In heaven everything is fine.
Thanks you David to have shared with us your art life.
Readit NewsRichard Feynman reports in his biography on his own experiments with lucid dreaming. He found sleep to not be restful enough anymore, found it impossible to switch the lucid part of dreaming off and eventually had a negative experience that caused him to stop.
That's funny, I stopped lucid dreaming, exactly for the same reasons : I waked up not rested and stressed, because often I had false awakening happening in series.
I frequently have lucid dreams, in that I'm entirely aware of that fact that I'm dreaming while in the dream.
What I find interesting, however, is that if I have a dream I forgot to study for my test, or I'm naked at school because I left my clothes somewhere else, or the school play starts tonight and I haven't memorized a single line... the fact that I know I'm dreaming doesn't help at all.
Because the problem is that, while lucid dreaming, I have no access to any real-life knowledge or memories. I figure that I'm having the dream because I actually am in school in real life, with an exam I forgot about in the morning. I simply have no access to the fact that I left school many years ago. And if there's a monster behind the door in my dream, it seems entirely plausible in my dream that that's simply because there are monsters in the real world too.
And quite often my dreams are related to real-life situations that happened yesterday or are happening tomorrow or this week -- so it's not like I can try to convince myself of some "rule" that dream anxieties are never anything to worry about.
So my whole anxious lucid dream I'm just thinking, "boy I really hope that I'm not actually in a play that opens tomorrow night..." And then I wake up and it is suddenly crystal-clear that I haven't been in a high school play in decades.
But during my lucid dream, there's absolutely no way of knowing. Curious if this is universal or if other people who lucid dream do always know the details of their actual true reality -- their age, what city and home they live in, current job, etc.
When I have lucid dream, I know that i'm sleeping in my bed (street location, city) and which day of week it is. So I have access to real life knowledge.
So I believe there is different level of lucidity, depending on each individuals.
ElDji commented on EU Council to Vote on Chat Scanning Proposal on Thursday patrick-breyer.de/en/post... · Posted by u/tdsone3
Regional development, common agricultural policy, European social fund... There are many things that could be considered a bit socialist. All the directives regulating business, competition regulation too... EU is not really classical liberal or nationalist.
and considering the examples you cite, that's obviously a good thing, despite the fact that for most americans 'socialism' aims to be a scarecrow word.
ElDji commented on A canonical Hamiltonian formulation of the Navier–Stokes problem cambridge.org/core/journa... · Posted by u/Anon84
I have created a resource for the purpose of making Hamilton's stationary action transparent.
It is possible to go in all forward steps from F=ma to Hamilton's stationary action; that is what I present.
The path from F=ma to Hamilton's stationary action consists of two stages: (1) Derivation of the work-energy theorem from F=ma (2) Demonstration: when the conditions are such that the work-energy theorem holds good then Hamilton's stationary action will hold good also.
I recommend that you first absorb the presentation of the subset of Calculus of Variations that is applied in physics: http://cleonis.nl/physics/phys256/calculus_variations.php
Discussion of Hamilton's stationary action: http://cleonis.nl/physics/phys256/energy_position_equation.p...
These presentations are illustrated with interactive diagrams. Each diagram has one or more sliders for manipulation of the contents of the diagram. That way a single diagram can offer a range of cases/possibilities.
About my approach: I think of Hamilton's stationary action as an engine with moving parts. To show how an engine works: construct a model out of translucent plastic, so that the student can see all the way inside, and see how all of the moving parts interconnect. My presentation is in that spirit.
Thank you.
ElDji commented on A canonical Hamiltonian formulation of the Navier–Stokes problem cambridge.org/core/journa... · Posted by u/Anon84
Thank you! The Lagrangian as projection of energy-momentum actually makes sense, unlike the "let's just subtract potential from kinetic. No reason, it just works" story. I'd been idly wondering that for a while (and this is as someone with a physics degree, though in astro, which is a good bit more applied).
This is the exact point that confused me a lot (and still confuses me) when I tried to read the "The Theoretical Minimum: What You Need to Know to Start Doing Physics" : "Hey, let's just fix/define the lagrangian as T - V and you'll see that after some magical math stuff in the following chapter, we'll find back newtonian equations. Trust me for now".
If anyone has a reference/book/paper that allows you to learn this concept more intuitively, I'd be grateful.
My setup :
- servers and laptops (laptops : except /home): restic to local minio instance + rclone to B2 storage
- /home of laptops : kopia to b2 storage
ElDji commented on Earth may see its all-time hottest temperature this weekend ktla.com/news/california/... · Posted by u/LinuxBender
all-time hottest temperature SO FAR
doh !
A little OT but strongly related: in France you can go to prison if you refuse to give your phone's password to the police (nothing like a "free country", I guess).
Is there a way to set up a phone so that typing a "special" password puts the phone in an alternate state with different apps and content, etc. (and possibly erase the regular content)?
You simply comply and give your phone PIN that somehow doesn’t work.
Compared to what's happening now, it's totally frightening.