A common strategy to assign keywords to documents is to select the most appropriate words from the document text. One of the most important criteria for a word to be selected as keyword is its relevance for the text. The tf.idf score of a term is a widely used relevance measure. While easy to compute and giving quite satisfactory results, this measure does not take (semantic) relations between words into account. In this paper we study some alternative relevance measures that do use relations between words. They are computed by defining co-occurrence distributions for words and comparing these distributions with the document and the corpus distribution. We then evaluate keyword extraction algorithms defined by selecting different relevance measures. For two corpora of abstracts with manually assigned keywords, we compare manually extracted keywords with different automatically extracted ones. The results show that using word co-occurrence information can improve precision and recall over tf.idf.
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The research described in this paper provides insights into tools and methods which are used by professional information workers to keep and to manage their personal information. A literature study was carried out on 23 scholar papers and articles, retrieved from the ACM Digital Library and Library and Information Science Abstracts (LISA). The research questions were: - How do information workers keep and manage their information sources? - What aims do they have when building personal information collections? - What problems do they experience with the use and management of their personal collections? The main conclusion from the literature is that professional information workers use different tools and approaches for personal information management, depending on their personal style, the types of information in their collections and the devices which they use for retrieval. The main problem that they experience is that of information fragmentation over different collections and different devices. These findings can provide input for improvement of information literacy curricula in Higher Education. It has been remarked that scholar research and literature on Personal Information Management do not pay a lot of attention to the keeping and management of (bibliographic) data from external documentation. How people process the information from those sources and how this stimulates their personal learning, is completely overlooked. [The original publication is available at www.elpub.net]
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A common strategy to assign keywords to documents is to select the most appropriate words from the document text. One of the most important criteria for a word to be selected as keyword is its relevance for the text. The tf.idf score of a term is a widely used relevance measure. While easy to compute and giving quite satisfactory results, this measure does not take (semantic) relations between words into account.
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The objective of this paper is a reflective discussion on the validity of the construct Information Literacy in the perspective of changing information and communication technologies. The research question that will be answered is: what is the impact of technological developments on the relevance of the Information Literacy concept? Technological developments that will be discussed are: - content integration (federated search engines) - amateur publishing (user generated content) - use of social networks to find information - personalisation and push technology - loss of context / fragmentation of information. Research methods: desk research and critical analysis of the results that were found. The analysis of the influence of the discussed technologies on the Information Literacy concept is represented by arrow diagrams. Findings: The Information Literacy concept refers to a set of sub skills varying from retrieval skills to critical use of scholar information. Changing technologies reduce the significance of the more instrumental sub skills of the Information Literacy concept. On the other hand, higher order cognitive skills (for instance critical evaluation of resources and analysis of content) become more and more important for students and professionals who try to solve their information problems. The paper concludes with a description of the facets of the Information Literacy concept that need extra attention in the education of the knowledge workers of the future. [De hier gepubliceerde versie is het 'accepted paper' van het origineel dat is gepubliceerd op www.springerlink.com . De officiële publicatie kan worden gedownload op http://www.springerlink.com/content/n32j3um878720h40/abstract/]
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This study explores how journalists in highspeed newsrooms gather information, how gathering activities are temporally structured and how reliability manifests itself in information-gathering activities.
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Een goede zoekstrategie voor brede onderwerpsgerichte zoekvragen is een heuristisch proces waarbij verschillende zoekmethodes stuk voor stuk worden toegepast. [Peter Becker en Jos van Helvoort]
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The central thesis of this book is that access to information represents a vital aspect of contemporary society, encompassing participation, accountability, governance, transparency, the production of products, and the delivery of services. This view is widely shared, with commentators and scholars agreeing that access to information is a key factor in maintaining societal and economic stability. However, having access to information does not guarantee its accessibility. Assuming that information is (cognitively) interpretable is incorrect, as many practical examples illustrate. In the first chapter, this book offers insights into the challenge of access to information in a digitalized world. The concepts of access and accessibility are addressed, elucidating their meanings and delineating the ways in which they are influenced by the exponential growth of information. It examines how information technology introduces a novel access paradox. The second chapter examines the challenges to access to and accessibility of information in a digitalized, hybrid world where code may be law, where there is an inescapable loss of privacy, where doing business opens and restricts access, where literacy is a necessity to survive ‘digital divides,’ and where environmental concerns may have an adverse effect on high expectations. The third chapter presents a review of theoretical approaches to access and accessibility from seven different research perspectives: information access disparity, information seeking, information retrieval, information quality, information security, information management, and archives management. Six approaches to information access and accessibility are identified: [1] social, economic, and political participation; [2] ‘smart’ and evolving technology; [3] power and control; [4] sense-making; [5] knowledge representations, and [6] information survival. The fourth chapter addresses the bottlenecks and requirements for information access and accessibility, culminating in a checklist for organizations to assess these requirements within their own business processes. In the fifth chapter, some perspectives on artificial intelligence and the future of information access are presented. The sixth chapter represents an attempt to draw conclusions and to bring this book to a close.
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The purpose of the research was the development of a questionnaire that can measure the behaviour of groups of students (for instance departments' cohorts) in Personal Information Management (PIM). Variables for the questionnaire were derived from the international literature on PIM. The questionnaire has been tested out on 79 students (last year before graduation) from four different departments of the Academy of ICT&Media at The Hague University of Applied Sciences. The students' responses were checked on consistency, item non response, desirability bias and information value of the results. All these criteria indicated that the questionnaire is an adequate tool for the assessment of PIM at an institutional level. The results that have been found for the four departments have not yet been discussed with the managers of the Academy and those of the individual departments. [De hier gepubliceerde versie is het 'accepted paper' van het origineel dat is gepubliceerd op www.springerlink.com . De officiële publicatie kan worden gedownload op http://www.springerlink.com/content/n0h3k71u85024xnt/]
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From the article: "Abstract Maintenance processes of Dutch housing associations are often still organized in a traditional manner. Contracts are based on lowest price instead of ‘best quality for lowest price’ considering users’ demands. Dutch housing associations acknowledge the need to improve their maintenance processes in order to lower maintenance cost, but are not sure how. In this research, this problem is addressed by investigating different supply chain partnering principles and the role of information management. The main question is “How can the organisation of maintenance processes of Dutch housing associations, in different supply chain partnering principles and the related information management, be improved?” The answer is sought through case study research."
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This chapter describes the use of a scoring rubric to encourage students to improve their information literacy skills. It will explain how the students apply the rubric to supply feedback on their peers’ performance in information problem solving (IPS) tasks. Supplying feedback appears to be a promising learning approach in acquiring knowledge about information literacy, not only for the assessed but also for the assessor. The peer assessment approach helps the feedback supplier to construct actively sustainable knowledge about the IPS process. This knowledge surpasses the construction of basic factual knowledge – level 1 of the ‘Revised taxonomy of learning objectives’ (Krathwohl, 2002) – and stimulates the understanding and application of the learning content as well as the more complex cognitive processes of analysis, evaluation and creation. This is the author version of a book published by Elsevier. Dit is de auteursversie van een hoofdstuk dat is gepubliceerd bij Elsevier.
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