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- Strange London buses
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- Another horizontal advert for an only slightly more expensive drone
- First test against NZ – first day
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- High hair
- Hungerford Footbridges photographers
- An alien robot playing the cymbals and paps
- A photographer and an advert
- “The temptation to pre-order one of these is almost unbearable …”
- Tourists and locals in London
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6000 Miles from Civilisation
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Category archive: Science
I’ve been reading Paul Kennedy’s Engineers of Victory, which is about how WW2 was won, by us good guys. Kennedy, like many others, identifies the Battle of the Atlantic as the allied victory which made all the other victories over Germany by the Anglo-American alliance possible. I agree with the Amazon reviewers who say things like “good overview, not much engineering”. But this actually suited me quite well. At least I now know what I want to know more about the engineering of. And thanks to Kennedy, I certainly want to know more about how centimetric radar was engineered.
Centimetric radar was even more of a breakthrough, arguably the greatest. HF-DF might have identified a U-boat’s radio emissions 20 miles from the convoy, but the corvette or plane dispatched in that direction still needed to locate a small target such as a conning tower, perhaps in the dark or in fog. The giant radar towers erected along the coast of southeast England to alert Fighter Command of Luftwaffe attacks during the Battle of Britain could never be replicated in the mid-Atlantic, simply because the structures were far too large. What was needed was a miniaturized version, but creating one had defied all British and American efforts for basic physical and technical reasons: there seemed to be no device that could hold the power necessary to generate the microwave pulses needed to locate objects much smaller than, say, a squadron of Junkers bombers coming across the English Channel, yet still made small enough to be put on a small escort vessel or in the nose of a long-range aircraft. There had been early air-to-surface vessel (ASV) sets in Allied aircraft, but by 1942 the German Metox detectors provided the U-boats with early warning of them. Another breakthrough was needed, and by late spring of 1943 that problem had been solved with the steady introduction of 10-centimeter (later 9.1-centimeter) radar into Allied reconnaissance aircraft and even humble Flower-class corvettes; equipped with this facility, they could spot a U-boat’s conning tower miles away, day or night. In calm waters, the radar set could even pick up a periscope. From the Allies’ viewpoint, the additional beauty of it was that none of the German systems could detect centimetric radar working against them.
Where did this centimetric radar come from? In many accounts of the war, it simply “pops up”; Liddell Hart is no worse than many others in noting, “But radar, on the new 10cm wavelength that the U-boats could not intercept, was certainly a very important factor.” Hitherto, all scientists’ efforts to create miniaturized radar with sufficient power had failed, and Doenitz’s advisors believed it was impossible, which is why German warships were limited to a primitive gunnery-direction radar, not a proper detection system. The breakthrough came in spring 1940 at Birmingham University, in the labs of Mark Oliphant (himself a student of the great physicist Ernest Rutherford), when the junior scientists John Randall and Harry Boot, working in a modest wooden building, finally put together the cavity magnetron.
This saucer-sized object possessed an amazing capacity to detect small metal objects, such as a U-boat’s conning tower, and it needed a much smaller antenna for such detection. Most important of all, the device’s case did not crack or melt because of the extreme energy exuded. Later in the year important tests took place at the Telecommunications Research Establishment on the Dorset coast. In midsummer the radar picked up an echo from a man cycling in the distance along the cliff, and in November it tracked the conning tower of a Royal Navy submarine steaming along the shore. Ironically, Oliphant’s team had found their first clue in papers published sixty years earlier by the great German physicist and engineer Adolf Herz, who had set out the original theory for a metal casement sturdy enough to hold a machine sending out very large energy pulses. Randall had studied radio physics in Germany during the 1930s and had read Herz’s articles during that time. Back in Birmingham, he and another young scholar simply picked up the raw parts from a scrap metal dealer and assembled the device.
