Archive for May, 2020

Watch “Why the Universe is quite disappointing, really – Episode 3” on YouTube

Posted in The Universe and Stuff, YouTube on May 12, 2020 by telescoper

Why the Universe is quite disappointing really – Episode 3, in which I give two examples of biological systems that are inefficient and poorly designed. If these are the product of intelligent design, the designer clearly wasn’t concentrating.

Remembering Johnny Hodges – Jeep’s Blues (Live at Newport, 1956)

Posted in Jazz with tags , , , , on May 11, 2020 by telescoper

The great alto saxophonist and long-term mainstay of the Duke Ellington Orchestra Johnny Hodges passed away 50 years ago today, on 11th May 1970.

Here’s the piece that was his signature tune, Jeep’s Blues – played during a very famous live concert by the Ellington band at the Newport Jazz Festival in 1956.

Feast your ears on that huge soulful sound that was perfect for playing the blues!

Calculating the UK COVID Alert Level

Posted in Covid-19, mathematics, Politics with tags , , , on May 11, 2020 by telescoper

I didn’t watch yesterday’s broadcast by the UK’s Clown-in-Chief Bozo Johnson but I gather that he delivered an address that was every bit as coherent and lucid as one might have expected.

I for one am delighted that at last there is some clarity in the UK Government’s position and that they have applied the necessary level of mathematical rigour to their treatment of the Covid-19 Pandemic.

Catching up on these pronouncements via Twitter I was impressed to see, for example, to see this precise formulation of the calculation required to establish the COVID Alert Level.

Let me take you through a detailed calculation using this important formula.

As far as I know the best estimate of the basic reproduction number R in the UK is around 0.8.

As of this morning (11th May) the number of confirmed Covid-19 infections in the UK is 219,183.

Applying the formula I obtain a value

COVID Alert Level = 219183.8

That seems a big number. I thought it should only go up to 11. Have I slipped up somewhere?

Azed 2500

Posted in Biographical, Crosswords on May 10, 2020 by telescoper

Long before this Covid-19 lockdown started I had been planning to attend a lunch, due to take place last weekend, on Saturday 2nd May, at Wadham College Oxford, in honour of Jonathan Crowther who, under the pseudonym Azed, has been setting cryptic crosswords in the Observer for the best part of 50 years. The occasion for this planned shindig was the publication of the 2500th Azed Crossword. I went to a similar celebration about a decade ago when the 2000th Azed puzzle came out and enjoyed it a lot.

Sadly, but of course understandably, the Azed 2500 lunch was cancelled (or at least postponed until September) but the crossword appeared today (above). It looks a bit tricky, but it will have to wait until later because I have many other things to do.

I haven’t been doing crosswords as regularly as usual during this period. The main reason for that is lack of time and energy caused by my current workload, but it’s also the case that most newspapers are no longer running their competitions: without the possibility of a prize I don’t feel do enthusiastic about solving the puzzles. The Azed Competition is still running, though, so I’ll definitely give this one a go.

Anyway let me take this opportunity to thank Azed for all the challenging yet enjoyable crosswords he has set over the years!

Update: I managed to solve the puzzle, which was indeed tricky: it took me a good couple of hours! Now to compose a clue for 34 across!

Leaving Off

Posted in Education, Maynooth with tags , , , on May 9, 2020 by telescoper

So yesterday the Government of Ireland announced that this year’s Leaving Certificate examinations will be cancelled. That decision seems to have surprised quite a few people but to me it looked inevitable once the Covid-19 Roadmap was published last Friday. If you recall these examinations would normally take place in June but this year had been initially been postponed to happen in late July and into August. Now they’re cancelled altogether.

Not many details are available about the scheme proposed to replace the examinations but it will be based on an assessment made by schoolteachers based on previous performance moderated in some way by the Department for Education & Skills, which has oversight of the process.

Most of the reaction I’ve seen on social media from students is that they’re delighted they won’t have to sit the examinations. Questions arise however about how fair the new system will be, especially given that it is being assembled at such short notice.

I note that the Government press release states that

Students will also retain the right to the sit the 2020 Leaving Certificate examinations at a date in the future when it is deemed safe for state examinations to be held.

The Leaving Certificate isn’t just about entry into Third Level Education but it does raise specific issues for that sector. One is how many students who would potentially enter Higher Education in September will defer until they can take the Leaving Certificate proper. If many do that then the implications for University finances in the short term are significant.

Another issue is that Universities have been planning on the basis that because of the delayed Leaving Certificate, newly enrolled students would not be arriving until November. Now it looks like they will come in September along with the returning students, so we now need a Plan B.

