Archive for March, 2016

Akhnaten at ENO

Posted in Opera with tags , , , , , , , , on March 12, 2016 by telescoper

Having had a very stressful time at work over the last few days I decided on the spur of the moment to treat myself to a night at the Opera. The hottest tickets in London right now are for English National Opera’s new production of Akhnaten, by Philip Glass, but I managed to get one for Thursday night’s performance. I’m so glad I did, as it really lived up to the the reviews.

The Opera Akhnaten, which had its world premiere in 1983, is based on a real historical figure, Akhenaten, who ruled Egypt over 3300 years ago. Act I begins with the funeral rites of his father Amenhotep III, his son’s installation as Pharaoh Amenhotep IV and the beginning of his 17-year reign alongside his wife Nefertiti.

Roughly five years into his rule, however, Amenhotep IV changed his name to Akhenaten and set up a new, monotheistic religion, in which the Aten (the disk of the Sun) represented the supreme divine influence. Not content with that, he decided to up sticks from the city of Thebes (modern-day Luxor) and found a new city called Amarna in the desert. Act II is set in the Amarna period. It seems that, although Akhnaten had revolutionary ideas about religion, the costs of establishing this new way of life, and the resentment it caused among advocates of the old order, put strain on the kingdom of Egypt. In Act III we find Akhnaten and his family in a state of total detachment from the reality of the disintegration of his empire. Ailing and  beset by hostile forces, Akhnaten eventually dies.

After Akhnaten’s death the Amarna project was abandoned, as was the new religion, and the 18th Dynasty resumed with the enthronment of Akhnaten’s son, a young boy by the name of Tutankhamun. Very little remains of the City of Amarna and there seems to have been a systematic attempt to eradicate Akhnaten from historical memory. One suspects that the priests of the old religion played a not inconsiderable role in these developments.

But  Glass’s Akhnaten is more of a reflection or meditation on this extraordinary period than an attempt to depict it via a traditional historical narrative. His minimalist score also challenges the conventions of grand opera. The music develops only incrementally and the actors move in a correspondingly stylised fashion. Each act consists of a set of dreamlike tableaux mixing up the archaeological elements of the story with references to the modern world. In the first Act, for example, the funerary rites of Amenhotep IV involve characters in both ancient and modern dress to emphasize that death has been, and remains, a mystery for all cultures and civilisations.

It’s obviously an enormous challenge to bring such a work to the stage, but this production (developed in conjunction with the theatre company Improbable) rose to that challenge with great imagination. To counter the sense of stasis generated by the music, for example, there was a liberal influsion of brilliantly executed and extremely kinetic juggling. I knew there was going to be juggling  before the performance and had worried that it might be distracting, or even just a gimmick. In fact I think the juggling worked extremely well not only in the context of the opera but also in the context of history; some of the earliest depictions of juggling are from ancient Egypt. The costumes and lighting add even more to the spectacular visual  experience.

I don’t like all of Philip Glass’s music but I do think that Akhnaten is a masterpiece of minimalism. It’s full of subtle and interesting ideas but also extremely accessible, and it creates a strange hypnotic atmosphere which goes perfectly with this staging. The orchestra played the music well, though I felt the brass section could have played with a bit more “bite”, especially in the first Act. The ENO chorus was in excellent voice, as were all the principals: soprano Rebecca Bottone as Queen Tye (Akhnaten’s mother) and mezzo Emma Carrington as Nefertiti (Akhnaten’s wife) both sang extremely their demanding parts with great poise.

But I have to make special mention of Anthony Roth Costanzo as Akhnaten. He makes his first appearance on stage in Act I completely naked, walking slowly as if in a trance across a gallery and down the stairs in centre stage, and is then dressed in the garb of a Pharoah. His appearance then – slim, athletic, definitely masculine, and I have to say not inconsiderably sexy – contrasts with his increasingly androgynous appearance later on. But it  is his stage presence and the truly remarkable quality of his singing that I will remember.

Akhnaten

Akhnaten attempts to commune with the Aten. Picture credit: Guardian

Despite all I have written about the juggling and other aspects of the staging, for me the most powerful scene of the Opera is the last scene of Act II which is effective primarily for its simplicity. Here Akhnaten sings a longish aria in the form of Hymn to the Aten, which is based on an ancient text but bearing striking resemblance to Psalm 104 (a point underlined when the chorus sings Psalm 104, in Biblical Hebrew, offstage afterwards).This is the only part of the text sung in English; the rest is in a mixture of Aramaic, Akkadian and Hebrew. Constanzo’s rendition of the Hymn was stunningly beautiful, the clarity of his voice giving it a childlike sense of wonder. Akhnaten then walks slowly up a staircase in front of a representation of the Aten (above), then turns towards it and reaches out with both arms in an attempt to touch it, but he can’t reach it. He turns to face the audience, a desolate expression on his face, and the curtain falls on Act II.

