Usage: Usage Tables

Table 1: User statistics
Users Totals Residence Organization
Identified US Asia Europe Other Identified Edu. Ind. Gov. Other
Total Users 1
9,233 7,124 58% 16% 14% 11% 29 79% 0% 7% 14%
- Simulation Users 5
339 14 86% 0% 7% 0% 29 79% 3% 7% 10%
- Interactive Users 6
2,431 1,997 40% 25% 18% 14% 0 0% 0% 0% 0%
- Download Users 7
6,396 5,433 64% 13% 12% 10% 0 0% 0% 0% 0%
Table 2: Simulation Usage
Simulation Users 5 339 users
Simulation Jobs 6,804 jobs
Total CPU Time 679 days  
Total Wall Time 497 days  
Total Interaction Time 379 days  
Users with > 10 mins of CPU Time 197 users  
Avg. Number of Simulation Jobs/User 20 jobs  
Avg. Time between First and Last Simulation 301 days  
Repeat Users with > 10 Simulation Jobs 127 users  
Repeat Users with > 3 Months 9 98 users  
Table 3: Miscellaneous Statistics
Domains Served 1
Cumulative Interactive User Sessions 10 26,117
Cumulative Session Time 863 days
Visitors 11 79,388
Visits 12 184,766
New Accounts 1,332
Max User Logins 36
Web Server Hits 27,748,774
Table 4: User statistics by registered/unregistered
Users Totals Residence Organization
Identified US Asia Europe Other Identified Edu. Ind. Gov. Other
Total Users 1
9,233 7,124 58% 16% 14% 11% 29 79% 0% 7% 14%
- Registered Users 2
867 14 93% 0% 7% 0% 29 79% 0% 7% 14%
- Unregistered Interactive Users 3
2,033 1,726 39% 25% 19% 15% 0 0% 0% 0% 0%
- Unregistered Download Users 4
6,333 5,384 64% 13% 12% 10% 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.