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AlexTheGreatish

Using 6000 CPU Cores for SCIENCE - HOLY S#!T

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1 hour ago, Egg-Roll said:

True after looking at the concepts of cabin sizes. Also looking at a whitepaper it stated this:

http://www.uschyperloop.com/hyperloop/

https://static1.squarespace.com/static/55806a2be4b025a747db3aef/t/55ba400ae4b029dda67b8d13/1438349523517/Hyperloop+Alpha

I still however would not use it nor trust it for anything but cargo. No idea what TransPod is thinking as well... VIA has a connection to and from Montreal to Toronto (which is hilariously not mentioned in Hyperloops Wikipedia, I wonder why), sure it's going to be "faster" but the cost of building it will push tickets far higher than the cost of a train one due to its preexisting nature.

 

Also it looks like we are finally getting a HSR in Ontario, I think TP want us to use them instead, but no thanks, too many possible issues at least trains have been around for 200+ years, and have been running HSR for 60 of that.

https://www.ontario.ca/page/high-speed-rail

 

For 11 billion I've got no complaints, now if they could create a Hyperloop for 3 Billion instead of the claimed 50% of the cost then I might be interested, but Canada sure does love it's trains 🤣

Yeah the US has what, one passenger train system that only does a small portion of the US at 80mph


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7 hours ago, BuckGup said:

Yeah the US has what, one passenger train system that only does a small portion of the US at 80mph

Yup, and introduced way back in the 60's because the USA wanted everything Japan had, but couldn't bother asking them...

The saddest part is Japan has had HSRs for so long and kept getting better we look like fossils, and we are finally getting them now, or in the US one or 2 more.

 

Apparently France is getting the Hyperloop first next year some point for at least a test run, at which time we will know and see if this is the first real letdown from Mr. Musk.

https://www.engadget.com/2018/10/02/hyperloop-transportation-technologies-first-capsule/

 

12 hours ago, AlexTheGreatish said:

-Don't listen to Thunderf00t

Ok don't listen to him, listen to the white paper then :P

 

Correct me if I'm wrong but isn't 99 Pa 0.099 kPa, when you and I are used to 100 kPa +-? Right now it's 99.4 kPa in Toronto, according to the whitepaper the pressure in the tube would be exactly 1000 times less than that. Oh we are also warmer than you guys right now 😂.

 

The real question is what will really happen when one of those tubes gets compromised like say a bullet? Remember these things are thin compared to the ones shown in the video plus they don't get concrete as a additional safety feature. All it takes is one tiny hole to cause a catastrophic failure, the concept works on paper, but not in real life it can't, simply because of people. Remove the human factor then sure it'll work. Also lets see your internal organs after you are forced to stop from 700km/h to 0 because of a breach, because you will likely die from it, if not if Thunderf00t is correct about the air rushing in at the near speed of sound which makes sense since it is trying to fill a void the shear pressure that air is coming towards you even at a complete stop would be far far worst than this:

 

 

 

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Posted (edited)

Ok... so on the work ability of the hyperloop.  

 

One cannot say this is impossible as no law of physics says that transporting people inside a pressurized vehicle, enclosed in a evacuated tube will not work.   The question is more one of practicality.  

 

The practical power of the good old railroads (and roads for that matter) is that the infrastructure once built does not itself need to be powered in any way.     All infrastructure needs to be maintained but good old railroads and roads only need this expenditure once in a great while.   

 

While hyperloop has the same issues as maglev trains.  Depending on how they are designed the tracks themselves need to be energized.  Otherwise the electromagnets fail and the trains cannot move.  Hyperloop has the same issue.  A serious power failure in enough vaccum pumps at at best you have people trapped in tubes with a limited supply of air (With a life support system it could be days or months but that adds to the expense quite a bit.  Imagine a module of the ISS enclosed in the tube with seats fixed inside it and you get the idea.)  This is all doable, but it will be very expensive compared to trains, there will be a learning curve as we learn from mistakes, just as with jet travel some of the early users will die (see the DeHavilade comets design flaws*)  

 

One could object as all major cities have an electrified rapid transit system such as the L or the Subway.  Notice those things are very local 

 

If I am skeptical it is in part because Chicago was a center of hyperloop hype not that long ago.  ("How Musk Hyperloop Became Just a Loop In Chicago") 

 

TLDR: Hyperloop as evacuated tubes is probably too impractical for long haul trips or shipping.   Local rapid transit via some sort of tubes will have to wait for the year 3000. 

 



*1000 pardons if posting to a non Linus media video is forbidden.  

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Edited by Uttamattamakin
Adding hopefully funny gif.
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On 12/30/2018 at 2:25 PM, AlexTheGreatish said:

We tour LIGO Hanford's gravitational waves observatory!

 

Buy Gravitational Waves Books
On Amazon: http://geni.us/XnkM
On Newegg: http://geni.us/vzZag

 

Registered just for this.

 

This is great surprising content! Did LIGO reach out to you or did you contacted them out of interest? The video doesn't come across as a command/order.

 

Anyhow, great content well explained.

 

PS: Your squeezing schematics shows amplitude squeezing, not phase squeezing. Phase squeezing would have the ellipse rotated 90° around its center compared to that. They do use phase squeezing though, as per their 2013 Nature Photonics paper (http://www.nature.com/doifinder/10.1038/nphoton.2013.177). It's just that the graphic doesn't match it.

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Posted · Original PosterOP
3 hours ago, QuantumCakeIsALie said:

This is great surprising content! Did LIGO reach out to you or did you contacted them out of interest? The video doesn't come across as a command/order.

I contacted them out of interest.  I found out they were roughly in driving distance and then contacted them and set-up a trip.  They're really awesome about doing tours and having good learning resources.

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9 hours ago, AlexTheGreatish said:

I contacted them out of interest.  I found out they were roughly in driving distance and then contacted them and set-up a trip.  They're really awesome about doing tours and having good learning resources.

That's a very great initiative, kudos. It's refreshing to see genuine interest in physics from a channel like yours that reaches a wide audience that's not necessarily actively looking for it. Great outreach!

 

So when do you guys start a Linus Science Tips Channel? ;)

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3 hours ago, AlexTheGreatish said:

Lol probably never, but hopefully more videos like this one will be hitting LTT on occasion 

TRIUMF? 

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On 1/4/2019 at 2:34 PM, AlexTheGreatish said:

Yeah I'd be very down to do that.  Also planning on doing CHIME this spring.

If you have any problems contacting someone at TRIUMF, there are a few grad students from there who are on the UBC subreddit quite frequently offering tours.  They might be able to help.

 

If you can get Gary Hinshaw from the CHIME team to talk, he's fantastic and very enthusiastic. 

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Posted · Original PosterOP
6 hours ago, idmb said:

If you have any problems contacting someone at TRIUMF, there are a few grad students from there who are on the UBC subreddit quite frequently offering tours.  They might be able to help.

 

If you can get Gary Hinshaw from the CHIME team to talk, he's fantastic and very enthusiastic. 

Got a contact and currently arranging a potential video!

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