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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
574 526 43% 26% 23% 8% 166 70% 3% 5% 22%
- Simulation Users 5
12 1 100% 0% 0% 0% 7 71% 0% 14% 14%
- Interactive Users 6
217 216 64% 17% 13% 6% 79 92% 0% 8% 0%
- Download Users 7
487 485 51% 23% 20% 7% 167 93% 2% 5% 0%
Table 2: Miscellaneous Statistics
Domains Served 596
Cummulative Interactive User Sessions 10 361
Cummulative Session Time 9 days
Visitors 11 2,136
Visits 12 4,199
New Accounts 23
Max User Logins 12 users on 2009-10-09
Web Server Hits 182,057
Table 3: User statistics by registered/unregistered
Users Totals Residence Organization
Identified US Asia Europe Other Identified Edu. Ind. Gov. Other
Total Users 1
574 526 43% 26% 23% 8% 166 70% 3% 5% 22%
- Registered Users 2
46 1 100% 0% 0% 0% 40 0% 5% 5% 90%
- Unregistered Interactive Users 3
152 151 51% 23% 18% 8% 36 94% 0% 6% 0%
- Unregistered Download Users 4
376 374 40% 28% 25% 8% 90 92% 3% 4% 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. Based on MIT OCW metric of Visitors: Visitors are identified as Unique IP addresses
  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.