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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
332,931 301,558 24% 43% 23% 10% 37,989 94% 3% 2% 1%
- Simulation Users 5
12,290 4,592 47% 27% 16% 10% 4,844 92% 4% 1% 3%
- Interactive Users 6
77,115 70,244 29% 42% 19% 9% 12,909 97% 2% 1% 0%
- Download Users 7
279,505 272,629 25% 42% 23% 11% 30,351 95% 3% 2% 0%
Total Users (old defn) 8
89,442 - - - - - - - - - -
Table 2: Simulation Usage
Simulation Users 5 12,290 users
Simulation Runs 783,129 jobs
Total CPU Time 15,997 days  
Total Wall Time 49,895 days  
Total Interaction Time 9,235 days  
Users with > 10 mins of CPU Time 4,438 users  
Avg. Number of Simulation Runs/User 64 jobs  
Avg. Time between First and Last Simulation 10,219 days  
Repeat Users with > 10 Simulation Jobs 6,097 users  
Repeat Users with > 3 Months 9 3,370 users  
Table 3: Miscellaneous Statistics
Domains Served 20,707
Cummulative Interactive User Sessions 10 324,074
Cummulative Session Time 14,793 days
Visitors 11 732,114
Visits 12 2,675,241
New Accounts 14,295
Max User Logins 1000 users on 2014-02-19
Web Server Hits 110,881,946
Table 4: Collaboration Usage
Shared Tool Sessions 13 207
New tools under development 56
Table 5: User statistics by registered/unregistered
Users Totals Residence Organization
Identified US Asia Europe Other Identified Edu. Ind. Gov. Other
Total Users 1
332,931 301,558 24% 43% 23% 10% 37,989 94% 3% 2% 1%
- Registered Users 2
29,876 6,949 47% 28% 16% 9% 7,291 89% 6% 1% 4%
- Unregistered Interactive Users 3
49,137 46,055 22% 48% 21% 8% 5,110 96% 2% 2% 0%
- Unregistered Download Users 4
253,918 248,554 24% 42% 23% 11% 25,588 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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