Showing posts with label Theoretical Physics. Show all posts
Showing posts with label Theoretical Physics. Show all posts

Tuesday, 3 November 2020

Lockdown 2

Yet again, the Government has reluctantly announced a national lockdown, too little, and far too late.
Yet again, they decided not to follow the science.
Yet again, they've failed to deliver the Test/Trace/Isolate/Support system needed to rescue the economy.
Yet again, the Government's communications have been an embarrassing mess.
Repeatedly doing the same thing, and expecting a different outcome, is the definition of insanity.

Some people on the Internet claim that Einstein coined that phrase, but actually he didn't.

You don't *need* to be a genius to realise that it's true

Sunday, 29 March 2020

How to do Teleportation - A Brief Guide

Fun and Informative...


Saturday, 29 June 2019

Finding stuff

In 2012 the Higgs Boson was found, by the ATLAS and CMS teams working with the Large Hadron Collider, after being proposed by Peter Higgs in 1964.  That was 48 years later.

Then, in 2016, the scientists at LIGO and Virgo announced they had made the first direct observations of gravitational waves, proposed by PoincarĂ© in 1905 and predicted by Einstein in 1916 on the basis of general relativity.  That was 100 years later.

And more recently, just this May, we have seen a compelling first image of a black hole, based on a combination of radio telescopy signals.  However, they were known to exist for many years before that.

All pretty amazing, and all within a few years of each other.

But the one that really stood out for me was the one in the middle.  Party because there was something about the gravity waves I hadn't got, as a result of which I was consequently blown away when I went to a talk at the Royal Institution on the new discovery.  Because they are waves, just like water waves and electromagnetic waves.  This means that there is a spectrum of possible wavelengths which might be used for astronomical observations. 

The Virgo and LIGO teams were looking at very narrow wavelengths, and found several extreme events.  But their discovery has opened up a whole new experimental mode, a new branch of astronomy.  There's a wide range of wavelengths to explore.

Further, gravitational wavelength astronomy has been successfully combined with optical, radio and cosmic ray detectors to open up a new era of 'multi-modal' astronomy.  So if anything, its the successful discovery of  gravitational waves that seems to have the greatest potential for helping us discover new stuff.

Even if it took a long time to come.

 

Friday, 20 September 2013

Bohemian Gravity

Have to mention this.  I've just stumbled across it and it is wonderful...

Sunday, 10 March 2013

The Big Bang Visitor Experience Theory

I suppose it's true to say that over the last two years I've become a little addicted to The Big Bang Theory.  I've become a fan.

At its simplest, part of the attraction arises from the fact that most of the leads are physics or engineering geeks.  Or uber geeks. Sheldon et al have huge IQs and problematic social skills.  And you can't help loving them.

It is great that the main characters are interested in string theory, anisotropic universes and astronautics.  They love tech, and they are also into Stars Wars and Trek, Dr Who, comics, costumes and conventions. And they are surrounded by a bunch of other clever scientist people (and Penny).

Of course, as well as all the nerdy stuff, the other half of the show is admittedly more traditional - it's about relationships and love and stuff, and just how metrosexual is Raj? But it does all seem to fit together; we like watching these gawky individuals navigate a world full of other people.  The main characters are outlandish, at various places on the spectrum (of clever-idiocy, if nothing else), but likeable.

But mostly I think I like it because physics is in some way at its heart.

However, thinking about the show recently I realised that it has a significant weakness, and an obvious one.  The gang are keen on costumes and media SF, but they don't appear to read fiction.  They don't talk about Pterry, or China or Iain or Robert A.  When they argue over Star Trek or Babylon 5 they don't say a word about the writers.  Never a mention of The City on the Edge of Forever.  They appear to hold no opinion about Dean R Koontz. 

This may be partly because they still have an audience to connect to - there have to be points of contact which aren't too obscure.  Which is why they talk about Batman and the Flash rather than Rorschach or Dr Manhattan.   But the chief reason is more obvious. 

It's because it's on the telly.

