John M Wheeldon

5 Questions 32 Answers 0 Followers

Questions related from John M Wheeldon

What statistical test should be used to determine if a data trend matches a theoretical relationship or not?

I have twelve data sets that I am fitting to a theoretical relationship. If the relationship is valid, the trend of the data should pass through the origin. For ten data sets, the trend passes...

29 January 2023 4,223 17 View

Does the Earth get closer and further from the Sun as the star orbits the centre of mass in the solar system?

Research published in Scientific Reports, extends the controversial view that climate change is the result of natural solar cycles and the Earth getting closer to the Sun. The authors claim that...

23 July 2019 1,791 3 View

Are the friction factors from Moody charts universally applicable?

I have used Moody charts for estimating pipe run pressure drops throughout my career generally with good success. Until recently, I had not checked that the friction values from the operating...

02 June 2019 7,910 11 View

How to calculate signal coherence from auto-correlation functions?

I am revisiting some data I collected eons ago with a Hewlett Packard 3721A correlator (now obsolete). I used the cross-correlation facility to determine the transit time between two sensors from...

29 January 2019 1,540 2 View

If CCS is not deployed what technolgies will be used for power generation, heating, and motive power?

Many believe that renewables are the only long-term approach to reduce GHG emissions radically. In the absence of fossil fuels with CCS, electricity has to be generated for heating, lighting,...

01 January 1970 2,338 6 View