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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
306,535 276,994 24% 42% 23% 10% 35,504 94% 3% 2% 1%
- Simulation Users 5
11,417 4,271 47% 27% 16% 10% 4,510 92% 4% 1% 3%
- Interactive Users 6
72,180 65,662 30% 42% 19% 9% 12,399 97% 2% 1% 0%
- Download Users 7
256,462 249,940 25% 41% 23% 11% 28,382 95% 3% 2% 0%
Total Users (old defn) 8
83,628 - - - - - - - - - -
Table 2: Simulation Usage
Simulation Users 5 11,417 users
Simulation Runs 756,629 jobs
Total CPU Time 13,885 days  
Total Wall Time 34,138 days  
Total Interaction Time 8,547 days  
Users with > 10 mins of CPU Time 4,057 users  
Avg. Number of Simulation Runs/User 66 jobs  
Avg. Time between First and Last Simulation 10,985 days  
Repeat Users with > 10 Simulation Jobs 5,776 users  
Repeat Users with > 3 Months 9 3,055 users  
Table 3: Miscellaneous Statistics
Domains Served 19,891
Cummulative Interactive User Sessions 10 309,772
Cummulative Session Time 13,913 days
Visitors 11 683,500
Visits 12 2,508,486
New Accounts 13,570
Max User Logins 1000 users on 2014-02-19
Web Server Hits 103,584,086
Table 4: Collaboration Usage
Shared Tool Sessions 13 207
New tools under development 49
Table 5: User statistics by registered/unregistered
Users Totals Residence Organization
Identified US Asia Europe Other Identified Edu. Ind. Gov. Other
Total Users 1
306,535 276,994 24% 42% 23% 10% 35,504 94% 3% 2% 1%
- Registered Users 2
27,963 6,492 46% 28% 17% 10% 6,807 89% 6% 1% 4%
- Unregistered Interactive Users 3
46,010 43,055 22% 48% 21% 8% 4,862 96% 2% 2% 0%
- Unregistered Download Users 4
232,562 227,447 24% 42% 23% 11% 23,835 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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