Some time back, a fashion started amongst museums and galleries and their ilk to become more open to the public.  To let us 'behind the scenes' to see what they did with our money, and why they ought to be cherished. 

This resulted in lots of new buildings being designed and built to allow this to happen, and the signature element of many of these new ventures was the glass wall.  Physically transparent, it served as the thinnest possible membrane between the public and the behind-the-scenes experts who researched, conserved and curated the displays.  The Darwin Centre is an obvious example in London, but there are many others.

London Zoo caught this fever too.  I recall going to the newly Biodiversity Centre a few years ago, just after it opened.  An attractive, multi-level triangular building towards the southern corner of the site.  And yes, there were these huge glass walls opening on the keepers' offices, so we could see what they did at work.

I only once, ever, saw anyone doing anything in those rooms.

He was reading a book.

Doubtless a worthy and interesting book, about ants or cephalopods or the care and feeding of giraffes, but it didn't make a compelling visual feast.  There was no crowd of happy visitors clustered around the glass wall, watching him turn the pages.

It just wasn't good telly.

And that, I suspect, is ultimately why Sheldon, Leonard, Howard and Raj don't read SF, don't ever compare notes on the Culture or Discworld or Lundun.  Visually, it just ain't got it.  That is why they'll buy a George Pal Time Machine at auction, but never discuss Wells' original novella.

Having all four of them dress as the Flash is just so much funnier.  But that don't make it true.

Sunday, 25 November 2012

Wandering 1

And so as I explained earlier, a few weeks ago I wandered, reminiscing with permission, around the city of Durham.
There are three stags on Collingwood's crest, so there seemingly has to be a sculpture of a stag by the car park.  Who'd have thought it? 
This is just to make sure we keep to some of our brief here at TANH - a tree.
A view of the cathedral from between Collingwood & Grey
An old question I know but why is Grey so brown?
Here is the Grey hill, where the infamous Marching Song of the Fighting Uruk-Hai was first sung.  Well, I say sung...

At some point, when sufficiently inebriated, I may post it.
The path behind the tennis courts that leads down to the Science site avoiding South Road.  I remember this only too well...
But I don't remember this, the Ogden Centre for research into theoretical physics.  Built after my time. 
Although I seem to know quite a lot about it, as they regularly write to me (as a Physics alumnus) and ask for dosh...

Here are some parts of the old Science site I do remember.
... although the Library now has a new name...
Bryson is very kind to Durham in 'Notes from a Small Island' - and was also a very effective Chancellor (2005-2011).  On the University Web site he says:
I am struck by how expertly well you have a good time here. Durham students always seem to doing about a million things that have nothing to do with academic life and they are always doing them incredibly well. I cannot imagine there's any place in the world where fun is done more skilfully and well to a higher level than at Durham and often while you are having fun you do a lot of good.
So, fair enough. Why not  name a library after him?

Another tree...
The building below is also after my time - but some of the rooms inside it are named after people who were teaching way back then, such as professors Rosemary Cramp (History) and Arnold Wolfendale. 

The latter was Astronomer Royal for four years in the '90s.  I certainly sat in some of his lectures but I'm not sure how much he taught me. 

And he also features in the letters from the Ogden Centre...
More tree:
The Science site is undergoing development and expansion, as some departments move there from Palace Green.  I haven't really got my head around it...
Anyway, I left the Science site and headed into town past some of Durham's well-known sights...
...such as South Road...
... and the New Inn.
More reminiscent, meandering wanderings will follow.... (you have been warned).

Sunday, 12 February 2012

Moonshard

I've gone on record before to explain how much I detest the Shard - the huge skyscraper currently being built at London Bridge.  It will apparently be Europe's largest, and I still think it ugly, uneecessary and horribly wrong.

