Usage: Usage Tables

Table 1: User statistics
Users Totals Residence Organization
Identified US Asia Europe Other Identified Edu. Ind. Gov. Other
Total Users 1
7,239 3,287 62% 13% 11% 13% 22 86% 0% 5% 9%
- Simulation Users 5
331 20 90% 0% 5% 0% 36 69% 3% 8% 19%
- Interactive Users 6
1,975 995 41% 22% 16% 19% 0 0% 0% 0% 0%
- Download Users 7
5,120 2,464 70% 10% 9% 11% 0 0% 0% 0% 0%
Table 2: Simulation Usage
Simulation Users 5 331 users
Simulation Jobs 7,466 jobs
Total CPU Time 74 days  
Total Wall Time 491 days  
Total Interaction Time 418 days  
Users with > 10 mins of CPU Time 158 users  
Avg. Number of Simulation Jobs/User 23 jobs  
Avg. Time between First and Last Simulation 340 days  
Repeat Users with > 10 Simulation Jobs 133 users  
Repeat Users with > 3 Months 9 109 users  
Table 3: Miscellaneous Statistics
Domains Served 1
Cumulative Interactive User Sessions 10 16,361
Cumulative Session Time 571 days
Visitors 11 59,929
Visits 12 135,890
New Accounts 1,346
Max User Logins 36
Web Server Hits 21,062,171
Table 4: User statistics by registered/unregistered
Users Totals Residence Organization
Identified US Asia Europe Other Identified Edu. Ind. Gov. Other
Total Users 1
7,239 3,287 62% 13% 11% 13% 22 86% 0% 5% 9%
- Registered Users 2
390 8 88% 0% 13% 0% 22 86% 0% 5% 9%
- Unregistered Interactive Users 3
1,765 844 38% 22% 17% 21% 0 0% 0% 0% 0%
- Unregistered Download Users 4
5,084 2,435 70% 10% 9% 11% 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.