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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
321,478 295,808 27% 39% 23% 11% 38,768 95% 3% 2% 1%
- Simulation Users 5
12,366 3,876 46% 29% 16% 9% 4,117 92% 4% 1% 3%
- Interactive Users 6
74,411 74,351 39% 34% 17% 10% 15,474 97% 2% 1% 0%
- Download Users 7
273,818 273,654 27% 38% 23% 11% 32,520 96% 3% 2% 0%
Total Users (old defn) 8
86,816 - - - - - - - - - -
Table 2: Simulation Usage
Simulation Users 5 12,366 users
Simulation Jobs 735,422 jobs
Total CPU Time 25,436 days  
Total Wall Time 51,321 days  
Total Interaction Time 8,295 days  
Users with > 10 mins of CPU Time 4,633 users  
Avg. Number of Simulation Jobs/User 59 jobs  
Avg. Time between First and Last Simulation 304 days  
Repeat Users with > 10 Simulation Jobs 6,240 users  
Repeat Users with > 3 Months 9 3,297 users  
Table 3: Miscellaneous Statistics
Domains Served 19,567
Cummulative Interactive User Sessions 10 218,183
Cummulative Session Time 10,288 days
Visitors 11 695,146
Visits 12 2,083,249
New Accounts 15,364
Max User Logins 1072 users on 2015-01-21
Web Server Hits 110,105,612
Table 4: Collaboration Usage
Shared Tool Sessions 13 209
New tools under development 51
Table 5: User statistics by registered/unregistered
Users Totals Residence Organization
Identified US Asia Europe Other Identified Edu. Ind. Gov. Other
Total Users 1
321,478 295,808 27% 39% 23% 11% 38,768 95% 3% 2% 1%
- Registered Users 2
31,532 6,052 48% 28% 15% 9% 6,404 91% 5% 1% 3%
- Unregistered Interactive Users 3
43,758 43,713 30% 41% 20% 9% 5,756 96% 2% 2% 0%
- Unregistered Download Users 4
246,188 246,043 26% 39% 24% 12% 26,608 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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