Usage: Usage Tables

Table 1: User statistics
Users Totals Residence Organization
Identified US Asia Europe Other Identified Edu. Ind. Gov. Other
Total Users 1
11,795 8,784 61% 15% 12% 10% 66 77% 2% 12% 9%
- Simulation Users 5
375 16 88% 0% 13% 0% 33 79% 0% 3% 18%
- Interactive Users 6
2,658 2,225 42% 26% 20% 10% 21 100% 0% 0% 0%
- Download Users 7
8,616 7,047 67% 12% 10% 10% 14 100% 0% 0% 0%
Table 2: Simulation Usage
Simulation Users 5 375 users
Simulation Jobs 9,033 jobs
Total CPU Time 692 days  
Total Wall Time 798 days  
Total Interaction Time 311 days  
Users with > 10 mins of CPU Time 209 users  
Avg. Number of Simulation Jobs/User 24 jobs  
Avg. Time between First and Last Simulation 323 days  
Repeat Users with > 10 Simulation Jobs 140 users  
Repeat Users with > 3 Months 9 107 users  
Table 3: Miscellaneous Statistics
Domains Served 2,454
Cumulative Interactive User Sessions 10 26,614
Cumulative Session Time 918 days
Visitors 11 99,424
Visits 12 208,953
New Accounts 1,341
Max User Logins 41
Web Server Hits 35,307,040
Table 4: User statistics by registered/unregistered
Users Totals Residence Organization
Identified US Asia Europe Other Identified Edu. Ind. Gov. Other
Total Users 1
11,795 8,784 61% 15% 12% 10% 66 77% 2% 12% 9%
- Registered Users 2
1,049 16 94% 0% 6% 0% 33 76% 0% 6% 18%
- Unregistered Interactive Users 3
2,228 1,817 40% 25% 22% 11% 10 90% 0% 10% 0%
- Unregistered Download Users 4
8,518 6,951 67% 12% 10% 10% 23 74% 4% 22% 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.