In this work we propose a new experimental paradigm in the context of human motor control. Human subjects track a target with a mouse-pointer on a computer screen while the underlying dynamics is similar to a stick-balancing problem. This approach gives wide control over system parameters. We show that there are two scaling regions in the power spectrum of the distance r between mouse and targe...

The generation and recognition of body language is a key technologies of VR. Sign Language is a visual-gestural language mainly used by hearing-impaired people. In this paper, gesture and facial expression models are created using computer graphics and used to synthesize Chinese Sign Language (CSL), and from it a human-computer CSL interaction system is implemented. Using a system combining CSL...

This paper presents a case study of two students aged 14-15, as they attempt to make sense of distribution, adopting a range of causal meanings for the variation observed in the animated computer display and in the graphs generated by the simulation. The students’ activity is analysed through dimensions of complex causality. The results indicate support for our conjecture that carefully designe...

We present a low-cost prototype system for real-time tracking of players during a sport event. The system was tested on recordings of a squash singles match. Two players are visible from bird’s eye perspective as they move around the squash court. System recovers position of each of the players on each frame and presents the results in real time on computer screen. Method for automatic tracker ...

The project focuses on the effects of visual delay on human controllers of remote artefacts. A review of the current literature has been carried out. A pilot experiment with thirty participants has been completed. The experiment consisted of a remotely controlled, wheeled vehicle being driven along a track towards a target. The vehicle had a video camera mounted on it from which images were sen...

As words fly onto the computer screen, revolve, and dissolve, image, sound, and movement enter school classrooms in ‘‘new’’ and significant ways, ways that reconfigure the relationship of image and word. In this paper I discuss these ‘‘new’’ modal configurations and explore how they impact on students’ text production and reading in English schools. I look at the changing role of writing on scr...

Time invested in education has been growing in recent years and it is a subject of interest not only for schools, but also for companies, due to the time and money saved because of a correct understanding of the development of an activity. To contribute to learning, different techniques for the development of learning objects have been investigated. Novel techniques involve the use of augmented...

This study aimed to determine the validity of the digital photocolorimetric (PCM) method in matching the color of human teeth. First, two Vitapan Classical shade guides, each containing 16 shade guide teeth, were visually shade matched, and digital photographs of each three pair of shade guide teeth were taken in a color matching booth. Secondly, visual shade matching of the upper central incis...

background and aims. digital imaging continues to gain acceptance in dentistry and video display used for this becomes important. the aim of this study was to assess the influence of the display monitor on observer performance on caries detection. materials and methods. artificial enamel lesions were created in 40 extracted teeth at random using 1/4 and 1/2 round burs. teeth were mounted in den...

OBJECTIVE:: The objectives were to determine the postural consequences of varying computer monitor height and to describe self-selected monitor heights and postures. DESIGN:: The design involved experimental manipulation of computer monitor height, description of self-selected heights, and measurement of posture and gaze angles. BACKGROUND: Disagreement exists with regard to the appropriate hei...