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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
25,686 22,833 25% 45% 21% 9% 3,307 92% 4% 2% 2%
- Simulation Users 5
2,050 873 49% 29% 14% 8% 918 94% 3% 1% 3%
- Interactive Users 6
3,742 3,611 28% 46% 19% 7% 447 90% 6% 3% 0%
- Download Users 7
21,447 21,114 24% 45% 22% 9% 1,943 92% 4% 3% 0%
Total Users (old defn) 8
5,768 - - - - - - - - - -
Table 2: Simulation Usage
Simulation Users 5 2,050 users
Simulation Runs 41,519 jobs
Total CPU Time 1,638 days  
Total Wall Time 1,458 days  
Total Interaction Time 625 days  
Users with > 10 mins of CPU Time 605 users  
Avg. Number of Simulation Runs/User 20 jobs  
Avg. Time between First and Last Simulation 302 days  
Repeat Users with > 10 Simulation Jobs 839 users  
Repeat Users with > 3 Months 9 563 users  
Table 3: Miscellaneous Statistics
Domains Served 4,381
Cummulative Interactive User Sessions 10 8,396
Cummulative Session Time 344 days
Visitors 11 51,836
Visits 12 109,371
New Accounts 1,141
Max User Logins 425 users on 2014-03-03
Web Server Hits 4,734,612
Table 4: Collaboration Usage
Shared Tool Sessions 13 15
New tools under development 4
Table 5: User statistics by registered/unregistered
Users Totals Residence Organization
Identified US Asia Europe Other Identified Edu. Ind. Gov. Other
Total Users 1
25,686 22,833 25% 45% 21% 9% 3,307 92% 4% 2% 2%
- Registered Users 2
4,003 1,504 52% 28% 13% 8% 1,577 91% 5% 1% 3%
- Unregistered Interactive Users 3
2,607 2,534 22% 50% 21% 7% 212 92% 5% 3% 0%
- Unregistered Download Users 4
19,076 18,795 23% 45% 22% 10% 1,518 94% 3% 3% 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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