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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
322,113 297,220 27% 39% 23% 11% 38,836 95% 3% 2% 1%
- Simulation Users 5
12,114 3,996 46% 29% 15% 9% 4,240 92% 4% 1% 3%
- Interactive Users 6
74,798 74,756 39% 35% 17% 9% 15,281 97% 2% 1% 0%
- Download Users 7
274,154 274,031 27% 38% 23% 11% 32,537 96% 3% 2% 0%
Total Users (old defn) 8
86,956 - - - - - - - - - -
Table 2: Simulation Usage
Simulation Users 5 12,114 users
Simulation Jobs 837,433 jobs
Total CPU Time 22,510 days  
Total Wall Time 52,579 days  
Total Interaction Time 8,136 days  
Users with > 10 mins of CPU Time 4,628 users  
Avg. Number of Simulation Jobs/User 69 jobs  
Avg. Time between First and Last Simulation 315 days  
Repeat Users with > 10 Simulation Jobs 6,236 users  
Repeat Users with > 3 Months 9 3,314 users  
Table 3: Miscellaneous Statistics
Domains Served 19,636
Cummulative Interactive User Sessions 10 223,920
Cummulative Session Time 10,668 days
Visitors 11 698,685
Visits 12 2,116,974
New Accounts 15,318
Max User Logins 1072 users on 2015-01-21
Web Server Hits 110,997,063
Table 4: Collaboration Usage
Shared Tool Sessions 13 226
New tools under development 57
Table 5: User statistics by registered/unregistered
Users Totals Residence Organization
Identified US Asia Europe Other Identified Edu. Ind. Gov. Other
Total Users 1
322,113 297,220 27% 39% 23% 11% 38,836 95% 3% 2% 1%
- Registered Users 2
31,005 6,257 48% 28% 15% 9% 6,606 91% 5% 1% 3%
- Unregistered Interactive Users 3
44,667 44,633 29% 42% 19% 9% 5,672 96% 2% 2% 0%
- Unregistered Download Users 4
246,441 246,330 26% 39% 24% 12% 26,558 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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