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Is the Kalman filter just a low-pass filter?
Exploring the relationship between Kalman filtering and optimal frequency domain filtering.
Top posts
Every blog post that took off on Hacker News, ranked by the votes of its best submission. 49,212 posts.
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The life and death of a startup
At DjangoCon Europe 2017 , and again at DjangoCon US 2017 , I gave a talk entitled “Autopsy of a slow train wreck: The life and death of a Django startup”. After I gave those presentations, a number of people requested that I publish the content in blog form so they could share it with colleagues.
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Dutch Judge Who Ordered Pirate Bay Links Censored Has Conflict of Interest
Judge Chris Hensen, who ordered the Dutch Pirate Party to censor all links to The Pirate Bay recently (something Techdirt calls Censorship Crazy), appears...
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The Art of PNG Glitch (2015)
A documentation for all about glitching PNG.
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Intuitive Understanding of Euler’s Formula
Euler's identity seems baffling: It emerges from a more general formula: Yowza -- we're relating an imaginary exponent to sine and cosine! And somehow…
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A Stick Figure Guide to the Advanced Encryption Standard (AES)
(A play in 4 acts. Please feel free to exit along with the stage character that best represents you. Take intermissions as you see fit. Click on the stage if...
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Infinite Mac: Infinitemac.org
tl;dr: Infinite Mac has a new home at infinitemac.org . Using a new Emscripten port of Mini vMac, it is now able to run almost every notable version of Mac OS, from 1984’s System 1.0 to 2000’s Mac OS 9.0.4 . The project is also now accepting donations (via GitHub Sponsors or PayPal ).
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Managing database schema changes without downtime
How we manage schema changes at Discourse minimizing downtime
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Generating aerial imagery with your iPhone's Lidar sensor
This technical guide details how you can create your own aerial imagery and 3D models of streets with the built in iPhone LiDAR sensor and open source tools in the OpenDroneMap package.
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My First Unikernel
I wanted to make a simple REST service for queuing file uploads, deployable as a virtual machine. The traditional way to do this is to download a …
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Curl hearts Mozilla
Today Mozilla revealed the new logo and "refreshed identity". The new Mozilla logo uses the colon-slash-slash sequence already featured in curl's logo as I've discussed previously here from back before the final decision (or layout) was complete. The sentiment remains though. We don't feel that we can in any way claim…
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An Introduction to Stock Market Data Analysis with R – Part 1
This is my first article in a two-part series introducing stock data analysis using R.
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Whose bug is this anyway?
Some bugs look so impossible you start blaming the OS, the tools, or the compiler. This post digs into three of them.
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Knyle Style Sheets
Documentation for any flavor of CSS that you’ll love to write.
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The Internet Is for Porn
It always was, it always will be.
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Your body wasn’t built to last: a lesson from human mortality rates
What do you think are the odds that you will die during the next year? Try to put a number to it — 1 in 100? 1 in 10,000? Whatever it is, it will be twice as large 8 years from now. This s…
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Why did the web take over desktop and not mobile?
TLDR: “make the web do apps” is not a disruptive strategy. It's like surviving The Great Oxidation Event, then saying “make anaerobes do photosynthesis”. Ok, but the blue-green algae got there first, so photosynthesis is no longer asymmetric. It is symmetric competition.
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Git Rebase for the Terrified
As a maintainer of several OneBusAway projects, I regularly ask contributors to rebase their branches before merging. The response is often hesitation or…
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Wasting time in tech interviews
TL;DR This is me ranting about crappy tech interview experiences
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Claude Code is a slot machine
Claude Code keeps me waiting. Here I am pressing return like a crack-addicted rodent in a lab. “Yes, I want to make this edit.” I watch as it works, glassy-eyed and bored as the code scrolls by, and on the edge of my seat because my ideas are about to become reality.
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