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JoeSchmuckatelli
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magnemoe

magnemoe

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On 7/20/2023 at 7:12 AM, steve9728 said:

An electromagnetic ejection microgravity experimental setup. Original link: https://weibo.com/7796311117/NaC9rgnsX

"In terms of experimental efficiency, the traditional drop tower can only do 2-3 experiments per day on average, and the parabolic aircraft can fly more than 30 trips each time, but the experimental preparation cycle is about 2-3 months. This device can achieve a frequency of hundreds of experiments per day, with a preparation time of 1-2 days, which improves the efficiency of scientific experiments. In terms of the strength requirements of the experimental load, the traditional drop tower in the landing recovery phase, the test module, and the experimental load to withstand the impact of about 20G, largely limiting the use of conventional scientific instruments. In this device, the experimental module subjected to the electromagnetic driving force is controlled throughout the whole process, whether it is microgravity, lunar gravity, or Martian gravity simulation experiments. The experimental module's recovery acceleration can be controlled at about 3G - so conventional scientific instruments can be used for experiments. In terms of operating costs, the device adopts energy storage and electromagnetic drive technology, and only consumes electric energy for its operation, with a single experiment consuming only about 1 kWh of electric energy, which is low in operating costs and convenient for carrying out large-scale scientific experiments."

2-3 experiments per day by traditional drop tower before... wait did you guys send someone to bring the stuff to climb up the tower?

If I understand it correctly its an drop tower but tower is not in vacuum they use linear accelerators to  compensate for drag going up and down who sounds cheaper today than an very long vacuum chamber. 

And it brings my express elevator closer to reality, 0 g for half the travel 2 g for the rest, so much time saves and much more fun. 

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Spaceception

Spaceception

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Possible room(ish) temperature ambient pressure super conductor discovered. It hasn't been peer reviewed yet, but it can function at >400K (127C), so not quite room temperature.

https://arxiv.org/ftp/arxiv/papers/2307/2307.12008.pdf

I'll be honest, skimming through the paper, I can't find what the actual pressures were.

Edited by Spaceception
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darthgently

darthgently

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56 minutes ago, Spaceception said:

Possible room(ish) temperature ambient pressure super conductor discovered. It hasn't been peer reviewed yet, but it can function at >400K (127C), so not quite room temperature.

https://arxiv.org/ftp/arxiv/papers/2307/2307.12008.pdf

I'll be honest, skimming through the paper, I can't find what the actual pressures were.

I find the 400K alarming.  Is that a typo?  Most "room temperature" superconductors operate at temps far lower, not higher, than the temperature of a typical room not in an igloo in winter in a blizzard, much less verging on sous vide cooking range.

Just skimmed and not a typo.  Strange they wouldn't mention pressures involved.  Replication or it didn't happen.  Sketchy room temp superconductor claims are quite trendy.

Ok.  I read more deeply.  Ambient pressures generally, but they appear to be saying that pressures in the material increase internally in use.  Not sure I'm reading that correctly.  Who knows? They may be onto something.  If so, a real game changer.  It would change me from lukewarm on renewables as main energy source to much more enthusiastic as a global superconducting  power grid would overcome solar unreliability short of nuclear winter, massive volcanism, or snowball earth occluding the sky everywhere.  Replication, or not, will be the arbiter

Edited by darthgently
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darthgently

darthgently

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7 hours ago, steve9728 said:

Meanwhile, Sun Yat-sen University found 80K one: https://www.gamingdeputy.com/chinese-scientists-took-the-lead-in-independent-discoverythe-new-high-temperature-superconductor-only-needs-192℃-fast-technology-technology-changes-the-future/

Nature: https://www.nature.com/articles/s41586-023-06408-7

For some reason I found the Nature link more impressive than the "gamingdeputy" link.  Interesting stuff!

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steve9728

steve9728

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2 minutes ago, darthgently said:

For some reason I found the Nature link more impressive than the "gamingdeputy" link.  Interesting stuff!

I have the original Chinese link. But I just realized I just shared so many full Chinese link so I randomly found someone who can put this clearly and objectively…

Edited by steve9728
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JoeSchmuckatelli

JoeSchmuckatelli

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7 hours ago, kerbiloid said:

Voyager-2 is back online

https://www-interfax-ru.translate.goog/world/914226?_x_tr_sl=ru&_x_tr_tl=en&_x_tr_hl=ru&_x_tr_pto=wapp&_x_tr_hist=true

 

28 minutes ago, darthgently said:

Definitely a candidate for the Wall-E Award, if the award existed

Yeah - you can file that under "You had ONE job..." 

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kerbiloid

kerbiloid

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Coal mine... 200 mln year old warships...

Still need a real trireme.

No problem with longship boats or the Mediterranean unireme/monere.
https://www.vikingeskibsmuseet.dk/en/professions/boatyard/experimental-archaeological-research/ship-reconstruction

https://www.vikingeskibsmuseet.dk/en/search?tx_indexedsearch_pi2[action]=search&tx_indexedsearch_pi2[controller]=Search&cHash=d55936cc42d54e315bba3c24832a9c64

What about wooden planks with bronze tools for multistorey ships?

