‘Stephen Hawking RIP’ by Ella Baron

Posted in Art, The Universe and Stuff with tags , , on April 5, 2018 by telescoper

I just saw this lovely illustration (by Ella Baron) and thought I would share it here.

It appears in the March 23 of the Times Literary Supplement which arrived in Maynooth while I was away and I’ve just found time to read it. I subscribe to the TLS primarily because I like the crossword..

The ‘cartoon’ is accompanied by an excerpt from A Brief History of Time:

If a pulse of light is emitted… then as time goes on it will spread out… like ripples on the surface of a pond when a stone is thrown in…

Spring comes to Maynooth

Posted in Biographical, Cardiff, Maynooth with tags , , on April 5, 2018 by telescoper

After a good night’s sleep last night I was up early this morning to give my usual Thursday 9am lecture on Computational Physics. It was a bright sunny morning, though there was overnight frost and a distinct chill in the air, as I made my way to Physics Hall. Once there, for the first time this year, I had to close the blinds because the Sun was shining too bright for the projector screen. It has hitherto always been too gloomy outside for this to happen. The picture above (of St Joseph’s Square, on the South Campus) was taken as I left St Patrick’s House after a very nice lunch of roast lamb in Pugin Hall. By this time of day it was pleasantly warm.

Here’s a nice picture of the Library circulated by the Maynooth social media folk earlier today.

library

Anyway, this mornings’s lecture was an introduction numerical solutions of ordinary differential equations, beginning with Euler’s method applied to initial value problems. Further studies of this topic – which is very important for bidding computational physics – will take up the rest of the lectures as we explore the delights of, e.g. Runge-Kutta codes and boundary value problems. This morning’s lecture was followed this afternoon by a two-hour lab session in which the students had to write their own ODE solver.

Among the advantages (for me) of teaching this module is that I’m actually becoming reasonably competent at Python. At any rate I’ve difficult improved my ability to spot bugs in codes written by other people. In fact, it is traditional for the exam in this module to include a question that involves finding 10 mistakes in a piece of Python code. That’s a fun challenge, the only real problem for me being to write a bit of code with only 10 mistakes in it in the first place…

Talking of exams, the timetables for my two current employers are now out. Computational Physics in Maynooth is on Friday 11th May while Physics of the Early Universe in Cardiff is almost a fortnight later, on Thursday 24th May. The Easter recess is shorter here in Maynooth than in Cardiff, where lectures do not resume until April 16th (assuming the UCU strike does not continue), which is why the exams in Maynooth are earlier. I’m grateful there isn’t a clash. I should have ample time to mark the Maynooth ones before the Cardiff ones are due. After the first week or so of May I won’t have to teach in both institutions, so my somewhat hectic schedule should become a little more relaxed from then onwards.

I mentioned the UCU strike above in passing. The UCU leadership has decided that there will be an online ballot on whether to accept the `offer’ recently made by the management organisation UUK. The ballot will be open until April 13th. If the vote goes against acceptance then Cardiff staff will be back on strike from 16th April, and there will be further industrial action over the examination period. I can’t predict what the result of the ballot will be. Although the UCU leadership is recommending acceptance I don’t know anyone personally who intends to vote for it, but there’s a probably a big selection effect there! There is a distinct possibility that examinations will be badly disrupted not only in Cardiff but all over the UK. It’s a very sad state of affairs but all those on strike (and the majority of students) consider the UUK side to be to blame…

EWASS in Liverpool

Posted in Football, The Universe and Stuff with tags , , , , , on April 4, 2018 by telescoper

I’m back in Maynooth with teaching to do after the Easter recess. The Flybe schedule having just changed for the summer, I took a 7am flight from Cardiff to Dublin this morning, which meant getting up at stupid o’clock, but I got here safely enough to Maynooth at about 9.40am.

Anyway, had I not known that I would be here in Ireland I would probably have planned to visit the English Midlands in order to attend EWASS (European Week of Astronomy and Space Science) which takes place this week in Liverpool. This meeting, which is in a different country each year, this time incorporates the Royal Astronomical Society’s annual National Astronomy Meeting making it one of the biggest astronomy conferences ever held in the UK.

Sadly my teaching commitments meant I couldn’t attend EWASS2018, but I thought I’d take this opportunity to wish everyone there all the best for an enjoyable and productive week.

