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Home › Usage › Overview › Prior 12 Months

Usage: Overview

Table 1: User statistics
Users Totals Residence Organization
Identified US Asia Europe Other Identified Edu. Ind. Gov. Other
Total Users 1
218,345 217,074 28% 38% 23% 11% 41,519 92% 4% 2% 1%
- Simulation Users 5
11,793 6,326 48% 25% 17% 10% 6,326 90% 5% 1% 4%
- Interactive Users 6
61,389 59,218 34% 32% 20% 13% 10,398 95% 3% 1% 0%
- Download Users 7
191,123 189,760 27% 39% 23% 11% 25,756 95% 3% 2% 0%
Total Users (old defn) 8
73,193 - - - - - - - - - -
Table 2: Simulation Usage
Simulation Users 5 11,793 users
Simulation Runs 534,968 jobs
Total CPU Time 4,933 days  
Total Wall Time 38,965 days  
Total Interaction Time 9,635 days  
Users with > 10 mins of CPU Time 1,977 users  
Avg. Number of Simulation Runs/User 45 jobs  
Avg. Time between First and Last Simulation 241,499 days  
Repeat Users with > 10 Simulation Jobs 6,100 users  
Repeat Users with > 3 Months 9 2,465 users  
Table 3: Miscellaneous Statistics
Domains Served 15,265
Cummulative Interactive User Sessions 10 196,374
Cummulative Session Time 10,106 days
Visitors 11 454,893
Visits 12 1,383,858
New Accounts 11,988
Max User Logins 763 users on 2012-01-30
Web Server Hits 83,001,039
Table 4: Collaboration Usage
Online Meetings 41 meeting sessions
146 participants
Shared Tool Sessions 13 149
New tools under development 77
Table 5: User statistics by registered/unregistered
Users Totals Residence Organization
Identified US Asia Europe Other Identified Edu. Ind. Gov. Other
Total Users 1
218,345 217,074 28% 38% 23% 11% 41,519 92% 4% 2% 1%
- Registered Users 2
15,960 15,957 48% 26% 17% 10% 15,956 89% 6% 1% 4%
- Unregistered Interactive Users 3
35,278 34,648 27% 35% 23% 14% 4,134 94% 4% 2% 0%
- Unregistered Download Users 4
167,107 166,469 26% 40% 23% 11% 21,429 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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