New Publication at the Open Journal of Astrophysics!

Posted in OJAp Papers, Open Access, The Universe and Stuff with tags , , , , on June 23, 2020 by telescoper

Well, Maynooth University may well be still (partially) closed as a result of the Covid-19 pandemic but the The Open Journal of Astrophysics is definitely fully open.

In fact we have just published another paper! This one is in the Astrophysics of Galaxies section and is entitled A Bayesian Approach to the Vertical Structure of the Disk of the Milky Way. The authors are Phillip S Dobbie and Stephen J Warren of Imperial College, London.

Here is a screen grab of the overlay:

 

You can find the arXiv version of the paper here.

I’d like to take this opportunity to thank the Editorial team and various referees for their efforts in keeping the Open Journal of Astrophysics going in these difficult times.

Becoming a Culchie…

Posted in Biographical, Maynooth with tags , , on June 23, 2020 by telescoper

Among all the other things going at the moment, most of them to do with Covid-19, I am in the process of trying to buy a house. I did toy with the idea of moving to Dublin but property prices there are ridiculously high and I wanted to avoid having to commute, so I decided to stay local, not that houses are very much cheaper here in Maynooth…

Another factor has been my arthritis. It’s not at all bad at the moment, but a while ago I was viewing a property which was very nice but had very steep and narrow stairs and I suddenly struck me that in a few years’ time they would probably be quite difficult to manage. Eventually I found a lovely bungalow near Maynooth and last week had my offer on it accepted. There’s a lot that can go wrong from here but all the paperwork, survey, valuation and other stuff is proceeding and I am hoping to move into the new house towards the end of the summer. Fingers crossed. I know that a lot can go wrong in the house-buying business so I’m taking nothing for granted.

There are many similarities in the house buying saga here in Ireland compared to the United Kingdom (where I have bought and sold several properties over the years), but one big difference is the auction process. Estate agents here in Ireland are generally called auctioneers, actually. In order to register to bid you have to first show that you have the necessary funds and then you can place a bid online. It’s easy in an auction to get drawn in so far that you end up spending more than you wanted to, so I decided on an absolutely upper limit on how high I would go. Fortunately the bidding stopped well below that.

There are a few other differences between the UK and Ireland. One is that if you buy a new house here you have to pay VAT on it, which is a considerable increase in cost. Another is that stamp duty is just 1% in Ireland, whereas for a property of similar price in England it would be 5%. Other than that the business of mortgages and valuations and surveys and Land Registry is all tediously familiar.

When I told a friend what I was buying and where he described my putative new house as a “Culchie Bungalow”.
I’d heard the word Culchie before but decided to look it up. The original meaning was a person from rural Ireland, but nowadays it refers more-or-less to anybody who lives outside Dublin. I was quite surprised however to see that Maynooth is specifically mentioned as a place where culchies live on the wikipedia page

Anyway, I don’t mind being called a culchie. I’ve been called a lot worse over the years!

The World Is Waiting For The Sunrise

Posted in Jazz with tags , , on June 22, 2020 by telescoper

Today has been one of those frustrating days at work that ends with a to-do list longer than it started with so I’m in need of a pick-me-up. Here is Benny Goodman and his Sextet recorded on the Ed Sullivan show in 1960 playing The World is Waiting For the Sunrise. Goodman loved this tune and played many different versions of it over his long career. The audience definiely enjoyed this, and I think it’s BG himself who ends this one with a yeah to prove that he enjoyed it too! I hope you do likewise.

Over the years there have been some (indeed many) jazz critics who have written that Benny Goodman’s clarinet playing was `clinical’ and `unemotional’ and other such nonsense.  I think his playing on this is absolutely sensational (as incidentally is Red Norvo on the vibes).  Enjoy!

 

Scrambled Phases

Posted in Biographical, Covid-19, Maynooth with tags , , , on June 22, 2020 by telescoper

A couple of weeks ago I posted about the imminent start of Phase 2 of the Irish Government’s Roadmap for Reopening after the closures enforced because of the Covid-19 pandemic.

Since then the Irish Government has decided that there will only be four phases instead of five, and many elements of the programme will be moved forward. For example, all travel restrictions within the Republic will be lifted from next Monday (29th June), which is when Phase 3 is due to commence. It has also been announced that hairdressers, barbers, nail and brow salons, beauty salons, spas, make-up application services, tanning, tattooing and piercing services will re-open. I find that surprising, as I find it hard to see how such services can be provided at low risk of transmitting Covid-19.

In fact I find the whole idea of accelerating the Roadmap rather worrying. I hope I’m proved wrong, but it seems to me that the Government is rushing this. There are worrying signs in Germany that the R-number is increasing significantly and undue haste in opening business may lead to a similar rise. It must be stressed that the number of cases involved in Germany  is rather small and most are confined in local outbreaks that can be contained. Nevertheless, this remains a concern.