Almost inevitably, development of this novel gadget ran into a few problems: low budgets, inadequate research facilities, and an understandable concentration of most of Britain’s scientific efforts at finding better ways of detecting German air attacks on the home islands. But in September 1940 (at the height of the Battle of Britain, and well before the United States formally entered the war) the Tizard Mission arrived in the United States to discuss scientific cooperation. This mission brought with it a prototype cavity magnetron, among many other devices, and handed it to the astonished Americans, who quickly recognized that this far surpassed all their own approaches to the miniature-radar problem. Production and test improvements went into full gear, both at Bell Labs and at the newly created Radiation Laboratory (Rad Lab) at the Massachusetts Institute of Technology. Even so, there were all sorts of delays - where could they fit the equipment and operator in a Liberator? Where could they install the antennae? - so it was not until the crisis months of March and April 1943 that squadrons of fully equipped aircraft began to join the Allied forces in the Battle of the Atlantic.
Soon everyone was clamoring for centimetric radar - for the escorts, for the carrier aircraft, for gunnery control on the battleships. The destruction of the German battle cruiser Scharnhorst off the North Cape on Boxing Day 1943, when the vessel was first shadowed by the centimetric radar of British cruisers and then crushed by the radar-controlled gunnery of the battleship HMS Duke of York, was an apt demonstration of the value of a machine that initially had been put together in a Birmingham shed. By the close of the war, American industry had produced more than a million cavity magnetrons, and in his Scientists Against Time (1946) James Baxter called them “the most valuable cargo ever brought to our shores” and “the single most important item in reverse lease-lend.” As a small though nice bonus, the ships using it could pick out life rafts and lifeboats in the darkest night and foggiest day. Many Allied and Axis sailors were to be rescued this way.
For all his joie de vivre, Jardine is a master drone builder and pilot whose skills have produced remarkable footage for shows like Australian Top Gear, the BBC’s Into the Volcano, and a range of music videos. His company Aerobot sells camera-outfitted drones, including custom jobs that require unique specifications like, say, the capacity to lift an IMAX camera. From a sprawling patch of coastline real estate in Queensland, Australia, Jardine builds, tests, and tweaks his creations; the rural tranquility is conducive to a process that may occasionally lead to unidentified falling objects.
Simply put, if you’ve got a drone flying challenge, Jardine is your first call.
So, Mr Jardine is now flying his flying robots over volcanoes. There are going to be lots of calls to have these things entirely banned, but they are just too useful for that to happen.
When I was a kid and making airplanes out of balsa wood and paper, powered with rubber band propellers, I remember thinking that such toys were potentially a lot more than mere toys. I’m actually surprised at how long it has taken for this to be proved right.
What were the recent developments that made useful drones like Jardine’s possible? It is down to the power-to-weight ratio of the latest mini-engines? I tried googling “why drones work”, but all I got was arguments saying that it’s good to use drones to kill America’s enemies, not why they are now usable for such missions.
Incoming from Michael J:
Katy Perry and dancing Nazi sharks. I guess this is why you stay up for the Superbowl.
Actually I missed KP’s half time performance, but I have it on one of my various TV hard disks. I did stay up until the Superbowl ended, but I found myself only giving it about a third of my attention.
I did tune in at the end. That bizarre catch was fun. But the game ended the way it did because, at any rate in the opinion of all the commentators, the Seattle Seahawks made a horrible mistake. ("I cannot believe that call!") Truly great games are won because of something wonderful, not something horrible. In an ideal world, you want the losers thinking, not: “Oh Shit, What Were We Thinking?!?!? We’ll have nightmares about that for the rest of our lives.” You want them thinking: “Well, there was nothing we could have done about that.” And the winners can spend the rest of their lives remembering that they did it, not that the other guys did it for them.
And then this morning there was this:
6 1 6 . 6 6 | . 4 W 4 W 1 | 1 . 1wd 6 6 6
That’s the last three overs of the England Second Eleven‘s batting effort against the South Africa Second Eleven. I love how you can now follow these bizarrely obscure games. Ben Stokes, who has been having a rough time of it of late, is the one hitting six of those seven sixes at the end, and finishing on 151 not out (off 86 balls) , out of 378-6. Perhaps someone in the England First Eleven (recently crushed by Australia in a triangular warm-up tournament) will get hurt during the forthcoming World Cup, and Stokes will be inserted into their team. Such is the romance of sport.
Finally, here is a piece by cricket boffin Ed Smith, about how having fun is very important. Because of fun, Alexander Fleming invented penicillin, etc. But the real reason for fun is that having fun is fun. It’s articles like this that cause insane parents to send their children to Fun Classes.
