Jacques Loussier Before Seven

Posted in Music with tags , on February 23, 2016 by telescoper

This morning, as usual, I was woken this morning by the breakfast programme on BBC Radio 3. There is a regular slot called Bach Before Seven which I always listen to despite the risk of harpsichords. This morning I was delighted that the choice was an arrangement of Brandenburg Concerto No. 3 by Johann Sebastian Bach played by the Jacques Loussier Trio. It might have been a much for some classical purists, but I liked it a lot.  Bach’s music is so beautifully constructed that it can stand being pulled around in all sorts of ways.

If you’re of a certain age (like) me you might  also remember that happiness is a cigar called Hamlet but not remember who played the tune. It was, fact, Jacques Loussier and his trio doing their take on the so-called Air on the G String, also by  Johann Sebastian Bach And before you get too sanctimonious and music-hysterical about this version, I’ll just add that it is well known that Bach enormously enjoyed improvisation. Many jazz musicians of my acquaintance really love Bach’s music, and I have a sneaking feeling the great man would have enjoyed this take on his composition!

Ps. Coincidentally Sunday’s Azed crossword offered this clue for 19 down:

“One re-interpreting Bach, central duo halved, more unsatisfactory (7)”

 

Geometry, by Rita Dove

Posted in Poetry with tags , , on February 23, 2016 by telescoper

I prove a theorem and the house expands:
the windows jerk free to hover near the ceiling,
the ceiling floats away with a sigh.

As the walls clear themselves of everything
but transparency, the scent of carnations
leaves with them. I am out in the open

and above the windows have hinged into butterflies,
sunlight glinting where they’ve intersected.
They are going to some point true and unproven.

by Rita Dove

 

Why the EU is Vital to UK Science

Posted in Politics, Science Politics with tags , , , on February 22, 2016 by telescoper

The EU referendum campaign may only just have started but already there have been deliberate attempts to mislead the electorate about the realitites of  EU membership. I know that people will consider a wide range of issues before casting their vote in the forthcoming referendum. I am glad there is to be a referendum because there is at least a chance that some truth will emerge as these topics are discussed publicly over the next four months.

My views on the wider questions raised by the referendum are of no greater value than anyone else’s so I am going to restrict myself here to one issue that I do know something about: the importance of continued EU membership to UK Science. Before going on I will state, for the record, that I am not in receipt of any grants or other income from the EU. Not that this should matter. I deeply resent the snide implications of the “out” campaign that  ERC or other EU grants represent some form of gravy train. They don’t. Such awards are highly competitive and subject to strict accounting rules. They are used to fund research not to generate personal wealth. Scientists are not bankers.

Anyway, I believe that it would be a disaster for science if the UK were to quit the EU. In the Department of Physics & Astronomy at Sussex around one-quarter of our research income comes via the EU. Without that cash we would have to make drastic cuts which would certainly lead to redundancies. And I don’t for one minute believe that such funding would be replaced by increases from the UK government. It has been a hard slog just to get level cash settlements for science over the last two Parliaments, and that has led to steady real-terms attrition of support for scientific research. Meanwhile, the EU has, wisely for the future of the European economy, been increasing its science budget in real terms. Many research groups are only viable because of the EU’s strategic vision. We have in front of us the very real prospect of the devastation of our science base if Brexit becomes a reality.

But it’s not just about loss of funding. It’s also about the loss of influence. The UK benefits from EU membership because it has representatives around the table when funding priorities are decided. We provide scientific leadership to many projects, which reflects well on our reputation in the world and attracts significant inward investment. This loss of influence is, of course, not only the case for science but also for other areas of policy. The “out” campaign’s desire for isolationism would leave Britain with even less influence on its own destiny than it has now.

