Category Archives: Soapbox

Extraordinary technical intelligence

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In his book ‘A History of the World’, Andrew Marr identifies a recurring process in the development of societies, from an agricultural revolution that releases enough people from food production in the countryside to enable basic manufacturing in town and cities, through an industrial revolutions leading to more sophisticated manufacturing and a large, rapid rise in the standards of living.  This process happened first in Britain during the 18th and 19th century, in the US during the 19th and 20th century and then more quickly in Japan, Korea and Taiwan in the second half of the 20th century.  It is happening now and even faster in China with the same ‘grim working conditions in the factories, the raucous enjoyment of plenty by the winners in the cities and a certain recklessness about pollution’ to quote Andrew Marr [Marr, A., A History of the World, MacMillan, 2012].  It is starting in India and Africa might be next, though in the Financial Times on Friday 22nd March, 2013 Chandran Nair argues that we should reverse the flow from the countryside to the cities if we want to achieve a sustainable society.  This might just be possible in Africa, probably not in India and China seems set to follow the well-beaten path to urban industrialisation.

What comes next in the process?  Perhaps a loss of interest in manufacturing industry, followed by over-spending by individuals and governments, economic recession or collapse and stagnation of growth.  Andrew Marr suggests that the wealth based on manufacturing derives from ‘mankind’s extraordinary technical intelligence’ and that there is ‘a long lag in advancing our political and social intelligence’.  The stale-mate at the heart of US politics and the failure of successive UK governments to avert a multi-dip economic recession would suggest the need to advance our political intelligence.  In the meantime we might lose our technical intelligence if don’t train more graduates in technology [see my post on Financial crisis, 27th March, 2013].

Financial crisis

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I was in Germany for a progress meeting of a research project last week.  There was talk in the coffee breaks about the financial crisis in Cyprus.  There seemed to be recognition amongst the Germans present that Germany has to assist the Cypriots and other EU member states in financial difficulty.  One reason cited was the Cypriots and other EU nations are consumers of the products of German manufacturing industry including cars, washing machines and pharmaceuticals, and Germany needs customers for its manufactured goods.  Of course, Germany is rich, at least in part, due to its engineering and manufacturing prowess.

In a similar way, during the 19th and early 20th centuries, Britain grew rich from its manufacturing industries.  Some of Britain’s current economic woes derive from its neglect of these wealth-generating industries.  A recent report [http://www.timeshighereducation.co.uk/news/graduates-in-stem-need-to-rise-by-half/2002594.article] suggests that the UK needs to train an extra 40,000 graduates in science and engineering every year just to maintain the status quo in this sector of the economy which is a 50% increase over current levels.  I suspect that the UK is typical of many European countries.

Is it time that so-called ‘bail-out’ and ‘bail-in’ packages for countries included strategies for stimulating and supporting wealth creation industries rather than just rescuing those that have gambled with other people’s wealth?

Two Cultures

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cpsnowThe term ‘Two Cultures’ was coined by Sir Charles Snow more than fifty years ago in his 1959 Rede Lecture to describe the gulf that existed then and persists today between scientists and non-scientists.  He equated not knowing the second law of thermodynamics to never having read anything by Shakespeare.  A number of my posts have referred to the Second Law of Thermodynamics because it explains why engines run and chemical reactions occur but to quote Peter Atkins, it is also ‘the foundation for understanding those most exquisite consequences of chemical reactions – acts of literary, artistic and musical creativity that enhance our culture‘.

Snow, C.P., The Two Cultures: and A Second Look, Cambridge University Press, Cambridge, 1964.

Atkins, P., The Laws of Thermodynamics –  A Very Short Introduction, Oxford University Press, Oxford, 2010.

Something for nothing?

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Let’s try a thought experiment, following on from my previous post (Beyond Zero on 20th February, 2013).  Imagine two equal amounts of matter, A and B at -350 Kelvin and 350 Kelvin respectively.  We would expect heat to flow from the hot one, that’s B to A, the cold one.  This would cause the internal energy of B to decrease with a corresponding rise in the internal energy of A so that B gets colder while A gets hotter, i.e. they both move closer to absolute zero with corresponding decreases in entropy.  The Second Law of Thermodynamics does not allow this to happen and in fact the reverse would occur, i.e. heat would flow from the cold one A to B, lowering the temperature of A and raising the temperature of B so that they both move away from absolute zero with corresponding increases in entropy.coldgraph2

IF we could actually make this happen then we would able to design engines with efficiencies higher that 100%.  One corollary of the Second Law of Thermodynamics is that heat cannot be converted into work without some of the heat being wasted or lost as entropy.  In a power station, heat is taken from a hot source (e.g. a nuclear reactor, solar concentrator or gas furnace) and some of it converted into shaft work, which turns a generator to produce electricity, while the remainder is dumped into a cold sink usually the environment via cooling towers.  However, if our cold sink was at a negative temperature on the Kelvin scale then we could take heat from the cold sink and the hot source at the same time!  Why aren’t we doing this?  Well, we don’t have any naturally occurring cold sinks at below zero Kelvin and to create one uses more energy than we would gain in our super-efficient power station – that’s the Second Law kicking in again.  So you can’t have something for nothing.