Sensor-based trip-separation method based on ergodic HMM. - Hiroki Ohashi; Phong Xuan Nguyen; Takayuki Akiyama; Masaaki Yamamoto; Akiko Sato (IWCTS@SIGSPATIAL, 2014)

User-friendly activity recognition using SVM classifier and informative features. - Phong Xuan Nguyen; Takayuki Akiyama; Hiroki Ohashi; Goh Nakahara; Katsuya Yamasaki; Saito Hikaru (IPIN, 2015)

User-friendly heading estimation for arbitrary smartphone orientations. - Phong Xuan Nguyen; Takayuki Akiyama; Hiroki Ohashi; Goh Nakahara; Katsuya Yamasaki; Saito Hikaru (IPIN, 2016)

Trip-Extraction Method Based on Characteristics of Sensors and Human-Travel Behavior for Sensor-Based Travel Survey. - Hiroki Ohashi; Phong Xuan Nguyen; Takayuki Akiyama; Masaaki Yamamoto; Akiko Sato (J. Inf. Process., 2016)

Hierarchical Model for Zero-shot Activity Recognition using Wearable Sensors. - Mohammad Al-Naser; Hiroki Ohashi; Sheraz Ahmed; Katsuyuki Nakamura; Takayuki Akiyama; Takuto Sato; Phong Xuan Nguyen; Andreas Dengel 001 (ICAART (2), 2018)

Experience Filtering for Robot Navigation using Deep Reinforcement Learning. - Phong Xuan Nguyen; Takayuki Akiyama; Hiroki Ohashi (ICAART (2), 2018)

Vehicle's Weight Estimation Using Smartphone's Acceleration Data to Control Overloading. - Phong Xuan Nguyen; Takayuki Akiyama; Hiroki Ohashi; Masaaki Yamamoto; Akiko Sato (Int. J. Intell. Transp. Syst. Res., 2018)

Indoor crowd density estimation for efficient monitoring system. - Phong Xuan Nguyen; Takayuki Akiyama (IPIN (Short Papers/Work-in-Progress Papers), 2019)