Very interesting and informative, but I do wish they could come up with a different mic system hate hearing mouth noises.

@BDD201

5 ай бұрын

Maybe they aren't familiar with newer technologies?

@dilipdas5777

5 ай бұрын

​@@BDD201which technology is best? Far field microphone?

@samueld92

5 ай бұрын

This guy just needs to get the spit out of the corners of his mouth. Like, dude.

@DrDeuteron

5 ай бұрын

Faraday be like:😮

@RFC3514

5 ай бұрын

Well, most talking involves mouth noises. Unless you talk out of, well, some other place.

Amazing talk!! Very informative & interesting!!

15:16 - I bet they use that one as the punch clock for their employees. "Ah, Jennings, I see you were 0.00000000014405 seconds late yesterday."

7:40 Not all of the rotational enery that is lost due to tidal friction is turned into heat, another part is put into potential and kinetic energy of the Earth-Moon system, by slightly increasing their distance.

A new definition of time is one the way 🥳🔥🔥🎉💃.

I think the next lecture should be one by a professional sound engineer, on how to prevent unwanted mic noise.

@mariusvanc

5 ай бұрын

And someone who can tell the presenters to quit their lip smacking. And maybe take a sip of water once in a while.

@WhileTrueCode

5 ай бұрын

yup, couldnt get through 40 seconds of the recent "What is a white hole?" video either for the same reason. supposedly eating a green apple beforehand would fix it

33:16 I never heard the nature of the ‘crisis,’ i.e., the exact timing dependency risks. Did Leon Lobo ever specify what the actual costs were, despite his continued dramatization, of loosing timekeeping accuracy? Yes, I can imagine some of them in the most general way, but this is an RI lecture! Maybe I missed it, but it seems like he assumed his audience was already familiar. Anyone else notice?

@Epicurus631

2 ай бұрын

Yeah it was not well explained, the map had too large scale to be relevant for the “crisis”. Also the interception seemed to be solely on the Israeli side and green in the Gaza side. Don’t understand what was his point.

A very interesting subject. Also very interesting is how the title page shows a different man to the presenter of the talk. Was there a related presentation immediately before this one which was presented byx someone else?

@onlyeyeno

5 ай бұрын

I believe that the man on the "title page" is Mr "Leon Lobo"(?), who starts his presentation @33:09. Though I don't think it as impossible that different versions of "title pages" are presented to different viewers, all in the quest to" maximize engagement"

Really exciting talk! It's very interesting to hear about how complex it is to keep time worldwide in sync! But for several years I was wondering: who decided to build the time measurement on the sexagesimal system? Why did one choose to measure the time in 2 x 12 hours, minutes, seconds and so on? I found one hint that in some eastern areas of turkey they still use 12 to count until today (you count with your thumb using the 12 bones of the fingers!) Is there any info or source you can suggest?

@Kargoneth

5 ай бұрын

Babylonian.

@borislab8153

5 ай бұрын

thank you very much. this helps! :) @@Kargoneth

Sir Sanford Fleming, who worked as an engineer for Canadian railways

Berlin is much closer to London than the moon. So if 10^-18 is one atom diameter to the distance to the moon I guess if the distance between those cities "changes" by an atom width then this introduces an uncertainty much higher than 10^-18... Would have been interesting to hear something about how this is addressed.

thin started off kind of boring but the final presenter made it sound so much more interesting and relevant . what a 'time' to be alive 😎

57:00 In order for dopplershifts to be within a fraction 10^-18, the speed must be less than 3×10^-10 m/s. With an atomic mass of 173.04, an Ytterbium ion has a mass of around 2.87•10^-25 kg Boltmann's constant is 1.38•10^-23 J/K, meaning that thermal kinetic energy averages to 0.5 mv^2 = 0.5 × 1.38•10^-23 T (per dimension). Plugging the found mass and maximum speed into this and solving for T gives T

@Amethyst_Friend

4 ай бұрын

Try Physics stack no one’s gonna know that here

Isn't the optical clock the best way to measure the gravitational potential?

