As any new mother knows, getting a baby to sleep at night is an art, and perhaps using snippets from Shakespeares Hamlet may help. But the science of how babies sleep – and what their processes may have in common with their adult counterparts – could be a small step closer to being better understood.
Sleep shows dramatic changes across early development. Quiet sleep (also known as non-rapid eye movement sleep [QS/NREMS]) increases in the course of the first year of life while active sleep or rapid eye movement sleep (AS/REMS) decreases. Slow wave sleep becomes predominant in the first part of the night beginning at about two months of age. In the last 30 years, researchers have increased their knowledge about the quantitative characteristics of the sleep EEG (electroencephalogram) during development, but how sleep regulation develops in early life was not a focus of their work. Accordingly, a new study of human infants has been conducted to document changes of the sleep EEG, with a particular focus on those facets that are markers of the sleep process in adults. The results suggest that EEG markers of sleep homeostasis appear in the first postnatal months and that sleep homeostasis goes through a period of maturation.
A New Study
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Physicists of the University of Würzburg have made an astonishing discovery in a specific type of topological insulators. The effect is due to the structure of the materials used. The researchers have now published their work in the journal Science.
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In recent years, lasers with ultrashort pulses (USP) down to the femtosecond range have become established on an industrial scale. They could advance some applications with the much-lauded “cold ablation” – if that meant they would then achieve more throughput. A new generation of process engineering that will address this issue in particular will be discussed at the “4th UKP Workshop – Ultrafast Laser Technology” in April 2017.
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In experiments with magnetic atoms conducted at extremely low temperatures, scientists have demonstrated a unique phase of matter: The atoms form a new type of quantum liquid or quantum droplet state. These so called quantum droplets may preserve their form in absence of external confinement because of quantum effects. The joint team of experimental physicists from Innsbruck and theoretical physicists from Hannover report on their findings in the journal Physical Review X.
“Our Quantum droplets are in the gas phase but they still drop like a rock,” explains experimental physicist Francesca Ferlaino when talking about the...
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