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Home › Usage › Overview › Prior 12 Months

Usage: Overview

Table 1: User statistics
Users Totals Residence Organization
Identified US Asia Europe Other Identified Edu. Ind. Gov. Other
Total Users 1
319,181 285,379 25% 41% 23% 10% 37,946 95% 3% 2% 1%
- Simulation Users 5
12,357 4,433 46% 28% 16% 9% 4,685 92% 4% 1% 3%
- Interactive Users 6
76,628 68,792 31% 41% 19% 9% 14,311 97% 2% 1% 0%
- Download Users 7
264,690 256,500 25% 40% 24% 11% 29,878 95% 3% 2% 0%
Total Users (old defn) 8
89,015 - - - - - - - - - -
Table 2: Simulation Usage
Simulation Users 5 12,357 users
Simulation Jobs 860,542 jobs
Total CPU Time 16,804 days  
Total Wall Time 39,667 days  
Total Interaction Time 8,611 days  
Users with > 10 mins of CPU Time 4,525 users  
Avg. Number of Simulation Jobs/User 70 jobs  
Avg. Time between First and Last Simulation 310 days  
Repeat Users with > 10 Simulation Jobs 6,093 users  
Repeat Users with > 3 Months 9 3,307 users  
Table 3: Miscellaneous Statistics
Domains Served 20,863
Cummulative Interactive User Sessions 10 320,031
Cummulative Session Time 14,582 days
Visitors 11 726,129
Visits 12 2,602,786
New Accounts 14,918
Max User Logins 1072 users on 2015-01-21
Web Server Hits 112,758,757
Table 4: Collaboration Usage
Shared Tool Sessions 13 231
New tools under development 34
Table 5: User statistics by registered/unregistered
Users Totals Residence Organization
Identified US Asia Europe Other Identified Edu. Ind. Gov. Other
Total Users 1
319,181 285,379 25% 41% 23% 10% 37,946 95% 3% 2% 1%
- Registered Users 2
30,847 7,021 48% 28% 16% 9% 7,385 90% 5% 1% 3%
- Unregistered Interactive Users 3
48,311 44,857 23% 47% 22% 8% 5,515 96% 2% 2% 0%
- Unregistered Download Users 4
240,023 233,501 25% 41% 24% 11% 25,046 95% 3% 2% 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.

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