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Logins to the Wireless network at Rutgers Period: 07/31/2002 - 03/13/2004

Logins to the Wireless network at Rutgers Period: 07/31/2002 - 03/13/2004. Probability of choosing a Desktop/Laptop [Monday – Friday]. 1.45%. DP. LP. [0 am – 8 am]. 46.20%. 98.55%. 53.80 %. 20.77%. DP = Desktop LP = Laptop. DP. LP. [8 am – 19 pm]. 68.30%. 79.23%. 31.70 %. 5.51%.

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Logins to the Wireless network at Rutgers Period: 07/31/2002 - 03/13/2004

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  1. Logins to the Wireless network at RutgersPeriod: 07/31/2002 - 03/13/2004

  2. Probability of choosing a Desktop/Laptop [Monday – Friday] 1.45% DP LP [0 am – 8 am] 46.20% 98.55% 53.80 % 20.77% DP = Desktop LP = Laptop DP LP [8 am – 19 pm] 68.30% 79.23% 31.70 % 5.51% DP LP [19 am – 0 am] 50.78% 94.49% 49.22 %

  3. Probability of choosing a Desktop/Laptop [Weekend] 0.85% DP LP [0 am – 9 am] 17.23% 99.15% 82.77 % 3.71% DP = Desktop LP = Laptop DP LP [9 am – 19 pm] 57.75% 96.29% 42.25 % 2.63% DP LP [19 am – 0 am] 47.44% 97.37% 52.56 %

  4. Model for Laptop Uptime [Mon-Fri: 0am – 8am] Sigmoidal Hill 3 parameter: f(x) = a*x^b / (c^b + x^b) Mean UpTime: 4.40 hours

  5. Model for Laptop Uptime [Mon-Fri: 8am – 19pm] Sigmoidal Hill 3 parameter: f(x) = a*x^b / (c^b + x^b) Mean UpTime: 2.73 hours

  6. Model for Laptop Uptime [Mon-Fri: 19pm – 0am] Sigmoidal Hill 3 parameter: f(x) = a*x^b / (c^b + x^b) Mean UpTime: 2.63 hours

  7. Model for Laptop Uptime [Weekend: 0am – 9am] Sigmoidal Hill 3 parameter: f(x) = a*x^b / (c^b + x^b) Mean UpTime: 5.50 hours

  8. Model for Laptop Uptime [Weekend: 9am – 19pm] Sigmoidal Hill 3 parameter: f(x) = a*x^b / (c^b + x^b) Mean UpTime: 4.45 hours

  9. Model for Laptop Uptime [Weekend: 19pm – 0am] Sigmoidal Hill 3 parameter: f(x) = a*x^b / (c^b + x^b) Mean UpTime: 3.39 hours

  10. Seer Traces: Norgay, Yeager (486 laptops) • Traces were collected in 1996 • Norgay Trace: 10 months long • Yeager Trace: 5.5 months long • Laptops were used for software developments and paper writing

  11. Example of the User Model using the Traces from Norgay • The user has 3 devices: 1 Laptop (LP), 1 Desktop at Home (DSH), 1 Desktop at Work (DSW) • The dots represent accesses from the Norgay traces on 4/24/96 (Wednesday) Dev-2 Dev-1 Dev-0 Up Down Up Down Up Down

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