At the moment the situation looks stable, with new cases at a very low level:

I do worry however that, since only a very small fraction of the population (at most a few percent) have been infected with Covid-19, there will be very little resistance if Covid-19 starts to spread again.

As for my own work situation here at Maynooth University, what happens in Phases Three and Four is all a bit hypothetical, because we’re still stuck in Phase One! The University management is being extremely cautious about allowing anyone back to work at all until various protocols are agreed, risk assessments carried out, and staff training delivered. It seems likely therefore that we will reach Monday’s scheduled start of Phase 3 before we are even ready for Phase 2. In practice, therefore, the various phases of the Roadmap are no longer relevant in this particular setting. I think I’ll remain the only person coming in to the Department for quite some time!

I fully understand and support the careful approach adopted  by the University, of course, and the delay doesn’t matter that much as our teaching semester is now finished and, being theorists, we can all work from  home reasonably effectively. It must be more of a challenge for laboratory-based researchers. My main concern is  I’d be very surprised if all the other organizations and businesses due to open next Monday are as cautious. The last thing we need for people to cut corners and send us all back to square one.

 

Psychological Time

Posted in Biographical, Covid-19, Education with tags , , , on June 21, 2020 by telescoper

So, the Summer Solstice for 2020 is now in the past. It’s all downhill from here!

As the Solstice approached last night I was thinking back to the Vernal Equinox which had happened this year on March 20th, exactly three months before. That was at the end of Study Week in the Spring Semester but the students did not return the following week and we switched to remote teaching. I find it astonishing to think that was just three months ago. It seems like ancient history. Not only that but several major events took place during that period that I find it hard place in chronological order without looking at written records (including this blog).

I am not an expert on such matters but it seems to me that the isolation, disruption of social interaction, and the loss of familiar routines imposed by work are among the things responsible distorting perception of the passage of time. I have tried to impose a regular pattern on my day during this time but only with limited success. I suspect it’s not only me who has felt like this over the past weeks and months!

It’s not just the disruption to routine of course. There was also a genuine fear of becoming infected. My last in-person lecture was on 12th March, the Thursday before Study Week. From time to time I wondered if I would ever see those students again. I also made arrangements to write a will. For a time it looked likely that intensive care facilities in Ireland might be overwhelmed so I felt it important to make contingencies of that sort. Fortunately they weren’t needed. As far as I know the Coronavirus hasn’t reached me. I certainly haven’t had any symptoms, though I haven’t actually been tested.

Overall I found the lockdown very difficult at first but I think adjusted reasonably well despite (or perhaps because of?) having very peculiar dreams.

Now that the Covid-19 restrictions are gradually being wound down hopefully some measure of routine will resume and the sense of disorientation will fade. Time will tell.

The Summer Solstice 2020

Posted in The Universe and Stuff with tags , , , , , , on June 20, 2020 by telescoper

The Summer Solstice in the Northern hemisphere happens this evening, Saturday 20th June 2020, at 22:43 Irish Time (21.43 UTC). Among other things, this means that today is the longest day of the year. This is an earlier day in June than you might expect, primarily because 2020 is a leap year.

Days will get shorter from today until the Winter Solstice in December, although this does not mean that sunset will necessarily happen earlier tomorrow than it does today. In fact it is a little later. This is because there is a difference between mean solar time (measured by clocks) and apparent solar time (defined by the position of the Sun in the sky), so that a solar day does not always last exactly 24 hours. A description of apparent and mean time was given by Nevil Maskelyne in the Nautical Almanac for 1767:

Apparent Time is that deduced immediately from the Sun, whether from the Observation of his passing the Meridian, or from his observed Rising or Setting. This Time is different from that shewn by Clocks and Watches well regulated at Land, which is called equated or mean Time.

The discrepancy between mean time and apparent time arises because of the Earth’s axial tilt and the fact that it travels around the Sun in an elliptical orbit in which its orbital speed varies with time of year (being faster at perihelion than at aphelion).

Using a rapid calculational tool (Google), I found a table of the local mean times of sunrise and sunset for Dublin around the 2020 summer solstice. This shows that today is indeed the longest day (with a time between sunrise and sunset of 17 hours and 10 seconds), but sunset on 21st June is actually a bit later than this evening, but sunrise is also bit later so the day is indeed (slightly) shorter.

