When I was younger, I often had dreams when I was asleep in which I raised my arms and flew effortlessly across the landscape. I had the opportunity to have a similar experience while awake when I was in Taiwan earlier this year. I am fairly frequent visitor to Taiwan [see ‘‘Crash’ in Taipei: an engineer’s travelogue‘ on November 19th, 2014 and ‘Citizens of the world‘ on November 27th, 2019]. I often go with colleagues from the UK who have not been before and almost without fail we visit the amazing National Palace Museum. On my last visit in January [see: ‘Ancient standards‘ on January 29th, 2020] there was an exciting blend of art and technology in an exhibit that allowed the visitor to fly through the landscape of a painting. I stood in front of a projection of the picture on a large screen and lifted my arms for a moment to allow the computer system to register my position before starting to fly into the picture, tilting left or right to turn, and lowering and raising my arms to slow down or speed up. Although there was no mask or headphones to wear, the experience was absorbing and realistic. You can watch me flying with my ‘jetpack’ in this video.
I have been involved in the creation of a European pre-standard for the validation of computational models used to predict the structural performance of engineering systems [see ‘Setting Standards‘ on January 24th, 2014]; so, an example of a two thousand year old standard in the National Palace Museum in Taipei particularly attracted my interest during a recent visit to Taiwan. A Jia-liang is a standard measure from the Xin Dynasty dated to between 9 and 24 CE. It is an early form of standard weights and measure issued by the Chinese emperor. The main cylinder contains a volume known as a ‘hu’; however, if you flip it over there is a small cylinder that contains a ‘dou’ which is one tenth of a ‘hu’. The object that looks like a handle on the right in the photograph is third cylinder that holds a ‘sheng’ which is one tenth of a ‘dou’ or one hundredth of a ‘hu’; and the handle on the left contains a ‘ge’ when it is as shown in the photograph and a ‘yue’ when the other way up. A ‘ge’ is tenth of ‘sheng’ and a ‘yeu’ is a twentieth. The Jia-liang was made of bronze with all of the information engraved on it and was used to measure grain across the Xin empire.