Results 11 to 20 of about 1,324,164 (376)
Is the diatom sex clock a clock? [PDF]
Journal of The Royal Society Interface, 2021 The unique life cycle of diatoms with continuous decreasing and restoration of the cell size leads to periodic fluctuations in cell size distribution and has been regarded as a multi-annual clock. To understand the long-term behaviour of a population analytically, generic mathematical models are investigated algebraically and numerically for their ...
Fuhrmann-Lieker, Thomas +4 more
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Differential clock comparisons with a multiplexed optical lattice clock [PDF]
Nature, 2021 Rapid progress in optical atomic clock performance has advanced the frontiers of timekeeping, metrology and quantum science1–3. Despite considerable efforts, the instabilities of most optical clocks remain limited by the local oscillator rather than the ...
Xin Zheng +5 more
semanticscholar +1 more source
Science, 2016 Our bodies' internal timepieces drive daily rhythms and influence ...
John Travis, L. Bryan Ray
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On the clock of the combinatorial clock auction [PDF]
Theoretical Economics, 2016 The combinatorial clock auction (CCA) has frequently been used in recent spectrum auctions. It combines a dynamic clock phase and a one‐off supplementary round. The winning allocation and the corresponding prices are determined by the Vickrey–Clarke–Groves rules.
Bernhard Kasberger +3 more
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Circadian Biology: Clocks within Clocks [PDF]
Current Biology, 2005 A small cluster of approximately 20,000 neurons in the ventral hypothalamus provide the body with key time-keeping signals and drive circadian rhythms. This circadian clock exhibits surprisingly complex substructures, with inputs from the retina, and outputs to other brain structures.
Piggins, Hugh D., Loudon, Andrew
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PLOS Biology, 2015 Circadian rhythms are an essential property of life on Earth. In mammals, these rhythms are coordinated by a small set of neurons, located in the suprachiasmatic nuclei (SCN). The environmental light/dark cycle synchronizes (entrains) the SCN via a distinct pathway, originating in a subset of photosensitive retinal ganglion cells (pRGCs) that utilize ...
Diepen, H.C. van +2 more
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Atmospheric Chemistry and Physics, 2013 Abstract. Cumulus clouds exhibit a life cycle that consists of (a) the growth phase (increasing size, most notably in the vertical direction); (b) the mature phase (growth ceases; any precipitation that develops is strongest during this period); and (c) the dissipation phase (cloud dissipates because of precipitation and/or entrainment; no more ...
M. K. Witte, P. Y. Chuang, G. Feingold
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Demonstration of a trapped-ion atomic clock in space
Nature, 2021 Atomic clocks, which lock the frequency of an oscillator to the extremely stable quantized energy levels of atoms, are essential for navigation applications such as deep space exploration1 and global navigation satellite systems2, and are useful tools ...
E. Burt +9 more
semanticscholar +1 more source
Neuron, 2013 Although circadian clocks normally run with a 24 hr period, Brancaccio et al. (2013) report in this issue of Neuron that transiently activating G protein signaling can lengthen period even after the stimulus is removed, revealing an unexpected plasticity in the central brain clock.
Ben Collins, Justin Blau
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