Display Settings:


Send to:

Choose Destination
See comment in PubMed Commons below
Healthc Inform Res. 2014 Jan;20(1):69-75. doi: 10.4258/hir.2014.20.1.69. Epub 2014 Jan 31.

Lifelog agent for human activity pattern analysis on health avatar platform.

Author information

  • 1Human Computing Research Section, SW ยท Content Research Laboratory, Electronics and Telecommunications Research Institute, Daejeon, Korea.
  • 2Seoul National University Biomedical Informatics, Division of Biomedical Informatics, Seoul National University College of Medicine, Seoul, Korea.



To provide accurate personalized medical care, it is necessary to gather individual-related data or contextual information regarding the target person. Nowadays a large number of people possess smartphones, which enables sensors in the smartphones to be used for lifelogging. The objective of the study is to analyze human activity pattern by using lifelog agent cooperating with the Health Avatar platform.


Using the lifelog measured by accelerometer and gyroscope in a smartphone at a 50 Hz rate, the agent reveals how long the user walks, runs, sits, stands, and lies down, and this information is summarized by hours. The summaries are sent to the Health Avatar platform and finally are written in the Continuity of Care Record (CCR) format.


The lifelog agent is successfully operated with the Health Avatar platform. In addition, we implement an application that displays the user's activity patterns in a graph and calculates the metabolic equivalent of task based calorie burned by hour or by day using the lifelog of the CCR form to show that the lifelog can be used as medical records.


The agent shows how lifelogs are analyzed and summarized to help activity recognition. We believe that our agent demonstrates a way of incorporating lifelogs into medical care and a way of exploiting lifelogs in a medical format.


Activities of Daily Living; Automated Pattern Recognition; Health Behavior; Medical Records; Mobile Phone

Free PMC Article

Images from this publication.See all images (5)Free text

Figure 1
Figure 2
Figure 3
Figure 4
Figure 5
PubMed Commons home

PubMed Commons

How to join PubMed Commons

    Supplemental Content

    Full text links

    Icon for Korean Society of Medical Informatics Icon for PubMed Central
    Loading ...
    Write to the Help Desk