I’ll also mention that various short videos of press briefings etc are coming out on Youtube with little snippets from the conference, including this one about Ariel (which I blogged about recently):

You can find other videos by searching for EWASS on Youtube. I’m sure more will emerge over the next couple of days!

P.S. The event in Liverpool has clearly been planned with football fans in mind: Liverpool play Manchester City tonight, in Liverpool, in the UEFA Champions League..(UPDATE: the match finished 3-0 to Liverpool, which presumably pleased the locals).

Dark Slender Boy – Liam O’Flynn

Posted in Music with tags , on April 4, 2018 by telescoper

I’m by no means an expert on the Uilleann pipes, but the sad death of Liam O’Flynn (after a long struggle with cancer) a few weeks ago gave me occasion to hear some recordings of his, and I was captivated by the amazing sounds coming from this instrument.

The Uilleann pipes look a bit like a much larger version of the Northumbrian smallpipes I am familiar with from the region of my birth, in that the bag is inflated using an elbow pump, but they have a much wider range – two octaves – and can play sharps and flats. A master such as Liam O’Flynn could also generate a range of other effects, by bending notes in much the same way as a jazz or blues musician would, and also achieving subtle changes of tone and volume. Here’s a lovely example of his art, a solo performance of a tune called Dark Slender Boy on which he conjures up a world of musical possibilities.

Burgundy Passports For Life!

Posted in Uncategorized on April 3, 2018 by telescoper

It being my first day back after the Easter break I’ve been too busy to write a proper post but I do have time to pass on a piece of important news about passports. Those of you UK citizens worried having to trade your lovely burgundy passport for a nasty blue one need fret no more.

According to the BBC news, you can carry on using your current passport until you expire:

I hope this clarifies the situation.

P. S. My own expiry date has been helpfully provided by the Irish government on my recently provided PPS card:

A Time to Resign

Posted in Biographical, Cardiff, Maynooth on April 2, 2018 by telescoper

After a weekend in which I did very little apart from sleeping, eating and doing crosswords, it was time today to get my finger out and start organising for the coming months.

Top of the agenda was writing a letter of resignation from my position at Cardiff University, which I have now done. I’ll hand it in tomorrow. I’ve already told my colleagues there that I was planning to leave this summer, but it’s now time to make it official. After my notice period expires, I will be relocating full-time to Ireland in July.

One of the complications of the resignation process is that I am obliged to use up all my annual leave entitlement before I go. I haven’t taken much this year so I have to sort out how to take it before I go while also ensuring I am still available to carry out my remaining duties and attending meetings that require my presence (eg examiners meetings). I’ll also have to sort out my pension, arrange removal of my office things to Ireland and, finally, return my keys.

When I leave it will only be two years since I went through a similar process at Sussex. I burst into tears on my last day there. I hope I don’t embarrass everyone at Cardiff in a similar way.

My contract at Cardiff was for a fixed term of three years, on a part-time basis. I’ll be leaving a year early, but I think the record will show that I’ve done virtually everything I was brought in to do. In particular the Data Innovation Research Institute has expanded dramatically over the past couple of years and looks set for a bright future, as does the School of Physics & Astronomy in which I am employed for the other half of my time.

When I returned to Cardiff two years ago I had it in my mind to retire when my contract was up but I’m now very excited about the move to Ireland, an opportunity which I hadn’t foreseen at all!

Anyway there’s lots to do in the next few weeks, including my remaining teaching duties in Cardiff and Maynooth, so I’d better get back to it!

P. S. Incidentally, I discovered that one of the readings at Stephen Hawking’s funeral was the beautiful fatalistic passage from Ecclesiastes that begins

For everything there is a season, and a time for every matter under heaven: a time to be born, and a time to die..

That may have influenced the title of this post…

Crystalline Landscape

Posted in Art with tags , , , on April 1, 2018 by telescoper

Paul Klee, Kristallinische Landschaft, 1929, watercolour on cardboard, 42cm by 33.3cm.

Why Physicists Leave Physics

Posted in Uncategorized on March 31, 2018 by telescoper

Interesting post. Only about one in twenty PhDs go on to be professors in the long run. People leave academia for various reasons, not all of them negative, but I still think we overproduce PhDs in the UK. There has never been a proper study of the merits of funding fewer PhDs and more Masters degrees, for example.

