Results 81 to 90 of about 55,411 (278)

The futuristic manifolds of REM sleep

Journal of Sleep Research, Volume 34, Issue 2, April 2025.
Summary Since one of its first descriptions 70 years ago, rapid eye movement sleep has continually inspired and excited new generations of sleep researchers. Despite significant advancements in understanding its neurocircuitry, underlying mechanisms and microstates, many questions regarding its function, especially beyond the early neurodevelopment ...
Liborio Parrino, Ivana Rosenzweig
wiley   +1 more source

Investigation on the Band Gap and Negative Properties of Concentric Ring Acoustic Metamaterial

Shock and Vibration, 2018
The acoustic characteristics of 2D single-oscillator, dual-oscillator, and triple-oscillator acoustic metamaterials were investigated based on concentric ring structures using the finite element method.
Meng Chen, Dan Meng, Heng Jiang, Yuren Wang   +3 more
doaj   +1 more source

SARS‐CoV‐2 and hypertension

Physiological Reports, 2021
The objective of this review is to give an overview of the pathophysiological effects of the Coronavirus Disease 2019 (COVID‐19) in relation to hypertension (HT), with a focus on the Renin–Angiotensin–Aldosterone System (RAAS) and the MAS receptor. HT is
Briyanth Ravichandran, Daniela Grimm, Marcus Krüger, Sascha Kopp, Manfred Infanger, Markus Wehland   +5 more
doaj   +1 more source

Is sleep affected after microgravity and hypergravity exposure? A pilot study

Journal of Sleep Research, Volume 34, Issue 2, April 2025.
Summary Sleep is known to be affected in space travel and in residents of the international space station. But little is known about the direct effects of gravity changes on sleep, if other factors, such as sleep conditions, are kept constant. Here, as a first exploration, we investigated sleep before and after exposure to short bouts of microgravity ...
Barbara Le Roy, Aurore Jouvencel, Anika Friedl‐Werner, Ludmila Renel, Youcef Cherchali, Raouf Osseiran, Ernesto Sanz‐Arigita, Jean‐René Cazalets, Etienne Guillaud, Ellemarije Altena   +9 more
wiley   +1 more source

A Review of Pool Boiling in Superfluid Helium under Microgravity Condition

This review is intended to summarize the status and the open issues in the studies of boiling in saturated superfluid helium under microgravity condition.
TAKADA, Suguru
core   +1 more source

The effect of bed rest, unilateral limb immobilization and head‐down tilt on muscle protein synthesis: A systematic review and meta‐analysis

Experimental Physiology, EarlyView.
Abstract Muscle disuse leads to muscle atrophy and a decrease in muscle function that is primarily driven by reduced muscle protein synthesis (MPS). The aim of this systematic review and meta‐analysis was to examine the effect of different models of muscle disuse on rates of MPS.
Konstantinos Prokopidis, Paul T. Morgan, Colleen S. Deane, Oliver C. Witard, David D. Church   +4 more
wiley   +1 more source

Parameter Design for Inter-Satellite Laser Link Acquisition Under Weak Light Conditions

Remote Sensing
For the Taiji program or other LISA-like space-based gravitational wave (GW) detection missions, establishing laser links is a prerequisite for entering the normal science mode.
Mengyang Zhao, Jia Shen, Juan Wang, Pan Li, Ruihong Gao, Ziren Luo   +5 more
doaj   +1 more source

Spatiotemporal Intermittency in Pulsatile Pipe Flow

Entropy, 2020
Despite its importance in cardiovascular diseases and engineering applications, turbulence in pulsatile pipe flow remains little comprehended. Important advances have been made in the recent years in understanding the transition to turbulence in such ...
Daniel Feldmann, Daniel Morón, Marc Avila   +2 more
doaj   +1 more source

Acoustic Flame Suppression Mechanics in a Microgravity Environment [PDF]

, 2015
The following paper deals with acoustic flame suppression mechanics in a microgravity environment with measurements taken from an Arduino-based sensor system and validation of the technique. A Zippo lighter is ignited in microgravity and then displaced
Yue, Kwok-Bun
core   +1 more source

Seismic characterization of the subsurface and anthropogenic noise at the LUNA Moon analog facility

Seismica
The increased interest in crewed and robotic lunar exploration results in a need for high-quality testbeds for instruments, experiments-including seismological ones-and procedures, and for operations training.
Brigitte Knapmeyer-Endrun, Martin Knapmeyer, Olav Cornelius, Hans-Herbert Fischer, Maria Hallinger, Cinzia Fantinati, Oliver Küchemann, Michael Maibaum   +7 more
doaj   +1 more source