Results 61 to 70 of about 5,543,577 (334)
PhotonicsHigh-precision time–frequency is widely used in time measurement, satellite navigation, scientific research, and other fields. With the rapid development of optical clock technology, the fractional frequency instability and uncertainty of optical clock ...
Guoyong Wang +5 more
doaj +1 more source
Overview of free-piston Stirling technology at the NASA Lewis Research Center [PDF]
, 1985 An overview of the National Aeronautics and Space Administration (NASA) Lewis Research Center (Lewis) free-piston Stirling engine activities is presented.
Slaby, J. G.
core +1 more source
The role and implications of mammalian cellular circadian entrainment
FEBS Letters, EarlyView.At their most fundamental level, mammalian circadian rhythms occur inside every individual cell. To tell the correct time, cells must align (or ‘entrain’) their circadian rhythm to the external environment. In this review, we highlight how cells entrain to the major circadian cues of light, feeding and temperature, and the implications this has for our
Priya Crosby
wiley +1 more source
Advances and Prospects of Free Space Optical Communication in Space Applications [PDF]
علوم، فناوری و کاربردهای فضاییThis research aims to investigate the emerging technology of free-space optical communication and its applications in the space industry. By employing light beams as information carriers, this technology offers significantly higher bandwidth and enhanced
Javad Haghshenas
doaj +1 more source
Urban Free-Space Optical Network Optimization
Applied Sciences, 2020 This paper presents a set of graph optimization problems related to free-space optical communication networks. Such laser-based wireless networks require a line of sight to enable communication, thus a visibility graph model is used herein.
Revital Marbel +2 more
doaj +1 more source
FEBS Letters, EarlyView.This perspective highlights emerging insights into how the circadian transcription factor CLOCK:BMAL1 regulates chromatin architecture, cooperates with other transcription factors, and coordinates enhancer dynamics. We propose an updated framework for how circadian transcription factors operate within dynamic and multifactorial chromatin landscapes ...
Xinyu Y. Nie, Jerome S. Menet
wiley +1 more source
Function‐driven design of a surrogate interleukin‐2 receptor ligand
FEBS Letters, EarlyView.Interleukin (IL)‐2 signaling can be achieved and precisely fine‐tuned through the affinity, distance, and orientation of the heterodimeric receptors with their ligands. We designed a biased IL‐2 surrogate ligand that selectively promotes effector T and natural killer cell activation and differentiation. Interleukin (IL) receptors play a pivotal role in
Ziwei Tang +9 more
wiley +1 more source
Towards metropolitan free-space quantum networks
npj Quantum Information, 2023 Quantum communication has seen rapid progress towards practical large-scale networks, with quantum key distribution (QKD) spearheading this development.
Andrej Kržič +20 more
doaj +1 more source
Capturing Logarithmic Space and Polynomial Time on Chordal Claw-Free Graphs
, 2019 We show that the class of chordal claw-free graphs admits LREC$_=$-definable canonization. LREC$_=$ is a logic that extends first-order logic with counting by an operator that allows it to formalize a limited form of recursion.
Grußien, Berit
core +1 more source
Mechanisms of parasite‐mediated disruption of brain vessels
FEBS Letters, EarlyView.Parasites can affect the blood vessels of the brain, often causing serious neurological problems. This review explains how different parasites interact with and disrupt these vessels, what this means for brain health, and why these processes matter. Understanding these mechanisms may help us develop better ways to prevent or treat brain infections in ...
Leonor Loira +3 more
wiley +1 more source