Advances in smartphones and location-based services have made it possible to use
technologies such as global position system (GPS) satellites, cell tower pings, and short …

최근 모바일 기기의 고도화 및 위성 기술의 발달에 따라, 모바일 단말에서 개인 위치의 수집이
용이해지고 있고, 이에 따라 개인 위치 정보 기반의 다양한 서비스들이 주목 받고 있다. 수집된 …

본 논문에서는 GPS 음영 지역에서 사용자의 위치 인식을 위해 추측 항법 기법을 이용하여
사용자의 이동 경로를 추적하는 중간 단계로써 스마트 폰의 내장된 가속도 센서와 나침반 …

This paper examines the use of geographical tracking system as a method of detecting
juvenile behaviors, while providing an extension to existing a mobile service which has …

For elderly people in regular daily activities, human position and motion trajectory can be
used as a description of behavioral characteristics. Base on the improved HMM model and …

The smart device is a personal device and has the ability to use built-in sensors. Therefore, it
is possible to provide individually customized services through recognizing the user's …

In this paper we introduce an unsupervised online clustering algorithm to detect abnormal
activities using mobile devices. This algorithm constantly monitors a user's daily routine and …

Recently, the advance of mobile devices has made various services possible beyond simple
communication. One of services is the predicting the future path of users and providing the …

As the popularity of mobile end devices is growing exponentially, the number of malicious
activities directed against them has also surged. People are using their mobile devices for …

Various attempts have been made to prevent crime risk. One of the cases where outdoor
pedestrians are attacked by criminals is the abnormal health condition. When a mental or …