In the 1980s people in chemistry labs that needed to find the area beneath a curve used to print/plot the curve, cut out the area and weigh it. This worked quite well as they had accurate scales.
Ha! Very interesting. And the density of paper was uniform enough? Or maybe they used a different material?
Vladimir Lukyanov's hydraulic computer
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Re: Vladimir Lukyanov's hydraulic computer
#32Re: Vladimir Lukyanov's hydraulic computer
#33http://myst5.com/images/mystgallery/channel_2.jpg https://lparchive.org/Myst/Update%2015/3-1103_Switchflip.gif
Re: Vladimir Lukyanov's hydraulic computer
#34In the 1980s people in chemistry labs that needed to find the area beneath a curve used to print/plot the curve, cut out the area and weigh it. This worked quite well as they had accurate scales.
Re: Vladimir Lukyanov's hydraulic computer
#35In the 1980s people in chemistry labs that needed to find the area beneath a curve used to print/plot the curve, cut out the area and weigh it. This worked quite well as they had accurate scales.
If they had a plot of the function in a digital format that could be printed what stopped them from doing numerical integration?
Re: Vladimir Lukyanov's hydraulic computer
#36In the 1980s people in chemistry labs that needed to find the area beneath a curve used to print/plot the curve, cut out the area and weigh it. This worked quite well as they had accurate scales.
There was one experiment in physics lab course (undergraduate level) just ten years ago in which we also had to integrate like this. Not because we lacked better methods but to have experienced that it can be done this way.
Re: Vladimir Lukyanov's hydraulic computer
#37Earlier quoted context omitted.
If they had a plot of the function in a digital format that could be printed what stopped them from doing numerical integration?
It was not invented yet, the "Mathematical Model for the Determination of Total Area Under Glucose Tolerance and Other Metabolic Curves" paper came out in 1994... https://fliptomato.wordpress.com/2007/03/19/medical-research...
Funny anecdote, serves as a reminder to not take all academic literature as gospel.
Re: Vladimir Lukyanov's hydraulic computer
#38Earlier quoted context omitted.
If they had a plot of the function in a digital format that could be printed what stopped them from doing numerical integration?
It was not invented yet, the "Mathematical Model for the Determination of Total Area Under Glucose Tolerance and Other Metabolic Curves" paper came out in 1994... https://fliptomato.wordpress.com/2007/03/19/medical-research...
Re: Vladimir Lukyanov's hydraulic computer
#39http://www.lightspeedmagazine.com/fiction/the-bookmaking-hab...