Acceleration and Clocks
نویسندگان
چکیده
منابع مشابه
The Pioneer anomaly as acceleration of the clocks
This work proposes an explanation of the Pioneer anomaly, the unmodelled and as yet unexplained blueshift detected in the microwave signal of the Pioneer 10 and other spaceships by Anderson et al in 1998. What they observed is similar to the effect that would have either (i) an anomalous acceleration aP of the ship towards the Sun or (ii) an acceleration of the clocks at = aP/c. The second alte...
متن کاملCircadian Biology: Clocks within Clocks
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. Rather little is known of the neurotransmitters involved, or their regulation.
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متن کاملClocks within clocks: timing by coincidence detection
The many existent models of timing rely on vastly different mechanisms to track temporal information. Here we examine these differences, and identify coincidence detection in its most general form as a common mechanism that many apparently different timing models share, as well as a common mechanism of biological circadian, millisecond and interval timing. This view predicts that timing by coin...
متن کاملFeeding and circadian clocks.
The mammalian genome encodes at least a dozen of genes directly involved in the regulation of the feedback loops constituting the circadian clock. The circadian system is built up on a multitude of oscillators organized according to a hierarchical model in which neurons of the suprachiasmatic nuclei of the hypothalamus may drive the central circadian clock and all the other somatic cells may po...
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ژورنال
عنوان ژورنال: Science
سال: 2003
ISSN: 0036-8075,1095-9203
DOI: 10.1126/science.191.4226.489