I am assuming that the 'd' in dx/dy stands for differentiation

Not quite.  Let the value of a property y depend on the value of another property x. Example, the amount of water in a bath (let's call it y litres) depends on the time (let's call it x minutes) for which the water has been running

Calculus is based on the properties of the way in which the value y changes as the value of x changes.  As a rate , this is expressed as:
not: y/x, but: change in y divided by change in x,
and this can be written as: Δy/Δx

But when Δy and Δx approach 0, then
the increment of y / increment of x is written as  dy/dx.

In calculus we need to work this out for small changes in x and y, and the shorthand is to say
the infinitesimal increment of y /the infinitesimal increment of x, and this is expressed as the ratio dy/dx.

That is, in the Differential Calculus, the increment of x and y is very small, theoretically equal to infinitely small, what we call infinitesimal. You can't measure it, but the ratio is real and measurable.

So d is not differentiation per se, but the way of indicating the infinitesimal increment in the value to which it s tagged.

In the example given, dx might be 0.0000001second, and dy 0.000001ml. Not tangible numbers.
But their ratio is 0.6 ltr/minute.

BTW, another shorthand for dy/dx is f'

This is useful where in more complicated maths, you need to write say d/dx.(dy/dx) this can be written f²(y)

...anyone  speaking any language (speaking broadly).

By which I mean that if an emoji is based on a technological item, it would not be understood in  cultures unacquainted with that item. Also, strange though it may seem, there are probably cultures who do not understand the concept of a picture, or of associating a picture with an action or even, thing.

There are some cultures who do not share the same perceptions of colour  as us, and a blue thing might be confused with a red the_same_thing. (Colour blind people, or a print in monochrome)

The bit I clipped comes out of a section on writing - and printing - the Chinese and Japanese languages. Very interesting in itself.

Specially for you, William.

This is clipped from the third instalment of the BBC series  The Secret History of Writing. I got it from BBC iPlayer.
This bit, at  53min56sec, is about stories composed entirely in emoji designed for reading by anyone  speaking any language (speaking broadly).


https://i.postimg.cc/PvMJCqyP/image-2022-03-30-155012.png

179

(6 replies, posted in Art & Literature)

GB, I really wish you hadn't given that link.  One needs a week to explore the lush landscape of the topic website.

Thanks, anyway for a most interesting link result.

In the course of exploring the field, I came across the quoted list. It's a bit long, and slightly off topic - a study of Q can eventually pall after reading  dozens of comments!

From AHA! Jokes:  http://www.AhaJokes.com/

Tips to improve your writing

1. Avoid alliteration. Always.
2. Never use a long word when a diminutive one will do.
3. Employ the vernacular.
4. Eschew ampersands & abbreviations, etc.
5. Parenthetical remarks (however relevant) are unnecessary.
6. Remember to never split an infinitive.
7. Contractions aren't necessary.
8. Foreign words and phrases are not apropos.
9. One should never generalize.
10. Eliminate quotations. As Ralph Waldo Emerson said, "I hate quotations. Tell me what you know."
11. Comparisons are as bad as cliches.
12. Don't be redundant; don't use more words than necessary; it's highly superfluous.
13. Be more or less specific.
14. Understatement is always best.
15. One-word sentences? Eliminate.
16. Analogies in writing are like feathers on a snake.
17. The passive voice is to be avoided.
18. Go around the barn at high noon to avoid colloquialisms.
19. Even if a mixed metaphor sings, it should be derailed.
20. Who needs rhetorical questions?
21. Exaggeration is a billion times worse than understatement.
22. Don't never use a double negation.
23. capitalize every sentence and remember always end it with point
24. Do not put statements in the negative form.
25. Verbs have to agree with their subjects.
26. Proofread carefully to see if you words out.
27. If you reread your work, you can find on rereading a great deal of repetition can be avoided by rereading and editing.
28. A writer must not shift your point of view.
29. And don't start a sentence with a conjunction. (Remember, too, a preposition is a terrible word to end a sentence with.)
30. Don't overuse exclamation marks!!
31. Place pronouns as close as possible, especially in long sentences, as of 10 or more words, to their antecedents.
32. Writing carefully, dangling participles must be avoided.
33. If any word is improper at the end of a sentence, a linking verb is.
34. Take the bull by the hand and avoid mixing metaphors.
35. Avoid trendy locutions that sound flaky.
36. Everyone should be careful to use a singular pronoun with singular nouns in their writing.
37. Always pick on the correct idiom.
38. The adverb always follows the verb.
39. Last but not least, avoid cliches like the plague; They're old hat; seek viable alternatives.