However, I read the other week that it will actually be an arcology.  That's right, a huge mega-structure, just like in Oath of Fealty and all those other skiffy novels.  So I had a look to see if it could be so, and eventually I found this on Wikipedia:-
The completed Shard will contain premium office space, a hotel, luxury residences, retail space, restaurants, a 15-storey public viewing gallery, and a spa.[26] A public viewing gallery will be located at the top of the tower, and is expected to draw over two million visitors a year.
So there you go.  Not an arcology, not even close.  No sense of independence from surrounding urban infrastucture, no self-sufficiency, no sense of heightened population dansity. It would have to be much bigger to qualify.  I'm not sure, but if the Shard was that much bigger I might just prefer it.  At least it would be more interesting.

However, I said I 'eventually' found that Wikipedia quote.  Because when I searched for 'shard' and 'arcology' the first hit I got said:- Arcologies on the Moon.  How could I not spend some time there?

So, this can be found on the relevant pages at forbiddenknowledge.com:-
If an ancient alien civilization built a city on Mars, Hoagland reasoned, why not on the moon and on Earth itself! Looking at photos taken during the lunar missions, including those taken during the Apollo lunar manned landings, he discovered several anomalies. Upon further investigation, he has found that there are immense "crystalline" cities on the moon that are even more advanced than the Cydonia buildings and a small, select group of people within NASA have probably known about them from the beginning of the space program! ...


In September, 1992, a few days after lift-off of Mars Observer, Richard Hoagland acquired a lunar atlas compiled by the Space Science Laboratory of North American Aviation, Inc. At first glance, each photo resembled the next - distance and close-up, craters and maria. Then his eye fell to the south-east corner of page 241, where the crater Triesnecker first appeared in the collection. One xerox enlargement later, and Richard knew he had taken his first step on what was to become the first stage of a new research project bridging the gap between the Earth, Mars and now the Moon...
This extraordinary photo revealed an unmistakable image of an equilateral triangle - the foundation of tetrahedral geometry, the hallmark of hyperdimensional physics & fluid dynamics - immortalized in a crater in the centre of the Moon...
The Ukert crater, with a perfect 16 mile equilateral triangle within it! This crater is located near the centre of the moon as viewed from Earth. At full moon, the triangle can be made out even with a small telescope. Note also the three brighter areas on the rim of the crater. If they are connected together with straight lines, another equilateral triangle is formed, resulting in two perfectly interlocking triangles! ...
Sticking up from an otherwise, flat, rounded, eroded lunar landscape, the "Shard" as it has been named is one and a half miles tall. Note the shadow to the left of the Shard....
To the left of the shard, a faint anomaly was photographed. After printing the negative over and over again at different exposure levels, and analyzing the results with various computer imaging processes, the anomaly was found to be a massive "tower/cube" hanging more than seven miles above the Moon! ...
I'm sorry, I spent a long time reading this stuff.  It gave rise to all sorts of thoughts and poor jokes about making sure castles in the air are built on firm foundations, and so forth.  The part I loved best was not "the foundation of tetrahedral geometry, the hallmark of hyperdimensional physics & fluid dynamics" -good as that was - it was "If an ancient alien civilization built a city on Mars, Hoagland reasoned, why not on the moon and on Earth itself!"

Indeed.

Thursday, 5 January 2012

Parallelism

Ok, so the notion that "ontogeny recapitulates philogeny" has been disproven (for some time) - but does ontology recapitulate epistemology?

Thursday, 15 December 2011

Scientific Cryptic

Just to register a very satisfying science and technology-based Cryptic from Arachne on Wednesday.  Very pleasurable! 
(And because I have that kind of background it was a point of honour to finish it!)

Thursday, 24 November 2011

... and a response

It did not last; the devil howling "Ho!
Let Einstein be!" restored the status quo.
J C Squire

Pope of the Day

Epitaph: Intended for Sir Isaac Newton, In Westminster-Abbey
Alexander Pope

ISAAC NEWTONIUS
Quem Immortalem,
Testantur, Tempus, Natura, Coelum:
Mortalem
Hoc Mamor fatetur.

Nature and Nature's laws lay hid in night:
God said, "Let Newton be!" and all was light.

