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Thesis (Ph.D.)--Hong Kong University of Science and Technology, 2006. / Includes bibliographical references. Also available in electronic version.

Thesis (M.Phil.)--Hong Kong University of Science and Technology, 2006. / Includes bibliographical references (leaves 106-110). Also available in electronic version.

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This dissertation provides evidence that information displays to support procedure following can aid performance and increase situational awareness and safety. The intent of such displays is to assist operators in not only following operational procedures, but also in comprehending the context of the procedures, enabling them to understand why, when, and how to deviate from the procedures if necessary. The results of the dissertation research show that the addition of procedure context increases situation awareness and reduces procedure-following errors, which has been shown to be a significant causative factor for accidents in aviation and other domains. In addition, a pilots ability to comprehend noncompliance appears to be limited, despite their interest in (and ability to) detect noncompliance. Pilots do not appear be able to interpret the consequences of that noncompliance, suggesting that the design of displays and procedures should assist them in doing so. The results also demonstrate that pilots attempted to use procedure information even when clearly outside the scope of the procedure. This means that procedures and procedure-support aids should consider operation outside of its normal bounds in their design, rather than only for nominal operation as is currently the case.

In this thesis we report on remote interaction techniques for horizontal and vertical large displays. For vertical large displays, we present MultiPoint, a set of perspective-based remote pointing techniques that allows users to perform bimanual and multi-finger remote manipulation of graphical objects on large displays. We conducted two empirical studies that compared remote pointing techniques performed using fingers and laser pointers, in single and multi-finger pointing interactions. The MultiPoint techniques were found suitable for interacting with vertical large displays. We explore techniques that are well suited for exclusively single-point use cases as well as for multipoint scenarios. With Pointable, we also explored perspective-based pointing with in-air gestures, but in a tabletop scenario. We conducted 3 experiments; the first showed that pointing at a distance using Pointable has a Fitts’ law throughput comparable to that of a mouse. In the second experiment, we found that Pointable had the same performance as multi-touch input in a resize, rotate and drag task. In a third study, we observed that when given the choice, over 75% of participants preferred to use Pointable over multi-touch for target manipulation. In general, Pointable allowed users to manipulate out-of-reach targets, without loss of performance, while minimizing the need to lean, stand up, or involve collocated collaborators. / Thesis (Master, Computing) -- Queen's University, 2012-06-08 11:59:53.418

Advances in display technology are increasing screen size and reducing their costs. Large, wall sized screens can be found in malls, public squares and office buildings displaying photos, videos, advertising, news and announcements. The audience of large displays in public, urban environments can be constantly changing and in this thesis we investigate applying automated layout algorithms to large displays to adapt layouts to changing audiences. Abstract We review current automated layouts, discuss new challenges when applying automated layouts to large screens and present our design space for automated layouts. We investigate the human factors (such as attention, vision, and perception) and the system factors (such as display space and input devices) involved in automated layout for large displays. Abstract This thesis presents the Viewer Aware Layout (VAL) system. VAL is a system that automates the layout of images on a large display and is designed to allow many users to collectively view images. VAL, and features of VAL, are tested for engagement and it is found that there is a significant increase in agreement by users with statements describing an engaging experience when VAL is applied to an image layout. This thesis concludes with a summary of the research contributions and proposes future areas of work.

Currently, alignment films for use in liquid crystal displays are produced via a mechanical rubbing process. The dust produced by mechanical rubbing along with problems due to friction and uneven roller pressure lead to defects in the display. Therefore a novel method for aligning polymers films by irradiation with polarised light has been attempted. Anisotropy introduced into the films by selective irradiation affects liquid crystal alignment. The polymers used in this study are poly (vinyl cinnamate), poly (9- anthraceneoate ethyl methacrylate) and poly (p-azidobenzoate ethyl methacrylate). Poly (vinyl cinnamate) is a classical photoresist polymer which undergoes a [2+2] photocycloaddition in the presence of UV light. Poly (9-anthraceneoate ethyl methacrylate) and poly (p-azidobenzoate ethyl methacrylate) are both novel polymers which have the potential to undergo photo-crosslinking reactions. Poly (9-anthraceneoate ethyl methacrylate) contains an anthracene-terminated side chain which dimerises under the influence of UV light introducing anisotropy into the system. Poly (p-azidobenzoate ethyl methacrylate) contains an azido group which when irradiated with polarised light loses nitrogen to yield nitrenes which can combine to form azobenzene species. UV spectroscopy, infrared dichroism studies, birefringence measurements and fabrication of a simple liquid crystal cell show that poly (vinyl cinnamate) and poly (9-anthraceneoate ethyl methacrylate) undergo selective photoreaction. Poly (p- azidobenzoate ethyl methacrylate) is shown to undergo reaction but not to give the desired products.

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