R.I.P. Chick Corea (1941-2021)

Posted in Jazz with tags , , on February 11, 2021 by telescoper

I was just about to have an early night when I saw the news of the death at the age of 79 of legendary jazz pianist Chick Corea. Yet another of the Greats is no more.

In the circumstances I’ll just put up one example that demonstrates his talents both as a pianist and a composer. Chick Corea was in at the start of jazz fusion in the late Sixties when he joined Miles Davis’s band. At that time and through the 1970s he frequently performed on electric piano superb records such as In A Silent Way and Bitches Brew. He played on a huge range of records sometimes as leader, sometimes as a sideman and sometimes in a duet. One of the first jazz albums I bought was a live recording of a concert in Zurich in 1979 together with vibraphonist Gary Burton. I’ll certainly be playing that this weekend.

This track was recorded at a live performance in 2013 and released on the album Trilogy. It is a great example of him stretching out on a version of his own tune Armando’s Rhumba, of which he has recorded many very different versions, and which is now a jazz standard. The drummer is Brian Blade and the bassist Christian McBride.

Rest in peace, Chick Corea (1941-2021)

LIGO: Live Reaction Blog

Posted in Uncategorized on February 11, 2021 by telescoper

I don’t usually reblog my own posts, but this is just to mark the fact that the first discovery of gravitational waves by Advanced LIGO was announced on this day in 2016.

Can that really have been 5 years ago?

telescoper's avatarIn the Dark

So the eagerly awaited press conference happened this afternoon. It started in unequivocal fashion.

“We detected gravitational gravitational waves. We did it!”

As rumoured, the signal corresponds to the coalescence of two black holes, of masses 29 and 36 times the mass of the Sun.

The signal arrived in September 2015, very shortly after Advanced LIGO was switched on. There’s synchronicity for you! The LIGO collaboration have done wondrous things getting their sensitivity down to such a level that they can measure such a tiny effect, but there still has to be an event producing a signal to measure. Collisions of two such massive black holes are probably extremely rare so it’s a bit of good fortune that one happened just at the right time. Actually it was during an engineering test!

Here are the key results:

LIGO

Excellent signal to noise! I’m convinced! Many congratulations to everyone involved…

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The Angelus

Posted in Television with tags , , on February 10, 2021 by telescoper

It’s been a tradition in Ireland since 1950 for the main TV station (RTÉ One) to broadcast The Angelus at 6pm just before the main news . Initially this involved the Angelus, a Catholic prayer along with religious imagery and the sound of the bells of St Mark’s Pro-Cathedral in Dublin (originally live, but then later recorded). Nowadays the bells are still heard, but there is no explicitly religious content. Instead, there are short films of everyday life lasting about 70 seconds.

Here’s an example of one of the Angelus films. I think it’s rather lovely.

I know many Irish people think the Angelus should be ditched on the grounds that it is foisting religion on people. Although I am not religious I find it a wonderful haven of tranquility in the one minute and ten seconds of the Angelus broadcast each evening, especially in these days of Covid-19. It’s good to pause and contemplate the simple pleasures of life before heading into the news. The secretary of the Clonskeagh Mosque in Dublin and the Chief Rabbi of Ireland have supported keeping the Angelus. As an atheist I agree with them. Long may the Angelus continue. It’s one of the very few things I watch regularly!

Cold Snap

Posted in Maynooth on February 9, 2021 by telescoper

I just thought I’d try out something I’ve never done on here before: sharing an Instagram post. I’m curious to see what it looks like.

It’s also an opportunity to state for the record that we’re in a bit of a cold snap here in Maynooth. It’s snowed off and on most of today. Note however that the pictures are from 2018…

The Irish word for snow, incidentally, is sneachta.

Yesterday, before the snow arrived, I filled the bird feeders in my garden. This morning, when the snow was just starting, the peanut feeder was almost empty. It normally takes 4-5 days to become depleted. It’s as if the birds had been reading the forecast and decided to fatten up! Birds do seem to know when bad weather is on the way…

I ventured out before my lecture this morning to replenish the supply. I wonder if I’ll need to do it again tomorrow?

