michaelbach - Network

No joke of the day: FrACT₁₀, the Freiburg Acuity & Contrast Test https://michaelbach.de/fract/ now features Dithering for contrast...

No joke of the day: FrACT₁₀, the Freiburg Acuity & Contrast Test https://michaelbach.de/fract/ now features Dithering for contrast optotypes. This allows the full physiologic range on standard displays.
Details on dithering: https://michaelbach.de/2024/03/29/fract10-dithering.html

Seasons greetings to all! My vote goes for peace and saving the climate…Quite unspectacular: The “Xmas Colours Illusion”The two...

Seasons greetings to all! My vote goes for peace and saving the climate…

Quite unspectacular: The “Xmas Colours Illusion”
The two greens are actually identical, see https://michaelbach.de/ot/col-whiteXmas/

A new illusion on my site:https://michaelbach.de/ot/ang-OrbisonKinetic/Matsunaga, Ito & Kanematsu recently discovered a _kinetic_...

A new illusion on my site:
https://michaelbach.de/ot/ang-OrbisonKinetic/
Matsunaga, Ito & Kanematsu recently discovered a _kinetic_ variant of the Orbison illusion, which is markedly stronger. Enjoy!

The Freiburg Vision Test FrACT₁₀ https://michaelbach.de/fract/ has learned something new: Assessment of grating contrast thresholds. You...

The Freiburg Vision Test FrACT₁₀ https://michaelbach.de/fract/ has learned something new: Assessment of grating contrast thresholds. You select spatial frequency and patch diameter (in Settings>Contrast), and it will hone in on the threshold. An approximate Gaussian window smoothes the grating edge. Error diffusion allows for accurate threshold in spite of 8 bit limits. Downloadable as WebApp. For giggles try 'Autorun to target contrast'.
#vision #visionscience #acuity #psychophysics #visualacuity

Website of the day: https://gigagalacticrockets.com/I had thought it improbable that I might get into space in my lifetime, but this #space...

Website of the day: https://gigagalacticrockets.com/
I had thought it improbable that I might get into space in my lifetime, but this #space innovation made my day!

Das Volksbegehren gegen "Gendern in Behörden und … in Ba-Wü" https://stoppt-gendern-in-bw.de/aufruf (Quorum erreicht!) führte...

Das Volksbegehren gegen "Gendern in Behörden und … in Ba-Wü" https://stoppt-gendern-in-bw.de/aufruf (Quorum erreicht!) führte mich zu "Wissenschaftler kritisieren Genderpraxis des ÖRR" https://www.linguistik-vs-gendern.de, dann zu "Sind wir moralisch verpflichtet, eine gendergerechte Sprache zu verwenden?" von Kipke https://link.springer.com/article/10.1007/s42048-023-00137-2. Großartig: Leichtfüßig, prägnant, argumentationsscharf… so würde ich gerne schreiben können! Ergebnis? Die Argumentationstiefe lässt sich nicht angemessen in einem Satz abbilden :).

Ich bin ja unglücklich über den Genderstern und habe das ausführlich...

Ich bin ja unglücklich über den Genderstern und habe das ausführlich begründet
https://michaelbach.de/2021/07/13/warum-der-Genderstern-schlecht-ist.html
Jetzt gibt es in BADEN-WÜRTTEMBERG eine Petitionsliste für ein Volksbegehren:
https://stoppt-gendern-in-bw.de/

FrACT (Freiburg Vision Tests) now also as WebApp. This magically avoids installing, yet you get a full app. (Nearly) all platforms! And...

FrACT (Freiburg Vision Tests) now also as WebApp. This magically avoids installing, yet you get a full app. (Nearly) all platforms! And remains free.
https://michaelbach.de/fract/#webApp

#vision #webapp #PWA #visionScience

Dear colleagues:Calendar events can sit in an *.ics file, fine; I can create one and it works. However, I want to generate a clickable link...

Dear colleagues:
Calendar events can sit in an *.ics file, fine; I can create one and it works. However, I want to generate a clickable link on a website, possibly using the `webcal:` protocol, including the event als ical *string* – not linking to an *.ics file. Is this possible at all?
It would be so much easier to create "add to my calendar" buttons this way.
Thanking you for your thoughts in advance!

#iCalendar #webCal

My "home"work today… But, oh my, has wood become more expensive, now price is at 150% of last year.

My "home"work today… But, oh my, has wood become more expensive, now price is at 150% of last year.

This "old hat" #illusion https://michaelbach.de/ot/mot-pigeonNeck/ generated the comment (thank you) "this is the Moiré...

