Usage: Usage Tables

Table 1: User statistics
Users Totals Residence Organization
Identified US Asia Europe Other Identified Edu. Ind. Gov. Other
Total Users 1
7,900 6,179 60% 15% 13% 10% 26 85% 0% 8% 8%
- Simulation Users 5
330 17 88% 0% 6% 0% 34 71% 3% 12% 15%
- Interactive Users 6
2,151 1,720 40% 26% 18% 13% 0 0% 0% 0% 0%
- Download Users 7
5,518 4,674 66% 12% 11% 9% 0 0% 0% 0% 0%
Table 2: Simulation Usage
Simulation Users 5 330 users
Simulation Jobs 7,041 jobs
Total CPU Time 640 days  
Total Wall Time 481 days  
Total Interaction Time 405 days  
Users with > 10 mins of CPU Time 168 users  
Avg. Number of Simulation Jobs/User 21 jobs  
Avg. Time between First and Last Simulation 322 days  
Repeat Users with > 10 Simulation Jobs 125 users  
Repeat Users with > 3 Months 9 105 users  
Table 3: Miscellaneous Statistics
Domains Served 1
Cumulative Interactive User Sessions 10 20,047
Cumulative Session Time 722 days
Visitors 11 67,351
Visits 12 156,076
New Accounts 1,323
Max User Logins 36
Web Server Hits 23,605,888
Table 4: User statistics by registered/unregistered
Users Totals Residence Organization
Identified US Asia Europe Other Identified Edu. Ind. Gov. Other
Total Users 1
7,900 6,179 60% 15% 13% 10% 26 85% 0% 8% 8%
- Registered Users 2
543 11 91% 0% 9% 0% 26 85% 0% 8% 8%
- Unregistered Interactive Users 3
1,884 1,532 39% 26% 19% 15% 0 0% 0% 0% 0%
- Unregistered Download Users 4
5,473 4,636 66% 12% 11% 9% 0 0% 0% 0% 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.