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Systematic error in judging distances in virtual environments is one of the most interesting problems in perceptual studies of virtual environments. The causes of this error are not known. This paper presents an experiment designed to investigate distance perception in virtual environments using the method of distance bisection (fractionation). Most other(More)
This paper evaluates the combination of two methods for adapting bipedal locomotion to explore virtual environments displayed on head-mounted displays (HMDs) within the confines of limited tracking spaces. We combine a method of changing the optic flow of locomotion, effectively scaling the translational gain, with a method of intervening and manipulating a(More)
In this paper, we use an immersive virtual environment to assess the separation, or "gap," between moving vehicles that people need before initiating a street crossing in a roundabout, where traffic can be approaching from several directions. From a pedestrians viewpoint, crossing at a roundabout can represent a more complex decision than at a normal linear(More)
This study aims to explore the application values of traditional ultrasound (contrast ultrasound [CUS]) and ultrasound elastography (UE) (including gray-scale ultrasound, color Doppler flow imaging, spectral Doppler ultrasound) in the diagnosis of breast masses. Postoperative histopathological diagnosis was used as the gold standard. One hundred seventy(More)
This paper presents a mixed reality system for combining real robots, humans, and virtual robots. The system tracks and controls physical robots in local physical space, and inserts them into a virtual environment (VE). The system allows a human to locomote in a VE larger than the physically tracked space of the laboratory through a form of redirected(More)
OBJECTIVES Osteosarcoma (OsC) is the most common primary bone malignant tumor with lower incidence and high degree of malignancy, but the exact mechanism remains unknown. More evidence demonstrated microRNAs (miRNAs) could contribute to tumor progression. In this study, we investigated the expression and functions of miR-320 in OsC cells. MATERIALS AND(More)
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