A night Out with Nigel Owens

Posted in LGBT, Rugby with tags , , , on February 21, 2017 by telescoper

I’ve had a busy morning teaching and a busy afternoon meeting some interesting people from IBM and elsewhere in connection with Data Innovation Institute business, so just time to mention that I’m looking forward tonight to an event at Cardiff Metropolitan University (whose campus is not far from my house) featuring renowned rugby referee Nigel Owens who, in case you hadn’t realized, is gay. The event is part of the celebrations in Cardiff of LGBT History Month.

I’ll update later with reflections on the evening, but in the meantime here’s some examples of him in action on the rugby field!

Update: it was a thoroughly absorbing evening. Nigel Owens spoke extremely engagingly (and without notes) about his upbringing in a small village  in rural Wales, his mental health struggles as he tried to come to terms with his sexuality, a (nearly successful) suicide attempt when he was in his twenties, and how his decision to come out publicly revitalised his career as an international referee. 

When he takes to the field on Saturday to officiate at the Six Nations match between Ireland and France, it will be his 75th international match as a referee, which is the most for any referee ever.

 

People are not “Bargaining Chips”

Posted in Politics with tags , , , on February 20, 2017 by telescoper

Today there has been a day of action under the banner of “One Day Without Us” to celebrate the contribution that migrants make to the United Kingdom and to the counter growing tide of racism and xenophobia associated with some elements of the recent campaign for this country to leave the European Union. Here’s a video produced by the campaign.

I wish to make it clear, as someone who was born in the United Kingdom, that I am appalled by the present government’s refusal to guarantee the rights of the millions of EU citizens who have made this country their home and enriched us all with their presence here. Migrants have had a positive effect over all sectors of the UK economy for a very long time, but I wish to highlight from my own experience the enormous contribution “migrants” – or as I prefer to call them “colleagues” – make to our Universities. Non-UK scientists form the backbone of the School of Physics & Astronomy here at Cardiff, just as they did in the School of Mathematical and Physical Sciences at the University of Sussex. Without them I don’t know how we’d carry on.

Now the Article 50 Bill has begun its progress through the House of Lords, I hope that it can be amended to force the government to stop treating such valuable people in such a despicable way. In the meantime all I can do – and I know it’s only a gesture – is say that the government does not speak for me, or for any of my colleagues, and that I hope and believe that it will be made to abandon its repellent notion that people can be treated like bargaining chips.

The Mower, by Philip Larkin

Posted in Poetry with tags , , , on February 20, 2017 by telescoper

The mower stalled, twice; kneeling, I found
A hedgehog jammed up against the blades,
Killed. It had been in the long grass.

I had seen it before, and even fed it, once.
Now I had mauled its unobtrusive world
Unmendably. Burial was no help:

Next morning I got up and it did not.
The first day after a death, the new absence
Is always the same; we should be careful

Of each other, we should be kind
While there is still time.

by Philip Larkin (1922-1985)

 

Not the Six Nations

Posted in Biographical, Rugby with tags , , , , on February 18, 2017 by telescoper

After a misty morning it has turned into a lovely Spring-like afternoon here in Cardiff. I’ve been in the School of Physics & Astronomy at Cardiff University this morning, helping out with a UCAS visit day by interviewing some prospective students and then having lunch and chatting with parents and others.

As well as the weather and the admissions season, another indication of the passage of the seasons is the Six Nations rugby. Our Saturday UCAS visit days have to be arranged with the RBS Six Nations fixture list in mind because Cardiff gets incredibly busy when Wales are playing at home. The capacity of the Millennium Principality Stadium is well over 80,000 which, for a City with a population of just over 300,000 represents a huge perturbation. 

Not only is there a lot of traffic and a very crowded city centre, but it’s also very difficult to find hotel accommodation at a reasonable price on match weekends.  Given that we start in the morning, quite a few prospective students and their families do stay overnight beforehand so this is quite an important consideration. There are no fixtures in the RBS Six Nations this weekend. Today two of my interviewees had travelled quite a long way to get to Cardiff – one from Richmond in North Yorkshire and another from Falmouth in Cornwall – and both families stayed over last night.

Anyway, while I’m not talking about the Six Nations I can’t resist mentioning last week’s match here in Cardiff between Wales and England. I didn’t have a ticket. I’ve ever really figured out how to get tickets for these matches. They always seem to be completely sold out as soon as they go on sale.

Before the match, I thought it was going to be a close game but Wales always have tremendous home advantage at Cardiff and I thought they might just sneak it. It was a rather dour struggle to be honest, but with less than ten minutes to go Wales were leading 16-14 and my suspicions seemed about to be confirmed. However, as is often the case with close matches, it was an error that produced the decisive moment.

About five metres out, Wales turned possession over and then rucked successfully, the ball eventually going to Jonathan Davies behind his own try line. With half of his team trying to disentangle themselves from the completed ruck, it was essential for him to clear his lines by kicking into touch. Unfortunately, he kicked straight down the field where his kick was collected by George Ford. England’s counter-attack was swift and lethal: Ford to Farrell and then to Elliott Daly on the wing, who went over for the try to the sound of groans all round Cardiff. After the conversion it was Wales 16 England 21, which is how the game ended a few minutes later.

The results of the other games so far mean that the only team capable of winning a grand slam is England, as each of the other teams has lost at least one game. There’s still a long way to go, however, and England still face challenging matches against Ireland and a much-improved Scotland.

Anyway, all this UCAS malarkey means that I’m way behind on Saturday crossword duties, so I’m going home. Toodle-pip.

