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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
330,251 302,034 25% 42% 22% 11% 38,948 94% 3% 2% 1%
- Simulation Users 5
12,677 4,804 46% 28% 16% 10% 5,026 91% 5% 1% 3%
- Interactive Users 6
70,541 64,131 31% 40% 19% 10% 11,027 96% 2% 1% 0%
- Download Users 7
285,885 280,521 26% 41% 22% 11% 31,519 95% 3% 2% 0%
Total Users (old defn) 8
83,265 - - - - - - - - - -
Table 2: Simulation Usage
Simulation Users 5 12,677 users
Simulation Runs 544,271 jobs
Total CPU Time 15,502 days  
Total Wall Time 47,329 days  
Total Interaction Time 8,990 days  
Users with > 10 mins of CPU Time 4,785 users  
Avg. Number of Simulation Runs/User 43 jobs  
Avg. Time between First and Last Simulation 370 days  
Repeat Users with > 10 Simulation Jobs 5,962 users  
Repeat Users with > 3 Months 9 3,321 users  
Table 3: Miscellaneous Statistics
Domains Served 19,649
Cummulative Interactive User Sessions 10 205,084
Cummulative Session Time 8,779 days
Visitors 11 689,743
Visits 12 2,161,862
New Accounts 14,311
Max User Logins 1000 users on 2014-02-19
Web Server Hits 95,163,534
Table 4: Collaboration Usage
Shared Tool Sessions 13 132
New tools under development 61
Table 5: User statistics by registered/unregistered
Users Totals Residence Organization
Identified US Asia Europe Other Identified Edu. Ind. Gov. Other
Total Users 1
330,251 302,034 25% 42% 22% 11% 38,948 94% 3% 2% 1%
- Registered Users 2
28,965 7,053 46% 28% 16% 9% 7,364 89% 6% 1% 4%
- Unregistered Interactive Users 3
42,304 39,700 24% 46% 21% 9% 4,756 95% 3% 2% 0%
- Unregistered Download Users 4
258,982 255,281 25% 42% 23% 11% 26,828 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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