[HN Gopher] Scale-Free Vertical Tracking Microscopy, a.k.a. Grav...
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Scale-Free Vertical Tracking Microscopy, a.k.a. Gravity Machine
Author : sohkamyung
Score : 31 points
Date : 2020-08-20 05:30 UTC (17 hours ago)
(HTM) web link (gravitymachine.org)
(TXT) w3m dump (gravitymachine.org)
| lmilcin wrote:
| There is one problem, though.
|
| The water column the microorganism travels is not uniform and
| endless. As it travels, the conditions change. Some can be easily
| adjusted (for example lighting), some would be much more
| difficult to get (pressure, chemical composition).
|
| So while the microorganism can travel it can't actually get
| anywhere.
| ISL wrote:
| True, but if you want to do microscopy on a moving subject for
| even a few seconds, a little treadmill will make a big
| difference!
| cjhveal wrote:
| I'm probably just misunderstanding the physics involved, but
| wouldn't moving the container only impart movement on the fluid
| inside in proportion to the viscosity of the liquid? And once the
| fluid is moving wouldn't stopping it require movement in the
| opposite direction or waiting for friction to reduce the inertia
| of the fluid?
|
| I'm thinking of the behavior of the semicircular canals of the
| ear, and how the inertia of the endolymph can cause dizziness
| after spinning for a while.
|
| Maybe the critical part I'm missing is that the organism is
| actually sinking in the fluid around it and the effect of fluid
| current if present is minimal compared to the effect of gravity.
|
| As an aside, the homepage for this project is quite nicely
| illustrated.
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(page generated 2020-08-20 23:00 UTC)