Search results1 – 10 of over 22000
In the beginning of the 1990s it was decided to start educating journalists at two Danish universities. This was decided in the hope that such academic journalists would…
In the beginning of the 1990s it was decided to start educating journalists at two Danish universities. This was decided in the hope that such academic journalists would carry greater insight into that work. Therefore for the curricula of these students of journalism some traditional academic disciplines were introduced. One such academic discipline was information retrieval. It was clear, however, that the information retrieval course had to be designed specifically for the students of journalism, as the information needs of journalists differ from the information needs of more traditional academic disciplines. Thus, this article describes the work done in order to develop such a course for students of journalism. Firstly, it analyses the information needs of journalists on a theoretical basis. Secondly, an empirical study analyses which information retrieval resources are available to Danish journalists. Finally, it combines the theoretical and the empirical findings in arguing that it is necessary to provide students of journalism with a theoretical understanding of how online information retrieval works, and also practical experience with several information retrieval resources that they are supposed to use in their daily work.
The contrast between the value placed on discriminatory power in discussions of indexing and classification and on the transformation of a query into a set of relevant…
The contrast between the value placed on discriminatory power in discussions of indexing and classification and on the transformation of a query into a set of relevant records dominant in information retrieval research has not yet been fully explored. The value of delivering relevant records in response to a query has been assumed by information retrieval research paradigms otherwise differentiated (the cognitive and the physical). Subsidiary concepts and measures (relevance and precision and recall) have been increasingly subjected to critiques. The founding assumption of the value of delivering relevant records now needs to be questioned. An enhanced capacity for informed choice is advocated as an alternative principle for system evaluation and design. This broadly corresponds to: the exploratory capability discussed in recent information retrieval research; the value of discriminatory power in classification and indexing; Giambattista Vico‘s critique of the unproductivity of Aristotelian methods of categorisation as routes to new knowledge; and, most significantly, to ordinary discourse conceptions of the value of information retrieval systems. The criterion of enhanced choice has a liberating effect, restoring man as an artificer and enabling a continuing dialectic between theory and practice. Techniques developed in classic information retrieval research can be adapted to the new purpose. Finally, the substitution of the principle of enhanced choice exemplifies the development of a true science, in which previous paradigms are absorbed into new as special cases. Ay, in the catalogue ye go for men; As hounds, and greyhounds, mongrels, spaniels, curs, Shoughs, water‐rugs, and demi‐wolves, are clept All by the name of dogs: the valu’d file Distinguishes the swift, the slow, the subtle, The housekeeper, the hunter, every one According to the gift which bounteous Nature Hath in him clos’d; whereby he does receive Particular addition, from the bill That writes them all alike; Shakespeare. Macbeth. c.1606.
Internet + and Electronic Business in China is a comprehensive resource that provides insight and analysis into E-commerce in China and how it has revolutionized and…
Internet + and Electronic Business in China is a comprehensive resource that provides insight and analysis into E-commerce in China and how it has revolutionized and continues to revolutionize business and society. Split into four distinct sections, the book first lays out the theoretical foundations and fundamental concepts of E-Business before moving on to look at internet+ innovation models and their applications in different industries such as agriculture, finance and commerce. The book then provides a comprehensive analysis of E-business platforms and their applications in China before finishing with four comprehensive case studies of major E-business projects, providing readers with successful examples of implementing E-Business entrepreneurship projects.
Internet + and Electronic Business in China is a comprehensive resource that provides insights and analysis into how E-commerce has revolutionized and continues to revolutionize business and society in China.
The possibility of having access to all the world's literature from a single computer terminal stimulated the imagination of the research workers in the late' sixties. It…
The possibility of having access to all the world's literature from a single computer terminal stimulated the imagination of the research workers in the late' sixties. It was this goal and the fascination of the co‐operation between man and machine, that inspired the major changes that have taken place in Information Retrieval over the past ten years.
The following bibliography focuses mainly on programs which can run on IBM microcomputers and compatibles under the operating system PC DOS/MS DOS, and which can be used…
The following bibliography focuses mainly on programs which can run on IBM microcomputers and compatibles under the operating system PC DOS/MS DOS, and which can be used in online information and documentation work. They fall into the following categories:
This review reports on the current state and the potential of tools and systems designed to aid online searching, referred to here as online searching aids. Intermediary…
This review reports on the current state and the potential of tools and systems designed to aid online searching, referred to here as online searching aids. Intermediary mechanisms are examined in terms of the two stage model, i.e. end‐user, intermediary, ‘raw database’, and different forms of user — system interaction are discussed. The evolution of the terminology of online searching aids is presented with special emphasis on the expert/non‐expert division. Terms defined include gateways, front‐end systems, intermediary systems and post‐processing. The alternative configurations that such systems can have and the approaches to the design of the user interface are discussed. The review then analyses the functions of online searching aids, i.e. logon procedures, access to hosts, help features, search formulation, query reformulation, database selection, uploading, downloading and post‐processing. Costs are then briefly examined. The review concludes by looking at future trends following recent developments in computer science and elsewhere. Distributed expert based information systems (debis), the standard generalised mark‐up language (SGML), the client‐server model, object‐orientation and parallel processing are expected to influence, if they have not done so already, the design and implementation of future online searching aids.
A grid information retrieval model has benefits for sharing resources and processing mass information, but cannot handle conceptual heterogeneity without integration of…
A grid information retrieval model has benefits for sharing resources and processing mass information, but cannot handle conceptual heterogeneity without integration of semantic information. The purpose of this research is to propose a concept‐based retrieval mechanism to catch the user's query intentions in a grid environment. This research re‐ranks documents over distributed data sources and evaluates performance based on the user judgment and processing time.
This research uses the ontology lookup service to build the concept set in the ontology and captures the user's query intentions as a means of query expansion for searching. The Globus toolkit is used to implement the grid service. The modification of the collection retrieval inference (CORI) algorithm is used for re‐ranking documents over distributed data sources.
The experiments demonstrate that this proposed approach successfully describes the user's query intentions evaluated by user judgment. For processing time, building a grid information retrieval model is a suitable strategy for the ontology‐based retrieval model.
Most current semantic grid models focus on construction of the semantic grid, and do not consider re‐ranking search results from distributed data sources. The significance of evaluation from the user's viewpoint is also ignored. This research proposes a method that captures the user's query intentions and re‐ranks documents in a grid based on the CORI algorithm. This proposed ontology‐based retrieval mechanism calculates the global relevance score of all documents in a grid and displays those documents with higher relevance to users.