Archive for January, 2017

Chance’s Beard to Darwin

Posted in Beards, History with tags , , , , on January 25, 2017 by telescoper

One of my global team of unpaid researchers emailed me to tell about this short video, one of a series called Curious Objects commissioned by Cambridge University, which tells the story of a rather hairy encounter between Charles Darwin and a man called Dr Frank Chance. Dr Chance attempted to counter Darwin’s claim in Descent of Man that beard hair is always lighter than hair on the head – and went as far as sharing some of his own trimmings with the great man himself (although he seems to have had plenty of his own).

Is it true that beard hair is always lighter than scalp hair? And what about other hair…..the downstairs kind even?

Sci-Comm: What is to be done?

Posted in Uncategorized on January 25, 2017 by telescoper

Very important post which articulates some serious issues around science communication, especially that “outreach” needs to be far more than a problem exercise or an element of a recruitment strategy, which is how it has come to be viewed in many universities.

Literacy of the Present's avatarLiteracy of the Present

Science communication has failed

Rearranging the furniture in the White House are a President who said climate change was a hoax, and a Vice-President who does not accept the theory of evolution. The rest of Trump’s cabinet is an equally deplorable bunch when it comes to science (or, indeed, anything else when it comes to being decent and humane).

I’m not blaming science communication for the election of Trump. But Trump’s Presidency is evidence that science communication has failed.

You might say that this has little to do with science communication, that Trump won the election on other issues but this only shows that science-based issues were not seen as important enough – also a failure.

And Brits should not be so smug either, with their vote for Brexit and their “had enough of experts”.

What we have clearly seen in recent months is that facts are not enough no…

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Back to the (Early) Universe

Posted in Education, The Universe and Stuff with tags , , , on January 24, 2017 by telescoper

After what seems like ages away from the lecture theatre, today I resuming teaching duties with the first session of my module on The Physics of the Early Universe; the link there gives Enzo Pascale as being in charge of the module, but he has left BrExit Britain for his native Italy so I’ve taken his place. I actually wrote the syllabus for this module about five years ago when I worked in Cardiff previously, and was scheduled to deliver it in 2013, but I left for Sussex before it started and never actually lectured it. It’s nice to be able to teach this material at long last – at least it’s stuff that I should know something about.

This lectures are attended by students on the 4th year of the integrated Masters programme (MPhys) and also on stand-alone MSc courses in Physics or Astrophysics. I have about 25 students enrolled, which is not bad for a specialist module.

In fact Enzo recommended the book I wrote with Francesco Lucchin when he taught the module, and I’m happy to use it as the main text. I won’t cover all the material in the book – there isn’t time, and some of the book is out of date (written in 2002) – but at least almost everything I do in the lectures has a counterpart in the book.

Chapter 3 of Coles \& Lucchin has a chapter that may prove particularly popular in this era of ‘Alternative Facts’:

cosmology

I did however resist the temptation to hire a group of people to sit at the front of my first lecture cheering and clapping wildly.

I’ve asked to have my lectures timetabled in two-hour chunks. That’s partly because I only work part-time and I wanted to be able to maximize the flexibility with which I can use the rest of the time by concentrating my teaching commitments. The other reason is that I like the extended format. I don’t talk continuously for the whole time, of course. That would be unbearable for me and for the students. We have a ten-minute break in the middle. However, the two-hour block allows a wider range of activities – lecturing, discussion and worked examples – which is harder to do in the usual (50-minute) slot without being excessively rushed. When I taught postgraduates at Queen Mary we used two-hour blocks, which worked out quite well. The only problem is that I’m now a lot older, and having finished my first double-lecture I think it’s fair to say I’m more than a little knackered.

Another innovation is the use of Cardiff’s new lecture-capture system (called Panopto), which allows the lecturer to record everything – powerpoint, data visualizer, whiteboard and live action – for posterity. I recorded this morning’s lecture in toto and at some point when I get a moment I’ll do a quick edit and put it on Learning Central for the students to view at their leisure. I’m not sure how useful my ramblings will prove to be, but it’s fun to try these things. It’s a significantly more sophisticated and flexible system than the one we used when I was at Sussex, and I’m also lucky to be in a nice, clean and recently refurbished lecture theatre…

Anyway, this gives me the excuse to refloat an old opinion poll about lecture capture. Such facilities are of course very beneficial for students with special learning requirements, but in the spirit of inclusive teaching I think it’s good that all students can access recorded lecture material. Some faculty are apparently a little nervous that having recordings of lectures available online would result in falling attendances at lectures, but in fact the available evidence indicates precisely the opposite effect. Students find the recorded version adds quite a lot of value to the “live” event by allowing them to clarify things they might not have not noted down clearly.

