1,691 research outputs found

    The accessibility dimension for structured document retrieval

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    Structured document retrieval aims at retrieving the document components that best satisfy a query, instead of merely retrieving pre-defined document units. This paper reports on an investigation of a tf-idf-acc approach, where tf and idf are the classical term frequency and inverse document frequency, and acc, a new parameter called accessibility, that captures the structure of documents. The tf-idf-acc approach is defined using a probabilistic relational algebra. To investigate the retrieval quality and estimate the acc values, we developed a method that automatically constructs diverse test collections of structured documents from a standard test collection, with which experiments were carried out. The analysis of the experiments provides estimates of the acc values

    The Future is Big Graphs! A Community View on Graph Processing Systems

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    Graphs are by nature unifying abstractions that can leverage interconnectedness to represent, explore, predict, and explain real- and digital-world phenomena. Although real users and consumers of graph instances and graph workloads understand these abstractions, future problems will require new abstractions and systems. What needs to happen in the next decade for big graph processing to continue to succeed?Comment: 12 pages, 3 figures, collaboration between the large-scale systems and data management communities, work started at the Dagstuhl Seminar 19491 on Big Graph Processing Systems, to be published in the Communications of the AC

    An event-driven approach to dynamic situation detection

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    To cope with the emerging demand for individual products and services, new approaches for handling the individualization in dynamic supply chains are needed. Our object of investigation is to establish Situation-awareness (SA) in an assistant information system for supply chain partners to cope with individualization-driven demands. Our contribution is an event-driven architecture design to enable situational planning using the Situation Calculus upon distributed contextual information. Sensors raise events among supply chain partner’s information systems, which are combined to context events in order to derive situations on partner level. Our works follows the Design Science in Information Systems Research to design and evaluate the architecture design. The preliminary descriptive evaluation uses life stock transports as an example

    Personalizing Course Design, Build and Delivery Using PLErify

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