R.I.P. John Pullin (1941-2021)

Posted in Rugby with tags , on February 9, 2021 by telescoper

I was saddened yesterday to hear news of the death at the age of 79 of former England rugby captain John Pullin. The name is familiar to me from my youth – he was England captain when I started to learn how to play rugby at the grammar school I went to, but will also be familiar anyone who remembers that famous match between the Barbarians and the All Blacks in Cardiff way back in 1973. Pullin, one of just three Englishmen* in the side, was the hooker for the Barbarians, so threw in the ball at the line-out that led a few glorious minutes later to that try via a move in which he also played a part, receiving the ball from JPR Williams (whom Bryan Williams was tackling around the neck) and passing it to John Dawes whose dummy led to a scintillating burst out of defence. In fact Pullin’s were the only English hands to touch the ball in that move!

*The English rugby team of the early 1970s wasn’t very strong, even less so when compared with the Welsh!

Phosphine on Venus again…

Posted in Astrohype, The Universe and Stuff with tags , , , on February 8, 2021 by telescoper

Remember all the excitement last September about the claimed detection of Phosphine in the atmosphere of Venus? If you do you will remember that the claim has been contested. Now there is another paper on this matter claiming that what was interpreted as a spectral feature due to Phosphine (PH3) could actually be due to Sulphur Dioxide (SO2)). Here is the abstract of the latest paper.

You can find the full paper on the arXiv here.

P.S. I bookmarked the arXiv paper about a week ago but was very busy and forgot about it until now!

Goin’ Down Slow – Archie Shepp & Horace Parlan

Posted in Covid-19, Jazz with tags , , , , , on February 7, 2021 by telescoper

I just updated my Coronavirus page with the days statistics for Ireland (1024 new cases, 12 deaths). We’re obviously well past the Christmas peak but cases are falling very slowly. At this rate we’ll still have several hundred a day by the end of February (which, incidentally will be a year since the first Covid-19 case was recorded in Ireland).

Unlocking with case levels in the hundreds before Christmas was a disaster and I sincerely hope there’s no repeat of that foolishness.

Anyway, the current state of play remind me of this track from a great album called Trouble in Mind which I bought as a vinyl LP about 40 years ago. It’s by Archie Shepp (tenor sax) and Horace Parlan (Piano). Both made their reputations as avant garde jazz musicians but in this album they went back to the roots and explored the classic blues repertoire. Goin’ Down Slow dates back to 1941 and it’s a standard 12-bar blues (usually performed in B♭). Horace Parlan passed away in 2017, but Archie Shepp is still going strong.

 

Celtic Europe

Posted in History, Irish Language with tags , , , , on February 6, 2021 by telescoper

The Extent of Celtic Europe, from “Dictionary of Languages” by Andrew Dalby

Following on from Thursday’s post I thought I’d show the above map that shows the spread of Celtic languages in Europe. I’m sorry that the picture isn’t great but I scanned the map from a big hardback book and the map spreads across the fold as you can see.

The Celtic languages at the time depicted in the map (1st Century BC) were all oral languages, but when the Roman Empire spread across Europe about two thousand years ago it came into contact with the major dialects. Evidence for these can be found in place names, from Mediolanum (modern-day Milan, originally in cisalpine Gaul) to Singidunum (the Roman name for modern-day Belgrade) and Laccobriga (Lagos in Southern Portugal).

Belgium gets its name from the Belgae, regarded by Julius Caesar as the bravest and most fearsome of the tribes of Gaul. There are also words recorded in early inscriptions and in reconstructions based on later texts from which it is possible to glean clues about these languages. The picture that emerges is of a network of dialects spoken by Celtic peoples that inhabited a swathe of Continental Europe from the Iberian peninsula in the West to Galatia in the East, much of the Danube valley, and from Cisalpine Gaul (now part of Italy) in the South to modern-day Germany in the North.

Galatia (in classical Asia Minor) merits a special mention. St Paul’s Letter to the Galatians was addressed to the young Christian churches in this Celtic-speaking enclave which was then a distant province of the Roman Empire.

Linguists refer to the language that was spoken in Ireland at this time as Goidelic and it sits apart from the others because Ireland was never part of the Roman Empire. Brythonic is the name given to the dialects spoken in Britain. Continental Celtic is the name given to the dialects stretching all the way from Spain to Galatia of which the largest group was Gaulish. The language of the Scottish highlands Pictish may have been a separate subdivision but I don’t think anybody really knows because the language is extinct.

