search results matching tag: spiral

» channel: learn

go advanced with your query
Search took 0.000 seconds

    Videos (170)     Sift Talk (9)     Blogs (11)     Comments (411)   

Low wages & high unemployment paralyze the global economy

2009 Norwegian spiral anomaly

2009 Norwegian spiral anomaly

14 BILLION YEARS OF EVOLUTION IN ONE MINUTE

shagen454 says...

Boner: It is still confusing...

Astrophysicists have created the most realistic computer simulation of the universe's evolution to date, tracking activity from the Big Bang to now -- a time span of around 14 billion years -- in high resolution.

Created by a team at the Harvard-Smithsonian Centre for Astrophysics (CfA) in collaboration with researchers at the Heidelberg Institute for Theoretical Studies (HITS), the Arepo software provides detailed imagery of different galaxies in the local universe using a technique known as "moving mesh".

Unlike previous model simulators, such as the Gadget code, Arepo's hydrodynamic model replicates the gaseous formations following the Big Bang by using a virtual, flexible grid that has the capacity to move to match the motions of the gas, stars, dark matter and dark energy that make up space -- it's like a virtual model of the cosmic web, able to bend and flex to support the matter and celestial bodies that make up the universe. Old simulators instead used a more regimented, fixed, cubic grid.

"We took all the advantages of previous codes and removed the disadvantages," explained Volker Springel, the HITS astrophysicist who built the software. Springel, an expert in galaxy formation who helped build the Millennium Simulation to trace the evolution of 10 billion particles, used Harvard's Odyssey supercomputer to run the simulation. Its 1,024 processor cores allowed the team to compress 14 billion years worth of cosmic history in the space of a few months.

The results are spiral galaxies like the Milky Way and Andromeda that actually look like spiral galaxies -- not the blurred blobs depicted by previous simulators -- generated from data input that stretches as far back as the afterglow of the Big Bang, thus portraying a dramatic cosmic evolution (see the above video for a sneak peek of that evolution from four billion years after the Big Bang).

"We find that Arepo leads to significantly higher star formation rates for galaxies in massive haloes and to more extended gaseous disks in galaxies, which also feature a thinner and smoother morphology than their Gadget counterparts," the team states in a paper describing the technology.

Though the feat is impressive -- CfA astrophysicist Debora Sijacki compares the high-resolution simulation's improvement over previous models to that of the 24.5-metre aperture Giant Magellan Telescope's improvement over all telescopes -- the team aim to generate simulations of larger areas of the universe. If this is achieved, the team will have created not only the most realistic, but the biggest universe simulation ever.



>> ^BoneRemake:

this video is a waste without addition information.
what am I looking at. spiraling gas' or something.
what is the significance, why did nine people upvote something they probably do not understand.
what part of the universe is this ? why didnt it start at the beginning ?
WHY WHY FUCKING WHY.

14 BILLION YEARS OF EVOLUTION IN ONE MINUTE

BoneRemake says...

this video is a waste without addition information.

what am I looking at. spiraling gas' or something.

what is the significance, why did nine people upvote something they probably do not understand.

what part of the universe is this ? why didnt it start at the beginning ?

WHY WHY FUCKING WHY.

NEVER tell a comedian what they CAN'T say.....

gorillaman says...

Him & Her and Twenty Twelve are recent examples of excellence.

But there is an issue at the BBC that they seem to have forgotten, probably because so many of the executives have become corporate nothingmen, that the whole point of their funding model is they don't have to spend 90% of their budget and air-time on pandering low-brow shit. For every Attenborough documentary there's a Strictly Come Dancing, and for every QI there's, sorry Frankie Boyle fans, a Mock the Week. I could forgive them everything if the most important thing the BBC produces, their world-beating news coverage, weren't in the same spiralling decline.

Robot overlords replacing our dull jobs

jmzero says...

I will be dead, but it scares me to think what jobs the un-educated will be able to do in 50 years.


I don't think it'll take that long before this becomes a much bigger issue.

Right now there's a few important barriers that are holding back a huge flood of automation: driving on public roads, recognizing and handling awkward materials, interfacing in delicate, safe ways with people (and recognizing their subtle cues for motion, etc..). We could see computers solving most of those challenges to acceptable levels in the next 5-10 years.

I think driving will be a big watershed. Once you meet that kind of competence standard reliably - once people put their lives in the hands of automated judgement like this - I think you could see large percentages of jobs go very quickly. I'm not just thinking of unskilled jobs either.

For example, there's no reason a computer couldn't handle a good percentage of optometrist visits right now (with humans only required in odder scenarios). All that's stopping it is a lack of public confidence - but, again, once robots are driving I think people will come to accept them in all sorts of scenarios... and it'll spiral out very quickly.

Things are going to have to change a lot in terms of what we expect people to do all their lives, and what it means to contribute your share to the economy. Once it starts I think it's going to change very quickly.

A Wiener That's Almost Too Pretty to Eat!

probie says...

>> ^artician:

I've always preferred to consume my lips and assholes in spiral-cut form.
(not really. how do you people eat this stuff?)


Nothing wrong with eating lips and assholes. Just as long as she didn't just come from the gym.

A Wiener That's Almost Too Pretty to Eat!

A Wiener That's Almost Too Pretty to Eat!

Titli Kitchen: Beef Stroganoff (حلال)

BoneRemake says...

I had to laugh at myself. I thought this dish was made with egg noodles/spiral pasta(any pasta or rice)
a can of mushroom soup, maybe with some sour cream in it 3/4 cup of water or milk, after frying the beef you would put the cooked pasta and soup for a bit to bring it all up to temperature and that was that.

This dish seems much much more flavourful and nummy.

I do not agree with the wooden cutting board and meat. NO !

Qi - Phil Jupitus- Horizon bit

My Life Online - The Reply Girl Phenomenon

entr0py says...

>> ^GenjiKilpatrick:

That's unfortunate and unfair.
Sure, it might be unappealing. But Youtube incentivizes reply girl behavior because youtube isn't about quality content, it's about turnover and clickthru rates.
It's a pretty good exposé tho, I'd encourage everyone to watch the second half.
It really humanizes alejandra. Gives her depth and reminds us that we're all just little ape people trying to make it thru life.

>> ^entr0py:
I made it half-way through. Great example of just how horrifying the youtube community is. Glad there's an alternative.



I wasn't very clear, I was horrified by the people threatening her, not by the girl who cleverly found a way to make money on youtube. What she does seems mildly irritating but harmless; it's easy not to click on her videos if you don't want to. Harmless unless merely seeing a little thumbnail of cleavage sends you into a rage spiral. But people that sensitive about boobs should really abandon the internet as a lost cause.

Awesome illusion - A static flow of water

Awesome illusion - A static flow of water



Send this Article to a Friend



Separate multiple emails with a comma (,); limit 5 recipients






Your email has been sent successfully!

Manage this Video in Your Playlists

Beggar's Canyon