In fact if you plot the position of the Sun in the sky at a fixed time each day from a fixed location on the Earth you get a thing called an analemma, which is a sort of figure-of-eight curve whose shape depends on the observer’s latitude. Here’s a photographic version taken in Edmonton, with photographs of the Sun’s position taken from the same position at the same time on different days over the course of a year:

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The summer solstice is the uppermost point on this curve and the winter solstice is at the bottom. The north–south component of the analemma is the Sun’s declination, and the east–west component is the so-called equation of time which quantifies the difference between mean solar time and apparent solar time. This curve can be used to calculate the earliest and/or latest sunrise and/or sunset.

Challenges Past and Future

Posted in Covid-19, Education, Maynooth with tags , , , , , , on June 19, 2020 by telescoper

Yesterday afternoon we held our Departmental Examination Board in Theoretical Physics (via Microsoft Teams*) which all went remarkably well in the circumstances.

The most challenging thing to happen yesterday afternoon was that a bloke came to cut back the bushes outside my office with a very large and noisy hedge trimmer. I thought I was going to have to contend with that all afternoon but it seems he had done most of it the day before and only came back yesterday to finish off. He left before the Exam Board started.

The next stage of our Exams process is for all the Departmental results to be collated for those students on joint programmes before the final University Board takes place about ten days from now. After that students will get their results.

That doesn’t quite finish examination matters for 2019/20 however because some students will need to take repeat examinations in August. These will be a week later than usual as a knock-on effect of the extra week we were given to mark and correct the May exams. We anticipate that at least some of the repeats will be the traditional `in person’ on campus style, but some may be online timed assessments like the ones we held in May. That depends a bit on how the Covid-19 pandemic pans out in Ireland over the next few weeks (and of course how many students actually take repeats, as social distancing generates a capacity issue for the examination halls).

At the moment we are optimistic because the number of new cases of Covid-19 is low and stable. That coulld change, of course, if the virus starts to spread again so we have to have contingency plans.

Even more uncertain is what will happen in September, although I have been very annoyed by some reports in the media that seem to have been actively trying to put students off coming to University next academic year on the grounds that there won’t be any lectures. We certainly plan to offer as much face-to-face teaching as possible and I think other third-level institutions in Ireland will do likewise. There will of course have to be a backup if there is another lockdown, which may mean switching back to remote teaching at relatively short notice, but at least we’ve done that once already so know much better now what works and what doesn’t. Nevertheless I would encourage all potential students not to believe everything they read in the media nor be deterred from attending university by rumours from sources who don’t know what they are talking about.

Earlier this week I was starting to think about how we might build the required flexibility into our teaching for next year and two main things struck me.

The first is that while we have more-or-less been forced into making various kinds of video material available to students, this is something that I feel we should have been doing already. I’ve long felt that the more types of teaching we incorporate and the wider range of learning materials we provide the better the chance that students find something that works for them. Even if we do have a full programme of lectures next year, it is my intention to continue to provide, e.g., recorded video explainers as well because they might augment the battery of resources available to the student.

Some time ago I had to make some policies about `reasonable adjustments’ for some disabled students learning physics. In the course of providing extra resources for this small group I suddenly thought that it would be far better, and far more inclusive, simply to make these resources available to everyone. Likewise, we’ve been forced to adjust to providing material remotely but we should be thinking about how to keep the best things about what we’ve done over the last few months and embedding them in the curriculum for the (hopefully Coronavirus-free) future and not regard them all as temporary special measures.

The other thing that struck me is in the same vein, but a little more speculative. Over the last many years I have noticed that students use printed textbooks less and less for learning. Part of that may be because we in a digital age and they prefer to use online resources. The switch to remote learning has however revealed that there are some students who are disadvantaged by not having a good internet connection. I just wonder whether this might lead to a resurgence in the use of textbooks. I’ll certainly be making a strong recommendation to the new first-year students in Theoretical Physics that they should get hold of the recommended text, which I have previously regarded as an optional extra.

*At one point I got muddled up between Teams and Zoom and called it Tombs. It was a grave error, but it can only be a matter of time before Microsoft Tombs actually arrives…

June Thunder, by Louis Macneice

Posted in Poetry with tags , , , on June 18, 2020 by telescoper

The Junes were free and full, driving through tiny
Roads, the mudguards brushing the cowparsley,
Through fields of mustard and under boldly embattled
Mays and chestnuts

Or between beeches verdurous and voluptuous
Or where broom and gorse beflagged the chalkland–
All the flare and gusto of the unenduring
Joys of a season

Now returned but I note as more appropriate
To the maturer mood impending thunder
With an indigo sky and the garden hushed except for
The treetops moving.

Then the curtains in my room blow suddenly inward,
The shrubbery rustles, birds fly heavily homeward,
The white flowers fade to nothing on the trees and rain comes
Down like a dropscene.

Now there comes catharsis, the cleansing downpour
Breaking the blossoms of our overdated fancies
Our old sentimentality and whimsicality
Loves of the morning.

