Tag Archives: sunspots

The Historical Process – Cycles of War

(originally posted 17/05/07 on Wobbly Universe blog by Ray Tomes) In the early 1900s, Alexander Chizhevsky (sometimes spelled Tchijevsky or various other ways) made very comprehensive investigations in historical processes, especially wars, to try and determine the causes of the … Continue reading

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Sunspot Number reconstruction by Leif Svalgaard and proxy cycles of 104 and 208 years

In an article on WUWT, “Solar Activity – Past, Present, Future“, Leif Svalgaard describes the problems of historical sunspot records because of changes in instrumentation and observers. He produces a new series which attempts to correct for the various problems. He … Continue reading

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The Lambda Function

Several papers by Stephen J Taylor and Brian G Kingsma, “Non-stationarity in Sugar Prices” http://www.jstor.org/pss/3009471 and “An Analysis of the Variance and Distribution of Commodity Price Changes” deal with a method of pre-processing price data which is suitable for many … Continue reading

Posted in astronomy-Solar, cycles-Analysis, economy-Commodities, economy-Markets, researchers-Dewey, Software-General | Tagged , , , , , , , , | 4 Comments