Of course these are personal views and you are free to disregard them. On the other hand, they are also the views of most UK scientists. Here are the key conclusions of  a recent survey and report:

  • 93% of researchers asked in the CaSE and EPC survey agreed that EU membership is a major benefit to UK.
  • Some regions of the UK are more dependent than others on EU funding in maintaining research capacity and infrastructure, and as a result could suffer disproportionate adverse impacts if this source was withdrawn.
  • The ability to attract academic staff to the UK through free movement of labour is important, particularly in science and engineering.
  • The role and benefits of EU membership to UK research is considered by researchers to be broader than just the funding for research that EU projects bring to the UK. The improvement in quality, reach and impact, facilitated by EU collaboration and coordination, helps to solve “Grand Challenge” problems in a way that would be much harder for any one country to achieve alone.

My only surprise with these survey results is that the fraction quoted in the first bullet point is as low as 93%. In my experience strong support for the EU is practically universal amongst scientific researchers across the entire spectrum of disciplines.

I realise science funding is unlikely to be the decisive issue for many people when it comes to casting their vote, but it is a topic I feel strongly about and it angers me greatly when campaigners deliberately misrepresent the view of real scientists. That is one of the reasons why I am a strong supporter of Scientists for the EU and I shall be campaigning strongly for Britain to remain at the heart of a Europe committed to science for the benefit of all its citizens.

 

Uncompromising Expression

Posted in History, Jazz with tags , on February 21, 2016 by telescoper

I don’t get much time for self-indulgence these days, but last week I treated myself to this book:

image

Written by Richard Havers, this is an excellent illustrated history of the legendary record label, Blue Note. Although primarily associated with post-war Jazz, Blue Note began with a number of classic recordings from the era of Sidney Bechet, Edmond Hall and Bunk Johnson.

I have only had time to dip into it so far, but what I have seen is superb, not only in terms of the text but also copious examples of the artwork that gave Blue Note albums their distinctive look.

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Uncompromising Expression is a must- have for Jazz fans, although at just under £50 it’s not cheap. Fortunately I got a book token for Christmas!

The EU Referendum last time around (1975)

Posted in Uncategorized on February 20, 2016 by telescoper

Do you remember the last time we had a referendum on Europe, in 1975? I do. Most Tories were vociferously in favour then. I was only 12 so couldn’t vote, but I would have voted No then largely on the grounds that Ted Heath had taken us in without bothering to consult. Now, 40 years on, I have grown up a bit and I am convinced that on balance our membership of the EU is a good thing for Britain and to leave now would jeopardise our economic and social wellbeing.

kmflett's avatarKmflett's Blog

The EU Referendum last time around (1975)

Thatcher 9 April 1975

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The Wilson Government’s Referendum on Britain’s EU membership was held 41 years ago on 5th June 1975. Given that Britain is set to have a further Referendum on the matter June 23rd you might think that the 1975 Referendum would be of some media note. However the media continues to be very bad at history. It requires things like research and fact checking, not matters there are big in the 2016 media not least because of resources.

The result in case (most likely) you are too young to remember or have simply forgotten was a fairly decisive vote to stay in the EU. The idea of a Referendum had been developed at least in part by Tony Benn. He saw it as a way in general of extending popular participation in politics and also specifically a way of getting round deep ‘no’…

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75 Years of the Maltese Falcon

Posted in Film with tags , , on February 18, 2016 by telescoper

The other day I came across the interesting news that my favourite film, The Maltese Falcon, directed by John Huston, is being shown in “movie theaters” around the United States on 21st and 24th February to celebrate the 75th anniversary of the film’s release. The choice of dates is a little odd because the film actually premiered in October 1941, but I presume the timing is dictated by business considerations. Although I have seen this film many times on TV and on DVD I have never seen it in a cinema, and I hope there is a possibility I can do so somewhere in the UK this year. Here is the original trailer as shown in cinemas back in the day. I imagine that the sizeable frame of Sidney Greenstreet made quite an impression on movie-goers as he loomed out of the darkness!

 

Jazz at the Pawnshop

Posted in Jazz with tags , , , , , on February 17, 2016 by telescoper

Sometime in the late Seventies I bought a vinyl LP called Jazz at the Pawnshop, which featured live performances by four veterans of the Swedish Jazz scene; Arne Domnerus (alto saxophone), Bengt Hallberg (piano), Egil Johansen (drums) and George Riedel on bass. Sadly, three of the four musicians involved are no longer with us; only George Riedel is still alive, but at least their music lives on.

