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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
29,181 26,147 26% 41% 24% 9% 3,817 94% 4% 1% 1%
- Simulation Users 5
1,548 636 50% 30% 14% 7% 672 93% 4% 0% 3%
- Interactive Users 6
6,880 6,307 31% 40% 20% 9% 1,051 95% 3% 2% 0%
- Download Users 7
24,980 24,105 25% 41% 24% 9% 2,701 94% 4% 2% 0%
Total Users (old defn) 8
8,434 - - - - - - - - - -
Table 2: Simulation Usage
Simulation Users 5 1,548 users
Simulation Runs 48,618 jobs
Total CPU Time 1,540 days  
Total Wall Time 1,595 days  
Total Interaction Time 448 days  
Users with > 10 mins of CPU Time 482 users  
Avg. Number of Simulation Runs/User 31 jobs  
Avg. Time between First and Last Simulation 311 days  
Repeat Users with > 10 Simulation Jobs 604 users  
Repeat Users with > 3 Months 9 477 users  
Table 3: Miscellaneous Statistics
Domains Served 4,932
Cummulative Interactive User Sessions 10 15,124
Cummulative Session Time 601 days
Visitors 11 76,402
Visits 12 178,076
New Accounts 874
Max User Logins 371 users on 2014-12-01
Web Server Hits 8,579,217
Table 4: Collaboration Usage
Shared Tool Sessions 13 22
New tools under development 4
Table 5: User statistics by registered/unregistered
Users Totals Residence Organization
Identified US Asia Europe Other Identified Edu. Ind. Gov. Other
Total Users 1
29,181 26,147 26% 41% 24% 9% 3,817 94% 4% 1% 1%
- Registered Users 2
3,151 1,173 49% 30% 13% 8% 1,230 91% 5% 0% 3%
- Unregistered Interactive Users 3
4,014 3,710 25% 44% 23% 8% 409 96% 3% 1% 0%
- Unregistered Download Users 4
22,016 21,264 24% 41% 25% 9% 2,178 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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