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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
100,730 90,914 24% 41% 24% 10% 12,196 95% 3% 1% 1%
- Simulation Users 5
4,200 1,583 48% 28% 15% 9% 1,646 92% 4% 1% 3%
- Interactive Users 6
23,604 21,369 30% 41% 20% 9% 4,236 97% 2% 1% 0%
- Download Users 7
85,606 82,905 24% 41% 25% 10% 9,408 95% 3% 2% 0%
Total Users (old defn) 8
27,812 - - - - - - - - - -
Table 2: Simulation Usage
Simulation Users 5 4,200 users
Simulation Runs 136,751 jobs
Total CPU Time 4,033 days  
Total Wall Time 7,233 days  
Total Interaction Time 1,986 days  
Users with > 10 mins of CPU Time 1,501 users  
Avg. Number of Simulation Runs/User 33 jobs  
Avg. Time between First and Last Simulation 649 days  
Repeat Users with > 10 Simulation Jobs 1,773 users  
Repeat Users with > 3 Months 9 1,162 users  
Table 3: Miscellaneous Statistics
Domains Served 9,643
Cummulative Interactive User Sessions 10 64,665
Cummulative Session Time 2,802 days
Visitors 11 226,980
Visits 12 633,103
New Accounts 3,232
Max User Logins 527 users on 2014-11-13
Web Server Hits 27,628,613
Table 4: Collaboration Usage
Shared Tool Sessions 13 52
New tools under development 15
Table 5: User statistics by registered/unregistered
Users Totals Residence Organization
Identified US Asia Europe Other Identified Edu. Ind. Gov. Other
Total Users 1
100,730 90,914 24% 41% 24% 10% 12,196 95% 3% 1% 1%
- Registered Users 2
9,064 2,631 48% 28% 15% 9% 2,727 91% 5% 1% 3%
- Unregistered Interactive Users 3
14,968 13,825 22% 48% 22% 8% 1,675 96% 3% 1% 0%
- Unregistered Download Users 4
76,698 74,458 24% 41% 25% 11% 7,794 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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