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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
63,021 54,193 30% 37% 24% 9% 9,391 94% 4% 2% 1%
- Simulation Users 5
3,253 1,239 49% 29% 14% 8% 1,298 94% 3% 1% 2%
- Interactive Users 6
14,561 12,466 41% 32% 19% 8% 3,663 97% 2% 1% 0%
- Download Users 7
51,274 48,931 29% 37% 25% 9% 6,598 95% 3% 2% 0%
Total Users (old defn) 8
17,796 - - - - - - - - - -
Table 2: Simulation Usage
Simulation Users 5 3,253 users
Simulation Jobs 132,692 jobs
Total CPU Time 5,215 days  
Total Wall Time 6,588 days  
Total Interaction Time 1,305 days  
Users with > 10 mins of CPU Time 1,046 users  
Avg. Number of Simulation Jobs/User 41 jobs  
Avg. Time between First and Last Simulation 332 days  
Repeat Users with > 10 Simulation Jobs 1,431 users  
Repeat Users with > 3 Months 9 940 users  
Table 3: Miscellaneous Statistics
Domains Served 7,488
Cummulative Interactive User Sessions 10 31,466
Cummulative Session Time 1,485 days
Visitors 11 140,894
Visits 12 318,069
New Accounts 4,271
Max User Logins 1072 users on 2015-01-21
Web Server Hits 17,149,106
Table 4: Collaboration Usage
Shared Tool Sessions 13 27
New tools under development 5
Table 5: User statistics by registered/unregistered
Users Totals Residence Organization
Identified US Asia Europe Other Identified Edu. Ind. Gov. Other
Total Users 1
63,021 54,193 30% 37% 24% 9% 9,391 94% 4% 2% 1%
- Registered Users 2
8,440 2,409 54% 27% 13% 7% 2,527 93% 4% 1% 2%
- Unregistered Interactive Users 3
8,185 7,344 31% 39% 22% 8% 1,279 95% 3% 2% 0%
- Unregistered Download Users 4
46,396 44,440 29% 37% 25% 9% 5,585 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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