Alternative conjecture:
Acoustics, Folk Music, Disability, not necessarily at the same time. OHMI trustee.
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Alternative conjecture:
So, they're complex?
The finest response I've seen so far.
I've always been a huge fan of the extensive footnotes in Allan Pierce's "ACOUSTICS" textbook . . . but I've found a new favorite: "Wind Waves" by Blair Kinsman. His writing style is delightfully refreshing for a textbook, but this full-page footnote on the Bernoulli family history is amazing!
That day might not be as far off as it once was...
And, most importantly, colour with a U pronounced thus:
With colour data from here jfly.uni-koeln.de/color/
Shouldn't be too hard to construct, the python code I used is based on this github.com/nesanders/co...
Cividis is a good alternative to thermal maps for SPL etc, but my hope for BuVe is that it retains the 'hot/cold' relation to over/under pressure for those that can perceive it, while being distinct for those who can't, with white for ambient so that the undisturbed fluid looks undisturbed
Thanks, but I'm planning on switching to BuVe for accessibility reasons going forward bsky.app/profile/mcmw...
If he'd grown up in a lighthouse we'd all be using cylindrical coordinates. Igloo? Spherical.
I remember the story about him inventing coordinates after seeing a fly in the corner above his bed but I can't trace where it came from. I thought it was Bell's Men-only Mathematics but it isn't.
This should dispel the scurrilous accusation that Sir Keir Starmer is a cynical vote-chaser who says whatever he thinks voters want to hear, and confirm that he is a man of sincere (albeit repulsive) conviction
Has anyone ever suggested that no one ever wins? I certainly haven't. On the other hand I stand by my point that the distribution of points on the wheels gives a false and misleading impression of the odds of doing so on a given spin, which I think is poor behaviour on Octopus's part
Has anyone ever suggested that no one ever wins? I certainly haven't. On the other hand I stand by my point that the distribution of points on the wheels gives a false and misleading impression of the odds of doing so on a given spin, which I think is poor behaviour on Octopus's part
Could you maybe have a word with your party's leadership about how being a Reform tribute act is bad? Or is your objection to the "cheap" part?
Concern over low birth rates was what the theocracy in Margaret Atwood’s Handmaid’s Tale used to come to power.
Ther ys power yn a union
Happy New Academic Year to everyone who has yet to be made redundant ! The institution will never love you. The RÉF/your huge grant will not save you. Join a union.
is it only asylum seekers our Labour Prime Minister would object to living next to or would the sentiment apply to black and brown people in general? if merely the former, would he like to explain how he knows people he sees, say, in the street, actually are asylum seekers and not citizens?
Yvette, I'm confused.
NE VER MORE MORE MORE Says the raven in my room By my door door door It's symbolic of my gloom Of my loss, of my grief I was in love but bae dropped dead Now this bird's words are brief It just repeats one word I dread (Usually 'I misread this as' replies are an anathema to me but Guy gets a pass)
Hopefully I've got it right this time
Also many years ago some students made an animation of this effect, which we included on a website and CD-ROM (remember them?). Unfortunately they made a mistake which I failed to notice; fortunately the eagle-eyed @drussellpsu.bsky.social spot it in time for us to pull it
Paths, not oaths, obvs
This was pointed out to me many years ago by the great Frank Leppington, I think he even sketched some oaths on his acetate, but it's nice to see the full motion. Water waves do the same thing BTW
But in the subsonic, evanescent case they follow elliptical paths, isn't that cool?
These are fairly standard animations, but what I worked out how to do today, and am feeling unbearably smug about, is to include the path-lines followed by the fluid elements as they vibrate. For the supersonic case they just move back and forth in the direction of propagation
What if the bending wave travels subsonically? Then there's nothing left for a horizontal wavelength and instead the amplitude rapidly diminishes with distance from the wall - the jargon is that it evanesces in that direction
In the case shown above the bending wave is supersonic, i.e. it's travelling faster than the speed of sound in the fluid. Supersonic bending wave motion is much easier to achieve than supersonic ballistic motion - it happens every time you tap a table and hear something, for instance
The vertical component of its speed and wavelength (distance travelled per period) must match the speed and wavelength of the wall's bending wave; the horizontal component is what's left.
The angle at which that radiated wave propagates depends on the speed of the bending wave, relative to the speed of sound in the fluid.
A bending wave travels up the (infinite) wall on the left, and in so doing displaces the adjacent compressible fluid so as to radiate a plane into that (infinite) fluid half-space
Before I switch to the new preferred colourmap, here's a couple of animations I made for a short course I'm teaching on that use bwr for consistency with the rest of the slides (sorry). So, I present a solution of the 'wavy wall' problem in acoustics
I guess Morse & Feshbach's stereoscopic figures don't do much for you 😕
Up against it, under the same conditions is SBVe, where the negative pressure is represented by sky-blue rather than regular blue
Thanks for all your comments, here and elsewhere. BuVe (blue-white-vermillion) seems to be the winner on accessibility so far, so it goes through to the next round, in which the dots are suppressed
It does spoil the Posy Simmonds cartoon of children burying a dead pet hamster and solemnly intoning "and to the father, and to the son, and into the hole he goes"
good mornin #sInGeRsOnGwRiTeR #cOuNtRy #OrGiNaL #folk #song
Went to an Afghan pop up restaurant last night- the food was all cooked by Afghan refugees who had settled in my town Amazing food, lovely people, a great night. Thank you Oh, and fuck you Fartage
"Made me understand that, truly, they *didn't* start the fire"
Bravo!
Now published! For anyone with an interest in solitary waves, steam carriages, canals, the British Association for the Advancement of Science, the contest for the Chair of Mathematics at the University of Edinburgh in 1838, or late-Georgian shenanigans generally: www.tandfonline.com/doi/full/10....
