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Olaf Dreyer Profile picture
Olaf Dreyer
@olafdreyer
Scientist, writer, photographer, consultant, and always curious.
Mar 29, 2020 • 5 tweets • 3 min read
Again: Good news/bad news situation in the #US.

The good news: The slope of the curve representing total number of cases is decreasing (see the red circle).

#CoronavirusUSA Image The bad news: the curve representing deaths still has the same slope. Image
Mar 19, 2020 • 5 tweets • 4 min read
Why it is important to act *fast*:

I remember the first time I encountered exponential growths. It was in this question:

(spoilers ahead)

#coronavirus #covid19 #StayAtHome Image The answer is day 49. The lillies will cover half the lake in the last day.

That is the defining characteristic of exponential growth. Everything happens now. Image
Aug 31, 2019 • 4 tweets • 2 min read
Did @realDonaldTrump take a picture of a *projected* picture and tweet it out? Image The shadow in the lower right seems to be the shadow of the person taking the picture. To get a shadow like that on a letter sized picture is not possible because the size of the head itself sets a lower limit on the size of the shadow and a head is basically letter sized.
Aug 11, 2019 • 5 tweets • 3 min read
I am totally confused by the reaction to #TheHuntMovie. Image People on the right seems to be upset by the depiction of deplorables (see their pictures below) being hunted be the 'Elite'. Image