Sêr Cymru

Posted in Science Politics with tags , , , on March 24, 2012 by telescoper

The Welsh Government’s vision for a world-leading science base in Wales was unveiled on Thursday 15 March during a keynote address by Wales’ Chief Scientific Officer, Professor John Harries, who delivered a public lecture at Cardiff University to reveal how he thinks this strategic agenda can steer Welsh science and engineering into the future.

Here is the lecture in its entirety

One the principal components this strategy is the Sêr Cymru (“Star Wales”) project which will involve expenditure of about £50 million over 5 years to attract research leaders to Wales. This announcement attracted quite a lot of local news coverage, e.g in the Western Mail, but it isn’t exactly a new proposal. In fact I blogged about it several months ago. Here is a summary of the points I made back then together with some new comments.

The basic point is that Welsh universities currently only attract about 3% of the UK’s total research funding whereas the famous Barnett formula allocates Wales about 5% of the total in other areas of public expenditure. Nobody involved in research would argue for funds to be allocated on any other basis than through quality, so there’s no clamour for having research funding allocated formulaically a là Barnett; the only way to improve the success rate is to improve the quality of applications. John Harries suggests that means poaching groups from elsewhere who’ve already got a big portfolio of research grants…

The problem with that strategy is that it’s not very easy to persuade such people to leave their current institutions, especially if they’ve already spend years acquiring the funding needed to equip their laboratories. It’s not just a question of moving people, which is relatively easy, but can involve trying to replace lots of expensive and delicate equipment. The financial inducements needed to fund the relocation of a major research group and fight off counter-offers from its present host are likely to be so expensive that the benefit gained from doing this takes years to accrue, even they are successful.

I agree with Prof. Harries that Welsh universities need to raise their game in research, but I don’t think this “transfer market” approach is likely to provide a solution on its own. I think Wales needs a radical restructuring of research, especially in science, across the whole sector, which I think is unacceptably complacent about the challenges ahead.

For a start, much more needs to be done to identify and nurture younger researchers, i.e. future research stars rather than present ones. Most football clubs nowadays have an “academy” dedicated to the development of promising youngsters, so why can’t we do a similar thing for research in Wales? Research groups in different Welsh universities also need to develop closer collaborations, and perhaps even full mergers, in order to compete with larger English institutions.

More controversially, I’d say that the problem is not being helped by Welsh universities continuing to be burdened by the monstrous bureaucracy and bizarre practices of the Research Excellent Framework, which allocates “QR” research funds according to priorities set by HEFCE in a way that reflects the thinking of the Westminster parliament. The distribution of QR funding in Wales, which is meant to supplement competitive grant income from UK funding bodies, should be decided by HEFCW in line with Welsh strategic priorities. Wales would be far better off withdrawing from the REF and doing its own thing under the auspices of the Welsh Assembly Government.

In fact there are dark rumours circulating that HEFCW will not have enough money to pay any QR funding anyway. If that’s true then the widening funding gap between Wales and England will do more damage than can possibly be remedied by importing a few big shots from elsewhere. The sum involved (£50 million) seems like a lot, but it won’t pay for more than a few groups around Wales if they are in experimental science or engineering technology, because the cost of setting up new labs and acquiring new equipment is considerable. Although buying in mercenaries might be of short-term benefit, what are the chances that they’ll take someone else’s dollar in the near future?

Wales needs a sustainable research base, so at very least I’d like to see a bottom-up project, encouraging younger researchers at PhD and PDRA level, perhaps through a system of national fellowships, to complement the “top-down” of the Star Wales project. Unless that happens, we might have leaders with no-one to follow them.

VISTA on Video

Posted in The Universe and Stuff with tags , , , , , on March 23, 2012 by telescoper

A chance tweet brought to my attention this video that fits well with a news story that’s been doing the rounds for a few days.   This concerns a very deep and wide survey called UltraVISTA, that has been made using the VISTA telescope at the European Southern Observatory’s Paranal Observatory in Chile. You can find the full press release from ESO that started the media interest here, where some lovely images can also be found.

VISTA is the world’s largest infra-red survey telescope, and is unusual among telescopes for having only one instrument on it, an Infra-red camera.  Technically, therefore,  it should really be called ISTA; owing to cost constraints the Visible camera that was initially proposed to accompany the Infra-red one and supply the V in its acronym,  was never built. Anyway, VISTA was designed explicitly to do survey work involving very distant and faint objects; its forte is to allow very deep images to be made with a very wide field of view, as demonstrated on the video…

Since I’m using the handle “telescoper” on this blog, I suppose I really should post about telescopes a bit more often than I do but I hope this will do for now!

