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Continuous advances in computer technology are making it possible to construct virtual environments with an ever-increasing sense of visual realism. What is lacking are interfaces that allow users to manipulate virtual objects in an intuitive manner. In this paper, we present a 7 DOF tension-based haptic interface that allows users to not only grip an(More)
The paper aims to present a new human-scale haptic device for virtual environment named Scaleable-SPIDAR (Space Interface Device for Artificial Reality), which provide to both hands different aspects of force feedback sensations, associated mainly with weight, contact and inertia within a cave-like space. Tensioned string techniques are used to generate(More)
Viewing angle performance in in-plane switching liquid crystal displays (IPS-LCDs) has been greatly improved, using two technologies. One is optical compensation technology using a biax-ial film. The other is a newly developed IPS-Pro cell structure with higher transmission efficiency. These technologies are successfully introduced into the fabrication of(More)
Tree roots in forest soils can be detected using nondestructive ground-penetrating radar (GPR). However, few studies have investigated root detection frequency; i.e., how many and which roots are identified in a radar profile out of the total quantity of roots present in a forest stand. The objective of this study was to quantify root detection frequency(More)
Ground-penetrating radar (GPR) has been applied to detect coarse tree roots. The horizontal angle of a root crossing a scanning line is a factor that affects both root detection and waveform parameter values. The purpose of this study was to quantitatively evaluate the influence of root orientation (x, degree) on two major waveform parameters, amplitude(More)