I shouldn’t mock. It’s a good piece. And fun is what this blog here is mostly about.
Another Bit from a Book, and once again I accompany it with a warning that this Bit could vanish at any moment, for the reasons described in this earlier posting.
This particular Bit is from The Rational Optimist by Matt Ridley (pp. 255-258):
Much as I love science for its own sake, I find it hard to argue that discovery necessarily precedes invention and that most new practical applications flow from the minting of esoteric insights by natural philosophers. Francis Bacon was the first to make the case that inventors are applying the work of discoverers, and that science is the father of invention. As the scientist Terence Kealey has observed, modern politicians are in thrall to Bacon. They believe that the recipe for making new ideas is easy: pour public money into science, which is a public good, because nobody will pay for the generation of ideas if the taxpayer does not, and watch new technologies emerge from the downstream end of the pipe. Trouble is, there are two false premises here: first, science is much more like the daughter than the mother of technology; and second, it does not follow that only the taxpayer will pay for ideas in science.
It used to be popular to argue that the European scientific revolution of the seventeenth century unleashed the rational curiosity of the educated classes, whose theories were then applied in the form of new technologies, which in turn allowed standards of living to rise. China, on this theory, somehow lacked this leap to scientific curiosity and philosophical discipline, so it failed to build on its technological lead. But history shows that this is back-to-front. Few of the inventions that made the industrial revolution owed anything to scientific theory.
It is, of course, true that England had a scientific revolution in the late 1600s, personified in people like Harvey, Hooke and Halley, not to mention Boyle, Petty and Newton, but their influence on what happened in England’s manufacturing industry in the following century was negligible. Newton had more influence on Voltaire than he did on James Hargreaves. The industry that was transformed first and most, cotton spinning and weaving, was of little interest to scientists and vice versa. The jennies, gins, frames, mules and looms that revolutionised the working of cotton were invented by tinkering businessmen, not thinking boffins: by ‘hard heads and clever fingers’. It has been said that nothing in their designs would have puzzled Archimedes.
Likewise, of the four men who made the biggest advances in the steam engine - Thomas Newcomen, James Watt, Richard Trevithick and George Stephenson - three were utterly ignorant of scientific theories, and historians disagree about whether the fourth, Watt, derived any influence from theory at all. It was they who made possible the theories of the vacuum and the laws of thermodynamics, not vice versa. Denis Papin, their French-born forerunner, was a scientist, but he got his insights from building an engine rather than the other way round. Heroic efforts by eighteenth-century scientists to prove that Newcomen got his chief insights from Papin’s theories proved wholly unsuccessful.
Throughout the industrial revolution, scientists were the beneficiaries of new technology, much more than they were the benefactors. Even at the famous Lunar Society, where the industrial entrepreneur Josiah Wedgwood liked to rub shoulders with natural philosophers like Erasmus Darwin and Joseph Priestley, he got his best idea - the ‘rose-turning’ lathe - from a fellow factory owner, Matthew Boulton. And although Benjamin Franklin’s fertile mind generated many inventions based on principles, from lightning rods to bifocal spectacles, none led to the founding of industries.
So top-down science played little part in the early years of the industrial revolution. In any case, English scientific virtuosity dries up at the key moment. Can you name a single great English scientific discovery of the first half of the eighteenth century? It was an especially barren time for natural philosophers, even in Britain. No, the industrial revolution was not sparked by some deus ex machina of scientific inspiration. Later science did contribute to the gathering pace of invention and the line between discovery and invention became increasingly blurred as the nineteenth century wore on. Thus only when the principles of electrical transmission were understood could the telegraph be perfected; once coal miners understood the succession of geological strata, they knew better where to sink new mines; once benzene’s ring structure was known, manufacturers could design dyes rather than serendipitously stumble on them. And so on. But even most of this was, in Joel Mokyr’s words, ‘a semi-directed, groping, bumbling process of trial and error by clever, dexterous professionals with a vague but gradually clearer notion of the processes at work’. It is a stretch to call most of this science, however. It is what happens today in the garages and cafes of Silicon Valley, but not in the labs of Stanford University.
