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Usage: Overview

Table 1: User statistics
Users Totals Residence Organization
Identified US Asia Europe Other Identified Edu. Ind. Gov. Other
Total Users 1
241,248 217,818 25% 43% 23% 10% 28,393 94% 3% 2% 1%
- Simulation Users 5
9,378 3,714 47% 27% 16% 10% 3,936 92% 4% 1% 3%
- Interactive Users 6
57,090 52,109 30% 42% 19% 9% 9,643 97% 2% 1% 0%
- Download Users 7
202,054 197,186 25% 42% 23% 11% 22,628 95% 3% 2% 0%
Total Users (old defn) 8
66,498 - - - - - - - - - -
Table 2: Simulation Usage
Simulation Users 5 9,378 users
Simulation Runs 666,340 jobs
Total CPU Time 11,637 days  
Total Wall Time 28,339 days  
Total Interaction Time 6,993 days  
Users with > 10 mins of CPU Time 3,267 users  
Avg. Number of Simulation Runs/User 71 jobs  
Avg. Time between First and Last Simulation 14,663 days  
Repeat Users with > 10 Simulation Jobs 4,899 users  
Repeat Users with > 3 Months 9 2,679 users  
Table 3: Miscellaneous Statistics
Domains Served 17,533
Cummulative Interactive User Sessions 10 260,230
Cummulative Session Time 11,718 days
Visitors 11 553,114
Visits 12 2,053,462
New Accounts 11,202
Max User Logins 1000 users on 2014-02-19
Web Server Hits 84,534,538
Table 4: Collaboration Usage
Shared Tool Sessions 13 178
New tools under development 40
Table 5: User statistics by registered/unregistered
Users Totals Residence Organization
Identified US Asia Europe Other Identified Edu. Ind. Gov. Other
Total Users 1
241,248 217,818 25% 43% 23% 10% 28,393 94% 3% 2% 1%
- Registered Users 2
23,300 5,755 46% 28% 16% 10% 6,055 89% 6% 1% 4%
- Unregistered Interactive Users 3
35,430 33,307 23% 48% 21% 8% 3,605 96% 2% 2% 0%
- Unregistered Download Users 4
182,518 178,756 24% 42% 23% 11% 18,733 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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