Archive for August, 2023

Times of Offers

Posted in Education, Maynooth with tags , , , , on August 31, 2023 by telescoper

It’s that time of year again when I break with the self-imposed tradition of not buying a newspaper during the week. I don’t usually buy a newspaper during the week but today is the day the full set of CAO points required for different courses across the land are published in the print edition of the Irish Times, about ten days earlier than last year. This is of course just the first round of offers so things may change over the next week or two.

Students now have to decide whether to accept their first-round offer or try to change course. Departments won’t know how many new students they have for a while yet.

The official low-tech results for Maynooth (in the lower right of the page shown above) are here. Minimum points required for Maynooth’s most important course, MH206 Theoretical Physics and Mathematics, are 494 this year, down a little from 510 last year. MH201 General Science is 350 this year compared to 400 last year; MH204 Physics with Astrophysics is 376 this year, down from 423 last year. MH101 General Arts – the most popular course at Maynooth and indeed in all Ireland – has a first round offer of 310 this year, down from 338 last year.

In fact, most courses I have looked at, not only at Maynooth, have lower first-round offers this year than last year. This is confirmed by this news item which says:

In more good news for this year’s applicants, there has been a fall in the points requirement for more than 60% of Level 8 courses.

This is interesting because it contrasts with news stories about grade inflation at the Leaving Certificate. How does one reconcile the fact that a majority of courses are asking for lower points, when the average points are going up? I think part of the answer lies in the fact that the CAO points needed for a course is largely about demand versus capacity rather than academic performance. For the last few years Maynooth University has been recruiting more and more students, putting pressure on accommodation, teaching loads and campus space. It seems likely that the desire to keep this trend going is at least part of the reason for the large falls in CAO points here. This is probably happening to some extent across the sector, though Maynooth has a more urgent need for more students – to pay for the legions of new managers it has appointed.

Another part of the answer is that one subject in which grades have fallen this year is Mathematics, specifically Higher Mathematics. Mathematics is a core subject for the Leaving Certificate and it therefore has the potential to have an effect across the board. A fall in the top grades at Higher Maths will propagate downwards through many subjects.

Three New Publications at the Open Journal of Astrophysics

Posted in OJAp Papers, Open Access, The Universe and Stuff with tags , , , , , , , on August 30, 2023 by telescoper

Not unexpectedly because of holidays, August has been rather a quiet month at the Open Journal of Astrophysics, but with people returning to work this week business has picked up again and it’s time to announce the last batch (all published this week).

In fact, this week we have published three papers, which I now present to you here. These take the count in Volume 6 (2023) up to 34 and the total published by OJAp up to 99. Who will be the author(s) of the 100th? We will just have to wait and see! I’ll do a special post for whichever paper wins that honour.

In chronological order, the three papers published this week, with their overlays, are as follows. You can click on the images of the overlays to make them larger should you wish to do so.

First one up is “Bright common envelope evolution requires jets” by Noam Soker of Technion, Haifa in Israel. This is a discussion of the role of jets that a main sequence secondary star launches as it enters a common envelope evolution (CEE) with a primary giant star. The paper was published on 28th August, is just the fifth item in the folder marked Solar and Stellar Astrophysics and can be found here.

Here is a screen grab of the overlay, which includes the abstract:

 

You can find the officially accepted version of the paper on the arXiv here.

The second paper to announce is “Almanac: MCMC-based signal extraction of power spectra and maps on the sphere” by Elena Sellentin (Leiden), Arthur Loureiro (Stockholm); Lorne Whiteway (UCL); Javier Lafaurie (Leiden); Sreekumar Balan (UCL); Malak Olamaie (York); and Andrew Jaffe & Alan Heavens (Imperial).  This presents a new software tool called Almanac , which uses Hamiltonian Monte Carlo sampling to infer the underlying all-sky noiseless maps of cosmic structures, together with their auto- and cross-power spectra.

This one is  in the folder marked Cosmology and Nongalactic Astrophysics. The paper was also published on 28th August 2023 and you can see the overlay here:

 

The accepted version of this paper can be found on the arXiv here.

The last paper of this batch paper is in the Instrumentation and Methods for Astrophysics folder. It is entitled “Neural Network Based Point Spread Function Deconvolution For Astronomical Applications” and the authors are: Hong Wang, Sreevarsha Sreejith, Yuewin, Nesar Ramachandra*, Anze Slosar & Shinjae Yoo, all of the Brookhaven National Laboratory (NY) except * who is at the Argonne National Laboratory (IL), all based in the USA. This paper discusses a neural-network based deconvolution algorithm based on Deep Wiener Deconvolution Network (DWDN) and its performance in an astronomical context.

