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
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
Reposted by Joana de Castro Arnaud
"Pharaoh called in his wise men & sorcerers. The magicians of Egypt did the same thing by their spells: each man threw down his staff & they all turned into snakes."
Exodus 7:11-12
This is the 'Pharaoh's Serpents' demonstration, by YouTuber NileRed.
It uses toxic mercury(II) thiocyanate (Hg(SCN)2)
Exodus 7:11-12
This is the 'Pharaoh's Serpents' demonstration, by YouTuber NileRed.
It uses toxic mercury(II) thiocyanate (Hg(SCN)2)
October 14, 2025 at 11:24 PM
"Pharaoh called in his wise men & sorcerers. The magicians of Egypt did the same thing by their spells: each man threw down his staff & they all turned into snakes."
Exodus 7:11-12
This is the 'Pharaoh's Serpents' demonstration, by YouTuber NileRed.
It uses toxic mercury(II) thiocyanate (Hg(SCN)2)
Exodus 7:11-12
This is the 'Pharaoh's Serpents' demonstration, by YouTuber NileRed.
It uses toxic mercury(II) thiocyanate (Hg(SCN)2)
Reposted by Joana de Castro Arnaud
This two-parter below is exactly why it's hard to make clothes in the United States.
Let's look at how much it costs to produce a button-up shirt in the US. 🧵
Let's look at how much it costs to produce a button-up shirt in the US. 🧵
October 12, 2025 at 9:38 PM
This two-parter below is exactly why it's hard to make clothes in the United States.
Let's look at how much it costs to produce a button-up shirt in the US. 🧵
Let's look at how much it costs to produce a button-up shirt in the US. 🧵
Reposted by Joana de Castro Arnaud
I hate it when people say minimum wage jobs are entry level jobs or jobs for teenagers.
That is not what minimum wage was designed to be. It's supposed to be the minimum salary to lead a decent life--not just survival
That is not what minimum wage was designed to be. It's supposed to be the minimum salary to lead a decent life--not just survival
October 12, 2025 at 10:14 PM
I hate it when people say minimum wage jobs are entry level jobs or jobs for teenagers.
That is not what minimum wage was designed to be. It's supposed to be the minimum salary to lead a decent life--not just survival
That is not what minimum wage was designed to be. It's supposed to be the minimum salary to lead a decent life--not just survival
Reposted by Joana de Castro Arnaud
It's hard to help Americans left behind because so much of US identity is rooted in individualism. The average American conservative holds all three positions at once:
— Virtue signals about supporting US manufacturing
— Against raising the minimum wage
— Buys foreign imports because they're cheap
— Virtue signals about supporting US manufacturing
— Against raising the minimum wage
— Buys foreign imports because they're cheap
October 12, 2025 at 9:38 PM
It's hard to help Americans left behind because so much of US identity is rooted in individualism. The average American conservative holds all three positions at once:
— Virtue signals about supporting US manufacturing
— Against raising the minimum wage
— Buys foreign imports because they're cheap
— Virtue signals about supporting US manufacturing
— Against raising the minimum wage
— Buys foreign imports because they're cheap
Reposted by Joana de Castro Arnaud
An observation test for you - for your inner 8 year-old
“The artist has hidden 12 things in this picture. How many can you find?”
Treasure magazine, 1964
Official answers coming soon
(Even if you don’t reply, could you please ‘like’ or share this one? 🙏)
“The artist has hidden 12 things in this picture. How many can you find?”
Treasure magazine, 1964
Official answers coming soon
(Even if you don’t reply, could you please ‘like’ or share this one? 🙏)
October 11, 2025 at 7:07 AM
An observation test for you - for your inner 8 year-old
“The artist has hidden 12 things in this picture. How many can you find?”
Treasure magazine, 1964
Official answers coming soon
(Even if you don’t reply, could you please ‘like’ or share this one? 🙏)
“The artist has hidden 12 things in this picture. How many can you find?”
Treasure magazine, 1964
Official answers coming soon
(Even if you don’t reply, could you please ‘like’ or share this one? 🙏)
Reposted by Joana de Castro Arnaud
Asked my pal from Somerset if he knew anyone capable of taking the square root of -𝑟².
"I are!" he said.
That's a proof by country diction.
"I are!" he said.
That's a proof by country diction.
October 11, 2025 at 4:50 PM
Asked my pal from Somerset if he knew anyone capable of taking the square root of -𝑟².
"I are!" he said.
That's a proof by country diction.
"I are!" he said.
That's a proof by country diction.
Reposted by Joana de Castro Arnaud
DONATE TO WIKIPEDIA IF YOU CAN
October 2, 2025 at 11:35 AM
DONATE TO WIKIPEDIA IF YOU CAN
Reposted by Joana de Castro Arnaud
Do you ever think about the fact that Wikipedia is the last good major website on the internet? You aren't bombarded with ads. It doesn't try to push video on you, and it doesn't redirect you to a scam site.
October 2, 2025 at 12:33 AM
Do you ever think about the fact that Wikipedia is the last good major website on the internet? You aren't bombarded with ads. It doesn't try to push video on you, and it doesn't redirect you to a scam site.
Reposted by Joana de Castro Arnaud
It's worse. This graph is from an Axios post that is attached to a study that is built around this logical fallacy: Why is left-wing violence up? Historical context does not matter, and a chart from the same study makes the misdirection clear.
csis-website-prod.s3.amazonaws.com/s3fs-public/...
csis-website-prod.s3.amazonaws.com/s3fs-public/...
September 29, 2025 at 9:57 AM
It's worse. This graph is from an Axios post that is attached to a study that is built around this logical fallacy: Why is left-wing violence up? Historical context does not matter, and a chart from the same study makes the misdirection clear.
csis-website-prod.s3.amazonaws.com/s3fs-public/...
csis-website-prod.s3.amazonaws.com/s3fs-public/...
Reposted by Joana de Castro Arnaud
White House Deputy Press Secretary seen here posting data showing how much more prevalent right wing domestic terrorism is than left wing domestic terrorism... while thinking she's showing the reverse.
Apparently she can only read headlines, but not the actual graph with the data.
Apparently she can only read headlines, but not the actual graph with the data.
September 29, 2025 at 12:16 AM
White House Deputy Press Secretary seen here posting data showing how much more prevalent right wing domestic terrorism is than left wing domestic terrorism... while thinking she's showing the reverse.
Apparently she can only read headlines, but not the actual graph with the data.
Apparently she can only read headlines, but not the actual graph with the data.