Hisashi Aoki

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Context awareness is an important functionality for wearable computers. In particular, the computer should know where the person is in the environment. This paper proposes an image sequence matching technique for the recognition of locations and previously visited places. As in single word recognition in speech recognition, a dynamic programming algorithm(More)
Context awareness is an important functionality for wearable computers. In particular, the computer should know where the person is in the environment. This paper proposes an image sequence matching technique for the recognition of locations and previously visited places. As in single word recognition in speech recognition, a dynamic programming algorithm(More)
The effects of pre-motion silent period (PSP) on dynamic force exertion were studied in ten healthy subjects performing ballistic elbow extensions. The experiments were designed to evaluate the significance of mean differences between the averaged dynamic force curves of two groups: PSP-presence groups and PSP-absence groups. The presence of PSP was judged(More)
(1) To delineate the cortical and spinal excitability during the pre-movement silent period (PMSP), the motor-evoked potentials (MEPs) and H-reflexes were measured for 0-150 ms prior to rapid voluntary movements of 11 healthy subjects. The appearance of PMSP was judged from the electromyogram of the agonist muscle at each rapid movement and the differences(More)
OBJECTIVES Skin potential responses (SPRs) to target and non-target stimuli in letter recognition tasks were studied to evaluate their potential as communication channels for individuals with severe motor disability. METHODS SPRs were recorded from the palm or sole of 5 subjects with cerebral palsy and 6 healthy subjects. Subjects discriminated target(More)
An important function for wearable computers is the recognition of places and locations. This paper proposes an image sequence matching technique for the recognition of previously visited places. Similar in spirit to single word recognition in speech recognition, a dynamic programming algorithm is proposed for the calculation of dissimilarities of video(More)
We compared the single motor unit (SMU) activity between movements with a premotion silent period (PMSP) and without PMSP in EMG. Fourteen SMUs in the gastrocnemius muscle and 6 SMUs in the soleus muscle were recorded from 5 volunteers during isometric plantar flexion. Tonically firing SMUs failed to fire just before the onset of a rapid contraction with(More)
PURPOSE This study assessed the reproduction of excursive tooth contacts with a SAM2 "P" articulator set up with the aid of computerized axiography. MATERIAL AND METHODS Articulator excursive tooth contacts were compared with intraoral excursive contacts identified with occlusogram wax. The maxillary casts were mounted with a kinematic face-bow, and the(More)