The twentieth century, too, is replete with technologies that owe just as little to philosophy and to universities as the cotton industry did: flight, solid-state electronics, software. To which scientist would you give credit for the mobile telephone or the search engine or the blog? In a lecture on serendipity in 2007, the Cambridge physicist Sir Richard Friend, citing the example of high-temperature superconductivity - which was stumbled upon in the 1980s and explained afterwards - admitted that even today scientists’ job is really to come along and explain the empirical findings of technological tinkerers after they have discovered something.
The inescapable fact is that most technological change comes from attempts to improve existing technology. It happens on the shop floor among apprentices and mechanicals, or in the workplace among the users of computer programs, and only rarely as a result of the application and transfer of knowledge from the ivory towers of the intelligentsia. This is not to condemn science as useless. The seventeenth-century discoveries of gravity and the circulation of the blood were splendid additions to the sum of human knowledge. But they did less to raise standards of living than the cotton gin and the steam engine. And even the later stages of the industrial revolution are replete with examples of technologies that were developed in remarkable ignorance of why they worked. This was especially true in the biological world. Aspirin was curing headaches for more than a century before anybody had the faintest idea of how. Penicillin’s ability to kill bacteria was finally understood around the time bacteria learnt to defeat it. Lime juice was preventing scurvy centuries before the discovery of vitamin C. Food was being preserved by canning long before anybody had any germ theory to explain why it helped.
This article confirms not one but two of my medical prejudices, which is double nice. Experts have their uses, one of which is to tell you that you have been right all along about something they’ve only just discovered.
The article is about artificial sweeteners, and this is how it ends:
What does this all mean?
1. Our gut bacteria matters a lot. Some guts can withstand artificial sugars well and others can’t. It stands to reason that, as we learn more about the uniqueness of our own microbiome, those of us who want to lose weight would be well served by diets that are tailored to the way our body and its biomic mini-me processes sugar.
2. Artificial sweeteners are pervasive and some people still can lose weight and enhance their health while consuming them. But since we now know that, on balance, they seem to be more bad than good, moderating how much we consume might be smart, too.
3. The study suggests that if people replace artificial sugars with real sugars or cut it out, their biomes could change in a way that contributes to the restoration of normal glucose tolerance over time, all other things being equal.
So, artificial sweeteners have a tendency to be very bad for you. That’s prejudice of mine number one. But, they may not be bad for you because, and this is prejudice of mine number two, people vary, physically. There is not just the one way of being healthy. There are a minimum of several, and what is harmless or even beneficial for you and to those like you may be very bad for other sorts of people.
The basic reason I came to think that artificial sweeteners might be bad for me was, to begin with, pure rationalisation of the fact that I have always thought that they taste disgusting, compared to sugar. “Diet” stuff, as a general rule, tasted, to me, horrible compared to regular stuff. In particular, Diet Coke tasted like that pink liqued they make you gargle with at the dentist. I started out believing that Diet Coke is bad for you because I wanted it to be, and I wanted the Regular Coke that I have always chosen when coking up to be less bad. But the more I thought about that early frisson of (literally) distaste, the more I came to believe that my at first merely wishful thinking actually did make some sense. Sugar really is somewhat more natural than most sweeteners, or so I assume, and we are more likely to be creatures that can handle sugar, even if not in the quantities that life now offers.
Plus, about five years ago, my niece told me that aspartame (which she said is an evil chemical used to make evil non-sugar) is evil. Rubbish says Big Aspartame. But I reckon, for some people, it is evil.
While rootling around in the www like it was about 2003, I found this piece, dating from 2009, which was all about this apparently pretty but otherwise unremarkable abstract picture:
In case you don’t already know what is going on here, the big story here is that the blue bits and the green bits are the same colour. What colour your eyes see something as depends on the other colours in the immediate vicinity.
The writer linked to above found this graphic here, which you can too if you do a bit of scrolling down.
If you saw this around 2009, or something similar around 2003, then apologies for the repetition. That early period of blogging, just after 2000, will always seem to me like a fleeting golden age, when everything of this sort was being discovered and passed on for the very first time. Because we could. Before, we couldn’t. Now, we could. But now (as in now), most of this sort of trivia has been in circulation for a decade, and it lacks the impact it once had. We bloggers must find new things to say, to cover for the fact that blogging itself is no longer new. This is not a bad thing.
