Hacker News Board Hacker News, browsed like a classic message board
Live data from Hacker News

Technical milestone reached: global earth system simulations with 1.2 km resoln

mpimet.mpg.de

Post reply on HN
Print view View original

91–100 of 105 posts

Re: Technical milestone reached: global earth system simulations with 1.2 km resoln

#91

Post by adgjlsfhk1 »

Maursault wrote: post #58
adgjlsfhk1 wrote: post #48

Earlier quoted context omitted.

there's a very good physical argument that this is impossible. if you want to store 1 bit per femptometer simulated, at current computer sizes, we are taking about a computer billions the size of the earth. even if you use 1 atom per bit, your computer will be almost as big as the earth. such a computer will collapse under it's own gravity.

> at current computer sizes This. No, not at all at current computer sizes, but at future computer sizes. This is the same mistake someone in the 1970's might make about billions having a smartphone today (supercomputer by their standards). Consider how everything at current computer sizes is effectively two dimensional, even stacked processors are still fundamentally 2D designs. There is still a lot of computing adv…

do the math at 1 atom per bit.

Re: Technical milestone reached: global earth system simulations with 1.2 km resoln

#92

Post by elmomle »

rongopo wrote: post #88
dunefox wrote: post #86

Earlier quoted context omitted.

Well, if that's not hard data!

Please can you specify what do you mean?

I believe the parent was trying to say that the information provided is anecdotal, and that they would prefer hard data. They were doing this in an exasperated tone--the full version of their expression would be some version of "If that isn't hard data, I don't know what is!", and is meant ironically in this context.

Re: Technical milestone reached: global earth system simulations with 1.2 km resoln

#93

Post by adrianN »

Maursault wrote: post #87
adrianN wrote: post #78

Earlier quoted context omitted.

No computer can operate on 2**140 objects in any meaningful way, because no computer can even remember whether it's already done with one of the objects or not. Your example operates on a single object, a number.

Your response is a no true scotsman fallacy while also moving the goalposts, though what you've described is either a single-user single-task operating system, or you are conflating the limitations of current conventional single computer technology, which has already been solved with conventional clusters as well as quantum computing, and probably also with modern GPUs. Parallel computing has existed at least since t…

You apparently didn't even skim the paper I linked.

Re: Technical milestone reached: global earth system simulations with 1.2 km resoln

#94

Post by rongopo »

elmomle wrote: post #92
rongopo wrote: post #88

Earlier quoted context omitted.

Please can you specify what do you mean?

I believe the parent was trying to say that the information provided is anecdotal, and that they would prefer hard data. They were doing this in an exasperated tone--the full version of their expression would be some version of "If that isn't hard data, I don't know what is!", and is meant ironically in this context.

Got it, thanks for the input! To the best of my knowledge there are no published results showing this comparison in quantitative terms

Re: Technical milestone reached: global earth system simulations with 1.2 km resoln

#95

Post by mturmon »

Maursault wrote: post #68
adrianN wrote: post #63

Earlier quoted context omitted.

Maybe read https://arxiv.org/pdf/quant-ph/9908043.pdf before you think about computers operating on 2*140 objects and try to be less aggressive in your comments.

Are numbers not objects? Is scientific notation not a way of expressing numbers that are too large or too small to be conceived or expressed in decimal form? Does a large database keep every object and every bit of data stored in it in RAM? How is it possible a fractal can be rendered in parts of the whole? Even older computers ordinarily can operate on 2^140 objects. user@decadeoldcomputer:~$ echo 2^140 |bc 13937965…

Uh, that’s 140 objects (the number of bits), not 2^140 objects. Rookie numbers.

Re: Technical milestone reached: global earth system simulations with 1.2 km resoln

#96

Post by Etching »

Victerius wrote: post #5

I have only one question. Does this mean that we are getting closer to a cloud-hosted ultimate map for games like Call of Duty and Ace Combat? I want to dogfight over Ohio, land at Offutt to play Warzone in Omaha, then take a MRAP and drive to NY.

