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New
The latest blog posts to take off on Hacker News. 1,895 posts.
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Life Lessons from Machine Learning
What comes to mind when you hear the term “Machine Learning”? A bunch of programmers hunched over their computers in a dark room, working on something completely virtual & divorced from reality…
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Why Are Geospatial Databases So Hard to Build?
In 2005, I decided to design my first geospatial database engine. PostGIS was unable to keep up with the modest volumes of sensor data I was working with and while I was new to geospatial data, I had skill designing database engines. It seemed simple enough to get the scale and performance I required. Nothing could…
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Is the Mill CPU real? (2014)
I’ve seen the Mill CPU come up a number of times — maybe because I subscribed to their updates and so I get emails about their talks. They’re getting a bunch of buzz, but every t…
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The day I was DoSed by Google
I launched my startup this week. On a very modest scale, no debauched parties or penthouse offices on scads of VC money, just me and ...
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Fear of Failure and Lack of Speed in a Large Corporation
I just spent a day working with Bob, the Chief Innovation Officer of a very smart large company I’ll call Acme Widgets. Bob summarized Acme’s impediments to innovation. “At our company we have a cu…
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The Pannini Projection – perspective images with very wide fields of view
Pannini: A New Projection for Rendering Wide Angle Perspective Images Thomas K. Sharpless, Bruno Postle and Daniel M. German; International Symposium on Computational Aesthetics, London, June 2010.
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Motion sensing using the doppler effect
Recently I stumbled upon an interesting paper for implementing motion sensing requiring no special hardware, only a speaker and mic ! Unfortunately the paper didn't include code to test it, so I decided to reproduce it here on the web!
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Notes on 416 Days of Treadmill Desk Usage
The personal website of author Neal Stephenson, unless it's been hacked.
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Time travel in Braid
I bought Braid on the promise of lavish visuals and neat puzzles with temporal mechanics, and on this basis I was rewarded. I found some frustration with the controls, which I eventually traced to dodgy keyboard drivers - the game wouldn't register the up or down arrows while I ...
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Raytracing a Black Hole
It's now clear I'm on a Black Hole binge (I can stop when I want, by the way). They're endlessly fascinating. My recent interest was in particular focused on simulating visualizations of the Schwarzschild geometry. I was preoccupied by the problem of generating a decent accurate representation of how the curvature of…