Sunday, 16 October 2011

Poem of the Week

The Big Bang Theory Theme Song
Bare Naked Ladies

Our whole universe was in a hot dense state,
Then nearly fourteen billion years ago expansion started. Wait...
The Earth began to cool,
The autotrophs began to drool,
Neanderthals developed tools,
We built a wall (we built the pyramids),
Math, science, history, unraveling the mysteries,
That all started with the big bang!

"Since the dawn of man" is really not that long,
As every galaxy was formed in less time than it takes to sing this song.
A fraction of a second and the elements were made.
The bipeds stood up straight,
The dinosaurs all met their fate,
They tried to leap but they were late
And they all died (they froze their asses off)
The oceans and pangea
See ya, wouldn't wanna be ya
Set in motion by the same big bang!

It all started with the big BANG!

It's expanding ever outward but one day
It will cause the stars to go the other way,
Collapsing ever inward, we won't be here, it wont be hurt
Our best and brightest figure that it'll make an even bigger bang!

Australopithecus would really have been sick of us
Debating out while here they're catching deer (we're catching viruses)
Religion or astronomy, Encarta, Deuteronomy
It all started with the big bang!

Music and mythology, Einstein and astrology
It all started with the big bang!
It all started with the big BANG!

Sunday, 19 June 2011

New Laws of Nature Discovered!

Michael Gove, our idiot Education Secretary, has pontificated thusly according to The Times - as cited in The Guardian:
Gove said there had been previous attempts to make science relevant, by linking it to contemporary concerns such as climate change or food scares. But he said: "What [students] need is a rooting in the basic scientific principles, Newton's laws of thermodynamics and Boyle's law."

Absolutely marvellous.  And typically incompetent (and there are too many examples of the man's incompetence to list here).

How come he didn't check?  Or get someone else too? 

Or maybe he knows more about what Newton discovered than anyone else?

Friday, 25 March 2011

I Do Wish Professor Brian Cox Would Make Up His Mind

One moment he's telling us "Things Can Only Get Better," the next he's on about the Heat Death of the Universe.

I do wish he'd decide.

Saturday, 12 February 2011

Wolfram

The Saturday Guardian magazine this week - otherwise, to my mind, unreadable - apart from the Quiz - has a piece on Wolfram | Alpha this week.  The site you go to for real facts and data, rather than just everyone else's opinion.  And of course, linked-to from this Blog for ages (see right)

And last week they had a long piece on Michael Moorcock in the Review section that appeared to be quite sensible and understand its subject.  Even mentioned Dark They Were and Golden Eyed. 

Things seem to be  improving, marginally. Usually, the only stuff worth reading in the Saturday are Loomus, the crossword, Quiz, and one or two short bits in the Review. 

Still you have to buy it...

Thursday, 6 January 2011

Size and Scale

Of course, to understand size, you need to understand scale.
See here for help.

Sunday, 7 November 2010

Dandelion

Dandelion Mind is a new show by Bill Bailey, at the glorious, refurbished Wyndham’s theatre near Leicester Square.   On the general theme of doubt (or is it?).

Eldest and I went along.

What a good evening. BB - in case you don't know - is a highly talented comedian/musician; he came out, looked at the newly-decorated auditorium with its rich painted ceiling, chandelier and over-the-top pink-white ornamentation and immediately played something that sounded 18th century baroque-y harpsichord-y on his keyboard. “That’s what you need for a place like this, innit?”

This has to count as one of the best nights out I’ve had for many years (school events excluded of course – that wouldn’t be fair). We were in the second row of the stalls (an extravagance, plus we booked early), and the BB was at most 3-4 metres away from us for most of the show. From that angle, he seemed a God - admittedly a God that looked a lot like a bemused troll, but nevertheless…

Bailey seems to shamble on stage and do his stuff in a kind of stream-of-consciousness way, ad-libbing where necessary. And yet I think it's actually quite highly structured – with space for free-form flights of imagination where he needs them. So he begins with a structured rant against the Lib Dems (and Tories of course), which is very funny, before moving on to his despair at the England football team. He does them very well, but somehow I felt that there was little specifically Baileyish about these set pieces.

