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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
11,970 11,689 34% 38% 16% 12% 844 84% 10% 4% 2%
- Simulation Users 5
0 0 0% 0% 0% 0% 0 0% 0% 0% 0%
- Interactive Users 6
1,171 1,150 57% 23% 13% 7% 146 99% 1% 0% 0%
- Download Users 7
11,160 11,122 35% 38% 16% 11% 198 97% 2% 1% 0%
Table 2: Simulation Usage
Simulation Users 5 0 users
Table 3: Miscellaneous Statistics
Domains Served 3,277
Cummulative Interactive User Sessions 10 2,318
Cummulative Session Time 175 days
Visitors 11 23,000
Visits 12 43,572
New Accounts 240
Max User Logins 58 users on 2012-01-31
Web Server Hits 1,673,308
Table 4: User statistics by registered/unregistered
Users Totals Residence Organization
Identified US Asia Europe Other Identified Edu. Ind. Gov. Other
Total Users 1
11,970 11,689 34% 38% 16% 12% 844 84% 10% 4% 2%
- Registered Users 2
367 127 54% 20% 2% 24% 307 79% 14% 1% 6%
- Unregistered Interactive Users 3
814 804 42% 29% 19% 10% 36 92% 6% 3% 0%
- Unregistered Download Users 4
10,789 10,758 33% 39% 16% 12% 501 87% 7% 6% 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.