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
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.
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?
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.
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?
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?
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"
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
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.
@@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)
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.
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?
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.
A.I. tech could fix the audio fairly easily - removing all the extra sounds. RU-vid will probably have a one click option to fix the audio within a year.👍
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?
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.
Amazing technical solutions were presented, but fixing the annoying mouth clicks captured on microphones? Guess we'll get quantum gravity solved before that...
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.
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!!!!
@@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.
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
@@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.
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
