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davieG

Technology, Science and the Environment.

By davieG, in General Chat

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Dahnsouff

Dahnsouff

Posted
Posted

We recently got some house batteries through Sustain/Solar Together plan through the local authority.

Turn on from Monday, arrived at 50% and have about 15kWh capacity.

Work at home and the average cost was about £25-30, now as we are charging the batteries overnight, the weekly cost is looking to be ~£14.

This on Intelligent Octopus Go tariff, so looks like it may well be good choice before long.

 

Maybe useful info for others. :dunno:

  • Like 2
ajthefox

ajthefox

Posted
Posted
On 10/06/2025 at 12:46, leicsmac said:

Make Measles, Diphtheria, Tetanus and Polio Great Again. 

 

 

FB_IMG_1749555871342.jpg

Frightening. I don't even understand what the angle is here.

 

Also, isn't big pharma still y'know pretty, BIG? I know as an industry it isnt exactly altruistic but surely they will have something to say about how this is going. It can't be good for them.

The Bear

The Bear

Posted
Posted
2 hours ago, ajthefox said:

Frightening. I don't even understand what the angle is here.

 

Also, isn't big pharma still y'know pretty, BIG? I know as an industry it isnt exactly altruistic but surely they will have something to say about how this is going. It can't be good for them.

There is no angle, they're just morons who think they know better than actual scientists. 

SpacedX

SpacedX

Posted
Posted
4 minutes ago, leicsmac said:

They're really having trouble scaling up the complexity of the designs, it would seem. 

As Scott Manley points out in this video, I think it's due to the imperative of shedding weight and mass compromising structural integrity. Like he says, and to invoke the old engineer's adage, '

"Any idiot can build a bridge that stands, but it takes an engineer to build a bridge that barely stands."

  • Like 1
Zear0

Zear0

Posted
Posted (edited)
23 minutes ago, SpacedX said:

 

Slight difference of opinion re: the slow mo at the end.  Pressure retaining parts more often than fail in the axial orientation due to the loads with hoop stresses dominated by pressure.  The old joke for undergrads learning about pressure retaining parts is explaining why sausages on a BBQ split length wise down the middle, same thing.

 

If it was radial/axial failure due to pressure stresses that is a worry as that's basic stuff you design out and put massive margins against.  Given I have zero doubt they have designed to code, might be that there was some defect in that joint that failed and propagated down.  Interesting to see what they come out with.  Surely SpaceX haven't had the DOGE treatment?

Edited by Zear0
SpacedX

SpacedX

Posted
Posted
15 minutes ago, Zear0 said:

Given I have zero doubt they have designed to code, might be that there was some defect in that joint that failed and propagated down.

^

reporterpenguin

reporterpenguin

Posted
Posted

A failed nitrogen pressure vessel the likely culprit according to Musk, failing well below design spec. I'm fairly sure they use third party COPV's rather than manufacturing them in house? 

 

It seems fairly clear that this block 2 redesign is cursed. It's very disappointing given the rapid progress they had been making.

leicsmac

leicsmac

Posted
Posted
40 minutes ago, reporterpenguin said:

A failed nitrogen pressure vessel the likely culprit according to Musk, failing well below design spec. I'm fairly sure they use third party COPV's rather than manufacturing them in house? 

 

It seems fairly clear that this block 2 redesign is cursed. It's very disappointing given the rapid progress they had been making.

And it will have a knock on effect for NASA, as well. 

 

Here's hoping they can get back on track soon. 

blabyboy

blabyboy

Posted
Posted
On 18/06/2025 at 19:20, leicsmac said:

https://phys.org/news/2025-06-plastics-threaten-ecosystems-human-health.html

 

Western figures of a particular type....

 

https://phys.org/news/2025-06-tracking-planet-real-china-high.html

 

... and China. 

 

Which, exactly, is the better bet towards guaranteeing the future of the biosphere going into the future?

The first. The second option merely seeks to accurately measure the decline and it will need a global recognition of the facts to do anything, which seems to be a problem for some at present.

 

Stopping plastic is the more important option given it pervasiveness into our bodies as well as the surrounding natural world.

leicsmac

leicsmac

Posted
Posted
8 minutes ago, blabyboy said:

The first. The second option merely seeks to accurately measure the decline and it will need a global recognition of the facts to do anything, which seems to be a problem for some at present.

 

Stopping plastic is the more important option given it pervasiveness into our bodies as well as the surrounding natural world.

I absolutely agree that the recognition and action on this matter needs to be global. However, the first article shows rather clearly that those certain Western figures are about as much use in that regard as a chocolate fireguard. 

Dahnsouff

Dahnsouff

Posted
Posted

Following up on the house batteries install, it is looking well worth it, electricity numbers for this week very good

KWH is very similar to pre batteries, cost is a fraction compared

 

image.thumb.jpeg.9ef0e96ff2b7acff5d9c9d41c816a4fe.jpeg

davieG

davieG

Posted
  • Author
Posted

Noy sure how authentic this is. Things like this never seem to make any sort of news.

