A Day in Cardiff

Posted in Art, Biographical, Cardiff, LGBTQ+, Opera, Politics with tags , , , , , on April 5, 2025 by telescoper

I got up at Stupid O’Clock this morning to catch an early morning plane from Dublin to Cardiff. It was very cold when I  arrived but it soon warmed up and turned into a lovely day.

I had a nice breakfast at Bill’s when I arrived in the City then did tour of the National Museum of Wales where there is an exhibition about the Miners’ Strike of 1984/5, from which this display case caught my attention:

I also had time for a round of Name That Artist (scoring a miserable 3/12, for Sutherland, Ernst, and Magritte).

After that, I took a stroll around Bute Park before heading to my hotel in Cardiff Bay to check in and have a rest before the reason for my visit, an event which will take place here at 7pm:

I won’t be able to blog about that until I get back to Maynooth tomorrow afternoon.

Weekly Update from the Open Journal of Astrophysics – 05/04/2025

Posted in OJAp Papers, Open Access, The Universe and Stuff with tags , , , , , on April 5, 2025 by telescoper

It’s time once more for the regular Saturday morning update of papers published at the Open Journal of Astrophysics. Since the last update we have published one new paper. The number of articles in Volume 8 (2025) is now up to 33 and the total so far published by OJAp up to 268.

The paper concerned, published on 2nd April 2025, is “The molecular gas content throughout the low-z merger sequence” by Mark T. Sargent (ISSI, Bern), S. L. Ellison (U. Victoria, Canada), J. T. Mendel (ANU), A. Saintonge (UCL), D. Cs. Molnár & T. Schwandt (U. Sussex), J. M. Scudder (Oberlin College, USA) and G. Violino (U. Hertfordshire). It is published in the folder Astrophysics of Galaxies and it discusses the observed properties of molecular gas in post-merger galaxies and interacting pairs and the physical origin of these properties.

Here is the overlay:

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

That’s all for this week. I’ll do another update next Saturday.

The Market-Place – Walter de la Mare

Posted in Poetry with tags , , , on April 4, 2025 by telescoper
My mind is like a clamorous market-place.
All day in wind, rain, sun, its babel wells;
Voice answering to voice in tumult swells.
Chaffering and laughing, pushing for a place,
My thoughts haste on, gay, strange, poor, simple, base;
This one buys dust, and that a bauble sells:
But none to any scrutiny hints or tells
The haunting secrets hidden in each sad face.

The clamour quietens when the dark draws near;
Strange looms the earth in twilight of the West,
Lonely with one sweet star serene and clear,
Dwelling, when all this place is hushed to rest,
On vacant stall, gold, refuse, worst and best,
Abandoned utterly in haste and fear.

by Walter de la Mare (1873-1956)

Trump’s Tariff Tirade

Posted in Finance, mathematics, Politics with tags , , , , , , on April 3, 2025 by telescoper

I didn’t watch the speech tirade by “US President” Donald Trump* last night in which he unveiled his new tariff plan, but people have been talking about this all day so I couldn’t resist a quick comment. There’s a lot I don’t know about economics and trade policy but one thing I do know is that the trad-weighted average tariff on goods from the USA entering the EU is about 3%, not the 39% that Trump alleged. I did therefore wonder where he got this number and all his other “reciprocal tariffs” from. Fortunately a little digging around revealed the answer.

On the left you see part of the chart showing tariffs country-by-country and the second is an extract from the published methodology which would be hilarious were the consequences not so serious.

You will see that the second column on the chart is headed “Tariffs charged on the USA”, with 39% listed for the European Union. This number is calculated using the “formula” on the right which has absolutely nothing to do with tariffs charged. Moreover, the denominator contains the product εφ with the values ε=4 and φ=0.25 given in the text so εφ = 1. The expert mathematician who derived this formulae seems to have missed the fact that ε is not less than zero (first sentence) if it is equal to 4, but we’ll let that pass. In fact I can’t be bothered to point out the other errors because no matter how egregious they are, there is no chance of Trumpty Dumpty reversing his decisions anyway.

