Policy-based management systems use declarative rules to govern their operation whilst satisfying the goals of the system. One of the fundamental issues in policy engineering remains the inability to automatically ref...
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This paper presents an anatomy of Hypertext 2011 - focusing on the dynamic and static behavior of the participants. We consider data collected by the CONFERATOR system at the conference, and provide statistics concern...
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ISBN:
(纸本)9781450313353
This paper presents an anatomy of Hypertext 2011 - focusing on the dynamic and static behavior of the participants. We consider data collected by the CONFERATOR system at the conference, and provide statistics concerning participants, presenters, session chairs, different communities, and according roles. Additionally, we perform an in-depth analysis of these actors during the conference concerning their communication and track visiting behavior. Copyright 2012 ACM.
In this paper, we analyze the stability of user interaction within Twitter focusing on link decay prediction: for a tweet created by one user mentioning another user we study the task of predicting the decay of the co...
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Social tagging systems have established themselves as an important part in today's web and have attracted the interest of our research community in a variety of investigations. Henceforth, several assumptions abou...
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Collective intelligence can be considered as an emerging phenomenon contained in many interactions concerning social networks and social media. A very intuitive notion considers the term as a collective of individuals...
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ISBN:
(纸本)9781450314022
Collective intelligence can be considered as an emerging phenomenon contained in many interactions concerning social networks and social media. A very intuitive notion considers the term as a collective of individuals doing things together that seem intelligent. This paper discusses collective intelligence in social media from an application perspective in the context of real-world systems utilizing collective intelligence in social media. Copyright 2012 ACM.
Social media as well as mobile devices have woven themselves into everyday life, mediating various implicit and explicit social interactions. The analysis and modeling of the interaction data, including both physical ...
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ISBN:
(纸本)9781450320078
Social media as well as mobile devices have woven themselves into everyday life, mediating various implicit and explicit social interactions. The analysis and modeling of the interaction data, including both physical and online social interactions is receiving increasing interest. A prerequisite is then given by effective approaches for data collection, covering both sensor data and social media artifacts. This paper describes the Sensor data Collection Framework (SDCF), a compact, versatile and easily extensible open source framework for mobile sensing and ubiquitous data collection. It provides an overview on core concepts and architecture. Furthermore, we discuss first experiences and results of applying the framework in a collaborative workgroup context. Copyright 2013 ACM.
A key advantage of Adaptive Hypermedia Systems (AHS) is their ability to re-sequence and reintegrate content to satisfy particular user needs. However, this can require large volumes of content, with appropriate granu...
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ISBN:
(纸本)9781450313353
A key advantage of Adaptive Hypermedia Systems (AHS) is their ability to re-sequence and reintegrate content to satisfy particular user needs. However, this can require large volumes of content, with appropriate granularities and suitable meta-data descriptions. This represents a major impediment to the mainstream adoption of Adaptive Hypermedia. Open Adaptive Hypermedia systems have addressed this challenge by leveraging open corpus content available on the World Wide Web. However, the full reuse potential of such content is yet to be leveraged. Open corpus content is today still mainly available as only one-size-fits-all document-level information objects. Automatically customizing and right-fitting open corpus content with the aim of improving its amenability to reuse would enable AHS to more effectively utilise these resources. This paper presents a novel architecture and service called Slicepedia, which processes open corpus resources for reuse within AHS. The aim of this service is to improve the reuse of open corpus content by right-fitting it to the specific content requirements of individual systems. Complementary techniques from Information Retrieval, Content Fragmentation, Information Extraction and Semantic Web are leveraged to convert the original resources into information objects called slices. The service has been applied in an authentic language elearning scenario to validate the quality of the slicing and reuse. A user trial, involving language learners, was also conducted. The evidence clearly shows that the reuse of open corpus content in AHS is improved by this approach, with minimal decrease in the quality of the original content harvested. Copyright 2012 ACM.
This paper proposes a novel method to represent user models in a multilingual manner which caters for multilingual Web search users. Furthermore, an evaluation is presented which examines a result re-ranking algorithm...
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This paper proposes a novel method to represent user models in a multilingual manner which caters for multilingual Web search users. Furthermore, an evaluation is presented which examines a result re-ranking algorithm that is based upon that model.
Communities are a central aspect in the formation of social interaction networks. In this paper, we analyze the evolution of communities in networks of face-to-face proximity. As our application context, we consider f...
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Ubiquitous computing (ubicomp), as envisaged by Weiser [22], is heavily user-centric and largely concerned with applications specifically designed to meet end-user needs. Sensor populated ubicomp environments differen...
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ISBN:
(纸本)9789639799455
Ubiquitous computing (ubicomp), as envisaged by Weiser [22], is heavily user-centric and largely concerned with applications specifically designed to meet end-user needs. Sensor populated ubicomp environments differentiate these applications from existing mobile and distributed systems through context awareness. For the system developer, the problems of heterogeneity and scalability are felt most keenly when designing this adaptive behaviour. A context-aware ubicomp system needs to operate reliably over the wide variety of situations that may be encountered. In this paper we present a technical architecture which has been implemented to support scalable, cost-effective, runtime experimentation using a framework of models to support informed decision making in an iterative design cycle.
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