However, a little later, he reminded us just how superb his ad-libbing can be. Talking to a member of the audience, he said that the instrument he was holding was a lute. To which she apparently said “Ood”. This led to a wild fantasy which is very hard to describe properly – he repeated the word while slowly ageing on stage - imagining the ‘rise and fall of great civilisations outside the theatre – giant, scarlet crabs eventually taking over and superseding the human race’ while inside all was locked into ‘Ood. It’s an Oood. Ooood….’

This is an evening which ranges across a terrific range of subjects (and musical styles of course). At one point he explained why a spokesman for the Large Hadron Collider had said that there would be ‘inverse femtobarns’ of results. Ending – ‘it’s a kind of physicists joke, you see’. Which of course it is. (Look up the barn on Wikipedia – the physical unit – then the prefix femto – then consider the inverse. The spokesman meant there would be huge, uncountably many results). 

BB made this funny. A little later he gives us a speedy art-historical chat (with slides) on the history of the story of Doubting Thomas in renaissance paintings - also funny.  Marvellous.

Of course that approach means that some of the references he gives as asides don't work - he may have seen '2012' but it seemed few of his audience on Friday had...

A little later he moved back to science:

BB: Nuclear Fission, who knows how that works then? Come on, anyone?
(Nudged by eldest, I reluctantly raised a hand. Second row of the stalls, so I get spotted).
BB: Oh great. So you know about this stuff do you?
Me: Yes. (reluctantly)
BB: So I’ve always wondered. Is it like a kettle?
Me: Yes
BB: Great. So now I know. Nuclear fission’s like a kettle.
(Pause)
BB:Is it really like a kettle?
Me: No.
BB: So how’s it work then?
Me: Bits of stuff, bash together, bit of stuff left over comes out as energy, there you go.
BB: Great. Did you all hear that? Stuff comes together. Bish-bash-bosh (London accent - do I sound like that?) - Energy. So now we know.

I think he looked slightly disappointed. As though he wanted a proper description (and of course I’d confused fission and fusion in my ‘explanation’). Sigh.

And I do think he wants to know and talk about stuff properly. A little later, he was explaining how – in response to a London cabbie’s ‘Be Lucky!’ - he’d gone off on an existential rant on the meaning of luck and the pointlessness of the exhortation. Including a cross-reference to the feeling of being 'fated' as felt by Chaucer’s Palamon and Arcite in The Knight’s Tale. Nice.

I’d better shut up – although it is tempting to recite as much of the show as I can remember, that’d hardly be fair. Instead I’ll just end by exhorting all and sundry to go and see it for themselves. And stay for all of the encores…

Wednesday, 23 June 2010

Foyles

Eldest and I caught the bus into London yesterday. (Isn't it strange how natural that sounds, yet it is actually quite weird; we live in London - what I mean of course is we went into the centre of the city, but you wouldn't say that.  You might say  'we went into town' but again that makes it sounds as if it is a different, separate place.  Which I suppose it is, by comparison with Nunhead).  We'd decided to hang around and browse the big bookshops now that his A Level exams were over.

Once, when I was at University,  I had a summer job working in Foyles.  Well, twice actually - which was very rare.  When you applied for a job, and were called to the shop to see how you measured up, one of the tests you had to sit was a brief interview with Christina Foyle herself.  At that stage she was quite elderly (she must have been 65 when I first met her), and blue-rinsed, but she ran Foyles like a martinet and paid attention to every small detail. 

An abiding fear was theft - which is why for many years Foyles was organised on ridiculously inefficient lines, requiring customers to queue three times to buy a book.  Once at the counter to get the order chit (leaving your order behind to be bagged), once at the cash desk to pay - and to get the chit officially stamped, and then once again back at the desk to show your chit and pick up your purchase. The theory seemed to be that it kept the money away from the serving staff on the shop floor.

This was still happening in the late 1970s.