I like the idea of lecture capture a lot and am very happy to do it with my own lectures. It does seem to be the case however that some university staff are wary of this innovation, but opinion may be changing. Please let me know what you think via the poll:

If you don’t like the idea I’d welcome a comment explaining why. I’d also be interested in comments from colleagues in other institutions as to the extent to which lecture capture technology is used elsewhere..

 

How the Nonbaryonic Dark Matter Theory Grew [CEA]

Posted in The Universe and Stuff with tags , , on January 24, 2017 by telescoper

Another arXiver post, this time from the great Jim Peebles. Always a skeptic about dark matter, especially cold dark matter, it is the hallmark of a great scientist that he weighs up the evidence as objectively as possible.

This is a long review, but well worth reading for its important insights and historical perspective. I agree that the case for non-baryonic dark matter is compelling, but it is also far from proved and it’s still possible that an alternative, equally or more compelling, theory will be found.

arxiver's avatararXiver

http://arxiv.org/abs/1701.05837

The evidence is that the mass of the universe is dominated by an exotic nonbaryonic form of matter largely draped around the galaxies. It approximates an initially low pressure gas of particles that interact only with gravity, but we know little more than that. Searches for detection thus must follow many difficult paths to a great discovery, what the universe is made of. The nonbaryonic picture grew out of a convergence of evidence and ideas in the early 1980s. Developments two decades later considerably improved the evidence, and advances since then have made the case for nonbaryonic dark matter compelling.

Read this paper on arXiv…

P. Peebles
Mon, 23 Jan 17
37/55

Comments: An essay to accompany articles on dark matter detection in Nature Astronomy

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Freedom of Movement isn’t the problem – The problem is in the way the UK fails use the available controls

Posted in Politics with tags , , on January 23, 2017 by telescoper

Here’s an important corrective to some of the misinformation about “Freedom of Movement” within the EU. A summary is that controls are available, but the UK government has never implemented them.

I maintain that freedom of movement is one of the benefits of EU membership, not one of the costs. Why are we throwing away so much to deal with a non-existent problem?

This also explains why the David Cameron’s bluster didn’t persuade anyone in the EU to jump through hoops on his behalf. We could have reduced migration ourselves within existing regulations, but decided not to, no doubt because of the positive economic benefits.

RemaininEU's avatarbrexit853

Myth Buster – Debunking the horror stories surrounding the EU Freedom of Movement directive. 

 Currently Theresa May has made stopping FoM a red-line issue even at the expense of the UK’s membership of the Single Market.

Introduction

 One of the four freedoms enjoyed by EU citizens is the free movement of workers. This includes the rights of movement and residence for workers, the rights of entry and residence for family members, and the right to work in another Member State and be treated on an equal footing with nationals of that Member State. Restrictions apply in some countries for citizens of Member States that have recently acceded to the EU.

There appears to be 4 major arguments in favour of stopping EU migrants exercising this freedom to come and work in the UK. It is my intention to debunk each of these arguments as plainly false.

Claim 1 – “Inability…

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Mahler’s Sixth Symphony

Posted in Music with tags , , , on January 23, 2017 by telescoper

“Darkness, turbulence and an unmistakable undertone of violence” –  what could be a more fitting way to spend a Friday evening in January 2017 than listening to the epic Sixth Symphony by Gustav Mahler. So apt is this work for the times we’re living through that it was performed on Thursday evening by the London Symphony Orchestra conducted by Sir Simon Rattle and broadcast live on BBC Radio 3; you can catch that performance on the BBC iPlayer here. I’ve always preferred my music live rather than recorded, so I went to St David’s Hall on Friday to hear it performed by the BBC National Orchestra of Wales under the direction of Thomas Søndergård. This was recorded live, and will be broadcast by BBC Radio 3 on Friday 27th January, and available thereafter on iPlayer so you can compare the two versions if you want to.

Before the main course, we heard the excellent BBC National Chorus of Wales singing four motets by another late Romantic composer, Anton Bruckner. The pieces chosen were all settings of latin religous texts: Locus Iste, Os Justi, Christus Factus Est, and Ave Maria. These are beautiful works, and interesting because of the many references they include to earlier musical forms, especially in the Os Justi which is in the Lydian mode, harking back to what at the time it was written (1879) was an obsolete church scale.

These four works last only about 15 minutes in total. That explains why the bar staff weren’t taking interval orders before the concert started – there simply wouldn’t have been enough time to put the drinks out before the first half finished. Fortunately, my seat was near the door of the auditorium so I was able to make a quick escape and get my usual glass of wine at the bar before most of the audience.

