Keyboard worrier

Friday, March 14, 2014

Gasless


83% of UK homes are heated by gas and much of our domestic electricity is supplied by gas-powered generating stations. Some estimate future supply at 40 - 50 years, so if you have children of school age they will live to see the end of gas in the home.

What's the plan?

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Thursday, March 13, 2014

Professional trouser hunters

From dailymail.co.uk

From nknews.org

An acquaintance of mine, a North Korean refugee currently living in South Korea, told me how, in the early 2000s, she broke a bone. The incident happened one afternoon when she was on the way home. A few streets away from her house she encountered a patrol of regular police and militia, and she instantly knew she was in trouble because she had done something seriously improper. She had no choice but to run, and while trying to get away from her pursuers she broke a bone in her feet. But she still escaped the hand of law.

What was the crime she had committed? She was wearing trousers while walking the streets of a major North Korean city.

This story might seem strange. As every visitor to North Korea can testify, there are a great number of women clad in trousers on the streets of major North Korean cities. Nonetheless, a theoretical ban on women wearing trousers has existed since the late 1970s. Its enforcement has, however, been rather patchy at best.

My acquaintance did not blame her pursuers for the above-mentioned incident, instead she blamed herself. She knew that patrols of professional trouser hunters could be encountered only in certain parts of the city and only at certain times of the day, and she believes she was foolhardy to venture into such a high-risk area dressed in such an “indecent” way. 



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Wednesday, March 12, 2014

Oceans protecting us from global warming? For how long?

Are the scientists researching climate change allowing sufficiently for the moderating role of water?

Water has a high specific heat capacity. The same energy that raises the temperature of water by 1°C, will make copper hotter by more than 10°C.

This Time article (November 2013) reports "the vast oceans carry 93% of the stored energy from climate change, compared to just 1% for the atmosphere, with melting ice and landmasses making up the rest." Some of that energy goes to raising the temperature at certain depths.

But water has other ways of processing heat. It can expand, so that could be one of the reasons sea levels are rising.

There is also water's tendency to form chains of molecules - or even rings - and presumably heat energy will be used in the breaking of these structures, and there's a lot of them in the Earth's 1.3 billion cubic kilometres of ocean.

Another energy-employing phase change is evaporation. “The atmosphere’s water vapor content has increased by about 0.41 kilograms per square meter (kg/m²) per decade since 1988, and natural variability in climate just can’t explain this moisture change," says this article.

And then there's claims and counterclaims about melting ice. The argument is plagued by complexity because of the warming, cooling, evaporating and precipitating effects of wind currents and the difficulty of measuring ice thickness as well as extent.

The thermal absorption properties of water may have bought us more time, but they don't let us completely off the hook. Just as we are learning to discount climate change alarmists, we should look more skeptically at the sanguinists. There's a huge difference between "small chance" and "no chance", as we have found in financial matters; also, between "a long time ahead" and "never".

And then there's the at present theoretical concern about all that methane currently trapped in the oceans - by the water structures known as "clathrates", structures that heat energy can break.

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Tuesday, March 11, 2014

Blown away by harpsichord

I've got the CD, and play it loud on the motorway. The combination of Frisch's powerful and authoritative playing, the pindrop recording and the tremendous sonorousness of the period (1751) instrument make other harpsichord recordings I've heard seem dull greyscale by comparison. This is not a geek thing - you will be hypnotised, moved, exalted. And when you've heard it, I hope you'll be fair to the artist and buy it.



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All original material is copyright of its author. Fair use permitted. Contact via comment. Unless indicated otherwise, all internet links accessed at time of writing. Nothing here should be taken as personal advice, financial or otherwise. No liability is accepted for third-party content, whether incorporated in or linked to this blog; or for unintentional error and inaccuracy. The blog author may have, or intend to change, a personal position in any stock or other kind of investment mentioned.

Sunday, March 09, 2014

Extraordinary guitar opening

I have to share this with you, perhaps it will move you as it does me. The first minute or so of Almir Sater's "Flor do Amor":



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The future of education: £1-an-hour schoolteachers, billionaire directors

A Daily Kos article currently circulating on Facebook compares American schoolteachers and childminders and calculates that teachers are far cheaper, at $1.42 per child per hour.

How about British teachers?

The main scale annual pay for classroom teachers runs from £21,804 to £37,124 (if you break through into the upper pay scale) and the statutory minimum hours (not counting marking, preparation and voluntary self-development) are 1,265 per year. Given a class of 30 pupils, that works out at 57p - 98p per child per hour (in London, 72p - £1.20.)

Nationally, the pupil-teacher ratio is lower, because some classes are smaller (e.g. with "A"-level groups) and there are teaching roles outside the classroom. On the other hand, teachers actually work much more than the statutory hours (ask anyone who's married to one), so if the pupil-teacher ratio is a third less but teachers work 50% extra hours, the rate remains unchanged.

By way of comparison, the Daycare Trust reckons toddlercare costs average £4.26 per hour.

But we're not comparing like for like: day nurseries have overheads, and so do schools. Overall, including additional amounts for some special needs provision, "core funding" across primary and secondary schools is around £4,000 per head. Even that is an under-estimate. It doesn't take into account higher levels of special needs, or other educational expediture. Three years ago, the average spend per pupil in England was £6,199 per year.

Also, if we're using the consumer model, we need to look at children's hours, not teachers'; but they're not fixed. The old law provided for at least two hours of secular instruction in the morning and two in the afternoon (as to subjects, only religious education was compulsory); today, in England and Wales, there are no minimum school hours, only a requirement for schools to be open for 380 sessions per year. However, a child's entitlement is generally taken as 25 hours a week, which multiplied by 38 weeks equals 950 hours a year.

That suggests a cost per child (in England in 2010) of £6,199 / 950 = £6.53 per hour.

Then you have to add on the cost of capital expenditure programs. At a guess, if it were run as a business, the compulsory education system would probably have to charge something like £10 an hour.

Which brings us to the question of privatisation. As with other formerly publicly-owned assets, there is a potential bonanza in education. The trick will be to get the State to pump in resources first, then transfer them into private hands at an unrealistically low price, together with a ready-made workforce for which the new business hasn't had to pay the costs of training and recruitment.

It would accelerate the process if nominally independent inspectors ran round the country denigrating schools which have a more challenging intake, putting them into "special measures" in preparation for rebirth as semi-autonomous "Academies" and eventually, privately-run outfits.

Oh, the money to be made! For you can squash down the salaries of the teachers, cut corners in all sorts of ways, boost administrators' remuneration and maybe even organise a massive debt-funded sellout-and-run, as Southern Cross Healthcare did with old people's homes.

A fantasy? No, look to the USA, where we started this piece, and see what's happening with "charter schools", educational publishers and testers, and the banks: Yes! Magazine's infographic here is very disturbing.


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Friday, March 07, 2014

Once a generation

1914
1939
1964-ish (young v. old)
1989 - the crumbling of communism
2014 ?

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