Another video that I found interesting. 
Why Are There 7 Days In a Week?
https://www.youtube.com/watch?v=vpRd52dXHlQ

Do watch it to the end.

I haven't looked into this, but could it be locked for reasons of permissions?

This video discusses the various terms in different languages and cultures, for colours and the relationships between them and their languages.
The surprising pattern behind color names around the world
https://www.youtube.com/watch?v=gMqZR3pqMjg

does it ever get out … ?

If it stays in, and I'm sure most does, where does it go.
Put another way, are the particles coarse enough to lodge in a blood capillary, blocking it?
It could cause a stroke in the brain, or a heart attack in heart muscle.

184

(18 replies, posted in General Discussion)

https://i.postimg.cc/V0B3YCbx/image-2022-03-23-165105.png

185

(7 replies, posted in General Discussion)

Please define basic.

186

(7 replies, posted in General Discussion)

What would you call it then William?

How about IQMean phone?

187

(18 replies, posted in General Discussion)

I feel that  "laconically" is not sufficiently related to "time", or "cautiously" to "prepared", to term it a Tom Swiftly in the classic manner.

I'm racking my brains to think of a good one, and managed this, so far:
He had examined the clock face in detail, he explained minutely. Not a good one, as "minutely" really relates to the "explained".

The farmers wife had cut off the  mouse's tail, as she detailed what happened. H'm, more of a pun....

These next are cribbed direct from the Merriam Webster website

Sometimes the puns are simple:

"Let's gather up the rope," said Tom coyly.

"Welcome to my tomb," said Tom cryptically.

"I can't find the oranges," said Tom fruitlessly.

Sometimes they require a little more thought to get:

"Don't you love sleeping outdoors," Tom said intently.

"Let's trap that sick bird," Tom said illegally.

"I lost my trousers," said Tom expansively.

And some are inspired:

"I just ran over my father," Tom said transparently.

And the all-time best Tom Swifty:

"I just dropped the toothpaste," said Tom crestfallenly.

188

(18 replies, posted in General Discussion)

I got 4. Didn't  know what a Pangram was, or assonance. Didn't think much of the Tom Swiftly, either.

There was a Tom Swiftly craze I think in about 1965.

PS Why does one need to register - did I do it previously? I seem to be able to post without it.

189

(328 replies, posted in General Discussion)

The Duck joke's punchline which had everybody in stitches was either very predictable, or I didn't understand it?

Very old joke, and very predictable. Like all jokes "It's the way you tell 'em."

BTW, the DT TV critic says that they recreated the dyes used in the Bayeux Tapestry, and they are amazing. Going to watch that tonight, and miss Midsomer Murders, our usual fare. Then again, we won't miss it - work that out!

190

(5 replies, posted in PagePlus)

You will find instructions  in the Help file; go to Chart Tool. If you want to get on without reading up too much, go down to Using Charts.

In response to your query, this is the first time I have used Charts in PP. I am used to  drawing charts in Excel, so I find the PP  charts limited in display facilities.  But at least you can adjust colours, lines, and spacing in column charts.

191

(130 replies, posted in General Discussion)

Discovery!

https://i.postimg.cc/nj2qY7s5/image-2022-03-20-142551.png

For a time, there was a glut of stamps from East Germany, heavily overprinted, and frankly (pun intended) worthless. I am sure these were produced especially for sale to novice  collectors  in the West, who paid small sums for giant packets of rubbish. "Every packet contains some high value stamps." Phooey!

BTW, stamp collecting was a hobby of King George 5, so it ought to be OK for lesser mortals. There are cabinets full of his stamps in the British Museum, as I remember.

When I cleared my late father's papers, there were many receipts with old postage stamps, acting as duty stamps (Geo 5 in an era of E2R, but unfortunately, I understood these were not collectable.

Do people remember, or realise, that for years, one had to fix a stamp, usually 2d, on every document like a receipt. Printed receipt form pads had a space for the stamp, and I think you were supposed to overwrite it to prevent reuse. Cheque books were ready printed with a duty 2d stamp, so you had to pay for a cheque book to settle the duty. A book of 25 cheques would have cost you 50d or 4s2p - "four-'nd-tuppence". I can't remember how many cheques a book would have; it might have been 12, costing 2s in duty. nb That's all from memory, subject to error.

