COVID-19 is a novel coronavirus affecting all the world since December last year. Up to
date, the spread of the outbreak continues to complicate our lives, and therefore, several …

It is well known that life has evolved to use and generate light, for instance, photosynthesis,
vision and bioluminescence. What is less well known is that during normal metabolism, it …

The Industrial Age began its transition into the Information Age with the end of the Second
World War, which is probably as good a road sign as any other to mark its beginning, and …

We study the emission of photons from germinating seeds using an experimental technique
designed to detect light of extremely small intensity. We analyze the dark count signal …

Time series data are a crucial information source for various natural and societal processes.
Short time series can exhibit long-range correlations that reveal significant features not …

Skin aging is primarily associated with the alterations in dermal extracellular matrix, in
particular a decrease in collagen type-1 content. Recent studies have shown that collagen …

Objective A-phases are short-time cortical events during sleep that repeatedly disrupt the
basal fluctuations of electrical brain activity. They are the basic units of the cyclic alternating …

In this chapter, the present knowledge of chronobiological rhythms in spontaneous ultra-
weak photon emission (ie biological autoluminescence) from humans is summarized. The …

A considerable body of experimental research suggests that cells communicate using weak
optical signals. While the communication between biological systems through light is …

Exact estimation of Hurst exponent from a signal is a complex task that determines the
fractional character of the investigated sample. In this work, we propose a maximum …