Joana de Castro Arnaud
@jcastroarnaud.bsky.social
Uma pessoa simples, com umas ideias muito complicadas.
Mulher trans. Programadora de computador. Fã de ciência e matemática. Escritora amadora. Criadora de jogos amadora. Curiosa sobre um bocado de coisas.
Posts em português and/or English.
Mulher trans. Programadora de computador. Fã de ciência e matemática. Escritora amadora. Criadora de jogos amadora. Curiosa sobre um bocado de coisas.
Posts em português and/or English.
Pinned
Olá, esta é minha #introdução ao #Bluesky. Como é muito longa, deixo este primeiro post pendurado, e os outros são respostas a ele.
Sou brasileira, nascida em 1973. Sou #mulher #trans: #gênero feminino, sexo masculino; #lésbica e #arromântica. Pronomes femininos.
Sou brasileira, nascida em 1973. Sou #mulher #trans: #gênero feminino, sexo masculino; #lésbica e #arromântica. Pronomes femininos.
Reposted by Joana de Castro Arnaud
Reposted by Joana de Castro Arnaud
Acoustic guitars used to just be called ‘guitars.’
Then, we invented electric guitars. Oh no.
Which meant saying ‘guitar’ wasn’t clear enough.
So 'guitars' became 'acoustic guitars.'
‘Acoustic guitar’ is an example of a ‘retronym.’
🧵⬇️
Then, we invented electric guitars. Oh no.
Which meant saying ‘guitar’ wasn’t clear enough.
So 'guitars' became 'acoustic guitars.'
‘Acoustic guitar’ is an example of a ‘retronym.’
🧵⬇️
January 13, 2026 at 7:48 PM
Acoustic guitars used to just be called ‘guitars.’
Then, we invented electric guitars. Oh no.
Which meant saying ‘guitar’ wasn’t clear enough.
So 'guitars' became 'acoustic guitars.'
‘Acoustic guitar’ is an example of a ‘retronym.’
🧵⬇️
Then, we invented electric guitars. Oh no.
Which meant saying ‘guitar’ wasn’t clear enough.
So 'guitars' became 'acoustic guitars.'
‘Acoustic guitar’ is an example of a ‘retronym.’
🧵⬇️
Reposted by Joana de Castro Arnaud
@jsellenberg.bsky.social made a new Sudoku variant called Dyadiku, based on splitting the 8x8 grid into 8 rows, 8 columns, 8 2x4 rectangles, and 8 4x2 rectangles. It's fun, and you can play it at dyadiku.netlify.app. More about it on his blog: quomodocumque.wordpress.com/2026/01/05/d.... 🧮
January 6, 2026 at 7:22 PM
@jsellenberg.bsky.social made a new Sudoku variant called Dyadiku, based on splitting the 8x8 grid into 8 rows, 8 columns, 8 2x4 rectangles, and 8 4x2 rectangles. It's fun, and you can play it at dyadiku.netlify.app. More about it on his blog: quomodocumque.wordpress.com/2026/01/05/d.... 🧮
Reposted by Joana de Castro Arnaud
“Uma boa biblioteca é composta principalmente por livros não lidos. Essa é a ideia. Minha biblioteca funciona como um lembrete diário do que eu ainda não sei.” jnascim.info/anti-library
The Antilibrary: The Hidden Value of Unread Books -
The antidote to overconfidence is our relationship with knowledge. The antilibrary is the solution according to Nassim Taleb.
jnascim.info
December 29, 2025 at 3:27 PM
“Uma boa biblioteca é composta principalmente por livros não lidos. Essa é a ideia. Minha biblioteca funciona como um lembrete diário do que eu ainda não sei.” jnascim.info/anti-library
Reposted by Joana de Castro Arnaud
Latin had six noun cases, but in all Romance languages except Romanian, nouns and adjectives only have one singular form and one plural form left. What happened?
This extra large infographic tells you how the Latin case system collapsed – and why it's the accusative case that lives on in Romance.
This extra large infographic tells you how the Latin case system collapsed – and why it's the accusative case that lives on in Romance.
January 1, 2026 at 6:49 PM
Latin had six noun cases, but in all Romance languages except Romanian, nouns and adjectives only have one singular form and one plural form left. What happened?
This extra large infographic tells you how the Latin case system collapsed – and why it's the accusative case that lives on in Romance.
This extra large infographic tells you how the Latin case system collapsed – and why it's the accusative case that lives on in Romance.
Reposted by Joana de Castro Arnaud
Happy Caturday for all who celebrate 😸
December 27, 2025 at 1:54 PM
Happy Caturday for all who celebrate 😸
Reposted by Joana de Castro Arnaud
Think about refactoring.
Refactoring code is taking code, and changing *only* how it pieces together. It does the same thing, but it now does it with such as more reuseable parts, less hardcoding, etc.
It does the same thing as before, but it is now more maintainable. Easier to modify later.
Refactoring code is taking code, and changing *only* how it pieces together. It does the same thing, but it now does it with such as more reuseable parts, less hardcoding, etc.
It does the same thing as before, but it is now more maintainable. Easier to modify later.