@kayakMike1000

5 ай бұрын

What is an optical clock?

@daverz15

5 ай бұрын

@@kayakMike1000 ​An optical clock is the clocking of the frequency of light returned when passed through a particular atom - as opposed to clocking the frequency of the atoms constituent parts (which is an atomic clock)

I have a Casio watch.

Good

It's a shame there wasn't the option to ask questions (or it wasn't recorded) as I would love to have heard the answer on "why" on the last subject: I understand that with optical clocks we can measure time more precise than with the current Cesium based clocks and it was said "thus we need a new definition of the second"; but I didn't hear actually why... That we're able to do it doesn't perse mean that you have to. What is with the current second that requires a new definition other than that it is possible: what new does it allow?

@DrDeuteron

5 ай бұрын

The second is defined in terms of a cesium atom.

@R.o.Ro.

5 ай бұрын

They did explain why. We can measure more parts in a second and measure more interval periods to determine passage of time at smaller intervals which allows us to gauge distances and age of things to a higher degree of accuracy based on these values. For the layman it doesnt matter. For people involved in fields like cosmology, astronomy, spaceflight and other specialised industry, we can calibrate things to better accuracy.

@savage22bolt32

5 ай бұрын

In the description. You have to purchase a membership.

@Robinson8491

5 ай бұрын

Why did we need to change the meter from a physical rod to a lightbeam? Because it is more reliable

@clown134

5 ай бұрын

because line goes up, and people with money need the line to go up to make their money turn into more money...

Why does the metrology community want to introduce a global system to measure time orders of magnitude better? Nothing was said about real world advantages. Doesn't it make resilience orders of magnitude more difficult?

Optical clocks ⏰, where can I get those? 100 times better than the Caesium ones, interesting.

Coordinated Universal Time intones the lonely man's voice from Fort Collins / Boulder.

Someone always whines about the sound it's free live with it

Mean Solar Time really hurt me. 😜

what about one Mississippi

Lumch, obviously!

If you want a fault-tolerant and resiliant system, then you should make a distributed timing infrastructure that anyone can use and participate with. Imagine every willing computer around the world.

@EvoraGT430

4 ай бұрын

13:30 works fine.

⏰

Turns out the Doctor is right: time IS Whibberley wobbly.

No mention of that time is quantum. It actually seems quite messy to try and harmonise clocks at different gravity levels.

@koenth2359

5 ай бұрын

Are you referring to planck time? I'd say since that is of the order of 10^-44 s the 'granularity' of time would not be noticeable

gosh, I have to bail, I cannot cope with the microphone extraneous noise.

Wooo

I brew a cup of tea and prepare myself for a nice armchair science!

A.I. tech could fix the audio fairly easily - removing all the extra sounds. KZread will probably have a one click option to fix the audio within a year.👍

Amazing technical solutions were presented, but fixing the annoying mouth clicks captured on microphones? Guess we'll get quantum gravity solved before that...

@psyboyo

5 ай бұрын

First talk was particularly bad, that gentlemen seemed to be chewing cellophane.

@universeisundernoobligatio3283

5 ай бұрын

Maybe listen to what is said rather then how it is said.

wow, it's like listening to someone archaic trying to defend a concept that doesn't exist. a rock spinning time piece. Timelessness to emergence of time.

Kahnemann’s Focusing Illusion - when a top time scientist wastes their career on developing microsecond time stamps for stock markets that should instead be legislated to minimum hour-length timestamps. Markets don’t need gambling-enabling, they need simplified, understandable, regulation by governments.

Time isn't relative anyway😅

Less a scientific talk, more a long advert for NPL's expensive time service for financial markets, with the usual scare stories about GNSS outages

It's not really. It is a completely created dependency.

The speaker really needed to have a glass of water and maybe move his mic further away or pass the audio through a low pass filter. I can't listen to this because of all the clicking and clacking, it was driving my insane.

@beeble2003

5 ай бұрын

It's a mic problem. Same with most other RI talks, which rules out anything to do with the specific speaker.