None of these groups was homogeneous. The Celts lived in relatively small communities and there were many regional variations even within each major group. Irish has four main dialects, roughly aligned with the four provinces. In Description of Ireland (1577), Richard Stanyhurst wrote:

As the whole realme of Ireland is sundred into foure principal parts so eche parcell differeth very much in the Irish tongue, euery country hauing his dialect or peculiar manner in speaking the language.

Our Irish teacher speaks the Irish of Connacht in which some pronunciations are very different from Leinster, which is the province I live in. As an absolute beginner this is the least of my worries at the moment.

The Goidelic group comprises Irish, Manx and Scottish Gaelic; and the Brythonic group that comprises Welsh, Cornish and Breton. These are sometimes referred to as q-Celtic and p-Celtic, respectively, although not everyone agrees that is a useful categorization. It stems from the fact that the “q” in Indo-European languages morphed into a “p” in the Brythonic languages. The number five in Irish is a cúig which has a q sound (though there is no letter q in the Irish alphabet); five in Welsh is pump. Contrast with the number two: a dó in Irish and dau in Welsh.

Incidentally, Scottish Gaelic is not the language spoken by the Celtic people who lived in Scotland at the time of the Romans, the Picts, which is lost. Scottish Gaelic is actually descended from Middle Irish due to migration and trading contacts. The Ulster dialect of Irish is in turn much influenced by reverse migration from Scotland. Languages do not evolve in isolation or in any simple linear trajectory.

Contrary to popular myth, Breton is not a Continental Celtic language but was taken to Brittany by a mass migration of people, which peaked in the 6th Century AD, from South-West Britain, fleeing the Anglo-Saxons. The Saxons won a great victory in battle at Dyrham (near Bath) in 577 after which they advanced through Somerset and Devon, splitting the Celts of Cornwall and Wales and leading to the formation of two distinct Brythonic language groups, Welsh and Cornish. Breton is much closer to Cornish than Welsh.

The Continental Celtic languages are all extinct, except for fascinating remnants that linger here and there in local dialect words in French and Spanish.

Open Journal of Astrophysics Impact Factor Poll

Posted in Open Access with tags , , on February 5, 2021 by telescoper

A few people ask from time to time about whether the Open Journal of Astrophysics has a Journal Impact Factor.

For those of you in the dark about this, the impact factor for Year N, which is usually published in year N+1, is based on the average number of citations obtained in Year N for papers published in Years N-1 and N-2 so it requires two complete years of publishing.

For the OJA, therefore, the first time an official IF can be constructed is for 2021, which would be published is in 2022 and it would be based on the citations gained in 2021 (this year) for papers published in 2019 and 2020. Earlier years were incomplete so no IF can be defined.

It is my personal view that article-level level bibliometric data are far more useful than journal-level descriptors such as the Journal Impact Factor (JIF). I think the Impact Factor is very silly actually. Unfortunately, however, there are some bureaucrats that seem to think that the Journal Impact Factor is important and some of our authors think we should apply to have an official one.
What do you think? If you have an opinion you can vote on the twitter poll here:

https://twitter.com/OJ_Astro/status/1357653546146136069

I should add that my criticisms of the Journal Impact Factor are not about the Open Journal’s own citation performance. We have every reason to believe our impact factor would be pretty high.

Comments welcome.

Language Lessons

Posted in History, Irish Language, Maynooth with tags , , , , , , , , , , on February 4, 2021 by telescoper

Thursday is Computational Physics Day this term so this morning I delivered the first Panopto lecture of that module and in the afternoon we had our first laboratory session. The students are all at home of course so we had to run the lab with them using their own laptops rather than the dedicated Linux cluster we have in the Department and interacting via Microsoft Teams.  The first lab is very introductory so it was really just me presenting and them following on their machines without too much interaction. The ability to share a screen is actually very useful though and I imagine using it quite a lot to share Spyder. It went fairly well, I think, with all the students getting started out on the business of learning Python.

