A Fermi-degenerate three-dimensional optical lattice clock [PDF]
Science, 2017 Making a denser optical lattice clock Some of today's most advanced clocks are made up of large numbers of atoms lined up in a one-dimensional (1D) optical lattice. The numbers improve clock stability, but atomic interactions can limit accuracy. Campbell
A. Goban +7 more
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A balance of positive and negative regulators determines the pace of the segmentation clock
eLife, 2015 Somitogenesis is regulated by a molecular oscillator that drives dynamic gene expression within the pre-somitic mesoderm. Previous mathematical models of the somitogenesis clock that invoke the mechanism of delayed negative feedback predict that its ...
Guy Wiedermann +5 more
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Evaluating Circadian Dysfunction in Mouse Models of Alzheimer’s Disease: Where Do We Stand?
Frontiers in Neuroscience, 2020 Circadian dysfunction has been described in patients with symptomatic Alzheimer’s disease (AD), as well as in presymptomatic phases of the disease. Modeling this circadian dysfunction in mouse models would provide an optimal platform for understanding ...
Patrick W. Sheehan +2 more
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Du temps compté au temps vécu à l’époque baroque
Recherches, 2021 The archetypal Oedipal conflict of generations is immemorial: latent with the pandemic and the controversy about who gets priority for vaccination (the old over the young), it becomes obvious at the turn of the 16th and 17th centuries, when the discovery
Benito Pelegrín
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Collisional losses, decoherence, and frequency shifts in optical lattice clocks with bosons
, 2009 We have quantified collisional losses, decoherence and the collision shift in a one-dimensional optical lattice clock with bosonic 88Sr. The lattice clock is referenced to the highly forbidden transition 1S0 - 3P0 at 698 nm, which becomes weakly allowed ...
Lisdat, Ch. +4 more
core +1 more source
Light exposure during development affects physiology of adults in Drosophila melanogaster
Frontiers in Physiology, 2022 Light is one of most important factors synchronizing organisms to day/night cycles in the environment. In Drosophila it is received through compound eyes, Hofbauer-Buchner eyelet, ocelli, using phospholipase C-dependent phototransduction and by deep ...
Milena Damulewicz +2 more
doaj +1 more source
System clock estimation based on clock wastage minimization [PDF]
, 1991 When synthesizing a hardware implementation from behavioral descriptions, an important decision is the selection of a clock cycle to schedule the datapath operations into control steps.
Gajski, Daniel D., Narayan, Sanjiv
core
Dependence of the time-reading process of the Salecker--Wigner quantum clock on the size of the clock [PDF]
, 2015 It is shown in the present note that the degree of the complexity of the time-reading process of the Salecker--Wigner clock depends on the size of the clock. This dependence leads to a relation between the size and the accuracy of the clock, and suggests
Frenkel, Andor
core +2 more sources
Molecular mechanism of the repressive phase of the mammalian circadian clock
Proceedings of the National Academy of Sciences of the United States of America, 2020 Significance The circadian clock mechanism is a daily rhythmic activation of circadian gene transcription by the CLOCK–BMAL1 heterodimer and repression by CRYs (CRY1 and CRY2) and PERs (PER1 and PER2).
Xuemei Cao +4 more
semanticscholar +1 more source
Circadian Clock Genes and the Transcriptional Architecture of the Clock Mechanism.
Journal of Molecular Endocrinology, 2018 The mammalian circadian clock has evolved as an adaptation to the 24-hour light/dark cycle on earth. Maintaining cellular activities in synchrony with the activities of the organism (such as eating and sleeping) helps different tissue and organ systems ...
K. H. Cox, J. Takahashi
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