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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
84,036 76,723 24% 42% 24% 11% 10,643 93% 4% 2% 1%
- Simulation Users 5
3,664 1,734 44% 29% 17% 10% 1,797 92% 4% 1% 3%
- Interactive Users 6
20,832 19,279 29% 42% 20% 9% 3,330 95% 3% 2% 0%
- Download Users 7
70,841 69,246 24% 41% 24% 11% 8,063 94% 4% 3% 0%
Total Users (old defn) 8
24,502 - - - - - - - - - -
Table 2: Simulation Usage
Simulation Users 5 3,664 users
Simulation Runs 164,423 jobs
Total CPU Time 3,610 days  
Total Wall Time 12,511 days  
Total Interaction Time 2,231 days  
Users with > 10 mins of CPU Time 1,258 users  
Avg. Number of Simulation Runs/User 45 jobs  
Avg. Time between First and Last Simulation 747 days  
Repeat Users with > 10 Simulation Jobs 1,467 users  
Repeat Users with > 3 Months 9 1,246 users  
Table 3: Miscellaneous Statistics
Domains Served 10,447
Cummulative Interactive User Sessions 10 58,653
Cummulative Session Time 2,346 days
Visitors 11 218,375
Visits 12 687,265
New Accounts 2,610
Max User Logins 452 users on 2014-04-22
Web Server Hits 24,779,209
Table 4: Collaboration Usage
Shared Tool Sessions 13 41
New tools under development 12
Table 5: User statistics by registered/unregistered
Users Totals Residence Organization
Identified US Asia Europe Other Identified Edu. Ind. Gov. Other
Total Users 1
84,036 76,723 24% 42% 24% 11% 10,643 93% 4% 2% 1%
- Registered Users 2
8,159 2,885 45% 29% 17% 10% 2,987 89% 6% 1% 4%
- Unregistered Interactive Users 3
13,113 12,342 23% 48% 21% 8% 1,291 96% 2% 1% 0%
- Unregistered Download Users 4
62,764 61,496 23% 41% 24% 11% 6,365 94% 3% 3% 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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