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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
46,138 41,985 20% 45% 25% 10% 5,068 94% 4% 1% 1%
- Simulation Users 5
2,045 794 49% 28% 15% 9% 826 92% 4% 1% 3%
- Interactive Users 6
10,680 9,874 26% 44% 21% 9% 1,670 96% 3% 1% 0%
- Download Users 7
39,410 38,288 20% 44% 25% 10% 3,681 94% 4% 2% 0%
Total Users (old defn) 8
12,725 - - - - - - - - - -
Table 2: Simulation Usage
Simulation Users 5 2,045 users
Simulation Runs 40,815 jobs
Total CPU Time 1,486 days  
Total Wall Time 1,732 days  
Total Interaction Time 576 days  
Users with > 10 mins of CPU Time 596 users  
Avg. Number of Simulation Runs/User 20 jobs  
Avg. Time between First and Last Simulation 1,368 days  
Repeat Users with > 10 Simulation Jobs 794 users  
Repeat Users with > 3 Months 9 534 users  
Table 3: Miscellaneous Statistics
Domains Served 5,812
Cummulative Interactive User Sessions 10 22,729
Cummulative Session Time 1,008 days
Visitors 11 98,398
Visits 12 233,247
New Accounts 1,196
Max User Logins 527 users on 2014-11-13
Web Server Hits 9,537,153
Table 4: Collaboration Usage
Shared Tool Sessions 13 17
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
46,138 41,985 20% 45% 25% 10% 5,068 94% 4% 1% 1%
- Registered Users 2
4,208 1,444 50% 27% 14% 8% 1,493 91% 5% 1% 3%
- Unregistered Interactive Users 3
7,140 6,689 17% 51% 24% 8% 640 96% 3% 1% 0%
- Unregistered Download Users 4
34,790 33,852 19% 44% 26% 10% 2,935 95% 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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