Technologies for use in caving with Speleogroup,
including high-power Light-Emitting Diodes (LEDs) and designing efficient circuits for driving them and testing them; also cave
surveying equipment and technologies (dead reckoning and surface
Photography, including underground and 3D photography. A few of
my stereo and panoramic photographs can be
found here. I now only use cameras
with viewfinders, and much prefer the small and lightweight (Canon
Ixus 100IS, Panasonic LF1, Panasonic GM5).
Bicycling science (I have recently taken up regular cycling again,
after a 40-year gap); I currently ride a Charge Mixer with 11-speed
Tollos – a supervisor program
for ARM Cortex microcontrollers which I am developing as a base for
my experimental avionics and
low-power caving aids; you can run it on the mbed
and also many other devices, such as those from STM.
Lightweight (preferably solid-state) computers (one such is the
IBM Workpad, for which
I wrote Palm Globe; another is
the Acorn System 1 and the Emulator I wrote for that); I currently carry an Asus Eee PC 900
netbook (to which I added a fast SATA 32GB solid-state drive) and
(rarely now) a Lenovo Thinkpad X200s laptop. Since 2012 I have been
experimenting with Android devices (programming the Nexus 7 and various
Android ’phones). My current favourite is the Sony Xperia Active,
which doubles as an excellent bicycle computer.
PMGlobe; a programmable World
Globe that lets you see the world from afar, either from a fixed
viewpoint or turning with the sun (you can add your own places of
interest, measure distance, use macros, etc.); this predates Google
Earth by a decade or two – it was originally written for OS/2.
Vision and colour perception (hence the shading algorithms used
in PMGlobe and Palm Globe).
Cognitive processes, including neural, genetic, and evolutionary
algorithms and systems, especially empirical models that may give
insight into thought processes.