I’ve been reading Bryson’s At Home: A Short History of Private Life, and very entertaining and informative it is too. Strangely, one of the best things about it for me was that he explained, briefly and persuasively, both the rise to global stardom and the fall from global stardom of British agriculture. The rise was a lot to do with the idea of crop rotation. I remember vaguely being told about this in a prep school history class, but although I did remember the phrase “crop rotation”, I didn’t care about it or about what it made possible.
Here is Bryson’s description of this key discovery:
The discovery was merely this: land didn’t have to be rested regularly to retain its fertility. It was not the most scinitillatingof insights, but it changed the world.
Traditionally, most English farmland was divided into long strips called furlongs and each furlong was left fallow for one season in every three - sometimes one season in two - to recover its ability to produce healthy crops. This meant that in any year at least one-third of farmland stood idle. In consequence, there wasn’t sufficient feed to keep large numbers of animals alive through the winter, so landowners had no choice but to slaughter most of their stock each autumn and face a long, lean period till spring.
Then English farmers discovered something that Dutch farmers had known for a long time: if turnips, clover or one or two other suitable crops were sown on the idle fields, they miraculously refreshed the soil and produced a bounty of winter fodder into the bargain. It was the infusion of nitrogen that did it, though no one would understand that for nearly two hundred years. What was understood, and very much appreciated, was that it transformed agricultural fortunes dramatically. Moreover, because more animals lived through the winter, they produced heaps of additional manure, and these glorious, gratis ploppings enriched the soil even further.
It is hard to exaggerate what a miracle all this seemed. Before the eighteenth century, agriculture in Britain lurched from crisis to crisis. An academic named W. G. Hoskins calculated (in 1964) that between 1480 and 1700, one harvest in four was bad, and almost one in five was catastrophically bad. Now, thanks to the simple expedient of crop rotation, agriculture was able to settle into a continuous, more or less reliable prosperity. It was this long golden age that gave so much of the countryside the air of prosperous comeliness it enjoys still today, ...
The fall of British agriculture was all mixed up with refrigeration, which enabled the wide open spaces of the late nineteenth century world to make masses of food and to transport it to hungry urban mouths everywhere before it went bad. Prices fell below what the farmers of Britain (where there were no wide open spaces by global standards) could match.
This afternoon, The Guru is coming by to reconstruct God, so God (the other one) willing, I will be back in serious computing business by this evening.
When I was recently in Brittany, my hosts supplied me with a state-of-the-art laptop and a state-of-the-art internet connection. These last few days, without God (my one) and having to make do with Dawkins (my obsolete and clunky little laptop, the thing I am typing into now), I have felt less connected to the world than I did in Brittany. I am connected, after a fashion. But Dawkins is so slow and clunky that I have been doing only essentials (like finding out about England being hammered in the ODI yesterday), and checking incoming emails, and shoving anything however bad up here once every day. It’s like I’ve regressed to about 2000.
I have managed to put up a few pictures here, in God’s absence. But Dawkins’ screen makes these pictures look terrible. I am looking forward to seeing God’s version of these pictures and hope they will be greatly improved compared to what I am seeing now.
Thank God (the other one) I haven’t been depending on God (my one) for music. As I have surely explained here many times, one big reason I prefer CDs (and separate CD players scattered around my home) to all this twenty first century computerised music on a computer is that if God goes wrong, as he just has, I don’t lose music. I also have music concerts recorded off of the telly, onto DVDs, which I can play on my telly, which is likewise a completely separate set-up to God.
In general, the argument against having everything done by one great big master computer is that when something goes wrong with that master computer, everything else in your life also goes wrong, just when you may need those things not to. One of the things that willgo wrong, rather regularly, with your all-in-one master computer is when this or that particular one of its excessively numerous functions becomes seriously out of date. I mean, if it has a vacuum cleaner included, what happens if vacuum cleaners suddenly get hugely better? In Brian world, all I have to do is get another new and improved vacuum cleaner, and chuck out the old one. In all-in-one master computer world, you are stuck with your obsolete vacuum cleaner. Or, if you can, you have to break open your all-in-one master computer and fit a new vacuum cleaner, and probably also lots of other new stuff to make sure the new vacuum cleaner works, which buggers up a couple of your other functions that used to work fine but which no longer work fine. Or at all. I prefer to keep things simple, and separate.
