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Why the math question?
 
You are here: About Us › Usage Metrics › 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
110,109 109,192 35% 33% 23% 9% 26,049 72% 4% 2% 22%
- Simulation Users 5
8,352 8,161 60% 16% 16% 7% 7,766 92% 4% 1% 3%
- Interactive Users 6
33,578 33,318 48% 24% 19% 9% 9,653 96% 2% 2% 0%
- Download Users 7
98,235 98,013 35% 32% 23% 9% 19,379 95% 3% 2% 0%
Total Users (old defn) 8
42,003 - - - - - - - - - -
Table 2: Simulation Usage
Simulation Users 5 8,352 users
Simulation Runs 359,935 jobs
Total CPU Time 4,601 days  
Total Wall Time 25,124 days  
Total Interaction Time 7,829 days  
Users with > 10 mins of CPU Time 2,222 users  
Avg. Number of Simulation Runs/User 43 jobs  
Avg. Time between First and last Simualtion 180 days  
Repeat Users with > 10 Simulation Jobs 4,511 users  
Repeat Users with > 3 Months 9 2,408 users  
Table 3: Miscellaneous Statistics
Domains Served 13,864
Cummulative Interactive User Sessions 10 205,682
Cummulative Session Time 7,657 days
Visitors 11 275,939
Visits 12 886,570
New Accounts 7,555
Max User Logins 465 users on 2010-02-09
Web Server Hits 58,466,465
Table 4: "and more" Usage
Type Users
Interactive Download
No data found.
Table 5: Collaboration Usage
Online Meetings 261 meeting sessions
613 participants
Shared Tool Sessions 13 169
New tools under development 42
Table 6: User statistics by registered/unregistered
Users Totals Residence Organization
Identified US Asia Europe Other Identified Edu. Ind. Gov. Other
Total Users 1
110,109 109,192 35% 33% 23% 9% 26,049 72% 4% 2% 22%
- Registered Users 2
10,504 9,871 57% 20% 16% 7% 9,328 32% 5% 1% 62%
- Unregistered Interactive Users 3
20,132 20,004 39% 28% 23% 10% 3,997 95% 3% 3% 0%
- Unregistered Download Users 4
79,473 79,317 31% 35% 24% 10% 12,724 94% 3% 3% 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. -
  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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