To sum up, the notional tariff in column 2 is just the difference between imports and exports (the country’s trade surplus) divided by imports. The numbers in the third column of the chart on the left are just half those in the second column (give or take rounding errors). There is also a minimum of 10%, which applies even to countries with which the USA has a trade surplus. China faces huge tariffs because it has a large trade surplus with the USA. The EU’s 20% tariff is nothing to do with the tariffs it charges but is due to the fact that it has a trade surplus with the USA; the UK has a lower tariff rate than the EU because it has a smaller trade surplus  with the USA. That’s it.

I heard a Trump-supporting numpty attempting to justify the calculation shown in the chart on the grounds that it is really an “unfairness index”, it apparently being unfair and worthy of punishment if a country sells more to the USA than the USA sells to it. Following this line of reasoning, I have decided that all shops are unfair because I always buy more from them than they buy from me.

P.S. I was thinking that in future retaliation I should boycott goods from the USA but this would be an empty gesture because I don’t really buy any anyway. Looking up top imports from the USA to Ireland I find, for example, Bourbon (which I never buy because it is undrinkable) and confectionery (which I don’t buy because I don’t have a sweet tooth). Then I found peanuts, which I do buy occasionally, and will not buy in future. However in the grand scheme of world trade, peanuts are small potatoes.

*I apologize for forgetting to mention that Donald Trump is a convicted felon.

Maynooth University Library Cat Update

Posted in Maynooth with tags , on April 2, 2025 by telescoper
Cat and shadow…

I’ve never thought before that a cat could be used as a sundial…

The Universe from Beginning to End

Posted in Maynooth, The Universe and Stuff with tags , , , on April 2, 2025 by telescoper

It’s not every day that you get the chance to attend a lecture by a Nobel Laureate, but 14th April 2025 will be such a day in Maynooth because the annual Dean’s Lecture for the Faculty of Science and Engineering at Maynooth University will be given by Professor Brian Schmidt who was one of the three winners of the 2011 Nobel Prize for Physics.

The description of his lecture is as follows:

Astronomers have pieced together the story of our Universe that begins more than 13 Billion years ago in a Big Bang. In the 2025 Dean’s Lecture, Nobel Prize Winner Prof Brian Schmidt will describe the journey that science has thus far taken to understand our Universe, describing what we know about the Cosmos and how we know it, as well as reflecting on some of the mysteries that remain. A chance to learn a bit about everything from Dark Energy to Black Holes, and an opportunity for the audience to ask questions at the end of the lecture.

The lecture is intended to be accessible to a wide audience and will be in person. It is free to attend but you need to register because space in the lecture venue is limited. To register and also find out more about the event please visit Eventbrite below:

I am delighted that Brian is taking time out of his busy schedule to visit us in Maynooth and am looking forward not only to his lecture but also for the chance for him to meet and talk to our students.

ResearchFish Again

Posted in Biographical, Science Politics with tags , , , , , , on April 1, 2025 by telescoper

One of the things I definitely don’t miss about working in the UK university system is the dreaded Researchfish. If you’ve never heard of this bit of software, it’s intended to collect data relating to the outputs of research grants funded by the various Research Councils. That’s not an unreasonable thing to want to do, of course, but the interface is – or at least was when I last used it several years ago – extremely clunky and user-unfriendly. That meant that, once a year, along with other academics with research grants (in my case from STFC) I had to waste hours uploading bibliometric and other data by hand. A sensible system would have harvested this automatically as it is mostly available online at various locations or allowed users simply to upload their own publication list as a file; most of us keep an up-to-date list of publications for various reasons (including vanity!) anyway. Institutions also keep track of all this stuff independently. All this duplication seemed utterly pointless.

I always wondered what happened to the information I uploaded every year, which seemed to disappear without trace into the bowels of RCUK. I assume it was used for something, but mere researchers were never told to what purpose. I guess it was used to assess the performance of researchers in some way.

