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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
33,345 28,738 32% 40% 18% 10% 5,204 94% 3% 1% 1%
- Simulation Users 5
1,920 834 56% 26% 11% 8% 907 94% 4% 0% 2%
- Interactive Users 6
8,768 7,745 43% 35% 15% 7% 2,080 96% 3% 1% 0%
- Download Users 7
27,692 26,719 32% 40% 18% 10% 3,838 94% 4% 2% 0%
Total Users (old defn) 8
10,689 - - - - - - - - - -
Table 2: Simulation Usage
Simulation Users 5 1,920 users
Simulation Runs 110,328 jobs
Total CPU Time 464 days  
Total Wall Time 2,877 days  
Total Interaction Time 560 days  
Users with > 10 mins of CPU Time 712 users  
Avg. Number of Simulation Runs/User 57 jobs  
Avg. Time between First and Last Simulation 39,871 days  
Repeat Users with > 10 Simulation Jobs 1,227 users  
Repeat Users with > 3 Months 9 600 users  
Table 3: Miscellaneous Statistics
Domains Served 5,245
Cummulative Interactive User Sessions 10 23,876
Cummulative Session Time 878 days
Visitors 11 80,471
Visits 12 204,249
New Accounts 1,825
Max User Logins 549 users on 2014-09-18
Web Server Hits 9,845,349
Table 4: Collaboration Usage
Shared Tool Sessions 13 27
New tools under development 1
Table 5: User statistics by registered/unregistered
Users Totals Residence Organization
Identified US Asia Europe Other Identified Edu. Ind. Gov. Other
Total Users 1
33,345 28,738 32% 40% 18% 10% 5,204 94% 3% 1% 1%
- Registered Users 2
4,994 1,552 54% 26% 12% 8% 1,646 92% 5% 1% 3%
- Unregistered Interactive Users 3
4,437 4,034 28% 45% 19% 8% 589 97% 2% 1% 0%
- Unregistered Download Users 4
23,914 23,152 31% 40% 18% 10% 2,969 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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