That moment is so poignant because it spells out the universal nature of Akhnaten’s tragedy. His downfall seems inevitable from that point. He tries, as we all do in one way or another, and at some time or another, to commune with something beyond human existence. Inevitably, he fails, and his obsession costs him not only his kingdom, but also his life.

 

A Potential Problem with a Sphere

Posted in Cute Problems with tags , , on March 9, 2016 by telescoper

Busy busy busy again today so I thought I’d post a quick entry to the cute problems folder. I set this as a problem to my second-year Theoretical Physics students recently, which is appropriate because I encountered it when I was a second-year student at Cambridge many moons ago!

Sphere_problem

HINT: You can solve this by finding the general solution for the potential at any point inside the sphere, but that isn’t the smart way to do it!

FURTHER HINT: The question asks for the Electric Field at the origin. What terms in the solution for the potential can contribute to this?

Answers through the comments box please!

OUTLINE SOLUTION: A numerically correct answer has now been posted so I’ll give an outline solution. The potential V inside the sphere is governed by Laplace’s equation, the general solution of which is a series expansion in powers of r and Legendre polynomials, i.e. rn Pn(θ). The coefficients of this expansion can be determined for the given boundary conditions (V=V0 at r=a for θ = +1, V=0 for cos θ = -1). However this is a lot more work than necessary. The question asks for the electric field, i.e. the gradient of the potential, and if you look at the form of the potential there is only one term that can possibly contribute to the field at r=0, namely the one involving rP1(cosθ) =rcos θ (which is actually z). Any higher power of r would give a derivative that vanishes at the origin. Hence we just have to determine the coefficient of one term. Using the orthogonality properties of the Legendre polynomials this can easily be seen to be 3V0/4a. The electric field is thus -3V0/4a in the z-direction, i.e. vertically downwards from the top of the sphere.

Women Printers

Posted in Uncategorized on March 8, 2016 by telescoper

Fascinating piece from my old college…

magdlibs's avatarMagdalene College Libraries

To celebrate International Women’s Day 2016 on the blog, we are showcasing the work of female printers of the 17th century in the Pepys Library.

In early modern England, the printing industry was not altogether a male preserve: between 1550 and 1650, it is estimated that 130 women in Britain were working actively in the printing trade. It was common for women printers to work alongside men in the printing houses of convents or with family members and spouses, and it was usual for them to marry within the trade. Amongst the books in Magdalene’s historic libraries, one can find the names of women printers on the imprints of title pages.  Some are referred to by their marital status, such as ‘Widow Sayle’ ‘Widow of J. Blageart’ and the ‘widowe of Richarde Iugge’, others, by their full names such as Alice Norton, Elizabeth Purslowe, Mary Clark and Hannah Allen.

It…

View original post 412 more words

All of Me – Billie Holiday & Lester Young

Posted in Jazz with tags , , , on March 8, 2016 by telescoper

After an even more stressful day than usual I decided to have a quick look at Youtube before going home. That’s how I found this rare and priceless gem. It’s a wonderful performance of All of Me featuring one of the greatest combinations of musical talent in Jazz history, Billie Holiday and Lester Young, but it’s a discarded track that was never released on record. “Why would anyone discard such a masterpiece?”, I hear you ask. Well, that’s simply because it ran over the three minutes that could fit onto an old-style 78rpm disk. The reason it is too long is that there’s more than the usual ration of Lester Young’s tenor saxophone, in the form of a superb extended solo that is so beautiful it brought tears to my eyes. This is as perfect a performance as you could hope to hear, but it is brought back down to Earth at the end by the recording engineer whose only comment from the box when the exquisite music subsides is “It’s a bit long”…

 

 

 

If Dick van Dyke tried a Geordie accent…

Posted in Television with tags , , on March 8, 2016 by telescoper

…it couldn’t be any less accurate than this effort from the US TV series The Castle:

 

Could this be the worst attempt at a regional accent ever recorded?

 

 

 

 

The Ways We Touch

Posted in Mental Health, Poetry on March 8, 2016 by telescoper

Have compassion for everyone you meet,
even if they don’t want it.
What appears bad manners, an ill temper or cynicism
is always a sign of things no ears have heard,
no eyes have seen.
You do not know what wars are going on down there where the spirit meets
the bone.

by Miller Williams (1930-2015)

 

A Galaxy at Redshift 11.1?

Posted in The Universe and Stuff with tags , , , on March 7, 2016 by telescoper

Back in the office after one Friday off and there’s the inevitable queue at my door and mountain of things that just have to be done immediately. Yeah, right..