When I left the UK in 2018 to work full-time in Ireland, I took great pleasure in ignoring the multiple emails demanding that I do yet another Researchfish upload. The automated reminders turned into individual emails threatening that I would never again be eligible for funding if I didn’t do it, to which I eventually replied that I wouldn’t be applying for UK research grants anymore anyway. So there. Eventually the emails stopped.

Then, about three years ago, ResearchFish went from being merely pointless to downright sinister as a scandal erupted about the company that operates it (called Infotech), involving the abuse of data and the bullying of academics. I wrote about this here. It then transpired that UKRI, the umbrella organization governing the UK’s research council had been actively conniving with Infotech to target critics. An inquiry was promised but I don’t know what became of that.

Anyway, all that was a while ago and I neither longer live nor work in the UK so why mention ResearchFish again, now?

The reason is something that shocked me when I found out about it a few days ago. Researchfish is now operated by commercial publishing house Elsevier.

Words fail. I can’t be the only person to see a gigantic conflict of interest. How can a government agency allow the assessment of its research outputs to be outsourced to a company that profits hugely by the publication of those outputs? There’s a phrase in British English which I think is in fairly common usage: marking your own homework. This relates to individuals or organizations who have been given the responsibility for regulating their own products. Is very apt here.

The acquisition of Researchfish isn’t the only example of Elsevier getting its talons stuck into academia life. Elsevier also “runs” the bibliometric service Scopus which it markets as a sort of quality indicator for academic articles. I put “runs” in inverted commas because Scopus is hopelessly inaccurate and unreliable. I can certainly speak from experience on that. Nevertheless, Elsevier has managed to dupe research managers – clearly not the brightest people in the world – into thinking that Scopus is a quality product. I suppose the more you pay for something the less inclined you are to doubt its worth, because if you do find you have paid worthless junk you look like an idiot.

A few days ago I posted a piece that include this excerpt from an article in Wired:

Every industry has certain problems universally acknowledged as broken: insurance in health care, licensing in music, standardized testing in education, tipping in the restaurant business. In academia, it’s publishing. Academic publishing is dominated by for-profit giants like Elsevier and Springer. Calling their practice a form of thuggery isn’t so much an insult as an economic observation. 

With the steady encroachment of the likes of Elsevier into research assessment, it is clear that as well as raking in huge profits, the thugs are now also assuming the role of the police. The academic publishing industry is a monstrous juggernaut that is doing untold damage to research and is set to do more. It has to stop.

Last Chance to apply for the Professorial Position in Observational Astrophysics or Cosmology at Maynooth University!

Posted in Maynooth, The Universe and Stuff with tags , , , , on March 31, 2025 by telescoper

A couple of months ago I announced here a vacancy for a Professor of Observational Astrophysics or Cosmology at Maynooth. The position is on the AAS Jobs Register here. The deadline is 31st March 2025 which is today so if you were thinking of applying then this is your last chance! Applications close at 23.30 Irish Time; the clocks went forward yesterday so it’s actually 00.30 tomorrow CEST so you still have time. The application portal is here.

The strategic case for this Chair revolves around broader developments in the area of astrophysics and cosmology at Maynooth. Currently there are two groups active in research in these areas, one in the former Department of Experimental Physics (which is largely focussed on astronomical instrumentation) and the other, in the former Department of Theoretical Physics, which is theoretical and computational. We want to promote closer collaboration between these research strands. The idea with the new position is that the holder will nucleate and lead a research programme in the area between these existing groups as well as getting involved in outreach and public engagement.

It is intended that the position to appeal not only to people undertaking observational programmes using ground-based facilities (e.g. those provided by ESO, which Ireland recently joined), or those exploiting data from space-based experiments, such as Euclid, as well as people working on multi-messenger astrophysics, gravitational waves, and so on.

