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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
33,921 30,067 31% 37% 22% 10% 5,503 95% 3% 1% 1%
- Simulation Users 5
1,954 856 55% 24% 13% 9% 897 94% 3% 0% 3%
- Interactive Users 6
8,849 7,805 40% 35% 18% 7% 2,127 97% 2% 1% 0%
- Download Users 7
28,694 27,757 31% 36% 22% 11% 4,068 95% 3% 2% 0%
Total Users (old defn) 8
10,805 - - - - - - - - - -
Table 2: Simulation Usage
Simulation Users 5 1,954 users
Simulation Runs 43,800 jobs
Total CPU Time 658 days  
Total Wall Time 2,769 days  
Total Interaction Time 739 days  
Users with > 10 mins of CPU Time 735 users  
Avg. Number of Simulation Runs/User 22 jobs  
Avg. Time between First and Last Simulation 341 days  
Repeat Users with > 10 Simulation Jobs 784 users  
Repeat Users with > 3 Months 9 562 users  
Table 3: Miscellaneous Statistics
Domains Served 5,389
Cummulative Interactive User Sessions 10 26,798
Cummulative Session Time 1,047 days
Visitors 11 82,955
Visits 12 221,766
New Accounts 1,154
Max User Logins 474 users on 2014-10-15
Web Server Hits 9,511,720
Table 4: Collaboration Usage
Shared Tool Sessions 13 13
New tools under development 6
Table 5: User statistics by registered/unregistered
Users Totals Residence Organization
Identified US Asia Europe Other Identified Edu. Ind. Gov. Other
Total Users 1
33,921 30,067 31% 37% 22% 10% 5,503 95% 3% 1% 1%
- Registered Users 2
4,154 1,537 54% 24% 13% 8% 1,598 92% 4% 1% 3%
- Unregistered Interactive Users 3
4,781 4,285 29% 43% 21% 7% 719 97% 2% 1% 0%
- Unregistered Download Users 4
24,986 24,245 30% 37% 23% 11% 3,186 96% 2% 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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