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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
24,527 21,854 23% 49% 18% 10% 3,146 92% 5% 2% 1%
- Simulation Users 5
1,115 635 50% 30% 10% 10% 675 91% 5% 1% 3%
- Interactive Users 6
6,806 6,199 32% 45% 16% 8% 1,206 94% 4% 2% 0%
- Download Users 7
20,189 19,532 23% 49% 18% 10% 2,046 90% 6% 4% 0%
Total Users (old defn) 8
7,926 - - - - - - - - - -
Table 2: Simulation Usage
Simulation Users 5 1,115 users
Simulation Runs 144,537 jobs
Total CPU Time 1,115 days  
Total Wall Time 1,830 days  
Total Interaction Time 289 days  
Users with > 10 mins of CPU Time 300 users  
Avg. Number of Simulation Runs/User 130 jobs  
Avg. Time between First and Last Simulation 36,232 days  
Repeat Users with > 10 Simulation Jobs 573 users  
Repeat Users with > 3 Months 9 476 users  
Table 3: Miscellaneous Statistics
Domains Served 4,674
Cummulative Interactive User Sessions 10 20,851
Cummulative Session Time 954 days
Visitors 11 66,559
Visits 12 177,432
New Accounts 1,017
Max User Logins 425 users on 2014-08-26
Web Server Hits 8,795,565
Table 4: Collaboration Usage
Shared Tool Sessions 13 37
New tools under development 7
Table 5: User statistics by registered/unregistered
Users Totals Residence Organization
Identified US Asia Europe Other Identified Edu. Ind. Gov. Other
Total Users 1
24,527 21,854 23% 49% 18% 10% 3,146 92% 5% 2% 1%
- Registered Users 2
3,189 1,296 49% 28% 13% 10% 1,373 91% 6% 1% 3%
- Unregistered Interactive Users 3
4,061 3,799 22% 53% 19% 6% 372 94% 3% 3% 0%
- Unregistered Download Users 4
17,277 16,759 21% 50% 19% 11% 1,401 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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