User interfaces can improve task performance by exploiting the powerful human capabilities for spatial cognition. This opportunity has been demonstrated by many prior experiments. It is tempting to believe that provid...
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ISBN:
(纸本)1581134533
User interfaces can improve task performance by exploiting the powerful human capabilities for spatial cognition. This opportunity has been demonstrated by many prior experiments. It is tempting to believe that providing greater spatial flexibility-by moving from flat 2D to 3D user interfaces-will further enhance user performance. This paper describes an experiment that investigates the effectiveness of spatial memory in real-world physical models and in equivalent computer-based virtual systems. The different models vary the user's freedom to use depth and perspective in spatial arrangements of images representing web pages. Results show that the subjects' performance deteriorated in both the physical and virtual systems as their freedom to locate items in the third dimension increased. Subjective measures reinforce the performance measures, indicating that users found interfaces with higher dimensions more 'cluttered' and less efficient.
This paper reports on the development of a visual search interface (called “SearchKids") to support children ages 5-10 years in their efforts to find animals in a hierarchical information structure. This search ...
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In this paper, the authors propose Zoomable User Interfaces as an alternative presentation medium to address several common presentation problems. Zoomable User Interfaces offer new techniques for managing multiple ve...
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Gesture based interfaces promise to increase the efficiency of user input, particularly in mobile computing where standard input devices such as the mouse and keyboard are impractical. This paper describes an investig...
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This paper describes the evaluation of a gesture-based mechanism for issuing the back and forward commands in web navigation. Results show that subjects were able to navigate significantly faster when using gestures c...
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ISBN:
(纸本)1581134541
This paper describes the evaluation of a gesture-based mechanism for issuing the back and forward commands in web navigation. Results show that subjects were able to navigate significantly faster when using gestures compared to the normal back button. They were also extremely enthusiastic about the technique, with several expressing their wish that "all browsers should support this".
This paper describes a pattern classification approach for detecting frontal-view faces via learning a decision boundary. The classification can be achieved either by explicit estimation of density functions of two cl...
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This paper describes a pattern classification approach for detecting frontal-view faces via learning a decision boundary. The classification can be achieved either by explicit estimation of density functions of two classes, face and non-face or by direct learning of a classification function (decision boundary). The latter is a more effective approach, when the number of training available examples is small, compared to the dimensionality of image space. The proposed method consists of a implicit modeling of both face and near-face classes using Independent Component Analysis (ICA), and a subsequent classification stage based on the decision boundary estimation using Support Vector Machine (SVM). Multiple nonlinear SVMs are trained for local subspaces, considering the general non-Gaussian and multi-modal characteristic of face space. This parallelization of SVMs reduces computational cost of on-line classification, since the locally trained SVM has small number of support vectors compared to the SVM trained on entire data space. We showed that the proposed algorithm is superior to the simple combination of ICA and SVM, both in accuracy and computational burden.
Identification of patterns in time series data sets is a task that arises in a wide variety of application domains. This paper presents a user interface for the timebox query model of rectangular regions that specify ...
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ISBN:
(纸本)1581134541
Identification of patterns in time series data sets is a task that arises in a wide variety of application domains. This paper presents a user interface for the timebox query model of rectangular regions that specify constraints over time series data sets. A prototype application based on timeboxes is presented. Collaborations with potential users will guide the design of enhanced functionality. Usability tests and controlled experiments will be conducted to evaluate the timebox query model.
For applications such as video surveillance and humancomputer inter/ace, we propose an efficiently integrated method to detect and track faces. Various visual cues are combined to the algorithm: motion, skin color, g...
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In this workshop, we propose to bring together researchers from industry and academia to discuss the design of new technologies for families. We will focus on both design techniques and the technologies themselves. Th...
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ISBN:
(纸本)1581134541
In this workshop, we propose to bring together researchers from industry and academia to discuss the design of new technologies for families. We will focus on both design techniques and the technologies themselves. Through discussions and brainstorming we hope to discover new ideas, which can be disseminated more broadly.
A dynamic query interface for finding patterns in time series data is demonstrated. The identification of patterns in time series data sets is a task that arises in a wide variety of application domains. It is reporte...
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ISBN:
(纸本)1581134541
A dynamic query interface for finding patterns in time series data is demonstrated. The identification of patterns in time series data sets is a task that arises in a wide variety of application domains. It is reported that this demonstration presents the timebox model of rectangular regions that specify constraints for dynamic queries over time series data sets, and the TimeSearcher application, which uses timeboxes as the basis of an interactive query tool.
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