In recent years, numerous studies have been attempted to exploit ontology in the area of ubiquitous computing. Especially, some kinds of ontologies written in OWL are proposed for major issues in ubiquitous computing such like context-awareness. OWL is recommended by W3C as a descriptive language for representing ontology with rich vocabularies. However, developers struggle to design ontology u...

In this paper, ontology based dialogue strategies are presented in connection with the concept of communicative images. Communicative images are graphical objects integrated with a dialogue interface and linked to an associated knowledge database which stores the semantics of the objects depicted. The relevant pieces of information can be linked to the external knowledge distributed in a social...

Up-to-date geospatial information can help crisis management community to coordinate its response. In addition to data that is created and curated by experts, there is an abundance of user-generated, user-curated data on Social Web sites such as Flickr, Delicious, and Google Earth, that can be used to harvest knowledge to solve real-world problems. User-generated, or social, metadata can be use...

An otherwise promising business, political, or military strategy can be crippled by an incomplete understanding of the social-cultural factors that define and influence a region. Such omissions are sometimes due to oversight, but often stem from a fundamental lack of understanding of how to model such difficult and unfamiliar concepts. The information required to generate useful contextual mode...

There are two main traditions in defining a semantics for agent communication languages, based either on mental attitudes or on social commitments. These traditions share speech acts as operators with preconditions and effects, and agents playing roles like speaker and hearer, but otherwise they rely on distinct ontologies. They refer not only to either belief and intention or various notions o...

High quality software documentation is a substantial issue to understand software systems. Shorter time-to-market software cycles increase the importance of automatism to keep the documentation up to date. In this paper, we describe the automatic support of the software documentation process using a social semantic software approach. Therefore, we introduce a software documentation ontology as ...

In order to support informal learning, we complement the formal knowledge represented by ontologies developed by domain experts with the informal knowledge emerging from social tagging. To this end, we have developed an ontology enrichment pipeline that can automatically enrich a domain ontology using: data extracted by a crawler from social media applications, similarity measures, the DBpedia ...

With the success of social applications like Flickr, del.icio.us and YouTube, social software has become the focus of several research initiatives. Especially the idea of combining social and semantic aspects has been recently gaining significant attention in the semantic web community. In this paper we research and discuss the properties of metadata in social systems (folksonomies) compared to...

Knowledge workers have different applications and resources in heterogeneous environments for doing their knowledge tasks and they often need to solve a problem through combining several resources. Typical personal knowledge management (PKM) systems do not provide effective ways for representing knowledge worker’s unstructured knowledge or idea. In order to provide better knowledge activity for...