Here is the overlay:

 

You can find the full text for this one on the arXiv here.

Bullying: How to Survive (a Guest Post by Wyn Evans)

Posted in Harassment Bullying etc with tags , , , , on August 30, 2023 by telescoper

Professor Wyn Evans is in the Institute of Astronomy at the University of Cambridge.

–0–

My article on Bullying in the UK Universities is in The Times Higher Education Supplement this week.  

https://www.timeshighereducation.com/opinion/bullying-feature-uk-research-universities-not-bug

It is a bleak assessment. If you are being bullied or harassed, either move University or get a lawyer. If you can’t afford a lawyer, join a trade union who will supply you with a lawyer.  

Whatever you do, don’t pin your hopes on your University’s shallow pretence of a grievance procedure. 

Three years ago, Unite, UNISON and UCU carried out an investigation into bullying at Cambridge University. The survey found nearly one in three had either been the victims of bullying and victimisation or had witnessed it in the previous 18 months.  

Over half thought there was no point in reporting it, as either nothing would be done or the perpetrator would retaliate. It is a grim reckoning, but all too realistic. 

Whilst preparing my article for THES, I came across an earlier, shocking article by Prof Athene Donald in The Guardian

Prof Donald describes an incident in her career when she was already a senior Professor. The title says it all: “I reported harassment and was silenced – and I’m a senior academic”. 

Though this incident occurred some time ago, nothing much seems to have changed at Cambridge University. 

If someone like Prof Athene Donald DBE, FRS and Master of Churchill cannot get the system to work, then a postdoc or a graduate student will certainly not. And a member of the professional services support staff will have zero chance. 

Prof Donald has diagnosed the problem accurately. 

“Likewise, if direction from the top suggests that the complainant is more expendable than the accused, there may be a subliminal steer towards finding in favour of the latter. It is too easy to conclude that the evidence is not strong enough to prove anything definitively, and the professor lives to bully the student another day” 

The bully is normally much more valuable to the University than the victim. 

In UK Universities, allegations are usually investigated by Human Resources departments. They are not even at arm’s length from senior management. They are readily susceptible to the “subliminal steer”.  

It may not even be subliminal. 

The default of all organisations is to protect themselves. If they are allowed to investigate wrongdoing themselves, they will seek to mitigate any negative outcome by casting the organisation in the most favourable light possible.  

It is no surprise that the Countess of Chester Hospital and the British Museum — two scandal-hit institutions in the news this week — carried out investigations that exonerated themselves. 

Bullying or harassment is thus much better dealt with by an independent body with real power — a University Ombudsman — who can genuinely assess any wrongdoing, even by senior people (they are usually the bullies).  

Celestial Echoes: The Night Sky in Irish Folklore

Posted in History, Irish Language, The Universe and Stuff with tags , , , , on August 29, 2023 by telescoper
The Milky Way over a shipwreck in Co Wexford, photographed by Adrian Hendroff, winner of this year’s Reach for the Skies photography competition.

I mentioned last week that I attended a public lecture by journalist Seán Mac an tSíthigh called Celestial Echoes: the Night Sky in Irish folklore. The talk was largely about some of the names given to celestial objects and the stories attached to those names. Much of the material was drawn from an extensive National Folklore Collection held at University College, Dublin. Unfortunately, however, the index to this collection is not very good at names for stars and constellations. In some cases it isn’t obvious what those names that are recorded actually refer to and in some cases the words themselves are obscure. The lecturer stressed that many of these words would have been known by the parents or grandparents of people in the audience, but have since been lost. There’s an article here that makes a similar point in a wider context. One prominent source of folklore, for example, is the traditional style of mackerel fishing, done at night so that the phosphorescence produced by the fish could be seen, which basically no longer exists so the folk names of stars and constellations used by the fishermen for navigation have been forgotten. Some other names have obviously been influenced by the Greco-Roman constellation names, etc.

I didn’t take many notes during this very enjoyable talk, but I did jot down a few words and phrases that I thought I’d pass on here. Given that my knowledge of modern Irish is very limited and many of the words used are dialect or archaic words that you won’t find in dictionaries, I’ll restrict myself to just a few of the things that caught my ear. Many of these are very similar in Scots Gaelic. Apologies in advance for misspellings, mistranslations or other forms of incompetence!

Before we start let me just mention that the Irish word for “star” is réalta (plural réaltai), which can also mean “a light”. There is also a diminutive, réiltín. Astronomy is réalteolaíocht and astrophysics is réaltfhisic. I’ve always liked the way astrophysics looks like “real physics”!

