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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
45,398 40,616 22% 48% 21% 9% 5,550 92% 5% 3% 1%
- Simulation Users 5
1,899 1,010 47% 31% 13% 9% 1,062 91% 5% 2% 3%
- Interactive Users 6
12,582 11,453 30% 44% 18% 7% 2,191 95% 3% 2% 0%
- Download Users 7
37,342 36,168 22% 47% 21% 10% 3,875 91% 5% 4% 0%
Total Users (old defn) 8
14,487 - - - - - - - - - -
Table 2: Simulation Usage
Simulation Users 5 1,899 users
Simulation Runs 233,325 jobs
Total CPU Time 1,641 days  
Total Wall Time 5,280 days  
Total Interaction Time 977 days  
Users with > 10 mins of CPU Time 595 users  
Avg. Number of Simulation Runs/User 123 jobs  
Avg. Time between First and Last Simulation 33,860 days  
Repeat Users with > 10 Simulation Jobs 1,032 users  
Repeat Users with > 3 Months 9 778 users  
Table 3: Miscellaneous Statistics
Domains Served 6,793
Cummulative Interactive User Sessions 10 123,223
Cummulative Session Time 6,027 days
Visitors 11 122,110
Visits 12 550,392
New Accounts 1,812
Max User Logins 425 users on 2014-08-26
Web Server Hits 24,793,979
Table 4: Collaboration Usage
Shared Tool Sessions 13 72
New tools under development 15
Table 5: User statistics by registered/unregistered
Users Totals Residence Organization
Identified US Asia Europe Other Identified Edu. Ind. Gov. Other
Total Users 1
45,398 40,616 22% 48% 21% 9% 5,550 92% 5% 3% 1%
- Registered Users 2
5,236 1,897 47% 29% 14% 9% 1,996 91% 5% 1% 3%
- Unregistered Interactive Users 3
7,741 7,233 20% 52% 21% 7% 716 94% 3% 2% 0%
- Unregistered Download Users 4
32,421 31,486 20% 48% 21% 10% 2,838 92% 4% 4% 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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