193

(0 replies, posted in Mathematics & Science)

Thought these tips might be of interest -I've only looked at the first few - TV Midsomer murders beckon!

https://www.youtube.com/watch?v=OOlwHsitr4k

194

(19 replies, posted in General Discussion)

A note about configuring the shape of "wide aspect ratio" characters to fit around a clock-face. The work described was in PPX9.

I noticed a problem when I generated the disk object I posted earlier.  My purpose was to show the set of glyphs in William's poem disposed around the edge of a disk. Placing them wasn't my problem, although account should be taken of the various subsequent posts on that topic.

My problem, which I didn't solve, was my desire to have the glyphs conform to the  circular path. That means, individual glyphs, which are rather wider than a single normal text character should themselves curve  to fit the path.

The problem originated in that the glyphs I copied were those in William's picture, and were within a graphic. I copied them  using a screen copying app, and was thus holding a vertical rectangle with the glyphs stacked vertically.

Now, it was easy to crop each glyph from the stack, and then I tried to curve each glyph using the distorting tool. This where to snag showed up. Trying to distort just one glyph (remember, one cropped from several) brought up the whole original stack. That might have been OK, if I could have re-cropped each glyph. But they were too close together to separate.

So my comment is that if you try to distort a cropped image, the crop is removed.

I have not investigated any further so far, and I would be grateful if anyone could suggest a remedy. I may just  have ignored a simple process in PPX9.

If I had started with a set of individual glyphs (not linked in a graphic) I believe I should not have had a problem. This note is not about how to get such a set, but to bring to mind the interesting crop/distort effect.

195

(6 replies, posted in General Discussion)

Alfred, I don't disagree with you.

During  WW2,  "double-summertime", two hours adrift, was implemented in the summer, for a period. Then, one hour ("summertime") adrift in the winter led to very dark mornings.

It also meant getting up for work was in the quite early morning, most disagreeable.

British Double Summer Time”
There have been periods in UK history where DST was 2 hours ahead of standard time. This is known as “British Double Summer Time” (BDST), “Double Summer Time,” or “Double British Summer Time.”

During World War II the UK went on an extended DST period from February 25, 1940 to October 7, 1945, effectively adding 1 hour to the time zone (UTC+1). During the DST period in the summer, another hour was added to the time zone (UTC+2).

There was another period of BDST in 1947, which was brought on by severe fuel shortages in the country.

196

(6 replies, posted in General Discussion)

The article states "as a way to create more daylight hours during warmer months"!!!  Doesn't say much for the intelligence of the writer.  More daylight hours comes from the earth's orbit not from moving our clocks.

I think that the ". . . way to create more daylight hours during warmer months" is because people tend to get up according to the clock. It will be darker at breakfast time, but we will eat at the same clock time each day. At the other end of the day it will be lighter, prolonging the evening. So it seems that the daylight is longer even though it isn't.

197

(328 replies, posted in General Discussion)

An American comedian on the Johnny Carson show

Buddy Hackett's Duck Joke Has Everyone Rolling | Carson Tonight Show

https://www.youtube.com/watch?v=aww4HT5g7ig

198

(15 replies, posted in Art & Literature)

This thread has passed into the areas of unicode,  LS sentence  glyphs and detail design and use of specific software.

Can it be guided back into its overall heading areas of Arts and Literature, which may be of greater general interest? Please.

199

(15 replies, posted in Art & Literature)

William, I looked at your "poem in an ellipse" in a link you posted, and thought that the words, in your glyphs, might look nice in a circle like a clock face, or a decorated dinner plate.

I had to process each glyph individually, so I selected just the first few, and made the design I append. A bit naïf as a design, but merely to illustrate my point.
https://i.postimg.cc/ykvkD3x0/image-2022-03-15-112833.png

200

(7 replies, posted in Mathematics & Science)

This video explores the effects of artificial gravity, and some means of achieving it. Real science, not Sci Fi.
https://www.youtube.com/watch?v=nxeMoaxUpWk

And another, well explained simple maths.
https://www.youtube.com/watch?v=aONcg5pcspI