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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
201,706 200,625 28% 37% 23% 11% 39,451 92% 4% 2% 1%
- Simulation Users 5
11,523 9,288 51% 22% 18% 9% 9,288 91% 5% 1% 4%
- Interactive Users 6
55,776 53,929 36% 30% 21% 12% 10,165 95% 3% 2% 0%
- Download Users 7
174,693 173,589 27% 39% 23% 11% 24,025 94% 3% 2% 0%
Total Users (old defn) 8
67,310 - - - - - - - - - -
Table 2: Simulation Usage
Simulation Users 5 11,523 users
Simulation Runs 379,003 jobs
Total CPU Time 5,204 days  
Total Wall Time 35,135 days  
Total Interaction Time 9,456 days  
Users with > 10 mins of CPU Time 1,689 users  
Avg. Number of Simulation Runs/User 33 jobs  
Avg. Time between First and Last Simulation 100,481 days  
Repeat Users with > 10 Simulation Jobs 5,113 users  
Repeat Users with > 3 Months 9 2,922 users  
Table 3: Miscellaneous Statistics
Domains Served 14,534
Cummulative Interactive User Sessions 10 165,871
Cummulative Session Time 7,552 days
Visitors 11 416,010
Visits 12 1,275,910
New Accounts 12,165
Max User Logins 763 users on 2012-01-30
Web Server Hits 71,515,222
Table 4: Collaboration Usage
Online Meetings 45 meeting sessions
150 participants
Shared Tool Sessions 13 147
New tools under development 58
Table 5: User statistics by registered/unregistered
Users Totals Residence Organization
Identified US Asia Europe Other Identified Edu. Ind. Gov. Other
Total Users 1
201,706 200,625 28% 37% 23% 11% 39,451 92% 4% 2% 1%
- Registered Users 2
15,214 15,210 50% 25% 16% 9% 15,209 89% 6% 1% 4%
- Unregistered Interactive Users 3
33,975 33,386 29% 34% 24% 13% 4,262 94% 4% 2% 0%
- Unregistered Download Users 4
152,517 152,029 26% 40% 24% 11% 19,980 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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