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Metrologia, 1971
Techniques of construction of atomic time scales are discussed and experiments at the National Research Council using a group of commercial cesium standards and the NRC 2.1 m laboratory cesium standard, Cs III, are described. Time scales based on the multiple standard approach are compared with the scale UTA (NRC) resulting from the periodic ...
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Techniques of construction of atomic time scales are discussed and experiments at the National Research Council using a group of commercial cesium standards and the NRC 2.1 m laboratory cesium standard, Cs III, are described. Time scales based on the multiple standard approach are compared with the scale UTA (NRC) resulting from the periodic ...
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Proceedings of the International School of Physics “Enrico Fermi”, 2006
The definitions of time scales and the current international reference for timekeeping are described pointing out the main strengths of the system. The main application of timekeeping and time metrology, the Global Satellite Navigation Systems, are also introduced.
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The definitions of time scales and the current international reference for timekeeping are described pointing out the main strengths of the system. The main application of timekeeping and time metrology, the Global Satellite Navigation Systems, are also introduced.
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Time-Frequency/Time-Scale Reassignment
2003This chapter reviews the reassignment principle, which aims at “sharpening” time-frequency and time-scale representations in order to improve their readability.
Chassande-Mottin, E. +2 more
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Proceedings of the 17th international conference on World Wide Web, 2008
The World Wide Web Consortium's RDF standard primarily consists of (subject, property, object) triples that specify the value that a given subject has for a given property. However, it is frequently the case that even for a fixed subject and property, the value varies with time.
PUGLIESE, Andrea +2 more
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The World Wide Web Consortium's RDF standard primarily consists of (subject, property, object) triples that specify the value that a given subject has for a given property. However, it is frequently the case that even for a fixed subject and property, the value varies with time.
PUGLIESE, Andrea +2 more
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Biological Cybernetics, 1988
A conceptually simple and logically consistent version of ``scale-space'' for the temporal domain is proposed. The method does not violate temporal causality, yet conserves causality in the resolution domain at any given moment in time. The filter kernels are not Gaussians (that would certainly lead to a violation of temporal causality) but are related
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A conceptually simple and logically consistent version of ``scale-space'' for the temporal domain is proposed. The method does not violate temporal causality, yet conserves causality in the resolution domain at any given moment in time. The filter kernels are not Gaussians (that would certainly lead to a violation of temporal causality) but are related
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IEEE Transactions on Instrumentation and Measurement, 1972
The International Atomic Time (IAT) is a mean of local independent atomic time scales. The current procedure uses an algorithm ensuring the long-term stability, with fixed weights roughly proportional to the number of operating cesium standards. We found that the scale unit of IAT varied by probably less than 2 × 10-13 in relative value between January
Bernard Guinot, Michel Granveaud
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The International Atomic Time (IAT) is a mean of local independent atomic time scales. The current procedure uses an algorithm ensuring the long-term stability, with fixed weights roughly proportional to the number of operating cesium standards. We found that the scale unit of IAT varied by probably less than 2 × 10-13 in relative value between January
Bernard Guinot, Michel Granveaud
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Alternative time scales and failure time models.
Lifetime data analysis, 2000In many reliability applications, there may not be a unique plausible scale in which to measure time to failure or assess performance. This is especially the case when several measures of usage are available on each unit. For example, the age, the total number of flight hours, and the number of landings are usage measures that are often considered ...
Duchesne, Thierry, Lawless, Jerry
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Metrologia, 1995
An application of atomic frequency standards is the establishment of atomic time scales. International Atomic Time is the official basis by which events are dated. However, the need to distinguish between theoretical times and their realizations, the need for a relativistic treatment and the survival of previous astronomical times generate a complex ...
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An application of atomic frequency standards is the establishment of atomic time scales. International Atomic Time is the official basis by which events are dated. However, the need to distinguish between theoretical times and their realizations, the need for a relativistic treatment and the survival of previous astronomical times generate a complex ...
openaire +1 more source