December 27, 2025 at 6:13 PM
Think about refactoring.
Refactoring code is taking code, and changing *only* how it pieces together. It does the same thing, but it now does it with such as more reuseable parts, less hardcoding, etc.
It does the same thing as before, but it is now more maintainable. Easier to modify later.
Refactoring code is taking code, and changing *only* how it pieces together. It does the same thing, but it now does it with such as more reuseable parts, less hardcoding, etc.
It does the same thing as before, but it is now more maintainable. Easier to modify later.
Reposted by Joana de Castro Arnaud
Portuguese put the words it inherited from Latin through a lot of fascinating sound changes.
This becomes extra clear when you compare them to later borrowings of the same Latin word:
‘chão’ and ‘plano’ both come from Latin ‘plānum’!
Here’s episode 5 of my 10-part series.
Tomorrow: Romanian.
This becomes extra clear when you compare them to later borrowings of the same Latin word:
‘chão’ and ‘plano’ both come from Latin ‘plānum’!
Here’s episode 5 of my 10-part series.
Tomorrow: Romanian.
December 23, 2025 at 7:07 PM
Portuguese put the words it inherited from Latin through a lot of fascinating sound changes.
This becomes extra clear when you compare them to later borrowings of the same Latin word:
‘chão’ and ‘plano’ both come from Latin ‘plānum’!
Here’s episode 5 of my 10-part series.
Tomorrow: Romanian.
This becomes extra clear when you compare them to later borrowings of the same Latin word:
‘chão’ and ‘plano’ both come from Latin ‘plānum’!
Here’s episode 5 of my 10-part series.
Tomorrow: Romanian.
Reposted by Joana de Castro Arnaud
The most brutal way of telling someone they’re a few sandwiches short of a picnic that I’ve heard in French is t’es pas la truite la plus oxygénée de la rivière. It means “you’re not the most oxygenated trout in the river.”
* read on for similar insults from around the world (a thread)…
* read on for similar insults from around the world (a thread)…
December 19, 2025 at 12:28 PM
The most brutal way of telling someone they’re a few sandwiches short of a picnic that I’ve heard in French is t’es pas la truite la plus oxygénée de la rivière. It means “you’re not the most oxygenated trout in the river.”
* read on for similar insults from around the world (a thread)…
* read on for similar insults from around the world (a thread)…
Reposted by Joana de Castro Arnaud
"You will marry whoever you pick at the Royal Ball," the king told the princess.
"We'll hold another Ball," the king said. "Pick anyone of noble birth."
"We'll hold a third Ball," the king said. "Pick a man of noble birth."
"Wait," the queen said. "Maybe she doesn't even want to marry."
"What?"
"We'll hold another Ball," the king said. "Pick anyone of noble birth."
"We'll hold a third Ball," the king said. "Pick a man of noble birth."
"Wait," the queen said. "Maybe she doesn't even want to marry."
"What?"
December 14, 2025 at 10:14 PM
"You will marry whoever you pick at the Royal Ball," the king told the princess.
"We'll hold another Ball," the king said. "Pick anyone of noble birth."
"We'll hold a third Ball," the king said. "Pick a man of noble birth."
"Wait," the queen said. "Maybe she doesn't even want to marry."
"What?"
"We'll hold another Ball," the king said. "Pick anyone of noble birth."
"We'll hold a third Ball," the king said. "Pick a man of noble birth."
"Wait," the queen said. "Maybe she doesn't even want to marry."
"What?"
Reposted by Joana de Castro Arnaud
I'm playing around with Caleb Madrigal's "Fuzzy Graph" graphing "nonbinary" calculator. Rather than plotting where y equals f(x) (a binary condition), it shades the plot according to how close y is to f(x). fuzzygraph.com
November 14, 2025 at 6:12 PM
I'm playing around with Caleb Madrigal's "Fuzzy Graph" graphing "nonbinary" calculator. Rather than plotting where y equals f(x) (a binary condition), it shades the plot according to how close y is to f(x). fuzzygraph.com
Reposted by Joana de Castro Arnaud
🔐 Account Security Thread 🔐
We're seeing an increased number of phishing and social engineering attempts targeting Bluesky users. While we're working hard to protect you, here are essential steps YOU can take to secure your account and stay safe. 1/10
🧵👇
We're seeing an increased number of phishing and social engineering attempts targeting Bluesky users. While we're working hard to protect you, here are essential steps YOU can take to secure your account and stay safe. 1/10
🧵👇
November 14, 2025 at 8:00 PM
🔐 Account Security Thread 🔐
We're seeing an increased number of phishing and social engineering attempts targeting Bluesky users. While we're working hard to protect you, here are essential steps YOU can take to secure your account and stay safe. 1/10
🧵👇
We're seeing an increased number of phishing and social engineering attempts targeting Bluesky users. While we're working hard to protect you, here are essential steps YOU can take to secure your account and stay safe. 1/10
🧵👇
Reposted by Joana de Castro Arnaud
Reposted by Joana de Castro Arnaud
Reposted by Joana de Castro Arnaud
Milk fight between kittens
🐈⬛💥🐈
🐈⬛💥🐈
July 3, 2025 at 10:20 PM
Milk fight between kittens
🐈⬛💥🐈
🐈⬛💥🐈
Reposted by Joana de Castro Arnaud
Anti-Trans DARVO Examples
‘DARVO’ is an anagram for a common tactic used by abusers:
Deny (everything)
And
Reverse
Victim and
Offender
It is also a part of the propaganda campaign used by anti-trans proponents. 1/17
‘DARVO’ is an anagram for a common tactic used by abusers:
Deny (everything)
And
Reverse
Victim and
Offender
It is also a part of the propaganda campaign used by anti-trans proponents. 1/17
October 27, 2025 at 4:27 AM
Anti-Trans DARVO Examples
‘DARVO’ is an anagram for a common tactic used by abusers:
Deny (everything)
And
Reverse
Victim and
Offender
It is also a part of the propaganda campaign used by anti-trans proponents. 1/17
‘DARVO’ is an anagram for a common tactic used by abusers:
Deny (everything)
And
Reverse
Victim and
Offender
It is also a part of the propaganda campaign used by anti-trans proponents. 1/17
Reposted by Joana de Castro Arnaud
In August, two mathematicians found a shape that puts an end to a centuries-old geometric mystery. @ericaklarreich.bsky.social reports: www.quantamagazine.org/first-shape-...