On the face of it, it seems good news that we will no longer have the staggered academic year required in Plan B to contend with. On the other hand, if institutions have to operate with strict social distancing measures in place when they reopen, as is likely, the increased number of students in September will make this even more difficult – especially since first-year classes are the usually larger ones. I can’t see any way of coping unless a significant part of our teaching is done remotely. Recorded lectures and virtual tutorials look set to be part of the “new normal” for some time.

The decision to cancel the Leaving Certificate raises other questions but I don’t want to get into a discussion of the rights and wrongs of that decision (in which it seems Ireland’s universities had very little influence) . All I will say – and I’m sure that I speak for all my colleagues at Maynooth University – is that we will do our utmost to operate the new admissions system in a way that is as fair as possible to potential students, and to deliver the best education we can with the resources available within whatever constraints we are under in September. Whatever we do won’t be perfect, but we’ll do our best.

Until then there is no need for students or staff to get even more stressed than we are already, so I hereby invoke the calming influence of Maynooth University Library Cat.

Watch “Why the Universe is quite disappointing really – Episode 2” on YouTube

Posted in The Universe and Stuff, YouTube with tags , , on May 8, 2020 by telescoper

Episode 2, in which I explain how stars limp along unimpressively, making very poor use of the resources available to them, not doing a very good job at what they’re supposed to be doing, and then they die.

Just like people really…

Gruber Prize 2020: Volker Springel & Lars Hernquist

Posted in Open Access, The Universe and Stuff with tags , , , , , on May 8, 2020 by telescoper

I’m delighted to be able to pass on the news released yesterday that the 2020 Gruber Prize for Cosmology has been awarded to Lars Hernquist (left) and Volker Springel (right) for their work on numerical simulations.

The citation reads:

The Gruber Foundation is pleased to present the 2020 Cosmology Prize to Lars Hernquist and Volker Springel for their transformative work on structure formation in the universe, and development of numerical algorithms and community codes further used by many other researchers to significantly advance the field. The contributions of Hernquist and Springel have led to profound insights spanning billions of years of cosmic evolution, including simulations of the growth of early density fluctuations through to present-day galaxies, the influence of galaxy mergers on star formation, and the close coevolution of supermassive black holes with their host galaxies.

I’ll just add that as well as being enormously influential in purely scientific terms both these scientists have contributed to the culture of open science through making codes (such as GADGET) freely available to the community.

Heartiest congratulations to Volker Springel and Lars Hernquist on their very well deserved award.

Bright Mississippi – Allen Toussaint

Posted in Jazz with tags , , , on May 7, 2020 by telescoper

I have, on a few occasions posted pieces of Jazz that cross over different eras and here’s a wonderful example that has been in my head for a while. Bright Mississippi is a typically quirky composition by Thelonious Monk, a man often described as the ‘High Priest of Bop’. This version in a live performance by a band led in 2009 by Allen Toussaint, however, gives it a joyously carefree New Orleans treatment.

Tsundoku

Posted in Biographical with tags on May 7, 2020 by telescoper

I’m a bit late having my lunch break today because I’ve had so many things to do. That also means I don’t have much time to post much.

I was staring vacantly around my sitting room after eating my sandwich when I noticed this pile of (six) books.

I remember putting those books there a few weeks ago when there there was a little game going around on Twitter based on the Japanese word Tsundoku (積ん読) which means the practice of acquiring reading materials but letting them pile up in one’s home without reading them. I do that a lot, so I’m quite pleased there’s a word for it. The term originated in the Meiji era (1868–1912) as Japanese slang.

The Twitter game involved showing a stack of six books acquired but unread and inviting six others to do likewise. Most of my books are currently unreachable, either in my office in Maynooth University or in storage back in Cardiff, but most of those I do have in my flat in Maynooth are unread because those are the only ones I brought here. This has made it difficult to display an array of books behind myself during Zoom meetings and the like.

I’m not sure I’ll get around to reading any of them any time soon. One of the reasons for that (besides lack of time) is that I really need to get new specs as my eyesight is deteriorating and quite a few of these books have rather small print. I wonder when I’ll be able to have an eye test?

Watch “Why the Universe is quite disappointing really – Episode 1” on YouTube

Posted in The Universe and Stuff, YouTube on May 6, 2020 by telescoper

Episode 1, in which I explain why stars are not very good at generating power and that a couch potato radiates more energy per kilogram than the Sun.

https://t.co/elGMl468hq