4gravitons's avatar4 gravitons

It’s an open secret that many physicists end up leaving physics. How many depends on how you count things, but for a representative number, this report has 31% of US physics PhDs in the private sector after one year. I’d expect that number to grow with time post-PhD. While some of these people might still be doing physics, in certain sub-fields that isn’t really an option: it’s not like there are companies that do R&D in particle physics, astrophysics, or string theory. Instead, these physicists get hired in data science, or quantitative finance, or machine learning. Others stay in academia, but stop doing physics: either transitioning to another field, or taking teaching-focused jobs that don’t leave time for research.

There’s a standard economic narrative for why this happens. The number of students grad schools accept and graduate is much higher than the number of professor jobs. There simply isn’t room…

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Stephen Hawking Remembered

Posted in Uncategorized on March 30, 2018 by telescoper

I wasn’t really planning to post anything over this Easter break but I thought I’d make a small exception just to direct you to a radio programme and podcast that I contributed to about Stephen Hawking, who died recently.

You can find the link to a podcast of the episode of Pythagoras’ Trousers originally broadcast on Radio Cardiff that features my ramblings, as well as a longer, unedited version of the interview I contributed, with some more technical content, here.

And let me also take the opportunity to send my best wishes to everyone of any faith or none over the forthcoming holiday!

Uncommon Travel Experiences

Posted in Biographical with tags , , on March 29, 2018 by telescoper

Back in Cardiff for the Easter weekend – which I am to spend mainly sleeping – after flying back this morning from Dublin, I thought I’d do a brief post about a fairly strange thing that happened when I got to Cardiff Airport this morning.

I’ve done this flight many times over the past few months and arrival at Cardiff has always been the same story: passengers disembark and walk through a special arrival gate marked `Channel Islands and Republic of Ireland’. This leads past a couple of desks (marked security) which have always been unoccupied and straight into the baggage reclaim area. This morning, however, there were 3-4 police and/or UKBA people and they checked everybody’s passport who was on the flight from Dublin.

This is quite irregular, as there is supposed to be a Common Travel Area including the UK and Ireland (as well as the Channel Islands and the Isle of Man), and passport checks are not routinely made at borders within the CTA. They never have been to date on any of the trips I’ve made.

So what was going on? Was it some sort of rehearsal for the post-Brexit era (which may well see the end of the CTA, as there is likely to be a hard border between the UK and Ireland)?

I suspect not. One possibility is that the Police were actually looking for someone or something specific. Although passport checks are not routinely made, there is no law forbidding them if there’s a reason to make them. In fact the CTA is the result of informal agreements rather than domestic laws or international treaties so it’s not legally enforceable in any case.

However, I think a likelier explanation is connected to the reason why the flight was late departing from Dublin. The computer system that is linked to the automatic boarding pass reader at the departure gate seemed not to be working. The Flybe staff there had to check every document by hand, and cross names off a printed list as they went through the departure gate. The final tally of passengers also took a while to produce, so we left about 25 minutes late.

I suspect that whatever the problem was with Flybe’s systems, some of the passenger data usually registered for each flight was not available. When authorities at Cardiff were informed about this, an additional precautionary check was performed. I think this is a good theory, as it provides a unified explanation of two unique phenomena (unique in my experience of the Dublin-Cardiff route, that is).

Anyway, although I was surprised at to find uniformed people checking passports when I arrived, and mildly concerned that I might miss the 10.00am bus from the airport to Cardiff, I have travelled enough to realise that it’s never a good idea to make a fuss or even a joke when immigration officers are involved; it never achieves anything and they rarely possess even the most rudimentary sense of humour. And I got on the bus with plenty of time to spare….

Incidentally, when arriving in Dublin from Cardiff there is no specific arrival area for passengers from the UK who must proceed to passport control along with everyone else. A person travelling from the UK to Ireland does not have to show a passport – an ID card will suffice – but the UK does not have a system of ID cards so the only photo-identification most of us have is a passport. In practice, therefore, I show my passport when I arrive. In fact I usually show it to the automatic barrier that reads e-passports, which is far quicker than joining the queue for those with old passports or other forms of ID. At least the automatic machines work in Dublin…