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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
3,054 2,975 37% 36% 16% 11% 234 72% 21% 3% 3%
- Simulation Users 5
0 0 0% 0% 0% 0% 0 0% 0% 0% 0%
- Interactive Users 6
338 329 60% 22% 9% 10% 28 96% 4% 0% 0%
- Download Users 7
2,777 2,767 37% 37% 16% 10% 5 80% 20% 0% 0%
Table 2: Simulation Usage
Simulation Users 5 0 users
Table 3: Miscellaneous Statistics
Domains Served 1,282
Cummulative Interactive User Sessions 10 705
Cummulative Session Time 66 days
Visitors 11 6,423
Visits 12 11,265
New Accounts 96
Max User Logins 58 users on 2012-01-31
Web Server Hits 458,045
Table 4: User statistics by registered/unregistered
Users Totals Residence Organization
Identified US Asia Europe Other Identified Edu. Ind. Gov. Other
Total Users 1
3,054 2,975 37% 36% 16% 11% 234 72% 21% 3% 3%
- Registered Users 2
124 58 81% 10% 0% 9% 108 58% 33% 1% 7%
- Unregistered Interactive Users 3
195 190 37% 33% 15% 16% 12 92% 8% 0% 0%
- Unregistered Download Users 4
2,735 2,727 36% 37% 17% 10% 114 83% 11% 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.