Blackness at half-past eight, the night’s precursor,
Clouds like falling masonry and lightning’s lavish
Annunciation, the sword of the mad archangel
Flashed from the scabbard.

If only you would come and dare the crystal
Rampart of the rain and the bottomless moat of thunder,
If only now you would come I should be happy
Now if now only.

by Louis Macneice (1907-1963)

 

Varun Sahni on Dark Matter & Dark Energy

Posted in The Universe and Stuff with tags , , , , on June 17, 2020 by telescoper

I’m very happy to be able to share a couple of lectures by esteemed cosmologist and erstwhile co-author Varun Sahni of the Inter University Centre for Astronomy & Astrophysics (IUCAA) in Pune, India. They’re at an introductory level appropriate for a summer school so I think quite a lot of students will find them interesting and informative!

Meanwhile, in Ireland…

Posted in Covid-19, Education, Politics with tags , , , , , , , on June 17, 2020 by telescoper

It seems an eternity since we had the 2020 general election in Ireland on February 8th because of the intervention of the Covid-19 outbreak, but it’s still been over four months. Now however it seems we might have a new government fairly soon, as a deal has been agreed to form a coalition between Fine Gael, Fianna Fáil and the Green Party; between them these parties have 84 seats (not counting the Ceann Comhairle), enough to create a majority in the Dáil Éireann. It’s not quite done and dusted, though, as the Green Party has to ballot its membership and a two-thirds majority is needed to endorse the agreement. We should know next week.

In case you think this delay means that Ireland has been in political crisis since February, it hasn’t really. The constitution makes it clear that if a new government can’t be formed the old one continues until one can (or until another election can be held). Leo Varadkar has continued as Taioseach in the mean time. His popularity has increased in this period, at least partly because as a trained medical person, he is perceived to have handled the Covid-19 crisis rather well. It seems that incumbents have generally received the backing of the public when they have coped reasonably with the pandemic. Whether that continues in Ireland remains to be seen. When the truth comes out about how many patients were transferred from hospitals into nursing homes where they were left to die perhaps opinions will change.

It has taken over four months for the the parties to agree a `draft programme for government’ which you can find here. That document is 139 pages long but largely devoid of concrete commitments and indeed devoid of anything other than vague discussions, platitudes, and `reviews’. At a quick reading I’d say the Greens have been far more effective at getting their agenda into it than Fianna Fáil, perhaps because the latter don’t really have an agenda other than wanting to be in power. The Green initiatives are in my opinion the strongest parts of the programme, but the rest seems to me to be just “more of the same”.

I’d say that the one redeeming factor is the document is the emphasis on stimulus rather than austerity as a way out of the current crisis but of course that may turn out not to be what actually happens.

From the point of view of Ireland’s universities and research community there is little to rejoice. On page 114 you can find this:

Higher and Further Education have been greatly affected by the COVID-19 crisis and we will support the sector through these challenges to ensure that educational opportunities remain and are made more accessible to everyone, particularly the most vulnerable in our society. In addition, we will continue to support our research community to tackle the social and scientific problems posed by COVID-19 now and into the future.

We are committed to addressing the funding challenges in third-level education. We want a Higher and Further Education sector that sees education as a holistic and life-long pursuit. We will continue to build strong connections with other education sectors and wider society, while recognising our global and environmental responsibilities. It is vital we invest in our Higher and Further Education sectors so we can continue to tackle inequality based on race, gender, and socio-economic background. We recognise the potential for our Higher and Further Education institutions to be exemplars regionally, nationally and internationally.

At a time of great economic uncertainty, when so many people fear for their future employment, we will ensure that Higher Education plays a vital role in our recovery. We will equip students with the skills necessary to secure employment, while preparing for the opportunities and challenges posed by a changing economy, the move to a low-carbon future and disruptive technologies, as well as offering retraining and reskilling opportunities to help people into employment.

Warm words at the start and then a worryingly blinkered emphasis on universities simply as providers of skills training. We do that of course, but we do so much more that Irish governments seem not to recognize.

Later on we get a commitment to

Develop a long-term sustainable funding model for Higher Level education in collaboration with the sector and informed by recent and ongoing research and analysis.

Sigh. There’s been an OECD Report (2004), the Hunt Report (2011), the Cassells Report (2016), etc. How many times will this issue be kicked into the long grass?

The Fianna Fáil `pledge’ to introduce a Minister for Higher Education and Research has, needless to say, fallen by the wayside in the negotiations.

The plan for the new Government is that the plan is as the leader of the largest party in the coalition, Fianna Fáil, Micheál Martin will take over as Taoiseach for two years, after which Leo Varadkar will return. This is being referred to as a `Rotating Taoiseach’, which is a pretty apt given that the programme has more spin than substance.