  • The Milky Way is usually Bealach na Bó Finne (the Way of the White/Fair Cow). The legend that goes with this name is of a cow that produces an endless supply of milk. The Milky Way can also have the more literal name Claí Mór na Réaltaí (the Great Wall of Stars); in Irish mór means “big or great” and must be cognate with the Welsh mawr. Another folk name is An Láir Bhán (the White Mare).
  • Orion is An Bodach which can mean a man, specifically an old man, or a ghost.
  • Betelgeuse is An Spor Dearg (the Red Spur); Rigel is An Spor Liath (the Grey Spur).
  • The Orion Nebula is An Sparán (the purse, pouch); cf. Scots sporran.
  • In modern Irish, the Pleaides is An Tréidín (the Little Flock or Herd) but there are a variety of other terms including Buaile an Bhodaigh (the ghost’s milking place) and Na Cearrbhaigh (the Gamblers, because they look like people playing cards..).
  • The constellation of Leo is An Corrán (the Hook, Sickle).
  • Polaris is An Réalta Thuaidh (the North Star) but also Réalta Eolais (guiding star)
  • Sirius is An Réalta Mhadra (the Dog Star).
  • Ursa Minor is An Dragbhoth (the Fiery House).
  • Ursa Major is An Mathghamhain Mór (the Great Bear); a more modern alternative word for “bear” is mathúin. The Plough is An Camchéachta
  • The Aurora Borealis can be Soilse na Speire Thuaidh (lights of the Northern sky) or na Gealáin Thuaidh or na Saighneáin.
  • A Comet is réalta (an) eireabaill, (star with a tail) réalta mhongach (long-haired or maned star) or réalta (na) scuaibe (star with a brush). There is an (extremely exaggerated) account of a comet in the famous book (and mainstay of the Irish language leaving certificate) by Peig Sayers; given the timing it may have been Halley’s Comet near its 1910 perihelion.

That’s enough for now. I have a few more, but they’ll have to wait…

An Evening of Weird Matter at MU!

Posted in Maynooth, Talks and Reviews, The Universe and Stuff with tags , on August 28, 2023 by telescoper

With just over a week to go, I thought I’d post a reminder that Maynooth University is hosting a theoretical physics meeting early next month, from September 6th to 8th; for details see here. It has been decided that there will be a couple of public evening lectures as a double-header on the first night of the conference. One of the speakers is me. Technically I’ll be on sabbatical from September 1st but I’ve delayed my travels to allow me to ive this talk. Anyway, the advert is here:

You can join us for this “evening of science celebrating the weird and wonderful ways that matter can manifest in our universe” by getting a ticket at Eventbrite below.

Tickets are free but you do need to register in advance!

Not a Bank Holiday Monday

Posted in Biographical, Maynooth on August 28, 2023 by telescoper

So here I am, back at my desk in my office at Maynooth University. Today is a Bank Holiday in parts of the United Kingdom but not here in Ireland: we had our August Bank Holiday on the first Monday of the month rather than the last. I could say that today is a normal working day, but it’s not really because it’s been a bit busier than usual. After a few days away last week, I’ve had quite a lot to catch up, including preparing two new publications at the Open Journal of Astrophysics. I also have a Euclid telecon this afternoon, though I’m not sure how many UK participants will be there given the fact that today is a public holiday.

My sabbatical officially starts on 1st September 2023 and I’m looking forward to putting my “out-of-office” message on and (selectively) ignoring emails for a year. Although a sabbatical isn’t a holiday, I plan to take Friday September 1st off after having a few drinks on Thursday evening.

Before that I have to remove the last of my personal things from this office as it will be needed for someone else. That will give me the excuse for a big clear out of things I no longer need. This process will temporarily reduce the entropy of the room, although it will increase elsewhere I will not violate the 2nd Law of Thermodynamics.

I decided some time ago that at the end of August, I would delete my account on the platform formerly known as Twitter. Those of you that want to continue following me on social media can do so via any or all of the the following:

Euclid Update

Posted in Euclid, The Universe and Stuff with tags , , , , on August 27, 2023 by telescoper

Time for a quick update on the European Space Agency’s Euclid mission. For full details about what follows you can see here. Everything I mention here is already in the public domain, so I am not disclosing any secrets!

The last update I posted mentioned that Euclid had moved into what is called the Performance Verification phase of its mission. That has now been put on hold in order to troubleshoot an intermittent problem with the Fine Guidance Sensor (FGS) which helps to maintain correct pointing of the telescope. This issue can probably be fixed by software updates, but these will have to be tested, hence the pause. This is rather irksome, but the instrument teams are confident they can find a solution soon.