Something rather similar applies with how to handle (the other) God. That is another arrangement you don’t want to have running the whole of your life for you either. It’s okay if you do God for some of the time and keep Him in his place, but you want scientists telling you about science, doctors about medicine, and your work colleagues about your work, and so on. If, on the other hand, absolutely everything in your life, and worse, everything in the entire world you live in, is controlled by ((your version of) the other) God, everything is very liable to go to Hell. (Aka: Separation of Church and State. Aks: don’t be a religious nutter.)
I have my own particular take on (the other) God, which is that He is made-up nonsense. But just as wise believers in (the other) God don’t let that dominate their thinking on non-God things, nor do I think that my opinions about (the other) God can explain everything else as well. These opinions merely explain the particular matter of (the other) God being made-up nonsense.
Do not, as they say, put all your eggs in one basket.
Confirming my String prejudices
The colour of sound - I now get this because I just experienced it!
A global temperature graph that seems to fit the recent facts
Libeskind doing the saw cut style in Ontario
Dezeen continues to delight
Finding Rover app tracks lost dogs using facial recognition
Why I admire short term weather forecasts but why cricket people don’t
Views from Kings College
BMdotCOM mixed metaphor of the day
Feynman Diagrams on the Feynman van
Wedding photography (1): The superbness of the weather
Me and the Six Nations under the weather
The Qur’an is not science – science cannot be ignored
Steven Pinker’s description of The Enlightenment
Why I do not share Johnathan Pearce’s admiration for Bjorn Lomborg
What’s up with that?
BMdotCOM Headline of the week
University of California chickens coming home to roost?
Hockey Stick art
Matt Ridley’s demolition of CAGW
Science can relax about the harm done to it by Climategate
“Things appear almost impossible to escape from …”
Animals that like the smell of humans dying
Climate science as make-work for former Cold Warriors
Cats only seem smart and dogs only seem dumb
Cats know more about fluid mechanics than dogs
Funny feline ephemeron
A blog posting linking to a science article
Cool cat that obeys Allen’s Rule
A serious disappointment
Lucky we didn’t go to Lords
Nasa and Gordon Brown both have their uses
Talking about The Hockey Stick Illusion with Bishop Hill
Towers under the weather - and a steam engine steams to the rescue
Stepping forward into the abyss!
Yet more ramblings about Guesswhatgate
Unravelling the puzzle – and making it into a movie
Picture purrfection and a rather good Clive James piece
Old-school media versus (or becoming) new-school media (again)
ClimateGate roars on and Man(n)-made warming is taking on a whole new meaning
What’s up with this?
Link to a list of peer-reviewed papers supporting skepticism of “man-made” global warming
Shadows on rings
Green cats - feral cats - cats murdered in Wales - more than 113 cats in Livingston NJ
Why I vote against AGW
A little archaeology
Friday baby marmoset
Truth is true
Nothing from me here today but something on Samizdata about cannabis
Link to Samizdata piece about arguments from incredulity
The impossibility of God but the possibility of Michael Flatley’s cure and of super-super-flees
How patent lawyers destroyed a mathematician
John Carey on Shakespeare and the high-art/ popular-art distinction
On the nature of the evolution argument
Star and stripe
Man regrows finger
More horizontal thinness
Tatiana the normal tiger
Has global warming stopped?
Better safe than sorry
The cat genome is cool
She’s alive I tell you! Alive!
Big Solar System things
Short picture of a long distance
Don’t be a physics teacher
Not actually a photo of Saturn’s rings
Back lit Billion Monkey lady and back lit Saturn!
The idea that mental illness does not exist
Plastic that conducts heat better
So that’s how you pronounce Csikszentmihalyi
Thomas Edison - from cheat to creator
Alessandro Volta feels electricity on his tongue
The Great Global Warming Swindle debate now begins
Svensmark – for and against
A basic part of the domestic cat’s heritage
On the ideology of the “climate change” debate
New York Times links - owned genes
I am about to become a published photographer
Geek girl I like your thinkings - are nice - I want have sex with it
Something to bore everyone
Blogging takes longer than doing things - a picture - and why does a hot bath make me colder?
Was that you or a tree?
What is a squarry?