tailieunhanh - Báo cáo hóa học: " Research Article Detection of Early Morning Daily Activities with Static Home and Wearable Wireless Sensors"

Tuyển tập báo cáo các nghiên cứu khoa học quốc tế ngành hóa học dành cho các bạn yêu hóa học tham khảo đề tài: Research Article Detection of Early Morning Daily Activities with Static Home and Wearable Wireless Sensors | Hindawi Publishing Corporation EURASIP Journal on Advances in Signal Processing Volume 2008 Article ID 273130 11 pages doi 2008 273130 Research Article Detection of Early Morning Daily Activities with Static Home and Wearable Wireless Sensors Nuri Firat Ince 1 2 Cheol-Hong Min 1 Ahmed Tewfik 1 and David Vanderpool1 1 Department of Electrical and Computer Engineering University of Minnesota MN 55455 USA 2 Minneapolis VA Medical Center Department of Veterans Affairs Minnesota MN 55417 USA Correspondence should be addressed to Ahmed Tewfik tewfik@ Received 1 March 2007 Accepted 12 July 2007 Recommended by Enis Ahmet Cetin This paper describes a flexible cost-effective wireless in-home activity monitoring system for assisting patients with cognitive impairments due to traumatic brain injury TBI . The system locates the subject with fixed home sensors and classifies early morning bathroom activities of daily living with a wearable wireless accelerometer. The system extracts time- and frequencydomain features from the accelerometer data and classifies these features with a hybrid classifier that combines Gaussian mixture models and a finite state machine. In particular the paper establishes that despite similarities between early morning bathroom activities of daily living it is possible to detect and classify these activities with high accuracy. It also discusses system training and provides data to show that with proper feature selection accurate detection and classification are possible for any subject with no subject specific training. Copyright 2008 Nuri Firat Ince et al. This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use distribution and reproduction in any medium provided the original work is properly cited. 1. INTRODUCTION Traumatic brain injury TBI is one of the leading causes of death and permanent disability in the United States US . According to the Center for Disease Control