P. S. For those of you reading this from outside Ireland the job is tenured and includes a defined benefit pension way better than the equivalent UK system.

The KiDS Legacy

Posted in The Universe and Stuff with tags , , , , , , , , on March 30, 2025 by telescoper

What with all the cosmological goings-on of the past couple of weeks – see here, here and here – I quite forgot to mention another important set of results. These are from the final data release Kilo-Degree Survey known as KiDS for short and represent a final analysis of the complete dataset. For those of you not in the know, KiDs is a weak lensing shear tomography survey and its core science drivers are to map the large scale matter distribution in the Universe and constrain the equation of state of Dark Energy. The results can be found in three papers on arXiv, which you can add to your reading list:

As far as I’m concerned, the main result to leap out from the cosmological analysis, which primarily constrains the clumpiness of matter in the universe, expressed by the density parameter Ωm and a fluctuation amplitude σ8 in the combined parameter “S8“, which is constrained almost independently from Ωm. The value obtained for this parameter by KiDS has previously been “in tension” with values from other experiments (notably Planck) ; see here for a discussion. The new results, however, seem consistent with the standard cosmological model. Here is a figure from the last paper in the above list that illustrates the point:

As is often the case, there’s also one of those nice Cosmology Talks videos that discusses this and other aspects of the KiDS Legacy results to which I refer you for more details!

Weekly update from the Open Journal of Astrophysics – 29/03/25

Posted in OJAp Papers, Open Access, The Universe and Stuff with tags , , , , , , , , , , , on March 29, 2025 by telescoper

It’s time once more for the regular Saturday morning update of papers published at the Open Journal of Astrophysics. Since the last update we have published three new papers which brings the number in Volume 8 (2025) up to 32 and the total so far published by OJAp up to 267.

We’re almost at the end of March so I checked the records. In the first three months of last year we published 22 papers, compared to the 32 so far this year.

We were affected by a few gremlins in the works at Crossref this week which delayed some submissions. Since our DOIs are generated and registered with Crossref at the time of publication this delayed some papers a little.  I think these problems are ongoing but I know that the team at Crossref are working on them so expect will be fixed soon.

Anyway, in chronological order of publication, 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.

The first paper to report is “Gravitational Lensing of Galaxy Clustering” by Brandon Buncher & Gilbert Holder (University of Illinois Urbana Champaign) and Selim Hotinli (Perimeter Institute, Canada). This paper is in the folder marked Cosmology and NonGalactic Astrophysics and it was published on Thursday 27th March 2025. it presents a study of the cross-correlations between lensing reconstruction using galaxies as sources with cosmic shear measurements.

Here is the overlay:

 

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

The second paper of the week is “Reformulating polarized radiative transfer for astrophysical applications. (I) A formalism allowing non-local Magnus solutions” by Edgar S. Carlin (Instituto de Astrofísica de Canarias), Sergio Blanes (Universitat Politcècnica de Valencia) & Fernando Casas (Universitat Jaume I), all in Spain.

It appears in the folder Solar and Stellar Astrophysics. It presents a new family of numerical radiative transfer methods and their potential applications such as accelerating calculations involving Non-Local Thermodynamic Equilibrium. This paper was published on Friday 28th March 2025.

Here is the overlay:

 

 

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

The final paper, also published on Friday 28th March, is in the folder
Cosmology and NonGalactic Astrophysics. The title is “CosmICweb: Cosmological Initial Conditions for Zoom-in Simulations in the Cloud” and the authors are Michael Buehlmann (Argonne National Laboratory), Lukas Winkler (U. Wien), Oliver Hahn (U. Wien), John C. Helly (ICC Durham) and Adrian Jenkins (ICC Durham).

This paper describes a new database and web interface to store, analyze, and disseminate initial conditions for zoom simulations of objects forming in cosmological simulations. The database can be accessed directly here.

Here is the overlay:

 

 

The official published version can be found on the arXiv here.

That’s all for this week. I’ll do another update next Saturday.