peter303_

peter303_ t1_ja9hqda wrote

Geophysicists measured a magnetic reversal happening 16.7 million years ago through centuries of lava flows. The field doesnt flip suddenly (like every 22 years on the Sun), but weakens and flickers over several centuries before reorganizing in the opposite direction. A magnetic compass would not be useful for navigation during this period.

Computer simulations of the geomagnetic dynamo also sees flickering, both with and without a reversal. Its possible we are merely in a minor flicker now or in the early stages of a full reversal. The intensity of the Earths field is down by 8% since first measurements about 200 years ago. There are claims of a stronger field millennia ago measured in pottery made from high iron clays. They would magnetize slightly after cooling off.

https://academic.oup.com/gji/article/186/2/580/587671

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peter303_ t1_ja68zwz wrote

The official US position is there is a human in the decision loop for death decisions.

Now many other companies have developed drones, a human oversight is not always the case.

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peter303_ t1_j92q82b wrote

Special purpose CPUs that perform lower precision calculations that are fine for neural nets. You need 64 bit floating point for weather prediction, but 8 bit integer works OK for some neural calculations. The previous CPUs could downshift to smaller numbers, but were not proportionally faster. The new ones are. NVIDIA, Google, Apple have special neural chips.

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peter303_ t1_j8zxoea wrote

For those who remember the 1950s, the launch of Sputnik was somewhat terrifying because there was this object from the Enemy going over our heads every 90 minutes and we couldnt do shit about it. After ten thousand satellites from everywhere people dont worry that much. Its puzzling to me why balloon-gate revives the same fears.

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peter303_ t1_j8gqmz8 wrote

Lithium batteries are good for a thousand charges. Thats when a mobile device starts to fade. I think in some models one can replace the battery. Even Apple has issued a repair manual, but its not easy.

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peter303_ t1_j79t5sh wrote

Actually, when the Big Bang became the predominant cosmological theory in the 1960s, some criticized it as being too much like Biblical Creation. Scientists follow the evidence and dont care if the evidence supports a religious idea or not.

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peter303_ t1_j6gnqzj wrote

Arabic speaking scientists carried the science torch from 700 C.E. To 1200 C.E. More classical works would have been lost if they didnt copy them.

We have Genghis Khan to thank for ending Arabic cultural hegemony. When hordes encountered resistant cities, they killed 99% and enslaved the useful remaining 10%.

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peter303_ t1_j6e7av4 wrote

Answer: They have been saying this for 60 years with every development if software engineering. Assemblers and compilers are an early form of A.I. called expert systems.

The number of programmers per CPU has been steadily declining over the decades. In mainframe days you had dozens of programers per mainframe. By the early PC days and the invention of retail software it declined to less than one programmer per computer. Now will trillions of CPUs in every king of appliance and huge server farms, there are many thousands ofCPUs per programmer.

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