Edited by kerbiloid
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magnemoe

magnemoe

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On 8/3/2023 at 3:21 PM, kerbiloid said:

Coal mine... 200 mln year old warships...

Still need a real trireme.

No problem with longship boats or the Mediterranean unireme/monere.
https://www.vikingeskibsmuseet.dk/en/professions/boatyard/experimental-archaeological-research/ship-reconstruction

https://www.vikingeskibsmuseet.dk/en/search?tx_indexedsearch_pi2[action]=search&tx_indexedsearch_pi2[controller]=Search&cHash=d55936cc42d54e315bba3c24832a9c64

What about wooden planks with bronze tools for multistorey ships?

Was drinking beer in London 30 years ago at the Themes  then an trireme passed the London bridge. Two minutes earlier I heard the civilization 1 drums for an civilization has fallen. So I said Roman empire conqueror the British, the other in the group looked at me weirdly but they was also interested in the trireme. 

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JoeSchmuckatelli

JoeSchmuckatelli

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Supercapacitor... Cement? 

Quote

Electrified Cement' Could Turn The Foundations of Buildings Into Giant Batteries

https://www.sciencealert.com/electrified-cement-could-turn-the-foundations-of-buildings-into-giant-batteries

*Right now, these cement capacitors are relatively small, with enough power to light up a few LED lightbulbs. The materials used are cheap and abundant though, and in theory the process should be able to scale up relatively well.

 

Next, the team wants to make one of these devices that's about the size of a car battery.

 

A house with a foundation made of the supercapacitor cement could store enough energy to power that house for a day, the researchers suggest – and the energy could be produced through renewable sources such as solar or wind."

 

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DDE

DDE

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6 hours ago, JoeSchmuckatelli said:

Supercapacitor... Cement? 

https://www.sciencealert.com/electrified-cement-could-turn-the-foundations-of-buildings-into-giant-batteries

*Right now, these cement capacitors are relatively small, with enough power to light up a few LED lightbulbs. The materials used are cheap and abundant though, and in theory the process should be able to scale up relatively well.

Next, the team wants to make one of these devices that's about the size of a car battery.

A house with a foundation made of the supercapacitor cement could store enough energy to power that house for a day, the researchers suggest – and the energy could be produced through renewable sources such as solar or wind."

Those guys are really barking up at all the wrong trees. Capacitors are ill-suited for slowly releasing energy, and... wireless personal trolleycars?

Anyway, much easier to add a mechanical accumulator that goes up and down, and is made of the same concrete.

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AckSed

AckSed

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In 'artificial gravity experiments I didn't know were being run', there's a mini centrifuge for lab animals aboard the ISS, and they have found that Lunar gravity prevents skeletal muscle dystrophy in mice, but doesn't stop the muscle fibres changing type:

https://www.nature.com/articles/s42003-023-04769-3

Edited by AckSed
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JoeSchmuckatelli

JoeSchmuckatelli

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7 hours ago, AckSed said:

In 'artificial gravity experiments I didn't know were being run', there's a mini centrifuge for lab animals aboard the ISS, and they have found that Lunar gravity prevents skeletal muscle dystrophy in mice, but doesn't stop the muscle fibres changing type:

https://www.nature.com/articles/s42003-023-04769-3

That is interesting.  Although, with a permanent lunar base they could do something interesting with a very large ground based horizontal centrifuge and give people a couple of hours of 1g.

IIRC a 225 foot radius 'room' would only need to spin at 2 rpm. 

Given that would be something like 1.5 to 2 blocks wide, maybe a 'train' of rooms? 

Edited by JoeSchmuckatelli
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magnemoe

magnemoe

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3 hours ago, JoeSchmuckatelli said:

That is interesting.  Although, with a permanent lunar base they could do something interesting with a very large ground based horizontal centrifuge and give people a couple of hours of 1g.

IIRC a 225 foot radius 'room' would only need to spin at 2 rpm. 

Given that would be something like 1.5 to 2 blocks wide, maybe a 'train' of rooms? 

That is one idea, Probably build it as an unit but it would rest on an track at the edge, as its only 2 rpm its no issue enter in the center, far slower than entering an escalator.

But the study indicate that even low gravity help a lot over no gravity. 

Edited by magnemoe
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kerbiloid

kerbiloid

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On 8/8/2023 at 4:53 AM, JoeSchmuckatelli said:

https://www.sciencealert.com/electrified-cement-could-turn-the-foundations-of-buildings-into-giant-batteries

Especially when the building is several hundred meters across, its basement is full of underground tunnels, being filled by carbonate water from the limestone deposit around via the many open holes on top, and has a lot of strange internal structures.

http://www.starforts.com/lippe.html

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darthgently

darthgently

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28 minutes ago, kerbiloid said:

Especially when the building is several hundred meters across, its basement is full of underground tunnels, being filled by carbonate water from the limestone deposit around via the many open holes on top, and has a lot of strange internal structures.

http://www.starforts.com/lippe.html

Nope on the non-SSL link...

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