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Joe Desbonnet
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The first person to describe an Inertial Measurement Unit (IMU)
Navigation equipment from the NASA Apollo space program. The spherical shaped device is the IMU. While reading an interest book recently ("Inventing Accuracy - A Historical Sociology of Nuclear Missile Guidance" [1]) I came across an interesting bit of hist...

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DeLonghi Cafe Treviso (BAR14F-E) Repair
In the last week my low cost coffee machine (DeLonghi Cafe Treviso BAR14F-E) clogged up. Turns out (as I suspected) it was a build up of limescale.  I’m writing this short blog post to aid anyone else who might have the same problem. I suspect many applianc...

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For reasons that defy rational explanation I've been firing ultrasound ranging pulses off various bits and bobs. I thought being able to simulate this stuff might be handy. This is a  simulation of an acoustic pulse impinging on 4 different targets varying in size from less than the impulse wavelength to much greater than the wavelength, illustrating scatter (small target) vs specular reflection (large target). I'm using k-wave.org toolkit for this.
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