Usage: Usage Tables

Table 1: User statistics
Users Totals Residence Organization
Identified US Asia Europe Other Identified Edu. Ind. Gov. Other
Total Users 1
1,853 780 24% 31% 33% 7% 50 90% 6% 0% 4%
- Simulation Users 5
39 14 78% 7% 7% 7% 14 92% 0% 0% 7%
- Interactive Users 6
1,039 846 21% 45% 24% 6% 17 100% 0% 0% 0%
- Download Users 7
212 192 24% 39% 28% 5% 2 100% 0% 0% 0%
Table 2: Simulation Usage
Simulation Users 5 39 users
Simulation Jobs 756 jobs
Total CPU Time 73 days  
Total Wall Time 417 days  
Total Interaction Time 78 days  
Users with > 10 mins of CPU Time 17 users  
Avg. Number of Simulation Jobs/User 19 jobs  
Avg. Time between First and Last Simulation 775 days  
Repeat Users with > 10 Simulation Jobs 14 users  
Repeat Users with > 3 Months 9 17 users  
Table 3: Miscellaneous Statistics
Domains Served 2,552
Cumulative Interactive User Sessions 10 3,448
Cumulative Session Time 1,064 days
Visitors 11 22,094
Visits 12 52,504
New Accounts 877
Max User Logins 55
Web Server Hits 8,756,336
Table 4: User statistics by registered/unregistered
Users Totals Residence Organization
Identified US Asia Europe Other Identified Edu. Ind. Gov. Other
Total Users 1
1,853 780 24% 31% 33% 7% 50 90% 6% 0% 4%
- Registered Users 2
945 28 89% 3% 3% 3% 28 89% 3% 0% 7%
- Unregistered Interactive Users 3
710 572 22% 30% 35% 8% 13 84% 15% 0% 0%
- Unregistered Download Users 4
198 180 21% 40% 30% 5% 9 100% 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.