In between lecturing the morning and running the laboratory session this afternoon I had the chance to study another kind of language. Soon after I first arrived in Maynooth I got an email from Maynooth University about Irish language classes. Feeling a bit ashamed about not having learned Welsh in all my time in Cardiff, I thought I’d sign up for the Beginners class and fill in a Doodle Poll to help the organizers schedule it. Unfortunately, when the result was announced  it was at a time that I couldn’t make owing to teaching, so I couldn’t do it. That  happened a couple of times, in fact. This year however I’ve managed to register at a time I can make, though obviously the sessions are online.

I’m not sure how wise it is for me to try learning a new language during a term as busy as this, but I have to say I enjoyed the first session enormously. It was all very introductory, but I’ve learnt a few things about pronunciation – unsurprisingly the Irish word for pronunciation fuaimniú is unsurprisingly quite difficult to pronounce – and the difference between slender and broad vowels. I also learnt that to construct a verbal noun, instead of putting -ing on the end as you would in English, in Irish you use the word ag in front of the verb.

That’s not to say I had no problems. I’m still not sure I can say  Dia duit (hello) properly. The second “d” is hardly pronounced. 

Irish isn’t much like Welsh, which I failed to learn previously.  Although Irish and Welsh are both Celtic languages they are from two distinct groups: the Goidelic group that comprises Irish, Manx and Scottish Gaelic; and the Brythonic group that comprises Welsh, Cornish and Breton. These are sometimes referred to as q-Celtic and p-Celtic, respectively, although not everyone agrees that is a useful categorization. Incidentally, Scottish Gaelic is not the language spoken by the Celtic people who lived in Scotland at the time of the Romans, the Picts, which is lost. Scottish Gaelic is actually descended from Middle Irish. Also incidentally, Breton was taken to Brittany by a mass migration of people from South-West Britain fleeing the Anglo-Saxons which peaked somewhere around 500 AD. I guess that was the first Brexodus.

Welsh and Irish don’t sound at all similar to me, which is not surprising really. It is thought that the Brythonic languages evolved from a language  brought to Britain by people from somewhere in Gaul (probably Northern France), whereas the people whose language led to the Goidelic tongues were probably from somewhere in the Iberia (modern-day Spain or Portugal). The modern versions of Irish and Welsh do contain words borrowed from Latin, French and English so there are similarities there too.

Only a diacritic mark appears in Irish, the síneadh fada (`long accent’), sometimes called the fada for short, which looks the same as the acute accent in, e.g., French. There’s actually one in síneadh if you look hard enough. It just means the vowel is pronounced long (i.e. the first syllable of síneadh is pronounced SHEEN). The word sean (meaning old) is pronounced like “shan” whereas Seán the name is pronounced “Shawn”.

One does find quite a few texts (especially online) where the fada is carelessly omitted, but it really is quite important. For example Cáca is the Irish word for `cake’, while the unaccented Caca means `excrement’…

I took the above text in Irish and English from the front cover of an old examination paper. You can see the accents as well as another feature of Irish which is slightly similar to Welsh, the mysterious lower-case h in front of Éireann. This is a consequence of an initial mutation, in which the initial character of word changes in various situations according to syntax or morphology (i.e. following certain words changing the case of a noun or following certain sounds). This specific case is an an example of h-prothesis (of an initial vowel).

In Welsh, mutations involve the substitution of one character for another. For example, `Wales’ is Cymru but if you cross the border into Wales you may see a sign saying Croeso i Gymru, the `C’ having mutated. The Irish language is a bit friendlier to the learner than Welsh, however, as the mutated character (h in the example above) is inserted in front of the unmutated character. Seeing both the mutated and unmutated character helps a person with limited vocabulary (such as myself) figure out what’s going on.

Mutations of consonants also occur in Irish. These can involve lenition (literally `weakening’, also known as aspiration) or eclipsis (nasalisation). In the case of eclipsis the unmutated consonant is preceded by another denoting the actual sound, e.g. b becomes m in terms of pronunciation, but what is written is mb. On the other hand, lenition is denoted by an following the unmutated consonant. In older forms of Irish the overdot (ponc séimhithe) -another diacritic – was used to denote lenition.

Anyway, I’ve seen Dia duit written Dia dhuit which might explain why the d sounds so weak. We live and learn. If I keep at it long enough I might eventually be able to understand the TG4 commentary on the hurling..