Author Archive

The Long Weekend

Posted in Books, Talks and Reviews, The Universe and Stuff with tags , , , , , on April 5, 2012 by telescoper

It’s getting even warmer in Cape Town as we approach the Easter vacation. The few clouds to be found in the sky over the last couple of days have now disappeared and even the mountain behind the campus has lost its white fluffy hat:

It’s going to be a busy weekend in these parts over the forthcoming weekend. As in the UK, tomorrow (Good Friday) is a national holiday and there will be a 5K fun run around the campus. The temporary stands and marquees you can see in the picture are associated with that. On Saturday there’s a really big event finishing there too – the Two Oceans Marathon – which will finish on the University of Cape Town campus. At the moment it’s 30 degrees, but the forecast is to cool down a bit over the holiday weekend. Good news for the runners, but not I suspect for everyone who’s disappearing off for a weekend at the beach!

Anyway, I did my talk this morning which seemed to go down reasonably well. It was followed by a nice talk by Roberto Trotta from Imperial College in a morning that turned out to be devoted to statistical cosmology. I didn’t get the chance to coordinate with Roberto, but suspected he would focus on in the ins and outs of Bayesian methods (which turned out to be right), so I paved the way with a general talk about the enormous statistical challenges cosmology will face in the era after Planck. The main point I wanted to make – to an audience which mainly comprised theoretical folk  – was that we’ve really been lucky so far in that the nature of the concordance cosmology has enabled us to get away with using relatively simple statistical tools, i.e. the power spectrum.This is because the primordial fluctuations from which galaxies and large-scale structure grew are assumed to be the simplest possible statistical form, i.e. Gaussian.  Searching for physics beyond the standard model, e.g. searching for the  non-Gaussianities which might be key to understanding the physics of the very early stages of the evolution of the Universe,  will be more difficult  by an enormous factor and will require much more sophisticated tools than we’ve needed so far.

Anyway, that’s for the future. Cosmological results from Planck won’t be freely available until next year at the earliest, so I think I can still afford to take the long weekend off  without endangering the “Post-Planck Era” too much!

By Gove, I agree!

Posted in Education with tags , , , on April 4, 2012 by telescoper

I never thought the day would come, but I have to admit it. I agree with Michael Gove. There. I said it.

Not with everything he says, of course. But I do think that universities should take over responsibility for the examinations required for University Entrance, currently known as A-levels. Here is an excerpt from an old post on this, and I’ve said much the same thing on several other occasions:

So what’s the solution? I think it is to scrap A-levels entirely, and give the system of pre-university qualifications over to the people who actually know what students need to know to cope with their courses, i.e. the universities. There should be a single national system of University Entrance Examinations, set and moderated by an Examination Board constituted by university teachers. This will provide the level playing field that we need. No system can ever be perfect of course, but this is the best way I can think of to solve the biggest problem with the current one. Not that it will ever happen. There are just too many vested interests happy with the status quo despite the fact that it is failing so many of our young people.

But lest you all think I’ve turned into a Conservative, let me point out that the fault with the current system is precisely that market forces have operated to the detriment of educational standards. The GCE examination boards compete for customers by offering easier and easier examinations each year, regardless of what students need to know to cope with University courses. What I advocate is renationalisation.  I bet Mr Gove doesn’t like it put that way…

Oh and another thing. I think universities should be given this task, but should also be paid for doing it just as the examination boards now are. That way it will not be treated as yet another imposition from the top, but an important task that has a similar status within a university as teaching and research.

Cape Town Connections

Posted in Biographical, Books, Talks and Reviews on April 4, 2012 by telescoper

Now I’m properly online and reconnected to the blogosphere. The problems I had yesterday turned out to be quite easy to resolve once I spoke to a competent person.

I’m staying here on the delightful campus of the University of Cape Town, where I’m visiting George Ellis and other cosmologists here with a view to setting up a collaborative project with them. The last time I was here was in 1995, and I came here to put the finishing touches to a book George and I wrote. At that time I don’t think there was much of an internet connection at all, so I had no distractions from the task in hand. Except, that is, for the Rugby World Cup which took place in South Africa at the same time. Which was not, if I’m being honest, a coincidence. I even managed to get a ticket for the semi-final between England and New Zealand which was held just down the road at Newlands and saw Jonah Lomu running amok as England got thrashed. New Zealand went on to lose to hosts South Africa in a tense final and the celebrations afterwards were something I’ll remember for a long time!

