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by midtskogen
11 Jun 2021 13:12
Forum: Science and Astronomy Discussions
Topic: Science and Astronomy News
Replies: 882
Views: 205011

Science and Astronomy News

Most such UFO videos from aircrafts appear to be illusions of some kind.  Like parallax effects and misjudged distances, which can make the object (birds or whatever) appear to have insane speed.  It's hard to tell from the videos alone, but if we had the speed, altitude, focal length and other data...
by midtskogen
11 Jun 2021 00:42
Forum: Science and Astronomy Discussions
Topic: Astrophotography
Replies: 570
Views: 129026

Astrophotography

No filters or eclipse glasses necessary.  Just lucky to see anything through the clouds.
by midtskogen
10 Jun 2021 03:49
Forum: Science and Astronomy Discussions
Topic: Astrophotography
Replies: 570
Views: 129026

Astrophotography

Only a few glimpses of today's partial eclipse were possible.
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by midtskogen
23 May 2021 10:23
Forum: Science and Astronomy Discussions
Topic: Science and Astronomy Questions
Replies: 1786
Views: 416322

Science and Astronomy Questions

36528 No not magnetic tracks.....magnetic fields that raise cars above the ground. And how is steering, breaking and accelleration supposed to work? https://www.goudsmit.co.uk/maglev-cars-fantasy-or-reality/ Magnetic levitation I mean, how is it supposed to work in the real world, to be distinguish...
by midtskogen
22 May 2021 08:36
Forum: Science and Astronomy Discussions
Topic: Science and Astronomy Questions
Replies: 1786
Views: 416322

Science and Astronomy Questions

A-L-E-X wrote:
Qr Bbpost No not magnetic tracks.....magnetic fields that raise cars above the ground.

And how is steering, breaking and accelleration supposed to work?
by midtskogen
21 May 2021 11:07
Forum: Science and Astronomy Discussions
Topic: Science and Astronomy Questions
Replies: 1786
Views: 416322

Science and Astronomy Questions

A-L-E-X wrote:
Qr Bbpost  How fa away are we from hover cars?

If the cars are locked to magnetic tracks, it's really a train, isn't it?  And in a future like that personal cars have become obsolete.
by midtskogen
20 May 2021 22:53
Forum: Science and Astronomy Discussions
Topic: Science and Astronomy News
Replies: 882
Views: 205011

Science and Astronomy News

A-L-E-X wrote:
Qr Bbpost This is a pretty amazing discussion on the quantum nature of time

Possibly, but paywalled.
by midtskogen
20 May 2021 14:41
Forum: Science and Astronomy Discussions
Topic: Science and Astronomy Questions
Replies: 1786
Views: 416322

Science and Astronomy Questions

I can't remember if we've discussed it here before many years ago, as this is a science fiction vision I've had for quite some time: Cars will be electric and charged by induction on highways.  Car batteries can be relatively small and light, sufficient to keep the car going on the smaller roads.  S...
by midtskogen
20 May 2021 14:29
Forum: Off-topic Discussions
Topic: Coronavirus (COVID-19) Thread
Replies: 365
Views: 60704

Coronavirus (COVID-19) Thread

36517 Since the pandemic began I worked with the assumption that it is about 1% (or with some fuzziness depending on uncertainties and social factors: 0.5 to 2%), based on the reported CFRs in specific outbreaks and knowing roughly the fraction of asymptomatic cases. Then the antibody studies in Ne...
by midtskogen
20 May 2021 00:25
Forum: Off-topic Discussions
Topic: Coronavirus (COVID-19) Thread
Replies: 365
Views: 60704

Coronavirus (COVID-19) Thread

36506 The excess deaths in Peru are now 503 per 100,000 people, suggesting an infection mortality rate greater than 0.5%. Maybe, as in suggesting that covid in countries with negative excess deaths makes people healthier.  Mortality rates need to be divided into population groups like age to become...
by midtskogen
17 May 2021 22:34
Forum: Off-topic Discussions
Topic: Coronavirus (COVID-19) Thread
Replies: 365
Views: 60704

Coronavirus (COVID-19) Thread

36480 So the CDC just relaxed its mask guidance for vaccinated people, both indoors and outdoors. The scientific reasoning behind it sounds good, but the policy is terrible in practice. The main motivation seems to be to act as an incentive for more people to get vaccinated. Which we desperately ne...
by midtskogen
10 May 2021 00:49
Forum: Off-topic Discussions
Topic: Coronavirus (COVID-19) Thread
Replies: 365
Views: 60704

Coronavirus (COVID-19) Thread

36463 A good way to think about cloth masks is that they roughly double the duration of exposure needed to get infected. So you should still social distance and limit exposure even with a mask. The mask is increasing your safety margin. I think that's the wrong message.  The main purpose of masks i...
by midtskogen
09 May 2021 23:09
Forum: Off-topic Discussions
Topic: Coronavirus (COVID-19) Thread
Replies: 365
Views: 60704

Coronavirus (COVID-19) Thread

36459 Their fear may be that many people don't understand what airborne transmission really means, and could incorrectly conclude that they can just get it from anywhere, or that masks or other measures won't be effective. If the emphasis had been "avoid places indoors with many people" r...
by midtskogen
09 May 2021 00:20
Forum: Science and Astronomy Discussions
Topic: Astrophotography
Replies: 570
Views: 129026

Astrophotography

We can see the Perseids in astronomical twilight in the southernmost parts of the country, but it's fairly limited.  I rarely bother.  Geminids, on the other hand...
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