Anyway, Christina asked each applicant what they liked to read, what sort of books they were interested in, and then made sure they were never put any where near that department!  Again, it seemed that if you had no interest in the subject of the books you were selling, you wouldn't steal them. 

I got lucky - when she asked me what I liked, I said something like 'any fiction, really', and as a result  (after a brief sojourn in a book packing department servicing libraries), I was placed squarely in the Maths and Physics department.  Which was handy really, as that was what I was about to go and read at University!

I thus spent a very pleasant two months in the long hot summer of 1976 cycling into town (there, that phrase is again) and selling books I was very interested in, working for a mad Finnish woman called Lillian who cared lots for her commission but not a lot for the subject matter she was responsible for, and was very happy to have me.  For the record, I never stole a book - but I will admit that a lot of the publishers' reps found me remainders and damaged copies to help fill up my booklist...

That was also the summer of the Queen concert in Hyde Park.  I had to fight to get the time off - it was 'our busiest day of the year' - but I had some support from the middle managers who liked me and Tony Foyle - Christina's relatively sensible nephew. 

The concert was great, and I really enjoyed working in Foyles - there was a whole group of us waiting for A Level resultsat the same time.  A year or so later I went back for a second summer job between years - Christina was still there, and still interviewing - I remembered to say I liked something apart from my subjects... and then:

'Have you worked for us before?'

'No, not at all.'

'Hmmm.... OK, then...' 

Christina never liked casual workers to come back, for fear they'd know the ropes... And might steal stuff...

Of course several other people did remember me - but no-one told the boss.

Overall, that was a less happy experience.  I got moved around the departments a lot (presumably because I knew a bit about the business), and didn't have a chance to settle anywhere.  It was also a period when the staff were trying to unionise against the firm's wishes;  there were several sackings that summer. 

Once I left I decided not to use the shop if I could avoid it, as all of the disputes had left a rather sour taste.

Still, on Saturday last, when our bus stopped just outside the building, I thought 'What the Hell.  Things must have changed by now...'

And they had.  It's now a smashing bright and airy bookshop, with properly labelled shelves, and the stock is stored according to content, not publisher (always a bugbear in the past).  The cash desks have been swept away (probably long ago) and the staff use regular tills.  The old open ironwork central stairs and lift have been upgraded.  The departments have been completely changed around and reorganised.

Eldest was interested in the IT section so we went to the first floor, to find a very well-stocked Maths, Physics and IT section.

This was very good indeed.  Proper serious books, not afraid to spray around the integral sign. 

(Harummppph).

About an hour later, after browsing a lot and buying very little we decided we needed refreshment and headed for 'Ray's Jazz cafe' on the same floor in the shop.  Very nice.  Good food (cakes in our case) and drink, with background jazz.

And then it hit me - from the shape of the room, the location of the steps in, and the windows.  This was the old Maths and Physics department.  I'd worked for weeks and weeks and weeks in this room.

It was different (no book stacks, just low tables; a smell of filter coffee and toasted cheese), and the same (the same physical space, the light, the view onto Charing Cross Road outside). 

I found it quite an unsettling experience - in some ways I'm still coming to terms with it.

Other memories of Foyles.  The tunnel between the two buildings (before the smaller one was sold off) that was often used by the security staff, to go and surprise shoplifters.  The cameraderie in the Pillars of Hercules (nearest pub) after work.  The sweaty focus on commission.

Sigh.  I'd thought it was all long ago and that the memories had been put safely away.  But clearly not.

Mathematically exacting

Terrific.

Today's crossword, with a proper Maths theme.

Sunday, 24 January 2010

Poem of the Week

Ode to Multiple Universes
Terry Pratchett

I do have worlds enough and time
to spare an hour to find a rhyme
to take a week to pen an article
a day to find a rhyme for 'particle'.
In many worlds my time is free
to spend ten minutes over tea
And steal the time from some far moon
so words can take all afternoon,
Away beyond the speed of light
I'll write a novel in one night.
Aeons beckon, if I want 'em......

... but I can't have em', 'cos of Quantum.