Diese Datenbank enthält über 40.000 Dokumente zu Themen aus den Bereichen Formalerschließung – Inhaltserschließung – Information Retrieval.
© 2015 W. Gödert, TH Köln, Institut für Informationswissenschaft / Powered by litecat, BIS Oldenburg (Stand: 28. April 2022)
1Li, W. ; Zheng, Y. ; Zhan, Y. ; Feng, R. ; Zhang, T. ; Fan, W.: Cross-modal retrieval with dual multi-angle self-attention.
In: Journal of the Association for Information Science and Technology. 72(2021) no.1, S.46-65.
Abstract: In recent years, cross-modal retrieval has been a popular research topic in both fields of computer vision and natural language processing. There is a huge semantic gap between different modalities on account of heterogeneous properties. How to establish the correlation among different modality data faces enormous challenges. In this work, we propose a novel end-to-end framework named Dual Multi-Angle Self-Attention (DMASA) for cross-modal retrieval. Multiple self-attention mechanisms are applied to extract fine-grained features for both images and texts from different angles. We then integrate coarse-grained and fine-grained features into a multimodal embedding space, in which the similarity degrees between images and texts can be directly compared. Moreover, we propose a special multistage training strategy, in which the preceding stage can provide a good initial value for the succeeding stage and make our framework work better. Very promising experimental results over the state-of-the-art methods can be achieved on three benchmark datasets of Flickr8k, Flickr30k, and MSCOCO.
Inhalt: Vgl.: https://asistdl.onlinelibrary.wiley.com/doi/10.1002/asi.24373.
2Huang, S.-L. ; Lin, S.-C. ; Chan, Y.-C.: Investigating effectiveness and user acceptance of semantic social tagging for knowledge sharing.
In: Information processing and management. 48(2012) no.4, S.599-617.
Abstract: Social tagging systems enable users to assign arbitrary tags to various digital resources. However, they face vague-meaning problems when users retrieve or present resources with the keyword-based tags. In order to solve these problems, this study takes advantage of Semantic Web technology and the topological characteristics of knowledge maps to develop a system that comprises a semantic tagging mechanism and triple-pattern and visual searching mechanisms. A field experiment was conducted to evaluate the effectiveness and user acceptance of these mechanisms in a knowledge sharing context. The results show that the semantic social tagging system is more effective than a keyword-based system. The visualized knowledge map helps users capture an overview of the knowledge domain, reduce cognitive effort for the search, and obtain more enjoyment. Traditional keyword tagging with a keyword search still has the advantage of ease of use and the users had higher intention to use it. This study also proposes directions for future development of semantic social tagging systems.
Inhalt: Vgl.: doi:10.1016/j.ipm.2011.07.004.
Themenfeld: Social tagging
3Han, Y.: ¬A RDF-based digital library system.
In: Library hi tech. 24(2006) no.2, S.234-240.
Abstract: Purpose - To research a resource description framework (RDF) based digital library system that facilitates digital resource management and supports knowledge management for an interoperable information environment. Design/methodology/approach - The paper first introduces some of issues with metadata management and knowledge management and describes the needs for a true interoperable environment for information transferring across domains. A journal delivery application has been implemented as a concept-proof project to demonstrate the usefulness of RDF in digital library systems. Findings - The RDF-based digital library system at the University of Arizona Libraries provides an easy way for digital resource management by integrating other applications regardless of metadata formats and web presence. Practical implications - A journal delivery application has been running in the RDF-based digital library system since April 2005. An electronic theses and dissertation application will be handled by the same system. Originality/value - The paper suggests to use RDF, the semantic web technology, as a new approach to facilitate knowledge management and metadata management. Using RDF technology brings new ways to manage and discover information for libraries.
Themenfeld: Content Management System