Papers by Biswanath Dutta
Today's technology enhanced e-Governance system is lacking the concept of resource sharing and op... more Today's technology enhanced e-Governance system is lacking the concept of resource sharing and operation integration, concept of collaborative work, etc. A citizen has to go through all the related services to satisfy his particular needs, which takes lot of time. Semantic Web Service (SWS) has the potential to overcome these problems. It can automatically compose Web Services through automatic discovery, selection and execution of Web Services. This paper discusses about the motivation for SWS based e-Governance services, shows a semantic e-Governance conceptual architecture. Also illustrates a building block of e-Governance portal using IRS-III. Presents a use case scenario in the context of Indian agricultural market.
We concentrate on the use of ontologies for the categorization of objects, e.g., photos, books, w... more We concentrate on the use of ontologies for the categorization of objects, e.g., photos, books, web pages. Lightweight ontologies are ontologies with a tree structure where each node is associated a natural language label. Faceted lightweight ontologies are lightweight ontologies where the labels of nodes are organized according to certain predefined patterns which capture different aspects of meaning, i.e., facets. We introduce facets based on the Analytico-Synthetic approach, a well established methodology from Library Science which has been successfully used for decades for the classification of books. Faceted lightweight ontologies have a well defined structure and, as such, they are easier to create, to share among users, and they also provide more organized input to semantics based applications, such as semantic search and navigation.
Space, together with time, is one of the two fundamental dimensions of the universe of knowledge.... more Space, together with time, is one of the two fundamental dimensions of the universe of knowledge. Geo-spatial ontologies are essential for our shared understanding of the physical universe and to achieve semantic interoperability between people and between software agents. In this paper we propose a methodology and a minimal set of guiding principles, mainly inspired by the faceted approach, to produce high quality ontologies in terms of robustness, extensibility, reusability, compactness and flexibility. We demonstrate - with step by steps examples - that by applying the methodology and those principles we can model the space domain and produce a high quality facet-based large scale geo-spatial ontology comprising entities, entity classes, spatial relations and attributes.
Geo-spatial ontologies provide knowledge about places in the world and spatial relations between ... more Geo-spatial ontologies provide knowledge about places in the world and spatial relations between them. They are fundamental in order to build semantic information retrieval systems and to achieve semantic interoperability in geo-spatial applications. In this paper we present GeoWordNet, a semantic resource we created from the full integration of GeoNames, other high quality resources and WordNet. The methodology we followed was largely automatic, with manual checks when needed. This allowed us accomplishing at the same time a never reached before accuracy level and a very satisfactory quantitative result, both in terms of concepts and geographical entities.
This paper describes the results of a study whose goal is to analyze, evaluate and understand the... more This paper describes the results of a study whose goal is to analyze, evaluate and understand the use of semantics in social networks. As a paradigmatic example, the study concentrates on a fairly large portion of the tags used in del.icio.us (more than 5,000 tags). The results show that semantics are pervasively used. In particular, the large majority (in our experiment, 75%) of the tags are subject related and directly codify the semantics of the resource. Furthermore, the number of tags which are effectively used is only a small proportion of the overall tag set (in our experiment around 30% of the tags covers around 95% of the resources), and these tags tend to remain stable in time, despite the continuous growth of the number of tags and resources being indexed. Finally, it is possible to identify an implicit use of hierarchical relationships (i.e., lightweight ontologies) among the concepts denoted by the terms used.
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Papers by Biswanath Dutta