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When I analyzed the entire data set of 163 points using the standard, weighted, linear least squares method, the decay of c was determined to be: decay of c = 0.0000140 ± 0.0000596 km/s/year.
This result says pretty plainly that there is no discernible decay trend in the data set presented by Norman and Setterfield.
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Introduction In a recently published technical report entitled, The Atomic Constants, Light, and Time, Trevor Norman and Barry Setterfield put forward their most recent evidence in favor of the hypothesis that the speed of light, c, has been decreasing in the past.
The range of uncertainty was not reported for many of the earliest measurements, so some of the data points are plotted without error bars.
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The Data Though an objective analysis of the data does not reveal any overall decay trend, the one-sidedness of the data before 1800 seems odd.
In this regard, there are some peculiarities in Norman and Setterfield's selection of data of which the reader needs to be aware.
The relatively few data points between 18 which have very large error bars, result from two indirect methods of measuring c, which inherently yield low-precision results.
In a non-weighted least squares fit, every data point has equal weight in determining where the best fit straight line should be drawn through the data.Structured Ph D programmes, for example, often have a strong international orientation with English as the team language.Roughly 30,000 graduate students complete a doctorate in Germany every year – far more than in any other European country.This hypothesis has received much acclaim in some sectors of the creationist community since its initial introduction by Barry Setterfield a few years ago.