Seems like it would be less work to just make a robot with legs that can walk up/down stairs. That also makes it easier to navigate other obstacles easier.
The effect of space operation is particularly of interest in specifying the mission computer for a manned Mars mission
Except that in LEO, the computers are protected by the Earth's magnetic field. Sending COTS parts to Mars would be a bad idea, especially if the crew's life depends on it.
Running tests on the ISS isn't going to be very useful for when you want to go to Mars. Cosmic radiation gets much worse, and when a solar flare comes your way, there's no place to hide.
we measured the total mercury concentration in vegetables and grain crops collected from farms located near two coal-fired power plants. We found that 79% of vegetable samples and 67% of grain samples exceeded the PTWI’s food safety standards
since no money is spent if "nothing is going to happen", the consequences are also null.
Right, waiting and doing nothing is free. Dealing with the consequences is not. If you predict there will be no sea level rise, you will pay 1% of the cost associated with flooding due to higher sea levels, for example.
Can you point out any models that show CO2 levels even close to 1200ppm?
No, I was just commenting on the part that I quoted.
Whether atmosphere will go to 1200 ppm, I have no idea. I can't predict human behavior. Maybe we'll get another world war, crippling economy and energy infrastructure, leading to dramatic drop in output.
When did the world's glaciers START melting I wonder? Oh wait... 2.6 million years ago.
And the rate of melting has been constant over that time, or has it fluctuated ? And if it has fluctuated, what was the cause of these ? And when was the most recent fluctuation ? And the cause of that ?
Current CO2 levels are abnormally low compared to Earths Geologic History.
That is not an argument against the fact that at 1000+ ppm, some people start to feel uncomfortable. Modern humans are not used to the high CO2 concentrations that were present hundred millions of years ago.
CO2 levels over geologic time spans are usually much, much higher on Earth than the current 400 ppm. Levels in the thousands PPM are more normal.
Measured over those same time spans, the Sun was also weaker.
In fact, CO2 adjusts itself to counteract the Sun's output, because rock weathering, absorbing CO2 and turning it into carbonate, is accelerated at higher temperatures.
We're not finished yet. CO2 is still being added to atmosphere at increasing rate. First CO2 levels need to stabilize, and then you need to wait a few more decades before you can start claiming that some things will not happen.
Slashdot Mirror
Seems like it would be less work to just make a robot with legs that can walk up/down stairs. That also makes it easier to navigate other obstacles easier.
The effect of space operation is particularly of interest in specifying the mission computer for a manned Mars mission
Except that in LEO, the computers are protected by the Earth's magnetic field. Sending COTS parts to Mars would be a bad idea, especially if the crew's life depends on it.
When there's a hull breach, the loss of capacitors is probably the least of their worries.
Mars rovers have special rad-hard technology: https://en.wikipedia.org/wiki/...
Very expensive and rather slow compared to off-the-shelf computer stuff.
Running tests on the ISS isn't going to be very useful for when you want to go to Mars. Cosmic radiation gets much worse, and when a solar flare comes your way, there's no place to hide.
How do you model the cases where the tape gets caught in the mechanism and you have to spool it back in with a pencil ? Checkmate.
While I believe that parents should have the right to choose what is right for their children,
Like genital mutilation ?
we measured the total mercury concentration in vegetables and grain crops collected from farms located near two coal-fired power plants. We found that 79% of vegetable samples and 67% of grain samples exceeded the PTWI’s food safety standards
https://www.nature.com/article...
Arsenic in rice is also very common.
since no money is spent if "nothing is going to happen", the consequences are also null.
Right, waiting and doing nothing is free. Dealing with the consequences is not. If you predict there will be no sea level rise, you will pay 1% of the cost associated with flooding due to higher sea levels, for example.
just the natural cycling of the planet's climate
How does that work ? What is actually causing the up- and downturns in these cycles ?
Can you point out any models that show CO2 levels even close to 1200ppm?
No, I was just commenting on the part that I quoted.
Whether atmosphere will go to 1200 ppm, I have no idea. I can't predict human behavior. Maybe we'll get another world war, crippling economy and energy infrastructure, leading to dramatic drop in output.
I, for one, am glad that we have a cartoonist to settle these debates once and for all.
When did the world's glaciers START melting I wonder? Oh wait... 2.6 million years ago.
And the rate of melting has been constant over that time, or has it fluctuated ? And if it has fluctuated, what was the cause of these ? And when was the most recent fluctuation ? And the cause of that ?
I would like there to be serious consequences for these prediction not panning out.
Does that include the null predictions that nothing is going to happen ?
The clouds on Venus are not water but sulfuric acid.
You ignore the fact that the Sun was about 30% dimmer at the beginning of Earth's history, and has slowly increased to current power.
Current CO2 levels are abnormally low compared to Earths Geologic History.
That is not an argument against the fact that at 1000+ ppm, some people start to feel uncomfortable. Modern humans are not used to the high CO2 concentrations that were present hundred millions of years ago.
CO2 levels over geologic time spans are usually much, much higher on Earth than the current 400 ppm. Levels in the thousands PPM are more normal.
Measured over those same time spans, the Sun was also weaker.
In fact, CO2 adjusts itself to counteract the Sun's output, because rock weathering, absorbing CO2 and turning it into carbonate, is accelerated at higher temperatures.
Well obviously that never happened
We're not finished yet. CO2 is still being added to atmosphere at increasing rate. First CO2 levels need to stabilize, and then you need to wait a few more decades before you can start claiming that some things will not happen.
The whole thing seems a tad too simplified. We're talking about global climate here.
Did you read the whole paper before complaining it's a tad too simplified ?
Really, I'm not sure why this is even a story making the news.
Well, clicks obviously.
Yes, or put a brace around ankle or knee.
350-500k Model 3s vs 500k vehicles
We should also give North America back to the native peoples.
Most Arab states don't even recognize the sovereignty of the state of Israel. They all pretty much refer to them as Jews.