본 논문은 스마트폰을 이용하여 장시간동안 연속적으로 사용자의 행동정보를 수집 및 기록하는데 있어 요구되는 최적화된 수집주기를 제안한다. 스마트폰에서 장시간 기록을 하려면 배터리소모, 데이터 크기의 증가, 그리고 고성능 컴퓨팅의 요구와 같은 문제점을 고려해야 하며, 이러한 문제점은 수집주기를 최적화함으로써 해결가능하다. 본 논문에서는, 적절한 정확도를 유지하는 최적화된 수집주기를 제안하기 위해 실제 일상생활에서 스마트폰을 이용하여 사용자의 행동을 수집하고 기록하는 실험을 진행하였다. 실험결과 앉기의 경우 32초, 걷기와 서기의 경우 8초의 수집주기 내에서 약 80% 이상의 분류 정확성을 보이고 있음을 확인하였다. 결론적으로 앉기, 걷기, 서기와 같은 정도의 사용자의 행동을 일상생활에서 기록하기 위한 최적의 수집주기는 8초로 고려된다. 이러한 결론은 스마트폰을 이용한 디지털 문진표에 사용될 수 있다.
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