Emergent gravity in galaxies and in the Solar System [GA]

Posted in The Universe and Stuff with tags , , on February 17, 2017 by telescoper

I’ve been meaning to do a blog post about Erik Verlinde’s  very interesting “Emergent Gravity” theory since it was first aired in November 2016, but never got round to it. However, this recent paper suggests that the new theory fails badly on scales of the Solar System. And when I say “badly”, I mean by seven orders of magnitude. That’s pretty bad.

Unless there’s something wrong with this analysis, this looks pretty terminal …

arXiver

http://arxiv.org/abs/1702.04358

It was recently proposed that the effects usually attributed to particle dark matter on galaxy scales are due to the displacement of dark energy by baryonic matter, a paradigm known as emergent gravity. This formalism leads to predictions similar to Modified Newtonian Dynamics (MOND) in spherical symmetry, but not quite identical. In particular, it leads to a well defined transition between the Newtonian and the modified gravitational regimes, a transition depending on both the Newtonian acceleration and its first derivative with respect to radius. Under the hypothesis of the applicability of this transition to aspherical systems, we investigate whether it can reproduce observed galaxy rotation curves. We conclude that the formula leads to marginally acceptable fits with strikingly low best-fit distances, low stellar mass-to-light ratios, and a low Hubble constant. In particular, some unobserved wiggles are produced in rotation curves because of the dependence of the transition on the…

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Le Vin herbé

Posted in Opera with tags , , on February 17, 2017 by telescoper

Last night I went to the Wales Millennium Centre in Cardiff for the opening night of Welsh National Opera’s new production of Le Vin herbé  by Swiss-born composer Frank Martin. This isn’t a work with which I was previously familiar so I wasn’t sure what to expect, but then that’s why I usually particularly hard to get to see departures from the standard repertoire. It’s not that I’m at all bored with Mozart, Puccini et al but that it’s always good to keep an ear open for new things.  In fact there is only one performance of this piece in Cardiff this year before it goes on tour. Fortunately I was able to make it.

Le Vin herbé is based on the story of Tristan and Iseult ; the title refers to the potion that the two lead characters accidentally drink which makes them fall in love and thus betray King Mark of Cornwall, who is Tristan’s uncle and Iseult’s husband-to-be. Naturally tt all ends in disaster, with the two lovers both dying. But if the story makes you think of Wagner’s epic operatic telling of this legend, Tristan und Isolde then you need to think again, as this is a very different piece. Le Vin herbé is a much more intimate work, with a relatively small case and a band of just eight musicians (a piano and seven string players) who, in this production, were at centre stage throughout the performance rather than in the pit. The main characters are played by tenor Tom Randle (Tristan) and soprano Caitlin Hulcup (Iseult) – both of whom were brilliant – and some of their lines are also sung by the chorus and there are also solo storytellers to provide bits of the narrative. The set and staging is very minimal. In fact it’s more of a chamber oratorio than an Opera. Also the entire performances lasts under two hours, with no interval. Quite a lot shorter than Wagner’s version!

I think the instrumental music by Frank Martin is very fine indeed, and very well played by the musicians directed by James Southall, and the principals and chorus were in good voice. Having said that I think Martin’s writing for voices is less successful. The vocal lines consciously evokes mediaeval plainsong, which works quite well for the chorus but makes it difficult for the soloists to generate any melodic drive. It’s not helped by the libretto either, which is rather dry and undramatic. On the way home from the performance I couldn’t help wondering what it might have been like had the text been in mediaeval Latin! The staging was at times effective: some of the scenes between Tristan and Iseult were very moving, but the stage was too busy and confusing when the whole chorus got involved.

This probably sounds very critical, but I don’t mean it to be. There’s much to enjoy in this production, so I’d encourage you to go and form their own opinion. It’s on tour in Bristol, Milton Keynes, Llandudno, Plymouth and Southampton. Last night’s performance got a very warm reception from a pretty full house which, for an unusual work like this, is a very good sign.

A Blueprint for a Quantum Computer

Posted in The Universe and Stuff with tags , , , , on February 16, 2017 by telescoper

I’m a little bit late blogging about this topic, as it relates to a paper published on 1st February 2017, but it’s a pleasure to be able to draw your attention to an important paper by a group led by a former colleague of mine from the University of Sussex, Prof. Winfried Hensinger, known to his friends as “Winni”. In essence they have constructed a practical way to build a working quantum computer.

Here is the abstract of the latest paper which explains the significance of the work:

The availability of a universal quantum computer may have a fundamental impact on a vast number of research fields and on society as a whole. An increasingly large scientific and industrial community is working toward the realization of such a device. An arbitrarily large quantum computer may best be constructed using a modular approach. We present a blueprint for a trapped ion–based scalable quantum computer module, making it possible to create a scalable quantum computer architecture based on long-wavelength radiation quantum gates. The modules control all operations as stand-alone units, are constructed using silicon microfabrication techniques, and are within reach of current technology. To perform the required quantum computations, the modules make use of long-wavelength radiation–based quantum gate technology. To scale this microwave quantum computer architecture to a large size, we present a fully scalable design that makes use of ion transport between different modules, thereby allowing arbitrarily many modules to be connected to construct a large-scale device. A high error–threshold surface error correction code can be implemented in the proposed architecture to execute fault-tolerant operations. With appropriate adjustments, the proposed modules are also suitable for alternative trapped ion quantum computer architectures, such as schemes using photonic interconnects.

Here’s a short video explaining the setup

This result has generated a lot of good publicity for the group at Sussex, including a piece in the Financial Times and a personal appearance by Winni himself on Sky News.

It’s great to see the  Ion Quantum Technology group continuing to do really well and I’m sure the investments made in physics research at the University of Sussex over the last few years will bring even more exciting developments in the near future!