Hacker News: woliveirajr

New comment by woliveirajr in "Don't Paste the AI, please"

woliveirajr — Thu, 20 Aug 2026 11:01:50 +0000

I'd love the link to all those Principles

New comment by woliveirajr in "Online clinics and influencers are promoting Cialis as a longevity drug"

woliveirajr — Mon, 17 Aug 2026 13:50:04 +0000

Sildenafil [0] was synthesized to treat high blood pressure. Erectile disfunction was a side effect that raised much more interest.

Tadalafil [1] followed the path of Sildenafil about the phosphodiesterase type 5 (PDE5) enzyme inhibitor.

Help to live longer was the main objective since the beginning.

[0] https://en.wikipedia.org/wiki/Sildenafil#History [1] https://en.wikipedia.org/wiki/Tadalafil#History

New comment by woliveirajr in "Compression is prediction"

woliveirajr — Tue, 11 Aug 2026 20:57:30 +0000

There is Compression done by Prediction by partial matching [0]

There is the Kolmogorov Complexity [1], Normalized Information Distance [2] and Normalized compression distance [3] that correlates those.

Finally, there's the Pre-Big Bang Informational Compression and the Delayed Release of Antimatter [4]

All big {rabbit/black} holes to lose some time, if you have any.

[0] https://en.wikipedia.org/wiki/Prediction_by_partial_matching

[1] https://en.wikipedia.org/wiki/Kolmogorov_complexity

[2] https://homepages.cwi.nl/~paulv/papers/chapter08.pdf

[3] https://en.wikipedia.org/wiki/Normalized_compression_distanc...

[4] https://philarchive.org/rec/GREPBI

New comment by woliveirajr in "Parametron: 50s Japanese computer that uses neither transistors nor vacuum tubes"

woliveirajr — Mon, 10 Aug 2026 16:54:29 +0000

Some years later, Goto was considered harmful :-)

A Trailing Slash Bypassed AWS API Gateway Authorization

woliveirajr — Thu, 06 Aug 2026 14:10:11 +0000

Article URL: https://www.infoq.com/news/2026/06/aws-api-gateway-auth-bypass/

Comments URL: https://news.ycombinator.com/item?id=49196942

Points: 1

# Comments: 0

New comment by woliveirajr in "The Cold Email"

woliveirajr — Thu, 30 Jul 2026 13:45:22 +0000

In 2013 there was some question about the SuperCow Powers that some programs had. I took time to ask Jason Gunthorpe about it. He didn't answer my email: we make a post about it [1] that became the canonical explanation. That had a huge impact on me: how could I take so long to answer simple questions from friends when Jason Gunthorpe took time to answer mine?

[1] https://web.archive.org/web/20190322061230/https://plus.goog...

New comment by woliveirajr in "US tobacco firms applied tobacco strategies to globalize ultra-processed foods"

woliveirajr — Fri, 05 Jun 2026 12:17:01 +0000

It seems similar to just regular marketing. Previously, beverages and drugs companies have used the same playbook, and data analysis just got better. Social sites are just the next step with even more behavioural data.

Normalized Compression Distance

woliveirajr — Fri, 29 May 2026 17:44:26 +0000

Article URL: https://en.wikipedia.org/wiki/Normalized_compression_distance

Comments URL: https://news.ycombinator.com/item?id=48326633

Points: 1

# Comments: 0

New comment by woliveirajr in "The Secret Garden of Rock-Paper-Scissors"

woliveirajr — Fri, 29 May 2026 17:44:00 +0000

Seems a lot like Normalized Compression Distance (https://en.wikipedia.org/wiki/Normalized_compression_distanc...) and Kolmogorov Complexity.

New comment by woliveirajr in "Digital Identity Management in Norway Is a Catastrophe"

woliveirajr — Fri, 29 May 2026 14:49:52 +0000

Brazil has the same. It's possible to login in the government platform by your bank login. Simplifies a lot for the general population that won't use password managers and so on. And, as banks use a 2FA, security is improved.

New comment by woliveirajr in "Toxicity on Social Media – The Noisy Room"

woliveirajr — Tue, 12 May 2026 11:45:56 +0000

Perhaps this: https://en.wikipedia.org/wiki/Spiral_of_silence

New comment by woliveirajr in "Barn Owls Know When to Wait"

woliveirajr — Thu, 12 Feb 2026 23:37:34 +0000

C= |2p - 1| doesn't do what the author wishes.

Should be c =|2p|-1

New comment by woliveirajr in "Scientists identify brain waves that define the limits of 'you'"

woliveirajr — Mon, 26 Jan 2026 13:12:42 +0000

A cell phone vibrating in your pocket: in the first days, after some days of use, many people would feel it vibrating as a muscle sensation, not as external thing vibrating.

New comment by woliveirajr in "Management Time: Who's Got the Monkey? [pdf]"

woliveirajr — Sat, 24 Jan 2026 14:41:05 +0000

Well, that actually happens a lot, with many causes.

For example: manager is perfectionist (at some level), it takes more time to delegate than doing it yourself, there's some attitude from the subordinate to undermine the manager, there's lot of work in a specific season and manager prefer to do it himself than risking his job due to a bad work form a subordinate

In an ideal world, of course the manager would replace the subordinate. But in real life, sometimes you can't find someone in the adequate time and is better to have him doing 75% of the work instead of 0%...

New comment by woliveirajr in "Kernel bugs hide for 2 years on average. Some hide for 20"

woliveirajr — Thu, 08 Jan 2026 12:32:59 +0000

But the patchset should use the same license as the original code, shouldn't?

New comment by woliveirajr in "A4 Paper Stories"

woliveirajr — Wed, 07 Jan 2026 14:16:57 +0000

Reverse: perhaps carrying a measuring tape [0] ?

[0] https://www.amazon.com/Measure-iBayam-Measuring-Measurement-...

New comment by woliveirajr in "Standard Ebooks: Public Domain Day 2026 in Literature"

woliveirajr — Fri, 02 Jan 2026 12:32:15 +0000

> tighter

I found it amusing, considering all those memes about German words with 35 letters each.

And, as I get older, I began to consider letter size relevant to choose a book edition. Gave up buying new books and went for used, older editions with bigger letters.

New comment by woliveirajr in "Beginning January 2026, all ACM publications will be made open access"

woliveirajr — Thu, 18 Dec 2025 16:05:59 +0000

Didn't expect Brazil being off the "List of Countries Qualifying for APC Waivers"

Knowing the reality of the Brazilian's public universities, the bureaucracy of the Government and the condition of the students in general, I'm pretty sure we won't have articles from Brazil anymore.

New comment by woliveirajr in "I'm Kenyan. I don't write like ChatGPT, ChatGPT writes like me"

woliveirajr — Mon, 15 Dec 2025 12:58:26 +0000

And good students are getting in trouble (meaning "have to explain themselves") to lousy teachers just because they write well, articulate ideas and can summarize information from documents where other regular people would make mistakes.

New comment by woliveirajr in "Texas Attorney General Sues Epic for Gatekeeping Medical Data"

woliveirajr — Sat, 13 Dec 2025 12:53:22 +0000

I never understood how any exams results aren't given to the person and are hold by the doctor/hospital/company.