An account is given of the development of the SHELX system of computer programs from SHELX-76 to the present day. In addition to identifying useful innovations that have come into general use through their implementation in SHELX, a critical analysis is presented of the less-successful features, missed opportunities and desirable improvements for future releases of the software. An attempt is m...

Bibster is a semantics-based Peer-to-Peer system for exchanging bibliographic data among researchers. Bibster exploits ontologies in data storage, query formulation, query routing and answer presentation. While the original Bibster system assumed a globally shared domain ontology, we here describe extensions to the Bibster system, that allow to learn personalized ontologies from the local bibli...

Measuring science is based on comparing articles to similar others. However, keyword-­‐based groups of thematically similar articles are dominantly small. These small sizes keep the statistical errors of comparisons high. With the growing availability of bibliographic data such statistical errors can be reduced by merging methods of thematic grouping, citation networks and keyword co-­‐usage.

In this paper we introduce a new method to estimate the co-citation similarity between scientific papers using a Web search engine. In this method, the similarity between two papers is computed based on the frequency that they are mentioned together on the Web. We call this method Web co-citation. We conducted experiments to compare performance of different citation-based methods: bibliographic...

To provide online access to citations from old hardcopy indexes published from 1879 through 1965, an R&D division of the National Library of Medicine (NLM) is developing an automated system to convert bibliographic information in volumes of the printed Quarterly Cumulative Index Medicus (QCIM) to machine-readable form for inclusion in the OLDMEDLINE® database. The system processes images scanne...

Web site summarization, which identifies the essential content covered in a given Web site, plays an important role in Web information management. However, straightforward summarization of an entire Web site with diverse content may lead to a summary heavily biased to the dominant topics covered in the target Web site. In this paper, we propose a two-stage framework for effective summarization ...

An evaluation is reported of user responses to zetoc, a service that provides access to the British Library electronic table of contents database and an email alerting service. Two questionnaire surveys and an interview programme gave data on over 800 users. The results show that about 17% are active users who are achieving a personal information management routine by integrating zetoc with oth...

Citation Segmentation in a Digital Humanities Context. Bibliographies are an important resource for scientific research. Their storage in (online) bibliographic databases offers efficient search functionalities for wide-spread and timely use in international research communities. For this purpose it is crucial to automatically detect the inherent structure of bibliographic references, by isolat...