That was all during June/July, which is winter time here. Now it’s April. Technically speaking this is autumn, but the weather is sunny and warm although there are stiff breezes and scudding clouds. Not unusually, Table Mountain is wearing a white fluffy crown, as you can see from this picture I took this morning from the base of the stairs leading up towards the Jameson Memorial Hall and, to the right, the Mathematics department at UCT:

I realised yesterday that I’m staying in exactly the same flat (one of five at the UCT residence called Kopano), a short walk down the hill (or a long walk up it) from the guest office they’ve provided. When I started to walk up yesterday morning the memory of the route came back, apart from one or two new buildings which have inconveniently appeared on the way. I’m reassured that I still have some functioning memory cells!

Another connection I have with Cape Town is that my former PhD student Rockhee Sung has a PDRA position here. I’m looking forward to catching up with her again, although she’s not here at the moment owing to here having to sort out some problems with visas, etc.

Anyway, I have to give a talk tomorrow and since I’m going out for dinner tonight I had better prepare it this afternoon.

P.S. My commiserations to those of you back in Blighty who are shivering as the recent warm spell has been decisively ended by a cold snap, complete with snow. It seems I left at exactly the right time!

 

Normal service will be resumed as soon as possible…

Posted in Uncategorized on April 3, 2012 by telescoper

Well, after a 12 hour flight I finally made it to my destination – the fine city of Cape Town, in the Republic of South Africa. Uncannily I’m staying in the same flat on the UCT Campus that I lived in when I came here in 1995 to finish writing a book with George Ellis. I’ll just mention that it’s a sunny 25 degrees at the moment!

Unfortunately I haven’t yet got any proper internet access sorted out, so I’m just posting this brief update via my Blackberry.

I hope to get connected soon and will add reports and pics of this lovely city, if and when it’s possible.

 

Flying at Night

Posted in Poetry with tags , , on April 2, 2012 by telescoper

This may be a bit premature, but it’s certainly apt as I’m just about to head off to the airport and hopefully will be airborne this evening. I expect to be online again tomorrow, after I reach my destination…

Above us, stars. Beneath us, constellations.
Five billion miles away, a galaxy dies
like a snowflake falling on water. Below us,
some farmer, feeling the chill of that distant death,
snaps on his yard light, drawing his sheds and barn
back into the little system of his care.
All night, the cities, like shimmering novas,
tug with bright streets at lonely lights like his.

by Ted Kooser (b. 1939)

 

The Name of Love

Posted in Uncategorized with tags , on April 1, 2012 by telescoper

A comment on a recent post pointed out that the ancient Greeks had four distinct name for different aspects of what in English is called, simply, “love”.

Here’s what wikipedia says on the matter:

There are several Greek words for love, as the Greek language distinguishes how the word is used. Ancient Greek has four distinct words for loveagápeérosphilía, and storgē. However, as with other languages, it has been historically difficult to separate the meanings of these words. Nonetheless, the senses in which these words were generally used are given below.

  • Agápe (ἀγάπη agápē[1]) means “love” (unconditional love) in modern day Greek, such as in the term s’agapo (Σ’αγαπώ), which means “I love you”. In Ancient Greek, it often refers to a general affection or deeper sense of “true love” rather than the attraction suggested by “eros“. Agape is used in the biblical passage known as the “love chapter”, 1 Corinthians 13, and is described there and throughout the New Testament as sacrificial love. Agape is also used in ancient texts to denote feelings for one’s children and the feelings for a spouse, and it was also used to refer to a love feast. It can also be described as the feeling of being content or holding one in high regard. Agape was appropriated by Christians for use to express the unconditional love of God.[citation needed] Before agape love there was no other word to express such great love.[citation needed]
  • Éros (ἔρως érōs[2]) is passionate love, with sensual desire and longing. The Modern Greek word “erotas” means “intimate love;” however, eros does not have to be sexual in nature.Eros can be interpreted as a love for someone whom you love more than the philia, love of friendship. It can also apply to dating relationships as well as marriage. Plato refined his own definition: Although eros is initially felt for a person, with contemplation it becomes an appreciation of the beauty within that person, or even becomes appreciation of beauty itself. Plato does not talk of physical attraction as a necessary part of love, hence the use of the word platonic to mean, “without physical attraction.” In the Symposium, the most famous ancient work on the subject, Plato has the middle-aged Athenian philosopher, Socrates argue to aristocratic intellectuals and a young male acolyte in sexual pursuit of him, that eroshelps the soul recall knowledge of beauty, and contributes to an understanding of spiritual truth, the ideal “Form” of youthful beauty that leads us humans to feel erotic desire — thus suggesting that even that sensually-based love aspires to the non-corporeal, spiritual plane of existence; that is, finding its truth, just like finding any truth, leads to transcendence. Lovers and philosophers are all inspired to seek truth through the means of eros.”
  • Philia (φιλία philía[3]) means friendship or affectionate love in modern Greek. It is a dispassionate virtuous love, a concept developed by Aristotle. It includes loyalty to friends, family, and community, and requires virtue, equality and familiarity. In ancient texts, philos denoted a general type of love, used for love between family, between friends, a desire or enjoyment of an activity, as well as between lovers.
  • Storge (στοργή storgē[4]) means “affection” in ancient and modern Greek. It is natural affection, like that felt by parents for offspring. Rarely used in ancient works, and then almost exclusively as a descriptor of relationships within the family. It is also known to express mere acceptance or putting up with situations, as in “loving” the tyrant.

