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Usage: Overview

Table 1: User statistics
Users Totals Residence Organization
Identified US Asia Europe Other Identified Edu. Ind. Gov. Other
Total Users 1
3,612 2,905 16% 56% 17% 9% 219 81% 4% 3% 12%
- Simulation Users 5
7 0 0% 0% 0% 0% 1 100% 0% 0% 0%
- Interactive Users 6
2,070 1,815 8% 72% 15% 5% 3 33% 0% 67% 0%
- Download Users 7
1,550 1,233 28% 31% 19% 17% 5 80% 0% 20% 0%
Table 2: Simulation Usage
Simulation Users 5 7 users
Simulation Runs 383 jobs
Total CPU Time 2 hours  
Total Wall Time 19 days  
Total Interaction Time 17 days  
Users with > 10 mins of CPU Time 1 users  
Avg. Number of Simulation Runs/User 55 jobs  
Avg. Time between First and Last Simulation 432 days  
Repeat Users with > 10 Simulation Jobs 5 users  
Repeat Users with > 3 Months 9 5 users  
Table 3: Miscellaneous Statistics
Domains Served 2,125
Cummulative Interactive User Sessions 10 7,949
Cummulative Session Time 829 days
Visitors 11 31,993
Visits 12 109,269
New Accounts 224
Max User Logins 7 users on 2014-03-27
Web Server Hits 1,978,248
Table 4: User statistics by registered/unregistered
Users Totals Residence Organization
Identified US Asia Europe Other Identified Edu. Ind. Gov. Other
Total Users 1
3,612 2,905 16% 56% 17% 9% 219 81% 4% 3% 12%
- Registered Users 2
138 1 0% 0% 0% 100% 116 66% 7% 5% 22%
- Unregistered Interactive Users 3
1,943 1,690 8% 74% 15% 3% 14 100% 0% 0% 0%
- Unregistered Download Users 4
1,531 1,214 28% 31% 19% 17% 89 98% 1% 1% 0%

  1. Sum of Registered Users2, Unregistered Interactive Users3 and Unregistered Download Users4
  2. Number of Users that logged in. User registration assigns a unique login to each individual user.
  3. Number of Unregistered Users, identified by unique hosts/IPs, that had an active Session 10 without logging in. Does not include known web bots/crawlers.
  4. Number of Unregistered users, identified by unique hosts/IPs, that had an active session of less than 15 minutes without logging in and downloaded a non-interactive resource such as PDF or podcast. Does not include web bots/crawlers.
  5. Number of Registered Users2 that ran one or more simulation runs.
  6. All Unregistered Users, identified by unique hosts/IPs, that had an active Session 10. Does not include known web bots/crawlers.
  7. All Unregistered users, identified by unique hosts/IPs that downloaded a non-interactive resource such as PDF or podcast. Does not include known web bots/crawlers.
  8. Sum of Simulation Users 5 + Unregistered Interactive Users 3 including web bots/crawlers.
  9. Number of Simulation users that returned after a gap of 3 months.
  10. Begins when an IP is active on the site for at least 15 minutes. Ends when inactive for more than 30 minutes, including time spent viewing videos.
  11. Identified by a unique IP address / hostname.
  12. Based on MIT OCW metric of Visits: A visit is activity by a unique visitor delimitated by a 30 minute absence from the site on either side of the activity.
    These visits correspond to unique visitors 11. Does not include known web bots/crawlers
  13. Number of Simulation sessions that were shared between 2 or more users.