atomic clocks
Testing spatial α-variation with optical atomic clocks based on highly charged ions
... optical atomic clocks of exceptional accuracy and very high sensitivity to variation of the fine structure constant, ...ion clocks. Such clocks could allow us to corroborate astronomical ...
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Lasers, Cold Atoms and Atomic Clocks: Realizing the Second Today
... an atomic fountains is quite simultaneous with the realization of the very first Cesium beam ...as atomic fountain, even if Zacharias referred to as ...horizontal atomic beam configurations, ...
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An explanation of the Pioneer anomaly involving accelerated atomic clocks
... anomalous Pioneer shift. The concern raised in footnote 9 thus is, indeed, not critical. It might be of interest to consider as well the difference in the location of the spacecraft at that time. It is only 2300 m, ...
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Elementary cycles of time
... Abstract. Elementary particles, i.e. the basic constituents of nature, are characterized by quantum recurrences in time. The flow of time of every physical system can be there- fore decomposed in elementary cycles of ...
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Extended cosmology in Palatini f (R) theories
... dynamics, i.e. from the function f ( R ) which, hopefully, by choosing it accordingly, can be used to model dark matter and energy as eective sources. This is not the only eect in extended theories. Also the odd denition ...
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A Brief Note on the Clock Hypothesis
... The clocks in the original work are no further specified other than they are ideal, point-like ...relativistic clocks, either by experimentally confirming the hypothesis through detection of time-dilation ...
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Impact of Worm hole Attack in Wireless Sensor Network
... synchronized clocks, such that most of the difference between any two nodes’ clocks is! The value of the parameter! Must be known by all nodes in the network, and for temporal leashes, generally must be on ...
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On the Jefimenko’s Non Einsteinian Clocks and Synchronicity of Moving Clocks
... by Jefimenko [9], and as is clear from the calculations presented in this paper, the experiments that are interpreted as proofs of the reality of kinematic time dilation may have a simple alternative interpretation in ...
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Time travel, Clock Puzzles and Their Experimental Tests
... their atomic clocks, because of the combined clock effects of General and Special Relativity, are faster than those on the ground by approximately 39 microseconds per ...of clocks predicted by ...
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Wilken, Tobias (2010): Calibrating Astronomical Spectrographs with Frequency Combs. Dissertation, LMU München: Fakultät für Physik
... The most prominent examples are the development of atomic clocks, based on optical transitions [32, 33], the generation and control of attosecond pulses [34], the generation of ultra-low[r] ...
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Remote atomic clock synchronization via satellites and optical fibers
... International Atomic Time (TAI), atomic clocks and time scales are compared by means of the Global Positioning System (GPS) and by employing telecommu- nication satellites for two-way satellite time ...
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Compact atomic clock prototype based on coherent population trapping
... and atomic clocks [4-6]. Unlike vapor cell clocks as the widespread rubidium clocks, CPT clocks do not need microwave cavity, since the resonance interrogation is all-optical; the ...
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Biological clocks and physical functioning in monozygotic female twins
... The participants originate from two studies: 1) “Sarcopenia - Skeletal Muscle Adaptation to Postmenopausal Hypogonad- ism and Effects of Hormone Replacement Therapy and Physical Activity in Older Women: a Genetic and ...
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Chronodentistry: the role & potential of molecular clocks in oral medicine
... As part of evolution, the adaption to environmental changes contributes fundamentally to prevail in natural selection. Hence this ability is an important feature of a healthy organism. Teeth play a major role in ...
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Comparison of divide by 2 circuits for clocks used in mixers
... Many mixers in radio receivers use quadrature mixers with 25% duty cycle clock inputs with ideally no overlap. This thesis mainly focused on the divider which is used in the clock generation circuit capable of making ...
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Clocks and meals keep mice from being cool
... circadian clocks (Dibner et ...circadian clocks consist of transcription – translation feedback loops in which positive limb proteins (BMAL1, CLOCK and NPAS2) drive the expression of negative limb proteins ...
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DNA methylation aging clocks: challenges and recommendations
... methylation clocks” [21–25]. Subse- quently, these clocks were reported to capture aspects of biological aging and its associated morbidity and mortality ...
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Circadian organization in Japanese quail: Ocular clocks are pacemakers
... circadian clocks controlled local processes within the eye and input to the mammalian pacemaker in the SCN from the eye was limited to the relay of photic ...ocular clocks confer more than just photic input ...
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Biological clocks: their relevance to immune-allergic diseases
... both food intake and locomotor activity. Thus, the sleep– wake rhythm governed by sunlight indirectly drives food intake and body temperature cycles. However light and food can be uncoupled (e.g. in the case of jetlag or ...
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