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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
328,921 298,604 25% 42% 22% 11% 38,876 94% 3% 2% 1%
- Simulation Users 5
12,543 4,821 48% 27% 16% 10% 5,109 92% 4% 1% 3%
- Interactive Users 6
73,868 67,101 31% 41% 19% 10% 12,291 97% 2% 1% 0%
- Download Users 7
279,393 273,191 26% 41% 23% 11% 31,190 95% 3% 2% 0%
Total Users (old defn) 8
86,460 - - - - - - - - - -
Table 2: Simulation Usage
Simulation Users 5 12,543 users
Simulation Runs 816,168 jobs
Total CPU Time 16,786 days  
Total Wall Time 49,055 days  
Total Interaction Time 8,993 days  
Users with > 10 mins of CPU Time 4,769 users  
Avg. Number of Simulation Runs/User 65 jobs  
Avg. Time between First and Last Simulation 11,007 days  
Repeat Users with > 10 Simulation Jobs 6,560 users  
Repeat Users with > 3 Months 9 3,397 users  
Table 3: Miscellaneous Statistics
Domains Served 20,224
Cummulative Interactive User Sessions 10 308,265
Cummulative Session Time 14,109 days
Visitors 11 712,139
Visits 12 2,528,977
New Accounts 14,404
Max User Logins 1000 users on 2014-02-19
Web Server Hits 109,318,451
Table 4: Collaboration Usage
Shared Tool Sessions 13 191
New tools under development 52
Table 5: User statistics by registered/unregistered
Users Totals Residence Organization
Identified US Asia Europe Other Identified Edu. Ind. Gov. Other
Total Users 1
328,921 298,604 25% 42% 22% 11% 38,876 94% 3% 2% 1%
- Registered Users 2
30,106 7,206 47% 28% 16% 9% 7,598 89% 6% 1% 4%
- Unregistered Interactive Users 3
45,045 42,230 23% 47% 21% 9% 4,887 95% 3% 2% 0%
- Unregistered Download Users 4
253,770 249,168 25% 42% 23% 11% 26,391 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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