 

May be an image of 1 person and text that says "画 A42,000-YEAR-OLDTREEJUS A OLD TREE JUST REVEALED HOW EARTH'S MAGNETIC FIELD COLLAPSE CAUSED GLOBAL CLIMATE CHAOS AND MAY HAVE DRIVEN EARLY HUMANS INTO CAVES RK"

 

🌳 THE TREE THAT WITNESSED EARTH'S MAGNETIC APOCALYPSE: Ancient Kauri Reveals What Happened When Our Planet's Magnetic Shield Collapsed!
Deep in a New Zealand swamp, scientists found the perfectly preserved trunk of an ancient kauri tree that lived for 1,700 years - including through the last time Earth's magnetic poles completely flipped around 42,000 years ago. The tree's rings became a time machine, revealing one of the most dramatic periods in Earth's history when our planet's magnetic shield nearly disappeared entirely.
AMAZING RESULTS:
During what scientists now call the Adams Event, Earth's magnetic field collapsed to just 0-6% of its normal strength for several centuries. With our cosmic radiation shield almost gone, the planet was bombarded with dangerous space radiation. The tree rings show massive spikes in radiocarbon levels as cosmic rays poured through the weakened magnetic field, creating widespread electrical storms and brilliant auroras across the sky.
MORE THAN BEAUTY:
This wasn't just a light show - it was a global crisis. Ice sheets expanded rapidly, weather patterns shifted dramatically, and Australia became a desert. Many large animals in Australia and Tasmania went extinct during this time. Some researchers even think the surge in cosmic radiation may have driven early humans to seek shelter in caves, possibly explaining the sudden appearance of cave art around this period as people spent more time underground.
THE BIGGER VISION:
The kauri tree's rings provide the most detailed record ever of what happens when Earth's magnetic shield fails. Today, scientists worry about what would happen if such an event occurred again. Our satellites would fail, power grids could collapse worldwide, and rapid climate changes could reshape the planet. The tree that stood watch 42,000 years ago is now helping us prepare for future magnetic reversals.
A single tree became Earth's memory keeper during one of the planet's most chaotic chapters! 🌍

 

  • Like 3
SpacedX

SpacedX

Posted
Posted
2 hours ago, davieG said:

Noy sure how authentic this is. Things like this never seem to make any sort of news.

 

May be an image of 1 person and text that says "画 A42,000-YEAR-OLDTREEJUS A OLD TREE JUST REVEALED HOW EARTH'S MAGNETIC FIELD COLLAPSE CAUSED GLOBAL CLIMATE CHAOS AND MAY HAVE DRIVEN EARLY HUMANS INTO CAVES RK"

 

🌳 THE TREE THAT WITNESSED EARTH'S MAGNETIC APOCALYPSE: Ancient Kauri Reveals What Happened When Our Planet's Magnetic Shield Collapsed!
Deep in a New Zealand swamp, scientists found the perfectly preserved trunk of an ancient kauri tree that lived for 1,700 years - including through the last time Earth's magnetic poles completely flipped around 42,000 years ago. The tree's rings became a time machine, revealing one of the most dramatic periods in Earth's history when our planet's magnetic shield nearly disappeared entirely.
AMAZING RESULTS:
During what scientists now call the Adams Event, Earth's magnetic field collapsed to just 0-6% of its normal strength for several centuries. With our cosmic radiation shield almost gone, the planet was bombarded with dangerous space radiation. The tree rings show massive spikes in radiocarbon levels as cosmic rays poured through the weakened magnetic field, creating widespread electrical storms and brilliant auroras across the sky.
MORE THAN BEAUTY:
This wasn't just a light show - it was a global crisis. Ice sheets expanded rapidly, weather patterns shifted dramatically, and Australia became a desert. Many large animals in Australia and Tasmania went extinct during this time. Some researchers even think the surge in cosmic radiation may have driven early humans to seek shelter in caves, possibly explaining the sudden appearance of cave art around this period as people spent more time underground.
THE BIGGER VISION:
The kauri tree's rings provide the most detailed record ever of what happens when Earth's magnetic shield fails. Today, scientists worry about what would happen if such an event occurred again. Our satellites would fail, power grids could collapse worldwide, and rapid climate changes could reshape the planet. The tree that stood watch 42,000 years ago is now helping us prepare for future magnetic reversals.
A single tree became Earth's memory keeper during one of the planet's most chaotic chapters! 🌍

 

The accepted terminology is the 'Laschamp Event' derived from geomagnetic anomalies found in larva flows in France. The name "Adams event" is amusingly derived from Douglas Adams, and "The Hitchhiker's Guide to the Galaxy," - the number "42" being the answer to life, the universe, and everything. The event's timing, was supposedly 42,000 years ago....except it wasn't - it began 41,000 years ago.  There is disagreement on this, but as I understood it the Earth's magnetic field during the 250 year reversal declined to a minimum of 5% of its current strength, and was at about 25% of its current strength when fully reversed. There is no causal link between the Laschamp event and population bottlenecks of many species, and the relatively minor radioisotopic changes during the event, have cast significant doubt concerning its impact on global environmental changes. Looks like this was a hastily assembled and rather misleading meme created for and plucked off social media. 

  • Like 2
  • Thanks 1
The Bear

The Bear

Posted
Posted (edited)

/pedant

 

Technically the ISS is still in the upper atmosphere and therefore in the same inertial frame of reference as the ground. So they're still "with us" as part of the Earth. 

 

/pedant

Edited by The Bear
The Bear

The Bear

Posted
Posted
1 minute ago, leicsmac said:

Clearly we need to get the fvck on with established colonies on the Moon with Mars to follow to solve this one. 

It'll be a truly momentous day when the first human sets foot on another planet. 

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