Since I can't reply to the RoP thread, you said, "Is this about the brown-skinned male Elf and the brown-skinned and beardless female Dwarf? This horse has been beaten to death and back on YouTube and Reddit, and the consensus is that it's fine and faithful to the texts." This is absolutely ASININE in how in accurate it is. The show is BARELY related to the works it is allegedly based on. And brown people aren't the problem, since Haradrim/Easterlings exist in Tolkien's Legendarium. Where is Celeborn? Why is Isildur around 1500 years before he was born? Why is Durin III Durin IV's father, when the dwarves only allow one person at a time to be named Durin due to their belief that each Durin is a reincarnation of the previous one? Why is Gil-galad able to pardon Galadriel (for killing orcs) when it was the Valar who banned her from Valinor, and she isn't pardoned until three thousand plus years later when she rejects the ring. Why is her motivation to get revenge when in the text her motive is to create her own kingdom to rule (kind of like Satan in Christian theology, which is why she's interesting, since her primary conflict is her own pride versus her own wisdom). Speaking of wisdom, why is she a petulant, hot-headed teenager when she's thousands of years old? Why is she going around hunting orcs when what she was doing on Middle-earth in the Second Age ruling various places and being immersed in Elvish politics (and of particular note, her issues with Celibrimbor and Annatar). Why is she going around swinging her sword like an anime protagonist? She might be tall and athletic, but there is scarcely anything written about her in battle, save for her bringing down the walls of Dol Guldur (which typically is done with magic, or a wrecking crew, not an anime sword). Why is she attempting to swim from Valinor to Middle-earth? Why is she in Númenor when she literally never went there?

There's a LOT more I could ask about her, and that's just one character. This show is fan fiction LOOSELY based on the writings. VERY loosely.

That is all. I'll enjoy my ban now.

Re: Technical milestone reached: global earth system simulations with 1.2 km resoln

#97

Post by TheRealKing »

marshallward wrote: post #80
origin_path wrote: post #79

Earlier quoted context omitted.

They don't use FORTRAN because of efficiency or emissions reductions lol, they use FORTRAN because they always did and the sort of scientists who do modelling rarely see any reason to upgrade their skills or tools. Programming is something scientists tend to study only as far as needed to get results that look right. This is how the most influential COVID model ended up being a 15,000 line student-quality C program w…

Fortran is no longer in ALL CAPS.

When will people learn it..

Re: Technical milestone reached: global earth system simulations with 1.2 km resoln

#98

Post by Maursault »

adrianN wrote: post #93
Maursault wrote: post #87

Earlier quoted context omitted.

Your response is a no true scotsman fallacy while also moving the goalposts, though what you've described is either a single-user single-task operating system, or you are conflating the limitations of current conventional single computer technology, which has already been solved with conventional clusters as well as quantum computing, and probably also with modern GPUs. Parallel computing has existed at least since t…

You apparently didn't even skim the paper I linked.

Your comment here and suggestion before, and that entire comment, is ad hominem: "ur dum! Go read a book! LOL! Stop disagreeing with me, I don't know logic!"

Re: Technical milestone reached: global earth system simulations with 1.2 km resoln

#99

Post by Maursault »

mturmon wrote: post #95
Maursault wrote: post #68

Earlier quoted context omitted.

Are numbers not objects? Is scientific notation not a way of expressing numbers that are too large or too small to be conceived or expressed in decimal form? Does a large database keep every object and every bit of data stored in it in RAM? How is it possible a fractal can be rendered in parts of the whole? Even older computers ordinarily can operate on 2^140 objects. user@decadeoldcomputer:~$ echo 2^140 |bc 13937965…

Uh, that’s 140 objects (the number of bits), not 2^140 objects. Rookie numbers.

No, they are 1393796574908163946345982392040522594123776 numbers.

      1 is a number. 

      2 are two numbers (1 + 1). 

      3 are three numbers (1 + 1 + 1). 

      ------------------------------>

      ∴2^140 are 1393796574908163946345982392040522594123776 numbers.
quod erat demonstrandum

Re: Technical milestone reached: global earth system simulations with 1.2 km resoln

#100

Post by [deleted] »

Maursault wrote: post #99
mturmon wrote: post #95

Earlier quoted context omitted.

Uh, that’s 140 objects (the number of bits), not 2^140 objects. Rookie numbers.

No, they are 1393796574908163946345982392040522594123776 numbers. 1 is a number. 2 are two numbers (1 + 1). 3 are three numbers (1 + 1 + 1). ------------------------------> ∴2^140 are 1393796574908163946345982392040522594123776 numbers. quod erat demonstrandum

[deleted]
Post reply on HN