Gathering, connecting, integrating

Big Data Semantics in Industry 4.0

The Industry 4.0 is a vision that includes connecting more intensively physical systems with their virtual counterparts in computers. This computerization of manufacturing will bring many advantages, including allowing data gathering, integration and analysis in the scale not seen earlier. In this paper we describe our Semantic Big Data Historian that is intended to handle large volumes of hete...

On r-Gatherings on the Line

Given an integer r, a set C of customers, a set F of facilities, and a connecting cost co(c, f) for each pair of c ∈ C and f ∈ F , an r-gathering of customers C to facilities F is an assignment A of C to open facilities F ′ ⊂ F such that r or more customers are assigned to each open facility. We wish to find an r-gathering with the minimum cost, where the cost is maxci∈C{co(ci, A(ci))}. When al...

Planning for Information Gathering A Tutorial Survey

We discuss the problem of information gathering which is that of integrating mul tiple heterogeneous information sources so they appear as a single information source that a user can pose queries on We characterize information gathering as being made up of two subproblems query planning and plan execution Query planning is the process of searching through the space of rewrites of the original q...

Integrating DDI 3-based Tools with Web Services: Connecting Colectica and eXist-db

Integrating Planning and Execution for Information Gathering

Current specialized planners for query processing are designed to work in local, reliable, and predictable environments. However, there are a number of problems that arise in gathering information from large networks of distributed information. In this environment actions can be executed in parallel to exploit distributed resources, new goals come into the system in the midst of execution, acti...