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The increasing popularity of mobile devices has fostered the development of visualization applications for these devices. However, the reduced screen size and different interaction devices, which people are not familiarized, present some challenges to visualization in a mobile environment. This paper describes how, as a proof of concept, a combination of two different techniques can reduce the over...
Managing photos by using visual features (e.g., color and texture) is known to be a powerful, yet imprecise, retrieval paradigm because of the semantic gap problem. The same is true if search relies only on keywords (or tags), derived from either the image context or user-provided annotations. In this paper we present a new multi-faceted image search and browsing system, named Scenique, that allows...
Logo detection is important for brand advertising and surveillance applications. The central issues of this technology are fast localization and accurate matching. Based on key traits analysis of common logos, this paper presents a two-stage detection scheme based on spatialspectral saliency (SSS) and partial spatial context (PSC). SSS speeds up logo location and avoid the impact of cluttered background...
Awareness systems are a class of computer mediated communication systems that help individuals or groups build and maintain a peripheral awareness of each other. In this paper a service-oriented platform is presented, that supports awareness and informal social communication between community members, distributed over multiple smart home environments. The ASTRA platform, developed in the context of...
When searching information a first and crucial step is query formulation. However it is a difficult task for users. This paper introduces a new approach to help users formulating their queries. It proposes to benefit from past search experiences to help users when formulating queries. The user can incrementally construct his query visualizing how other users have carried out searches with the terms...
Understanding software through dynamic analysis has been a popular activity in the past decades. One of the most common approaches in this respect is execution trace analysis: among our own efforts in this context is EXTRAVIS, a tool for the visualization of large traces. Similar to other trace visualization techniques, our tool has been validated through anecdotal evidence, but should also be quantitatively...
Visualizing an execution trace of an object-oriented system as sequence diagrams is effective to understand the behavior of the system. To support developers to understand concrete interaction among classes, our tool named OGAN extracts sequence diagrams representing interaction scenarios for a pair of classes specified by a user. OGAN classifies objects into groups based on their neighbor classes...
Daidalos II works towards its overall mission of providing a beyond 3G framework that is capable of supporting pervasive services built on network and service infrastructures for mobile end users. In order to validate such a framework, Daidalos worked towards the completion of a prototype demonstrator was verified on a Daidalos specific testbed infrastructure, enabling end user validation of the Daidalos...
For decades hypertext has provided a means for structuring information. Versioning has been perceived as very important for hypertext, but research focusing on it has targeted almost exclusively one type of hypertext application: navigational hypertext (i.e., node-link structures). Spatial hypertext is an alternative paradigm for associating information by spatial arrangements or visual cues. There...
We explore some of the characteristics of multimodal input interaction spaces for notification systems within a multi-tasking environment like a command and control center using two promising interaction methods: gestures and touch based input through a laboratory experiment comparing both techniques. Results of our study suggest that gestures are better suited for multi-tasking situations because...
Ontologies as a set of concepts and their relations have been proven useful in a wide range of areas. More importantly ontologies represent an essential technology for building semantic web applications. Help user orienting in a wide offering of ontologies on the Web is at root of making semantic Web practical. Thus, it is necessary to provide a simple, comprehensive and efficient tool to support...
Understanding the relationships between requirements is important in order to understand the requirements themselves. Existing requirements management tools mainly use lists, tables, trees, and matrices to visualize requirements and their interrelations. However, all these visualization forms have a limited capability to show multiple relationships of different types. In this paper, we propose to...
It is almost a truism that system stakeholders do not fully understand and communicate what they want, often until a system is produced and they see it isn't right. Such an outcome is wasteful, expensive, and unsatisfactory. Working with requirements in comic book style provides affordances, absent or weaker in other requirements forms, that may as- sist stakeholders in surfacing and expressing desires...
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