Sang-Jun Kim

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Some issues on direct-projected augmented reality (DirectAR) are addressed: the projection may be geometrically distorted due to the non-planar surface (geometric distortion); the projection cannot be seen to user as intended because the position of the projector is not the same as that of the user's viewpoint (viewpoint-ignorant projection); the projection(More)
In projection-based augmented reality, specular reflection may distract the users. This paper demonstrates that the specular reflection can be eliminated by redundantly illuminating the projection surface using multiple overlapping projectors mounted at different locations. Our initial system using two projectors is presented. The system automatically(More)
In direct-projected augmented reality, use of projector makes it possible to utilize 3-D real and large objects as displays and frees from discomforts incidental to wearing a device such as HMD. However, the resulting augmentation usually has poor depth resolution due to projectors with low contrast. In direct-projected augmented reality, the radiometric(More)
OBJECTIVE The purpose of this study was to evaluate the efficacy of gastrocnemius and soleus muscle length measured by gait analysis for characterizing the spastic calf muscles in ambulant cerebral palsy. METHODS A total of 20 limbs in the 16 children with diplegic or hemiplegic cerebral palsy showing spasticity of the calf muscle were analyzed by(More)
We make an all-order analysis to establish the precise correspondence between nonrelativistic Chern-Simons quantum field theory and an appropriate first-quantized description. Physical role of the field-theoretic contact term in the context of renormalized perturbation theory is clarifed through their connection to self-adjoint extension of the Hamiltonian(More)
Methicillin-resistant Staphylococcus aureus (MRSA) has been emerging worldwide as one of the most important problems in communities and hospitals. Therefore, new agents are needed to treat acute oral infections from MRSA. In this study, antibacterial compounds from the roots of Atractylodes japonica (A. japonica) were isolated and characterized. The(More)