We will develop a probabilistic active knowledge base system for observational data. It is intended to provide decision support for users utilising the data sources which exhibit the characteristics as described in our motivating example. The system will be active because when applicable, it will take advantage of the programmability of sensor networks to actively manage the data sources. It wi...

Schema mapping that provides a unified view to the users is necessary to manage schema heterogeneity among different data sources. Schema matching is a required task for schema mapping that finds semantic correspondences between entity pairs of schemas. Semi-automatic schema matching systems were developed to overcome manual works for schema mapping. However, such approaches require a high manu...

a branch of the question of holy imams’ knowledge is sources of their knowledge. knowledge of sources of imams’ knowledge is a clear criterion for kind of encountering their words. in hadiths, a writing called al-jami‘a, sometimes named al-sahifa, is considered among sources of imams’ knowledge. along with “thousand doors of knowledge,” al-jami‘a is one of imam ali’s two main sources of knowled...

Knowledge aggregation is the problem of taking information from multiple heterogeneous sources and aggregating it into a unified knowledge base. One of the main challenges in that work has been dealing with data incompleteness because data sources seldom contain complete answers to a user’s query. Current approaches leverage users’ preferences over data sources when trying to aggregate incomple...