I’m by no means an expert on love, but it seems to me that even with this expanded set of basis states it’s still the case that one’s emotions aren’t described fully by just one. Perhaps love is like quantum mechanics, in which the general state is a superposition?

Anyway, this all reminded me of “the love that dare not speak its name” which most take to refer to homosexual desire. In fact it’s not as simple as that. The phrase was coined by Oscar Wilde in the following excerpt taken from the transcript of his criminal trial for gross indecency in 1895:

‘The love that dare not speak its name’, in this century, is such a great affection of an elder for a younger man as there was between David and Johnathan. Such as Plato made the very basis of his philosophy, and such as you may find in the sonnets of Michelangelo or Shakespeare. It is, in this century, misunderstood. So much misunderstood that it may be described as ‘the love that dare not speak its name’, and on account of it I am placed where I am now. It is beautiful. It is fine. It is the noblest form of affection. There is nothing unnatural about it. It is intellectual. And it repeatedly exists between an elder and a younger man when the elder has intellect and the younger man has all the joy, hope and glamour of life before him. That it should be so, the world does not understand. The world mocks at it and sometimes puts someone in the pillory for it.

This looks to me like it fits in the wider definition of Eros, not necessarily of a sexual nature. It’s a very moving speech, or at least I think so,  but it didn’t do him much good. He was eventually convicted and sentenced to two years’ hard labour. And, over a century later, it’s still “misunderstood”…

 

News from the BOSS

Posted in The Universe and Stuff with tags , , , on April 1, 2012 by telescoper

No April Fool’s from me today I’m afraid!

New results from the Baryon Oscillation Spectroscopic Survey (known to its friends as BOSS) were one of the highlights of the National Astronomy Meeting last week (which I wasn’t at) and they’ve received quite a lot of press attention over the past few days. Rather than repeat what’s been said I thought I’d reblog this lengthy piece, which gives a lot of detail and is also written by an insider!

Rita's avatarwe are all in the gutter

I wrote the following post yesterday, but I fell asleep before I could do anything with it. It’s about the first set of results from the Baryon Oscillation Spectroscopic Survey (BOSS), part of Sloan Digital Sky Survey-III project, which we announced to the science community and to the press yesterday. How this whole project was picked up by the press in a way I hadn’t anticipated is the matter for another post. What really matters is the science, and the science – if you don’t mind my exceedingly biased opinion – is just excellent.

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I’m now making my way back home from this year’s National Astronomy Meeting (NAM) 2012 in Manchester. I love NAM. It’s always a chance to see old friends and listen to good science, to catch up on gossip and long-promised pints. This year, I did almost none of these things. The reason is that one…

View original post 2,265 more words

Web Life

Posted in Biographical, Books, Talks and Reviews with tags , , on March 31, 2012 by telescoper

Pure vanity drove me to post this screenshot of a nice write-up of this blog that appears in this month’s Physics World. You can read the whole edition online here if you have a subscription, but if you click on the image it’s more-or-less legible. They’ve written very nice things about In the Dark,  so hope I don’t get into trouble with their copyright enforcers by posting this…

Cement Mixer

Posted in Jazz with tags , , on March 31, 2012 by telescoper

Well, term is over and, inevitably, there are signs that the weather is on the turn. Time, I think, for a bit of inspired silliness by the great Slim Gaillard. I’ve posted about Slim before, but for completeness Slim Gaillard was a truly remarkable character who led a remarkable life, as his wikipedia page makes clear. He was a superbly talented musician in his own right, but also a wonderful comedian and storyteller. He’s most famous for the novelty jazz acts he formed with musicians such as Slam Stewart and, later, Bam Brown; their stream-of-consciousness vocals ranged far afield from the original lyrics along with wild interpolations of nonsense syllables such as MacVoutie and O-reeney; one such performance figures in the 1957 novel On the Road by Jack Kerouac.

