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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
30,389 25,273 26% 39% 26% 9% 4,125 94% 4% 2% 1%
- Simulation Users 5
1,597 613 44% 34% 15% 7% 643 93% 3% 2% 2%
- Interactive Users 6
7,382 6,451 36% 36% 20% 8% 1,618 96% 3% 1% 0%
- Download Users 7
24,548 23,500 26% 39% 26% 9% 2,902 93% 5% 2% 0%
Total Users (old defn) 8
8,982 - - - - - - - - - -
Table 2: Simulation Usage
Simulation Users 5 1,597 users
Simulation Runs 59,136 jobs
Total CPU Time 2,583 days  
Total Wall Time 1,612 days  
Total Interaction Time 394 days  
Users with > 10 mins of CPU Time 458 users  
Avg. Number of Simulation Runs/User 37 jobs  
Avg. Time between First and Last Simulation 395 days  
Repeat Users with > 10 Simulation Jobs 572 users  
Repeat Users with > 3 Months 9 481 users  
Table 3: Miscellaneous Statistics
Domains Served 5,267
Cummulative Interactive User Sessions 10 15,248
Cummulative Session Time 698 days
Visitors 11 76,096
Visits 12 161,332
New Accounts 2,795
Max User Logins 1072 users on 2015-01-21
Web Server Hits 8,320,598
Table 4: Collaboration Usage
Shared Tool Sessions 13 13
New tools under development 3
Table 5: User statistics by registered/unregistered
Users Totals Residence Organization
Identified US Asia Europe Other Identified Edu. Ind. Gov. Other
Total Users 1
30,389 25,273 26% 39% 26% 9% 4,125 94% 4% 2% 1%
- Registered Users 2
5,230 1,315 48% 31% 14% 7% 1,400 92% 5% 1% 2%
- Unregistered Interactive Users 3
3,969 3,615 27% 41% 24% 8% 521 96% 3% 1% 0%
- Unregistered Download Users 4
21,190 20,343 25% 39% 27% 9% 2,204 94% 4% 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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