the Aravind Eye Hospital Telemedicine Project - Courses
the Aravind Eye Hospital Telemedicine Project - Courses
the Aravind Eye Hospital Telemedicine Project - Courses
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The Things I Thought I’d Never Do<br />
Sonesh Surana<br />
I290: Designing Rural Computing Applications<br />
Guest Lecture<br />
November 4, 2008
Timeline<br />
2004<br />
1 day<br />
2005<br />
107 days<br />
2006<br />
26 days<br />
2008<br />
12 days<br />
Total<br />
146 days<br />
Aug<br />
2004:<br />
1 day<br />
June<br />
2005:<br />
24<br />
days<br />
Dec<br />
2005:<br />
37<br />
days<br />
Oct<br />
2006:<br />
20<br />
days<br />
Jan<br />
2005:<br />
25<br />
days<br />
Aug<br />
2005:<br />
21<br />
days<br />
Feb<br />
2006:<br />
6<br />
days<br />
Jan<br />
2008:<br />
12<br />
days
Photo acknowledgment: Francis Kpobe, Ghana
Tower Challenges?
Training Challenges?
“So <strong>the</strong>n we put <strong>the</strong> separate modem at<br />
chimney now <strong>the</strong> link has been up it means<br />
, in Theni router-3 we put <strong>the</strong> ath1 card and<br />
it is focusing <strong>the</strong> new separate modem at<br />
chimney.<br />
We have pointed out one think ie we put<br />
<strong>the</strong> new wireless card in <strong>the</strong> existing<br />
modem(suppose we put <strong>the</strong> ath1 in , Theni<br />
router-3 , already it connected to SBS<br />
through ath0) <strong>the</strong> link quality will be down).”
Power Challenges?
Poor Quality Power<br />
Voltage Range<br />
Number of Instances seen over 6 weeks<br />
Spikes and Swells:<br />
• Lost 50 power adapters<br />
• Burned 30 PoE ports<br />
Low Voltages:<br />
• Incomplete boots<br />
• HW watchdog fails<br />
Frequent Fluctuations:<br />
• CF corruptions<br />
• Battery Damage<br />
23
What about UPS?<br />
“Affordable” UPS systems ($300) are of standby-type<br />
• Primary source is grid<br />
• Secondary source is battery<br />
• Good quality power supplied only during outage!<br />
24
Real Cost of Power<br />
Assume 7W<br />
Monthly Costs<br />
• Grid: $0.25<br />
• UPS + Battery: $6.08 (24X more!!)<br />
• 50W Panel + Controller + Battery: $8.24<br />
25
Some Results
Operational Results<br />
Migration at <strong>Aravind</strong><br />
TIER, UC Berkeley<br />
<strong>Aravind</strong><br />
Local Vendor<br />
Maintenance<br />
Management<br />
Installation<br />
Equipment Supply<br />
Jan’06 – Jun’06<br />
Jul’06 – Dec’06<br />
Jan’07 – Jun’07<br />
Jun’07 – Dec’07<br />
2007: 5 more clinic links<br />
27
Number of Patients<br />
0<br />
Feb-06<br />
Sep-08<br />
Jan-06<br />
Aug-08<br />
Mar-06<br />
Apr-06<br />
May-06<br />
Jun-06<br />
Jul-06<br />
Aug-06<br />
Sep-06<br />
Oct-06<br />
Nov-06<br />
Dec-06<br />
Jan-07<br />
Feb-07<br />
Mar-07<br />
Apr-07<br />
May-07<br />
Jun-07<br />
Jul-07<br />
Aug-07<br />
Sep-07<br />
Oct-07<br />
Nov-07<br />
Dec-07<br />
Jan-08<br />
Feb-08<br />
Mar-08<br />
Apr-08<br />
May-08<br />
Jun-08<br />
Jul-08<br />
5000<br />
4500<br />
4000<br />
3500<br />
3000<br />
2500<br />
2000<br />
1500<br />
1000<br />
500<br />
Patient Throughput<br />
90,000 patients screened; vision restored for 15,858<br />
Kallidakurchi<br />
Srivaikundam<br />
Sholavandan<br />
Tirupovanam<br />
Alanganallur<br />
Andipatti<br />
Periyakulum<br />
Chinnamanur<br />
Bodi<br />
Ambasamudram<br />
Time in Months (Jan 2006 to September 2008)
Thank<br />
You!
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