Usage: Usage Tables

Table 1: User statistics
Users Totals Residence Organization
Identified US Asia Europe Other Identified Edu. Ind. Gov. Other
Total Users 1
13,788 9,436 61% 15% 13% 9% 374 86% 1% 9% 4%
- Simulation Users 5
508 24 96% 0% 0% 0% 48 69% 2% 10% 19%
- Interactive Users 6
4,828 4,188 41% 36% 14% 6% 243 95% 0% 5% 0%
- Download Users 7
8,380 7,361 65% 13% 11% 10% 60 90% 0% 10% 0%
Table 2: Simulation Usage
Simulation Users 5 508 users
Simulation Jobs 16,118 jobs
Total CPU Time 136 days  
Total Wall Time 1,216 days  
Total Interaction Time 315 days  
Users with > 10 mins of CPU Time 138 users  
Avg. Number of Simulation Jobs/User 32 jobs  
Avg. Time between First and Last Simulation 223 days  
Repeat Users with > 10 Simulation Jobs 168 users  
Repeat Users with > 3 Months 9 107 users  
Table 3: Miscellaneous Statistics
Domains Served 5,565
Cumulative Interactive User Sessions 10 17,554
Cumulative Session Time 1,356 days
Visitors 11 110,840
Visits 12 244,207
New Accounts 2,545
Max User Logins 69 users on 2019-04-15
Web Server Hits 12,965,152
Table 4: User statistics by registered/unregistered
Users Totals Residence Organization
Identified US Asia Europe Other Identified Edu. Ind. Gov. Other
Total Users 1
13,788 9,436 61% 15% 13% 9% 374 86% 1% 9% 4%
- Registered Users 2
2,977 34 97% 0% 0% 0% 58 62% 3% 9% 26%
- Unregistered Interactive Users 3
2,638 2,243 47% 22% 21% 6% 104 94% 1% 5% 0%
- Unregistered Download Users 4
8,173 7,159 65% 13% 10% 10% 212 89% 0% 11% 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.