The content was recorded in Stockholm over two days in December 1976 at a Jazz club on a site where a pawnshop once stood, hence the name. The album was reissued on CD in 1996 and then, just last year, somebody posted it on Youtube. That gives me an excuse to share my favourite track, which features the band not playing one of the classic bebop tunes on which  they cut their teeth when they were young, but the Lil Hardin composition from a much earlier era Struttin’ with some Barbecue which was something of a vehicle for her husband, Louis Armstrong. Not, ‘Strittin’ by the way as it says on the Youtube link.

I loved this track from the moment I first heard it, from the intriguing out-of-tempo opening through a jaunty bossa nova passage, and evolving into an extended improvised exploration by Domnerus set against typically bebop-inspired patterns from the rhythm section. Modern jazz treatments of tunes from the classic era don’t always turn out well, but this one surely did. Enjoy!

 

 

 

Making Massive Black Hole Binaries Merge

Posted in The Universe and Stuff with tags , , , , , on February 16, 2016 by telescoper

Many fascinating questions remain unanswered by last week’s detection of gravitational waves produced by a coalescing binary black hole system (GW150914) by LIGO. One of these is whether the fact that the similarity of the component masses (29 and 36 times the mass of the Sun respectively) is significant.

An interesting paper appeared on the arXiv last week by Marchant et al. that touches on this. Here is the abstract (you can click on it to make it larger):

BinaryBH

 

Although there is some technical jargon, the point is relatively clear. It appears that very masssive, very low metallicity binary stars can evolve into black hole binary systems via supernova explosions without disrupting their orbit. The term ‘low metallicity’ characteristises stars that form from primordial material (i.e. basically hydrogen and helium) early in the cycle of stellar evolution. Such material has very different opacity properties from material with significant quantities of heavier elements in it, which alters the dynamical evolution considerably.

(Remember that to an astrophysicist, chemistry is extremely simple. Hydrogen and helium make up most of the atomic matter in the Universe; all the rest is called “metals” including carbon, nitrogen, and oxygen…. )

Anyway, this theoretical paper is relevant because the mass ratios produced by this mechanism are expected to be of order unity, as is the case of GW150914.  One observation doesn’t prove much, but it’s definitely Quite Interesting…

Incidentally, it has been reported that another gravitational wave source may have been detected by LIGO, in October last year. This isn’t as clean a signal as the first, so it will require further analysis before a definitive result is claimed, but it too seems to be a black hole binary system with a mass ratio of order unity…

You wait forty years for a gravitational wave signal from a binary black hole merger and then two come along in quick succession…

 

 

 

Mathematics at Sussex – The Videos

Posted in Uncategorized with tags , on February 16, 2016 by telescoper

A while ago I posted some videos featuring students in the Department of Physics & Astronomy at the University of Sussex. Here are a few more about the other side of the School of Mathematical and Physical Sciences, i.e. the Department of Mathematics. The first is a general video about the Mathematics BSc programme generally and the other two feature current students (one undergraduate, one postgraduate) talking about their courses and the environment for students here.

 

 

 

 

 

 

Feynman Diagrams for Beginners

Posted in Uncategorized on February 15, 2016 by telescoper

And now for something completely different. I noticed on the arXiv a recent post with the following abstract:

We give a short introduction to Feynman diagrams, with many exercises. Text is targeted at students who had little or no prior exposure to quantum field theory. We present condensed description of single-particle Dirac equation, free quantum fields and construction of Feynman amplitude using Feynman diagrams. As an example, we give a detailed calculation of cross-section for annihilation of electron and positron into a muon pair. We also show how such calculations are done with the aid of computer.

The paper is indeed very nice and I recommend it to students everywhere. I had to teach myself what quantum field theory I know (which isn’t much) and I certainly wish I’d had an introduction like this to work through the examples!

In elementary courses on elementary particles Feynman diagrams are often presented as mere “cartoons” illustrating particular scattering or other processes, and they can play that role very usefully, but they are actually much more than that: they provide a neat and potentially very powerful way of doing real calculations.

Anyway, here’s an illustration:

Feynman