Anyway, I couldn’t resit a short blogging break to mention a bit of news that made a splash last week. This is the claim that a galaxy has been observed at a redshift z=11.1 which, if true, would make it the most distant such object ever observed. When I was a lad, z=0.5 was considered high redshift!

If the current standard cosmological model is correct then the lookback time to this redshift is about 13.4 billion years, which means that the galaxy we are seeing formed just 400 million years after the Big Bang. If it is correctly identified then it has to be an object which is forming stars at a prodigious rate. You can find more details in the discovery paper (by Oesch et al.)  here.

I have taken the liberty of extracting the following figure:

Grism

The claim is that the model spectrum on the top right is a much better fit to the data obtained using the Hubble Space Telescope Grism spectrograph than the two alternatives at much lower redshift. However, this depends a great deal on having a good model for the significant contamination from other sources. Moreover I’m sure the residuals are non-Gaussian and I’m not therefore convinced that a simple χ2 is the best way to assess the fit. Obviously I’d like to see a proper Bayesian model comparison!

So, as I have been on previous occasions (e.g. here), I remain not entirely convinced. But then I’m a theorist who is always excessively suspicious of data. Any experts out there want to tell me I’m wrong?

 

Big Cuts to UK Science Research

Posted in Science Politics with tags , , , on March 4, 2016 by telescoper

I have been off sick today, but felt a whole lot sicker when I saw that the government had unveiled its plans for UK research spending over the next few years.

At first sight the picture looks encouraging. For example, the Science and Technology Facilities Council (STFC) sees a modest increase on cash terms from 16/17 to the end of the budget period. However that picture soon changes when you note that the allocation to STFC this year (15/16) was £400M. The allocation for (16/17) is £388M, so there’s an immediate reduction of £12M in available resource corresponding to a 3% cash cut.

This is  a truly terrible result for the STFC community. It may not seem like a big cut, but so much of the STFC budget is locked up in subscriptions that cash cuts have a disproportionately damaging effect. I fear for grant funding in particular; that’s always what takes the hit when immediate savings are needed.

It seems clear to me that a deliberate decision was made in BIS to exclude the current year’s figures from their document in a cynical attempt to present a misleading picture of the settlement. It’s a shocking betrayal.

Here is a response from the Royal Astronomical Society.

The unwillingness of our own government to fund scientific research property demonstrates how vitally important it is for us to have access to European Union funding and will strengthen the determination of UK scientists to keep us in the EU.

Cosmology at MaxEnt in Ghent

Posted in Talks and Reviews, The Universe and Stuff on March 3, 2016 by telescoper

It seems I am an invited speaker at MaxEnt 2016, the 36th Workshop on Bayesian Inference and Maximum Entropy Methods:

maxent

As well as talking about some of my own research I’ve been asked to include a bit of a review in my presentation. I haven’t quite decided what background stuff to include so thought a bit of crowdsourcing was called for. Anyone got any suggestions for important Bayesian/Maximum Entropy developments in cosmology?

If so, please offer them through the comments box!

P.S. Anyone know where Ghent is?

In Praise of Student-Led Teaching Awards

Posted in Education with tags , , on March 2, 2016 by telescoper

Only time for a short post today. I was at a lunchtime meeting involving both staff and students in the School of Mathematical and Physical Sciences this lunchtime, and one item on the agenda was the University of Sussex student-led teaching awards scheme, which is run jointly by the University and the Student Union.

This reminded me of an article in last week’s Times Higher which argues that such awards are “divisive” and leave staff who don’t win such awards “demoralised”.

I suppose such awards are “divisive” in the sense that they divide staff into two categories: those that win and those that don’t. The same is true of any award. You might equally well argue that we shouldn’t award degrees to students on the grounds that some students get them and others don’t.

The negative feelings expressed about these awards seem to me to be more to do with sour grapes than with any genuine concern about the effect (or lack of effect) they might have on teaching quality. Staff who are upset that they don’t win an award would be better advised to learn from their more popular colleagues than expressing resentment towards them.

Another thing that annoys me about this criticism is that it assumes that it questions the motivations for students nominating lecturers; in particular that students pick lecturers who are “showy” or “entertaining” or who set easy examinations. In my opinion this assumption does a great disservice to students. Last year several staff in my School won such awards and it was quite clear that the students picked the staff concerned because they appreciated their approach to teaching, not that their courses were easier or for any other trivial reason. It’s more than a little arrogant for staff to assume that students aren’t qualified to comment on what teaching they like.

It’s over thirty years since I finished my undergraduate degree. In the intervening time the way students study at school and university has changed, partly because of new technology. I hear far too many lecturers demanding that students should learn the way they did when they were younger. We should always be looking for better ways of helping students learn, and I think student awards are one way of identifying examples of good practice.

So, to conclude, I think this complaint is tosh.

Feel free to disagree through the comments box!