The development of an international atomic time scale

Barnes, James A.

doi:10.1109/proc.1967.5695

Cited by 5 publications

References 11 publications

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Malaria Diagnosis and the Plasmodium Life Cycle: the BFO Perspective

Ceusters¹,

Smith²

2010

Nat Prec

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Definitive diagnosis of malaria requires the demonstration through laboratory tests of the presence within the patient of malaria parasites or their components. Since malaria parasites can be present even in the absence of malaria manifestations, and since symptoms of malaria can be manifested even in the absence of malaria parasites, malaria diagnosis raises important issues for the adequate understanding of disease, etiology and diagnosis. One approach to the resolution of these issues adopts a realist view, according to which the needed clarifications will be derived from a careful representation of the entities on the side of the patient which form the ultimate truthmakers for clinical statements. We here address a challenge to this realist approach relating to the diagnosis of malaria, and show how this challenge can be resolved by appeal to Basic Formal Ontology (BFO) and to the Ontology for General Medical Science (OGMS) constructed in its terms.

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Malaria Diagnosis and the Plasmodium Life Cycle: the BFO Perspective

Ceusters¹,

Smith²

2010

Nat Prec

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Calculation of Unbiased Clock-Variances in Uncalibrated Atomic Time Scale Algorithms

Yoshimura¹

1980

Metrologia

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We discuss the biased frequency variances or weights of clocks estimated from clock data referred to the ensemble time which is determined from an ensemble of the clocks without using a primary frequency standard, and show a calculation method to obtain the unbiased variances or weights by compensating for the biased variances. The method uses an atomic time scale algorithm based on a simply weighted average over the ensemble clocks, used only for the unbiased-variance calculation. Effects of frequency drifts on the calculation and weight corrections on an atomic time scale are also discussed. By computer simulations which use mixed processes of white-noise FM and flicker-noise FM the great effectiveness of the unbiased variance calculation is shown. An example of a time scale using six clock models are also shown by the simulation with an algorithm based on the timeerror prediction for each clock between intervals without using a primary standard, in which the unbiased weights are adopted.. N w1 = [.z: 1=1 1/u,2(7)i]-l/uy2(7)i

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Clock Error Statistics as a Renewal Process

Barnes

1968

22nd Annual Symposium on Frequency Control

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The development of an international atomic time scale

Cited by 5 publications

References 11 publications

Malaria Diagnosis and the Plasmodium Life Cycle: the BFO Perspective

Malaria Diagnosis and the Plasmodium Life Cycle: the BFO Perspective

Calculation of Unbiased Clock-Variances in Uncalibrated Atomic Time Scale Algorithms

Clock Error Statistics as a Renewal Process

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