And then the Mahler. What can I say? It’s another huge symphony, in four movements lasting about eighty minutes, requiring a huge orchestra including tubas, bass trombones, harps and varied percussion including cowbells, a celesta, and of course the famous hammer..

I mentioned earlier on that I much prefer live concerts. One of the things that I remember vividly from last Friday was the sight of the huge wooden mallet that is used to deliver the “hammer blows of fate” in the final movement, which loomed ominously on stage in front of the percussion section throughout the performance. When it was finally deployed it came down with such force that it buckled the wooden box underneath, but even when it wasn’t being used it had a powerful stage presence. That’s one kind of experience you’ll never get from a recording.

The first movement of this Symphony (Allegro energico) is a battle between a strident march theme and a passionate romantic melody, though the conflict is interrupted by a lengthy passage of remarkable peace and tranquility. In Mahler’s original version of this work, the Scherzo movement (in which the two main themes return in an even more agitated struggle) came second, but on reflection he swapped it with the Andante, which is measured and reflective but still with an undertone of foreboding. I’m not sure if anyone ever performs the original ordering anymore, but out of curiosity I’d like to hear it performed that way. The tonality and thematic content of the Scherzo mean it is more closely related to the Allegro than the Andante, which has led some to argue that, despite what Mahler thought, it should be played second. I don’t think that follows necessarily, but it would be interesting to hear how it works.

The final movement is vast, intense, emotionally draining and absolutely wonderful. The mood changes continually from terror to euphoria, from triumph to tragedy and from optimism to despair. Many people I know dismiss Mahler’s music as “angst-ridden”. I don’t think you can describe all his compositions like that, but it’s fair to say that this symphony is bleak and ultimately nihilistic in its despair. The hammer blows of fate (three in the original composition, with one later removed by Mahler) signal the end of hope, but the end is a whimper rather than a bang. The music subsides into nothingness,  its light fading  into the “Dark Night of the Soul”.

It’s no surpise that this is often called the “Tragic Symphony”, but however bleak the message may seem, it’s always uplifting to experience the “artistic conquest of the terrible”. If civilization is to survive in a world filled with suffering and arbitrary cruelty, then we have to come to terms with reality, not shy away from it. Mahler is one composer who isn’t afraid to tell it the way it is.

The BBC National Orchestra of Wales was on top form for this concert – with outstanding work by the brass section in particular – and were marshalled with great vision and a mastery of detail  by Thomas Søndergård. I’m sure I’ll remember this performance for a very long time.

The Key-Note

Posted in Poetry with tags , on January 22, 2017 by telescoper

Where are the songs I used to know,
Where are the notes I used to sing?
I have forgotten everything
I used to know so long ago;
Summer has followed after Spring;
Now Autumn is so shrunk and sere,
I scarcely think a sadder thing
Can be the Winter of my year.

Yet Robin sings through Winter’s rest,
When bushes put their berries on;
While they their ruddy jewels don,
He sings out of a ruddy breast;
The hips and haws and ruddy breast
Make one spot warm where snowflakes lie
They break and cheer the unlovely rest
Of Winter’s pause – and why not I?

by Christina Rossetti (1830-1894)

 

Sunday Bloody Sunday

Posted in Biographical, Film, LGBTQ+, Television with tags , , , , on January 22, 2017 by telescoper

I realized this afternoon that I was going to have to come into my office at Cardiff University as there is something I was supposed to finish by midnight today and I had forgotten to bring some stuff I needed to complete it. Setting aside the absurdity of an employer who sets deadlines at 24.00 on a Sunday evening, I was planning to have a quiet night doing the Azed crossword. As I got ready to leave the house I heard myself muttering “Sunday Bloody Sunday” under my breath, and walking through town to get here I was thinking about John Schlesinger’s 1971 film of that title, starring Glenda Jackson, Peter Finch and Murray Head. This film was shown on TV – rather late at night – when I was a teenager in the late 1970s and I’ll never forget the impact this particular scene had on me then. Here’s a clip of Murray Head talking about the scene, which caused quite a stir at the time in some quarters, in which he describes it as a “giant step forward”. Let’s hope we’re not all about to take giant steps backward.

Women’s March in Cardiff 

Posted in Cardiff, Politics with tags , on January 21, 2017 by telescoper

Lots to do today so I’ll just make a note that this afternoon there was a Women’s March in Cardiff along with many around the world (including a huge one in Washington DC) to protest against misogyny and discrimination.

Here’s the scene near the statue of Nye Bevan on Queen Street (looking toward the Castle)  just before the March started around 1pm:

Love and respect to all who took part!

The new President of the USA

Posted in Politics with tags , on January 20, 2017 by telescoper

Well, today’s  the day of the inauguration of the new President of the the United States of America….

 

wink-putin_1291535b

God help us all.