In later life Slim Gaillard travelled a lot in Europe – he could speak 8 languages in addition to English – and spent long periods living in London. He died there, in fact, in 1991, aged 75. I saw him a few times myself when I used to go regularly to Ronnie Scott’s Club. A tall, gangly man with a straggly white beard and wonderful gleam in his eye, he cut an unmistakeable figure in the bars and streets of Soho. He rarely had to buy himself a drink as he was so well known and such an entertaining fellow that a group always formed around him, just in order to enjoy his company,  whenever he went into a pub or club. You never quite knew what he was going to do next, in fact. I once saw him sit down and play a piano with his palms facing upwards, striking the notes with the backs of his fingers as he does in this clip, wherein he interpolates an upside-down but nevertheless very accurate version of the opening passages of Debussy’s Claire de Lune.  I’m posting this primarily because it’s such a hoot, but I think it also demonstrates what a marvellous musician he was both on piano – check out the size of his hands! – and on guitar, playing a medley of his hit Cement Mixer to accompany his own gloriously daft vocal.

Other random things worth mentioning are that Slim Gaillard’s daughter was married to Marvin Gaye and it is generally accepted that the word “groovy” was coined by him (Slim). I know it’s a cliché, but he really was a larger-than-life character and a truly remarkable human being. As one of the commenters on Youtube aptly put it “To Slim Gaillard, the whole world was just one big O-roonie”. Enjoy!

End of Term

Posted in Biographical, Education with tags , , , on March 30, 2012 by telescoper

So here we are, then. The last day of term has finally arrived.  Many of our students will be out partying tonight before they start a three-week break with little to disturb their relaxation but project reports, assignments and examination revision. Probably not all that relaxing at all then, especially for the final-year students.

For various reasons I’ve found this term very heavy going and am  looking forward to spending some time away over the next couple of weeks.  More about that in due course, assuming I have internet access…

The curious thing about the academic year is that since most UK universities switched to a semester system we’ve had to cope with the fact that Easter isn’t on a fixed calendar date. Last year, Easter was rather late so we managed to squeeze in a full 11 weeks teaching in before the vacation started. This year we’ve only got time for 9 weeks, so we resume teaching in three weeks’ time for another two weeks, followed by a revision week and the examination period. I think most students probably agree with me that this hiatus is extremely annoying.

This year Good Friday is on 6th April (a week today) and Easter Monday on 9th April; both are statutory (“bank”) holidays in the UK. Most universities have felt obliged to move their recess so that these two holidays occur outside term-time.

If I had my way we would have fixed semester dates so this nonsense of a 9+2 week teaching semester wouldn’t happen. Last year’s 11-week uninterrupted run was a slog, but I much prefer it over the stop-start affair we’re having this year.

I was a visiting professor at an American university over one Easter period many years ago. Given the fact that the Christian lobby is far more powerful over there than it is here I was quite surprised by the fact that there’s no real interruption for Easter. Lectures were held on Good Friday and there’s no Easter Monday holiday. Easter Sunday was definitely observed, but that had no effect on teaching.

The two Bank Holidays are a bit of a problem, of course, especially because they are followed by two more in May. However, when I was an undergraduate at Cambridge, we had lectures as normal on bank holidays.  I’m not sure whether that practice was restricted to Oxbridge colleges – where term dates are different to elsewhere anyway – or some other Universities did the same. I don’t even know if Oxbridge still carries on over bank holidays today…

A better solution would be to distribute the statutory holidays more evenly through the year so they weren’t concentrated so inconveniently in Spring. There would be  nothing to stop Christians taking a day’s leave in order to observe Good Friday, of course.

But since only a minority of British people are practising Christians, why are the rest of us forced to arrange our calendars according to archaic and irrelevant rituals?  Far better, in my opinion,  to give us all a day off for the start of the cricket season…

Grumble over, it just remains for me to wish my loyal readers (Sid and Doris Bonkers) all the best for the recess, and I hope it’s a good night at the Student Ball tonight!