Category Archives: Science

Hiatus

Posted on June 15, 2014 by ejrh

Over a year has passed since I posted anything here. What’s been happening? I have changed job. I’m not overworked by any means, but I have found that I have less time and energy left for the frivolous, but stimulating, … Continue reading →

Posted in Hardware, Programming, Reflections, Science | Tagged , , | Leave a comment

Sequent calculus fun with Logitext

Posted on July 4, 2012 by ejrh

(This post is overdue; I’ve been more than usually busy at work on a new project, and have not had the energy to do anything interesting when I get home. Well, I saw this a while ago and today out … Continue reading →

Posted in Math, Programming | Tagged , | 2 Comments

Manufactoria

Posted on June 8, 2012 by ejrh

Last Friday I stumbled on Manufactoria, a cute web-based game in which the object is to build machines for testing and repairing robots. This is done by manipulating a robot’s code, a sequence of red and blue symbols. Each part … Continue reading →

Posted in Games, Math, Programming | Tagged , , | 4 Comments

Images in space

Posted on April 22, 2012 by ejrh

A common project attempted by programmers of a certain naiveté is classification. For example, classifying images based on their characteristics. A lot of applied AI is about classifying stuff. The applications are things like a search engine for similar images, … Continue reading →

Posted in Math, Programming | Tagged , , | 1 Comment

Crop circles and other rounding errors

Posted on November 13, 2011 by ejrh

My first attempt at adding fixed-point calculation to my fractal revealed a strange phenomenon:

Posted in Math, Programming | Tagged | 1 Comment

Mathy CAPTCHA

Posted on October 27, 2011 by ejrh

I was confronted with this CAPTCHA today:

Posted in Math, Reflections | Tagged , | Leave a comment

Low-level priority queue optimisations

Posted on October 15, 2011 by ejrh

Optimising the Fractal’s trace mode by changing the priority queue and enabling SIMD.

Posted in Programming, Science | Tagged , , , , | 2 Comments

Mandelbrot calculation using SIMD

Posted on October 13, 2011 by ejrh

How running two calculations in a single thread can speed up the Fractal by up to 90% (but more likely, 15%…).

Posted in Programming, Science | Tagged , , , | 6 Comments

Tracing a fractal outline

Posted on October 7, 2011 by ejrh

Improvements to and a release of my simple fractal program. I’ve been working on the Mandelbrot fractal program that I made in April.  At the time it drew the fractal by allocating every n‘th pixel to a separate thread.  I’ve … Continue reading →

Posted in Programming, Science | Tagged , , , | 3 Comments

Prolog and the Einstein puzzle

Posted on September 13, 2011 by ejrh

My attempt at solving the “Einstein Puzzle”, seen recently on Reddit’s /r/math.

Posted in Math, Programming | Tagged , | 2 Comments