This "old hat" #illusion https://michaelbach.de/ot/mot-pigeonNeck/ generated the comment (thank you) "this is the Moiré effect" – No, I thought, but then began to think… Well it might… Hours later, I had added new colour selections to the little app. These, IMHO, argue against the Moiré explanation; so still the explanation of the “Stepping feet” illusion https://michaelbach.de/ot/mot-feetLin/ obtains, methinks. #visionscience #vision

@jonah Please add me to Science. #Trunk

@jonah Please add me to Science. #Trunk

"People with more extreme attitudes towards #science have self-confidence in their understanding of science, even …" #2 of...

"People with more extreme attitudes towards #science have self-confidence in their understanding of science, even …" #2 of 2

·Electrons are smaller than atoms
·Tomatoes do not naturally contain genes—genes are only found in genetically modified tomatoes
·Dinosaurs and humans share a common ancestor
·The spread of new variants of viruses can occur through natural selection
·COVID-19 is caused by bacteria
·Viruses are smaller than bacteria.

Answers → https://doi.org/10.1371/journal.pbio.3001915

"People with more extreme attitudes towards #science have self-confidence in their understanding of science, even if this is not...

"People with more extreme attitudes towards #science have self-confidence in their understanding of science, even if this is not justified" #1 of 2
Look at these questions:
·All plants and animals have DNA
·The oxygen we breathe comes from plants
·The cloning of living things produces genetically identical copies
·By eating a genetically modified fruit, a person’s genes could also become modified
·All radioactivity is human-made
·It is the mother’s genes that determine the sex of the child
…

More on the teaching material for the #Cornelsen book:The back cover shows an apple. Scanning that leads you to Wilhelm Tell, you know, the...

More on the teaching material for the #Cornelsen book:
The back cover shows an apple. Scanning that leads you to Wilhelm Tell, you know, the apple story (but without showing the apple is on the head of the son), only to lead on to Schiller for a very German thing… :). More BS all around… Just what you need to learn when, as a migrant, the major hassle is having to deal with bureaucracy!

Just helped a friend who is preparing to give language courses for migrants based on a book by #Cornelsen Verlag (a German publisher). First...

Just helped a friend who is preparing to give language courses for migrants based on a book by #Cornelsen Verlag (a German publisher). First page: a QR code for additional on-line material, leading the the play store (!), and **no explanation anywhere** that this does not help you on iPhones. To someone non-computer-savvy is is a full show stopper. Yes, here market share of #Android is larger than #iOS, and maybe in migrants more, but revealing major incompetence by said publisher. Disappointed.

Been away for a while, much depressing disease around me (on top of world climate in more than one sense)…Now built a new (of sorts) angle...

Been away for a while, much depressing disease around me (on top of world climate in more than one sense)…
Now built a new (of sorts) angle #illusion, striving for the simplest arrangement showing #illusions https://michaelbach.de/ot/ang-obliqueSimple/
#VisionScience

Dear #JoanMastodon I've placed the attached #qrcode on my Twitter account, accompanied by "Leaving towards some ancient...

Dear #JoanMastodon I've placed the attached #qrcode on my Twitter account, accompanied by "Leaving towards some ancient elephant…".
That was yesterday and my account still has not been banned! Obviously, I'm too unimportant! Am deeply depressed! What can I do?

[Asking for a friend]

#JohnMastodon

#ggplot #rstats #unicode #pdf I had written on using unicode in ggplot PDFs: https://michaelbach.de/2020/03/22/ggplotAndUnicode.html....

#ggplot #rstats #unicode #pdf I had written on using unicode in ggplot PDFs: https://michaelbach.de/2020/03/22/ggplotAndUnicode.html. However it didn't work today with more exotic unicode ♀♂. Library "emojifont" doesn't plot shapes I like. Digging deeper, looks like `Cairo` has changed (or my error). Whatever, it is easier now: theme(…font…) not necessary, but the ggsave command needs font to properly embed like so:
`ggsave(filename='xyz.pdf', device=cairo_pdf, family="Arial Unicode MS", …)`. Needs `library(Cairo)`, of course.

In etwas über einer Stunde halte ich einen Vortrag über mein Buch "Unterhaltsame Sehphänomene"....

In etwas über einer Stunde halte ich einen Vortrag über mein Buch "Unterhaltsame Sehphänomene". Hier
https://kortizes.de/event/15-12-2022/
kann man sich anmelden. Freue mich über alle Teilnehmer!