Lines Written in Early Spring

Posted in Poetry with tags , on March 23, 2012 by telescoper

I heard a thousand blended notes,
While in a grove I sate reclined,
In that sweet mood when pleasant thoughts
Bring sad thoughts to the mind.

To her fair works did Nature link
The human soul that through me ran;
And much it grieved my heart to think
What man has made of man.

Through primrose tufts, in that green bower,
The periwinkle trailed its wreaths;
And ’tis my faith that every flower
Enjoys the air it breathes.

The birds around me hopped and played,
Their thoughts I cannot measure:–
But the least motion which they made
It seemed a thrill of pleasure.

The budding twigs spread out their fan,
To catch the breezy air;
And I must think, do all I can,
That there was pleasure there.

If this belief from heaven be sent,
If such be Nature’s holy plan,
Have I not reason to lament
What man has made of man?

by William Wordsworth (1770-1850)

B2FH

Posted in The Universe and Stuff with tags , , , , , , , , on March 22, 2012 by telescoper

I spent a pleasant evening yesterday at a public lecture arranged by Cardiff Scientific Society and given by Professor Mike Edmunds, former Head of the School of Physics & Astronomy at Cardiff University and now Emeritus Professor here. The subject of his talk was Origin of the Chemical Elements, a subject Mike has worked on for many years. Here’s the abstract of his talk:

When the Universe was 300,000 years old, the only chemical elements with significant abundance were hydrogen, helium and a small amount of lithium. All the atoms of all the other elements in the Periodic Table have been synthesised during the 13.7 billion years since that time. Research in physics and astronomy over the last 64 years has allowed us to identify the nuclear processes involved, including the importance of the humble neutron in the manufacture of the heavier elements. We now have a good picture of the astronomical sites where elements such as the carbon, nitrogen, oxygen and iron in our bodies were made, including violent supernova explosions. It is a picture that appears almost, but not quite, complete.

That last sentence is tempting fate a bit, but it’s fair comment! The lecture, which I had the pleasure of chairing, was both entertaining and informative, and very warmly received by the large audience in the Reardon Smith Lecture Theatre (in the National Museum of Wales).

Inevitably in a talk on this subject, the subject came up of the classic work of Burbidge, Burbidge, Fowler and Hoyle in 1957 (a paper usually referred to as B2FH after the initials of its authors). It’s such an important contribution, in fact, that it has its own wikipedia page

This reminded me that one of the interesting astronomical things I’ve acquired over the years is a preprint of the B2FH paper. Younger readers will probably not be aware of preprints – we all used to post them in large numbers to (potentially) interested colleagues before publication to get comments – because in the age of the internet people don’t really bother to make them any more.

Anyway, here’s a snap of it.

It’s a hefty piece of work, and an important piece of astronomical history. In years to come perhaps it may even acquire some financial value. Who knows?

Teaching Physics

Posted in Education, The Universe and Stuff with tags , , on March 22, 2012 by telescoper

More on this weeks’ theme, from the inestimable xkcd

The Budget – a Pictorial Guide

Posted in Finance, Politics with tags , , on March 21, 2012 by telescoper

Courtesy of the BBC Webshite.

Posted in Uncategorized on March 21, 2012 by telescoper

Elsevier redefines the meaning of “free”…their open access articles in fact cost over £10 each to download.

Mike Taylor's avatarSauropod Vertebra Picture of the Week

Well, I’ve spent a lot of time on this blog trying to determine what the terms are for Elsevier’s elective open-access articles — what they term “Sponsored Articles“.  [For anyone who needs to catch up: part 1, part 2, part 3, unofficial part 3-and-a-bit, part 4.]

We are as far as ever from getting a good, clear, explicit statement like the one Springer provide on their “Open Choice” page (“all Open Choice articles are published under the Creative Commons Attribution (CC BY) license”.  There — that wasn’t so hard, was it?)  But we do have an important new nugget of information, thanks to a pair of tweets from Erin McKiernan (@emckiernan13).

