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You are here: Explore › Usage › Overview › Prior 12 Months

Usage: Overview

Table 1: User statistics
Users Totals Residence Organization
Identified US Asia Europe Other Identified Edu. Ind. Gov. Other
Total Users 1
914 910 48% 20% 23% 9% 220 35% 15% 43% 7%
- Simulation Users 5
5 5 100% 0% 0% 0% 5 60% 0% 40% 0%
- Interactive Users 6
580 578 46% 21% 24% 10% 65 17% 0% 83% 0%
- Download Users 7
425 425 60% 15% 18% 7% 53 13% 0% 87% 0%
Table 2: Simulation Usage
Simulation Users 5 5 users
Simulation Runs 12 jobs
Total CPU Time 19 seconds  
Total Wall Time 2 hours  
Total Interaction Time 2 minutes  
Users with > 10 mins of CPU Time 0 users  
Avg. Number of Simulation Runs/User 2 jobs  
Avg. Time between First and Last Simulation 226 days  
Repeat Users with > 10 Simulation Jobs 0 users  
Repeat Users with > 3 Months 9 5 users  
Table 3: Miscellaneous Statistics
Domains Served 2,182
Cummulative Interactive User Sessions 10 1,191
Cummulative Session Time 400 days
Visitors 11 11,013
Visits 12 25,243
New Accounts 111
Max User Logins 18 users on 2011-03-11
Web Server Hits 1,719,835
Table 4: User statistics by registered/unregistered
Users Totals Residence Organization
Identified US Asia Europe Other Identified Edu. Ind. Gov. Other
Total Users 1
914 910 48% 20% 23% 9% 220 35% 15% 43% 7%
- Registered Users 2
181 179 76% 3% 15% 7% 178 29% 17% 45% 9%
- Unregistered Interactive Users 3
425 423 33% 27% 29% 11% 14 57% 7% 36% 0%
- Unregistered Download Users 4
308 308 52% 20% 20% 7% 28 61% 4% 36% 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.