Talk by Prof Nandini Kannan at ISI, Chennai at 4:30pm on Wednesday, 22nd January 2014
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announ...@isichennai.res.in
Jan 15, 2014, 2:19:52 AM1/15/14
to a...@isichennai.res.in, ma...@imsc.res.in, mat...@imsc.res.in, semin...@cmi.ac.in, csg...@imsc.res.in, isi-c...@googlegroups.com, Nandini Kannan
Speaker : Nandini Kannan
Professor, Department of Management Science and Statistics,
University of Texas at San Antonio, TX 78249, USA
and Visiting Professor, Chennai Mathematical Institute
Date : January 22nd, Wednesday
Time : 4:30pm - 5:30pm
Venue : Indian Statistical Institute (ISI), Chennai Centre
SETS (Society for Electronic Transactions and Security),
MGR Knowledge City, CIT Campus, Taramani.
(Landmark: Near IITM Research Park/ Ginger Hotel)
Title : Step-stress models with an immune fraction
Abstract: In reliability or survival analysis, researchers are often
interested in the effects of different stress levels such as temperature,
voltage, dose etc. on the lifetimes of experimental units. Accelerated
testing allows the experimenter to increase these stress levels to obtain
information on the parameters of the life distributions more quickly than
would be possible under normal operating conditions. A special class of
accelerated tests is the class of step-stress tests which allow the
experimenter to increase the stress level at fixed times during the
experiment. In this talk, we consider step-stress models assuming
different parametric forms for the hazard function and allowing for the
presence of an immune population. The immune population represents
resistant items that are not affected by the stress. We adapt the
cumulative exposure model discussed by Nelson and obtain the MLE’s of the
parameters. The model is fit to some data on altitude decompression
sickness.
Tea/snacks will be served before the talk (4:15pm)
Please forward this notice to anyone who you think may be interested.
Best Regards,
Seminar Coordinator.
Professor, Department of Management Science and Statistics,
University of Texas at San Antonio, TX 78249, USA
and Visiting Professor, Chennai Mathematical Institute
Date : January 22nd, Wednesday
Time : 4:30pm - 5:30pm
Venue : Indian Statistical Institute (ISI), Chennai Centre
SETS (Society for Electronic Transactions and Security),
MGR Knowledge City, CIT Campus, Taramani.
(Landmark: Near IITM Research Park/ Ginger Hotel)
Title : Step-stress models with an immune fraction
Abstract: In reliability or survival analysis, researchers are often
interested in the effects of different stress levels such as temperature,
voltage, dose etc. on the lifetimes of experimental units. Accelerated
testing allows the experimenter to increase these stress levels to obtain
information on the parameters of the life distributions more quickly than
would be possible under normal operating conditions. A special class of
accelerated tests is the class of step-stress tests which allow the
experimenter to increase the stress level at fixed times during the
experiment. In this talk, we consider step-stress models assuming
different parametric forms for the hazard function and allowing for the
presence of an immune population. The immune population represents
resistant items that are not affected by the stress. We adapt the
cumulative exposure model discussed by Nelson and obtain the MLE’s of the
parameters. The model is fit to some data on altitude decompression
sickness.
Tea/snacks will be served before the talk (4:15pm)
Please forward this notice to anyone who you think may be interested.
Best Regards,
Seminar Coordinator.
announ...@isichennai.res.in
Jan 21, 2014, 2:13:10 AM1/21/14
to a...@isichennai.res.in, ma...@imsc.res.in, mat...@imsc.res.in, semin...@cmi.ac.in, csg...@imsc.res.in, isi-c...@googlegroups.com
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