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by midtskogen
20 May 2021 14:41
Forum: Science and Astronomy Discussions
Topic: Science and Astronomy Questions
Replies: 1786
Views: 470153

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: 426
Views: 81568

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: 426
Views: 81568

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: 426
Views: 81568

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: 426
Views: 81568

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: 426
Views: 81568

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: 572
Views: 144554

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...
by midtskogen
08 May 2021 04:51
Forum: Science and Astronomy Discussions
Topic: Astrophotography
Replies: 572
Views: 144554

Astrophotography

The night sky is still dark enough for meteors.  Here's one meteorite candidate from last night.  Too small and over too difficult terrain to warrant any search, though.

larvik-20210508011026-gnomonic.jpg
by midtskogen
06 May 2021 03:05
Forum: Off-topic Discussions
Topic: Coronavirus (COVID-19) Thread
Replies: 426
Views: 81568

Coronavirus (COVID-19) Thread

There are reasons to worry.  We see a good share of protests against covid restrictions, and I think it's a sign of a healthy society that there are critical voices against the authorities, but, which is a bit sad, these critical voices tend to come from conspiracy theorists and various crackpots.  ...
by midtskogen
05 May 2021 22:23
Forum: Off-topic Discussions
Topic: Coronavirus (COVID-19) Thread
Replies: 426
Views: 81568

Coronavirus (COVID-19) Thread

36434 I've heard Australia has decided not to take back its citizens who were in India at the time, so they will be stranded there for the time being. Which makes me wonder whether law and basic citizen rights are amongst the victims of covid-19.  Though governmental responses to a pandemic are req...
by midtskogen
03 May 2021 08:52
Forum: Off-topic Discussions
Topic: Coronavirus (COVID-19) Thread
Replies: 426
Views: 81568

Coronavirus (COVID-19) Thread

Nature favours an R number around and close to 1.  If it stays much lower, the virus dies out.  If it stays much higher, the hosts quickly develops immunity or dies out.  In either case the virus fails, and the successful and persistent viruses manage to have an R near 1.  I agree that the simple an...
by midtskogen
30 Apr 2021 04:56
Forum: Science and Astronomy Discussions
Topic: Science and Astronomy News
Replies: 908
Views: 236157

Science and Astronomy News

Tree planting is a big piece in carbon accounting, and there are all sorts of problems with that, besides not dealing with the carbon sources.  The fastest growing trees will be preferred, creating monocultures and reducing biodiversity.  I rank giving nature enough space to do its own things higher...
by midtskogen
29 Apr 2021 22:31
Forum: Science and Astronomy Discussions
Topic: Science and Astronomy News
Replies: 908
Views: 236157

Science and Astronomy News

36406 Yes I am interested in that machine that converts CO2 to O2, do you think something like that scaled up could be used on Earth? As a way to remove some of the excess CO2? Something scaled up to, like, forests? Devices capturing carbon from the atmosphere are surely possible, but hardly practi...
by midtskogen
29 Apr 2021 00:30
Forum: Science and Astronomy Discussions
Topic: Science and Astronomy News
Replies: 908
Views: 236157

Science and Astronomy News

We've been flooded by news of helicopter flights on Mars, which is fun, but I'm actually more excited about all the rest we've heard nothing about.  The rover has many interesting instruments.  Remote controlling a helicopter on Mars is more a technological feat than it gives new knowledge about Mar...