in children, there is limited clinical trial evidence of the safety or efficacy of this practice. Accordingly, a new clinical trial was conducted to evaluate the effects of 2 different bleaching systems, a 6.5% hydrogen peroxide strip system and a 10% carbamide peroxide tray system, in a population of preteens and teens. A total o...

In our efforts to find new whitening agent materials, we focused on wood of Artocarpus heterophyllus which is anti melanogenesis. By activity-guided fractionation of A. heterophyllus wood extract, norartocarpetin and artocarpesin were isolated which inhibited both mushroom tyrosinase activity and melanin formation in B16 melanoma cells. This compound is a strong candidate as a remedy for hyperp...

It is well known that a discrete band-limited signal can be made broad-banded if we randomly permute its entries. In this paper, we study the efficacy of such spectral whitening procedure and its application to Sigma Delta quantization in Compressed Sensing. As a side result, we show that a similar whitening phenomenon can be observed in a broad class of non-Fourier orthogonal transformations.

Using whitening keys is a well understood mean of increasing the key-length of any given cipher. Especially as it is known ever since Grover’s seminal work that the effective key-length is reduced by a factor of two when considering quantum adversaries, it seems tempting to use this simple and elegant way of extending the key-length of a given cipher to increase the resistance against quantum a...

A 57-year-old female presented with facial oedema, cheilitis and stomatitis that started after three overnight applications of the ‘Evolution’TM home tooth-whitening kit. Her symptoms slowly resolved without treatment 3 days after she stopped using the product. The whitening kit includes an individualized plastic dental mould, which is prepared by the dentist, and a whitening gel, which contain...

This article investigates a theoretical basis for estimating autoregressive (AR) processes for linear-recurrent signals in convolutive mixtures. Whitening of such signals is sometimes a problem in multichannel blind equalization which is intended to extract the original signals even if the signals are of a convolutive mixture type. This whitening is due to inverse-filtering which deconvolves th...