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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
26,132 23,948 20% 45% 24% 10% 3,111 91% 5% 3% 1%
- Simulation Users 5
1,061 587 46% 28% 18% 9% 603 91% 5% 1% 3%
- Interactive Users 6
7,266 6,742 29% 44% 21% 7% 1,036 93% 4% 2% 0%
- Download Users 7
21,726 21,201 20% 44% 25% 11% 2,292 90% 6% 4% 0%
Total Users (old defn) 8
8,331 - - - - - - - - - -
Table 2: Simulation Usage
Simulation Users 5 1,061 users
Simulation Runs 54,828 jobs
Total CPU Time 1,310 days  
Total Wall Time 8,492 days  
Total Interaction Time 737 days  
Users with > 10 mins of CPU Time 397 users  
Avg. Number of Simulation Runs/User 52 jobs  
Avg. Time between First and Last Simulation 449 days  
Repeat Users with > 10 Simulation Jobs 361 users  
Repeat Users with > 3 Months 9 442 users  
Table 3: Miscellaneous Statistics
Domains Served 5,618
Cummulative Interactive User Sessions 10 20,506
Cummulative Session Time 670 days
Visitors 11 75,464
Visits 12 224,191
New Accounts 727
Max User Logins 298 users on 2014-06-24
Web Server Hits 7,314,523
Table 4: Collaboration Usage
Shared Tool Sessions 13 14
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
26,132 23,948 20% 45% 24% 10% 3,111 91% 5% 3% 1%
- Registered Users 2
2,546 1,059 48% 28% 16% 8% 1,091 89% 6% 1% 4%
- Unregistered Interactive Users 3
4,755 4,475 20% 51% 23% 6% 356 96% 2% 2% 0%
- Unregistered Download Users 4
18,831 18,414 19% 45% 25% 11% 1,664 91% 5% 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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