And the acoustician in me can't help pointing out the unphysical tangential fluid motion at the boundary; in a real (viscous, conducting) fluid even the hardest of hard walls would slightly attenuate oblique waves due to the acoustic boundary layer
Somehow missed the word 'accessible' from the top of the thread - I'm an idiot
Ah well. If he does get ill I hope he seeks and follows the advice of his health secretary, unrepentant Child-killer though he might be
Concluding with a rousing chorus of Down at the Old Bull and Bush (yes, I know it's not the same BH)
Thanks - if you don't mind me asking, how's your colour vision? I'm trying to find the one that most people can extract the necessary information from, which might not be the most natural-looking one
And SBOr, ibid
BuVe from the same set (which is based on the Okade & Ito colour-set)
Late entry: BurP from Nathan Sanders CBcm
What I'm hoping to achieve is 1: distinction between the stripe with closer-spaced dots and the one with further-spaced dots (i.e. pressure varying with density) and 2: increased intensity of both near the right-hand boundary (pressure-doubling on reflection from a hard wall)
trump booked himself a remote cabin with no devices and is going to have a proper go at middlemarch
Lastly, for now, here's broc from the same collection
And here's vik from F Crameri's scientific-colour-maps
Next is the shifted version of the twilight map, which is grey, rather than white at the centre
Here's pyplot's seismic, which is more intense but I'm not sure that makes it more accessible
Testing colour-maps for acoustic-wave visualisations; grateful for any feedback anyone has First up is pyplot's bwr, which I've been using so far, but isn't great
The reaction of fans to Hangman Page overcoming trauma and alienation via solidarity shows that what hundreds of thousands of fans and people worldwide crave is not just success, but connection and togetherness. Read Tom Williams on the politics of wrestling.
Tweaked one
Do any of you own a steam cleaner and have recommendations or warnings?
they’ll just move him to a different parish and he’ll do it again
You know, I'm sure, that description was a bowdlerization of the original "couldn't fart and chew gum at the same time"
Pakamacman #BritishVideoGames
Swanwick the hedgehog #BritishVideoGames
Just putting this here
New thermo exam question just dropped
From this week’s Beano.
"It's really cool when the academic consensus on a topic changes. Unless it's those woke humanities people, then it's just stupid. Agenda, what agenda?"
Apparently it's OK for the consensus to change in other disciplines
I'm a solicitor. Too many people make the mistake of not recording anything during redundancy procedures. Many redundancies do not follow the correct legal procedures, but unless you're recording everything you have no way to prove it in a tribunal. HR are not your friends.
Possibly the members of the pension funds invested in them, though that might be costed in by now
some of you need to make like travis kelce and engage with a tailor swiftly
Passing up an open goal to attack Farage on
Queen Elizabeth the second visited Russia this week, becoming the first English monarch to set foot in the Soviet Union. The visit, which will last for two weeks, is expected to have absolutely no effect on anything whatsoever.
It's Black Sabbath country I guess 🎶gammons gather in their masses 🎶 smaller than most evening classes
I have a pet theory (not research-based) that, partly due to historical currents from the Enlightenment onwards, and partly due to active choice on the part of Scots, Scotland has a qualitatively different underlying intellectual and political culture to England. This is, I think, an example of it.
Thought that I was a higher-rate taxpayer because of my relentless career progression, actually it's mostly inflation
This was always the killer argument against suction-induced laminar flow: it's no good burning less fuel on most flights if you can't guarantee the saving enough to reduce take-off fuel load. Doesn't apply to electric planes, of course
Me neither, though I cop to watching TV via her prime subscription. I wonder if any of the sellers have their own sites as well as their A-shop?
Update: never actually used them but various Am*z*n sellers have them, I'm told
I think herself does, I'll ask when I get a chance
It is fair to say I've never heard this argument used in the UK to query whether 17 year-olds should take decisions that will result in enormous loans to fund higher education that most will never pay off.
But eventually there were and now I am outtahere! Thank you to everyone at QA Hospital Portsmouth who looked after me
www.reddit.com/r/transgende... Guess what? The story about the trans M&S employee and the bra fitting is a pack of lies and distortions. Want to know what really happened and how colleagues stood up for her? Read her own account here.
Interesting, it's certainly not a silver bullet. I've pondered doing formative mastery and then summative standard. But as you say, it's a lot of work, and if they don't engage with formative assessments anyway that's unlikely to change
Or you could use the membership of the student's institution in a literal self-chosen elite that scores well on non-education metrics as proxy for that individual student's ability. That's certainly a choice you could make
I keep toying with implementing it. It doesn't fit easily into existing uni regs for summative assessments, and the usual suspects (IM, presumably) doubtless loathe the fact that it doesn't usually create an ordered best-to-worst list
There's a whole Mastery Grading movement that's worth looking into
J H Prynne said that candidates for a PhD (or was it professorshiplin English should be given a passage to copy out by hand and those who made no errors should pass
I was saying " "=""> in the world" loooong before him
HowTheReichGetsIn
Glad to hear it but I'll be screenshotting this post just in case, against all the odds, it becomes applicable elsewhere 😁
Strange how sanguine politicians across the spectrum appear to be about torpedoing "our brave boys"' prospects of recruiting local translators etc in future conflicts
Guess it's already started
The BBC might just as well run stories headlined "Woman says she was abducted by aliens."
As so often, unis will grab the rope on the hot-air balloon and keep hold until it's gone high enough that letting go is no longer an option
(which it doesn't have a great track record at, obvs) I suspect institutions will soon buy licenses for its students and staff to have unlimited access to the provider's AI model And, just like academic publication subscriptions, the terms will start good and get worse and worse