Accurate time is used for tax purposes only. Look the clock moved, time to raise taxes.

The organizers, probably: Ah, yes, let's give the good michropones with good mouth noise filtering to the boring talks, and the rubbish microphones with every possible sound the internals of a mouth can make amplified, to the actual interesting talks. To even things out, you know

The NOW is now TIMING.

I was super interested to watch this but I can't handle the lip smacking mouth sounds.

Atomic clock need for encryption that can't be cracked so easy.

Summary: TIME IS MONEY or at least the manipulation thereof.

That mouth noise was nauseating, can't get past even one minute...

If they redefine the second, then that will change the definition of the meter! What a mess! I am switching back to inches and feet.

@alanmon2690

5 ай бұрын

Unfortunately, the inch is now defined as being exactly 25.4 millimetres. It got metricated around 1960.

@donc-m4900

5 ай бұрын

Nothing better than the classics.😅

@RFC3514

5 ай бұрын

Changing the _definition_ and changing the _value_ are two different things. Also, inches and feet are actually defined as a submultiple of (you guessed it) the metre, so you'd still have exactly the same (non) problem. I say go back to Egyptian cubits or Indian yojana.

@clown134

5 ай бұрын

americans just love feet, what can i say

finance sector booooo. bunch of rich people making money from having money

free palestine

Pleaaaaaase... We appreciate you, Royal Institute. However, get your MIC straight. We want to listen to Input of Knowledge and not to Saliva and Schmatzen due to improper Audio-Settings. We've noticed this for almost a year now!!!!

@beeble2003

5 ай бұрын

Yeah, there's far too much mouth-noise in these talks. It's really distracting.

@universeisundernoobligatio3283

5 ай бұрын

Maybe listen to what is said rather then how it is said.

@beeble2003

5 ай бұрын

@@universeisundernoobligatio3283 Some people are sufficiently grossed out by things like this that they can't just ignore it. Emotional reactions like that aren't a conscious decision and telling people to just get over it really doesn't help.

@universeisundernoobligatio3283

5 ай бұрын

@@beeble2003 Some people are such butter cups, how did they ever live through early telephone, radio and TV audio.

his mouth smacking really erks th out of me. Drink some water before you give a lecture

@beeble2003

5 ай бұрын

It's the microphone. The same thing happens with most other RI talks.

@SuperBongface

5 ай бұрын

@@beeble2003 So you're telling me that the RI can't afford better microphones?

@SuperBongface

5 ай бұрын

@@beeble2003 RODE ftw

@beeble2003

5 ай бұрын

@@SuperBongface I'm telling you that the audio of RI lectures consistently includes intrusive mouth noises, regardless of who's speaking. It might not literally be the microphone, but it's the audio set-up in general. No other channel has this problem.

So the reason accurate time is important is so some rich mucky muck can play money games without bringing the money markets to their knees.... not much else. Knowing where the ship is right now is nice though. I can't really think of a another reason knowing time better than 2 or 3 seconds matters Most people still respond with times like "half past" or "a quarter to" anyway. The main purpose of metric seems to be the dehumanization of units. Like we had 100mm of rain, whats wrong with 4inchs or even 10cm. even computers don't think in 10s. We can send people to the moon with only 3 significant digits, I'm less impressed than some. When the sun comes up, it is still time to get up. Whatever UTC might say.

Let’s see if we can get through one talk without leftist talking points…or any political points for that matter.

@DavidRDavidRoss

5 ай бұрын

Cry harder fascist. 🤡

@asdfasdfasdfasdfzzzz

5 ай бұрын

Blee blee blee blah, there are more important things in life dawg

@R.o.Ro.

5 ай бұрын

Like what?

@chinmayoak4398

5 ай бұрын

What is not leftist is of the right and vis-a-vis. No political point is also being political in some way. My point - take the facts, decide on your opinion

@mcdermottpa

5 ай бұрын

That is difficult given that facts have a well known leftist bias.

so dull