First Shape Found That Can’t Pass Through Itself | Quanta Magazine
After more than three centuries, a geometry problem that originated with a royal bet has been solved.
www.quantamagazine.org
October 24, 2025 at 2:30 PM
In August, two mathematicians found a shape that puts an end to a centuries-old geometric mystery. @ericaklarreich.bsky.social reports: www.quantamagazine.org/first-shape-...
Reposted by Joana de Castro Arnaud
The White House Bluesky account @whitehouse-47.bsky.social is currrently followed by fewer than 5000 accounts. Over 65.000 accounts have blocked it.
Source: ClearSky: clearsky.app/whitehouse-4...
Source: ClearSky: clearsky.app/whitehouse-4...
October 18, 2025 at 12:15 PM
The White House Bluesky account @whitehouse-47.bsky.social is currrently followed by fewer than 5000 accounts. Over 65.000 accounts have blocked it.
Source: ClearSky: clearsky.app/whitehouse-4...
Source: ClearSky: clearsky.app/whitehouse-4...
I just found out that the White House is in Bluesky. Took a look: only Trumpist propaganda. Blocked with gusto. Will unblock after Trump is defenestrated from office.
October 23, 2025 at 9:01 PM
I just found out that the White House is in Bluesky. Took a look: only Trumpist propaganda. Blocked with gusto. Will unblock after Trump is defenestrated from office.
Reposted by Joana de Castro Arnaud
As of today I've been using Debian as my main OS for a whole year, and I cannot express how much better Unix-like systems are compared to the Windows way of Using A Computer. It's not even close.
Won't even get into the FOSS or telemetry aspects, too many things to mention so I'll just do a few...
Won't even get into the FOSS or telemetry aspects, too many things to mention so I'll just do a few...
October 23, 2025 at 2:02 AM
As of today I've been using Debian as my main OS for a whole year, and I cannot express how much better Unix-like systems are compared to the Windows way of Using A Computer. It's not even close.
Won't even get into the FOSS or telemetry aspects, too many things to mention so I'll just do a few...
Won't even get into the FOSS or telemetry aspects, too many things to mention so I'll just do a few...
Reposted by Joana de Castro Arnaud
We can't explain it, but putting a little line in the middle of a 7 is writing French.
October 17, 2025 at 6:38 PM
We can't explain it, but putting a little line in the middle of a 7 is writing French.
Reposted by Joana de Castro Arnaud
my fae nephews made a video together (one is the actor, the other did the filming and editing) and AFTER THE FACT I was informed they only made it under the EXPRESS UNDERSTANDING I would post it in its entirety
I was not informed ahead of time, but who am I to stifle ART
I was not informed ahead of time, but who am I to stifle ART
October 17, 2025 at 8:51 PM
my fae nephews made a video together (one is the actor, the other did the filming and editing) and AFTER THE FACT I was informed they only made it under the EXPRESS UNDERSTANDING I would post it in its entirety
I was not informed ahead of time, but who am I to stifle ART
I was not informed ahead of time, but who am I to stifle ART
Reposted by Joana de Castro Arnaud
![Comic. [Giant balloon reminiscent of a hot air balloon but wavy and laying on the ground with “bloop” “bloop” sound effects. Two people are in a basket attached to one end of the balloon.] [caption] Hot water balloon rides turn out to be significantly less romantic than the air kind.](https://cdn.bsky.app/img/feed_thumbnail/plain/did:plc:cz73r7iyiqn26upot4jtjdhk/bafkreiekfxpa7ftvzd2xpsuyjv5czmrpb5ihpmvnhj3ug5gadsrbbybx6m@jpeg)
October 14, 2025 at 7:53 PM
Reposted by Joana de Castro Arnaud
