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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
76,195 68,780 24% 42% 24% 10% 9,510 95% 3% 1% 1%
- Simulation Users 5
3,344 1,310 50% 27% 15% 9% 1,359 93% 3% 1% 3%
- Interactive Users 6
18,122 16,368 31% 41% 20% 8% 3,473 97% 2% 1% 0%
- Download Users 7
64,790 62,837 24% 41% 24% 11% 7,255 95% 3% 2% 0%
Total Users (old defn) 8
21,468 - - - - - - - - - -
Table 2: Simulation Usage
Simulation Users 5 3,344 users
Simulation Runs 86,569 jobs
Total CPU Time 2,146 days  
Total Wall Time 4,592 days  
Total Interaction Time 1,360 days  
Users with > 10 mins of CPU Time 1,157 users  
Avg. Number of Simulation Runs/User 26 jobs  
Avg. Time between First and Last Simulation 968 days  
Repeat Users with > 10 Simulation Jobs 1,359 users  
Repeat Users with > 3 Months 9 898 users  
Table 3: Miscellaneous Statistics
Domains Served 8,118
Cummulative Interactive User Sessions 10 49,536
Cummulative Session Time 2,062 days
Visitors 11 167,632
Visits 12 455,018
New Accounts 2,357
Max User Logins 527 users on 2014-11-13
Web Server Hits 19,049,166
Table 4: Collaboration Usage
Shared Tool Sessions 13 30
New tools under development 12
Table 5: User statistics by registered/unregistered
Users Totals Residence Organization
Identified US Asia Europe Other Identified Edu. Ind. Gov. Other
Total Users 1
76,195 68,780 24% 42% 24% 10% 9,510 95% 3% 1% 1%
- Registered Users 2
7,135 2,215 50% 26% 15% 9% 2,291 91% 4% 1% 3%
- Unregistered Interactive Users 3
11,456 10,557 21% 49% 22% 8% 1,315 96% 2% 1% 0%
- Unregistered Download Users 4
57,604 56,008 23% 41% 25% 11% 5,904 96% 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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