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Rafael Ferreira
Works at Nubank
Attended USP
Lives in São Paulo
299 followers|157,666 views
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Rafael Ferreira

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All those jokes about Unix and C letting you shoot yourself in the foot? I pretty much lost it at the phrase “the attacker can just as easily lock out the user or erase the gun’s entire file system”—yes, that's right, the gun's file system, because these are “high-end, Linux-power[ed] rifles”.

(The good news is that they're Linux-powered, so first you have to make fight over which distribution is ethically compliant; then make sure you get your device drivers configured, half of which won't; then you get to argue about which window manager to use; then you choose from the million screensavers; by the time you're done, you probably don't want to shoot anything any longer.)
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Rafael Ferreira

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Cosmonautics museum in Moscow
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The story of one man determined to teach third graders about binary by only asking them questions. The whole transcript of him asking questions and the third graders yelling back answers is great.
The following is a transcript of a teaching experiment, using the Socratic method, with a regular third grade class in a suburban elementary school. I present my perspective and views on the session, and on the Socratic method as a teaching tool, following the transcript.
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Rafael Ferreira

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Yesterday we published more details on the past decade of our cluster networking work, with lots of pictures (see article below).  For the technical details see this blog post: http://googleresearch.blogspot.com/2015/08/pulling-back-curtain-on-googles-network.html and for the gory details this SIGCOMM paper: http://static.googleusercontent.com/media/research.google.com/en//pubs/archive/43837.pdf.
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Lots of interesting regional trends in these maps. (Warning: contains strong language, which is the point.)

https://stronglang.wordpress.com/2015/07/28/mapping-the-united-swears-of-america/
Swearing varies a lot from place to place, even within the same country, in the same language. But how do we know who swears what, where, in the big picture? We turn to data – damn big data. With g...
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Genial
 
Algum retardado criou um processo para evitar ir ao DETRAN pessoalmente no caso de mudança de endereço do condutor, no qual um dos passos é ir ao DETRAN pessoalmente.

"Condutores registrados no estado do Paraná que possuem talões de água (SANEPAR) e/ou luz (COPEL) registrados em seu nome, poderão alterar o endereço sem sair de casa através do DETRAN Fácil, além de diversos serviços que anteriormente só poderiam ser realizados nas Unidades de Atendimento. Clique aqui, realize seu pré-cadastro e compareça ao DETRAN mais próximo de sua residência para finalizar o cadastro."
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Okay, this is awesome. A complete transistor level simulation of the 6502 processor, done via a process that involves melting the cover of the chip with 200°F hot sulfuric acid to expose the die, taking 72 microscope images, stitching then together to make a 342Mpixel image, and then finding polygons that represent wires and transistor to then emulate the whole thing in software.

The slides from the SIGGRAPH talk are great:
http://www.visual6502.org/docs/6502_in_action_14_web.pdf
Visual Transistor-level Simulation of the 6502 CPU and other chips! Welcome to Visual6502.org! Here we'll slowly but surely present our small team's effort to preserve, study, and document historic computers. We aim to present our work in a visual, intuitive manner for education and inspiration, ...
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Circle us for a 6502 post every week, +Rafael Ferreira!
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Have him in circles
299 people
Josh Suereth's profile photo
Chris Dawson's profile photo
Rafael Carvalho's profile photo
Roberto Marin's profile photo
Meell Rodrigues Cantora's profile photo
Leonardo Bessa's profile photo
Tom Øyvind Hogstad's profile photo
Caio Filipini's profile photo
Guilherme Moreira's profile photo
Work
Occupation
Programmer,
Employment
  • Nubank
    Senior Software Engineer, 2013 - present
    https://www.nubank.com.br
  • R7.com
    Systems Architect, 2011 - 2013
  • R7.com
    Specialist Software Engineer, 2010 - 2011
  • Caelum
    Programmer,, 2008 - 2010
  • Sun
    2006 - 2008
  • Twic
Places
Map of the places this user has livedMap of the places this user has livedMap of the places this user has lived
Currently
São Paulo
Previously
Curitiba
Links
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Tagline
http://rafaelferreira.net
Introduction
Programming language enthusiast and all-around loudmouth.
Education
  • USP
    2003
  • CEFET-PR
  • Jean Piaget
Basic Information
Gender
Male
Other names
Rafael de F. Ferreira, Rafael de França Ferreira