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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
106,007 97,403 29% 36% 24% 11% 15,745 94% 4% 2% 1%
- Simulation Users 5
5,859 2,222 47% 27% 19% 8% 2,227 92% 4% 1% 3%
- Interactive Users 6
24,389 22,627 38% 34% 18% 10% 4,494 94% 4% 2% 0%
- Download Users 7
94,342 93,435 29% 36% 24% 11% 12,865 95% 3% 2% 0%
Total Users (old defn) 8
30,253 - - - - - - - - - -
Table 2: Simulation Usage
Simulation Users 5 5,859 users
Simulation Runs 174,632 jobs
Total CPU Time 4,010 days  
Total Wall Time 12,247 days  
Total Interaction Time 2,432 days  
Users with > 10 mins of CPU Time 1,570 users  
Avg. Number of Simulation Runs/User 30 jobs  
Avg. Time between First and Last Simulation 1,643 days  
Repeat Users with > 10 Simulation Jobs 2,667 users  
Repeat Users with > 3 Months 9 1,449 users  
Table 3: Miscellaneous Statistics
Domains Served 9,234
Cummulative Interactive User Sessions 10 58,490
Cummulative Session Time 2,347 days
Visitors 11 217,206
Visits 12 523,192
New Accounts 6,446
Max User Logins 644 users on 2013-02-20
Web Server Hits 32,139,890
Table 4: Collaboration Usage
Shared Tool Sessions 13 37
New tools under development 18
Table 5: User statistics by registered/unregistered
Users Totals Residence Organization
Identified US Asia Europe Other Identified Edu. Ind. Gov. Other
Total Users 1
106,007 97,403 29% 36% 24% 11% 15,745 94% 4% 2% 1%
- Registered Users 2
11,127 3,436 45% 29% 17% 9% 3,458 89% 6% 1% 4%
- Unregistered Interactive Users 3
12,526 11,924 30% 38% 22% 11% 1,739 95% 3% 2% 0%
- Unregistered Download Users 4
82,354 82,043 28% 37% 25% 11% 10,548 95% 3% 2% 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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