Mobile and wearable computers present input/output problems due to limited screen space and interaction techniques. When mobile, users typically focus their visual attention on navigating their environment - making vi...
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ISBN:
(纸本)9781581136302
Mobile and wearable computers present input/output problems due to limited screen space and interaction techniques. When mobile, users typically focus their visual attention on navigating their environment - making visually demanding interface designs hard to operate. This paper presents two multimodal interaction techniques designed to overcome these problems and allow truly mobile, 'eyes-free' device use. The first is a 3D audio radial pie menu that uses head gestures for selecting items. An evaluation of a range of different audio designs showed that egocentric sounds reduced task completion time, perceived annoyance, and allowed users to walk closer to their preferred walking speed. The second is a sonically enhanced 2D gesture recognition system for use on a belt-mounted PDA. An evaluation of the system with and without audio feedback showed users' gestures were more accurate when dynamically guided by audio-feedback. These novel interaction techniques demonstrate effective alternatives to visual-centric interface designs on mobile devices.
The various aspects of the MIND project, which gives the user the impression of dealing with a homogeneous multimedia digital library, are discussed. With thousands of digital libraries (DL) in the web, a user has to ...
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The various aspects of the MIND project, which gives the user the impression of dealing with a homogeneous multimedia digital library, are discussed. With thousands of digital libraries (DL) in the web, a user has to select relevant DL, reformulate the query with respect to each DL, and reorganize the different results. The EU project MIND attempts to overcome the ineffective manual tasks and all required steps are done automatically and invisible to a user. Different user interfaces can be connected to the MIND backend. Within the project, a HTML-based and two Java-based UIs have been developed.
The technique for resource selection and data fusion in multimedia distributed digital libraries was described. The data fusion combines the results from multiple search engines into a unified list. The best performin...
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The technique for resource selection and data fusion in multimedia distributed digital libraries was described. The data fusion combines the results from multiple search engines into a unified list. The best performing method for estimating retrieval quality assumes that the indexing weights follow a normal distribution which lead to a normal distribution for the document scores. The local search on retrieved headlines was found to be the most cost effective and efficient method.
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