• Journal of the Institute of Electronics and Information Engineers
• /
• v.52 no.1
• /
• pp.162-172
• /
• 2015

In this paper, we propose an adaptive detection algorithm of footstep and a classification algorithm for activities of the detected footstep. The proposed algorithm can detect and classify whole movement as well as individual and irregular activities, since it does not use continuous footstep signals which are used by most previous research. For classifying movement, we use feature vectors obtained from frequency spectrum from FFT, CWT, AR model and image of AR spectrogram. With SVM classifier, we obtain classification accuracy of single footstep activities over 90% when feature vectors using AR spectrogram image are used.

• The Journal of Korean Institute of Communications and Information Sciences
• /
• v.39C no.1
• /
• pp.60-69
• /
• 2014

Footstep detection using seismic sensors for security is a very meaningful task, but readings can easily fluctuate due to noise in outdoor environment. We propose NSSC method based on nonlinear spectral subtraction and cross-correlation using prime footstep model signal as a footstep signal refining process that enhances the signal-to-noise ratio (SNR) and attenuates noise. After de-noising, a detection event classification method is presented as further refining process to ensure that the detection result is a footstep. To validate the proposed algorithm, representative experiments including sunny and rainy-day cases are demonstrated.

• Journal of Korean Society of Archives and Records Management
• /
• v.12 no.2
• /
• pp.71-91
• /
• 2012

This article attempts to examine the definition and categories of research records in order to include ethnographic data into research records by comparing the laboratory records with the ethnographic data produced in the field work. And it discusses the records management task of ethnogrpahic data using the field work data collected in the research project of 'Cultural History of Kitchen' which was carried out by one of the authors from 2002 to 2005. The authors draw out the classification of laboratory records from the previous studies on research records, apply it to the ethnographic data and illustrate the new classification and description of research records reflecting the features of ethnographic data. Doing so, the authors expand the concept of research records and provide a case study of research records management based on the collaboration between the researcher and the archivist. Ultimately this study will be a footstep toward construction of community archives and everyday life archives since the records for those archives may be as diverse as the research records based on the ethnographic data from the research project of 'Cultural History of Kitchen'.