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Introduction. The IFLA functional requirements for bibliographic records model has had a major impact on cataloguing principles and practices over the past fifteen years. This paper evaluates the model in the light of changes in the wider information environment (especially to information resources and retrieval) and in information seeking behaviour online, rather than in terms of library catal...

The projected multiplicity function of galaxies gives (per square degree) the density of galaxy aggregates formed by N members. We use the CRoNaRio matched catalogues to derive the low N (N < 15) multiplicity function from D-POSS data. The van Albada (1982) algorithm was implemented and used to identify candidate groups in the CRoNaRio catalogues. In absence of redshift surveys complete down to...

Electronic Product Catalogues are the basis for offering and selling products in online market places. To be efficient, these catalogues have to provide a semantically precise description of product features to allow for effective matchmaking of products and customer requests. At the same time, the description has to follow a common terminology that allows the integration with the catalogues of...

is organized into three sections: pathway information , genomic information, and computational tools. The pathway information section includes searchable pathway maps and orthologue tables of metabolic and regulatory pathways. There are also extensive catalogues of diseases (human), organisms (completely sequenced genomes or chromosomes), cells (cell lineages), enzymes and`compounds'. All of th...

We apply simple optical and SZ cluster finders to mock galaxy catalogues and SZ flux maps created from dark matter halos in a (1 hGpc) dark matter simulation, at redshifts 0.5 and 0.9. At each redshift, the two catalogues are then combined to assess how well they can improve each other, and compared to several variants of catalogues made using SZ flux and galaxy information simultaneously. We u...

This paper is devoted to the problem of recovering a potential q in a domain in R for d ≥ 3 from the Dirichlet to Neumann map. This problem is related to the inverse Calderón conductivity problem via the Liouville transformation. It is known from the work of Haberman and Tataru [11] and Nachman and Lavine [17] that uniqueness holds for the class of conductivities of one derivative and the class...

Geospatial data, or data tied to a location on the Earth, are critical to solving today’s complex environmental, economic, and social problems. The use of GIS technologies for analysing spatial problems has become pervasive and, in the process, has created a demand for vast amounts of digital geospatial data. To meet that demand, the data that describe the characteristics of geographical space ...