Anyway, while we’re waiting, here is a video from Launch Pad Astronomy explaining about the mission. It was actually released about six days ago but I didn’t have time to post it until now. About 15 minutes long, it’s a big longer than previous official Euclid videos I’ve posted, but I think it’s very informative:

Oh, I almost forgot to mention that I’ll be talking a little bit about Euclid among other things at this event on 6th September.

The Returning and The Leaving

Posted in Biographical, Education, mathematics, Maynooth, Politics with tags , , on August 26, 2023 by telescoper

I got back to Maynooth last night after a pleasantly uneventful train journey. Just for the record both outward and return trips were perfectly on schedule. In fact it has been a very pleasant couple of days. Congratulations to the organizers for running the meeting so well and to all the speakers for delivering such an interesting programme. Next year’s INAM will be in Galway. I’m looking forward to it already!

Anyway, now I’m back I should mentioned that the 2023 Leaving Certificate results were released to students yesterday; the first round of CAO offers will go out on Wednesday 30th. Soon after that we will find out how many students we’ll have next year. Student enrolment begins on 11th September; Orientation Week for new students starts on Monday 18th September; and lectures start the following Monday (25th). I am on sabbatical for a year from next Friday (1st September) so I won’t be teaching the new students, but I know they’ll be in capable hands.

There’s a lot of discussion – much of it poorly informed – in the media about grade inflation in the Leaving Certificate (e.g. here). This happens every year (as it does with A-levels in the UK), and its very sad that people use this occasion to publicly disparage the accomplishments of students. The students can only take the examinations that are put in front of them. Any problems with the system are not their fault at all.

This year the problem stems from a decision by Minister for Education Norma Foley to impose a condition that overall grades this year would not be lower than last year. This has led to the deployment of scaling which has resulted in an uplift of around 8%. The Higher Mathematics Leaving Certificate results also benefitted from an alteration of the marking scheme because one of the papers was deemed to be too hard. Despite this, the number of students receiving the top grade of H1 fell this year from 18% to under 11%. One might argue that this disadvantages students applying to courses that actually require mathematics compared to those that don’t.

There seems to be a widespread misunderstanding that the CAO points required for a course is somehow a measure of the level of difficulty of that course. In most cases this is not the case: having a high points threshold is basically just a way of controlling the number of students allowed in. I find the connection that has been made between grade inflation and drop-out rates extremely unconvincing. High drop-out rates in recent years are probably dominated by the pandemic, housing crisis and cost of living increases, leading to many students struggling to study effectively.

During the pandemic years, grades were inflated by including coursework rather than examinations, a change enforced because of public health restrictions. The main argument for deliberate grade inflation this year was to prevent this year’s LC students being disadvantaged with respect to last year’s. It doesn’t seem to have occurred to the Government that the same argument could be used next year, and indeed forever. Fairly typically for a politician, kicking the can down the road for the next government to deal with seems to be strategy.

As a final thought, I find myself wondering what will happen to admissions at Maynooth this year. Will the decision by The Management to scrap the promised Student Centre have a big effect? And what about the further reputational harm caused by the recent furore over the Governing Authority? I suppose we’ll find out next week!

Open Access Publishing in Astrophysics

Posted in OJAp Papers, Open Access on August 25, 2023 by telescoper

I’ve got a short talk this afternoon here at INAM about Open Access Publishing in Astrophysics so I thought I’d share the slides here. Among other things, the talk contains some updates about the Open Journal of Astrophysics.

The month of August has been rather quiet in terms of publishing at the OJAp no doubt because authors and referees have been taking vacations. When I managed to reconnect to the internet last night, though, I saw that revised versions of two manuscripts have been accepted so, depending on when the final versions hit the arXiv, I expect to publish a couple of papers early next week. That will take us to 98…

Update: mine was the last talk of the meeting and I overran a bit but I think it was reasonably well received despite that. Now I’m on a train waiting to go home.

The 2023 Irish National Astronomy Meeting

Posted in Biographical, History, mathematics with tags , , , , on August 24, 2023 by telescoper

It’s been a busy day at the Irish National Astronomy Meeting, culminating with a fascinating public lecture by journalist Seán Mac an tSíthigh – bonus marks for getting the pronunciation right – and a very enjoyable shindig involving pizza and beer. There was a strong Maynooth contribution today, with excellent talks by students Noah, Saoirse, Joe & Hannah and postdocs Lewis & John. My contribution was limited to chairing a session, though I will be giving a talk tomorrow.

The only problem today was that I couldn’t get eduroam to work on the UCC campus so have only just managed to connect after getting back to my hotel, so am a bit late posting this. Anyway, here are some snaps I took on the way this morning, on the campus including a bust of George Boole.

ps. I’m sure to blog again about the public talk, but that will have to wait until I get home at the weekend.