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Following legislation making provision for vision screening for regular DSE users, research compared six types of vision screening systems to each other and to a full Optometric eye examination. Of these, the first two were computer based screeners, the remainder were stand alone units. The aim was to compare measures of visual function using each of the screeners to each other and to Optometric...
Various human factors experiments were carried out aiming at investigating to what extent assumed deficiencies of current videocommunications systems can be overcome by employing advanced image technologies. Deficiencies that are dealt with are the lack of spatial impression, limitations in the possibility of addressing the interlocutors individually by non-verbal signals, and difficulties in terms...
Ongoing developments in information technology have led to an increasing demand for 3-D displays. Indeed, a broad range of fairly mature 3-D equipment is already on the market. The available systems, however, suffer from the drawback that users have to wear special devices to separate the left eye's and right eye's images. Such aided viewing systems have been firmly established in many professional...
We report an experiment which investigated the performance and workload effects associated with the functional grouping of automated displays in a multi-task flight simulation. Eleven rated pilots performed tracking, systems monitoring, and target acquisition sub-tasks in manual conditions and when the targeting task was automated. In the latter condition, the target acquisition display was relocated...
Future motor vehicles will provide the driver with advanced information systems displaying potentially complex information. This has led to concerns over the amount of graphical information which can be safely presented to a driver. This paper describes an experimental study to derive measures of graphical complexity. This was done within the context of a driving task, using experimental stimuli...
This paper describes how, in a consumer television application, the glass transmission coefficient of a CRT (or plasma) display should vary as a function of the illumination level (measured on the display) in order to obtain optimal perceived quality. The study was concerned with the perceptual evaluation of five identical television sets, but with different glass transmission coefficients, on quality...
This paper discusses the perception of depth in stereoscopic displays, with an emphasis on the validity of depth perception. The paper presents the idea that stereoscopic depth perception involves a number of processing steps such as detecting disparity and perceptual rescaling of disparity for different viewing distances to yield perceived depth. The paper concludes with several ideas relating...
An efficient multimedia data handling is a fundamental requirement of mobile multimedia applications. To accommodate this requirement, issues of the available technologies as well as mobile multimedia data access and transfer processes, and the characteristics of the medium to be handled should all be taken into consideration. For this end, these aspects are investigated. The results of the investigation...
In this paper we try to identify some user expectations that could drive the formal assessment of the requirements for an intelligent blackboard. We proceed by proposing some scenarios and the features suggested by these scenarios for an intelligent blackboard. Finally, we consider both the hardware and software developments that could lead to such a product in the future.
This paper describes the main issues regarding the development of a portable system capable of making wireless connections to a TCP/IP network for real-time video delivery. Compression is used along with packet radio technology, providing a fully mobile and compact device. It is expected that using such a device, one camera-person will be able to make a report with his/her camera attached to a small...
This paper presents a desktop virtual reality system featuring head-coupled movement parallax on three orthogonal screens. Virtual objects are displayed in front of the screens and are thus accessible to the user's hand. As the three-dimensional impression is based on movement parallax rather than stereo, very little headware is required. Although currently limited to visualization, the system...
This paper describes work undertaken as part of a three-stranded project. The main deliverable will be a suite of software tools, classes and components, as well as teaching resources and methodologies to facilitate the production of intelligent multimedia tutoring systems.The three strands of this project explore differing aspects of multimedia, and while they stand as separate pieces of work in...
This paper presents the investigation of a head-mounted display as an innovative interface on the shop floor. The display used is voice controlled and designed to support operators of next-generation manufacturing systems in critical supervisory tasks. The connection of the display to a modern numerical control is explained from a technical point of view. A usability study is presented, which investigates...
The concept of a virtual lecture theatre has been realised at the Faculty of Economics, Business Administration and Social Sciences in Nuremberg since 1995. Interdisciplinary courses are being held for local students at one faculty and are interactively broadcast for students joining in from remote locations. Various demands concerning the teleteaching environment have to be met in order to enable...
With ever increasing amounts of visual information to take in when interacting with computers, users can become overloaded. One reason is that computers communicate solely by graphical output. This paper suggests the use of non-speech sound output to enhance the graphical display of information to overcome overload. The question is how to integrate the display of sound and graphics to capitalise...
The main objective of this paper is to provide an optimal way for students to control a computer-based teacher and interact with it. From previous experience, we took a special interest in improving the navigation through tutorial systems, and also in the evaluation techniques, designing and developing a new tutorial based on an open architecture. After implementing the tutorial prototype, it was...
Distance learning course providers world-wide are looking to new technology to enhance the presentation of their courses. Projects investigating how tutors teach and students learn when courses adopt new technology methods are of paramount importance. M205-STILE (Students' and Teachers' Integrated Learning Environment) is one such project which piloted the use of conferencing and World Wide Web...
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