We start at this page, the table of contents for Neuron 73(5).  Neuron is published by Cell Press, which is an imprint of Elsevier.  As you…

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A Style of Loving

Posted in Poetry with tags , , on March 21, 2012 by telescoper

Light now restricts itself
To the top half of trees;
The angled sun
Slants honey-coloured rays
That lessen to the ground
As we bike through
The corridor of Palm Drive.
We two

Have reached a safety the years
Can claim to have created:
Unconsummated, therefore
Unjaded, unsated.
Picnic, movie, ice-cream;
Talk; to clear my head
Hot buttered rum — coffee for you;
And so not to bed.

And so we have set the question
Aside, gently.
Were we to become lovers
Where would our best friends be?
You do not wish, nor I
To risk again
This savoured light for noon’s
High joy or pain.

by Vikram Seth (b. 1952).

Cosmology, Escher and the Field of Screams

Posted in Art, Education, The Universe and Stuff with tags , , , , , on March 20, 2012 by telescoper

Up early this morning for yet another busy day I thought I’d post a quick follow-up to my recent item about analogies for teaching physics (especially cosmology).

Another concept related to the cosmic microwave background that people sometimes have problems understanding is that of last scattering surface.

Various analogies are useful for this. For example, when you find yourself in thick fog you may have the impression that you are surrounded by an impenetrable wall at some specific distance around you. It’s not a physical barrier, of course, it’s just the distance at which there sufficient water droplets in the air to prevent light from penetrating further. In more technical terms the optical depth of the fog exceeds unity at the distance at which this wall is seen.

Another more direct analogy is provided by the Sun. Here’s a picture of said object, taken through an H-α filter..

What’s surprising to the uninitiated about an image such as this is that the Sun appears to have a distinct edge, like a solid object. The Sun, however, is far from solid. It’s just a ball of hot gas whose density and temperature fall off with distance from its centre. In the inner parts the Sun is basically opaque, and photons of light diffuse outwards extremely slowly because they are efficiently scattered by the plasma. At a certain radius, however, the material becomes transparent and photons travel without hindrance. What you see is the photosphere which is a sharp edge defined by this transition from opaque to transparent.

The physics defining the Sun’s photosphere is much the same as in the Big Bang, except that in the case of the Sun we are outside looking in whereas we are inside the Universe trying to look out. Take a look at this image from M.C. Escher:

The universe isn’t actually made of Angels and Demons – at least not in the standard model – but if you imagine you are in the centre of the picture  it nicely represents what it is like looking out through an expanding cosmology. Since light travels with finite speed, the further you look out the further you look back into the past when things were denser (and hotter). Eventually you reach a point where the whole Universe was as hot as the surface of a star, this is the cosmic photosphere or the last scattering surface, which is a spherical surface centred on the observer. We can’t see any further than this because what’s beyond is hidden from us by an impenetrable curtain,  but if we could just a little bit further we’d see the Big Bang itself where the density is infinite, not as a point in space but all around us.

Although it looks like we’re in a special place (in the middle) of the image, in the Big Bang theory everywhere is equivalent; any observer would see a cosmic photosphere forming a sphere around them.

And while I’m on about last scattering, here’s another analogy which might be useful if the others aren’t. I call this one the Field of Screams.

Imagine you’re in the middle of a very large, perhaps infinite, field crammed full of people, furnished with synchronised watches, each of whom is screaming at the top of their voice. At a certain instant, say time T, everyone everywhere stops screaming.

What do you hear?

Well , you’ll obviously  notice that it gets quieter straight away as the people closest to you have stopped screaming.  But you will still hear a sound because some of the sound entering your ear set out at a time before t=T. The speed of sound is 300 m/s or so, so after 1 second you will still hear the sound arriving from people further than 300 metres away. It might be faint, but it would be there. After two seconds you’d still be hearing from people further than 600 metres away,. and so on. At any time there’ll be circle around you, defined by the distance sound can have travelled since the screaming stopped – the Circle of Last Screaming. It would appear that you are in the centre of this circle, but anyone anywhere in the field would form the same impression about what’s happening around them.

Change sound to light, and move from two dimensions to three, and you can see how last scattering produces a spherical surface around you. Simples.

 

Nora the Piano Cat

Posted in Music with tags , , , on March 19, 2012 by telescoper

A busy day, filled with meetings meetings and more meetings. Time to relax with some music. This is a complete performance of a work by Mindaugas Piecaitis, featuring Nora the Piano Cat….