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Break Clean-Up/Positioning for rest of semester","description":"- finalize catheter testing procedures (temperature, pre-testing environment/procedure)\r\n- order optical encoder\r\n- primary encoder strip holder designs\r\n- begin initialization of the raspberry pi\r\n","creator":{"login":"kmc97","id":32279493,"avatar_url":"https://avatars1.githubusercontent.com/u/32279493?v=4","gravatar_id":"","url":"https://api.github.com/users/kmc97","html_url":"https://github.com/kmc97","followers_url":"https://api.github.com/users/kmc97/followers","following_url":"https://api.github.com/users/kmc97/following{/other_user}","gists_url":"https://api.github.com/users/kmc97/gists{/gist_id}","starred_url":"https://api.github.com/users/kmc97/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/kmc97/subscriptions","organizations_url":"https://api.github.com/users/kmc97/orgs","repos_url":"https://api.github.com/users/kmc97/repos","events_url":"https://api.github.com/users/kmc97/events{/privacy}","received_events_url":"https://api.github.com/users/kmc97/received_events","type":"User","site_admin":false},"open_issues":4,"closed_issues":0,"state":"open","created_at":"2018-03-05T21:31:51Z","updated_at":"2018-03-05T21:37:04Z","due_on":"2018-03-12T07:00:00Z","closed_at":null},"comments":3,"created_at":"2018-03-01T18:59:49Z","updated_at":"2018-03-10T22:10:34Z","closed_at":null,"author_association":"COLLABORATOR","body":"Per our discussion with Matt/Andy from Millar yesterday, some things we can try to test what might be causing drift: \r\n- allowing catheter to power up for 30 minutes before taking readings\r\n- trying to supply catheter with less power than 5V (internal circuit might be heating up)\r\n- observing catheter in water vs air (more stable)\r\n\r\nWe should also record the drift we are observing over time. \r\nWhen does it start to drift? What is the relationship with drift and time? Magnitude of drift? \r\n\r\n"},"comment":{"url":"https://api.github.com/repos/Duke-BME-Design/Ureter/issues/comments/372071195","html_url":"https://github.com/Duke-BME-Design/Ureter/issues/29#issuecomment-372071195","issue_url":"https://api.github.com/repos/Duke-BME-Design/Ureter/issues/29","id":372071195,"user":{"login":"yashasaxena","id":8584289,"avatar_url":"https://avatars1.githubusercontent.com/u/8584289?v=4","gravatar_id":"","url":"https://api.github.com/users/yashasaxena","html_url":"https://github.com/yashasaxena","followers_url":"https://api.github.com/users/yashasaxena/followers","following_url":"https://api.github.com/users/yashasaxena/following{/other_user}","gists_url":"https://api.github.com/users/yashasaxena/gists{/gist_id}","starred_url":"https://api.github.com/users/yashasaxena/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/yashasaxena/subscriptions","organizations_url":"https://api.github.com/users/yashasaxena/orgs","repos_url":"https://api.github.com/users/yashasaxena/repos","events_url":"https://api.github.com/users/yashasaxena/events{/privacy}","received_events_url":"https://api.github.com/users/yashasaxena/received_events","type":"User","site_admin":false},"created_at":"2018-03-10T22:10:34Z","updated_at":"2018-03-10T22:10:34Z","author_association":"COLLABORATOR","body":"Deepti and I put it in a water bottle filled with RT water. \r\n\r\nReadings at first glance look A LOT more stable. \r\n- Voltage change from inserting catheter deeper into the water shows a lot greater difference\r\n- Water seems to be a steadier environment because we don't see as many fluctuations\r\n- Plot of inserting catheter in U-tube manometer from a 0 mm Hg point to a 5 mm Hg point:\r\n![manualcatheterinwater](https://user-images.githubusercontent.com/8584289/37247188-9aa1594a-2485-11e8-9e5e-b582c67090cc.png)\r\nNotes about chart: \r\n(after 25 secs the catheter was kept constant at 5 mm Hg)\r\nx-axis: time in seconds\r\ny-axis: voltage reading from arduino in Volts\r\nJumps are associated with Deepti moving the cather over a delta of 1 mm Hg and pausing\r\nAfter 2 mm Hg, there was a 1 V jump. The lower pressure values have a much more gradual increase as seen from 0 to 10 seconds. \r\n\r\n"}}
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