Archive for November, 2021

The Curious Incident of the JWST and the Clamp Band…

Posted in The Universe and Stuff with tags , , , on November 23, 2021 by telescoper

 

Just a quick newsflash to pass on the news that the launch of the James Webb Space Telescope has been pushed back until at least 22nd December 2021 owing to an “incident” that occurred during preparations for its launch.

It seems the sudden release of a “clamp band” – or is it band clamp? – caused unwanted vibrations through the observatory and it now has to be thoroughly checked before it can be declared safe for launch.

This is not the news anyone wanted to hear, but the previous launch date was 18th December, so hopefully the few days’ delay won’t cause too much difficulty.

I was going say that for JWST to work there has to be something incident on its mirror, but on reflection I decided that wasn’t a very good joke.

 

 

Colder Times

Posted in Biographical, Maynooth with tags , , , on November 22, 2021 by telescoper

All of a sudden winter is here. Until now the temperature has stayed in double figures but it was much colder yesterday and this morning we had a hard frost. It has barely been above freezing at any point today. It was -2 °C at 7.30pm when I got home from work.

I now wish I’d bought some food for the birds at the weekend as the feeders are empty and I think my little avian visitors need some fuel. At least there are lots of berries around. A wood pigeon visits my garden regularly to feast on them and as a result is now as round as a football and probably too fat to fly.

On the subject of birds, this little chap appeared outside my office window last week. The distinctive red colour on the body doesn’t show up at all in the phone picture but, when combined with the black cap on its head, made me think it was a bullfinch. Bullfinches spend the winter here so maybe I’ll see this one again.

I suddenly thought today that it might be an idea to put some bird feeders in the space outside my office window. It’s enclosed by walls on all sides but open above. It would be a very safe space for birds to feed and it would be nice to encourage a few more avian visitors.

At Day-Close in November by Thomas Hardy

Posted in Poetry with tags , , on November 21, 2021 by telescoper

The ten hours’ light is abating,
And a late bird wings across,
Where the pines, like waltzers waiting,
Give their black heads a toss.

Beech leaves, that yellow the noon-time,
Float past like specks in the eye;
I set every tree in my June time,
And now they obscure the sky.

And the children who ramble through here
Conceive that there never has been
A time when no tall trees grew here,
That none will in time be seen.

by Thomas Hardy (1840-1928)

Questions of Examinations and Lectures

Posted in Covid-19, Education, Maynooth with tags , , , , on November 20, 2021 by telescoper

The deterioration of the Covid-19 situation in Ireland continues apace, with a 7-day average of new cases currently around 4300 per day and 640 people in hospital with 121 needing intensive care.

No doubt due to vaccination the number of deaths remains mercifully low, just 43 reported last week. Let’s hope that lasts.

We have four more weeks of teaching at Maynooth University this semester after which we have the Christmas break and then, in January, the examination period. The current plan is for the examinations to be of the traditional kind, taken in an exam hall on campus but how long this will indeed be the plan is anyone’s guess.

Here at Maynooth we have been told here that a decision will be taken next Friday (26th November) on whether on-campus examinations will go ahead after Christmas. With just three weeks of the term left at that point, this seems very late. If the decision is taken next week to go ahead and the pandemic continues to deteriorate (which is likely, with a surge in transmission expected over the holiday) then that decision may have to be reversed in January.

The Minister responsible for Higher Education, Simon Harris, has indicated that third-level institutions may have to introduce special mechanisms to help students prevented from attending exams in person by Covid-19.

I really hope this is not going to be interpreted as meaning that we have to offer both online and on campus examinations.

That’s partly because of the workload issue: we’ve already written our examinations on the basis that they will be held in person and would have to write another set and get them ready with just three weeks of the term left. We’ve been landed with heavy increases in workload at short notice before I don’t think I’m the only person to be a bit fed with it. Another issue, is that is fairness. I think it is important that all students should take the same examination in the same way otherwise one group might be disadvantaged relative to the other. It would be fairer simply to allow students who can’t take the on-campus examinations in January to take the August repeat in the usual manner.

