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Carbon — to capture or not to capture

This came up on 2nd November 2024 (give or take a day), a broadcaster objecting to a carbon capture...

The Azolla Event: when is a fern not a fern?

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Betelgeuse, Gamow, and a Big Red Horse

There has been a lot of talk recently of Betelgeuse possibly going supernova this century or not...

Climate Change, the Walrus and the Carpenter

I have recently watched two videos on climate change by Sabine Hossenfelder.  The first one...

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Robert H OlleyRSS Feed of this column.

Until recently, I worked in the Polymer Physics Group of the Physics Department at the University of Reading.

I would describe myself as a Polymer Morphologist. I am not an astronaut,

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Cleaning your own pollutants may harm you

Cleaning your own pollutants may harm you

Dec 08 2010 | comment(s)

Many metals have special oxygen transfer properties which improve the utility of hydrogen peroxide. By far, the most common of these is iron which, when used in the prescribed manner, results in the generation of highly reactive hydroxyl radicals (. OH). The reactivity of this system was first observed in 1894 by its inventor H.J.H. Fenton, but its utility was not recognized until the 1930s once the mechanisms were identified.

So say US Peroxide, a company marketing ‘Technologies for a Clean Environment’.
A Medieval Practice To Be Restored?

A Medieval Practice To Be Restored?

Nov 15 2010 | comment(s)




Warning! If you’re thinking this is going to be about gruesome punishments or such like, prepare to be disappointed! This is about teaching and learning electromagnetism.
Maxwell and Faraday

Maxwell and Faraday

Nov 08 2010 | comment(s)

Having read the biography of Oliver Heaviside, I remain aware that I am not really au fait with inductance as I am with resistance and capacitance.  Searching without much success for a textbook that would explain it in a way I could understand, I came upon A Treatise on Electricity and Magnetism - Volume 2 by James Clerk Maxwell.  Turning to the relevant section, my eye fell upon this:
The Heavy Side

The Heavy Side

Nov 02 2010 | comment(s)


“England is the paradise of individuality, eccentricity, heresy, anomalies.”
So wrote George Santayana http://en.wikipedia.org/wiki/George_Santayana in 1922.
Two Wrongs Making A Right?

Two Wrongs Making A Right?

Oct 29 2010 | comment(s)


Here we have two words, one in Arabic and one in Hebrew, which scholars of those languages will have no difficulty in recognizing as descending from the same ancient Semitic source. In Arabic the word means “error” in the sense of “error message” from a computer. The Arabic version is pronounced “khata” (with an emphatic “t”), and the Hebrew is quite similar.

I’m sticking with the Arabic for now, because this is the jumping-off point for an interesting bit of medieval mathematical history.
Speak up for biodiesel?

Speak up for biodiesel?

Oct 28 2010 | comment(s)

«There are two main ways in which policymakers are insidiously interfering with the usual rules of supply and demand for raw materials, and myriad different smaller ones. . . . One is the policy of ultra-cheap money in advanced economies to fight the economic crisis; and the other, more commodity-specific one, is massive public subsidy for the production of bio-fuels. Food is being elbowed out by pursuit of "clean fuel". »

So writes Jeremy Warner, Assistant Editor of the Telegraph, in an article entitled