It’s not for me to decide, of course, but I think it would be sensible to take the decision immediately to switch to online examinations in January. That way staff and students will know straight away where they stand. If it turns out the pandemic does go as badly over the next two months then this might seem to have been excessively cautious, but what would really be lost? We have done three examination periods online now during the pandemic and I think that by now we know how to do it reasonably well.

Examinations are still some time in the future of course, but we still have four weeks of teaching to get through. I have seen anecdotal evidence from colleagues that attendance at lectures and tutorials has fallen rapidly since the mid-term break. I have heard directly from some students that they do not feel safe travelling to and from University and are wary of the large crowds on campus.

My own experience is that lecture attendance has held up reasonably well in my modules, but I deliver my lectures as webcasts and record them anyway so am quite happy if students want to watch them remotely or offline at a subsequent date. Many of them are taking other subjects which are taught in bigger classes which are all online anyway and in that case there is little incentive to come onto campus for one module when everything else is remote.

Simon Harris seems to have nailed his colours to the “return-to-campus” mast so even if there is a drastic surge in Covid-19 over the next few weeks I think the official line will be that we carry on teaching in person. Students however are probably more sensible that either politicians or University managers and will revert to online learning for all practical purposes by simply not coming to campus. And who could blame them?

The Hardest Problem

Posted in Cute Problems, Education, mathematics with tags , , , on November 19, 2021 by telescoper

The following Question, 16(b), is deemed to have been the hardest problem on the Maths Extension 2 paper of this year’s HSC (Higher School Certificate), which I think is the Australian Equivalent of the Leaving Certificate. You might find a question like this in the Applied Mathematics paper in the Leaving Certificate actually. Since it covers topics I’ve been teaching here in Maynooth for first-year students I thought I’d share it here.

I don’t think it’s all that hard really, probably because it’s really a physics problem (which I am supposed to know how to solve), but it does cover topics that tend to be treated separately in school maths (vectors and mechanics) which may be the reason it was found to be difficult.

Anyway, answers through the comments box please. Your time starts now.

On the Repeal of Section 28..

Posted in History, LGBTQ+, Politics with tags , , , on November 18, 2021 by telescoper

I was reminded today is the 18th anniversary of the Repeal in England & Wales (on 18th November 2003) of Section 28 of the Local Government Act 1988, which contained the following:

I remember very well the numerous demonstrations and other protests I went on as part of the campaign against the clause that became Section 28 way back in 1988. Indeed, these were the first large political demonstrations in which I ever took part. But that repugnant and obviously discriminatory piece of legislation passed into law anyway. Students and younger colleagues  probably don’t have any idea how much pain and anger the introduction of this piece of legislation caused at the time, but at least it also had the effect of galvanising  many groups and individuals into action. The fightback eventually succeeded; Section 28 was repealed in Scotland in 2000 and in England & Wales in 2003.

I know the 33 years that have elapsed since the introduction of Section 28  is a long time, but it’s still amazing to me that attitudes have changed so much that now we have same-sex marriage. I would never have predicted that if someone had asked me thirty years ago!

I think there’s an important lesson in the story of Section 28, which is that rights won can easily be lost again. There are plenty of people who would not hesitate to bring back similar laws if they thought they could get away with them.  They are trying to do so now with a sustained assault on the rights of transgender people. That’s why it is important for LGBTQ+ people not only to stand up for their rights, but to campaign for a more open, inclusive and discrimination-free environment for everyone, everywhere, including in the workplace. That’s one of the reasons why today’s LGBTQ+ STEM Day is so important.

LGBTQ+ STEM DAY 2021! (#LGBTSTEMDay)

Posted in Biographical, LGBTQ+ with tags , on November 18, 2021 by telescoper

So here we are once again on LGBTQ+ STEM Day! Last year on this day I gave a talk via Zoom and remember hoping that the following year we could have an in-person event in Maynooth but alas that was not to be. Nevertheless I can at least use the medium of this blog to wish all LGBTQ+ persons working in STEM subjects around the globe a very enjoyable day. You can find out about events near you by checking here, looking for the hashtag #LGBTQSTEMDay on social media or by following the twitter account:

Voices and Faces

Posted in Biographical with tags , , on November 17, 2021 by telescoper

Regular readers of this blog will know that I listen to the radio much more often than I watch the TV. In fact I was thinking last night that I might make the forthcoming Christmas break entirely television-free, to give me a chance to catch up on reading and listen to music when I’m not drinking wine or cooking and eating food.

Anyway, I was listening to the radio last night and it struck me that whenever I hear the voice of someone whose face I have never seen my brain seems to construct a to want to construct a mental image of what the person looks like. This not only happens when listening to the radio but also when talking to someone on the phone. It seems an automatic process over which I have no conscious control. If and when I subsequently find out what the person actually does look like they’re rarely anything like I’d imagined, so whatever process goes on in my head is not very accurate!

But what is the process?

My theory – for which I have absolutely no evidence – is that my brain kind of runs through my memory bank of voices and the faces that go with them, tries to find the closest matches to the voice I’m hearing, and then constructs an image as a kind of amalgam of those identified. The assumption would be that people who sound the same might tend to look the same, which is obviously more than a little dodgy.

Obviously there is contextual information too. Gender and race and age influence the process, for example, but there are many other factors. If I hear the voice of someone on the radio who is introduced as, say, an opera singer my brain probably try to find a match among the faces of opera singers I have seen, and so on.

I’d be interested to know if anyone shares this experience of trying to put a face to the voice and what is going on in the brain when it happens!

As a related issue I remember a discussion in a pub a while ago – back in the days when I used to have discussions with people in pubs – about faces. Some people are considered have more attractive faces than others (an entirely subjective statement) but there’s something about certain faces that makes the owner of the face appear kind as opposed to being beautiful or handsome or otherwise attractive.

People with kind faces appear to be friendly and sympathetic and, by implication, more approachable, which encourages other people to talk to them in a way that they probably would not talk to others. This is not always a positive move. I remember a female colleague in Cardiff – who is aware that she does have such a kind of kind face – telling me that she often got a bit fed up with other colleagues unburdening themselves in conversation with her about things she’d rather not know about.

Anyway I know quite a few people that I would say have kind faces but I don’t know what it is that makes them appear so. It may be something about the shape of the face, softer features, the eyes….or what?

So Question 2 for today’s discussion is: what makes a face look kind?

Half Measures

Posted in Biographical, Covid-19, Education, Maynooth with tags , , on November 16, 2021 by telescoper

Against the backdrop of rapidly rising numbers of Covid-19 cases the Irish Government today announced the return of some restrictions, including the closure of hospitality venues no later than midnight and a return to working from home “unless absolutely necessary”. On the latter, however, it has said that “There will be no reintroduction of remote learning for schools and third-level institutions at this point”.

I think the key phrase is “at this point”. I don’t think the new measures go nearly far enough and they will have to be revisited in a week or two, at which point we will revert to remote (online) teaching. Although we haven’t been give guidance yet, I think we’ll be carrying on with in-person lectures and tutorials at Maynooth for the time being, but it’s no more than an even money bet that we’ll stay that way until the end of term. I would also suggest that the odds are very much against us actually having examinations on campus in January. We await further guidance from the University about this, so I don’t know. The timetable for the January examinations is due to be published next week so a decision will have to be made very quickly.

What I do know, though, is that my second vaccine dose was on June 8th. The Government has now announced that 50-59 year olds (which includes me) can now get a third (booster) dose six months from their last one. In my case that is December 8th. But the roll-out of boosters has been painfully slow in Ireland, and most of the over-60s haven’t had theirs yet. It’s likely to be weeks or months until I get an appointment for mine.

We might have to switch to remote teaching in a while anyway if the rules are changed but I have made the decision that if I haven’t got my booster by December 8th I’ll be working from home and switching all my lectures online. Term ends on December 17th so I’ll only have to give a few remote lectures, but for me it is a matter of principle.

By deciding that in person teaching is “absolutely essential” the Government has admitted that lecturers are frontline staff and we should accordingly get a booster dose at the appropriate time. I’ve worked countless hours of unpaid overtime during this pandemic and I’m not going to continue without adequate protection from infection.

Astrophysics & Cosmology Masterclass – The Video!

Posted in Education, Maynooth, The Universe and Stuff, YouTube with tags , , , on November 15, 2021 by telescoper

As promised here is the video recording of the Astrophysics & Cosmology Masterclass we held by Zoom last Friday.